Note: Descriptions are shown in the official language in which they were submitted.
s
Title
IMPROVF:MENT~ IN Tl-lE MANUFACTURE OF` GLASS l; IBRE TRUCK BODI ES
Fiel of Invention
This invention relates to the manuEacture of bodies for
vans, trai].ers, trucks and the like.
In particul.ar, this invention rel.ates to improvements in
the apparatus an~ systems used in the manuEacture oE glass fibre
reinforced bodie~s for vans, trailers, trucks and the like.
sackground of Invention
The manuEacture of glass fibre reinforced truck bodies is
described in prior Canadian Appl.ication Serial. No. 458,535 filed
July 10, 1983, which issued as Patent No. 1,223,4l9 on June 30,
19~7 and is assigned to Unice.l1. Limited.
The present invention relates to improvements in the
apparatus described in the above application.
In the prior application, the guidance system which is
used Eor guiding the movement of the work head about the U-shaped
path includes a rack which extends around the U-shaped guide path
and a p:inion which is mounted on the turntable and travels along
the rack. While this mechanism operates eEfectively to guide the
work head in the required path, it has becn Eound that this
mechanism is subject to a substantial degree of wear.
This diEEiculty has ~een overcome by the mechanism oE the
present invention by emp10ying a drive chain which is mounted on
sprockets to Eol].ow the required U-shaped path and providing a
reversible motor which drivingly engages the chain so as to move
the chain i.n opposite directions as required to efEect reversal of
the direction of rotation of the turntable on which the workhead
is mounted.
It has been found that the overall efEiciency oE the body
manuEacturing system can be greatly increased if a plurality of
mol.ds are provided ;n the molding station and the glass fibre
app].icator is movable from one mold to the other tc form glass
fibre shells in each mold as required.
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I have ound that by providing a plurality of molds it
is possible to ensure that the glass fibre applicator is utilized
to its maximum extent while permitting a sufficient dwell time for
each molded shell in each mold to permit it to be cured and to be
fitted with an appropriate liner and to be removed from its mold.
To further increase efficiency, a trimming station is
provided remote from each molding station and a conveyor system is
provided for conveying the reinforced molded shells from each mold
to the trimming station by providing the trimming station remote
frorn the molds, it is possible to avoid contamination of the molds
by the trimmings which are removed and to ensure maximum
utilization of the molds for their primary purpose which is the
forming of the shells and the fitting of the liners to the shells.
A further difficulty which has been experienced in
attempting to provide a glass fibre applicator which can be
transported from one mold to another is that it is necessary
toprovide power supply cables for supplying electrical and other
power lines to the applicator. Difficulty has been experienced in
attempting to avoid a situation where the power lines become fouled
as a result of movement of the carriage on which the glass fibre
applicator is mounted as the carriage moves from one mold to the
other.
These difficulties have been overcome by providing a
takeup means which will deploy and take up the power supply cable
as the trolley moves toward and away from one end of the track on
which it is mounted for movement betweer. molds.
In processes for forming glass fibre reinforced plastic
bodies where glass fibres are chopped, and sprayed together with a
resin onto a mold, considerable difficulty has been experienced in
attempting to provide a safe working environment for machine
operators. It is necessary to extract the noxious fumes and glass
fibre particles from the work station and difficulty has been
experienced in attempting to achieve this objective in large open
work areas such as the large molds required in the formation of
truck bodies and the like.
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In an attempt to provide an improved working envirGnment
there is provided a canopy for each mold. The canopies extend over
and close the open top of its associated mold. An air extraction
outlet is provided in the canopy at the closed end of the mold
remote from the open end of the mold and an air extraction device
communicates with the air extraction outlet of each canopy. In
addition, a fresh air supply is provided which has outlets disposed
opposite the open front end of each mold for directing a stream of
fresh air into the front end of each mold to replace the
contaminated air which is withdrawn by the extraction means in use.
In previous body manufacturing systems in which large
glass fibre reinforced plastic bodies have been manufactured, it
has been the practice to form the shell in a mold and and then
manually insert reinforcing members.
It has been found that the efficiency of operation in the
manufacture of glass fibre reinforced plastic bodies can be
substantially increased if, following the forming of the shell in
the mold, a liner is fitted to the shell with the aid of a liner
inserter and after the liner has been secured to the shell, the
assembly is then removed from the mold.
Because the liner must fit closely within the glass fibre
reinforced plastic shell, difficulty was experienced in attempting
to locate the liner in the shell when it is in the mold because the
walls of the mold are substantially rigid.
To facilitate the location of the liner in the mold,
there is provided a liner inserter which will support the side and
end wall panels of the liner in a toed-in configuration which will
facilitate the entry of the liner panels into the mold. In
addition, the inserter will support the normally convex roof beams
in a concave configuration prior to insertion into the mold. A
jacking mechanism is provided for jacking the side and end panels
of the liner into intimate contact with the walls of the shell and
a release mechanism is provided for releasing the roof beams from
their convex curvature so that they will extend into intimate
contact with the bottom wall of the shell.
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Considerable difficulty has been experienced in
attempting to remove a glass fibre reinforced plastic body from a
mold in which it is formed.
It has been found that a glass fibre reinforced plastic
body with liners attached thereto can be removed from a mold by
providing a stripper for stripping the body from the mold. The
stripper includes clamps which can be clamped to opposite upper
edge portions o~ the side panels of the liner and a suspension
system which will transmit an inwardly and upwardly force to each
clamp tending to draw the side walls of the molded body inwardly
and upwardly to separate from the walls of the mold.
Glass fibre reinforced plastic bodies are usually made so
as to be oversized when molded and it is necessary to trim the
molded shells to the required configuration after molding.
In order to facilitate and expedite this trimming
process, there is provided a trimming station in which trimming
aids are located which include guides which can be secured to the
shell which is to be trimmed so as to provide a trimming guide to
facilitate the removal of access material. In addition, the
trimming station provides a convenient location for installation of
the floor of the body. Because the glass fibre body is in an
upside-down configuration when it is molded and is maintained in
this upside-down configuration when located in the trimming
station, the floor can be mounted on the body when in the
upside-down configuration merely by lowering the floor assembly
into the open upper end of the molded body.
Because the method of manufacturing and assembling the
body calls for the body to be maintained in an upside-down
configuration until the floor has been fitted, it is necessary to
turn the body right-side-up before it is fitted to a chassis. The
bodies which are formed by the method of the present invention are
generally rather large and may measure 28 feet by 8 feet by 8 feet
or more and as a consequence, it is difficult to turn the bodies
right-side-up without damage to the bodies and without providing a
complex and expensive inverting mechanism.
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D48-2547-151
~ o overcome these difficulties, there is provided a body
inverting mechanism which will initially engage the body at a point
below its centre of gravity, relocate the body clear o~ its
surroundings, release the body to permit controlled rotation of the
body under its own weight to a position in which it is
right-side-up.
S_mmary_of Inventi_n
It is an object of the present invention to provide an
improved method of manufacturing bodies for vans, trailers, trucks
and the like which include a glass fibre reinforced plastic outer
shell.
It is a further object of the present invention to
provide an improvement in the molding station of a glass fibre
reinforced plastic mold wherein a single glass fibre applicator is
supported for movement between a plurality of molds.
It is yet another object of the present invention to
provide an improved air venting and circulation system for use in
the molding of glass fibre shells for vans, trailers, trucks and
the like.
It is a still further object of the present invention to
provide an improved power transmission system for driving and
guiding a workhead along a U-shaped guide track.
It is yet another object of the present invention to
provide a transport system for use in transporting molded bodies
assemblies from any one of a number of molding stations to a
trimming station which is remote from the molding station.
It is a still a further object of the present invention
to provide a lining inserter for use in inserting the reinforcing
side wall panels, end wall panels and roof beams into the molded
glass fibre shell when it is located in the mold in which it is
formed.
It is another object of the present invention to provide
a stripper mechanism for stripping the glass fibre body from the
mold after attachment of the side and end panels thereto.
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D48-2547-151
It is yet another object of the present invention to
provide a trimming station remote frorn the molding stations in
which trimming aids are provided.
It is a still further object of the present invention to
provide a righting mechanism for turning the body right-side-up
after it has been trimmed.
According to one aspect of the present invention there is
provided a body manufacturing system for manufacturing bodies for
vans, trailers, trucks and the like which comprises, a molding
station having a plurality of molds each of which has a bottom
face, a pair of oppositely disposed side faces and an end face,
each mold having an open top and an open front end, the molds being
arranged in a side-by-side relationship with their open front ends
disposed toward a guide path which extends transversely thereof, a
glass fibre applicator adapted to apply a layer of compacted glass
fibre and resin to the bottom side and end faces of one of said
molds to form a glass fibre shell, longitudinal guide means
associated with each mold for guiding the glass fibre applicator
along the length of each mold as it applies the required layer to
form said shell, transfer means adapted to support said applicator
and transport it along said guide path from one mold to another,
insert locating means adapted to support side wall, end wall and
roof inserts for movement between a first position in which the
inserts are disposed to facilitate entry into one of said molds and
a second position in which the inserts are operably located in
intimate contact with the glass fibre shell and cooperate therewith
to form a body, said insert locating means being movable to said
first position after the inserts have been operably located to
permit removal of the insert locating means froln the mold,
extraction means for extracting the body from the mold in which it
is formed and righting means adapted to support said body and to
turn it right side up for mounting on a chassis of a vehicle.
D48-2547-151
According to a further aspect of the present invention
there is provided, in a molding station for use in molding glass
fibre shells Eor bodies of vans, trailers, trucks or the like, the
improvement of, a plurality of molds each having a bottom face, a
pair of oppositely disposed side ~aces and an end face, an open top
and an open Eront end, said molds being arranged in a side-by-side
relationship with the open ends thereof opening toward a guide
track which extends transversely thereof, a transfer trolley
mounted for movement along said ~uide track to be aligned with the
open end of any one of said molds, a glass fibre applicator adapted
to apply a layer of compacted glass fibre and resin to the bottom
side and end faces of one of said molds to form a glass fibre
shell, a carriage supporting said applicator for movement onto and
off of said transfer trolley and along each mold as required, a
power supply at one end of said guide track, power supply cable
means having a first end held fast with respect to the power supply
and a second end mounted on said carriage for movement therewith,
said power supply cable also being held fast with respect to the
transfer trolley at a point intermediate the ends thereof, said
power supply cable having a first length extending from said first
end to said point sufficient to extend to the trolley when it is
located at the mold which i~ most distant from the power supply and
a second length extending from said point to said second end which
is sufficient to permit said carriage to be located in an operable
position adjacent the end face of any of said molds, take-up means
located at said one end of said ~.3uide track and engaging said first
length of said cable to take up or deploy the slack in said first
length as said trolley moves toward and away from said one end of
said track.
According to another aspect of the present invention
there is provided, in a molding station for use in molding glass
fibre shells for bodies of vans, trailers, trucks or the like, the
improvement of, a plurality of molds each having a bottom face, a
pair of oppositely disposed side faces and an end face, an open top
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D48-2547-151
and an open front end, said molds being arranged in a side-by-side
relationship with the open ends thereof opening toward a guide
track which extends transversely thereof, a transfer trolley
mounted for movement along said guide track to be aligned with the
open end of any one of said molds, a canopy for each mold, each
canopy extending over and closing the open top of its associated
mold, each canopy having an open front end aligned with the open
end of its associated mold and an air extraction outlet at the
other end thereof proximate the end wall of its associated mold,
extraction means communicating with each extraction outlet for
extracting air therethrough, and, fresh air supply means having
outlets disposed opposite the open front end of each mold for
directing a stream of fresh air into the front end of each mold to
provide a supply of fresh air to replace the contaminated air which
is withdrawn by the extraction means in use.
According to yet another aspect of the present invention
there is provided, in a guidance system for guiding a work head
along a predetermined path having; a U-shaped guide track extending
in a first plane, a turntable mounted for rotation about a first
axis which extends perpendicular to said first plane and is located
equidistant from each side of the U-shaped guide track, a track
follower mounted in said track , a first slide member slidably
mounted on said turntable for movement with respect to said
turntable in a first radial direction with respect to said first
axis, a second slide member slidably mounted on said turntable for
radial movement with respect to said first axis in a direction
opposite said first direction, a work head mounted on said second
slide member for movement therewith, and power transmission means
for driving said track follower and said slide members whereby the
second slide member is the slave of the track follower, the
improvement wherein the power transmission means comprises; a drive
chain having portions of its length coextensive with, and mounted
for movement along, said U-shaped guide track, a sprocket mounted
for rotation at each corner of the U-shaped guide track, said
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sprockets engaging and guiding said chain around said corners,
said tr~ck follower comprising a follower roller mounted on said
drive chain for movernent along said guide track with said chain,
drive means drivinqly connected to said drive chain for driving
said chain to and fro along said track, said first slide member
being secured to said follower for movement therewith along said
U-shaped guide track to effect radial movement o~ said first slide
member with respect to said turntable, a first rack member mounted
on said slide member for movement therewith, a pinion member
mounted for rotation on said turntable, said pinion member having a
first pinion gear portion meched with said first rack and a larger
second gear portion, said first and second gear portions having a
gear ratio which is proportional to the ratio of the proportions of
the guide track to the proportions of said predetermined path, a
second rack member mounted on said second slide member and meshed
with said second gear to drive said second slide member in response
to rotation of said turntable as aforesaid.
According to another aspect of the present invention
there is provided, in a guidance system for guiding a work head
along a predetermined path having; a frame, a ~-shaped guide track
on said frame and extending in a first plane, a turntable mounted
for rotation about a first axis which extends perpendicular to said
first plane and is located equidistant .Erom each side of the
~-shaped guide track, a track follower mounted in said track , a
first slide member slidably mounted on said turntable for movement
with respect to said turntable in a first radial direction with
respect to said first axis, a second slide member slidably mounted
on said turntable for radial movement with respect to said first
axi~ in a direction opposite said first direction, a work head
mounted on said second slide member for movement therewith, and
power transmission means for driving said track follower and said
slide members whereby the second sl.ide member is the slave of the
track follower, the improvement wherein the power transmission
means comprises; a drive chain having portions of its length
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coextensive with, and mounted for movement along, said U-shaped
guide track, a sprocket mounted for rotation at each corner of the
~-shaped guide track, said sprockets engaginy and guiding said
chain around said corners, said track follower comprising a
follower roller mounted on said drive chain for movement along said
guide track with said chain, a variable speed reversible drive
motor mounted on said frame and having a drive sprocket drivingly
engaging said drive chain and control means for controlling the
direction of rotation and speed of operation of said drive motor to
control the direction of rotation and speed of operation of said
ork head.
According to yet another aspect of the present invention
there is provided, in a body manufacturing system for manufacturing
bodies for vans, trailers, trucks and the like comprising: a
molding station having a plurality of molds each of which has a
bottom face, a pair of oppos.itely disposed side faces and an end
face which are larger in area than the required area of the
corresponding side, top and end walls of the body to be formed
therein, each mold having an open top and an open front end, the
molds being arranged in a side-by-side relationship with their open
front ends disposed toward a guide path which extends transversely
thereof, a trimming station remote from said molding station, an
overhead rail system for use in transporting a molded body from any
one of said molds to said trimming station comprising, a first
guide rail located above and extending longitudinally of each mold,
each first guide rail having an outer end located outwardly from
the open front end of its associated mold, a second guide rail
comprising a plurality of serially arranged segments, the first of
which extends from the trimming station to a first transfer point
adjacent the outer end of a first of said guide rails and
successive segments extending from said first transfer point to
successive transfer points adjacent the outer ends of adjacent
first guide rails with the last segment being connected directly to
the last first guide rail, and, switching means at each transfer
point which is operable to connect successive segments of said
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D48-2547-151
first guide rail to one another or to the outer end of an adjacent
first guide rail whereby any one of said first guide rails may be
connected to the first segments of the second guide rail.
According to yet another aspect of the present invention
there is provided, in a body manufacturing system for manufacturing
bodies for vans, trailers, trucks or the like having a mold which
has a bottom face, a pair of oppositely disposed side faces and an
end face upon which a glass fibre shell is formed in use, the
improvement; a lining inserter frame comprising; a bottom wall, a
pair of oppositely disposed side walls pivotally mounted on and
extending upwardly from opposite sides of said bottom wall, a front
wall pivotally mounted on and extending upwardly from the front end
of said bottom wa]l, said end and side walls being adapted to
support end and side panels outwardly therefrom in a face-to-face
relationship and beam support means on said bottom wall for
supporting a plurality of roof beams, first jacking means connected
to said frame and said side walls and second jacking means
connected to said frame and said end wall, said first and second
jacking means being operable to cause said side and end walls to
pivot between and inwardly inclined position in which side and end
wall panels located thereon are toed inwardly to facilitate entry
of the inserter into a mold and an upright position in which the
side and end panels of the liner may be located in a face-to-face
relationship with the side and end faces of a molded shell located
in a mold, and roof beam biasing means on said bottom wall for
engaging said roof beams intermediate their ends to initially bias
the roof beams inwardly, said roof beam biasing means being
releaseable from a roof beam to permit the roof beam to move into
intimate contact with the underlying shell portion.
According to another aspect of the present invention
there is provided, in a body manufacturing system in which a body
for a van, truck or the like is formed in a mold, the body
comprising a molded glass fibre shell and a liner which comprises a
pair of oppositely disposed side panels and an end panel, the side
D48-2547-151
panels having exposed upper edge portions, the improvement of
stripper means for stripping the body from the mold comprising;
first and second clamp means disposed opposite one another and
adapted to be releaseably secured to the exposed upper edqe
portions of the side panels of a liner of a body mounted in the
mold, bridge means extending between said oppositely disposed clamp
means, said bridge means being adapted to telescope to permit
movement of said oppositely disposed clamping means toward one
another, suspension means for suspending said bridge means
comprising; a centrally located suspension cable and a pair of
diverging side cables extending from the central cable one to each
oppositely disposed clamp means, and hoist means for raising the
central cable and transmit an inwardly and upwardly directed force
to each clamp means tending to draw the side walls upwardly and
inwardly toward one another, to te].escope the bridge member and
separate the side walls of the body from the mold to facilitate
removal of the body from the mold.
According to yet another aspect oE the present invèntion
there is provided, in a body manufacturing system for manufacturing
a body for a van, truck or the like in which an oversi~ed glass
fibre reinforced plastic shell is formed in a mold and is lined
with a rigidifying liner, the improvement of a trimming station
remote from the mold in which the liner is formed comprising; a
side rail assembly extending longitudinally of the trimming
station, support means for supporting said side rail assembly so
that it may be raised or lowered with respect to the side wall of a
body located in an upside-down position in said trimming station,
clamping means on said support means for releaseably securing said
support means to the side wall of a body located in said trimming
station, slide means slidably mounted on said support means for
longitudinal movement along said support means and cutter means
mounted on said slide member for movement therewith to cut the side
walls of said shell as the slide member moves along the support
means to remove excess material from the shell.
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According to A further aspect of the present invention
there i5 provided, in a body manufacturing system for use in
manufacturing bodies for vans, trailers, trucks and the like
wherein the body is oriented so as to be upside down when its
manufacture has been substantially completed, the improvement of; a
body righting mechani~m for turning the body right-side-up
comprising; hoist means which is operable to be raised or lowered
as re~uired, a pair of support columns suspended frorn said hoist
means in a spaced relationship for movement with said hoist means,
rotor means mounted for rotation on each support means about a
common axis, each rotor means being adapted to be secured to
opposite ends of a body below the centre of gravity of the body,
damper means communicating with each rotor means for controlling
the rate at which each rotor means may rotate, brake means at at
least one of said rotor means for releaseably securing said one
rotor means against rotation,
Brief Desc_iptio_ of Dr_win~
Figure 1 is pictorial view of a molding station and glass
fibre applicator constructed in accordance with an embodiment of
the present invention.
Figure la is a partially sectioned side view of the
latching mechanism which serves to align the transfer trolley with
respect to each mold.
Figure 2 is a front view of a portion of the applicator
assembly showing the power transmission chain and sprocket
assembly,
Figure 3 is a sectional view taken along the line 3-3 of
Figure 2.
Figure 4 is a sectional view taken along the line 4-4 of
Figure 2.
Figure 5 is a pictorial view illustrating the motor speed
control system for controlling the speed and extent of movement of
the workhead.
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D48-2547-151
Figure 6 is an end view of a mold showing various
positions of the workhead as it traverses the mold.
Figure 7 is a side view of a mold showing the movement of
the workhead with respect to the end wall of the mold.
Figure 8 is a pictorial view of the wall panel inserter
constructed in accordance with an embodiment of the present
invention.
F~igure 9 is an end view of the inserter of Figure 8
showing the movement of the side wall panels between their toed-in
position and their upright position and the movement of the roof
beams between their concave arch position and their released
position.Figure 10 is a sectional view taken along the line 10-10
illustrating a pressure pad in its extended position.
Figure 11 is an enlarged detailed view of the movable
pressure pad illustrated in Figure 9.
Figure 12 is a pictorial detailed view of the end
mounting mechanism for the roof beams and the locater for locating
the side wall panels.
Figure 13 is a plan view of a portion of the inserter
showing the end panel locater and the mechanism for applying
pressure to the end panel.
Figure 14 is a sectional view taken along the line 14-14
of Figure 8.
Figure 15 is a sectional view through a side and top wall
of the mold showing the positioning of the side panels and roof
beams with respect to the side and bottom of the molded shell.
Figure 16 is a pictorial view illustrating the removal of
the assembled body and shell from a mold.
Figure 17 is a pictorial view illustrating the clamping
mechanism used for clamping the body to remove it from the mold.
Figure 18 is a side view of the gripper mechanism used
for gripping the roof beams and locating them in concave arched
configuration during the inserting of the roof beams into the
molded shell.
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Figure 19 is a pictorial view of an end of a body shell
showing the mounting of an end cap at the open end of the molded
shell.
Figure 20 is a sectional view through an assembled end
cap taken in the direction of the line 20-20 of Figure 19.
Figure 21 is a diagrammatic plan view illustratiny the
layout of the transport rail system used for transporting bodies
from the various molds of the molding station to the trimming
station.
Figure 22 is a sectional view taken along the line 22-22
of a switch used for selectively connecting the transport rails to
one another.
Figure 23 is a pictorial view of a trimming station
constructed in accordance with an embodiment of the present
invention.
Figure 24 is a pictorial view of a body righting
mechanism constructed in accordance with an embodiment of the
present invention.
Figure 25 is a sectional view taken through the body of
Figure 24 along the line 25-25 illustrating the mounting of the
floor boards.
Figure 26 is a pictorial view illustrating one of the
mounting assemblies used for mounting the body onto the body
righting mechanism.
Figure 27 is a side view of the mounting mechanism of
Figure 26 showing the mounting plug in its contracted
configuration.
Figure 28 is a side view of the mounting mechanism of
Figure 27 showing the mounting mechanism mounted in a passage
formed in the body.
Figure 29 is a pictorial view of the second type of
mounting mechanism used for mounting the body to the body righting
mechanism.
Figure 30 is a side view of the mechanism of Figure 29
showing the mounting mechanism mounted on a body.
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D48-2547-151
Eigure 31 is a diagrammatic illustration of the rotation
of the body from its upside-down position to a right-side-up
position on the chassis of a vehicle.
Description of Preferred Embodiment
With reference to Figure 1 of the drawings, the reference
numeral 10 refers generally to a molding station constructed in
accordance with an embodiment of the present invention. A
plurality of molds 12 is located in the molding station. For the
purposes of forming a glass fibre reinforced plastic shell in the
molds, an applicator 14 is provided which is mounted on a transfer
trolly 16 for movement from one mold 12 to another.
For the purposes of inserting reinforcing side and end
wall panels within the glass fibre reinforced plastic shells which
are formed in the mold, a liner inserter 18 (Fig.8) is provided.
After the reinforcing liner elements have been mounted in the
molded shell to ~orm a body, it is necessary to remove the body
from the mold and for this purpose, a mold extractor 20 (Fig.16) is
provided. To facilitate the finishing and trimming of the body, a
trimming station 22 (Fig.23) is provided. As illustrated in Figure
21 of the drawings, an overhead rail system 24 is provided for use
in transporting a molded body from any one of the molds 12 to the
trimming station 22. As illustrated in Figure 24 of the drawings,
a body righting mechanism is provided ~or use in turning the body
right-side-up.
Moldin~ Station
The molding station 10 will now be described with
particular reference to Figure 1 of the drawings. As shown in
Figure 1, each of the molds 12 has a bottom face 28, a pair of
oppositely disposed side faces 30 and an end face 32, the mold
cavity 34 which is formed by the bottom face 28, side faces 30 and
end face 32, is proportioned so as to be greater in size than the
proportions of the body which forms the end product. Guide rails
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D48-2547-151
35 are located in a spaced parallel relationship with respect to
the upper edges 33 of the side walls of the mo]d 12. l~he guide
rails 35 each have a notch 37 formed at the front end thereof. The
bottom wall, side walls and end wall of each mold may be made from
any suitable rigid material such glass fibre reinforced plastic,
sheet metal or the like and a stiffening support frame 36 is
provided outwardly of each wall of the mold to provide the required
rigidity. The bottom, side and end faces are formed with a surface
finish and a contour which corresponds to that required on the
outer surface of the molded shell.
Each mold 12 has an open top 38 and an open front end 40.
The molds 12 are arranged in a side-by-side relationship with their
open front ends 40 disposed toward a guide path 42 which is in the
form of a guide trough 44.
For the purposes of extracting contaminated air and
supplying fresh air to each mold, an air extraction system 46 and
an air supply system 48 is provided.
The air extraction system 46 includes a canopy 50 located
above the open upper end of each mold. Each canopy 50 has an open
front end 52 which is aligned with the open front end 40 oE its
associated mold. An end wall 54 is located at the back end of each
canopy 50 and has a screened air extraction passage 56 opening
therefrom into a duct 58 which is connected to an air extraction
blower 60. When the air extraction blower is in operation, a
substantial volume of air is extracted from each mold through the
extraction passages 56. To provide a supply of fresh air for each
mold cavity, the air supply duct 48 is arranged to extend across
the open front ends 52 of the canopy 50 in a spaced relationship
thereto and is provided with a plurality of discharge passages 62
which are arranged to direct a supply of fresh air toward the mold
cavities 34.
To increase the face velocity of the air moving through
the mold cavity and ensure that fresh air is constantly directed to
the operators work station, an end wall 64 is mounted on the
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D48-2547-151
applicator 14 and is shaped to Eit in a close fitting sliding
relationship within the contour of the cross-section of the canopy.
The end wall 64 directs the movement of fresh air through the
operator work station to the extraction passage 56.
Trans_er T rolly
The transfer trolly 16 has a base 66 which is mounted on
wheels 68. A tracking wheel 70 is mounted on the base 66 and
extends into the guide trough 44. A small hydraulic drive motor 72
is drivingly connected to one of the wheels 68 through a reduction
gear 74. By activating the hydraulic motor 72, the transEer trolly
16 can be moved to any point along the length of the guide path 42
so as to be located opposite any one of the molds 12. The transfer
trolly 16 has horizontal guide rails 76 located at the upper end of
support columns 78. For the purposes of aligning the guide rails
76 of the transfer trolly with the guide rails 35 of each mold, a
latch mechanism generally identified by the reference numeral 80
(Fig. la) is provided. The latch mechanism includes a latch plate
82 which is pivotally mounted at the end of the guide rail 76 and
is connected by means oE a lever arm 8~ to the shaft 86 which is
carried by a piston which iq mounted for movement in a cylinder
88.Electrical, air po~er and materials supply lines include a first
length 90 which has a first end 94 connected to a power source 92
and a second end connected and held fast to a junction box 98 which
is located on the transfer trolley 16. This first length 90 forms
a first umbilical cord assembly 96 which extends from the source 92
to a junction box 98 on the transfer trolly 16 which serves to
permit movement of the trolley with respect to the power source.
The various supply lines extend from the junction box to the
various powered drives and the like.
A second umbilical cord assembly 100 extends from the
transfer trolley 16 to the bogey 126. The second umbilical cord
100 has an end 101 which is mounted on the bogey 126. A third
18
c~45
D48-2547-151
umbilical cord 103 of the power supply lines, which include
hydraulic supply lines has one end connected to the bogey and its
other end connected to the carriage 134. It will be apparent that
the make up of the umbilical cords will vary according to the
downstream requirements of the mechanisms which are to be operated
or controlled thereby.
A take-up mechanism 104 is provided for the purposes of
taking up slack in the first umbilical cord assembly 96. The
take-up mechanism 104 includes an upright post 106 which has a
pulley 108 located at the lower end thereof and a take-up pulley
109 which is mounted on a slide 114 which is slidably mounted in
the channel 110. The counterweight 112 is connected bymeans of a
cable 116 to the slide 114. The cable 116 extends around a pulley
118 which is located at the upper end of the upright post 106. In
use, when the trolly 16 moves away from the upright post 106, the
power supply cable 90 is deployed from the take-up mechanism 104 by
causing the take-up pulley 109 to be lowered and this has the
effect of raising the counterweight 112. When the trolly 16 moves
toward the take-up mechanism the slack which is formed in the first
length 96 of the power supply cable is taken up by the effect of
the counterweight which raises the pulley 109 to take-up the slack.
The A~lica or
The applicator 14 is mounted on a carriage assembly 120
which has a work platform 122 and upright columns 124 which depend
from a wheeled bogey 126 which i.s mounted on the guide rails 76 of
the transfer trolly 16. A drive motor 128 is mounted on the bogey
126 and drivingly engages one of the wheels 130 of the bogey,
through a reduction gear, and is operable to drive the bogey
longitudinally of the guide rails 76 of the trolley 16 and along
the guide rails 35 of each mold.
19
33~
D48-2547-151
A pair of transverse guide rails 132 extend transversely
of the bogey 126. A transverse transportation carriage 134 is
mo~nted for movement along the transverse g~ide ralls 132. A
reversible drive motor 136 is connected to the carriage 134 by
means of a drive chain 138 and is operable to drive the transverse
transportion carriage to an fro along the guide rails 132 as
required in use.
The end 102 of the third umbilical cord 100 of the power
supply lines, which include hydraulic supply lines, is mounted on
the carriage 134.
As more clearly illustrated in Figure 6 and 7, a vertical
support shaft 138 is mounted for rotation in the carriage 134 and
extends downwardly therefrom. A sprocket 141 is mounted at the
upper end of the shaft 138 and is connected by means of a chain 143
to a sprocket 147 which is mounted on the output shaft of a
reduction gear box which is powered by a drive motor 145.
As shown in Figure 2 of the drawings, the shaft 138 is
connected to the shaft 140 by a flanged connection 142. A frame
144 is mounted on the shaft 140. A U-shaped guide track 146 is
formed in a side face 148 of the frame 144 and has oppositely
di-posed side faces 150 and 152. Sprockets 154 are mounted on the
frame 144 at each corner of the U-shaped track and at each free end
of the U-shaped track. Sprockets 156 and 158 are also mounted on
the frame 144. The sprocket 158 is a take-up sprocket which is
adjustable with respect to the frame 144. A drive sprocket 160 is
mounted on a drive motor 162. An endless chain 164 extends around
sprockets 154, 156, 158 and 160. The drive motor 162 is a
reversible drive motor so that it can be operated to drive the
chain 164 in either direction.
The chain 164 has portions of its length which are
coextensive with the U-shaped guide track and located centrally of
the U-shaped guide track.
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D48-2547-151
As shown in Figure 3 of the drawings, a track fol]ower
166 which is in the form of a roller is mounted in the guide track
146 in a close fitting free rotating relationship so that it may
rotate in ei~her direction when it bears against the side faces 150
or 152 of the channel. The follower 166 is proportioned so as to
be out of engagement with one of the side faces 150, 152 when in
engagement with the other. The track follower 166 is mounted on a
first slide member 168 by means of a mounting bolt assembly 170.
Referring once more to Figure 2 of the drawings, it will
be seen that a turntable generally identi~ied by the reference 172
has a backing plate 174 on which is mounted a face plate 178. The
backing plate 174 and the face plate 178 are mounted for rotation
on a shaft 176 which is supported by the frame 144. The turntable
172 is rotatable about the axis of the shaft 176 which extends at
right angles to the plane in which the guide track 146 extends.
A pair of guide rods 180 are mounted on the backing plate
174 of the turntable 172 in a spaced parallel relationship, one on
either side of a longitudinally elongated passage 182. The slide
member 168 is slidably mounted on the rods 180 for movement
radially of the axis of rotation of the turntable.
A second slide member 184 is mounted for longitudinal
movement with respect to the backing plate 174 of the turntable
172. Two guide rails 186 are mounted on the backing plate 174 and
extend longitudinally thereof in a spaced parallel relationship.
The second slide member 184 has a frame 187 which includes slide
blocks 188 which have recessed slipways 190 which slidably receive
the guide rails 186. The guide rails 186 have an enlarged rounded
outer edge which fits within the slipways 190 with the result that
while the frame 187 is free to move along the guide rails 186, it
is retained on the guide rails by the interlocking relationship of
the enlarged outer edges 192 and the recessed slipway 190. A cover
plate 194 is mounted on the frame 187.
D48-2547-151
Power is transmitted from the first slide 168 to the
second slide 184 by means of a power transmission system generally
identified by the reference numeral 195 which is illustrated in
Figures 2 and 4 of the drawings. The power transmission system
includes a first rack member 196 which is mounted on and protects
longitudinally from the first slide member 168. A second rack
member 198 is mounted on and extends longitudinally of the second
slide member 184.
A spacer block 200 is mounted on the backing plate 174
and support~ a plate 202 in a spaced parallel relationship with
respect to the backing plate 174. A shaft 204 is mounted for
rotation in bearings 206 and 208 which are carried by the backing
plate 174 and the face plate 202 respectively. Pinions 210 and 212
are keyed to the shaft 204 by means of a key 214 for rotation
therewith. The pinion 210 is meshed with the first rack 196 and
the pinion 212 is meshed with the second rack 198. The gear ratio
of the pinion 212 with respect to the pinion 210 is proportional to
the ratio of the proportions of the ~-shaped configuration of the
mold 12 with respect to the U-shaped configuration of the guide
track 146. Preferably, the ratio is of the order of 3 to 1.
To provide an underlying support Eor the second rack
member 148, rollers 216 are mounted on a support block 218 which is
secured to the backing plate 174.
In use, it will be seen that as the first slide member is
caused to reciprocate to and fro with respect to the turntable 72,
the second slide member 184 will be caused to reciprocate in the
opposite direction. It has been found that this form of rack and
pinion power transmission means provides a simple and inexpensive
mechanism for translating the movement of the follower 166 along
the guide track 146 into reciprocating movement of the second slide
member 184 which supports the workhead 220.
The workhead 220 consists oE a spray head 222 and a
chopper 224 which are mounted at the outer end of the second slide
member 184. A suitable dispenser for use in this application is
manufactured by Venus Products Inc. and is identified as an H.I.S.
chopper gun.
22
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D48-2547-151
A compactor roller 226 is mounted on the frame support
228 which is pivotally mounted on an arm 230 which is secured to a
further arm 232. The arm 232 is connected to the second slide
member 184 by means of a parallelogram linkage generally identified
by the reference numeral 234. An extensible ram 236 has one end
connected to the second slide member 184 and its other end
connected to the parallelogram linkage 234 such that the ram 236
can be extended to cause the roller 226 to be moved outwardly in
the direction ot the arrow 238 or contracted to move the roller in
a direction opposite to the direction indicated by the arrow 238.
Workhead Arcuate Movement Controls
The controls which control the length of arc of movement
of the workhead 220 and the speed of movement of the workhead 220
will now be described with reference to Figures 5, 6 and 7 of the
drawings. The controls which are generally identified by the
reference numeral 240 include a cam plate 242 and a switching block
assembly 244.
The cam plate 242 is keyed by means of a key 246 to the
shaft 176 upon which, as previously described, the turntable 172 is
mounted for rotation with respect to the frame 144. The cam plate
242 has two cam tracks 248 and 250 extending about its perimeter.
The cam tracks 248 and 250 are arranged side-by-side. The cam
track 248 has nodes 252 and 254 and a valley 256. The cam track
250 has a node 258. The nodes 252 and 254 oE the cam track 248
also extend across the cam track 250. Arcuate slots 260 extend
through the cam plate 242 in an arc generated from the access of
the shaft 176. Stop pins 262 each have a shaft portion 264 which
extends through a slot 260 and is threaded in the back plate
portions 266 of the node members 250, 252 and 254. The head
portions 268, 270 and 272 of the pins 262 cooperate with the node
members into which they are threaded to clamp one another in a
predetermined position with respect to the cam plate 242. It will
be noted that the head portion 272 has a portion 274 of reduced
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D48-2547-151
diameter which serves to provide a passage 276. The head portions
268, 270 and 272 have an axial length which is substantially equal
to the axial length of the cam tracks 248 and 250.
The switch block assembly 244 consists of a speed control
valve 278, reversing switches 280 and 282, and a shifter cylinder
284. The speed control valve 278 is in the form of an adjustable
hydraulic valve in which the rate of flow of hyraulic fluid through
the valve is controlled by the position of the plunger 286. sy
depressing the plunger 286, the flow through the valve 278 is
reduced. The valve 278 is connected through an inlet conduit 288
to a source of pressurized hydraulic fluid. The outlet conduit 290
is connected to the motor 162 through a reversing valve (not shown)
which is activated by a switches 280 and 282 to control the speed
of movement of the workhead 220. The reversing switches 280 and
282 are operable to reverse the direction of rotation of the motor
162. The reversing switches 280 and 282 each have actuator lever
arms 290 and 292 which have rollers 294 and 296 at their outer
ends. A roller 298 is mounted at the outer end of the plunger 286.
I'he shifter cylinder 284 is a double acting cylinder which is
operable to move the ram 288 between a position in which the roller
298 of the speed control valve 278 is aligned with either the cam
track 248 or the cam track 250. When the shifter is in a position
locating the roller 298 for movement along the cam track 248, the
rollers 294 and 296 of the reversing ~switches 280 and 282 are
aligned with the passage 276 formed in the head portion 272. The
cam track 248 controls the operation of the workhead when in use to
apply a coating to the side and bottom walls of the mold and a cam
track 250 is adapted to control the movement of the workhead when
it is applying a coating to the end wall of the mold. When the
shifter 284 is activated to move the roller 298 of the speed
control valve 274 into alignment with the cam track 250, the
rollers 294 and 296 of the switches are aligned with the inner
portion 272a of the head 274 so that they will be activated by
contact therewith.
24
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~48-2547-151
In use, when the side walls of the mold are to be coated,
the shifter cylinder 284 locates the switch block assembly 244 in
the position shown in Figure 5. When the cam plate 242 is
rotatably driven in the direction of the arrow 300, the speed of
operation of the drive motor 162 will be progressively reduced as
the roller 298 of the speed control valve 278 is moved radially
outwardly by travelling along the inclined surface of the node 252
and will be brought to a halt when the lever arm 292 of the
reversing switch 282 is located in the reversing position by
engagement with the head portion 270. The direction of rotation of
the motor 162 will then be automatically reversed to cause the cam
plate 242 to rotate in the direction of the arrow 302. The speed
of operation of the motor 162 will progressively increase as the
roller 298 moves down the inclined surface of the node 252 and will
continue at a substantially uniform speed of rotation ~ntil the
roller 298 reaches the valley 256 at which time the speed of
operation of the motor will be increased until the roller 298
emerges from the valley whereupon the motor 162 will operate at the
same speed at which it operated prior to encountering the valley
256. The motor 162 will continue at this speed until the roller
298 comes into contact with the node 254 at which time the speed of
operation will be progressivel~ decreased until the head portion
268 displaces the actuator lever arm 290 to a position which causes
the direction of rotation of the motor 162 to be once again
reversed. As previously indicated, the roller 294 oE the arm 290
will pass through the passage 276 which is formed in the head 272.
With reference to Figure 6 of the drawings, the lines 304 and 306
indicate the positions of the axis of the discharge nozzle 220 at
the point of reversal of direction of rotation of themotor 162.
When the workhead 220 is to be operated to apply a
coating to the end wall 32 of the mold as shown in Figure 7, the
shifter 284 is activated to align the roller 292 of the plunger 284
with the cam track 250 and as previously described, the rollers 294
and 296 will then be aligned with the head portion 272a of the head
272. The lines 308 and 310 which are shown in Figure 7 of the
3~5
D48-2547-151
drawings, indicate the outer limits of the arc of movement of the
workhead 220 between which the head 220 is caused to oscillate by
consecutively operating the reversing switches 280 a~d 282. The
head portions 270 and 272a serve to effect reversal of the
direction of movement of the motor 162 to control the reversal of
direction of the movement of the workhead. Similarly, the nodes
252 and 250 control the position of the speed control plunger 286
during arcuate movement of the workhead when the workhead is in the
second of its operating positions for applying a coating to the end
wall.
When the side walls of the mold have been coated and the
end wall is to be coated the applicator is relocated to assume the
position shown in Fig. 7 in which the workhead 220 is disposed so
as to coat a first portion of the end wall which extends from an
adjacent side wall. It will be understood that by reason of the
fact that the coating is applied by a spraying process the coating
which is applied to the end wall will be formed integrally with the
coating which is applied to the side wall. The workhead 220 is
relocated in the position shown in Fig. 7 by causing the bogey 126
to back up from the end wall 32 and by moving the transverse
transportation carriage 134 to one end of the transverse guide
rails 132 on which it is mounted. Simultaneously the motor 145 is
activated to rotate the shaft 140 through 90. The applicator is
then activated as previously discribed to apply a coating to the
end wall and moves through arc between the lines 308 and 310 as the
workhead is driven laterally with respect to the end wall 32 by
movement of the transverse carriage 134 along the guide rails 132
until the end wall of the mold is completely coated.
By reducing the speed of rotation of the motor 161 by
means of the nodes 250, 252 and 254, the thickness of the layer of
glass fibre reinforced plastic which is applied to the mold is
increased in the areas where the speed of movement of the workhead
is reduced. Similarly, by increasing the speed of the motor
162when the follower 198 is travelling along the valley 254, the
D48-2547-151
thickness of the coating which is applied to the bottom wall of the
mold is reduced. It has been found that there is an advantage to
be obtained by increasing the thickness of the coating in the areas
312. It is possible reduce the thickness of the top wall of the
molded shell because the roof of the does not require the same
structural strength as the side walls.
It will be apparent from the foregolng that by adjusting
the positions of the various nodes and heads of the cam assembly,
it is possible to control the operation of the spray head to
manufacture shells of different size and thickness. It will be
understood that in use, the workhead is manipulated to spray a
mixture of chopped glass fibre filaments and resin onto the wall of
the mold to form a shell 316. The shell 316 is formed with a
bottom wall 318 which will ultimately form the roof of the van
body, a pair of oppositely disposed side walls 320 and an end wall
322 which correspond to the coated areas of the mold.
Liner Inserter
Before the shell 316 is removed from the mold 12 in which
it is fGrmed, reinforcing liners and roof beams are positioned in
and secured to the shell. For the purposes of locating the liners
in the shell, a liner inserter 18 is provided and will now be
described with reference to Figures 8 to 15 and 18 of the drawings.
With reference to Figure 8 of the drawings, it will be seen that
the liner inserter 18 has a wheeled bogey 324 upon whichoppositely
disposed side frames 326 are pivotally mounted by means of hinges
328. Each frame 326 consists of a pair oE longitudinally extending
beam members 330, a plurality of spaced parallel beam members 332
extending between the members 330 and a further beam member 334
which is mounted on the inner face of the side frames 326 and
extends longitudinally thereof.
27
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3~5
D48-2547-151
As shown in Figures 8 and 9, the bogey 324 has a
plurality oE cylinder support frames generally identified by the
reference numeral 336 located at spaced intervals along the length
thereof. The cylinder support frames 336 each consist of a pair of
upright posts 338, a bridge member 340 and rigidifying struts 342.
A plurality of double acting jacking cylinders 346 each have one
end mounted on a bracket 344 supported by the bridge member 340.
The movable piston rods 348 of the cylinders 346 have their outer
ends secured to brackets 350 mounted on beams 334.
By activating the cylinders 346, it is possible to move
the side frames 326 between the toed-in configuration shown in
Figure 9 of the drawings and an upright position.
Pressure pads 352 and 354 are mounted on the side frames
326. As shown in Figure 10 of the drawings, the pressure pad 352
consists of a flat circular disk 356 which is mounted on a shaft
358 which has a head portion 360 at the other end thereof.
Passages 362 and 364 open through the beam 332. The passage 362 is
larger in diameter than the passage 364. A compression spring 366
has one end bearing against the disk 356 and its other end bearing
against the inner face of the wall of the beam 332 through which
the passag 346 extends. By applying pressure to the pad 356
through the spring 366, the spring 366 is free to yield to permit
relative movement of the pad 352 with respect to the beam 332.
The pressure pad 354 is of a similar construction to that
previously described with reference to Figure 10 with the exception
that the shaft 358 is longer than that of the pads 352. The lever
plate 372 is mounted on a shaft 374 which is pivotally mounted on
brackets 370. A passage 376 is formed in the lever 372 and the
shaft 358 extends through the passage 376. The head portion 360 is
proportioned so as to be larger than the passage 376. An actuator
lever arm 368 is mounted on the shaft 374 and can be releaseable
secured in the position shown in Figures 8 and 11 by means of a
hook 378 which is secured to the transverse beam 380.
3~5
D48-2547-151
To retract the pressure pads 359 the lever arm 368 is
pivoted to the position shown in Figures 8 and 9 and secured in
this position by the hook 378. To release the pressure pads 354 it
is merely necessary to disconnect the hook 378 from the lever arm
368 whereupon the compression spring 366 will reassert itself to
extend the pressure pads 354 to their full extent or to the extent
permitted by a reinforcing side wall located thereon in use.
The wheels 382 of the bogey 324 are retractable. The
wheels 382 are mounted on support plates 384 which are mounted on a
shaft 386. A sprocket 390 is mountd on the shaft 386 and is
connected to a sprocket 388 which is mounted on shaft 398 which has
a crank handle 392 at one end thereof. The sprocket 390 is
connected to the sprocket 388 by means of a chain 394 such that by
rotating the crank handle 392, it is possible to cause the wheel
support plate 384 to pivot in the direction of the arrow 396 so
that it is retracted inwardly of the frame of the bogey 324.
Roof Be_m Locater
For the purposes of strengthening the roof structure of
the shell, a plurality of roof beam members 400 (Fig. 8 and Fig.
12) is initially mounted on the inserter 18. Each roof beam 400
consists of an elongated U-shaped channel portion 402 which has
side flanges 404 projecting laterally thereErom. In the relaxed
configuration the roof beam~ 400 normally assume a shallow convex
curvature. This curvature is reversed prior to installation.
~ or the purposes of accurately positioning the roof beams
400, a plurality of L-shaped stop plates 406 are mounted on an
elongated rod 408 which is pivotally mounted in a plurality of
spaced boss members 410 which are mounted on the longitudinal side
beams 412 of the bogey 324. By rotating the handle 414, the stop
plates 406 can be pivoted to and fro in the direction of the arrows
416. Short alignment lugs 418 are mounted on the underside of the
side beams 412 and project downwardly therefrom so as to be
arranged one on opposite sides of the U-shaped channel section 402
of the roof beams 400 when correctly aligned.
29
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.
D48-2547-151
With reference to Figures 8, 9 and 18 of the drawings,
the reference numeral 420 refers generally to the roof beam biasing
mechanism which serves to initially support the roof beams 400 on
the inserter 18 in the position shown in Figure 9 of the drawings
in which they have a shallow concave curvature. The roof beam
biasing mechanism is supported from platforms 422 (only one of
which is shown) which are located at opposite ends of the bogey and
supported by longitudinal beam members 424. A guide rod 426 is
mounted on the beam members 424 and is located substantially
centrally of the length of the roof beam biasing mechanism 420 to
assist in maintaining alignment of the mechanism.
The roof beam biasing mechanism 420 consists of a pair of
spaced parallel beams 428 which are mounted on a piston rod 430 of
a jacking cylinder 432 which is operable to raise and lower the
beams 428. A plurality of clamping arm sets 434 is provided. Each
clamping arm set 434 consists of a pair of arms 436 and 438 which
are pivotally mounted on the longitudinal beams 428. The arms 436
have their upper ends pivotally mounted on a longitudinal beam
member 440 and the arms 438 have their upper ends pivotally mounted
on a longitudinal beam member 442. A bracket 444 ismounted on the
longitudinal beams 428. A first clamping cylinder 446 has one end
mounted on the bracket 440 and its other end mounted on an arm 438.
A second clamping cylinder 448 has one end mounted on the bracket
444 and its other end mounted on an arm 436. A tie member 450
extends obliquely between arms 438 and 434. Tension springs 452
extend between the arms 438 and a bracket 454 mounted on the beam
428. Similarly, tension springs 456 extend between the arms 434
and the bracket 458 mounted on the beam 424. The arms 436 and 438
have finger portions 460 and 462 projecting laterally inwardly from
the lower end thereof which serves to underly the side flanges 404
of the roof beams 400.
In use, the roof beam biasing mechanism is initially
positioned as shown in Figure 18 of the drawings and the L-shaped
stop plate 406 is position as shown in Figure 12 of the drawings.
The roof beams 400 are then inserted from the side of the trolley
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D48-2547-151
remote from the side rail 412 on which the stop plates 406 are
located and extend into contact with the stop plates 406.
Thereafter, the jacking cylinder 432 is activated to lift the
entire assembly including the center portion of the roof beams 400
to locate the roof beams 400 in the position shown in solid lines
in Figure 9. After the side and end wall reinforcing panels have
been inserted and the adhesive which is used to bond them to the
side and end wall of the shell is cured, the roof beams are
released. To release the roof beams the clamping cylinders 446 and
448 are activated to extend their associated pistons to cause the
arms 436 and 438 to pivot about their pivotal connection with the
beams 428. By moving one arm 436 all arms 436 are similtaneously
moved by reason of their connection to the beam 440 and similarly
by moving one arm 438, all arms 438 are moved by reason of their
connection to the beam 442. This action causes the fingers 460 and
462 to move outwardly away from their underlying position with
respect to the beam 400, thus releasing the beam 400 and permitting
it to spring outwardly to bear against the bottom wall of the
molded shell which will ultimately form the roof, to impart to it
an outwardly convex curvature after the shell has been removed from
the mold.
The inserter is transported into and out of the mold in
use by an overhead transporter (not shown) from which it is
suspended by means of chains 464 which are releaseably connected to
the beams 334.
For the purposes of positioning an end wall reinforcing
panel assembly 466 an end wall mounting frame 468 is provided. The
end wall mounting frame 468 includes a central section 470 and a
pair of side sections 472. The lower end portion 474 of the
central section 472 is downwardly and inwardly curved to a hinge
476 mounted on a transverse support 478. The central section is
movable between the inwardly toed position shown in solid lines in
Figure 14 and an upright position in which it will serve to locate
the end wall reinforcing panel 446 in an upright position.
415
D48-2547-151
A support from the lower edge of the end wall reinforcing
panel is provided in the form of a ledge 474 (Fig.14) which is
mounted on the side beams 412 and extends transversely
therebetween.
The side sections 472 are hingedly connected to the
celltral section 470 by means of hinges 476 for movement between an
inwardly folded shown at the right hand side of Figure 13 and a
coplanar position shown at the left side of Figure 13.
The centre section locating mechanism is generally
identified by the reference numeral 478 and consists of a hand
wheel 480 mounted on a shaft 482 which is rotatable in bearings
486. The bearings 486 are supported by beams 484 which extend from
the cylinder support frame 336 to the upright 488. A lever arm 490
is mounted on each end of the shaft 482 and a rod 492 extends from
each lever arm 490 and is pivotally mounted in a bracket 494 which
is mounted on the central section 468.
sy rotating the hand wheel 480 in the direction of the
arrow 496, the central section locating mechanism 478 is operable
to move the central section from the toed-in position shown in
solid lines in Figure 14 to an upright position shown in broken
lines. To facilitate the application of the torque required to
activate the hand wheel 480, a tubular extension 498 is provided
which may be fitted over any one oE the arms which project radially
from the hand wheel 480.
The side section locating mechanism is generally
identified by the reference numeral 500 and consists of a hand
wheel 502 mounted on a shaft 504 which is rotatable in a bearing
506. The bearing 506 is supported on the beam members 334. A
lever arm 508 is mounted on the shaft 504 for rotation therewith.
A link arm 510 has one end pivotally connected to the lever arm
508. The other end 512 is bifurcated and pivotally connected to
one end of a rod 514. The rod 514 is slidably mounted in an
elongated bearing sleeve 516 which is mounted on the beam 334. A
head portion 518 is threadedly mounted on the outer end of the
shaft 514.
D48-4619-1
When the hand wheel 502 is rotated, the rod 514 can be
moved between the retracted position shown at the right hand side
of Figure 13 and the extended position shown at the left hand side
of Figure 13.
With reference to Figure 8 o~ the drawings, it will be
seen that the side wall reinforcing panel 520 consists of a
generally flat rectangular panel 522 which usually made from
plywood and a plurality of stiffening ribs 524 which may also be
made from wood. The ribs 524 are secured to the panel 522 by means
of an adhesive or mounting screws or the like. A notch 526 is
formed at the lower end of each rib 524. The end reinforcing
panels are shown in cross-section in Eigure 13 and consist of a
rectangular panel 528 which has large rectangular spacer panels 530
located on the outer face thereof.
Removal of Relnforced Molded Shell from_Mold
l'he removal of the reinforced molded shell and the
mechanism for use in removing the shell is illustrated in Figure 16
and 17 of the drawings to which reference is now made. The
reinforced molded shell is generally identified by the reference
numeral 532 and as previously indicated, it consists of a glass
fibre rein~orced resin shell 316, side wall reinforcing panels 520,
an end reinforcing panel 528 ~Fig. 13) and roof beams 400.
The stripper mechanism 20 which is used for removing the
reinforced molded shell 532 consists of two sets of clamps 534.
Each set of clamps 534 consists of a first clamp 536 and a second
clamp 538 which are interconnected by a telescoping bridge rod
assembly 540. The bridge rod assembly 540 consists of a tubular
bar 538 in which a rod 541 is mounted to telescope. A centrally
located suspension cable 542 supports a pair of diverging side
cables 544 which extend to eyes 545 which are fixed to the first
and second clamp 536 and 538. Each clamp 534 consists of a pair of
oppositely disposed end plates 546 which are interconnected by
shaft 548 alld tube 552. Clamping arms 550a and 5S4a are mounted
on and welded to the tube 552. Clamping arms 550b and 554b are
pivotally mounted on the shaft 548 for movement toward and away
from arms 550a and 554a.
- 33
4~
D48-4619-1
Tubes 552 serve to space the arms 55Ua and 550b from the
arms 554a and 554b respectively. An actuator lever arm 556 is
pivotally mounted at the lower end of the lever arm 554a and a pair
of links 558 are connected to the actuator lever arm 556 at one end
and to the lever arm 554b at the other end such that by moving the
actuator lever arm 556 from the position shown in Figure 17 in the
direction of the arrow 560, the lower end of the lever arm 554b is
moved toward the lower end of the fixed lever arm 554a to
simultaneously cause the lower end of the clamping arm 550b to move
toward the lower end of the clamping arm 550a. By reversing the
direction of movement of the lever arm 556, the clamping arm 550b
is returned to the open position. When the lever arm 556 moves in
the direction of the arrow 560, the pivotal connection between the
lever arm 556 and the links 558 will move to the centre line
position 562 in which position it is below the pivot 564 and is
therefore beyond a top dead centre position. The shoulders 566
which are located at the lower end of the arm 554a serve to limit
the movement of the link arms 558 to a short distance beyond the
top dead center position.
The clamping arms 550 have an upper set of clamping ~aws
568 and a lower set of clamping jaws 570 which are arranged
opposite one another.
In use, the clamps 534 are located so that the lever arms
554a and 554b are accessible from the interior of the reinforcing
panel 520 while the clamping arms 550a and 554b extend between the
reinforcing panel 520 and the molded shell 532, one on either side
of a rib 524. By moving the actuator lever 556 between the
position shown in Figure 17 and the position shown in Figure 16,
the clamping arm 550a and 554b are caused to clamp a rib 524 such
that the jaws 568 and 570 will bite into the rib 524 to be secured
thereto.
The hoist mechanism which may be in the form of a
conventional chain hoist is then operated to raise the suspension
cables 542. When the suspension cable 542 is raised the force
which is transmitted to the clamps 534 through the diverging side
cables 544 tends to pull the clamps 534 inwardly and upwardly and
this action facilitates the removal of the side walls of the shell
34
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D48-2547-151
from the mold and continued lifting causes the reinforced molded
shell 532 to be removed from the mold 12.
Fitting of End_Ca~
As shown in Figures 19 and 20 of the drawings, after the
reinforced molded shell 532 has been removed from the mold, the
free end 572 is trimmed to the required length and a prefabricated
end cap 574 is mounted thereon. As shown in Figure 20 a layer of
adhesive 576 is applied to the interior of the inner wall 578 of
the end cap and the marginal edge of the end 572 of the shell and
the adhesive 578 are sandwiched between the wall 578 of the end cap
and a wooden insert 580 to secure the end cap 574 in position.
Trans~ortation System
The transportation system used for transferring the
reinforced molded shell 352 from any one of the molds 12 to the
trimming station 22 is illustrated in Figures 21 and 22 of the
drawings to which refererlce is now made. The transportation system
includes an overhead rail system 24 which includes a first guide
rail 582 located above and extending longitudinally of each mold
12. The first guide rails 582 extend over the full length of each
mold 12 and project a substantial distance outwardly therefrom.
Second guide rail segments 584 are spaced from one another and
aligned in series to extend from adjacent the end of the guide rail
582 which extends from the mold 12 which is located furthest from
the trimming station 22 to the trimming station 22. The guide
rails 582 and 584 are in the form of I-beams along which wheeled
support blocks 586 may run. Switch plate assemblies 588 and 590
are provided at the junctions between the rails 582 and 584.
A switch plate assembly 590 is illustrated in
cross-section in Figure 22. A switch plate assembly 590 consists
of a support plate 592 which is mounted on a shaft 594 for rotation
,
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D48-2547-151
with the shaft 594. The shaft 594 is supported from an overhead
support beam 596 for rotation in a bearing 598 about a verticalaxis
600. A drive motor 602 is drivingly connected to the plate 592 by
means of a chain 604 and is operable to rotate the plate 592 as
required in use. A first straight rail segment 606 is mounted on
the underside of the support plate 592 and extends diametrically
across the plate 592. A pair of curved segments 608 and 610 are
also mounted on the underside of the support plate 592 and extend
in an arcuate path to the perimeter of the support plate 592.
The switch plate 588 is the same as the switch plate 590
with the exception that there is no requirement for the curved
segment 608.
In use the drive motor 602 can be activated to align the
straight segment 606 with the second guide rail segments 584 or to
align the curved segments 608 or 610 with the first guide rail
segments 582 and 584 as required in use to provide for the passage
lining inserter frame or the stripper mechanism along the guide
rails into and out of the molds and to and from the molds and the
trimming station as required in use.
Trimminq Station
_ . _ . _ . . . . . . . . _ .. .
The trimming station will now be decribed with reference
to Figure 23 of the drawings.
The trimming station 22 is in the form of an enclosure
having side walls 612 and a base 614. Slipway pads 616 (Fig.24)
are positioned on the base 614 to underlie the reinforced molded
shell 532 and form a slipway upon which it can rest and along which
it can be moved without damaging the exterior finish of the roof.
Two drill jigs 618 (only one of which is shown) are arranged one on
either side of the trimming station and have drill alignment
passages 620 extending therethrough. A further drill jig 622 is in
the form of a movable frame 624 which has wheels 626 which are
guided along guide rails 628. Two double acting drive cylinders
630 have one end connected to the frame 624 and their
4~i
D48-2547-151
other end connected to the base 614 such that by expanding and
contracting the cylinder 630, the frame 624 can be caused to move
from the position shown in solid lines in Figure 23 to a position
in which it will displace the closed end of the reinforced molded
shell 532 in the direction of the arrow 631 to the position shown
in broken lines at 633. The drill jig 622 has a pair of U-shaped
frame members 632 which are shaped to receive the closed end of the
reinforced molded 532 in a close but free fitting relationship.
Guide arms 634 project upwardly and are flared outwardly from the
ends of the upper U-shaped frame member 632. The inner face of
each guide arm 634 is lined with a resilient pad 638. Bumper pads
636 are also positioned on the upper U-shaped frame member 632. A
plurality of drill jig plates 640 each having a drill guide hole
642 extend between the rails 632 and are positioned at the required
location of an opening to be formed in the molded shell 532 for the
purposes of mounting light fixtures or the like. A conventional
hand drill 644 is provided for the purposes of drilling the
required holes through the drill hole guide passages 642.
A walk platform 646 is supported in a horizontal plane on
support posts 648 which are an integral part of the movable frame
624. The walk platform 646 provides an elevated platform upon
which an operator may stand when trimming the molded shell 532
along the trim line 650. Walk platforms 652 are hinged to support
brackets 654 which are mounted on the side wall 612 and can be
supported in the operable position by means of tie rods 656. The
tie rods 656 can be released from the brackets 654 to permit the
platforms 652 to fold downwardly to lie flat against the side wall
612 to provide increased clearance within the trimming station to
facilitate the initial positioning of the reinforced molded shell
532.
For the purposes of trimming the molded shell 532 along
the upper side cut lines 658, a side rail assembly 660 is provided
at each side of the trimming station. Each side rail assembly 660
comprises a guide frame 662 which consists of a pair of spaced
parallel guide rails 664 which are connected to one another by
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D48-2547-lSl
support plates 666 and tie bars 668. The guide frames 662 are
suspended in the trimming station 22 on chains 670 which extend
over sprockets 672 and 674 and have a counterweight 676 at the
either end thereof. The counterweights 676 serve to counterbalance
a sufficient proportion of the weight of the side rail assembly to
permit the side rail assembly to be manually raised or lowered with
each. The sprockets 672 are connected to one another by means of a
shaft 678 which serves to maintain the horizontal alignment of the
guide rails 664.
Stop pads 680 are positioned on the inner face of the
support plates 666 and serve to bear against the side walls of the
shell 532 to space the rails 664 outwardly therefrom in use.
Vacuum cups 682 are mounted on each support plate 666 and are
connected to a suitable vacuum source which can be activated as
required to serve to secure the vacuum cup 682 with respect to the
side walls of the mold and thereby firmly anchor the guide rails
640 in the position required for trimming. A slide 684 is slidably
mounted on the guide rails 664 and supports the trimming tools and
trimming aids which include a cutter 686, a drill 688 and a
wheelwell templet 690.
By manually sliding the slide 684 along the length of the
guide rails 664 when the cutter 686 is activated, the cutter 686
will cut the e~cess material away from the molded shell 532 along
the cut line 658.
The slide 684 can also be positioned to locate the wheel
well templet 690 in the required position to permit an operator to
inscribe a line 692 along which a wheel well cut may be made by
means of a manually held cutter.
Floor Mountin~
A floor assembly 694 (Fig. 24) is preassembled in an
assembly station which is remote from the trimming station and is
transported to the trimming station by a suspension assembly 696
38
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D48-2547-151
which is supported by a block and tackle 698 which is mounted on a
wheeled carriage 700 which is freely movable along a guide rail 702
which extends normal to the guide rail 584.
As shown in Figure 25 of the drawings, an end cap 523 in
the form of a plastic extrusion is mounted on the upper edge of the
panel 522 and has a flanye 525 at its upper end. The end cap 523
extends about the upper edge of the panel 522 and the upper edge of
the end panel 528.
The floor assembly 694 includes floor 704 and an angle
bracket 706 which extends about the perimeter of the floor 704 and
is secured thereto by means of mounting screws 708.
The floor assembly 694 is positioned as shown in Figures 24 and 25
of the drawings so that it rests on the upper edge of the
reinforcing support panels inwardly of the glass fibre resin
reinforced shell 316. A bumper rail 710 is then positioned on the
outer face of the shell 312 in alignment with the floor 704 and
angle bracket 706. Drill holes are then formed in the bumber rails
710, shell 312 and angle bracket 706 and floor 704, using the drill
688 which is mounted on the slide 684 and mounting screws 712 are
threaded into the drill holes thus formed to secure the floor 704
and bumper rails 710 with nespect to the shell 316.
After the floor assembly 694 has been positioned as
described above, the suspension assembly 696 is released and
returned to the floor assembly station to receive a further floor
assembly.
Body Ri~htin~ Mechanism
The body righting mechan sm 26 will now be described with
reference to Figures 24 to 31 of the drawings.
The body righting mechanism 26 consists of a pair of
hoists 714 which are mounted on carriages 716 which are movable
along the support rail 584. A chain 718 extends downwardly from
each hoist and is connected to the upper end of an L-shaped support
B~3o~
D48-2547-151
column 720. A beam 722 is mounted on a shaft 724 which is mounted
for rotation in the lower end of each support column 720. The beam
722 functions as a rotor which rotates with the shaft 724 and has
arms 726 projecting outwardly from the shaft 724. A brake disk 728
is mounted on one of the shafts 724 for rotation therewith. A
brake pad assembly 730 is mounted on the support column 720 in an
operable relationship with respect to the brake disk 728 and is
operable to apply a braking torque to the brake disk 728 to lock
the rotor in any required position.
A damper assembly 732 is provided for each rotor. The
damper assembly includes a lever arm 734 mounted on each shaft 724
and projecting radially outwardly therefrom, a double acting
hydraulic cylinder assembly 736 and a fluid reservoir 738. The
conduit 740 has one end communicating with one end of the cylinder
736 and its other end communicating with the fluid reservoir 738.
The conduit 742 has one end communicating with one end of the
cylinder 736 and its other end communicating with the reservoir
738. The conduits 740 and 742 connect to opposite ends of the
cylinder 736 on opposite sides of the piston which is mounted
therein. The flow control valves 741 and 743 which are located in
the conduits 740 and 742 can be independently adjusted to control
the speed of rotation of the rotor and to achieve a uniform damping
at the front and back end of the body to avoid twisting of the body
when it is being righted. By restricting the flow of fluid from
the cylinder 736, it is possible to limit the speed of rotation of
the lever arm 734 and therefore the speed of rotation of the rotor
assembly to prevent an excessive speed building up when the brake
730 is released to permit the body to turn right side up under the
influence of its own weight.
For the purposes of securing the container body to the
arms 726 of the rotor, mounting assemblies 744 and 746 are
provided. Mounting assemblies 744 are constructed so as to be
suitable for use in passages opening through the end wall of the
body 532 and the mounting assemblies 746 are suitable for use in
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D48-2547-151
association with passages opening through the side walls of the
body 532.
A mounting assembly 746 will now be described with
reference to Figures 26, 27 and 28 of the drawings. I'he mounting
assembly 746 is attached to the outer end portion 748 of the arm
726 by means of a mounting bracket 750. A boss 752 is mounted on
the bracket 750 and has a bore 754 opening therethrough. A sleeve
756 is slidably mounted in the bore 754. An L-shaped bracket 758
is formed with a passage 760 through which a stem 762 extends. The
bracket 758 is welded to the sleeve 756. A V-shaped notch 764 is
formed at the outer end of the L-shaped bracket 758. An alignment
pin 766 is welded onto the bracket 758 and projects outwardly
therefrom. A guide block 768 is mounted at the outer end of the
stem 762 and has a sleeve member 770 projecting therefrom in which
the alignment pin 766 of the bracket 758 is slidably mounted to
telescope therein. A rocker arm assembly 772 is pivotally mounted
on a pivot pin 774 which is mounted in the guide block 768. An
L-shaped lever arm 776 is mounted on a locker arm 772 and projects
radially outwardly from the pivot pin 774. Rollers 778 are
mountedat one end of the rocker arm 772 and a pair of link arms 780
have one end pivotally connected to the other end of the rocker
arms 772 by means of a pivot pin 782. The other ends of the link
arms 780 are pivotally connected to the boss 752 by means of a
pivot pin 784.
The circular disk 786 is mounted at the other end of the
sleeve 756 and a resilient annular collar 788 is mounted on the
outer face of the disk 768. A tapered plug 790 is mounted at the
outer end of the stem 762. The plug 790 has a side face 792
proportioned to fit in a close fitting relationship within the
collar 788.
When the mounting assembly 746 is located in the position
shown in Figure 26 of the drawings, the plug 792 is out of
engagement with the collar 788 so that the diameter of the collar
788 is at a minimum and is proportioned to fit freely within the
41
~, ~d f ~ ag 5
D48-2547-151
passages 794 formed in the shell 532. Movement of the lever arm
776 from the position shown in Figure 26 through the position shown
in Figure 27 to the position shown in Figure 28, causes the disk
786 to initially move toward the passage 794 to locate the sleeve
788 in the passage 794 and subsequently retracts the plug 790 into
the collar 788 to cause the collar 788 to expand radially outwardly
into engagement with the perimeter of the passage 794.
As shown in Figure 26 of the drawings, spacer arms 794
are located one on either side of the plug 790 and project
outwardly therefrom when the plug 790 is in its retracted position.
Resilient bumper strips 796 are located on the outer faces of the
arms 794.
The mounting assemblies 744 illustrated in Figure 29 of
the drawings have a number of components which are identical to
those of the mounting assembly 746 and are therefore identified by
like numerals. Because it is not necessary to retract the disk
786, the assembly 744 does not include the sleeve 756, the boss 752
and the link arms 780.
By rotating the lever 776 between the position shown in
Figure 29 and the position shown in Figure 30, it is possible to
expand the collar 788 into the passage 794. When the handle 776
are in the positions shown in Figures 28 and 30, it will be noted
that the rollers 778 are located on the opposite side of the stem
762 to the handle 776 with the result that the lever arms 776 are
beyond a top dead center position and will remain locked in this
position under the influence of the forces applied to the plug 790
which are tending to drive the plug outwardly of the collar 788.
When the body 800 ~Fig. 31) has been completely assembled
and mounted on the body righting mechanism 26, it is hoisted to be
raised from the support pads 616 of the trimming station and is
then moved out of the trimming station along the rail 584 to a
position located above a chassis 802 (Fig. 31) onto which it is to
be mounted. When it is located above the chassis 802, the brake
730 is released and the body 800 is allowed to rotate to a right
42
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D48-2547-151
side up position and is then lowered onto the chassis 820
and secured thereto in a conventional manner.
Method of O~eratlon
Air Circulation System
. ~
sefore the spraying operation is initiated, the air
circulation system is activated by activating the air extraction
blower 60 and providing a fresh air supply through the discharge
passages 62 so that air is circulated through each of the molds 12
as previously described.
M_ldin~ Operatlon
The mold 12 in which a shell is to be formed is prepared
by masking off the portion of the surface of the mold to which the
glass fibre reinforced resin is not to be applied using a
conventional masking material such as craft paper or the like. A
gel coat is then applied to the surface of the mold which is to be
coated with the glass fibre reinforced resin.
The transfer trolly 16 is then positioned opposite the
open end of the mold which is to be coated and the latching
mechanism 80 is activated to align the guide rails 76 of the trolly
16 with the guide rails 35 of the mold as illustrated in Figure la
of the drawings. The operator then activates the motor 128 to move
the carriage 120 off of the trolly 16 into the mold 12 to position
the nozzle 222 in the plane in which spraying is to be initiated.
The motor 162 (Fig.2) is then activated to cause the
turntable 172 to travel back and forth about the arc illustrated in
Figure 6 of the drawings to thereby cause the nozzle 224 to follow
the path of travel indicated by the broken line 221.
Simultaneously, the motor 128 continues to be driven to move the
workhead assembly 220 along the length of the mold so that as a
43
D48-2547-151
result of successive passes, a layer of glass fibre reinforced
resin is applied to the side and top walls of the mold and is
compressed by the compression roller 226 to provide a compact
layer. As previously indicated, the thickness of the layer which
is deposited is determined by the speed of movement o~ the workhead
with respect to the wall of the mold and this speed can be adjusted
by providing nodes such as the nodes 254 on the cam plate 242. In
addition, the length of the arc through which the workhead 220 is
permitted to travel can be adjusted by adjusting the position of
the pins 262 in the slots 260 (Fig.5).
After the side walls and bottom wall of the mold have
been coated, the motor 128 is reversed so as to move the bogey 126
away from the end wall 32. The motor 142 is then activated to
rotate the frame 144 through 90 to direct the workhead 220
toward the end wall 32. Simultaneously, the shifter cylinder
284 (Fig.5) is activated to move the switching block assembly 244
so that the roller 298 is aligned with the cam track 250. When the
turntable is then activated to move the workhead with respect to
the end wall 32, the movement of the turntable is restricted to
that required to move the workhead 220 in the arc illustrated in
Figure 7 of the drawing.
It will be noted that a work platform 122 is provided on
the carriage 120 and an operator works from the platform as the
carriage moves along the mold 12 and is able to observe the quality
of the work which is being performed by the applicator. The
operator may have a manually operable roller available to him so
that he can manually roll out some of the coating if there is any
indication that such additional rolling is required. It may from
time to time be necessary to undertake this type of manual rolling
out to the portions of the mold adjacent the upper edge of the
coating which is applied simply to prevent the thin upper edge from
falling away from the wall of the mold.
D48-2547-151
After coating has been completed, the carriage 120 is
withdrawn from the mold onto the transfer trolly 122 and the
transfer trolly is uncoupled from the mold and is driven along the
guide path 42 to the next mold which is to be coated and the
foregoing process is repeated.
Preferably, the thickness of the coating which is applied
is of the order of about 0.1 inches.
The shell which is formed is then allowed to cure. A
curing time of about forty minutes is usually required to ensure
that the shell is sufficiently cured to permit mounting of the
reinforcing liners on the walls of the shell.
The liner inserter is initially set up as shown in Figure
8 of the drawings with the wheels 382 in the lowered position and
the side and end support frames toed inwardly. The side wall
reinforcing panel 520 and end wall reinforcing panel 66 are mounted
as previously described and the roof beams 400 are inserted and
arched upwardly as previously described. The wheeled bogey 324 is
then wheeled to a position aligned with the open end of the mold
into which the liners are to be inserted and it is then raised by
an overhead block and tackle mounted on the rail 582 above the mold
in which the inserter is to be located. The wheels 382 are then
retracted by operating the crank handle 392. A suitable adhesive
is applied to the outer face of the reinforcing ribs 524 and the
entire assembly is operably positioned in the shell which is to be
reinforced. The cylinders 346 (Fig.9) are then activated to move
the side frames 326 outwardly to press the side wall reinforcing
panels 520 into engagement with the molded shell. The roof beam
biasing mechanism 420 is activated, after the side wall and end
wall reinforcing liners are securely bonded to the side and end
walls, to release the roof beams 420 to permit them to move into
engagement with the bottom wall of the molded shell. The roof
beams 420 are also preferably coated with a suitable adhesive so
that they will be bonded to the bottom wall of the shell.
Preferably, the roof beams 400 will assume an outwardly convex
configuration when the shell is removed from the mold. As
~39,~a~5
D48-2547-lSl
previously indicated, before the side wall reinforcing panels are
positioned on the support frames 326, the pressure pads 354 are
moved to their retracted position. After the side wall reinforcing
panels 520 have been positioned against the side walls of the
shell, the pressure pads 354 are released to move into engagement
with the side wall reinforcing panels 342 to press them against the
shell.
The end wall reinforcing panel 466 is then operably
positioned against the end wall by moving the central section 470
outwardly toward its upright position by activating the hand wheel
480 and thereafter the side sections 472 are pivoted outwardly to
bear against the end wall panel 466 by operating the hand wheels
502.
The lining inserter is retained in the mold for a period
of time sufficient to permit the adhesive to be effective to secure
the reinforcing liners to the shell. Generally, no more than a few
minutes is required for this curing of the adhesive to take place.
Thereafter, the end and side support frames are collapsed to their
inwardly toed position and the frame is hoisted and removed from
the mold, the wheels are lowered and the frame can then be released
from the hoist and wheeled to a workstation in which the next set
of side and end reinforcing panels and roof beams are operably
located thereon.
The next step in the manufacturing procedure is to
removed the reinforced molded shell S32 from the mold and this is
achieved by the mold extractor 20 as previously described. The
clamps 534 are attached to the ribs 524 and the assembly is hoisted
out of the mold, as illustrated in Figure 16 of the drawings. This
assembly is then transported from the mold 12 in which it is formed
along the guide rail 582 to the guide rail 584 and into the
trimming station 22. In the trimming station 22, the shell is
trimmed as previously described with the aid of the side rail
assembly 660 and the various drill holes are formed in the
positions dictated by the various drill ~ig passages which are
provided.
46
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D48-2547-15l
The floor assembly is then mounted in the open end of the
trimmed body and is secured thereto as illustrated in Figures 24
and 25 of the drawings.
Thereafter, the body righting mechanism is mounted on the
body and the body is transported out of the trimming station to a
body xighting station in which it is turned right-side-up and
positioned on the chassis of a vehicle as illustrated in Figure 31.
From the foregoing it will be apparent that the present
invention provides a complete method and apparatus for use in the
manufacture of unitary glass fibre reinforced plastic container
bodies which is capable of operating at high speed and with a low
manual labour input requirement.
It has been found that one applicator 14 can operate at a
sufficiently high speed to coat up to seven molds without occupying
more than 90~ of the operating capacity of the applicator. It will
of course be understood that the number of molds which can be
utilized without employing more than 100% of the work capability of
the applicator is a function of the size of the molds.
Various modifications of the present invention will be
apparent to those skilled in the art.
For example it will be apparent that the movement of the
applicator reguired to form a coating on the walls of the mold may
be achieved by mounting the spray head and roller on an arm of a
programmable industrial robot which may be transported along the
mold on a carriage similar to the carriage 120.
In addition it will be apparent that the floor assembly
can be mounted on the body after it has been turned right side up.
These and other variations and modifications of the
present invention will be apparent to those skilled in the art.
47
