CA1328983C - Press for manufacturing stones - Google Patents
Press for manufacturing stonesInfo
- Publication number
- CA1328983C CA1328983C CA000616178A CA616178A CA1328983C CA 1328983 C CA1328983 C CA 1328983C CA 000616178 A CA000616178 A CA 000616178A CA 616178 A CA616178 A CA 616178A CA 1328983 C CA1328983 C CA 1328983C
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- Canada
- Prior art keywords
- mould
- moulding
- stones
- press
- plate
- Prior art date
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Abstract
ABSTRACT
A press for manufacturing stones is 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. At one side of the table at the level of the highest position of the table, means are provided for supplying a moulding plate for supporting products to be shaped during production. The moulding plate has upright ribs which, in use, bear against walls bounding the moulding compartments. The upright ribs have bevelled edges which are sized, shaped, and positioned to form chamfers on corresponding edges of the stones, while at the side opposite the mould a conveyor is arranged for supplying product plates having smooth upper surfaces for supporting products made in the mould.
A press for manufacturing stones is 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. At one side of the table at the level of the highest position of the table, means are provided for supplying a moulding plate for supporting products to be shaped during production. The moulding plate has upright ribs which, in use, bear against walls bounding the moulding compartments. The upright ribs have bevelled edges which are sized, shaped, and positioned to form chamfers on corresponding edges of the stones, while at the side opposite the mould a conveyor is arranged for supplying product plates having smooth upper surfaces for supporting products made in the mould.
Description
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 ~1 .( `~ .' ,, .
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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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 ~' .~ ~
, . -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 . i ..
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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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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 :, , .` ~
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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~''.., . . , 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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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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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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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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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 :' ,A ~
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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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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 li, ' 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 . .
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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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 ~1 .( `~ .' ,, .
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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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 ~' .~ ~
, . -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 . i ..
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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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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 :, , .` ~
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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~''.., . . , 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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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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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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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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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 :' ,A ~
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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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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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:
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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 li, ' 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 . .
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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Claims (23)
1. 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, whereinat 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 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.
2. A press as claimed in claim 1, wherein the conveyor for consecutively supplying product plates supplies the product plates in the same plane as the plane in which the means arranged at theother side of the mould for supplying the moulding plate have been arranged.
3. A press as claimed in claim 1, wherein the conveyor for consecutively supplying product plates has been arranged at the same level as a discharge means for discharging product plates.
4. A press as claimed in claim 3, wherein at the side of the mould opposite from the means for supplying the moulding plate a receiving means for receiving a product plate has been provided said receiving means being removed from under the mold when the moulding plate is moved under the mould.
5. A press as claimed in claim 1, wherein the stamp and the table have been provided with cooperating stops for limiting the movement of the stamp and the table towards each other.
6. A press as claimed in claim 5, wherein means have been provided for adjusting a stop part connected to the table or the stamp along a distance substantially equal to the thickness of the moulding plate supporting the products during production and resting on the product plate supported by the table duringproduction.
7. A press as claimed in claim 5, wherein adjusting means have been provided between the table and the product plate and the product plate can be moved upward relative to the table by means of said adjusting means.
8. A press as claimed in claim 7, wherein the adjusting means comprise inflatable balls.
9. 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 mould, whereby the device has been provided with a conveyor for supplying, under the mould, plates on which stones to be shaped can be 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.
10. 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 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.
11. A mould for manufacturing in a press stones that are substantially rectangular in cross-section, provided with a number of compartments having 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 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.
12. A press for manufacturing stones with bevelled edges, said press comprising:
(a) a fixed mould having a plurality of moulding compartments each of which:
(i) is bounded by upright walls including longitudinal 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 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 (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 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 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 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) a fixed mould having a plurality of moulding compartments each of which:
(i) is bounded by upright walls including longitudinal 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 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 (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 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 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 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.
13. A press as recited in claim 12 wherein:
(a) the moulding compartments are quadrilateral parallelepipeds, each of the plurality of moulding compartments having a length, a width that is less than the length, a thickness, end faces having a width equal to the width of themoulding compartment and a thickness equal to the thickness of the moulding compartment, and longitudinal faces having a length equal to the length of the moulding compartment and a width equal to the width of the moulding compartment;
(b) each of the plurality of moulding compartments is sized and shaped so that, in use, an end face of each stone bears against the moulding plate; and(c) each of the plurality of moulding compartments has surfaces sized, shaped, and positioned for shaping bevelled edges on at least one longitudinal face of the stone.
(a) the moulding compartments are quadrilateral parallelepipeds, each of the plurality of moulding compartments having a length, a width that is less than the length, a thickness, end faces having a width equal to the width of themoulding compartment and a thickness equal to the thickness of the moulding compartment, and longitudinal faces having a length equal to the length of the moulding compartment and a width equal to the width of the moulding compartment;
(b) each of the plurality of moulding compartments is sized and shaped so that, in use, an end face of each stone bears against the moulding plate; and(c) each of the plurality of moulding compartments has surfaces sized, shaped, and positioned for shaping bevelled edges on at least one longitudinal face of the stone.
14. A press as recited in claim 12 wherein the product plates are pushed off the movable table onto the discharge means in an at least substantially horizontal direction.
15. A press as recited in claim 12 wherein:
(a) the moulding plate and one of the product plates are displaced in the same direction during one step by a first pushing means and (b) during another step, the moulding plate is moved in the opposite direction by a second pushing means.
(a) the moulding plate and one of the product plates are displaced in the same direction during one step by a first pushing means and (b) during another step, the moulding plate is moved in the opposite direction by a second pushing means.
16. A press as recited in claim 15 wherein the moulding plate is pushed off the movable table by means of an empty product plate as the empty product plate is delivered into position on the movable table by the conveyor.
17. 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 walls including longitudinal 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 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 (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 35 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 mould mass shaped in the fixed mould;
(f) a moulding plate:
(i) which, during use, can be positioned at the bottom of 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 between its upright ribs, the upright ribs of the moulding 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) a fixed mould having a bottom and having a plurality of moulding compartments each of which:
(i) is bounded by upright walls including longitudinal 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 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 (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 35 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 mould mass shaped in the fixed mould;
(f) a moulding plate:
(i) which, during use, can be positioned at the bottom of 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 between its upright ribs, the upright ribs of the moulding 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.
18. A press as recited in claim 17 wherein:
(a) the moulding compartments are quadrilateral parallelepipeds, each of the plurality of moulding compartments having a length, a width that is less than the length, a thickness, and faces having a width equal to the width of the moulding compartment and a thickness equal to the thickness of the moulding compartment, and longitudinal faces having a length equal to the length of the moulding compartment and a width equal to the width of the moulding compartment;
(b) each of the plurality of moulding compartment is sized and shaped so that, in use, an end face of each stone bears against the moulding plate; and(c) each of the plurality of moulding compartments has surfaces sized, shaped, and positioned for shaping bevelled edges on at least one longitudinal face of the stone.
(a) the moulding compartments are quadrilateral parallelepipeds, each of the plurality of moulding compartments having a length, a width that is less than the length, a thickness, and faces having a width equal to the width of the moulding compartment and a thickness equal to the thickness of the moulding compartment, and longitudinal faces having a length equal to the length of the moulding compartment and a width equal to the width of the moulding compartment;
(b) each of the plurality of moulding compartment is sized and shaped so that, in use, an end face of each stone bears against the moulding plate; and(c) each of the plurality of moulding compartments has surfaces sized, shaped, and positioned for shaping bevelled edges on at least one longitudinal face of the stone.
19. A press as recited in claim 17 and further comprising means for moving one of the stones a distance equal to the thickness of the moulding plate between its upright ribs to thereby permit the movable table to move closer to the movable stamp by that distance.
20. A press as recited in claim 17 and further comprising means for moving a first part of the movable table that supports the product plate upwardly relative to a second part of the movable table that carries the stop provided on the movabletable until the product plate bears against the bottom of the fixed mould.
21. A press as recited in claim 17 wherein the discharge device is vertically movable.
22. A press as recited in claim 17 wherein a product plate bearing shaped moulding mass is pushed off the movable table by means of an empty product plate as the empty product plate is delivered into position on the movable table by the conveyor.
23. 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 having substantially a rectangular cross-section and bevelled joining edges between upright walls of the 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 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 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.
a frame;
a mould mounted on said frame and having boundary walls that define moulding compartments inside said mould, said moulding compartments having substantially a rectangular cross-section and bevelled joining edges between upright walls of the 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 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 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000616178A CA1328983C (en) | 1985-08-23 | 1991-10-21 | Press for manufacturing stones |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8502316 | 1985-08-23 | ||
| NL8502316 | 1985-08-23 | ||
| NL8502484 | 1985-09-11 | ||
| NL8502484A NL8502484A (en) | 1985-08-23 | 1985-09-11 | METHOD AND APPARATUS FOR MANUFACTURING STONES IN A MOLD |
| CA000516615A CA1294763C (en) | 1985-08-23 | 1986-08-22 | Method for manufacturing stones in a press, and press for manufacturing said stones |
| CA000616178A CA1328983C (en) | 1985-08-23 | 1991-10-21 | Press for manufacturing stones |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000516615A Division CA1294763C (en) | 1985-08-23 | 1986-08-22 | Method for manufacturing stones in a press, and press for manufacturing said stones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1328983C true CA1328983C (en) | 1994-05-03 |
Family
ID=27167627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000616178A Expired - Fee Related CA1328983C (en) | 1985-08-23 | 1991-10-21 | Press for manufacturing stones |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1328983C (en) |
-
1991
- 1991-10-21 CA CA000616178A patent/CA1328983C/en not_active Expired - Fee Related
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| MKLA | Lapsed |