Note: Descriptions are shown in the official language in which they were submitted.
1328983
PRESS FOR MANUFACT~JRING STQNES
This is a divisiona1 of Canadian patent application Serial Number 516,615,
filed August 22, 1986.
The invention relates to a method for manufacturing stones in a press
S provided with a mould comprising several moulding compartments and taking a
fixed position, a stamp arranged above the mould and being movable up-and-
down, a table arranged under the mould and being movable up-and-down, a supply
conveyor for supplying empty product plates and with a discharge conveyor for
discharging the product plates carrying stones shaped in the mould.
From the U.S. patent specification 1,921,003 there is known a press
whereby for shaping the stones in the mould a moulding plate having a smooth
upper surface is moved under the mould and which is pressed against the bottom
of the mould by means of an eccentric mechanism before the mould set into
vibration.
After the mass put into the mould has been compressed sufficiently the
moulding plate is moved from under the mould and a product plate, i.e. a plate on
which the shaped products are discharged from the press and are e.g. conveyed toa drying or storage room, is moved under the mould. At the same time a spring-
suspended table is moved upward for supporting the product plate moved under
20 the mould. Following that the products shaped in the mould are pressed
downward out of the mould by means of the stamp whilst at the same time the
spring-suspended table is also moved downward.
When applying such a method of manufacturing products it is not possible
to ensure a constant height of the products shaped in the mould, as in particular on
25 removing the products from the mould there is a danger that the products havebeen deformed in an undesirable manner between the stamp and the spring-
suspended table.
, From the U.S. patent specification 3,679,340 there is furthermore known a
press provided with a vertically adjustable table by means of which a product plate
30 is pressed against the bottom of the mould for shaping products in the mould
1, arranged in a fLlced position. Moulding bars may thereby be moved above the
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1328983
product plate into openings provided in the mould for the purpose for forming
holes in the products to be shaped.
Also in this case the products are pressed out of the mould by means of
stamps after moulding, whilst the table with the moulding plate is thereby movedS downward, but also in this case no means have been provided to ensure that the
products shaped in the mould keep a constant height.
Paving stones and the like, however, need to have a constant length and
width to make possible the pavement of a road surface or the like in a regular
pattern, whilst such paving stones usually must be provided with bevelled edges or
so called chamfers. For the thickness dimension the requirements are less strict,
as differences in thickness of the paving stones can be absorbed by the sand bed or
the like in which the stones are placed. Therefore it has been quite common so
far to manufacture such stones Iying in a mould, so that the measures of length
and width of the stones are determined by the vertical walls bounding the
moulding compartments in the mould, so that a constant measure of length and
width can be ensured. In particular with stones having chamfers the stones are
thereby shaped in the mould in such a manner that the eventual upper surface of a
stone is shaped in the bottom of the mould Iying on the moulding plate. In
practice the upper surface of the stones shaped in such a manner appears to be the
least wear-resistant surface of the brick.
The purpose of the invention now is to obtain a method whereby such
~! stones provided with chamfers can be produced vertically standing, as a greater
production capacity can be achieved herewith as well as a better compression of
the material of which the stone is made. In particular the upper surfaces of thestones, which are shaped in the mould against the upright side walls of the
moulding compartments in the mould obtain a dense surface thereby, which is
more wear-resistant than the upper surfaces of the stones produced in the usual
manner.
According to a first aspect of the invention this can be achieved because the
i 30 moulding mass is compressed in the mould whilst under the mould a moulding
plate supported by the table is located, which is provided with upright ribs for, shaping bevelled edges on the stones, whereby during compression the stamp is
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3 13289g3
moved downward until the stamp is located at a certain distance from the table,
determined by cooperating stops provided on the table and on the stamp, after
which the moulding plate is removed from between the table and the mould, whilstsimultaneous1y a product plate is moved between the table and the mould and nextS the stones shaped in the mould are pressed out of the mould by moving the stamp
and the table simultaneously downward while maintaining the desired distance
between the table and the stamp by means of the stops.
According to a second aspect of the invention the purpose aimed at can be
achieved because the moulding mass is compressed, whilst under the mould there
is located a moulding plate supported by the table and Iying on the product plate
and being provided with upright ribs for shaping bevelled edges on the stones,
whereby during compression the stamp is moved downward until the stamp is
located at a certain distance from the table, determined by cooperating stops
provided on the table and on the stamp, after which the moulding plate is pulledfrom between the mould and the product plate Iying on the table and then the
product plate Iying on the table is moved upward over a distance equal to the
thickness of the moulding plate between the ribs and after that the stones shaped in
the mould are pressed out of the mould by moving the stamp and the table
simultaneously downward while maintaining the desired distance between the tableand the stamp by means of the stops.
The table with the product plate can hereby be moved upward entirely after
removal of the moulding plate, whilst end surfaces of the stops provided on the
table or the stamp are likewise displaced along a distance equal to the thickness of
the moulding plate between the ribs.
Another possibility is to press, after removal of the moulding plate, a part
of the table supporting the product plate upward relative to the part of the table
carrying the remaining part of the stops until the product plate bears against the
bottom of the mould.
When applying the above methods it is always ensured, therefore, that the
stones are given a certain length during shaping in the mould determined by the
distance at which the stamp and the table are kept from each other by means of the
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4 1328983
stops, whilst said distance between table and stamp is also maintained during the
removal of the stones from the mould.
With the method according to the invention care is always taken namely
that the product plate bears against the bottoms of the stones shaped in the mould
S before the stones, retained between the product plate and the stamp held at a fixed
distance from said product plate, are pressed out of the mould by means of the
stamp.
Thus it is not only prevented that the stones undergo undesired
deformations as a result of uncontrolled movements of the product plate and the
mould relatively to each other, but also that the stones fall out of the mould onto a
product plate located at some distance under the mould, which might also lead toundesired deformations.
It is noted that, although hereinabove a mould with a fixed arrangement has
been discussed it is of course possible to set the mould vibrating, as is e.g.
described for the mould with fixed arrangement in the U.S. patent specification
1,921,003.
It is noted that from the German Offenlegungsschrift 1.584.467 there is
known a method for manufacturing stones whereby the stones are shaped on a
moulding plate Iying between a mould and a product plate on a table during the
manufacture of the stones. After compression of the moulding mass in the mould
the moulding plate is removed and the mould is moved upward relative to the
stamp for pressing the shaped products out of the mould. Also when using such a
method it is not possible to ensure constant height of the product.
Various aspects of this invention are as follows:
A press for manufacturing stones provided with a fixed mould containing a
plurality of moulding compartments, and a vertically movable stamp arranged
above the mould and a vertically movable table arranged under the mould, wherein, at one side of the table at the level of the highest position of the table means have
been provided for supplying a moulding plate for supporting products to be shaped
during production, said moulding plate having upright ribs that, in use, bear
against walls bounding the moulding compartments, said upright ribs having
bevelled edges sized, shaped, and positioned to form chamfers on corresponding
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5 1328983
edges of the stones, while at the side opposite the mould a conveyor has been
arranged for supplying product plates having smooth upper surfaces for supporting
products made in the mould.
A device for manufacturing stones provided with a mould arranged in a
fixed position, and a vertically movable stamp provided above the mould and a
vertically movable table under the mou1d, wherein the device is provided with a
conveyor for supplying, under the mould, plates on which stones to be shaped canbe put and a discharge conveyor for discharging plates supporting shaped stones,wherein joining the supply conveyor are a first conveyor for supplying smooth
plates and a second conveyor for supplying plates provided with upright ribs, said
upright ribs having bevelled edges sized, shaped, and positioned to form chamfers
on corresponding edges of the stones, while means have been provided for
alternatingly placing smooth plates and plates provided with ribs on the supply
conveyor, while upstream of the mould means have been arranged for supplying
the plates provided with ribs to the second conveyor for plates provided with ribs.
A device for manufacturing stones provided with a mould arranged in a
fixed position, and a vertically movable stamp provided above the mould, whereinthe device is provided with a conveyor for supplying, under the mould, plates onwhich stones to be shaped can be put and a discharge conveyor for discharging
`~ 20 plates supporting shaped stones, said mould containing a plurality of moulding
compartments, along with filling pieces which, during moulding, are put in a first
, position under walls bounding the moulding compartments of the mould, said
filling pieces having been provided with upright ribs which fit in grooves provided
in the walls bounding the moulding compartments and with bevelled edges
protruding beyond said walls to form chamfers on said stones, and means for
moving said filling pieces from said first position to a second position wherein said
bevelled edges are removed from below said moulding compartments.
A mould for manufacturing in a press stones that are substantially
rectangular in cross-section, provided with a number of compartments having
i 30 upper and bottom sides and being open at their upper and bottom sides and
bounded by upright walls, each corresponding in cross-section with the
`! substantially rectangular cross-section of the stone, wherein the upright walls of
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1328983
the compartments join each other at joining edges and the joining edges between
the upright walls of the compartments are bevelled for forming chamfers on the
stones.
A press for manufacturing stones with bevelled edges, said press
S comprising:
(a) a fixed mould having a plurality of moulding compartments each of
which:
(i) is bounded by upright wa11s including longitudinal
walls and transverse walls;
10 (ii) has a top and a bottom;
(iii) is open at the top and at the bottom;
and
(iv) has two adjacent upright corners formed between the
longitudinal walls and the transverse walls that are bevelled to form chamfers on
15 longitudinal faces of the stones:
(b) a movable stamp:
(i) arranged above the fixed mould for movement up-
and-down relative to the fixed mould; and
(ii) having bevelled edges for forming chamfers on end
20 faces of the stones;
(c) a movable table arranged beneath the fixed mould for movement up-
and-down relative to the fixed mould;
(d) a conveyor for supplying empty product plates each of which has a
flat upper surface to a position beneath the fixed mould;
(e) a discharge means for conveying away product plates carrying
moulding mass shaped in the fixed mould;
(f) a moulding plate:
(i) which, in use, is supported by the movable table and
(ii) which has an upper surface which is provided with
30 upright ribs for shaping bevelled edges on end faces of the stones, the upright ribs
of the moulding plate being positioned to extend at least substantially under the
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1328983
upright longitudinal walls of the moulding compartments when the moulding plate
is positioned at the bottoms of the moulding compartments; and
(g) stop means provided on the movable table and on the movable
stamp for forming stones of constant height within the press.
A press for manufacturing stones with bevelled edges, said press
comprising:
(a) a fixed mould having a bottom and having a plurality of moulding
compartments each of which:
(i) is bounded by upright wa11s including longitudinal
10 walls and transverse walls;
(ii) has a top and a bottom;
(iii) is open at the top and at the bottom;
and
(iv) has two adjacent upright corners formed between the
15 longitudinal walls and the transverse walls that are bevelled to form chamfers on
longitudinal faces of the stones;
(b) a movable stamp:
(i) arranged above the fixed mould for movement up-
~! and-down relative to the fixed mould and
f 20 (ii) having bevelled edges for forming chamfers on end
faces of the stones;
(c) a movable table arranged beneath the fixed mould for movement up-
and-down relative to the fixed mould;
. (d) a conveyor for supplying empty product plates each of which has a
25 flat upper surface to a position beneath the fixed mould;
(e) a discharge means for conveying away product plates carrying
mould mass shaped in the fixed mould;
(f) a moulding plate:
. (i) which, during use, can be positioned at the bottom of
30 the fixed mould; and
(ii) having an upper surface which is provided with
~, upright ribs for shaping bevelled edges on the stones and having a thickness
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1328983
between its upright ribs, the upright ribs of the mou1ding plate being positioned to
extend at least substantially under the walls of the moulding compartments when
the moulding plate is positioned at the bottom of the fixed mould; and
(g) stop means provided on the movable table and on the movable
stamp for forming stones of constant height within the press.
A press for manufacturing stones comprising:
a frame;
a mould mounted on said frame and having boundary walls that
define moulding compartments inside said mould, said moulding compartments
lû having a substantially rectangular cross-section and bevelled joining edges between
upright walls of each moulding compartment;
a stamp mounted on said frame and movable up-and-down arranged
above said mould;
a table arranged under said mould in position to receive stones
ejected from said mould by said stamps; and
a plurality of filling pieces which are movable between a first
i, position in which said plurality of filling pieces are located under said mould and
wherein seen in top view at least part of said plurality of filling pieces project
from said boundary walls for forming recesses and a second position in which
, 20 plurality of filling pieces are located beside said mould, seen in top view and
wherein said filling pieces have been provided with upright ribs which fit in
grooves provided in the walls bounding the moulding compartments.
- The invention will be more fully explained hereinafter with reference to
some embodiments of the method and a device according to the invention
, 25 illustrated in theaccompanying figures.
3 Figure 1 is a view of a stone to be manufactured while applying the method
and/or device according to the invention;
Figure 2 is a diagrammatic section of a mould with a plate provided with
ribs located thereunder;
Figure 3 is a top view of a part of the mould illustrated in Figure 2;
Figure 4 is a larger-scale illustration of a part of Figure ~;
-. Figure 5 illustrates a part of a stamp;
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1328983
Figures 6-11 diagrammatically illustrate an embodiment of a press
according to the invention, whereby the various parts of the press are illustrated in
positions which they take during consecutive stages of the method according to the
inventlon.
Figures 12-14 illustrate a second embodiment of a press according to the
invention, whereby the parts of the press are illustrated in consecutive stages of a
method for manufacturing stones, whilst Figures 13A and 14A illustrate on a
larger scale the parts XIII-XIV encircled in Figures 13 and 14.
Figure 15 is a section of a part of a mould, a part of a flat plate placed
under the mould and filling pieces moved between said flat plate and the mould.
Figures 16-20 diagrammatical1y illustrate a press according to the
invention, whereby use is made of the parts illustrated in Figure 15, whilst in
Figures 16-20 the various parts of the press are illustrated in positions duringconsecutive stages of the method according to the invention.
Figure 21 diagrammatically illustrates a top view of a further embodiment
of a press according to the invention.
Figure 22 diagrammatically illustrates a further possible embodiment.
Figure 23 diagrammatically illustrates a further possible embodiment.
The purpose of the device and method according to the invention is to
produce a stone or clinker of the type such as illustrated~ in Figure 1, i.e.
preferably an elongate stone 1, rectangular in cross-section, which at least at one
of its bounding plates is provided with bevelled edges 2.
Por shaping such a stone use is made of a mould 3, which is subd*ided
into moulding compartments 4 by means of longitudinal walls 5 and transverse
walls 6.
As illustrated in Figure 3 the moulding compartments 4 are bevelled near
the joining points between the longitudinal walls 5 and the transverse walls 6. In
, the illustrated embodiment all angles are bevelled so that a stone shaped in such a
moulding compartment 4 will be provided with bevelled edges in two planes Iying
opposite each other. It will be apparent that it will also be possible, however, to
let the walls 5 and 6 join each other rectangularly at one side of the moulding
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1328983
compartment 4, so that the stone will be provided with bevelled edges at only one
side.
The moulding mass to be provided in the moulding compartments 4 can be
compressed by means of a stamp 7 illustrated in Figure 5, which stamp is
provided with a number of stamp heads 8. In the il1ustrated embodiment each
stamp head 8 is provided with a pair of protruding noses 9 for forming beve11ed
edges at two facing sides of the stone to be formed. It will be apparent, however,
that if desired also one of the noses can be left out, so that only at one side of the
stone will a bevelled edge be formed by means of a nose 9.
As further appears from Figures 2 and 4 the mould 3 may be closed at the
bottom during shaping of the stones by means of a so-called moulding plate 10,
which is provided with upright ribs 11, which have been provided in such a
manner that said ribs extend at least substantially under the longitudinal walls 5.
As will be particularly apparent from Figure 4 the ribs protruding outside the
longitudinal walls 5 are bounded by sloping boundary planes, so that said parts of
the ribs 11 protruding outside the longitudinal walls 5 will form bevelled edges in
~! the stones shaped in the moulding compartments 4.
In the illustrated embodiment, bevelled edges will be formed at facing sides
of a stone shaped in the moulding compartment by the ribs 11. It will be possible,
y 20 however, to bound a rib 11 at one side by means of a vertical plane located in the
extension of one side of the relevant longitudinal wall 5, so that the stones 1
shaped in the moulding compartments 4 of the mould will each be provided at only! one side with a bevelled edge by the ribs 11.
~ummanzing, it will be apparent, however, that by means of the above
'~ 25 mould in co-operation with the stamp 7 and the moulding plate 10, depending on
the chosen shape, stones can be shaped which may be provided, either at one sideor at two facing sides, with bevelled edges or so-called chamfers. The stones can
thereby be produced in the mould with their longitudinal axis arranged vertically
on the moulding plate 10, so that with a surface of the mould remaining equal a
considerably larger amount of stones can be produced than in the case when the
stones are produced in the mould with their longitudinal axis parallel to the
moulding plate 10.
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1328983
11
A possible method for manufacturing stones while using parts described
hereinabove in a press for manufacturing stones will be more fully described
hereinafter with reference to Figures 6-11.
Said press comprises a frame, not further i11ustrated, in which the stamp 7
is such as to be movable in the vertical direction above the mould 3 mounted in
the frame. Furthermore the press is provided with a filling wagon 12, being
movable to and fro a1Ong rails or the like not further illustrated. Under the mould
3, a table 14, movable up-and-down by means of adjusting cylinders 13, is
arranged. When the table 14 takes its lowest position, i11ustrated in Figure 6, the
upper surface of the tab1e 14 is located at the ~ame level as the upper surface of a
discharge device 15. Arranged at the side of the table 14 turned away from the
discharge device is an adjusting cylinder 16 by means of which a pushing means
17 is movable to and fro in the horizontal direction across the table 14 when the
table takes the lowest position illustrated in Figure 6.
The device is provided with a conveyor 18, diagrammatically illustrated on
the right of the mould in Figure 6, which conveyor is not illustrated in the other
Figures 7-11. By means of said conveyor, so-called product plates, preferably
being entirely flat at least at their upper side, are supplied in the direction
according to arrow A.
, 20 At the side of the mould 3 turned away from the conveyor 18, supporting
means, not further illustrated, have been provided across which a moulding plate3 10 iS displaceable by means of a pushing means 20 displaceable to and fro in the
, horizontal direction and being adjustable by an adjusting cylinder 21 only partly
illustrated.
As will further be apparent from Figure 6 both the product plates 19 and
~ the moulding plate 10 lie in one plane thereby, in which they are displaceable just
- under the bottom of the mould 3.
For filling the moulding compartments 4 of the mould 3 the table 14 is
pressed upward from the position illustrated in Figure 6 to the position illustrated
' 30 in Figure 7, whilst the moulding plate 10 is moved on the table by the pushing
means 20. Simultaneously or afterwards the stamp 7 is moved upward and the
filling wagon is brought above the mould 3, so that the moulding mass in the
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1328983
12
filling wagon can be deposited from the filling wagon into the moulding
compartments 4 of the mould 3.
Then the fil1ing wagon is moved back and the stamp 7 is moved downward,
as i11ustrated in Figure 8. By means of suitab1e vibrating means the stamp 7
S and/or the mou1d and/or the tab1e 14 can then be set into vibration forcompressing the mou1ding mass in the mou1ding compartments 4. After the
moulding mass in moulding rooms has been sufficiently compressed the conveyor
18 is put into operation for displacing the product plates in the direction according
to arrow A. As is i11ustrated in Figure 9 one of the product p1ates 19 is moved
under mou1d 3 as a resu1t of that, whi1st simu1taneous1y the mou1ding p1ate 10 is
pushed back to the origina1 retracted position i11ustrated in Figure 6.
Next the tab1e 14 with the re1evant product p1ate 19 resting on the tab1e 14 -
is moved downward, whi1st simu1taneous1y the stones shaped in the mou1d are
pressed downward by means of the stamp heads. It is noted that the construction
is such that after compression of the moulding mass in the moulding compartmentsthe stamp heads can still be moved downward through the moulding compartments
to near the bottom of the mould for effecting an even remova1 of the shaped stones
from the mou1ding compartments whi1e moving downward the product p1ate 19
supported by the table 14.
The stones pushed out of the mould, standing on the product plate 19, are
~j,J' further moved downward until the table 14 has again arrived at the discharge
device lS. Then the product plate can be pushed on the discharge device by
means of the pushing means 17, as illustrated in Figure 11. Then the table 14 can
.1l be moved upward again and the production cycle described hereinabove can be
i 25 repeated again.
It will be apparent that in this way stones, vertically standing with their
longitudinal axes upright if desired, can be produced, whilst the stones are
provided with bevelled edges or charnfers at one or two facing sides, whereby the
actual production of the stones takes place on a specia11y for ned moulding plate
provided with upright ribs, whilst the discharge of the stones takes p1ace on
, considerably cheaper, smooth, so-called product plates.
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1328983
13
A second possibility for producing the stones by means of the parts
illustrated in Figures 1-5 is illustrated in Figures 12-14. Said parts, which
correspond with the parts described hereinabove are provided with the same
reference numbers of these figures as used hereinabove.
S In this embodiment the conveyor 18, only illustrated in Figure 12, for
supplying the product plates 19 lies on the same level as the discharge means 15.
- With the device illustrated in the Figures 12-14 the stamp 7 is furthermore
provided with spacing means 22 provided at the sides of the stamp and extending
downward, which are intended to cooperate with spacing means 23 fixed to the
table 14. As is diagrammatically illustrated in Figures 13A and 14A an adjusting- cylinder 24 is incorporated in the spacing means at the upper end of each spacing
'! means 23 by means of which a pin 25 is movable up-and-down between the
position illustrated in Pigure 13A, in which the pin protrudes a little from the`` upper end of the spacing means 23, and the position illustrated in Figure 14A, in
j.'3j 15 which the upper end of the pin 25 is located in the same plane or lower than the
upper end of the spacing means 23.
As illustrated in Figure 12 one product plate 19 rests on the upper surface
of table 14 during filling of the mould by means of the filling wagon 12, whilstthe moulding plate 10 rests on said product plate.
1 20 After the fi11ing wagon 12 has moved away the stamp 7 is moved
q downward and the moulding mass is vibrated as described hereinabove. During
, said vibration the pins 25 assume their extended position illustrated in Figure 13A,
I and at the moment when the spacing means 22, during the downward movement of
the stamp during vibration of the moulding mass, gets into touch with the ends of
the pins 25, a signal is given as a result of which vibrating is stopped. The stones
shaped in the mould then have exactly the desired height. After this the moulding
` plate 10 is removed from under the mould by means of the pushing means 20,
which for this purpose may be provided with a suitable gripping means for
gripping the moulding plate. Furthermore the protruding pins 25 are retracted and
the product plate 19 Iying on the table is moved upward by means of the table
i against the bottom of the m~uld, whereby the ends of the spacing means 22 and 23
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will again bear against each other, as the stroke along which the pins 25 are
retracted is equal to the thickness of the moulding plate 10.
Next the stamp 7 and the table 14 are moved downward simultaneously for
pressing the products shaped in the mould out of the mould. The spacing means
22 and 23 make sure thereby that the distance between the bottoms of the stamp
heads of the stamp and the upper surface of the product plate 19 remains
constantly equal during said pressing of the stones out of the mould, so that the
adjusted length of the stones is maintained and the stones are not deformed in an
: undesirable manner. After the stones have been pressed out of the mould the table
14 can be moved further downward to the level of the discharge means. When the
table has arrived at said level an empty product plate 19 can be moved on the table
- by putting the conveyor 18 into operation while simu1taneously moving the product-
plate supporting the shape stones off the table, which latter product plate is moved
on the discharge means 15. Meanwhile the stamp 7 may have been moved upward
,1
i 15 to enable the filling wagon 12 to move above the mould again.
After removal of the product plate supporting the shaped stones the table
then supporting an empty product plate can be moved upward again to the position.',1
illustrated in Figure 12, in which position the moulding plate can again be moved
on the product plate 19 and the cycle described above can repeat itself again.
It will be apparent that with the press described with reference to the
i Figures 6-11 also spacing means 22 and 23 may be provided with a view to
obtaining and maintaining an exact length of the shaped stones. Thereby it will
not be necessary in this first embodiment to provide the adjusting cylinders 24
with the pins 25 adjustable by means of said adjusting cylindas.
Figure 15 illustrates a section of a mould 3, whereby the bottom ends of
the longitudinal walls 5 are located a little higha than the bottom edges of thetransverse walls 6, whilst grooves have been provided in the bottom ends of the
longitudinal walls 5. Said grooves serve to accommodate ribs 27, which are fixed, to filling pieces 28, which correspond in section with the ribs 11 of a moulding
plate 10 described hereinabove. On application of said ribs 28 extending parallel
to each other it will not be necessary to use a moulding plate 10 and the stones can
:~ be shaped direct on a product plate 19. The use of said filling pieces in a press
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1328983
according to the invention will be more fully explained hereinafter with reference
to the Figures 16-20. As appears from Figure 16 the conveyor 18, only illustrated
in Figure 16, again lies on the same level as the discharge means 15.
Furthermore the filiing pieces 28 extending parallel to each other at the level of
S the longitudinal walls S can here be displaced again by means of the pushing
means 20 movable to and fro by means of the adjusting cylinder 21.
When the table 14, as illustrated in Figure 16, talces its lowest position a
` product plate 19 can be moved on the table by means of the conveyor 18. Next
both the table 14 and the stamp 7 can be moved upward to the position illustrated
i 10 in Figure 17 in which then, as indicated in Figure 17, the filling pieces can be
moved between the product plate 19 and the mould 3 by means of the pushing
means 20, whilst the filling wagon 12 can be moved above the mould for filling
the mould.
While the filling pieces 28 are moved under the mould the protruding ribs
'~ 15 provide a good guide for the filling pieces, so that said filling pieces are put in the
j correct position relative to the mould, whilst the ribs also make sure that the filling
pieces do not make undesired movements when the filling mass is being
compressed in the mould 3.
After filling the mould 3 the filling wagon can be moved away and the
20 stamp moved downward for compressing the mass put into the mould. The stamp
and the table may thereby again be provided with the spacing means described
~f hereinabove, whereby the adjusting cylinders with adjustable pins applied
according to Figures 12-14 can be left out.
After the moulding mass has been compressed in the desired manner the
25 filling pieces can be retracted by means of the pushing means 20 again, as
illustrated in Figure 18, fof which purpose the pushing means has been provided
with suitable means for talcing along the filling pieces. After removal of the filling
pieces the shaped stones can be pressed out of the mould by the simultaneous
downward movement of the table 14 and the stamp 7 (Figure 19), after which the
30 table can be moved further downward to the level of the conveyor 18 and the
discharge means 15 (Figure 20). By putting the conveyor 18 into operation again
the product plate filled with stones will be moved from the table 14 on the
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discharge means 15 by an empty product plate. Then the table 14, now supporting
an empty product plate again, can be moved upward again, after which the
production cycle described above can be repeated again.
Figure 21 diagrammatical1y illustrates a press 29 which is provided with a
S stamp, a mould, a fil1ing wagon, a bridge and a discharge means as described
hereinabove. Furthermore a supply conveyor 30 has been provided for supplying
empty product plates 19, a discharge conveyor 31 for discharging product plates
`l supporting shaped stones and a conveyor 32 by means of which moulding plates
10 leaving the press at the top side seen in Figure 21 are discharged into the
10 direction of the conveyor 30.
The conveyor 30 and 32 join each other near a supply conveyor 33 by
means of which a product plate 19 received from the conveyor 30 and a moulding -plate 10 received from the conveyor 32 are alternatingly supplied to the press 29.
The use of this device is such that a moulding plate is placed under the
15 mould incorporated in the press 29 and then the products are manufactured in the
` mould in the manner described with reference to the Figures 6 and 7 and direct on
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' the mou1ding plate.
After the products have been compressed the moulding plate is further
displaced by means of the conveyor 33 and the product plate, located behind the
20 moulding plate seen in the direction of displacement, is moved under the mould.
The table 14 is then moved downward, whilst initially the stamp 7 moves along
; downward too for pressing the shaped products out of the mould. The table 14
, with the product plate is moved further downward until the product plate has
.~ arrived at the level of the discharge conveyor 31, which is located lower than the
25 conveyor 30, 32 and 33.
Meanwhile the moulding plate 10 has been brought to the beginning of the
conveyor 32 and is delivered to said conveyor to be taken to the beginning of the
conveyor 33 again by means of the conveyor 32.
;' It will be apparent that the manner in which the stones are manufactured by
30 means of this device corresponds in principle with the manner of production as
described with reference to the first embodiment whereby, however, use is made
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of a number of moulding plates moving along a closed path through the device
instead of a moulding plate movable to and fro by means of a pushing means.
Of course vanations and/or additions to the embodiments described
hereinabove and illustrated in the figures will be possible within the spirit and
S scope of the invention. Thus it will be possible e.g. to use mechanical means
instead of the adjusting cylinders for displacing the various parts. Furthermore it
is possible for the various plates to be displaced by pulling means instead of
pushing means. The mou1ding plate 10 may also be mechanica11y coupled thereby
with the relevant pushing or pulling means, e.g. with resilient means such as leaf
10 springs or the like, such that the means effecting the connection between thepushing or pu11ing means and the moulding plate 10 do not influence the vibrating
movement in a disadvantageous manner during vibration of the moulding mass in
the mould 3. It is also conceivable to provide the stamp heads 8, besides the two
noses illustrated in Figure 5, with a pair of further noses extending between the
15 ends of the noses 9. Between the ribs 11 corresponding ribs, extending
transversely between the ribs 11 near the transverse wa11s 6 may be provided.
With such a construction two facing surfaces of the stone will be provided with
circumferential chamfers.
With the press illustrated in Figure 6 it is also possible to arrange the
20 conveyor 18 at the same level as the discharge means 15. With such a
construction, the table 14 will be moved downward after vibration of the moulding
mass, for bringing a product plate 19 onto the table 14 by means of the conveyor18. Then this product plate is moved upward with the table 14 and, after pullingor pushing of the moulding plate 10, is pushed against the bottom of the mould 3.
25 Following that the shaped stones can be pressed out of the mould 3 and moved
downward as described hereinabove. At the level of the discharge means the
product plate carrying the stones can then be moved on the discharge means againin the manner described above after which the table can be moved upward again
against the moulding plate 10 placed under the mould in the meantime.
Figure æ furthermore illustrates a possible embodiment whereby the
conveyor 18 is located at the same level as the discharge conveyor 15. Here,
howeva, a table 34 and a pushing means 35 have been arranged near the pushing
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means 20, at the side of the mould 3 opposite from the pushing means 20. With
this arrangement a product plate 19, supplied by the conveyor 18, can be moved
upward by the table 14 to the position illustrated in Figure 22. In this position the
product plate 19 can be moved on the table 34 whilst simultaneously the mouldingS plate 10 is moved under the mould 3. After the stones have been shaped the
moulding plate 10 may be pulled or pushed from under the mould 10 whilst the
product plate 19 is again pushed or pulled under the mould 3 from the table 34.
After that the stones may be pressed out of the mould in the manner described
`~ above and moved downward together with the product plate by means of the table
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10 14 for discharge.
As an alternative to the construction illustrated with reference to Figures
` 12-14, the construction illustrated in Figure 23 may be used. With this
~-, construction means have been provided by which the product plate 19 can be
moved upward over a small distance relative to the table 14.
In the illustrated embodiment said means are formed by inflatable balls 14',
which have been provided in openings provided in the table 14 and by means of
which the product plate can be moved upward over a small distance from a
position in which it lies on the table 14 to the position illustrated in Figure 23.
When using this construction the product plate 19 supporting the moulding
. 20 plate located thereabove lies flat on the table 14 when the stones are being shaped.
After that the moulding plate is removed as described with reference to Figures
`~ 12-14. Then the product plate 19 is pressed firmly against the bottom of the
mould by inflating the balls 14', after which the stones, while maintaining the
fixed distance between the table with product plate and stamp, are removed from
25 the mould with the stamp. Then the balls 14' are deflated again and the product
' r,'.~ plate carrying stones is removed, after which a new working cycle can start, all
this in a manner similar to the one described with reference to Figures 12-14.
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