EP0610529A1 - Procédé et dispositif pour la fabrication aux dimensions précises d'éléments en forme de panneau - Google Patents

Procédé et dispositif pour la fabrication aux dimensions précises d'éléments en forme de panneau Download PDF

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Publication number
EP0610529A1
EP0610529A1 EP93102032A EP93102032A EP0610529A1 EP 0610529 A1 EP0610529 A1 EP 0610529A1 EP 93102032 A EP93102032 A EP 93102032A EP 93102032 A EP93102032 A EP 93102032A EP 0610529 A1 EP0610529 A1 EP 0610529A1
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EP
European Patent Office
Prior art keywords
core
ejection
mold
chamber
molding
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.)
Granted
Application number
EP93102032A
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German (de)
English (en)
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EP0610529B1 (fr
Inventor
Heinz Falk
Dieter Fechner
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Individual
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Individual
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Publication date
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Priority to AT93102032T priority Critical patent/ATE145581T1/de
Priority to DE59304614T priority patent/DE59304614D1/de
Priority to EP93102032A priority patent/EP0610529B1/fr
Publication of EP0610529A1 publication Critical patent/EP0610529A1/fr
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Publication of EP0610529B1 publication Critical patent/EP0610529B1/fr
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    • 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
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/44—Producing shaped prefabricated articles from the material by forcing cores into filled moulds for forming hollow articles
    • 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
    • B28B7/10—Moulds with means incorporated therein, or carried thereby, for ejecting or detaching the moulded article
    • 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
    • B28B7/24—Unitary mould structures with a plurality of moulding spaces, e.g. moulds divided into multiple moulding spaces by integratable partitions, mould part structures providing a number of moulding spaces in mutual co-operation
    • B28B7/241—Detachable assemblies of mould parts providing only in mutual co-operation a number of complete moulding spaces
    • B28B7/243—Detachable assemblies of mould parts providing only in mutual co-operation a number of complete moulding spaces for making plates, panels or similar sheet- or disc-shaped objects

Definitions

  • the invention relates to a process for the production of precisely dimensionally stable plate-shaped elements from a setting material which can be cast during processing, in particular gypsum, in which the material is poured in the form of a slurry into at least one molding chamber and then closed in a shape-retaining manner and the casting slurry in the molding chamber at least as long is allowed to set until the elements formed therefrom are dimensionally stable, whereupon the elements are ejected from the molding chamber which is then open on one side and fed to a further treatment.
  • the invention relates to a device for carrying out this method with an open-top molding box containing at least one molding chamber delimited by pairs of parallel walls, which is closed at the bottom by strip-shaped closing means which are displaceably mounted in the molding chamber and connected to an ejection device which are movable between a lowered end position and a raised ejection position.
  • partition walls made of gypsum according to DIN 18 163 are prefabricated gypsum building elements for the construction of light partition walls. They typically have a format of 500 x 666 mm with a thickness of 40 to 100 mm and are provided with precisely fitting grooves and tongues all around, so that the panels can be moved or assembled using the adhesive process.
  • the plates are cast in rigid mold boxes, the mold chambers of which are formed by walls with a corresponding surface quality (mirror hard chrome plating). After the gypsum slurry has set, the panels are ejected from the molding chambers.
  • gypsum is dimensionally stable, the components manufactured in this way have an accuracy that is given by the accuracy of the molding chambers. It is ⁇ 0.02 to 0.05 mm in all dimensions, with an absolutely flat and smooth surface.
  • the partition wall panels automatically result in a straight wall during installation, due to which the smooth surface means that plastering is no longer necessary, which means that painting or wallpapering work can be started immediately after moving the partition wall panels.
  • plate-shaped components for example plaster ceiling tiles
  • plaster ceiling tiles are also common, which are distinguished by a much smaller thickness compared to their dimensions.
  • Such ceiling tiles are used as so-called suspended ceiling elements, whereby they are used not only for ceiling cladding or ventilation ceilings because of their very good optical, sound and heat-insulating properties and their aesthetically pleasing exterior, but whenever the important thing is the representative character of a room to underline.
  • the dimensions of such decorative plaster ceiling tiles are typically 500 x 500 mm or 600 x 600 mm or 1000 x 500 mm with thicknesses of 15 to 40 mm. They are all provided with all-round grooves and tongues.
  • the swelling forces that occur are balanced within the molding box; however, they must be absorbed by the outer bulkhead plates (end plates). Despite the surfaces of all mold chamber parts being polished to a mirror finish, the swelling forces that occur when the gypsum sets, result in very large frictional forces that have to be overcome when the set gypsum boards are ejected from the mold chamber. These frictional forces obviously occur primarily on the surfaces and less on the tongue and groove profile sides.
  • ejection forces in the order of 120 to 150 kN can be necessary if the plaster slurry is allowed to set completely in the molding chamber.
  • the boards are as early as possible, i.e. ejected in a relatively soft condition.
  • the plates then have a hardness of approx. 10 to 15 Shore C, which, in comparison, corresponds to the hardness of butter in the cooled state. But even in this relatively soft condition, 20 to 39 kN of ejection force is still required for a single 500 x 666 mm plate.
  • Building boards of large format and small thickness are also usually reinforced by fibers (e.g. glass fibers), which means that the pouring paste is much more viscous than normal gypsum paste at the time the mold box is filled because of this fiber admixture. This favors the appearance of voids in the thin plates.
  • fibers e.g. glass fibers
  • the object of the invention is therefore to remedy this situation and to point out a way which, in comparison with its small thickness, makes it possible to produce large-format plate-shaped elements made of castable material, in particular gypsum, in a simple and reliable manner in the ejection process with high precision.
  • the procedure according to the invention is such that the molding chamber is subdivided into partial mold chambers by at least one movable core which acts in the manner of a partition and that the elements formed in the partial mold chambers after setting together with the core adjacent to them ejected from the molding chamber and then separated from the core before they are sent for further treatment.
  • the movable cores with the thin plate-shaped elements which are in contact with them on the broad side are ejected at the same time, the frictional forces acting on the plate-shaped elements during ejection are reduced by approximately 50%.
  • the adhesion between the elements and the respectively assigned core during ejection brings about a relief of the end face of the still soft elements receiving the ejection forces, while at the same time the movable strip-shaped closure elements of the molding chamber which transmit the ejection forces are also relieved accordingly. This ensures that the shaped plate-shaped elements do not suffer any deformation when ejected, despite their relatively small thickness.
  • each movable core when the respective molding chamber is filled, each movable core is in a retracted filling position which at least partially leaves the molding chamber open; after pouring a corresponding amount of casting slurry into the molding chamber, it is moved into an operating position that divides the partial molding chambers, in which it remains held until the casting slurry has set.
  • the core In this filling position, the core is generally held essentially on the face side with adjacent closure means of the molding chamber, it being possible for the plate-shaped elements to be produced from the casting slurry to be given a corresponding face profile by appropriate profiling of these closure means.
  • the closing means of the molding chamber which are adjacent to it are moved back in the opposite direction into an end position in which they remain until they set of the pouring porridge and from which they are then moved together with the core into the ejection position while ejecting the elements.
  • the mold chamber still has its normal large cross section due to the retracted moving cores, which is dimensioned so that with the available depth and chamber width only slight turbulence occurs in the pouring slurry that does not contain air or Have voids in the plate-shaped elements to be produced and not even when the pouring slurry is viscous, for example because it contains fillers, for example glass fibers, etc.
  • the plate-shaped elements formed After the plate-shaped elements formed have set, they are ejected together with the respectively assigned core. It is advantageous if, after reaching the ejection position, the core is moved back relative to the closing means of the molding chamber by a predetermined amount before the elements are separated from the core. In this way it is achieved that the plate-shaped elements are released at one point from the core, so that they can be gripped gently at this point with appropriate gripping means.
  • the explained moving back of the core relative to the plate-shaped elements lying against it is a Drawing process in which the elements adhere to the core even further. The remaining adhesive force is sufficient to prevent the plate-shaped elements from falling over and thus no longer being securely gripped by the gripping means.
  • the cores are withdrawn entirely, so that the elements can then be handled freely hanging from the gripping means.
  • the closing means of the molding chamber and the cores are then moved back into the filling position or the starting position, whereupon the next loading cycle of the molding chamber takes place with casting slurry.
  • a molding box is usually used in practice, which contains a plurality of molding chambers divided by stationary parallel partition walls, each of which contains at least one movable core, the cores of all molding chambers being moved together.
  • a molding box is used to carry out the method, which has only a single molding chamber, which may contain only one movable core.
  • a device set up to carry out the new method with the features mentioned at the outset is characterized in accordance with the invention in that at least one plate-like or disk-shaped movable core which acts in the manner of a partition and is oriented parallel to two side walls of the molding chamber is arranged in the molding chamber and through which the mold chamber can be subdivided into partial mold chambers, which are closed on the bottom side by the closing means arranged on both sides of the core, that the core with an adjusting device is coupled, by means of which it can be moved between a retracted filling position at least partially leaving the mold chambers, an operating position dividing the partial mold chambers and an advanced ejection position, and that the actuating device of the core is synchronized with the ejection device in such a way that the core during the ejection movement of the bottom closure means the molding chamber can be moved into its ejection position together with these.
  • the bottom-side closure means can be lowered into the end position by the ejection device, starting from the filling position, while the core can be advanced into the operating position by the adjusting device. In this way, particularly good mixing and thus deaeration of the quantity of casting slurry filled into the molding chamber is achieved.
  • the device shown in FIGS. 1 to 3 has a machine base 1 with a horizontal frame 2 welded together from profiled beams, which is supported on the ground by feet indicated at 3 in FIG. 3. On the frame 2 four columns 4 are arranged, which carry two parallel horizontal supports 5, on which a rectangular shaped box 6 is attached, which is supported laterally at 7.
  • the molding box 6 has 2 flat side walls 8 aligned parallel to the supports 5 and two also flat end walls 9 running at right angles thereto (FIGS. 1, 3), which are screwed together. Its interior is divided by parallel to the end walls 9, such as these vertically aligned planar partition walls 10, into adjacent mold chambers 11, of which 24 are provided in the illustrated embodiment.
  • the two side walls 8 are provided with parallel strip-like webs or likewise parallel groove-like depressions, through which a tongue profile 12 is formed on one side and a groove profile 13 (FIG. 3) is formed on the other side.
  • Each of the mold chambers 11, which are rectangular in cross section, can be divided by a plate-shaped or disc-shaped thin core 14 (compare in particular FIGS. 4, 5) into two partial mold chambers 15 (FIG. 2), which have the same width and each for forming a thin plasterboard serve, which is delimited on one side by a core 14 and on the other side by a partition 10 or by one of the two end walls 9.
  • Each of the essentially rectangular cores 14 is formed by a sheet metal, which is laterally sealed and adjoins the side walls 8 and is movably guided thereon.
  • a core 14 is provided, which is aligned parallel to the partition walls 10 and sealed on the bottom of the respective molding chamber 11 between two closing means forming bottom strips 16 and is displaceably guided, which in turn can be seen in FIG. 5 with a attached centrally arranged bar 17 are formed, through which a groove is formed on the bottom narrow side of the plasterboard produced in the respective partial mold chamber 15 becomes.
  • the strip 17 is aligned with the tongue and groove profile 12, 13 on the side walls 8 of the respective partial mold chamber 15, in such a way that the gypsum board produced has an all-round tongue and groove profile.
  • a fork piece 18 FIGS. 3, 4
  • a tie rod 19 which is attached at the other end to a horizontal cross member 20 common to all tie rods 19 (FIG. 1). .
  • an adjusting device which has two vertically aligned lifting cylinders 21 designed as telescopic cylinders, the piston rods 22 of which are articulated to the crossbeam 20 at 23.
  • the bottom strips 16, which extend on both sides of the core 14 in each molding chamber and which close the bottom of the molding chamber together with the core 14, are each rigidly connected via a two-part strip-like ejector 24 to a horizontal base plate 25 common to all the bottom strips 16, which is above the frame 2 is arranged adjustable in height.
  • the base plate 25 carries two mutually spaced parallel downward hanging belts 26, so that there is an overall formation of a U-shaped cross-sectional shape.
  • the base plate 25 is formed with through bores 27 lying in a row (FIG. 3), each of which receives a tie rod 19 which is guided in the bore 27 so as to be vertically displaceable.
  • the cross member 20 with the cores 14 is therefore adjusted in height relative to the base plate 25 and the base strips 16 connected to it.
  • the piston rods 30 of two hydraulic or pneumatic ejection cylinders 31 are connected, which form parts of an ejection device and are received in corresponding bores 33 of the frame 2, to which they are rigidly attached.
  • the ejection cylinders 31 make it possible to move the base plate 25 and thus the base strips 16 up and down in the vertical direction, as is indicated in FIG. 1, 2 by dashed arrows 34.
  • solid arrows 35 are entered in FIGS. 1, 2.
  • All walls 8, 9, 10, 16 delimiting the molding chambers 11, like the cores 14, are hard chrome-plated and highly polished on their side facing the respective partial molding chamber 15. These parts are made of a special stainless steel.
  • the upward opening of the vertically aligned mold chambers 10, delimited by flat vertical walls, can be closed by a closure device after filling the gypsum paste, which, for the sake of clarity, has been omitted in FIGS. 1, 2 and only in FIGS. 3, 4 is indicated.
  • This closure device has two guide rods 36 which are arranged on the molding box 6 in the vicinity of its opening edge and are fastened to the two end walls 9 via bearing blocks 37.
  • two parallel, so-called mask bars 38 which are connected to one another at a fixed distance, are slidably guided, to which a slide-like closure member for opening the molding box 6 is fastened, which is also referred to as a "mask” and consists of a number of sealed, parallel, parallel Mask profile strips 39 (FIG. 4), each of which has two groove-like depressions 40.
  • the groove-like depressions 40 each serve to form a spring on the facing upper side of the plasterboard produced in the respective partial mold chamber 15.
  • the closure member is sealed against the partitions 9 and the partitions 10 and against the side walls 8 in the region of the opening edge of the molding box.
  • two hydraulic cylinders 41 are connected, the piston rods of which are formed by the guide rods 36 and which make it possible to move the closure member from the off-center rest position shown in FIG. 3 to a front position in which the opening of the molding box 6 is completely closed , as indicated in Fig. 4.
  • FIGS. 6 to 10 illustrating the individual process steps:
  • the cores 14 and the sealing strips 16 are first brought into the filling position shown in FIG. 6 by appropriate actuation of the lifting cylinders 21 and the ejection cylinders 31. In this filling position they are Cores 14 with their narrow end faces facing the respective molding chamber 10 are traversed to a depth of approximately 676 mm with respect to the opening edge of the molding box 6. This depth dimension is designated by 42 in FIG. 6. The width 43 of the mold chamber opening is 74 mm.
  • the base strips 16 are at the same height as the narrow end faces of the cores 14 with which they are aligned.
  • the bottom rails 16 are moved into a lower end position, in which they are at a distance of 1,000 mm from the mold box edge, as this is indicated in Fig. 7 at 42a.
  • the movable cores 14 are extended in the opposite direction from the filling position into their operating position, in which they assume their normal altitude, in which they align with their upper end face with the edges of the molding box 6.
  • the gypsum pulp filling 44 of the mold chambers 11 was additionally mixed and vented, while at the same time each mold chamber 11 was divided into two mold chambers 15 filled with gypsum pulp, of which in each a thin plasterboard is created.
  • the casting slurry in the molding box 6 stands on the filling level at the opening edge of the molding box. It is now by appropriate actuation of the hydraulic cylinder 41 (FIG. 3), the closure member consisting of the mask profile strips 39 (FIG. 4) advanced with respect to FIG. 3 to the right.
  • the opening of the molding box 6 is closed, the gypsum paste contained in the partial mold chambers 15 filling the groove-like depressions 40 of the mask profile strips 39, so that springs are molded onto the gypsum boards which form when the gypsum paste forms.
  • the closure member consisting of the mask profile strips 39 is moved back into the off-center rest position according to FIG. 3, in the mold box 6 is open. During this movement back of the closure member, the mask profile strips 39 at the same time bring about a reforming of the still soft gypsum boards on the top side facing them. This "drawing process" together with the previous casting process ensures that the shape and surface of the springs or shoulders present on the facing top of the plasterboard are absolutely smooth and complete.
  • the two ejection cylinders 31 (FIGS. 1, 2) take effect, which extend the base plate 25 and thus the base strips 16 together into the upper ejection position.
  • the movable cores 14 are inevitably carried synchronously because the lifting cylinders 21 and the cross member 20 join in the movement of the base plate 25.
  • the gypsum boards 50 and the cores 14 and the base strips 16 assume the position shown in FIG. 8, in which the gypsum boards 50 are completely pushed out of the molding box.
  • the gypsum boards 50 are held securely on the cores 14 assigned to them by the existing adhesion, so that they cannot tip over.
  • the cores 14 are lowered in the direction of arrow 35 into the position according to FIG. 9 by approximately 300 mm, while the base strips 16 are in their ejection position 8 remain.
  • the lowering of the cores 14 takes place by appropriately loading the lifting cylinders 21 (FIG. 2); the ejection cylinders 31 meanwhile hold the bottom strips 16 in the position according to FIG. 8.
  • the gypsum boards 50 are gripped by means of a pneumatically operated gripper 51, which from above has intermediate plates 52, the thickness of which corresponds approximately to the thickness of the cores 14, into the gaps between the plasterboards 50 released by the cores 14.
  • a pneumatically operated gripper 51 which from above has intermediate plates 52, the thickness of which corresponds approximately to the thickness of the cores 14, into the gaps between the plasterboards 50 released by the cores 14.
  • laterally arranged pressure jaws 53 engaging on the plasterboard 50 on the broad side are pressed inwards, so that the gypsum plates 50 are gently clamped on the broad side between the intermediate plates 52 and the pressure plates 53.
  • the basic structure of the gripper 51 is known; it is described in EP 0 161 374 B1.
  • the cores 14 are pulled downwards out of the plate pack held by the gripper 51 by corresponding actuation of the lifting cylinders 21 (FIG. 2).
  • the gypsum boards 50 now hang freely on the gripper 51 and can be fed for further treatment.
  • the cores 14 have been moved completely back into the molding chamber 6 in the direction of the arrow 34, while the base strips 16 have been held in their position according to FIGS. 8, 9. The cores 14 thus do not hinder the removal of the gypsum boards 50.
  • the cores 14 and the bottom rails 16 are then brought back into the filling position according to FIG. 3 by corresponding actuation of the lifting cylinders 21 and the ejection cylinders 31, with which the next loading cycle can follow.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
EP93102032A 1993-02-10 1993-02-10 Procédé et dispositif pour la fabrication aux dimensions précises d'éléments en forme de panneau Expired - Lifetime EP0610529B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT93102032T ATE145581T1 (de) 1993-02-10 1993-02-10 Verfahren und vorrichtung zur herstellung von genau masshaltigen plattenförmigen elementen
DE59304614T DE59304614D1 (de) 1993-02-10 1993-02-10 Verfahren und Vorrichtung zur Herstellung von genau masshaltigen plattenförmigen Elementen
EP93102032A EP0610529B1 (fr) 1993-02-10 1993-02-10 Procédé et dispositif pour la fabrication aux dimensions précises d'éléments en forme de panneau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93102032A EP0610529B1 (fr) 1993-02-10 1993-02-10 Procédé et dispositif pour la fabrication aux dimensions précises d'éléments en forme de panneau

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EP0610529A1 true EP0610529A1 (fr) 1994-08-17
EP0610529B1 EP0610529B1 (fr) 1996-11-27

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AT (1) ATE145581T1 (fr)
DE (1) DE59304614D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750916A1 (fr) * 1996-07-09 1998-01-16 Sarl Alpha Platre Dispositif de moulage pour plaques de platre de faible epaisseur
EP0922548A1 (fr) * 1997-12-03 1999-06-16 S.A.R.L. Alpha Platre Procédé de moulage de plaques fines de matériau coulable, notamment de plâtre, dispositif pour sa mise en oeuvre et produit obtenu
ES2152788A1 (es) * 1997-10-13 2001-02-01 Perez Jose Antonio Garcia Procedimiento y maquina para la produccion de baldas prefabricadas de escayola.
US20100225023A1 (en) * 2007-07-23 2010-09-09 S.A.C.M.E. Spa Machine and method to produce structural elements for the building trade made of cement material, having one or more polymer material inserts
DE102015010522A1 (de) * 2015-08-13 2017-02-16 Grenzebach Bsh Gmbh Vorrichtung und Verfahren zur Herstellung von massiven und hohlen Gipswandbauelementen im schnellen Wechsel
CN111257203A (zh) * 2020-04-13 2020-06-09 安徽理工大学 考虑注浆加固有效重叠交圈的模拟试验装置及试验方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE391725C (de) * 1914-05-14 1924-03-08 Eberling Cement Machinery Comp Maschine zum Formen von Gegenstaenden aus Beton und aehnlichen plastischen Massen
FR798094A (fr) * 1935-11-22 1936-05-08 Basaltes Francais Dispositif pour la fabrication de dalles ou autres objets en agglomérés
GB535380A (en) * 1939-01-23 1941-04-08 William Porter Witherow Improvements in or relating to method of and apparatus for making molded articles
FR2513562A1 (fr) * 1981-09-29 1983-04-01 Logistique Manutention Stockag Moule multiple pour la fabrication de pieces en platre
DE3226395A1 (de) * 1982-07-15 1984-01-19 Veit Dennert KG Baustoffbetriebe, 8602 Schlüsselfeld Verfahren zum herstellen von baustein-rohlingen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE391725C (de) * 1914-05-14 1924-03-08 Eberling Cement Machinery Comp Maschine zum Formen von Gegenstaenden aus Beton und aehnlichen plastischen Massen
FR798094A (fr) * 1935-11-22 1936-05-08 Basaltes Francais Dispositif pour la fabrication de dalles ou autres objets en agglomérés
GB535380A (en) * 1939-01-23 1941-04-08 William Porter Witherow Improvements in or relating to method of and apparatus for making molded articles
FR2513562A1 (fr) * 1981-09-29 1983-04-01 Logistique Manutention Stockag Moule multiple pour la fabrication de pieces en platre
DE3226395A1 (de) * 1982-07-15 1984-01-19 Veit Dennert KG Baustoffbetriebe, 8602 Schlüsselfeld Verfahren zum herstellen von baustein-rohlingen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750916A1 (fr) * 1996-07-09 1998-01-16 Sarl Alpha Platre Dispositif de moulage pour plaques de platre de faible epaisseur
ES2152788A1 (es) * 1997-10-13 2001-02-01 Perez Jose Antonio Garcia Procedimiento y maquina para la produccion de baldas prefabricadas de escayola.
EP0922548A1 (fr) * 1997-12-03 1999-06-16 S.A.R.L. Alpha Platre Procédé de moulage de plaques fines de matériau coulable, notamment de plâtre, dispositif pour sa mise en oeuvre et produit obtenu
US20100225023A1 (en) * 2007-07-23 2010-09-09 S.A.C.M.E. Spa Machine and method to produce structural elements for the building trade made of cement material, having one or more polymer material inserts
US8801422B2 (en) * 2007-07-23 2014-08-12 S.A.C.M.E. Srl Machine and method to produce structural elements for the building trade made of cement material, having one or more polymer material inserts
DE102015010522A1 (de) * 2015-08-13 2017-02-16 Grenzebach Bsh Gmbh Vorrichtung und Verfahren zur Herstellung von massiven und hohlen Gipswandbauelementen im schnellen Wechsel
CN111257203A (zh) * 2020-04-13 2020-06-09 安徽理工大学 考虑注浆加固有效重叠交圈的模拟试验装置及试验方法
CN111257203B (zh) * 2020-04-13 2022-06-14 安徽理工大学 考虑注浆加固有效重叠交圈的模拟试验装置及试验方法

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Publication number Publication date
DE59304614D1 (de) 1997-01-09
EP0610529B1 (fr) 1996-11-27
ATE145581T1 (de) 1996-12-15

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