EP3730261B1 - Dispositif et procédé de production de corps en béton - Google Patents

Dispositif et procédé de production de corps en béton Download PDF

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Publication number
EP3730261B1
EP3730261B1 EP20171088.6A EP20171088A EP3730261B1 EP 3730261 B1 EP3730261 B1 EP 3730261B1 EP 20171088 A EP20171088 A EP 20171088A EP 3730261 B1 EP3730261 B1 EP 3730261B1
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EP
European Patent Office
Prior art keywords
reservoir
concrete
mould
cavities
exit
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.)
Active
Application number
EP20171088.6A
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German (de)
English (en)
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EP3730261A1 (fr
Inventor
Bert PANIS
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.)
Ebema NV
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Ebema NV
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Publication of EP3730261A1 publication Critical patent/EP3730261A1/fr
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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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
    • B28B13/023—Feeding the moulding material in measured quantities from a container or silo by using a feed box transferring the moulding material from a hopper to the moulding cavities
    • 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
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B28B13/0215—Feeding the moulding material in measured quantities from a container or silo
    • B28B13/022—Feeding several successive layers, optionally of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds
    • B30B15/306—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds for multi-layer articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space

Definitions

  • the present invention relates to a device and method for manufacturing concrete articles.
  • the invention is intended for manufacturing concrete articles by compressing a non-hardened concrete composition.
  • these concrete articles can be stones, paving stones or tiles, but other articles are not excluded according to the invention.
  • a device for manufacturing concrete articles is already known from US 2015/0115492 in which concrete articles are manufactured from different sorts of concrete by pouring the different sorts of concrete from a reservoir with a base plate and with movable separators in a mould, whereby after removing the base plate the different sorts of concrete, together with the movable separators end up in the mould cavity, after which the separators are vertically removed for compressing.
  • US 2008/199707 discloses a device for pouring concrete articles in accordance with the preamble of claim 1.
  • a disadvantage of this is that it contains relatively complex and a relatively large number of moving parts such as the base and movable separators that must be able to be moved up and down by means of a mechanism.
  • the known device is intended mainly for making concrete building bricks, the side section of which shows different colour zones.
  • This device is less suitable for manufacturing tiles, the top surface of which shows different colour zones which are sharply defined.
  • a certain quantity of non-hardened concrete composition is poured into a cavity of a mould provided for this purpose, which subsequently is compressed by means of a stamp with a corresponding form.
  • the mould is also called a moulding plate and at the bottom is sealed by a separate base plate such that, when the stamp compresses the concrete composition and subsequently the moulding plate is moved upward, the thus moulded concrete article remains on the base plate.
  • a disadvantage of such known methods is that they do not allow concrete articles to be produced whereby different sorts or types of concrete are combined separately next to each other in one concrete article, whereby there is a fixed straight separating line between the different sorts of concrete on the upperside of the concrete article.
  • the cavity must be filled, simultaneously or not, with the different sorts of concrete. It goes without saying that without further measures a fixed straight separating line between the different sorts of concrete can never be obtained.
  • the purpose of the present invention is to provide a solution to one or more of the aforementioned and other disadvantages by providing a device and method which allows a concrete article to be manufactured whereby different sorts or types of concrete are combined separately next to each other.
  • the object of the present invention is a device for pouring concrete articles such as tiles or the like, said device comprising a reservoir for concrete with an open base which forms an exit through which the concrete can leave the reservoir, wherein the reservoir comprises at least two spaces for concrete separated from each other, whereby the spaces are separated by a fixed wall which extends with a protruding section downward beyond or outside the exit and divides said exit into an exit for each space on either side of the wall, whereby the device is provided with at least one supporting platform with at least one mould adjoining thereto or therein with an upperside which when pouring the article is located in the same plane as the supporting platform and which is provided with one or more cavities, whereby each cavity has the negative form of an article to be moulded, and whereby the reservoir is movable in relation to the supporting platform and the mould between a filling position, whereby the reservoir rests with its open base on the supporting platform and a pouring position, whereby the reservoir with said exits of the at least two spaces is located above at least one mould cavity and whereby in the
  • This provides the advantage that two or more sorts of concrete can be poured into the reservoir separately from each other, thanks to the different spaces.
  • the different sorts of concrete may for example differ in composition or colour. It is also possible that the surface structure of the hardened concrete is different in that different aggregates are used.
  • the divided exit means the two sorts of concrete can fall simultaneously and separately from each other in a mould cavity whereby the wall in the exit will ensure the separation between both sorts of concrete.
  • the fixed wall partially extends beyond or outside the exit.
  • the device also comprises at least one mould with one or more cavities, whereby the reservoir is configured to be moved with its exit over the mould cavities or whereby the mould is configured to be moved with its cavities under the exit of the reservoir.
  • a groove is provided in the mould in which the wall can slide.
  • the reservoir is executed as an open container with an open base that serves as said exit, whereby in the open container said wall is made as a separator between the spaces and as wall dividing the exit.
  • Another advantage of such fixed wall is that no mechanism must be provided for moving the wall up and down to obtain a clear separation.
  • the advantage of such execution is that the reservoir can be filled easily and that there is a big exit opening, such that it is guaranteed the mould cavities are completely filled when the exit moves over it.
  • the invention also relates to a method for pouring concrete articles such as tiles or the like, wherein a device is used according to any one of the previous embodiments and that the method comprises the following steps:
  • the device 1 schematically shown in figure 1 according to the invention for pouring concrete articles such as tiles or the like essentially comprises a reservoir 2 for concrete 3 and, in this case, also a mould 4 with one or more cavities 5.
  • the mould 4 has two cavities 5, but this can also be only one cavity 5 or more than two cavities 5, whereby each cavity 5 of the mould 4 has the negative form of an article to be moulded 25.
  • moulds 4 are provided.
  • these moulds 4 can be set up behind each other, such as can be the case for example in a production line.
  • the reservoir 2 comprises an exit 6 through which the concrete 3 can leave the reservoir 2, and comprises at least two spaces 7a, 7b for concrete 3 separated from each other.
  • Said spaces 7a, 7b are connected to the exit 6, whereby a straight and fixed wall 8 divides the exit 6 into two parts 6a, 6b.
  • said wall 8 also serves as separator 8 between said spaces 7a, 7b of the reservoir 2.
  • the fixed wall 8 continues from the reservoir 2 to beyond the exit 6, such that the reservoir 2 comprises at least two spaces 7a, 7b for concrete 3 separated by a wall 8, whereby the spaces 7a, 7b are connected to the exit 6, whereby the wall 8 continues to outside the exit 6, such that the exit 6 is divided into two parts 6a, 6b.
  • the reservoir 2 is executed as a sort of open container 9 with an open base 10 which serves as said exit 6. It is understood that this is only one possible embodiment.
  • the device 1 also comprises one or more supporting platforms 11 which were mounted before and/or behind the mould 4.
  • the device 1 is provided with a supporting platform 11 with adjoining thereto or therein a mould 4, whereby the upperside of the mould 4 when pouring the article 25 is located in the same plane as the supporting platform 11.
  • the reservoir 2 is movable in relation to the supporting platform 11 and the mould 4 between a filling position, whereby the reservoir 2 rests with its open base 10 on the supporting platform 11 and a pouring position, whereby the reservoir 2 is located with said exits 6a, 6b of the at least two spaces 7a and 7b above at least one cavity 5 of the mould 4. In said pouring position the cavities 5 in the mould 4 do not contain any separation between the concrete 3 coming from adjacent spaces 7a and 7b of the reservoir 2.
  • the supporting platform 11 is provided with rails 12 and the reservoir 2 is provided with wheels 13 to travel on said rails 12.
  • the reservoir 2 is configured to be moved with its exit 6 over the cavities 5 of the mould 4.
  • Figure 3 shows a cross-section as shown in figure 2 , but whereby the reservoir 2 is moved and is located partially above the mould 4.
  • the reservoir 2 is executed as a so-called filling cart, which can drive over the mould 4 as it were.
  • the mould 4 can also be configured to be moved with its cavities 5 under the exit 6 of the reservoir 2, i.e. the reservoir 2 is set up to be unmovable.
  • the fixed wall 8 can protrude with an edge 14 approximately half to five centimetres outside or beyond the exit 6. It is not excluded that the wall 8 protrudes less than half or more than five centimetres outside or beyond the exit 6, this will depend mainly on the dimensions of the eventual concrete article 25 to be manufactured.
  • said supporting platform 11 is provided with a continuous groove 15 for guiding the downward protruding edge 14 of the fixed wall 8 when the reservoir 2 is travelling.
  • the bottom edge 14 of the fixed wall 8 is executed in a V-shape with a sharp downward pointing tip to form a sharply defined groove which forms a separation between the concrete on either side of the groove formed in the upper surface.
  • the groove 15 in the supporting platform and the mould 4 have a complementary form to said bottom edge 14.
  • Said groove 15 continues into the one or more moulds 4 to form a separation in the upper surface of the poured article 25 in the mould 4 between the concrete 3 coming from two adjacent spaces 7a and 7b of the reservoir 2.
  • groove 15 is at least as deep as the protruding edge 14 of the wall 8.
  • the mould 4 in this embodiment it is made from the moulding plate 16 in which the one or more cavities 5 are made and a separate bottom plate 17 which forms the base of the cavities 5.
  • the device 1 is also provided with means 18 to lift up the moulding plate 16 and means 19 to exchange the bottom plates 17.
  • Said means can be either mechanical or robotic means 18, 19 in a production line or the like, but can also for example be handles 20 to manually lift the moulding plate 16 or handles 20 to be able to take away, slide or lift the bottom plate 17.
  • the operation of the device 1 for manufacturing concrete articles is very simple and as follows.
  • Each space of the reservoir is filled with the desired sorts of concrete in the filling position.
  • both types or sorts of concrete 3 will be poured simultaneously into the cavity 5.
  • the protruding wall 8 means both types of concrete 3 will end up in the one or more cavities 5 separately from each other.
  • the reservoir 2 After pouring the concrete, the reservoir 2 will leave the pouring position and free the mould 4 cavities 5 by moving to the next supporting platform 11 or returning to the supporting platform 11 where it came from, all this depending on the arrangement of the production line. This means that the reservoir 2 is no longer located over or above the mould 4.
  • the reservoir 2 After leaving the pouring position, the reservoir 2 can be moved back to the filling position where the reservoir 2 can be filled again.
  • the concrete 3 can be compressed. So-called stamps 22 are used for this.
  • the device 1 is provided with one or more stamps 22 which can be moved up and down into the cavities 5 of the mould 4.
  • stamps 22 as there are cavities 5 in the mould 4 can be provided for this. If there are several moulds 4, for example in a production line, the stamps 22 can be moved from mould 4 to mould 4 or the moulds 4 can be successively moved under the stamps 22.
  • the stamps 22 will be lowered toward the moulds 4 to compress or press the concrete 3 in the cavities 5.
  • the stamps 22 are provided with a linear protruding profiling 24 on their underside 23 which is in line with the geometric plane of the wall 8 of the reservoir 2.
  • the stamp 22 will press in said separating line 21 of the concrete 3 to realise a fixed separating line of preferably 2 to 3 mm.
  • the moulding plate 16 and the stamp 22 are lifted up, as shown in figures 7 and 8 .
  • the bottom plate 17 remains in place, together with the thus created compressed concrete articles 25, which in this case are tiles 25.
  • Said bottom plate 17 can be removed and taken to a drying place where the tiles 25 can dry.
  • a new bottom plate 17 or bottom plates 17 can be installed and the moulding plate 16 or other moulding plates 16 can be lowered again or moulding plates 16 can be lowered when one wants to make other concrete articles 25.
  • the device 1 is provided with a second reservoir 2 for concrete 3, similar to the first reservoir 2 described above, but with that difference that it only comprises one space 7a, 7b for concrete 3, i.e. is not provided with a wall 8.
  • the second reservoir 2 can be used to first pour a so-called core concrete 3 in the mould 4, whereby it will be the first to travel over the mould 4, after which subsequently the first reservoir 2 will travel over the mould 4 to pour the two sorts of concrete 3 over the core concrete 3, whereby here also a fixed separating line 21 between both sorts of concrete 3 will be obtained.
  • core concrete 3 is the same as one of the two types of concrete 3 in the first reservoir 2.
  • both reservoirs 2 travel behind each other, successively over the mould 4 or a series of moulds 4 placed behind each other, but it is also possible that a reservoir 2 is installed on either side of the mould 4, whereby first the second reservoir 2 travels back and forth over the mould 4 to pour the core concrete 3, after which subsequently the first reservoir 2 travels back and forth over the mould 4 to pour the two types of concrete 3. Subsequently the method can be continued as described above.

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

Claims (16)

  1. Dispositif destiné à la fabrication par versement d'articles en béton (25) tels que des carreaux ou analogues, le dispositif (1) en question comprenant un réservoir (2) prévu pour du béton (3) qui possède une base ouverte qui forme une sortie (6) à travers laquelle le béton (3) peut quitter le réservoir (2), dans lequel le réservoir (2) comprend au moins deux espaces (7a, 7b) destinés à du béton (3), qui sont séparés l'un de l'autre, dans lequel les espaces (7a, 7b) sont séparés par une paroi fixe (8) qui s'étend avec un tronçon faisant saillie en étant orienté vers le bas au-delà ou à l'extérieur de la sortie (6) et qui subdivise ladite sortie en une sortie (6a, 6b) pour chaque espace (7a, 7b) de chaque côté de la paroi (8), dans lequel le dispositif (1) est équipé d'au moins une plateforme de support (11) à laquelle ou dans laquelle s'adjoint au moins un moule (4) qui comprend un côté supérieur qui, au cours de la fabrication de l'article (25) par versement, est situé dans le même plan que celui de la plateforme de support (11) et qui est muni d'une ou de plusieurs cavités (5), dans lequel chaque cavité possède la forme négative d'un article (25) qui doit être moulé, et dans lequel le réservoir (2) est mobile par rapport à la plateforme de support (11) et par rapport au moule (4), entre une position de remplissage dans laquelle le réservoir (2) s'appuie avec sa base ouverte sur la plateforme de support (11) et une position de versement dans laquelle le réservoir (2) avec lesdites sorties (7a et 7b) desdits au moins deux espaces est situé au-dessus d'au moins une cavité (5) du moule (4), caractérisé en ce que, dans la plateforme de support (11), est prévue une rainure continue (15) destinée au guidage du bord inférieur (14) de la paroi fixe (8) qui possède une extrémité pointue (14) orientée vers le bas et à la mise en mouvement du réservoir (2), ladite rainure (15) se prolongeant jusque dans lesdits un ou plusieurs moules (4) afin de former une séparation dans la surface supérieure de l'article (25) fabriqué par versement dans le moule (4) entre le béton qui provient de deux espaces adjacents (7a et 7b) du réservoir (2).
  2. Dispositif conformément à la revendication 1, caractérisé en ce que le dispositif (1) comprend également au moins un moule (4) qui comprend une ou plusieurs cavités (5), dans lequel le réservoir (2) est configuré pour une mise en mouvement avec sa sortie (6) par-dessus les cavités (5) du moule (4) ou dans lequel le moule (4) est configuré pour une mise en mouvement avec ses cavités (5) en dessous de la sortie (6) du réservoir.
  3. Dispositif conformément à la revendication 1, caractérisé en ce que le moule (4) comprend une plaque de moulage (16) qui comprend une ou plusieurs cavités (5) et une plaque inférieure séparée et échangeable (17) qui forme la base des cavités (5).
  4. Dispositif conformément à la revendication 3, caractérisé en ce que le dispositif (1) est équipé de moyens (18) qui sont destinés à soulever les plaques de moulage (16) ainsi que de moyens (19) qui sont destinés à l'échange des plaques inférieures (17).
  5. Dispositif conformément à la revendication 4, caractérisé en ce que la plateforme de support (11) est équipée de rails (12) et en ce que le réservoir (2) est équipé de roues (13) qui peuvent se déplacer sur les rails (12).
  6. Dispositif conformément à l'une quelconque des revendications précédentes, caractérisé en ce que, dans ladite position de versement, les cavités (5) dans le moule (4) ne contiennent pas une séparation entre le béton (3) qui provient d'espaces adjacents (7a et 7b) du réservoir (2).
  7. Dispositif conformément à l'une quelconque des revendications précédentes, caractérisé en ce que le bord inférieur (14) de la paroi fixe (8) est de préférence réalisé en une configuration possédant la forme d'un V, dans lequel la rainure associée (15) possède de préférence une forme complémentaire à celle dudit bord inférieur (14).
  8. Dispositif conformément à l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif (1) est équipé d'un ou de plusieurs tampons (22) qui peuvent être soumis à un mouvement ascendant et descendant jusque dans les cavités (5) du moule (4) dans le but de comprimer le béton dans les cavités du moule.
  9. Dispositif conformément à la revendication 8, caractérisé en ce que, sur leur côté inférieur (23), les tampons (22) sont munis d'un profil linéaire faisant saillie (24) qui est disposé en ligne avec le plan géométrique de la paroi du réservoir.
  10. Dispositif conformément à l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif (1) est en outre muni d'un deuxième réservoir (2) prévu pour du béton (3), qui comprend une sortie (6) à travers elle laquelle le béton (3) peut quitter le réservoir (2), dans lequel le deuxième réservoir (2) comprend un seul espace (7a, 7b) prévu pour du béton (3).
  11. Procédé destiné à la fabrication par versement d'articles en béton tel que des carreaux ou analogues, dans lequel un dispositif (1) est utilisé en conformité avec l'une quelconque des revendications précédentes et dans lequel le procédé comprend les étapes suivantes dans lesquelles :
    - on procure au moins une plateforme de support (11) qui comprend au moins un moule (4) auquel vient/viennent s'adjoindre une ou plusieurs cavités (5), chacune avec une forme négative d'un article qui doit être moulé, dans lequel la plateforme de support (11) et le moule (4) sont munis d'une rainure continue (15) qui se prolonge jusque dans lesdits un ou plusieurs moules (4) ;
    - on procure un réservoir mobile (2) qui comprend une paroi fixe (8) qui, à la base, fait saillie vers le bas avec un tronçon ;
    - on monte le réservoir (2) sur la plateforme de support (11) dans une position de remplissage et on remplit chaque espace (7a et 7b) du réservoir (2) avec un béton sec (3), dans lequel, pour au moins deux espaces, on sélectionne une sorte différente de béton (3) ;
    - on verse le béton (3) dans le moule (4) en faisant passer le réservoir (2) avec du béton sec (3) de la position de remplissage à une position de versement au-dessus d'une ou de plusieurs cavités (5) du moule qui doivent être remplies, dans lequel le tronçon de la paroi (8) du réservoir (3) faisant saillie est guidé dans ladite rainure continue (4) ;
    - on libère les cavités (5) du moule (4) en faisant en sorte que le réservoir (2) quitte la position de versement.
  12. Procédé selon la revendication 11, dans lequel les différentes sortes de béton (3) dans le réservoir (2) sont versées de manière conjointe et de manière simultanée dans une ou plusieurs cavités (5) du moule (4) sans que l'on ne soit obligé de prévoir une séparation physique dans une ou plusieurs cavités (5) du moule (4).
  13. Procédé selon la revendication 11, dans lequel on procure un ou plusieurs tampons (22) qui sont destinés à comprimer le béton versé (3) dans une ou plusieurs cavités (5) du moule (4).
  14. Procédé selon la revendication 13, dans lequel les tampons (22) sont munis, sur leur côté inférieur (23), d'un profil linéaire faisant saillie (24) qui permet d'obtenir une ligne de séparation claire dans le béton.
  15. Procédé selon l'une quelconque des revendications 11 à 14, dans lequel le réservoir est équipé de roues (12) et les plateformes de support (11) ainsi que les moules (4) sont équipés de rails (13) par-dessus lesquels le réservoir (2) peut se déplacer avec ses roues (12).
  16. Procédé selon la revendication 11, dans lequel le moule (4) est équipé d'une ou de plusieurs plaques de moulage (16) qui comprennent une ou plusieurs cavités (5) et d'une ou de plusieurs plaques inférieures séparées et variables (17) qui forment la base des cavités (5).
EP20171088.6A 2019-04-26 2020-04-23 Dispositif et procédé de production de corps en béton Active EP3730261B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE20195283A BE1027229B1 (nl) 2019-04-26 2019-04-26 Inrichting en werkwijze voor het vervaardigen van betonnen artikelen

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EP3730261A1 EP3730261A1 (fr) 2020-10-28
EP3730261B1 true EP3730261B1 (fr) 2021-12-08

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CN112405817B (zh) * 2020-11-09 2022-07-01 浙江振阳绝热科技股份有限公司 一种瓦片料分离装置
CN114434591B (zh) * 2021-05-21 2023-06-16 江苏伟丰建筑安装集团有限公司 一种土木建筑工程用混凝土墙板定量浇筑设备
CN113858389B (zh) * 2021-10-26 2023-03-17 保定市泰华机械制造有限公司 一种砌块成型机
CN114147836B (zh) * 2021-11-26 2023-03-21 安徽马钢矿业资源集团南山矿业有限公司 制备蒸压加气混凝土板装置及制作加气混凝土板工艺

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US2208054A (en) * 1937-06-21 1940-07-16 Gordon W Reed Brick press
JPH0635127B2 (ja) * 1991-08-19 1994-05-11 株式会社後藤鉄工所 溝付タイルの成形装置
DE29611353U1 (de) * 1996-06-29 1996-10-24 Rampf Formen Gmbh Formvorrichtung zum Herstellen von Bausteinen mit je mindestens 2 Schichten unterschiedlicher Werkstoffe
JP5173208B2 (ja) * 2007-02-15 2013-04-03 ニチハ株式会社 無機質焼成体の製造方法
US9943980B2 (en) * 2013-03-15 2018-04-17 Four Points Developments Llc Multi zone cementitious product and method

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BE1027229A1 (nl) 2020-11-19
BE1027229B1 (nl) 2020-11-23
EP3730261A1 (fr) 2020-10-28

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