EP3718720B1 - Installation de fabrication de plaques pourvue de dispositif de refoulement - Google Patents

Installation de fabrication de plaques pourvue de dispositif de refoulement Download PDF

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Publication number
EP3718720B1
EP3718720B1 EP20163712.1A EP20163712A EP3718720B1 EP 3718720 B1 EP3718720 B1 EP 3718720B1 EP 20163712 A EP20163712 A EP 20163712A EP 3718720 B1 EP3718720 B1 EP 3718720B1
Authority
EP
European Patent Office
Prior art keywords
plate
carrier
carrier plate
spacer
mould
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
EP20163712.1A
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German (de)
English (en)
Other versions
EP3718720A1 (fr
Inventor
Robert Stöcker
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.)
SR Schindler Maschinen Anlagetechnik GmbH
Original Assignee
SR Schindler Maschinen Anlagetechnik GmbH
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by SR Schindler Maschinen Anlagetechnik GmbH filed Critical SR Schindler Maschinen Anlagetechnik GmbH
Publication of EP3718720A1 publication Critical patent/EP3718720A1/fr
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Publication of EP3718720B1 publication Critical patent/EP3718720B1/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
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • 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
    • B28B5/00—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping
    • B28B5/06—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping in moulds on a turntable
    • B28B5/08—Producing shaped articles from the material in moulds or on moulding surfaces, carried or formed by, in or on conveyors irrespective of the manner of shaping in moulds on a turntable intermittently rotated

Definitions

  • the present invention relates to an ejection device, that is in particular an ejection device for ejecting finished plates from a plate production plant.
  • a plate production system are known from the prior art. It is known that a material to be pressed is placed in a mold and this is pressed with a pressing device to form the panels.
  • the invention describes a so-called ejection device.
  • Such ejection devices are usually those devices that are intended to eject the already pressed plate from a mold.
  • DE 20 36 689 A1 discloses an apparatus and method for dispensing disks according to the preamble of claims 1 and 12, respectively.
  • the present invention is therefore based on the object of providing an ejection device for plate production systems which enables plates with an individual plate thickness to be ejected. In this case, damage to the plates during ejection should preferably be avoided as far as possible.
  • Slabs to be produced for such slab production plants could be, for example, terrazzo, concrete slabs, paving stones in hermetic quality, patio and pavement slabs or single-layer or two-layer or multi-layer slabs with a combined filter/hermetic pressing process.
  • Such production panel systems are, for example, hermetic presses. In such hermetic presses, depending on the design and setting, there is a pressure of between 4N/mm 2 and 20N/mm 2 .
  • Typical plate thicknesses are between 10 mm and 140 mm, for example.
  • a device according to the invention for dispensing plates has a mold that is suitable and intended for receiving a plate and an ejection device to press the plate out of the mold, the ejection device having a stamping device that can be displaced in a predetermined displacement direction, and a carrier plate which serves to receive the plate ejected from the mould.
  • the device has a spacer which, taking into account the thickness of the plate, displaces the carrier plate in the direction of displacement and/or only allows the carrier plate to be displaced up to a specific position.
  • This spacer is preferably designed in such a way that it causes a displacement of this carrier plate in the displacement direction in such a way that, on the one hand, the plate can be reliably pressed completely out of its shape and, on the other hand, the plate does not fall onto the carrier plate from too great a height, so that it is not destroyed.
  • This spacer can actively move the carrier plate, but it would also be possible for the spacer to only allow the carrier plate to be displaced up to a specific position.
  • the spacer device or the spacer is set so that a distance between the underside of the plate and the top of the Carrier plate is greater than 0.1 mm, preferably greater than 0.2 mm, preferably greater than 0.3 mm.
  • the spacer device or the spacer is preferably set in such a way that a distance in the displacement direction between the underside of the ejected plate and the upper side of the carrier plate is less than 10 mm, preferably less than 9 mm, preferably less than 8 mm, at the moment of ejection. preferably less than 7 mm, preferably less than 6 mm, preferably less than 5 mm, preferably less than 4 mm, preferably less than 3 mm and preferably less than 2 mm.
  • the invention thus makes it possible for the previously pressed plate to be ejected from the mold in an optimized manner.
  • an important parameter is the thickness of the plate.
  • the thickness or strength of the panel can already be specified at the
  • Pressing process measured and transmitted according to the invention by means of a height-adjustable spacer in the ejection direction or the forming device as a distance to an underlying support plate for storing the plate.
  • a constant value even when the machine is running
  • the carrier plate is preferably equipped with a lifting device in a vertical direction and is additionally preferably equipped with spring elements in a vertical direction.
  • the carrier board is pushed away from underneath the product when the product is pushed out. In this way, the product or the plate itself is not under pressure, but also does not fall.
  • the carrier plate moves downwards by a lifting unit, for example until the springs are fully extended, and preferably until an additional gap is formed between the product plate and the ejection unit.
  • a lifting unit for example until the springs are fully extended, and preferably until an additional gap is formed between the product plate and the ejection unit.
  • the spacer preferably acts mechanically on the carrier plate and in particular it presses this carrier plate by a certain amount in the direction of displacement.
  • the panel is pressed inside the mould.
  • the mold described here is therefore in particular a compression mold.
  • the plate is given different thicknesses, i.e. different heights, depending on the amount of material available. This corresponds to a different distance between the top and bottom of the plate when the plate is viewed in plan.
  • the carrier plate should be pressed down to different extents depending on the plate thickness of the product in order to achieve reliable ejection on the one hand and to prevent the plate, i.e. the product plate, from falling on the other.
  • a plate distance already measured or a plate height from the top to the bottom during the pressing process can optionally be used to set a desired value (which is particularly preferably adjustable during production) in a preferably automatic manner or by remote control by a system operator and, if necessary, to operate a height-adjustable spacer with the appropriate control system.
  • a desired value which is particularly preferably adjustable during production
  • This height-adjustable spacer is used to deflect the already mentioned carrier plate downwards or upwards as desired when a stamp is lowered, while the plate, i.e. the product, is pressed out of the mold from top to bottom.
  • the spacer guarantees, based on a set distance, a sufficient distance deflection of a carrier plate that has taken place at the bottom, in order to be able to transport the plate, ie the product lying on the carrier plate, away afterwards.
  • the carrier plate is pushed down or pushed up by the spring elements according to a preset distance of a height-adjustable spacer as far as is necessary to transport the currently present plate with the individual plate thickness onto the carrier plate when it is pressed out of the mold below the mold to be able to
  • the above-mentioned stamping device is particularly preferably arranged on a main carrier, in particular by means of a cantilever.
  • the mold is also stationary in the direction of displacement. This means that the plate can be pushed out of this mold.
  • the displacement direction mentioned is vertical.
  • the mold is preferably a compression mold within which the plate can be pressed.
  • the plate it is possible for the plate to be bordered by this pressing mold in its circumferential direction.
  • the mold can have different geometric shapes such as rectangular shapes, a circular shape, a square shape, or an oval shape.
  • the stamping device presses the panel out of the mold taking into account the thickness of the panel. This means that a stroke or displacement of the stamping device is also determined as a function of the thickness of the panel.
  • the carrier plate is resiliently mounted relative to a carrier.
  • the support plate is prestressed in a certain direction by this springing.
  • the suspension is advantageously designed in such a way that the carrier plate is fed onto the plate, i.e. the product.
  • the carrier plate is pressed down in a certain way before or during the ejection process, or a deflection in the direction of the plate is permitted by means of the spring. It is possible that a multiplicity of springs are provided, which resiliently mount the carrier plate. However, it would also be possible that the support plate is arranged on a boom and this boom is in turn resiliently mounted by a spring. These can be mechanical springs, for example spiral springs.
  • the ejection device can also be a different spring device, such as a pneumatic spring. It is thus possible for the ejection device to have an upper part and a lower part, it being possible for the carrier plate to be mounted as a carrier table in relation to the lower part via a number of intermediate components. As mentioned above, spring devices can be provided, which are arranged to run in a vertical direction, for example.
  • the carrier plate is spring-loaded in a vertical direction and can thereby be pressed downwards from above, in particular with the application of force, against the spring force.
  • the stamping device which as mentioned above is movable in the displacement direction, can cause the plate to be pressed out of its mold with a stamping surface on the underside. After the panel has been pushed out of the mold, it can be removed by means of the carrier plate.
  • the carrier on which the carrier plate is arranged is stationary at least in the direction of displacement.
  • the device has a measuring device for measuring the plate thickness.
  • This measuring device can be located in the area of the ejection device described here, but it can also be upstream, for example in the area of a pressing device which presses or produces the boards.
  • the device can have an input device in order to input a desired panel thickness.
  • the user has the option of entering a specific panel thickness and in particular of adjusting the movement of the spacer to this panel thickness. Such an input can preferably also be made during ongoing operation.
  • the device has a control device which controls a movement of the spacer, taking into account the thickness of the plate controls. In particular, it is possible in this way to set how far the spacer moves the carrier plate in order to ensure that the plate is placed securely on the carrier plate.
  • the carrier plate can also be moved in a direction deviating from the direction of displacement. This is in particular a direction perpendicular to the displacement direction and in particular a horizontal direction. This mobility allows the carrier plate to be removed from the system.
  • the device has a carriage that can be moved in one of the different directions.
  • the carrier plate is preferably arranged on this carriage.
  • the support plate is arranged resiliently on this carriage.
  • the carrier plate is particularly preferably arranged on this carriage so that it can be adjusted in the direction of displacement.
  • the device has a drive device, such as a spindle drive or a pneumatic drive, which causes the movement of the carrier plate with respect to the carriage in the displacement direction.
  • the spacer can be displaced in the direction of displacement relative to the stamping device. In this way, an adjustment to different panel thicknesses is also possible.
  • the device has a drive device for displacing the spacer (in particular with respect to the stamping device). The position of the spacer can be adjusted by this drive device.
  • the device has a drive device for moving the carrier plate in the displacement direction. In this way, it is possible for the carrier plate to be infed onto the mold in which the product plate is located during the ejection process.
  • the present invention is further directed to a method for dispensing disks, the disks being in a form suitable and intended for receiving a disk are made available, and the panel is pressed out of this mold by means of an ejection device, the ejection device ejecting the panel by means of a stamping device which is moved in a predetermined displacement direction, the panel being ejected onto a carrier plate which is used to receive the out the plate ejected from the mould.
  • a spacer of the device displaces the carrier plate in the direction of displacement and displaces it taking into account a thickness of the plate.
  • the spacer can also allow the carrier plate to be displaced in the displacement direction up to a predetermined position. It is therefore also proposed on the procedural side that a spacer is used
  • Displacement of the carrier plate takes place taking into account a thickness of said product plate.
  • the term “plate” designates the product, i.e. the product plate.
  • carrier plate refers to that plate on which the plate, i.e. the product plate, can be placed.
  • the spacer is a rod-like element which presses down the carrier plate or generally moves it in the direction of displacement or, conversely, only allows the carrier plate to move in the direction of displacement up to a certain position.
  • the method described here is preferably characterized by the following method steps:
  • the carrier plate is (initially) delivered under the plate to be ejected, which takes place in particular by moving the carrier plate in a direction perpendicular or at an angle to the direction of displacement.
  • the plate is effected from the mold by a movement of the ejector and in particular a stamping device of the ejector in the direction of displacement.
  • the carrier plate with the plate arranged on it is carried away or transported away transversely to the direction of displacement.
  • this is a direction of movement that runs radially outward with respect to the overall system or with respect to a carrier of the overall system.
  • the carrier plate transports away with at least one component of movement transverse to the direction of displacement.
  • the carrier plate is preferably delivered onto the plate, in particular delivered in the direction of displacement.
  • the carrier plate is displaced under the mold in the direction of displacement, i.e. towards the mold (with the carrier plate held therein).
  • the plate is raised in the direction of the stamping device before the carrier plate is delivered.
  • the stamping device it would also be possible for the stamping device to already be lowered in the direction of the plate. This can be done, for example, by means of a lifting column.
  • the carrier plate is pushed between a support device or a main carrier and the plate.
  • the plate is placed on the carrier plate, which is generally resilient.
  • the stamp is lowered.
  • the carrier plate is preferably also moved at the same time, at least temporarily. This movement of the carrier plate is preferably carried out by the spacer. In a further preferred method, the carrier plate is also moved by the spacer during the squeezing process. At least temporarily during the squeezing process of the plate, the carrier holder is preferably also moved and in particular during a temporal end section of the squeezing process.
  • the carrier plate with the plate lying thereon is preferably at least slightly lowered and particularly preferably then pulled off in the direction perpendicular thereto.
  • the stamping device with the stamp is withdrawn again.
  • the slight lowering is preferably a lowering of less than 10 cm, preferably less than 8 cm, preferably less than 6 cm, preferably less than 4 cm, preferably less than 3 cm, preferably less than 2 cm and particularly preferably less than 1cm.
  • the present invention is further directed to a plate production plant with a device for dispensing plates of the above type.
  • the board production plant also has a pressing device which presses a material within a press mold to form the boards.
  • the panel production plant also has a metering device which meters the material to be formed into the panels into the appropriate molds.
  • the panel production system is designed as a rotary system.
  • the plate production system has a movable, in particular rotatable carrier, and the individual work stations, such as the device for dispensing plates here, are designed to be stationary with respect to this rotary movement of the rotary track carrier.
  • this reference number 101 refers to a dosing device, which doses the material to be supplied into a compression mold.
  • Reference number 102 designates a distribution station, which distributes the material filled into a mold, for example a press mold, by the metering device 1 or causes a uniform distribution of this material.
  • Reference number 103 refers to a free station. This can be occupied to carry out additional, optional work steps, for example to produce special models of plates
  • the reference numeral 104 denotes a rear concrete - filling station. This can, for example, add another or material layer. In this way, multilayer boards can be produced. This station can also be omitted when producing single-layer panels.
  • Reference number 105 indicates a pre-compression device. Using this station, the material filled into the mold is pre-compacted (before the actual pressing process).
  • Reference number 106 shows the pressing station in which the panels to be produced are pressed.
  • Reference number 107 designates an output station or removal station in which the manufactured panels are removed or pressed out of their mold.
  • Numeral 52 designates a rotatable transport carrier. Using this transport carrier, the material is transported from one station to the next station in cycle operation.
  • the individual stations 1 - 7 are arranged in a stationary manner with respect to this rotary movement of the transport carrier.
  • figure 2 shows a dispensing device according to the invention for dispensing plates in a first working position.
  • reference number 12 refers to a mold and in particular a pressing mold, within which an already pressed and manufactured panel 4 is arranged.
  • this plate 4 rests on a carrier or a transport device ..
  • Reference numerals 5 and 9 designate an ejection device which serves to press the finished plate 4 out of the mold 12.
  • the device has a carrier 5 on which a stamping device 9 is arranged. This is of such a size that it can press the plate 4 out of the mold 12 without touching the mold itself.
  • the reference numeral 6 designates the direction of displacement, i.e. the direction in which the stamping device 9 can be advanced onto the plate 4 and later removed again.
  • the stamp device 5.9 is arranged on a boom 2.
  • the reference number 8 designates a spacer device or a spacer. This spacer can also be adjusted in direction 6.
  • Numeral 10 designates a spacing of the spacer.
  • the height-adjustable spacer 8 serves to deflect the already mentioned support plate 7 downwards or upwards as desired when the ram 5 is moved out, while the plate 4 as a product is pressed out of the mold 12 from top to bottom.
  • the reference number 7a designates a support, in particular made of a flexible material, which is optionally arranged on the carrier plate 7.
  • the spacer 8 guarantees due a set distance 10, a sufficiently downward deflection of the carrier plate.
  • Reference number 24 designates a drive device which is suitable and intended for adjusting the position of the spacer in the direction of displacement 6 .
  • the setting of the spacer can depend on different parameters.
  • H designates the constant stroke of the Form 12.
  • the reference T denotes the plate thickness, i.e. the thickness of the manufactured plates. This can be variable during production. However, a measuring device which determines the thickness of the plate T is preferably provided.
  • Reference S denotes the distance between the ejector and the upper surface of the plate 4.
  • the reference ⁇ S (not shown in the figures) indicates the distance in which
  • the plate thickness T is recorded with a measuring device integrated in the pressing device (not shown). These values are transferred to the control of the drive 24 of the output device and the direction of adjustment of the spacer can thus be corrected in such a way that the plate 4 can be prevented from getting caught or crushed.
  • the reference numeral 3 designates a traverse on which a carriage for moving the carrier plate 7 is provided here in the horizontal direction.
  • FIG 3 shows a position in which the carrier plate 7 has already moved under the plate 4.
  • Reference number 26 designates a spring device, such as a pneumatic spring, which enables resilient mounting of the plate device or the carrier plate.
  • the reference number 28 designates a drive unit in order to move the stamping device 5.9 in the vertical direction 6.
  • FIG. The drive device 24 is used to adjust the spacer.
  • FIG 4 shows a detailed representation of the in figure 3 shown situation. It can be seen here that the spacer 8 is arranged next to the carrier plate 12 at the same time. Furthermore, it can be seen that a contact element 42 is arranged on the carrier plate, which contact element can be touched by the spacer in order to move the carrier plate.
  • the reference number 44 designates a stabilization bracket in order to be able to fasten the support plate.
  • the Figures 5a - 5f show six stations of a method according to the invention. At the in Figure 5a In the situation shown, the stamping device 9 is in an upper position, as is the spacer.
  • the plate 4 is arranged inside the mold 12 here.
  • the carrier plate 7 is compared to the laterally offset.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (13)

  1. Dispositif (107) destiné à distribuer des dalles (4) avec un moule (12) qui est approprié et déterminé pour recevoir une dalle (4), et avec un équipement d'éjection (5, 9) pour pousser la dalle (4) hors du moule (12), dans lequel l'équipement d'éjection (5, 9) présente un équipement de marquage pouvant être déplacé dans une direction de déplacement (6) prédéfinie, ainsi qu'une plaque de support (7) qui sert à recevoir la dalle (4) éjectée hors du moule (12),
    dans lequel le dispositif (107) présente un espaceur (8) qui, en tenant compte d'une épaisseur (d) de la dalle (4), déplace la plaque de support dans la direction de déplacement (6) et/ou autorise un déplacement de la plaque de support dans la direction de déplacement (6) uniquement jusqu'à une position prédéfinie, caractérisé en ce que
    le dispositif (107) présente un équipement de mesurage pour mesurer l'épaisseur de dalle et un équipement de commande, lequel commande un mouvement de l'espaceur en tenant compte de l'épaisseur de dalle.
  2. Dispositif (107) selon la revendication 1,
    caractérisé en ce que
    le moule (12) est un moule à presse (12) à l'intérieur duquel la dalle (4) peut être pressée.
  3. Dispositif (107) selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    l'équipement de marquage (5) pousse la dalle (4) hors du moule (12) en tenant compte de l'épaisseur de la dalle.
  4. Dispositif (107) selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    la plaque de support (7) est montée élastiquement par rapport à un support.
  5. Dispositif (107) selon la revendication précédente, caractérisé en ce que
    le support est stationnaire.
  6. Dispositif (107) selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    le dispositif présente un équipement de saisie pour saisir une épaisseur de dalle souhaitée.
  7. Dispositif (107) selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    la plaque de support (7) peut être déplacée dans une direction (H) qui s'écarte de la direction de déplacement.
  8. Dispositif (107) selon la revendication précédente, caractérisé en ce que
    le dispositif présente un chariot pouvant être déplacé dans la direction qui s'écarte.
  9. Dispositif (107) selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    l'espaceur peut être déplacé dans la direction de déplacement (6) par rapport à l'équipement de marquage (5).
  10. Dispositif (107) selon la revendication précédente, caractérisé en ce que
    le dispositif présente un équipement d'entraînement (24) pour déplacer l'espaceur (8).
  11. Dispositif (107) selon au moins l'une des revendications précédentes,
    caractérisé en ce que
    le dispositif présente un équipement d'entraînement pour déplacer la plaque de support (7) dans la direction de déplacement.
  12. Procédé destiné à distribuer des dalles (4), dans lequel les dalles sont mises à disposition dans un moule (12) qui est approprié et déterminé pour recevoir une dalle (4), et la dalle (4) est poussée hors de ce moule au moyen d'un équipement d'éjection (5, 9), dans lequel l'équipement d'éjection (5, 9) éjecte la dalle (4) au moyen d'un équipement de marquage (5) qui est déplacé dans une direction de déplacement (6) prédéfinie, dans lequel la dalle est éjectée jusque sur une plaque de support (7) qui sert à recevoir la dalle éjectée hors du moule (12),
    dans lequel un espaceur (8) du dispositif déplace la plaque de support dans la direction de déplacement (6) en tenant compte d'une épaisseur (d) de la dalle (4) et/ou autorise un déplacement de la plaque de support dans la direction de déplacement (6) uniquement jusqu'à une position prédéfinie, caractérisé en ce que
    le dispositif (107) présente un équipement de mesurage pour mesurer l'épaisseur de dalle et un équipement de commande, lequel commande un mouvement de l'espaceur en tenant compte de l'épaisseur de dalle.
  13. Procédé selon la revendication 12, caractérisé par les étapes de procédé suivantes
    - placer la plaque de support sous la dalle (4) à éjecter
    - presser la dalle (4) hors du moule (12) par un mouvement de l'équipement d'éjection (5, 9) dans la direction de déplacement
    - éloigner la plaque de support (7) avec la dalle (4) agencée sur celle-ci, transversalement à la direction de déplacement.
EP20163712.1A 2019-03-29 2020-03-17 Installation de fabrication de plaques pourvue de dispositif de refoulement Active EP3718720B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019108313 2019-03-29

Publications (2)

Publication Number Publication Date
EP3718720A1 EP3718720A1 (fr) 2020-10-07
EP3718720B1 true EP3718720B1 (fr) 2022-02-09

Family

ID=70285385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20163712.1A Active EP3718720B1 (fr) 2019-03-29 2020-03-17 Installation de fabrication de plaques pourvue de dispositif de refoulement

Country Status (2)

Country Link
EP (1) EP3718720B1 (fr)
PL (1) PL3718720T3 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047101B (de) * 1955-03-28 1958-12-18 Giuliano Giannelli Kachelpresse
ES382459A1 (es) * 1969-07-24 1972-11-16 Giannelli Instalacion para el desmoldeo automatico de baldosas de la prensa.
US4158533A (en) * 1975-06-27 1979-06-19 Longinotti S.P.A. Apparatus for producing and stripping pressed cement tiles with superimposition of a plurality of stripped tiles

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EP3718720A1 (fr) 2020-10-07
PL3718720T3 (pl) 2022-08-22

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