Note: Descriptions are shown in the official language in which they were submitted.
8335S
BACKGROUND O~ TIIE INVENTION
~, In a conventional Hartord I . S . type of glassware
forming machine a plurality of independent, or individual
sections, are operated in timed relationship to one another,
and each such section receives gobs of molten glass from a
feeder, the gobs being received at the blank side, or station,
of each machine section usually in upwardly open blank or
parison molds. Preliminary parisons are formed, usually in
an inverted orientation in these blank molds, being subsequently
swung over to the blow side for final forming in the blow molds.
A neck ring mold cooperates with the blank mold at the blank `
side to form the parison, and moves with the parison to support
it during transfer to the blow side of the section. Various
components within each machine section act upon the parison
at the blank and the blow stations, and all of these components
including the neck ring transfer mechanism are operated under
the control of a conventional timing device.
, ~ .
The reader is referred to any of the disclosures inthe many patents issued on the timing features of a typical
20 glassware forming machine of this type, and more particularly ; r
to the Ingle Patent No. 1,911,119 for a more detailed discussion
of these features of a conventional Hartford I.S. type glass-
ware forming machine.
Both the blank and the blow molds each include two ;
mating half sections which are mounted on mold holder arms in ,~
the conventional machine. The conventional arms are carried
on a common hinge pin and are movable by a fluid motor through
a suitable linkage under the control of the timing device.
1~ However, these pivotally mounted mold arms have disadvantages,
some of which are related to the differences in degree of mold
opening provided between a double or triple gob machine
configuration. That is, the mold halves adjacent the hinge
~ L
, .
.. . ..
. : : - ., :, .
108 3 35 5
pin necessarily open less than do those more remote from the
hinge pin. Simply increasing the angular travel of the pivot-
ally mounted arms cannot be tolerated in an already over-
crowdèd machine due to space limitations within each of the
machine's several side-by-side sections.
Another disadvantage to the conventionally mova~le
mold halves is related to the requirements for cooling the
molds. Fixed cooling air towers are currently used so that -
the molds move through a continuous "wind'` or air flow pattern
in the conventional machine. This approach to cooling is not
only wasteul, in terms of cost of cooling the machine, but is
also quite noisy and difficult to achieve the desired temper-
ature distribution at the forming surface of the mold.
Among the objects of f~he present invention are to
eliminate the arcuate or pivotal mold motion about the vertical
hinge pins at both the blank and the blow stations in order to
provide more space in each individual machine section not only
for the molds themselves but also for an improved mold cooling
system. Eliminating the hinge pin, and its pivotally movabl~
mold arms, also eliminates other shortcomings of the prior
art such as limitations to the closing forces attainable,
- Accordingly, these objects of the present invention
are achieved in this disclosure by providing fixed horizontal
guide rods, or ways, in place of the vertical hinge pins in a
conventional Hartford I.S. type of glassware forming machine.
More particularly, the mold halves of the present disclosure
are provided on mold holder structures which are slidably
mounted on these ways, and an internal chamber is de~ined in
each mold structure, each such chamber having an inlet opening
in continuous communication with a cooling air source located
. .. ... . . ............................................ . .
; . ~ . .
.. . . . . .
8335S
in the fixed frame of the machine section. The in-line mold
motion of the present invention not only provides for more
uniform cooling of all portions of all molds, especially in a
double or triple gob configuration, but also permits the
achievement of higher and more effective mold closing forces as
a result of the direction for these forces being normal to the
parting line of the mold halves.
A more specific advantage to the present invention
can be related to the achievement of the foregoing aims, that
is to providing in-line mold motion in a Hartford I.S. type of
machine, with extensive use being made of existing components
in carrying out the necessary modifications to such a machine
section. For example, the same mold opening motors are used,
and the conventional linkage for oscillating the lower ends of
the vertical rock shafts are also employed. me toggle links '
for connecting the upper ends of these shafts to the mold
' holder structure while not identical to those in the conven-
tional I.S. machine, are nevertheless quite similar in function
in that they achieve equal but opposite displacement of the
associated mold holder structures.
In accordance with a specific embodiment, there is
provided, in a glassware forming machine of the type having
several side-by-side sections with components operable in
timed relationship to one another, each such section including
a blow mold station having generally cylindrical split blow
mold segments individually mounted on movable mold holder means,
the improvement comprising chambers defined by each of said
mold holder means, means for providing cooling air to said
chambers, each of said mold holder means including vertically
spaced mold holder arms, and structure mounted between said
arms, said structure having an inner wall defining nozzle
~ _ 3 _
1~833SS
openings which are generally tangential to, and thereby create
a circulatory flow of cooling air around, the cylindrical
split mold se~ments.
The invention will now be described with reference
to the accompanying drawings which show a preferred form
thereof and wherein:-
Fig. 1 is a composite over-view of Figs. lA and lB,
and shows in plan view the blank and blow sides, respectively,
of a Hartford I.S. type machine section modified in accordance
with the present invention.
Fig. 2 is a vertical sectional view taken generally
on the line 2A-2A and 2B-2B of Figs. lA and lB respectively.
is view is also a composite view and illustrates in verti-
cal section the blank and blow sides, respectively, of a
typical Hartford I.S. type machine modified in accordance
with the present invention.
.
- 3a -
.. . .
... .
1083355
Fig. 3 is a vertical sectional view taken gener~
on the line 3-3 of Fig. 2A and shows ~he mold holder structure
on the blank side of ~he Yig. 1 machine.
Fig. 4 is a horizontal sectional view taken generally
on the line 4~4 of ~ig. 3.
Fig. 5 is a vertical sectional view taken generally
on the line 5-5 of Fig. 2B and shows the mold holder structure
on the blow side of the Fig. 1 machine.
Fig. 6 is a horizontal sectional view taken generall~
on line 6-6 of Fig. 5.
Fig. 7 is a horizontal sectional view taken generally
on line 7-i of Fig. 5.
Fig. 8 is a horizontal sectional view taken yenerally
on line 8-8 of Fig. 5.
Fig. 9 is a horizontal sectional view taken generally
on line 9-9 of Fig. 5 and also illustrates the vertical inter-
face between the movable mold holder structures and the fixed
frame of the machine at the blow side.
Fig. 10 is a horizontal sectional view taken generally
on line 10-10 of Figs. 2A and 2B, but this view is shown to a
slightly reduced scale and illustra~es in plan view the Hartford
I.S. machine's conventional linkage and air motors for oscilla-
ting the lower ends of the vertical rock shafts depicted in
Fig. 1.
DE~AILED DESCRIPTION
Prior to considering the drawings in detail i~ might
be well to summarize briefly the operation of a typical
Hartford I.S. type of glassware forming machine. In such a
machine, molten glass gobs are delivered through fixed chutes
to the various sections of such a machine. Typically, six
to eight such sections might be fed from a single molten
glass gob feeder, which produces the yobs at the downstream
end of a molten glass forehearth furnace. Each machine section
comprises a self~contained unit which includes a blank mold
~ 083~SS
station and a blow mold station. The molten glass gobs are
formed into parisons at the blank station, and then kransferred
to the blow station by a neck ring mechanism which includes
a neck mold. The neck mold normally mates with the blank mold
at the blank station, and also serves to support the parison
during transfer to the blow station.
Blank molds have been made either solid, or of -the
split type, both types being adapted to mate with the neck
mold or with an intermediate mold. The neck mold is generally
of the split type, and is usually annular in configuration
with a central opening to receive a vertically reciprocable
plunger. The plunger presses the gob upwardly into the
inverted blank mold in the "press and blow" process, or the
plunger may be associated with a thimble to permit the parison
to be formed by a "blow and blow" process. This latter process
provides for counter-blow air at the blank station i-n addition
to the final blow air at the blow station.
The glàss gobs are formed at a rate determined by
the machine operator, and these gobs are fed through a
distribution system to the various blank mold cavities in
each of the machine sections. Each blank cavity is upwardly
open and a funnel is provided to move in onto the closed blank
mold for guiding the gob into such cavity. The gobs, two in
number in a double gob machine, drop through the funnels, into
the cavity, and into the neck mold, which neck mold is always
closed except for a short time at the blow station for release
of the parison. In the process of forming the parison at the
blank station the gob is settled into the neck mold to form
the finish portion of the glassware article. This is
accomplished in the usual "blow and blow" process by bringing
a baffle downward onto the funnel, and providing air to the
baffle ~or settling the charge in the blank mold. If no funnel
83355
is used in loading the gob, the baffle may move directly
in on top of the blank mold. The plunger then moves downwardly
away from the neck of the parison allowiny the heat of the
glass to stabilize in this part of the parison. This softens
the inside glass surface by internal conduction, at least in
the area where the plunger tip has caused it to cool during
the preceding step. If counter-blow air is utilized, it will
~urther soften this area of the parison. Whether counter-blow
air is used or whether a plunger is raised upwardly into -the
parison in ~he "press and blow~' process the gob will be expanded
to fill the upper regions of the blank cavity defined by the
blank mold and by the baffle. Once the parison has been so
formed the split blank mold is ready for opening. The blank
mold itself, and the means for opening the same, will be
described in greater detail hereinafter.
With the blank mold opened, the parison is- not in
contact with any mold parts, except for the neck mold. Thus,
heat is stored in the relatively thick walled parison, and will
tend to raise the temperature of its surfaces. The neck mold
comprises two annular segments mounted on each of two neck ring
arms, which arms swing about a horizontal axis intermediate
the blank ànd blow stations such that the "up side down" parison
is rotated as it is moved out of the blank side, and assumes ;~
an upright position at the blow side o~ the machine. The blow
mold closes around the parison, and around the bottom pla-te
which is spaced below that end of the parison opposite its
neck or open end. The blow mold usually has an upper edge
portion which supports the parison from just below its finish,
allowing the neck mold to be opened prior to revert or return
movement of the neck ring mold back to the blank side. The
neck ring mold recloses during return movement so that the
blank mold can again close around it once the neck mold has
returned to the blank side.
-6-
` ` 101~33S5
, The parison is blown at the blow side of the machine,
but the finish portion of the ware will have been formed by
the neck mold and will not change shape. Final blow air is
delivered to the interior of the parison through a blow head
which moves down onto the top of the closed blow mold. The
blow mold then opens and take out tongs, in an open con~iguration
are swung into the blow station where the tongs close around
the newly formed ware and the article is lifted off the bo-ttom
plate for delivery to a take away conveyor system, or the
like.
Turning now to the drawings in greater detail,
Fig. 1 shows in composite plan view the blank and blow stations
of a machine section modified in accordance with the present
invention, Fig. lA illustrating the blank side of the section,
and Fig. lB the blow side thereof. Both views illustrate the
neck ring hub mechanism 10 which mechanism may be identical to
that shown and described in prior art patents such as the Ingle
Patent No. l,911,~19 mentioned previously. In a typical neck
ring mechanism means is provided for axially moving a pair of
neck ring arms, 12 and 14, which arms support the segments or
halves of a conventional neck ring mold and guide rings such
as illusted at the lower portion of Fig. 3. The neck ring mold
segments are illustrated at 16 in Fig. 3 and the guide ring
at 18. The neck ring arms 12 and 14 are also shown in this
view, but not shown is the plunger mechanism for projecting
a plunger (not shown) upwardly through the neck ring opening 20.
Still with reference to Fig. 3 it will be apparent that a yob
of molten glass can be dropped downwardly into the upwardly
open blan~ mold 22 so that the gob is stopped by the upper
end of the plunger (not shown) the gob being ultimately pressed
into parison shape after the upper open end of the blan~ mold
has been closed by the baffle (not shown).
,, , : : '
" 10833SS
Once the parison has been formed at the blank s-t~tion
the split blank mold opens and the neck ring arms swing the
parison from its inverted orientation at the blank station to
an upright position at the blow station, the blow station
. including a split blow mold and bottom plate arrangement as
shown in Fig. 5 which will permit the parison to be blown to
final shape. In accordance with conventional practice the
neck ring arms open at the blow side so that the parison is
upported at the upper corners of the blow mold as indicated
generally at 24 in Fig. 5 with the result that the neck ring
arms can return the neck ring mold to the blank side and
reclose for forming a further parison even as the first parison
is being final formed at the blow station. Finally, the finished
ware is taken out of the blow station by a take-out (not shown)
for removal off the bottom plate of Fig. 5 and for transfer
to a take-away conveyor system (also not shown). The present
invention relates to the means for moving the split molds
at the blank and blow stations, and the means for cooling
these split molds in a unique mold holder arm-structure to
be described.
As mentioned previously a conventional funnel is
mounted on the base or platform provided therefore at the
blank side of the machine and illustrated by reference numeral
26 in Fig. lA. A conventional baffle is also provided, and
the platform or base therefore is also illustrated in Fig. lA
by reference numeral 28. At the blow side or station of the
machine a conventional final blowing head is provided on a
suitable platform structure, indicated generally at 30, in
Fig. lB, and the take out struc-ture is conventionally provided
on its associated platform as indicated generally at reference
numeral 32 in Fig. lB. Still with reference to the conventional
components utilized in a machine section equipped with the
. :. . ... .. . . ~ ,
1083355
present invention, Fig. 10 illustrates in plan view the blow
and blank mold operating air motors 3~ and 36 respectively.
These motors or pneumatic cylinders have movable
portions, 38 and 40 respectively, which are conventionally
; ~ connected through a suitable linkage to oscillate associated
pairs of vertical rock shafts 42, 42 and 4~, 44 located,
respectively, at the blow and the blank sides of the machine
section. These shafts appear in Figs. lB and lA respectively
and will be discussed in greater detail with reference to-
the associated toggle links for achieving the mold opening
and closing movement. Still with reference to Fig. 10 the .
linkage provided between the linearly reciprocal air motor
parts 38 and 40, the reader is referred to the above mentioned
Ingle Patent No. 1,911,119 for a more detailed description -
of this linkage. Basically, such linkage provides for the
opposite but equal angular displacement of each of the rock
shafts associated with each of -the two machine stations
depicted in Figs. lA and lB. It should be noted, however, that
one important feature of the present invention resides in the
fact that this conventional linkage is adapted for use in
~` achieving the in~line motion to be described, and that the
vertically extending rock shafts associated with the conventional
linkage are also adapted for use in achieving this in-line mold
motion for purposes of modifying a conventional Hartford I.S.
type glassware forming machine section with a minimum of
structural changes or modifications.
In accordance with the present invention, and
referring for convenience first to the blow side of the machine
as illustrated in Figs. lB and 2B, a pair of fixed horizontally
extending guide rods or ways 50 and 52 are provided immediately
below the neck ring hub mechanism 10. These guide rods 50
and 52 are oriented normal to the path o movement of the
~g_ .
1083355
! parisons as they are transferred between the blank ~nd the
blow stations by the neck ring arms 12 and 14. More
particularly, the neck ring molds 16, 16 which support the
I parisons during transfer movement in a vertical plane about
the axis of the neck ring hub mechanism 10, and the guide
rods 50 and 52 are horizontally arranged immediately below
the neck ring hub mechanism 10 achieving a saving in space
at the ~low station attributable to the lack of any requirement
for a vertically disposed hinge pin as taught for example in
the above mentioned patent to Ingle No. 1,911,119. Mold
holder structure or means is slidably received on the fixed
guide rods, 50 and 52, and such structure carries the split
blow mold segments thereon so that these mold segments Ml,
M2, M3 and M4 are adapted to move parallel to the fixed ways
toward and away from one another from the open positions
depicted in Fig. lB to closed positions where the mold segments
Ml and M2 mate with one another to define the mold cavity
shown in Fig. 2B.
The mold holder structure more specifically comprises
outer or cantilevered portions 54 and 56, which portions
0 comprise upper and lower mold holder arms, and these arms in
turn support upper and lower mold holder insert plates, 58
and 60, respectively, which plates in turn support the blow
mold halves or segments. Fig. 2B shows the upper and lower
mold holder arms at, 62 and 64, respectively, and also shows
the upper and lower mold holder inser~ plates associated
wi~h the arms at, 58 and 59, respectively. It should perhaps
be noted that the left and right hand mold holder structures
are identical except for the fact that each is a mirror
image of the other, and therefore only the left hand mold
holder structure 54 will be described in detail herein.
--10--
il3355
The left hand mold holder structure no~ only includes
the outer portion S4, but also includes an inner bracket
portion 66 which is slidably received on the parallel horizon-
tally extending guide rails or ways 50 and 52. The inner
portion 66 is rigidly secured to the inner end portion of the
cantilevered outer portion 54 of the left hand mold holder arm
structure by a pin 68, threaded ~asteners 70, 70 and a pivot
pin 72. The pivot pin 72 extends downwardly across a slot 74
defined by a bifurcated portion of the brac~et 66. Thus, the
pivot pin 72 provides a bearing for toggle link 76, which link
76 is pivotally connected by pin 78 to a crank arm 80 provided `
for this purpose at the upper end of the rock shaft 42. It
will be apparent, therefore, that oscillating the rock shaft
42 serves to slide the left hand mold holder arm structure
from the position shown in Fig. lB, to a position for closing
the mold halves Pl and P2 on one another in response to a timed
pneumatic signal simila~ to that utilized in a conventional
Hartford I.S. type machine, with its pivotally mounted mold
holder arms.
In the fixed frame of the machine, and more particularly
in the bed 90, a fixed bracket 92 defines a passageway for
connecting a cooling air source within the machine's fixed
structure to an internal chamber defined in each of the mold
holder means or structures. This cooling air source is depicted
schematically in Fig. 2B, and in this view, an outlet opening
94 for the passageway is defined by the bracket 92. The
opening 94 is arranged in a plane parallel to the direction of
motion of the mold holder structures. Actu~lly, two such
outlet openings are provided as best shown in Fig. 9, one
opening being associated with the left hand mold holder structure
and the other opening being associated witll the rigllt hand
mold holder structure. Fig. 9 also shows the mold holder
.. . . .; ~
` 108335S
structures in their closed position and in this view it wlll
be apparent that cooling air is continuously available to the
internal chamber defined in the mold holder structures, not
only when the molds are closed as shown in Fig. 9, but also
when the molds are opened as depicted in Fig. lB, this as a
result of the relative sizes of the openings associated with
the fixed structure and the inlet openin~ associated with the
mold holder structures. More particularly, in Fig. 9 the
latter opening is considera~ly larger than the former with the
result that cooling air is continuously available to the molds
under substantially the same conditions of the air flow as the
molds are moved from and to their limit positions, with the
result that the temperature of the forming surface of the
mold can be more closely controlled than has been possible
heretofore with cooling wind towers, or the like.
Turning next to a more detailed description of the
mold holder structure itself, and referring more particularly
to the vertical sectional view indicated generally by the line
5-5 of Fig. 2B, the mold holder structures are shown in a
position for forming the article of glassware, that is, with
" the split mold segments Ml and .~2 closed about the bottom
plate B. Each o these mold holder structures includes an
upper and a lower mold holder arm, 62 and 6~ respectively,
which are rigidly secured to one another at the inner ends,
and at the juncture between the bracket 66 and the mold holder
structure itself as best shown in Fig. 2B. In order to adapt
the mold holder arms for supporting molds of various sizes
and shapes, mold holder insert plates 58 and 59 are mounted
thereto and these plates are pivotally mounted to associated
mold holder arms for limited pivo~al movement in a horizontal
plane so as to assure that the molds mate properly with one
another during the forming of the articles of glassware in a
-12-
.- , . . .
., . , ' ': ' . .
` 1~8~55
double gob configuration such as shown in the drawings.
A pivot pin for the upper insert plate is indicated
generally at 100 in Fig. lB and smaller pins 102 and 104 are
snugly received in the insert plates, but loosely received in
the mold holder arms, so as to permit limited pivotal movement
of the insert plates with respect to the arms for this purpose.
Still with reference to the insert plates 58 and 59, the mold
halves or segments can be seen to be hung on these insert
plates in accordance with conventional practice as a result of
the notches provided in such plates and as a result of flanges
provided for this purpose on the molds themselves. The insert
plates on the mold holder arms, and this particular manner of
mounting the molds thereto, is old in the art and need not be
described in detail. Further, in Fig. 5, the pivot pin 100
and associated angular travel limiting pins 102 and 104 have
been omitted from this view for clarity. -~
In accordance with the present invention the left
and right hand mold holder structures define internal chambers
each of which chambers has an inlet opening in continuous
slidable communication with the opening 94 described above.
The internal chamber provided in each of the mold holder
structures is more particularly defined by a middle or a center
chamber defining segment 110 located between the upper and
lower mold holder arms 62 and 64 respectively and illustrated
to best advantage in Fig. 6. This view also shows the lower
mold holder arm in relationship to the middle chamber defining
segment 110. The segment 110 defines a portion of the chamber
in the mold holder structure, and also defines nozzle openings
112 and 114 for delivering cooling air to the various external
areas of the mold segments M2 and M4.
These nozzle openings 112 and 114 are defined by
a thickened inner wall portion 111 of the chamber defining
.; ~
... .. ..
1~8~3S5
segment 110, and these nozzle openings 112 and 114 are prefer-
ably designed to establish a generally horizontal flow pattern
around each of the two generally cylindrical molds Ml, M2 and
M3, M4 respectively. More particularly, the nozzle openings
112, 112 associated with split inner molds Ml, M2 are not
only arranged horizontally, but they are also arranged generally
tangentially with respect to the exterior mold surface in order
to create a circulatory flow pattern such that the cooling air
flows through the nozzle openings 112 and 114 around the molds
M2 and M4 respectively, and vented to atmosphere at vertically
elongated slots, 126 and 124 respectively. The inner slot 126
is defined by the segm~nt 110 and the outer slot 124 by a sheet
metal plate member 122 to be described.
Fig. 6 also shows the pivot pin 100 for pivotally
supporting the mold holder insert plate 59 on the mold holder
arm 64. The angular freedom of these insert plates to move ` !
with respect to their associated arms is facilitated by provid-
ing enlarged openings in the segment 110 not only for the pins
102 and 104 but also ~or the pin 100. Further, the material
presently pre~erred for fabricating the chamber defining segment
110 is aluminum but other readily cast ~aterial might be used
for this chamber defining segment 110. A spacer 111 as shown
in Fig. 5 may be provided at the upper interface of the chamber
defining segment 110 and the upper mold holder arm 62. The
spacer may take the form of a gasket member attached to the
chamber defining segment 110.
I Still with reference to the right hand mold holderstructure and the internal chamber defined therein, Fig. 7 shows
the mold holder arms 54 and 56 and more particularly the lower
cantilevered portions 64 which define an opening, as indicated
generally at 65, to provide communication between the interior
of the above described middle chamber defining segment 110, and
- 14 -
... , :
..
1~83355
the interior of the lower chamber defining segment 116 (see
Fig. 5). As shown in Fig. 7 the mold holder arm 64 preferably
includes nozzle defining passageways 118, 118 for cooling the
adjacent external surfaces of the mold M2, and also nozzle
openings 120, 120 for cooling other adjacent portions of the
mold segment M4, These nozzle openings 118 and 120, like
those described previously with reference to the segment 110
of Fig. 6, are so constructed and arranged that a horizontally
stratified circulatory air flow pattern is created around the
mold segments M2 and M4. m e arrows shown in Fig. 7 illus-
trate tangential direction of the flow lines in this flow
pattern. A bent sheet metal plate member 122 is secured to
the external surfaces of the lower mold holder arm 64 and also
to the external surface of the other mold holder arm 62, and
the outer end portion 124 of said plate member 122 terminates
just short of the parting line for the mold halves M3 and M4
such that the cooling air passing through the nozzles 120 will
be vented to atmosphere at this point. At the inner corners of
the mold holder arms as indicated at 126 in Fig. 7 the air is
vented from nozzles 118, 118. The left hand mold holder struc-
ture is similar, and need not be described in detail.
The lower chamber defining segment 116 is best
shown in the horizontal sectional view of Fig. 8, and this
segment 116 like the segment 110 appearing in Fig. 6, is
pre~erably cast from aluminum, being substantially hollow,
and defining nozzle openings 128, 128 for cooling the adjacent
mold segments M2 and M4. Here again, the desired horizontally
stratified circulatory air flow pattern is achieved as a
result of these generally tangential nozzle openings 128, 128.
Finally, a lower collector portion of the chamber defining
structure within the mold holder means is illustrated to best
advantage in Fig. 9. This lower collector portion actually
-- 15 --
t
': , .. :
1~3355
defines the inlet opening 94 for the chamber as mentioned
previously, and is held to the other chamber defining sections
110 and 116 as a result of the bent sheet metal plate 122.
The collector portion shown in Fig. 9, together with the
lower chamber defining segment 116, comprises a lower chamber
defining structure which is supported from the lower mold holder
arm 64 and insert plate 59. This lower chamber defining structure
defines the inlet opening referred to above for conveying cooling
air under pressure to the interior mold holder structure itself.
The lowermost segment 130 includes a bottom wall 132 and also
defines air passageways or nozzles 134, 134 which nozzles
provide cooling air to the lower portion of the mold halves
Ml and M3, and in addition serve to cool the bottom plate B
as best shown in Fig. 5.
It should perhaps be noted that an upper chamber
defining segment 140 can also be conveniently provided above
the upper mold holder arm in the event that narrow neck
glassware is to be formed, that is in the event that the molds
Ml and M3 extend upwardly a significant distance above the
upper mold holder arm 62. Such a chamber defining segment
( 140 is illustrated in Fig. 5 and includes nozzles 142, 142
but no sectional view is provided for this chamber defining
seqment because of the fact that it would be substantially
similar to those chamber defining segments depicted in Figs.
6 and 8 for example.
Turning next to a description of the improved in-line
mold motion structure associated with the blank side or station
of the machine, and as illustrated in Figs. lA and 2A, a double
gob set of blank or parison molds are depicted in the open
position in Fig. lA at Pl, P2, P3 and P4 such that these mold
segments can be closed upon one another as a result of in-line
motion of the associated mold holder structure to be described,
-16-
" - .
~ 1083355
with the result that these mold se~ments close a~ound the
neck ring mold 16 as shown in Fig. 2A defining upwardly
open cavities ~or receiving gobs of molten glass ~rom the gob
distribution system mentioned previously. As in the blow
side of the machine, left and right hand mold holder struc~ures
are provided in the form of cantilevered means, 200 and 202
respectively, each such mold holder structure including an
upper and a lower mold holder arm, 204 and 206 respectively,
each of which is connected at its inner of right hand end as
viewed in Fig. 2A to the end of a bracket portion of -the mold
holder structure. More particularly the left hand mold holder
structure 200 is attached to a bracket 208 slidably received
on fixed guide rods 210 and 212. These rods or ways are
mounted in the fixed frame of the machine, and more specifically
to a U-shaped bracket indicated generally at 214 in Fig. lA.
The right hand mold holder arm 202 is attached to a
bracket 215, which bracket 215 is slidably supported on the
shaft 212 and on a third shaft 216 located immediately above
the shaft 210 associated with the left hand mold holder
structure. The three guide rods 210, 212 and 216 are arranged
in triangular pattern, as best shown in Fig. 2A, the rod 212
serving to support both brackets 208 and 215. Because this
guide rod 212 is spaced horizontally from the two rods 210 and
216 which also support the brackets, 208 and 215 respectively,
the horizontally cantilevered mold holder structures can react
higher forces than has been possible heretofore with a single
vertical hinge pin. Fig. lA shows both these brackets 208
and 215, each such bracket includes an elongated por-tion such
as that shown at 218 associated with the bracket 215 extending
horizontally between the spaced rods 210 and 212. This
construction and arrangement assures that both mold holder arm
structures will not exhi.bit any tendency to deflect as -the
-17-
1015 33SS
molds close against one another. This construction thus
provides for increased closing forces over ~hose possible
with the prior art vertical hinge pin a~rangement for supporting
the n~old holder arms in a conventional ~lartford I.S. -type
glassware rorming machine.
' Each of the brackets 208 and 215 includes a projecting
portion which defines a suitable land 219 for receiving the
inner end portion of tlle ass,ociated mold holder structures
200 and 202. As on the blow side of the machine section, the
left and right blan~ mold holder structures are attached to
their associated brackets hy means of a dowel pin 220, a pair :-
of threaded fasteners 222, 222 and a pivot pin 224. The
latter pin 224 extends downwardly through an opening defined
by the bifurcated projecting portion of the bracket 208 to
pivotally receive a toggle lin~ 226. The toggle link 226
has a free end portion, best shown in Fig. lA, which is
pivotally mounted to a cran~ arm 228 provided for this purpose
on the upper end of the rock sha~t 44. ~s so constructed and
arranged oscillation of the shafts 44, 44 produces equal but
opposite translational movements of the mold holder arm
structures 200 and 202 toward and away from one another in
response to actuation of the fluid motor 34 described herein-
above with reference to Fig. 10.
As in the blow mold supporting structure described ~'
hereinabove th~ blank mold supporting structure also includes
a generally vertically extending interface between its lower
movable collector portionr indicated generally at 230 in Fig.
2~, which portion 230 cooperates with the outlet defining
fixed structure 232 defining the passageway to provide
communication between the source of cooling air within the
machine section and thc inle~ opening d~fined in the structure
indicated generally at 230. Whilc this interface is depicted
-18-
1~33355
as being ver~ical, it is impor'Lant to note that such interface
need only be parallel to the direction defined by the fixed
ways or guide rods 210, 212 and 216O Still with re~erence
to this interface between the movable mold structure the
fixed machine rame, Fig. lA illustrates the fixed outlet
opening defining structure 232 and also illustrates the inlet
opening associated with the mold holder structure 230. As
in the mold holding structure associated ~Jith the blow mold
side of the machine, the opening defined within the movable
structure is considerably larger than that defined in the
~ixed structure of the machine frame such that air ~or cooling
purposes is continuously available to chambers defined
internally of both blank mold holder structures 200 and 202.
Turning next to a more detailed description of the
left hand blank mold holder structure 200, Fig. 3 shows the
parison mold segments Pl and P2 mounted to the movable mold
holder structure and more particularly to upper and lower insert
plates 234 and 236 carried respectively by the upper and lower
mold holder arms 204 and 206. As in the mold holder structure
associated with the blow side of the machine, these arms and
inserts define openings therethrough, and are vertically spaced
from one another such that an intermediate chamber defining
segment 246 can be inserted between the upper and lower mold
holder arms This chamber defining segment 246 is illustrated
in horizontal section in Fig. 4 in some detail. The openings
in the mold holder arm 206 are indicated generally at 206a and
206b in this view, and the cross sectional configuration of
the chamber defining segment 246 is seen to define a plurality
. of nozzle openings or passageways as indicated generally at
238, 238 such that a flow o~ cooling air is continuously
available to the eY~terior of the mold segments Pl and P3,
not only when the molds are closed, but continuously during
-lg- .
~ ;. . : . .
.. : ~ .,: ... . .. ..
:~833SS
mold holder arm movement.
As in the mold holder structure described above with
reference to the blow side of the machine, a lower chamber
defining structure is provided below the lower mold holder arm,
on the blank side, such structure being indicated generally at
240 in Fig. 3, comprises a chamber defining structure 242
which includes nozzle openings as indicated at 248 for cooling
the lower end of the blank mold and also for cooling the neck
ring molds 16, 16. The lower, or collector portion of the
structure 240, is indicated at 230 and deines the opening
mentioned previously. The said opening has a dimension in
the direction of movement of the mold holder arms such that
a substantial opening is continuously available during mold
holder arm movement for cooling of the molds. Although not
shown in Fig. 2A, a cooling air source is also provided at
the blank side of the machine frame similar to that described
previously with reference to the blow side of the machine
frame, and as depicted in Fig. 2B.
Fig, 3 also shows the means for mounting the inserts
234 and 236 to bheir associated mold holder arms, 204 and 206
respectively, in order to provide for the limited angular
travel of the insert plates, 234 and 236, as necessary to
accommodate slight diferences in the mold ~aces upon closing
of the molds. The pivot pin 243 is received in aligned openings
in the upper and lower mold holder arms 204 and 206, and
! pivotally received in openings provided in the insert plates
themselves so that the plates, and their associated mold
segments, are adapted to pivot at least slightly with respect
to the arms as a result of clearance openings in the inserts
30 for the limiting pin 244. Only one such pin is used in each
mold holder at the blank mold side~ of ~,hQ machine section shown,
and Fig. 4 illustrates the relationship between the pin 244,
-20-
1~8~3S5
the pivot pin 2~2, and -the chamber defining segment 2~6. The
latter is held in place by these pins in the embodiment
shown. Because of the fact that the blank molds do not require
- as e~tensive a flow of cooling air as do the blow molds, a
damper valve is preferably provided in the passageway defined
by the bracket 232. The damper 250 is best shown in Fig. 2A.
As a result of the fact tha~ less cooling air is required to
the blank molds Pl, P3, P2 and P4, Fig. 4 shows that the no
sheet metal outer structure is utili~ed on the blank mold
~holders. So too, somewhat larger openings are provided
between the molds and the segment 246 of Fig. 4 to permit the
lower air flow to be vented to atmosphere. At the blow side,
on the other hand some shrouding is provided for at the inner
and outer ends of the cantilever moun~ed blow mold holder
structures.
Although the drawings show a mold cooling system
which is especially well adapted for cooling a "double gob"
blow mold set-up, it will be apparent that the advantages
attaching to the present invention can also be applied to a
"triple gob" set-up. The space savings at the blow side of
- a "triple gob" I.S. machine section equipped with in-line
mold motion are even more pronounced that with the "double
gob" set-up described hereinabove. Less obvious, but just
as significant are the advantages to applying the above
described mold cooling improvements to a "triple gob" machine
section.
This application is a division of Application Ser. No.
256,358 filed on July 6, 1976.
21-
. . ... , , . , , , , _
- , , : . . .
