EP0153588B2 - Procédé de fabrication de pièces moulées, notamment de panneaux, à partir d'un mélange de plâtre et de matériau fibreux ainsi que dispositif pour la mise en oeuvre du procédé - Google Patents

Procédé de fabrication de pièces moulées, notamment de panneaux, à partir d'un mélange de plâtre et de matériau fibreux ainsi que dispositif pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0153588B2
EP0153588B2 EP85100748A EP85100748A EP0153588B2 EP 0153588 B2 EP0153588 B2 EP 0153588B2 EP 85100748 A EP85100748 A EP 85100748A EP 85100748 A EP85100748 A EP 85100748A EP 0153588 B2 EP0153588 B2 EP 0153588B2
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EP
European Patent Office
Prior art keywords
water
plaster
mixture
mixer
fibrous material
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.)
Expired - Lifetime
Application number
EP85100748A
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German (de)
English (en)
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EP0153588B1 (fr
EP0153588A1 (fr
Inventor
Klaus Dieter Dr. Wilke
Karl Heinz Dipl.-Ing. Westerhausen
Jörg Dipl.-Phys. Bold
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Grenzebach GmbH and Co KG
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Babcock BSH AG
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Priority claimed from DE19843404658 external-priority patent/DE3404658A1/de
Priority claimed from DE19843439493 external-priority patent/DE3439493A1/de
Application filed by Babcock BSH AG filed Critical Babcock BSH AG
Priority to AT85100748T priority Critical patent/ATE48105T1/de
Publication of EP0153588A1 publication Critical patent/EP0153588A1/fr
Publication of EP0153588B1 publication Critical patent/EP0153588B1/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
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/526—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement by delivering the materials on a conveyor of the endless-belt type
    • 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
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/521—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement from dry mixtures to which a setting agent is applied after forming
    • 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
    • B28B1/52—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement
    • B28B1/522—Producing shaped prefabricated articles from the material specially adapted for producing articles from mixtures containing fibres, e.g. asbestos cement for producing multi-layered articles

Definitions

  • the invention relates to a process for the continuous production of moldings, such as boards made of gypsum and fibrous material, in accordance with the features of the preamble of claim 1, and to an apparatus for carrying out the process according to the features of the preamble of claim 10.
  • the invention has for its object to provide a process for the continuous production of moldings, in particular plates, from gypsum and fibrous material, in which the surfaces of the plates are essentially free of smallpox and in which furthermore optimal strength values of little statistical variation Series production can be achieved. Furthermore, an apparatus for performing the method according to the invention is to be specified.
  • the object is achieved in a method with the features of the preamble of claim 1 by the characterizing features of this claim.
  • the method according to the invention it is possible to produce very good strength values with less scatter in the continuous manufacturing process.
  • the plates produced by the method according to the invention have surfaces of high quality which are free from smallpox and therefore do not have to be ground.
  • the method according to the invention also makes it possible to regulate and measure the addition of water to the metered gypsum-fiber mixture in such a way that the moistened gypsum-fiber mass does not granulate or clump.
  • the limit value depends on the pre-selected mixing ratio and the type of raw materials.
  • the division of the gypsum pulp mass into separate partial streams also has the advantage that the water added is distributed evenly and finely throughout the mass.
  • sheets with good constant flexural and transverse tensile strengths can be mass-produced, which have a high-quality surface that is free of small pox.
  • the exact dosage of the constituents of the gypsum fibreboard, including the precisely metered addition of as little moisture as possible, also ensures that the time for the drying of the finished pressed panels can be kept optimally short, which also reduces the energy expenditure required.
  • the gypsum fiber material undergoes relatively large volume changes, which can have an effect of up to 0.3% linear change in length (3 mm / m). This is particularly disadvantageous when using gypsum fibreboards, where precise dimensioning or tolerances when laying or installing such panels is important. If seamlessly laid panels with a residual moisture of up to 3% are then laid and then dry up to 0% residual moisture, these can tear open when subsequently compensated for the ambient moisture.
  • the invention thus creates a process in which molded articles, in particular sheets, made from a mixture of gypsum and fibrous material with an optimally short setting and drying time receive a consistently high strength with little scatter.
  • each partial mass flow is sprinkled into a layer of the shaped body on the base or the previous layer.
  • Each layer - regardless of the other layers - is moistened with a given amount of water.
  • the supply of total water (including the amount of water for moistening the dry gypsum-fiber mixture) is controlled in such a way that a quantity of water is added to the shaped body that is up to 25% greater than the stoichiometric amount of water that is calculated to set the gypsum-fiber mixture is required.
  • the superstoichiometric addition of water is preferably in the order of magnitude between 15% and 20% (cf. FIG. 4). Since the additional amount of water is distributed in layers, there is no need for remixing and the associated disadvantageous lumping or granulation of the gypsum.
  • the over-stoichiometric addition of water increases the plasticity of the plaster when pressed.
  • the plasticity also allows the use of a somewhat coarser grinding plaster, which results in economic advantages.
  • the adhesive force of the wet gypsum also compensates for the restoring forces of the cellulose fibers deformed during pressing. As a result, the press can be opened immediately after briefly pressing, without it being necessary to adapt the pressing time to the setting process. Due to the higher plasticity, the surface of the molded body adapts exactly to the press base, whereby a smooth press base is formed as a smooth surface.
  • the partial mass flows have different mass volumes, layers of different thicknesses can be formed. In order to achieve a central core layer and a large number of scattered layers, the number of partial mass flows is odd. Additives can be added to each partial mass flow; In particular, additives are added to the partial mass flow of the core layer, which is preferably larger in volume.
  • the supply of the individual amounts of water is controlled, which is preferably 15% to 20% above the stoichiometric amount of water in the total amount.
  • the amount of water added to the individual layers after spreading can vary; in particular, a larger amount of water is added to the outer layers of the shaped body than to the inner layers.
  • the amounts of water sprayed on the individual layers can also contain additives; it is expedient to add suspensions or emulsions of pigments and / or synthetic resins to the amount of water in the outer layer of the molding. This can, for. B. a surface decoration, a water-repellent impregnation or a fire retardant can be used directly in the production without a second process step being necessary.
  • the method according to the invention has an advantageous effect here, since it can be used to produce plates with finished surfaces that do not have to be reground.
  • An originally unaccelerated or slightly decelerated basic mixture can also be accelerated shortly before the press by adding accelerator solution (e.g. potassium sulfate).
  • a quantity of fibers is drawn from a fiber bunker 1 by means of motor-driven conveyor belts 20a, 20b and 20c.
  • the conveyor belt 20c is preferably driven by a motor 34.
  • the amount of fiber discharged is pre-metered volumetrically by means of leveling rollers 21 or the like.
  • the leveling rollers 21 are arranged at the end of the last conveyor belt 20c near the exit 22 of the fiber bunker 1.
  • a continuously operating weighing device 2 for example a belt weigher, is arranged below the outlet 22, for example it weighs the amount of fiber emerging from the fiber bunker 1 and conveys it to a dry mixer 4 via a chute or the like.
  • the output signal of the preferably electronic weighing device 2 which corresponds to the detected weight of the fiber quantity, is fed to an electronic control device 23 which, depending on this output signal, regulates the speed of the drive motor 13a of a screw conveyor 13 of a metering scale 14 assigned to the gypsum metering device 3 via a control line 31.
  • the control device 23 further regulates at least the conveying speed of the last conveyor belt 20c of the fiber bunker 1 in accordance with a difference value which is formed from the output signal of the belt scale 2 and a setpoint value predetermined by the control device 23. Furthermore, the control device 23 also monitors the predetermined quantity ratio of gypsum / fiber and acts via the control lines 30 and 31 accordingly on the conveying speed of the conveyor belt 20c and the screw conveyor 13 of the metering device 3.
  • the dry mixer 4 is preferably a horizontal continuous mixer with a rotating mixer shaft and mixing tools arranged radially thereon, in which the material to be mixed passes through the mixer largely without backflow.
  • This mixer 4 is continuously added at one end with the weight-metered starting quantities of gypsum and fibrous material.
  • the dry mixture of gypsum and fibers emerging from its outlet 4a is conveyed preferably via a conveyor belt 5 with variable speed drive into an intermediate bunker 45 of the gypsum fiber metering device 6.
  • the mixture is drawn off from this intermediate bunker 6a as required via conveyor belts 16a, 16b arranged in the intermediate bunker.
  • leveling rollers 15 are arranged in the vicinity of the bunker outlet 17, by means of which the amount of the dry mixture consisting of gypsum and fibers to be discharged is volumetrically pre-metered.
  • the dry mixture falls directly on a weighing device arranged under the outlet 17, which preferably consists of a belt scale 7.
  • the output signal of the belt scale 7 is fed to an electronic control device 18 which controls the conveying speed of the last conveyor belt 16b on the one hand via the control line 32 and a water metering device 8 on the other hand via the control line 33.
  • This is controlled in such a way that such an amount of water is always supplied which is below a limit value above which the moistened gypsum-fiber mixture tends to form granules or lumps.
  • the controlled metering of the water in a wet mixer 9 can be carried out according to the invention in such a way that the control signal is effective with a delay of the amount of time that the detected mass of gypsum-fiber mixture needs to reach the point (nozzle 8 ') of the water addition.
  • the dry gypsum-fiber mixture determined by the weight of the belt weigher 7 is fed directly to the moist mixer 9, which is preferably also designed as a continuous mixer with a rotating mixer shaft and mixing tools arranged thereon.
  • the moist mixer 9 Via the water metering device 8 controlled by the control device 18, the precisely metered amount of water is fed to the mixed flow of the wet mixer 9 via nozzles 8 ′ (not shown in more detail).
  • the nozzles 8 'spray the water preferably transversely to the longitudinal axis of the mixed stream passing through the mixer into the cylindrical interior of the mixer 9.
  • the gypsum-fiber mixture moistened with water falls into an apportioning device 37 which divides the mass flow into three mass flows, preferably by rhythmic deflection (clocked deflection), on conveyor belts 10a, 10b and 10c which can be driven at variable speed.
  • Each conveyor belt 10a to 10c feeds an intermediate bunker of a spreading machine 11a to 11c known per se.
  • the spreading machines 11a to 11c are constructed identically and have a conveyor belt 36, at least one leveling roller 27 and a discharge roller 28.
  • a molding line 12 runs under the spreading head 26a to 26c of each spreading machine 11a to 11c, the spreading heads 26a to 26c being arranged one behind the other in the conveying direction 19 of the molding line 12.
  • a spray nozzle 40 for adding water is provided in front of the first spreading head 26a.
  • a spray nozzle 41 and 42 is arranged between the spreading heads 26a and 26b and 26b and 26c; behind the last spreading head 26c, water is also supplied via a spray nozzle 43. This arrangement ensures that the spray nozzles 40 to 43 do not become dirty and cannot become clogged, since these nozzles lie outside the dust swirling zone between adjacent spreading heads.
  • the continuous weight-metered addition of the dry mixture to the mixer 9 and the moistening by means of a controllable amount of water as a function of the electrical output signal of the weighing device 7 have made it possible to continuously produce gypsum fiberboard without a large scatter in the strength values.
  • the top of the molding line is wetted with water before the application of a first layer 35a of the molded body to be produced on the molding line 12 by means of the nozzle 40.
  • the first partial mass flow of the gypsum-fiber mixture moistened in the manner described above is sprinkled onto the thus moistened molding line 12.
  • the first layer 35a is moved past in the direction of the arrow 19 under the nozzle 41, the outer surface of the layer 35a being re-moistened by spraying with water or a water mist.
  • the second layer 35b is sprinkled on this re-moistened surface of the layer 35a as it passes the scattering head 26b, the outer surface of which is now moistened with water by means of the nozzle 42.
  • the third layer 35c is then sprinkled onto this layer, the outer surface of which is subsequently moistened with water via the nozzle 43.
  • the mat-like shaped body thus formed is compacted in a press arranged downstream of the molding line 12, then cut to length and then deposited for setting and drying.
  • the individual devices of the system according to the invention such as the weighing devices 2 and 7, the mixers 4 and 9, the metering devices 3, 6 and 8 and the spreading machines 11a to 11c operate continuously, so that plates can be produced continuously without interruption.
  • a plate of high strength can be produced.
  • a total of up to 25%, preferably 15% to 20%, water is added above the stoichiometric amount of water, which enables mass transport of calcium sulfate ions in all directions and the gypsum body to crystallize in well-formed, idiomorphic, needle-shaped crystals which interact with one another are grown together and matted.
  • Such a plate has excellent structural properties and shows a significantly higher transverse tensile and bending strength than conventional plates. In particular, an excellent plate surface is achieved, which is free of pox-like elevations and therefore does not have to be reworked.
  • FIG. 4 The effect of the superstoichiometric addition of water on the order of 15% to 20% can be seen from FIG. 4. It shows the bending tensile strength versus density with different water additions. You can see the typical parabolic course. With a higher proportion of superstoichiometric water, higher strengths are obtained. In the range of densities between 1.15 and 1.2 realized in practice, the strength is doubled compared to the stoichiometric addition of water. This diagram clearly shows the positive effect with regard to the higher strength of gypsum fibreboards when water is added in excess of stoichiometry.
  • FIGS. 3c to 3e The plates that can be produced using the method according to the invention are shown in FIGS. 3c to 3e.
  • a plate 35 is shown in section, which was produced by previously known methods.
  • a plate is drawn in section, which is produced by the method according to the invention and in which the transverse tensile and bending strengths are considerably improved and in which the surfaces 38 are also formed much stronger, which can be achieved by spraying the plates with water on both sides is.
  • the plate produced according to the method further developed according to the invention in which the mass flow of the gypsum-fiber mixture is divided into separate partial mass flows and each scattered layer is re-moistened with water, the total amount of water supplied to the plate being up to 25% above the stoichiometric amount of water for setting gypsum-fiber mixture scattered to form the molded body, consist of three layers 35a to 35c and are based on a division of the mass flow into an odd number of partial mass flows, namely into three partial mass flows. Three partial mass flows are sufficient to produce a 10 mm thick gypsum fibreboard with high strength and a middle core layer. However, it may be advantageous to choose a higher layer division.
  • 3c was composed of three partial mass flows of the same volume. In the area of the layer boundaries, a higher solidification of the gypsum is achieved.
  • the volumes of the partial flows are selected such that a layer thickness of 1 to 7 mm results after the compression molding. However, the volumes of the partial flows are preferably dimensioned such that that after the compression molding there is a layer thickness of 2 to 3 mm.
  • the plate shown in section in FIG. 3d was also composed of three partial mass flows.
  • the partial mass flow forming the core layer 35b was provided with a larger mass volume than the remaining partial mass flows of the outer layers 35a and 35c.
  • Additives 44 were added to the partial mass flow forming the core layer.
  • a light aggregate such as vermiculite or kenospheres can be useful for the core layer.
  • the addition of mica to the core layer and / or the outer layers can significantly improve the fire protection properties of the board.
  • Gypsum can also be mixed into the outer or inner layer as an additive.
  • aggregates in the form of other reinforcing fibers such.
  • the plate shown in section in FIG. 3e corresponds in structure to the plate from FIG. 3c.
  • a pigment additive was added to the amount of water supplied via the last spray nozzle 43, so that a surface 39 of bonded pigment is formed.
  • any additives such as. B. a setting accelerator can be added.
  • These additives are preferably water soluble. It may be expedient to add other additives to the amount of water supplied to the outer layers than to the amounts of water supplied to the inner layers.
  • the additives for the amounts of water in the outer layers are preferably in the form of suspensions or dispersions.
  • FIG. 2 shows a device for carrying out the method according to the invention, which largely corresponds to the basic structure of the device according to FIG. 1. The same parts are provided with the same reference numbers.
  • the division of the mass flow into several partial mass flows is already provided at the outlet of the dry mixer 4.
  • the dry premixed amount of gypsum fiber arrives via the outlet 4a of the dry mixer directly into an allocation device 37a which divides the mass flow into individual mass flows of the same or different volume.
  • This division preferably takes place by clocked deflection of the main mass flow onto conveyor belts of the partial mass flows. These conveyor belts open into intermediate bunkers 6a to 6c.
  • a division into three partial mass flows is provided; three gypsum fiber metering devices 6a to 6c are arranged accordingly.
  • the structure of the gypsum-fiber metering devices 6a to 6c corresponds to the gypsum-fiber metering device 6 from FIG. 1.
  • the gypsum-fiber metering device opens into a damp mixer 9, which corresponds to the amount of gypsum / fiber mixture drawn off Control device 18 controlled - water is added. Furthermore, the desired amount of additive is supplied to each partial mass flow via an additive metering device 50, the amount being determined by weight from a metering scale 50a and reported to the control device 18.
  • the outlet 9a of the wet mixer 9 opens directly onto one of the conveyor belts 10a to 10c, which feeds the mixture moistened in the partial mass flow directly to an assigned spreading machine 11a to 11c.
  • the device according to FIG. 2 also has the advantage that the additives to be mixed into a partial mass flow can be mixed in dry.

Claims (12)

  1. Procédé de fabrication en continu de pièces moulées, en particulier de panneaux, à partir d'un mélange de plâtre et de matière fibreuse, dans lequel des quantités respectives dosées de plâtre et de matière fibreuse sont mélangées intimement au cours d'une première opération de mélange en continu, le mélange sec de plâtre et de matière fibreuse est ensuite mouillé au cours d'une seconde opération de mélange en continu avec addition dosée d'une quantité d'eau, de sorte que, avant la seconde opération de mélange, la masse du mélange sec de plâtre et de matière fibreuse est mesurée en continu et l'addition d'eau est adaptée en fonction de la masse mesurée, dans lequel le mélange mouillé est répandu sur un support pour former des pièces moulées, puis comprimé, et dans lequel la quantité d'eau totale amenée est supérieure à la quantité d'eau stoechiométrique nécessaire à la prise du mélange de plâtre et de matière fibreuse, caractérisé en ce que
    l'addition d'eau dans la seconde opération de mélange est adaptée de sorte que la quantité d'eau ajoutée est maintenue en-dessous d'une valeur limite à laquelle le mélange mouillé de plâtre et de matière fibreuse tend à former des granulés et respectivement des matons,
    le flux massique du mélange de plâtre et de matière fibreuse est divisé en flux massiques séparés l'un de l'autre, en sorte que chaque flux massique partiel est répandu pour former une couche de la matière moulée sur le support et respectivement sur une couche précédente,
    et une quantité d'eau supplémentaire est ajoutée de telle façon que chaque couche répandue du mélange mouillé de plâtre et de matière fibreuse est remouillée séparément avec de l'eau.
  2. Procédé selon la revendication 1, caractérisé en ce que la quantité d'eau totale amenée est supérieure jusqu'à 25%, de préférence 15% à 20%, à la quantité d'eau stoechiométrique.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la répartition du mélange de plâtre et de matière fibreuse se fait, avec addition d'eau dosée, après la seconde opération de mélange (fig. 1).
  4. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la répartition du mélange de plâtre et de matière fibreuse intervient après la première opération de mélange et que l'addition d'eau dosée est effectuée dans les flux massiques partiels.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les flux massiques partiels sont répartis de manière à présenter des volumes différents, et que des additifs sont ajoutés aux différents flux massiques partiels, avec mélange supplémentaire.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que chaque flux massique partiel est stocké dans un réservoir intermédiaire avant l'entrée dans une machine d'épandage (11a à 11c) associée.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que les volumes des flux partiels sont choisis de façon à obtenir après le moulage par compression une épaisseur de couche de respectivement 1 mm à 7 mm, de préférence de 2 mm à 4,5 mm.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que la quantité d'eau pulvérisée sur les différentes couches (35a à 35c) varie, de préférence de telle façon que la quantité d'eau pulvérisée sur les couches extérieures de la pièce moulée (35) est plus grande que la quantité d'eau amenée à la ou les couche(s) située(s) à l'intérieur.
  9. Procédé selon la revendication 8, caractérisé en ce qu'à la quantité d'eau amenée aux différentes couches peuvent être ajoutés des additifs tels que des suspensions ou des dispersions, des additifs différents pouvant être ajoutés aux quantités d'eau amenées aux couches extérieures et aux quantités d'eau amenées à la ou aux couche(s) située(s) à l'intérieur.
  10. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 9, avec un premier dispositif de dosage (2, 3) pour l'addition dosée de plâtre et de fibres dans un premier mélangeur (4) installé en aval, avec un second mélangeur (9) recevant le mélange de plâtre et de fibres et auquel est associé un dispositif de dosage pour le liquide (8) et avec un dispositif de commande installé en aval pour le répandage du mélange de plâtre et de fibres mouillé sur une chaîne de moulage (12) suivie d'un dispositif de compression, caractérisé en ce qu'entre le mélangeur à sec (4) et le second mélangeur (9) est placé un dispositif de dosage (7) mesurant en continu le poids et/ou le volume du mélange sec de plâtre et de fibres, et qu'à ce dispositif de dosage de plâtre et de fibres (7) est associé un dispositif de dosage d'eau (8) dont la sortie (8') débouche dans le second mélangeur (9) monté en aval, et que le dispositif de commande (11) est constitué de plusieurs machines d'épandage, que, dans la direction de transport (19) de la chaîne de moulage (12), des pulvérisateurs (40 ; 43) pour le remouillage des surfaces de la pièce moulée répandue sont disposés en avant et en arrière des têtes d'épandage extérieures (26a, 26c), et que, entre les pulvérisateurs (40 ; 43), dans la direction de transport (19) de la chaîne de moulage (12), est prévue une succession de plusieurs têtes d'épandage (26a, 26b, 26c) séparées les unes des autres et alimentées par les flux massiques partiels pour le répandage séparé de différentes couches (35a, 35b, 35c) de la pièce moulée (35), et que respectivement au moins un pulvérisateur supplémentaire (41, 42) est prévu entre les têtes d'épandage, dans la direction de transport (19).
  11. Dispositif selon la revendication 10, caractérisé en ce qu'en aval du mélangeur par voie humide (9) est prévu un dispositif de dosage (37) suivi de plusieurs machines d'épandage (11a, 11b, 11c) séparées les unes des autres et équipées de têtes d'épandage (26a, 26b, 26c) (fig. 1).
  12. Dispositif selon la revendication 11, caractérisé en ce qu'en aval du mélangeur à sec est prévu un dispositif de dosage (37a) pour le flux massique du mélange sec de plâtre et de fibres auquel sont associés, conformément au nombre des flux massiques partiels, des dispositifs de dosage (6a, 6b, 6c) séparés les uns des autres et des mélangeurs par voie humide (9), chaque mélangeur par voie humide (9) étant suivi d'une machine d'épandage (11a, 11b, 11c) (fig. 2).
EP85100748A 1984-02-10 1985-01-25 Procédé de fabrication de pièces moulées, notamment de panneaux, à partir d'un mélange de plâtre et de matériau fibreux ainsi que dispositif pour la mise en oeuvre du procédé Expired - Lifetime EP0153588B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85100748T ATE48105T1 (de) 1984-02-10 1985-01-25 Verfahren zur kontinuierlichen herstellung von formkoerpern, insbesondere von platten, aus einer mischung von gips- und faserstoff sowie vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19843404658 DE3404658A1 (de) 1984-02-10 1984-02-10 Verfahren zur kontinuierlichen herstellung von formkoerpern, insbesondere von platten, aus gips und faserstoff und vorrichtung zur durchfuehrung des verfahrens
DE3404658 1984-02-10
DE19843439493 DE3439493A1 (de) 1984-10-27 1984-10-27 Verfahren zur kontinuierlichen herstellung von formkoerpern, insbesondere von platten, aus einer mischung von gips- und faserstoff sowie vorrichtung zur durchfuehrung des verfahrens
DE3439493 1984-10-27

Publications (3)

Publication Number Publication Date
EP0153588A1 EP0153588A1 (fr) 1985-09-04
EP0153588B1 EP0153588B1 (fr) 1989-11-23
EP0153588B2 true EP0153588B2 (fr) 1994-04-20

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EP85100748A Expired - Lifetime EP0153588B2 (fr) 1984-02-10 1985-01-25 Procédé de fabrication de pièces moulées, notamment de panneaux, à partir d'un mélange de plâtre et de matériau fibreux ainsi que dispositif pour la mise en oeuvre du procédé

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EP (1) EP0153588B2 (fr)
CA (1) CA1261125A (fr)
DE (1) DE3574353D1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3604388A1 (de) * 1984-10-27 1987-08-13 Wuertex Maschinenbau Hofmann G Verfahren zur kontinuierlichen herstellung von formkoerpern insbesondere von platten, aus einer mischung von gips und faserstoff sowie vorrichtung zur durchfuehrung des verfahrens
DE3708875C3 (de) * 1987-03-18 2001-09-06 Kvaerner Panel Sys Gmbh Verfahren zur Herstellung von Formkörpern, insbesondere Platten
DE3708873C2 (de) * 1987-03-18 1996-04-04 Baehre & Greten Verfahren und Vorrichtung zur Herstellung eines rieselfähigen, insbesondere zur Fertigung von Platten bestimmten Gemisches aus faserigem und/oder spanförmigem Holzmaterial und Gips
DE3801315C2 (de) * 1988-01-19 1994-05-26 Babcock Bsh Ag Anlage zur Herstellung von plattenförmigen Körpern aus einer Mischung von Gips und Faserstoff
US5277856A (en) * 1988-12-02 1994-01-11 Bison-Werke Bahre & Greten Gmbh & Co. Kg Method for manufacturing shaped bodies from gypsum, water, fibers and light aggregate particles
DE3906009C1 (fr) * 1989-02-26 1990-09-06 Wuertex Maschinenbau Hofmann Gmbh & Co, 7336 Uhingen, De
US5342566A (en) * 1990-08-23 1994-08-30 Carl Schenck Ag Method of manufacturing fiber gypsum board
DE4031935C2 (de) * 1990-10-09 1999-09-16 Norbert Seddig Verfahren zur Herstellung gipsgebundener lignocellulosehaltiger Formkörper und gipsgebundener cellulosehaltiger Formkörper
DE4222872C2 (de) * 1991-08-09 1996-01-25 Siempelkamp Gmbh & Co Dreischichtige Baustoffplatte auf Gipsbasis und Verfahren zur Herstellung
DE4129466A1 (de) * 1991-09-05 1993-03-11 Bold Joerg Verfahren zur herstellung von gipsfaserplatten nach einem halbtrockenverfahren
WO1993011085A1 (fr) * 1991-11-25 1993-06-10 Carl Schenck Ag Planche de platre fibreux et son procede de fabrication
DE4239033A1 (fr) * 1992-03-19 1993-09-23 Fraunhofer Ges Forschung
GB2281231B (en) * 1993-07-12 1997-11-19 Bpb Industries Plc A method of manufacturing multilayer plasterboard and apparatus therefor
CA2130508C (fr) * 1993-08-20 2005-04-12 Peter Douglas Chase Procede de fabrication de panneaux de gypse enduits de scellant, de faible epaisseur et renforces de fibres, et panneaux ainsi fabriques
US6443258B1 (en) * 1999-10-01 2002-09-03 Awi Licensing Company Durable porous article of manufacture and a process to create same
US6780356B1 (en) 1999-10-01 2004-08-24 Awi Licensing Company Method for producing an inorganic foam structure for use as a durable acoustical panel
NO3013768T3 (fr) * 2013-06-26 2018-02-17
CN113681702A (zh) * 2021-08-17 2021-11-23 四川吉浦森建材有限公司 一种石膏板配料及浇灌装置及方法
CN115319888B (zh) * 2022-09-01 2023-12-01 吉林建筑大学 一种玄武岩纤维复合一体墙板的加工设备及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243163A (en) * 1963-07-01 1966-03-29 Norton American Aviat Inc Viscous and non-viscous material processing system
NL7801229A (nl) * 1977-02-09 1978-08-11 Rhone Poulenc Ind Werkwijze voor het samenpersen van stucgips- mengsels.
US4239716A (en) * 1977-05-30 1980-12-16 Nippon Hardboard Co. Ltd. Gypsum moldings as building materials and methods manufacturing the said gypsum moldings
CH621597A5 (fr) * 1978-02-13 1981-02-13 Epsi Brevets & Participations
DE3216886A1 (de) 1982-05-06 1983-11-10 "Würtex" Maschinenbau Hofmann GmbH & Co., 7336 Uhingen Verfahren zur kontinuierlichen herstellung von formkoerpern, vorzugsweise von platten, aus gips und faserstoff sowie vorrichtung zur durchfuehrung eines solchen verfahrens

Also Published As

Publication number Publication date
DE3574353D1 (en) 1989-12-28
EP0153588B1 (fr) 1989-11-23
CA1261125A (fr) 1989-09-26
EP0153588A1 (fr) 1985-09-04

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