EP2425949B1 - Haltevorrichtung einer Steinformling-Presse, und Herstellungsverfahren dafür - Google Patents

Haltevorrichtung einer Steinformling-Presse, und Herstellungsverfahren dafür Download PDF

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Publication number
EP2425949B1
EP2425949B1 EP11176822.2A EP11176822A EP2425949B1 EP 2425949 B1 EP2425949 B1 EP 2425949B1 EP 11176822 A EP11176822 A EP 11176822A EP 2425949 B1 EP2425949 B1 EP 2425949B1
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EP
European Patent Office
Prior art keywords
plate part
step plate
parts
mould
height
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP11176822.2A
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English (en)
French (fr)
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EP2425949A1 (de
Inventor
Wilhelmus Jacobus Maria Kosman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beheermaatschappij De Boer Nijmegen BV
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Beheermaatschappij De Boer Nijmegen BV
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Application filed by Beheermaatschappij De Boer Nijmegen BV filed Critical Beheermaatschappij De Boer Nijmegen BV
Publication of EP2425949A1 publication Critical patent/EP2425949A1/de
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Publication of EP2425949B1 publication Critical patent/EP2425949B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article

Definitions

  • the present invention relates to a mould container pressing device provided with a support device, such a support device and a method for manufacture thereof.
  • the invention relates more particularly to a mould container pressing device for manufacturing green bricks from clay for the brick manufacturing industry, comprising:
  • Bricks can be supplied in different height dimensions.
  • a frequently applied type of brick is the 'Waal' brick variety size with a height of 50 mm.
  • Brick varieties with differing heights can however also be supplied, such as the 'Vecht' variety, 40 mm in height, the 'Renova' variety, 55 mm in height and the 'Thick Waal' variety, 65 mm in height.
  • Extreme height dimensions can be found in the 'Lilliput II' variety with a height of 30 mm and the 'Kloostermop' variety with a height of 85 mm.
  • Paving bricks can be supplied with a height of 100 mm.
  • the height of the brick has to be adapted.
  • the height of the green brick to be formed has to be modified for this purpose in the production process of a mould container press.
  • a mould container press consists of a circulating conveyor formed from connected mould conveyor parts, wherein each mould conveyor part comprises one or more mould containers, each with a mould cavity.
  • a typical mould container press consists of about 50 mould conveyor parts, with 24 mould containers, each with a mould cavity, per mould container part.
  • each mould container part Arranged in each mould container part are ejectors for pressing out of the respective mould container the green bricks formed therein.
  • the depth of the mould cavity of the mould containers is defined in that a base of the ejectors which is movable in the mould container supports against a support body arranged thereunder.
  • the movable base is generally arranged on an ejector, and is therefore referred to below as ejector base.
  • Each ejector base is provided with legs with which the ejector base supports on one or more support bodies. Using the ejector the green brick formed in the mould container is released in order to be subsequently dried and fired.
  • a mould container press consisting of 50 mould container parts with 24-brick mould container parts has no less than 1200 mould containers, each with a mould cavity.
  • per mould container one or more. elongates support bodies having a stepped form as seen in side view.
  • Two strips - one for each side of the ejector bases - generally have to be shifted per mould container.
  • the number of manual operations for adjusting the height dimension of 1200 mould containers is reduced to 2 x 50, or 100 operations.
  • the height dimension of the green bricks to be formed can hereby be adjusted for a whole mould conveyor within 30 minutes working time.
  • a 24-brick mould container part requires that no less than 4 x 24, or 96 block parts - divided over two support bodies - have to be welded.
  • each block part is welded with at least two welds, and preferably with four all-round welds. This is a total of at least 9600 welds!
  • welding has a further significant drawback. This is because the buildup of heat associated with the welding regularly results in curving of the strip part of the support body. If this occurs, a further processing is required.
  • the mutual distance between the block parts has to be so precise that, when the support body is shifted, all legs of the ejector bases will support at the same height level. This means that all legs of the ejector bases either support on the plate part or on block parts welded thereon. In short, all 4800 block parts have to be welded at exactly the correct positions to the strip of the support body.
  • An object of the present invention is to provide a device and method wherein the stated drawbacks do not occur, or at least do so to lesser extent.
  • the mould container pressing device referred to in the preamble for manufacturing green bricks from clay for the brick manufacturing industry with a support device, comprising:
  • the recesses extend over the whole plate thickness of the step plate part and thus form a step height corresponding to the plate thickness of the step plate part in which the recesses are arranged.
  • the plate thickness of the step plate part thus determines the step height of the stepped support surface.
  • Plate parts can be supplied in many plate thicknesses. By applying, as base, plate parts with a plate thickness of the desired step height further machining operations in respect of the step height are unnecessary. An accurate step height can hereby be realized in very simple manner.
  • Recesses are arranged in the step plate parts, for instance by means of laser cutting technique. Although this can be realized very accurately and efficiently with a CNC machine, it is noted that the accuracy of the cut surfaces of the recesses is of minor importance. This is because only the plate thickness is relevant for and determines the step height.
  • the support device further comprises a second step plate part with a plate thickness
  • a three-step support surface can be realized by applying two step plate parts.
  • the recesses in the first and second step plate parts are arranged above each other at least partially, and preferably substantially over the whole length of the shortest recess.
  • the recesses in lengthwise direction of the second step plate part are substantially longer than the recesses arranged in lengthwise direction of the first step plate part, so that the upper sides of the base plate part and the step plate parts together form a three-step support surface.
  • a stepped support surface to be formed does not preclude intermediate step plate parts also being applied, wherein the recesses of these intermediate step plate parts are slightly shorter in lengthwise direction than the recesses arranged in a step plate part lying thereabove, while the recesses of these intermediate step plate parts are also longer than the recesses of a step plate part lying thereunder.
  • the support device is provided with one or more further step plate parts, the further step plate parts comprising:
  • the base plate part and the one or more step plate parts have substantially the same length and width dimensions.
  • the one or more step plate parts and the base plate part can hereby be assembled in simple manner to form a plate part package, the plate parts of which can be easily attached to each other.
  • the invention further relates to a support device for setting the height of a green brick to be formed and intended for use in a mould container pressing device for manufacturing green bricks from clay for the brick manufacturing industry as described above, the support device comprising:
  • a stop of an injector of a mould container pressing device can support on the stepped support surface.
  • the step height corresponds to the plate thickness of the step plate part which is provided with recesses and arranged on top of the base plate part.
  • the invention further relates to a method for manufacturing a support device as described in the foregoing, the method comprising the steps of:
  • the recesses are cut out with lasers.
  • punching can be envisaged for limited plate thicknesses
  • the recesses are preferably cut out with lasers. Controlled by a CNC machine, this can take place in very precise and automated manner.
  • a preferred embodiment of the method further comprises the step of arranging the first step plate part on a base plate part such that the upper sides of the base plate.part and the first step plate part together form a stepped support surface, wherein the step height is determined by the plate thickness of the first step plate part.
  • a preferred embodiment of the method further comprises the step of arranging the second step plate part on the first step plate part such that the upper sides of the base plate part and the step plate parts together form a stepped support surface, wherein the step height of the steps is determined by the plate thicknesses of the first and second step plate parts.
  • a preferred embodiment of the method further comprises the step of arranging one or more further step plate parts on the second step plate part such that the step plate part with the smallest recess is subsequently arranged in each case on the preceding step plate part such that the upper sides of the base plate part and the step plate parts arranged thereon together form a stepped support surface.
  • a preferred embodiment of the method further comprises the step of mutually attaching the base plate part and the one or more step plate parts arranged thereon.
  • the base plate part and the one or more step plate parts arranged thereon are attached releasably to each other so that one or more step plate parts can be replaced and/or can be exchanged for a step plate part with another plate thickness.
  • a releasable attachment can for instance be realized by making drilled holes in the base plate part and the step plate parts through which a bolt connection can be placed, although other variants can also be envisaged.
  • Figure 1 shows a mould container pressing device 1 for manufacturing green bricks.18 from clay for the brick manufacturing industry, comprising a circulating conveyor 2 formed from connected mould container parts 3, wherein each mould container part 3 comprises one or more mould containers 16, each with a mould cavity 19, a reservoir 4 for clay arranged above mould containers 16, clay arranging means for arranging clay from reservoir 4 in mould containers 16 during a moulding stage, means for covering an open side of mould containers 16 with take-off plates 11, at least one ejecting device 20 arranged on conveyor 2 and movable relative to conveyor 2, wherein ejecting device 20 is adapted to eject a green brick 18 present in mould container 16 onto an associated take-off plate 11 during a release stage, wherein ejecting device 20 comprises at least one base 38 which is displaceable in mould container 16 and which supports during the moulding stage with legs 42 functioning as spacers against a stepped support device 22, wherein using an adjustable support height the height of the green brick 18 to be formed in mould container 16 is adjustable via the depth of mould container 16.
  • Device 1 for manufacturing green bricks for the brick' manufacturing industry comprises a chain conveyor 2, also referred to as mould conveyor.
  • This chain conveyor 2 is assembled from a large number of mutually connected mould container parts 3, each comprising a number of mould containers 16.
  • the mould container parts 3 are provided in each case with sixteen mould containers 16.
  • Each mould container 16 comprises a mould cavity 19 in which clay can be received for the purpose of forming a green brick 18.
  • Mould container parts 3 are coupled to each other and provided with rollers 15 rotatable over girders 14 so as to together thus form the chain - or conveyor - of chain conveyor 2 - or mould conveyor.
  • the chain is driven by one of the chain wheels 13 or by both chain wheels 13 (wherein for the sake of clarity only the right-hand chain wheel is shown in figure 1 ).
  • the transporting direction of the chain conveyor is to the left in the shown embodiment of figure 1 (P 1 in figure 1 ).
  • a conveyor rotating to the right is of course likewise possible.
  • a reservoir 4 for clay Placed above mould containers 16 is a reservoir 4 for clay which is kept in continuous movement by an agitator 5 driven by motor 6. Clay is fed to reservoir 4 by a circulating conveyor 7. The clay is carried out of reservoir 4 into mould container 16 and then pressed down by a pressing device 8 which is pivotable around a shaft 9. The excess clay is also trimmed using means which are not drawn.
  • the device 1 further comprises a conveyor 10 with which take-off plates 11 are supplied. Conveyor 10 also ensures that a take-off plate 11 is placed on top of each passing mould container part 3. Take-off plates 11 remain pressed against the respective mould container parts 3 by a holding mechanism 12 when they pass over the left-hand chain wheel (not shown) on the discharge side of the device. After turning over of the mould container part 3, the green bricks 18 still lie on plates 11.
  • An ejecting device 20 as shown in figures 2 and 4 presses the green bricks 18 out of mould containers 16 per mould container part 3. Green bricks 18 herein remain lying on plates 11 after they have been released from mould containers 16. Plates 11 with green bricks 18 thereon are then discharged for further treatment, such as drying and firing.
  • FIGS 2 and 3 show a prior art embodiment. Shown in figure 2 is a mould container 16 in a mould container part 3 in which an ejecting device 20 provided with a prior art support device 22 is arranged.
  • Figure 4 shows a mould container 16 in a mould container part 3 in which an ejecting device 20 provided with a support device 22 to according to the present invention is arranged.
  • Mould container part 3 is assembled from different mould containers 16 connected to form a unit. Mould container part 3 further comprises a chain part 44 onto which link parts 46 are welded. When different mould container parts 3 with chain parts 44 are placed adjacently of each other and a shaft 52 is inserted through the link parts, these mould container parts 3 are connected to form a chain conveyor 2. Situated on the end of shaft 52 is a runner 48. A bolt 56 is also provided to lock the shaft 52 through link parts 46.
  • Ejecting device 20 is assembled from an ejector base 38 and an ejector shaft 36 which has at least on its side remote from ejector base 38 a stop in the form of cap nut 64.
  • Ejector base 38 is arranged displaceably in mould container 16 of mould container part 3.
  • a spring 62 Arranged round ejector shaft 36 is a spring 62 which engages with its outer end 72 on an edge of the cap nut 64 screwed onto an outer end of ejector shaft 36 provided with screw thread.
  • Support device 22 can be clamped releasably using a bolt 56, which is biased with a compression spring 58 against lower wall 54 of mould container part 3. By temporarily releasing the clamping the support device 22 is displaceable in lengthwise direction of mould container part 3 so that the stops 42 located on the underside of ejector base 38 support as desired on a selected step of the stepped support surface of support device 22. Stops 42 function here as spacer and thus determine the depth of the mould cavity 19 in which a green brick 18 is formed.
  • Support device 22 is shown in more detail in figures 5 and 6 , and comprises a substantially elongate base plate part 24 and a substantially elongate first step plate part 26, wherein both plate parts 24, 26 comprise an upper side B, an underside O, end surfaces K, a front side V and a rear side A, wherein the first step plate part 26 comprises a plate thickness D 26 and is provided at regular distances with recesses U 26 , wherein the first step plate part 26 is arranged with its underside O 26 against the upper side B 24 of base plate part 24, and wherein the upper sides B 24 , B 26 of base plate part 24 and the first step plate part 26 together form a stepped support surface on which the bases 38 displaceable in mould containers 16 can be supported.
  • a step plate part 28 is also provided with a plate thickness D 28 which is provided at regular distances with recesses U 28 which are substantially longer in lengthwise direction of the second step plate part 28 than the recesses U 26 arranged in lengthwise direction of the first step plate part 26.
  • the second step plate part 28 is arranged with its underside O 28 against the upper side B 26 of the first step plate part 26, whereby the upper sides B 24 , B 26 , B 28 of base plate part 24 and the step plate parts 26, 28 together form a three-step support surface.
  • the exploded view of figure 6 shows how recesses U 26 and U 28 in respectively the first and second step plate parts are arranged one above the other at least partially, and preferably substantially over the whole length of the shortest recess, in this case U 26 .
  • a stepped support surface is hereby formed in the assembled situation of plate parts 24, 26, 28.
  • a thickness D 26 of the first step plate part 26 of 5 mm and a thickness D 28 of the second step plate part 29 of 10 mm bricks in 'Waal' variety, 'Renova' variety and 'Thick Waal' variety, with respective brick heights of 50 mm, 55 mm and 65 mm, can be realized with the embodiment shown in figures 5 and 6 .
  • step plate parts with plate thicknesses of 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65 and 70 mm, since all varieties of brick referred to in the introduction, from the 'Lilliput II' variety with a brick height of 30 mm to a paving brick with a brick height of 100 mm, can hereby be realized.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)

Claims (14)

  1. Haltevorrichtung (22) zum Einstellen der Höhe eines zu formenden Steinformlings, umfassend
    - einen im Wesentlichen länglichen Grundplattenteil (24) und einen im Wesentlichen länglichen ersten Stufenplattenteil (26), wobei beide Plattenteile (24, 26) eine Oberseite (B), eine Unterseite (O), Stirnflächen (K), eine Vorderseite (V) und eine Rückseite (A) umfassen,
    dadurch gekennzeichnet,
    - dass der erste Stufenplattenteil (26) eine Plattendicke (D26) aufweist und in regelmäßigen Abständen mit Ausnehmungen (U26) versehen ist,
    - dass der erste Stufenplattenteil (26) mit seiner Unterseite (O26) gegenüber der Oberseite (B24) des Grundplattenteiles (24) angeordnet ist
    - und dass die Oberseiten (B24, B26) des Grundplattenteiles (24) und des ersten Stufenplattenteiles (26) zusammen eine gestufte Haltefläche bilden, wobei die Stufenhöhe durch die Plattendicke (D26) des ersten Stufenplattenteiles (26) bestimmt ist.
  2. Haltevorrichtung nach Anspruch 1, ferner umfassend
    - einen zweiten Stufenplattenteil (28) mit einer Plattendicke (D28),
    - wobei der zweite Stufenplattenteil (28) in regelmäßigen Abständen mit Ausnehmungen (U28) versehen ist,
    - wobei der zweite Stufenplattenteil (28) mit seiner Unterseite (O28) gegenüber der Oberseite (B26) des ersten Stufenplattenteiles (26) angeordnet ist und
    - wobei die Oberseiten (B24, B26, B28) des Grundplattenteiles (24) und der Stufenplattenteile (26, 28) zusammen eine gestufte Haltefläche bilden, wobei die Stufenhöhe der Stufen durch die Plattendicken (D26, D28) der ersten und zweiten Stufenplattenteile (26, 28) bestimmt ist.
  3. Haltevorrichtung nach Anspruch 2, wobei die Ausnehmungen (U28) in Längsrichtung des zweiten Stufenplattenteiles (28) wesentlich länger sind als die Ausnehmungen (U26), die in Längsrichtung des ersten Stufenplattenteiles (26) angeordnet sind, derart, dass die Oberseiten (B24, B26, B28) des Grundplattenteiles (24) und der Stufenplattenteile (26, 28) zusammen eine Drei-Stufen-Haltefläche bilden.
  4. Haltevorrichtung nach Anspruch 2 oder 3, wobei die Haltevorrichtung (22) mit einem oder mehreren weiteren Stufenplattenteilen versehen ist, wobei die weiteren Stufenplattenteile umfassen:
    - eine Plattendicke und
    - Ausnehmungen, die in regelmäßigen Abständen angeordnet sind und die in Längsrichtung des weiteren Stufenplattenteiles wesentlich länger sind als Ausnehmungen, die in Längsrichtung in einem darunter liegenden Stufenplattenteil angeordnet sind, derart, dass die Oberseiten des darunterliegenden Stufenplattenteiles und des weiteren Stufenplattenteiles zusammen eine gestufte Haltefläche bilden.
  5. Haltevorrichtung nach einem der Ansprüche 1 bis 4, wobei der Grundplattenteil (24) und der eine oder die mehreren Stufenplattenteile (26, 28) im Wesentlichen dieselben Längen- und Breitenabmessungen aufweisen.
  6. Formbehälter-Pressvorrichtung (1) zum Herstellen von Steinformlingen (18) aus Ton für die Ziegelindustrie, umfassend:
    - eine umlaufende Fördereinrichtung (2), die aus verbundenen Formfördereinrichtungsteilen (3) gebildet ist, wobei jeder Formfördereinrichtungsteil (3) einen oder mehrere Formbehälter (16) jeweils mit einem Formhohlraum (19) umfasst,
    - zumindest eine Ausstosseinrichtung (20), die an der Fördereinrichtung (2) angeordnet und relativ zu der Fördereinrichtung (2) bewegbar ist und die geeignet ist, einen in dem Formbehälter (16) vorhandenen Steinformling (18) während einer Freigabestufe auszustoßen,
    - wobei die Ausstoßeinrichtung (20) zumindest ein Grundteil (38) umfasst, welches in dem Formbehälter (16) verschiebbar ist und welches sich während der Formungsstufe gegen eine gestufte Haltevorrichtung (22) abstützt, wobei bei Anwendung einer einstellbaren Haltehöhe die Höhe des in dem Formbehälter (16) zu formenden Steinformlings (18) durch die Tiefe des Formbehälters (16) eingestellt werden kann, und
    - wobei die Formbehälter-Pressvorrichtung (1) eine Haltevorrichtung nach einem der Ansprüche 1 bis 5 umfasst.
  7. Formbehälter-Pressvorrichtung nach Anspruch 6, wobei der Grundplattenteil (24) und der eine oder die mehreren Stufenplattenteile (26, 28) im Wesentlichen dieselben Längen- und Breitenabmessungen aufweisen.
  8. Verfahren zum Herstellen einer Haltevorrichtung (22), wie sie in einem oder mehreren der Ansprüche 1 bis 5 beschrieben ist, dadurch gekennzeichnet, dass es den Schritt umfasst:
    - Anordnen von Ausnehmungen (U) in regelmäßigen Abständen in einem oder mehreren Plattenteilen (26, 28).
  9. Verfahren nach Anspruch 8, wobei die Ausnehmungen mit Lasern ausgeschnitten werden.
  10. Verfahren nach den Ansprüchen 8 bis 9, ferner umfassend den Schritt:
    - Anordnen des ersten Stufenplattenteiles (26) auf einem Grundplattenteil (24), derart, dass die Oberseiten (B24, B26) des Grundplattenteiles (24) und des ersten Stufenplattenteiles (26) zusammen eine gestufte Haltefläche bilden, wobei die Stufenhöhe durch die Plattendicke (D26) des ersten Stufenplattenteiles (26) bestimmt wird.
  11. Verfahren nach Anspruch 10, ferner umfassend den Schritt:
    - Anordnen des zweiten Stufenplattenteiles (28) auf dem ersten Stufenplattenteil (26), derart, dass die Oberseiten (B24, B26, B28) des Grundplattenteiles (24) und der Stufenplattenteile (26, 28) zusammen eine gestufte Haltefläche bilden, wobei die Stufenhöhe der Stufen durch die Plattendicken (D26, D28) der ersten und zweiten Stufenplattenteile (26, 28) bestimmt wird.
  12. Verfahren nach Anspruch 11, ferner umfassend den Schritt:
    - Anordnen eines oder mehrerer weiterer Stufenplattenteile auf dem zweiten Stufenplattenteil (28), derart, dass der Stufenplattenteil mit der kleinsten Ausnehmung im Wesentlichen in jedem Fall auf dem vorhergehenden Stufenplattenteil angeordnet ist, derart, dass die Oberseiten des Grundplattenteiles (24) und der darauf angeordneten Stufenplattenteile zusammen eine gestufte Haltefläche bilden.
  13. Verfahren nach einem der Ansprüche 8 bis 12 ferner umfassend den Schritt:
    - gegenseitiges Anbringen des Grundplattenteiles und des einen oder der mehreren darauf angeordneten Stufenplattenteile.
  14. Verfahren nach Anspruch 13, wobei der Grundplattenteil und der eine oder die mehreren darauf angeordneten Stufenplattenteile lösbar aneinander angebracht sind, derart, dass eines oder mehrere Stufenplattenteile durch ein Stufenplattenteil mit einer anderen Plattendicke ersetzt und/oder ausgetauscht werden kann bzw. können.
EP11176822.2A 2010-08-11 2011-08-08 Haltevorrichtung einer Steinformling-Presse, und Herstellungsverfahren dafür Not-in-force EP2425949B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2005213A NL2005213C2 (nl) 2010-08-11 2010-08-11 Een van een steuninrichting voorziene vormbak-persinrichting, alsmede een dergelijke steuninrichting en werkwijze voor de vervaardiging daarvan.

Publications (2)

Publication Number Publication Date
EP2425949A1 EP2425949A1 (de) 2012-03-07
EP2425949B1 true EP2425949B1 (de) 2016-03-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106042155A (zh) * 2016-08-12 2016-10-26 郑州远东耐火材料有限公司 砂板制作自动化装置
NL2019422B1 (nl) * 2017-08-16 2019-02-25 Beheermaatschappij De Boer Nijmegen B V Een van een steun voorziene vormbak-persinrichting, alsmede een dergelijke steun en werkwijze voor de vervaardiging daarvan
CN115416148A (zh) * 2022-10-11 2022-12-02 绍兴市强舜新能源有限公司 一种环保砖全自动制备养护循环系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB257112A (en) * 1925-09-26 1926-08-26 Whittaker And Company Ltd C Improvements in brick making machinery
US3079661A (en) * 1961-03-06 1963-03-05 Crossley Machine Company Inc Automatic thickness control means for flat products
DE2264247A1 (de) * 1972-12-30 1974-07-11 Krupp Gmbh Verfahren zur herstellung von formlingen
NL1006041C2 (nl) * 1997-05-13 1998-11-19 Struyk Verwo Groep B V Werkwijze en inrichting voor het vervaardigen van betonnen voorwerpen.
US6468065B1 (en) * 1999-09-29 2002-10-22 Anvil Iron Works, Inc. Brick molding apparatus
NL1026193C2 (nl) * 2004-05-13 2005-11-15 Beheermij De Boer Nijmegen Bv Inrichting voor het vervaardigen van vormelingen.

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EP2425949A1 (de) 2012-03-07

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