EP0602134B1 - Procede et installation pour produire des plaques de staff par un procede mixte - Google Patents

Procede et installation pour produire des plaques de staff par un procede mixte Download PDF

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Publication number
EP0602134B1
EP0602134B1 EP92918928A EP92918928A EP0602134B1 EP 0602134 B1 EP0602134 B1 EP 0602134B1 EP 92918928 A EP92918928 A EP 92918928A EP 92918928 A EP92918928 A EP 92918928A EP 0602134 B1 EP0602134 B1 EP 0602134B1
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EP
European Patent Office
Prior art keywords
water
layer
belt
moistening
press
Prior art date
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Expired - Lifetime
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EP92918928A
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German (de)
English (en)
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EP0602134A1 (fr
Inventor
Jörg Bold
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Grenzebach GmbH and Co KG
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Babcock BSH AG
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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
    • B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
    • B28B17/02—Conditioning the material prior to shaping
    • B28B17/023—Conditioning gypsum
    • 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
    • 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
    • B28B5/02—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 on conveyors of the endless-belt or chain type
    • B28B5/026—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 on conveyors of the endless-belt or chain type the shaped articles being of indefinite length
    • B28B5/027—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 on conveyors of the endless-belt or chain type the shaped articles being of indefinite length the moulding surfaces being of the indefinite length type, e.g. belts, and being continuously fed

Definitions

  • the invention relates to a method and a device according to the preambles of claims 1 and 7.
  • a mixture of binder, reinforcing materials and, if necessary, fillers is usually, in several layers, spread on a forming belt that is continuously moving under spreading devices and then compressed in a press.
  • Gypsum or gypsum mixtures e.g. from hemihydrate, dihydrate, cement and additives, such as setting accelerators and / or retarders, as reinforcing agents fibers, e.g. from waste paper, and as fillers, e.g. Perlite used.
  • the additives can also be added to the water first and to the mixture with the water.
  • the disadvantages associated with this procedure are, for example, the need for a dewatering press, the accumulation of squeezed water with suspended gypsum and a high residual moisture remaining in the pressed board to be dried out.
  • the water is supplied in two portions.
  • the first portion of the water is supplied with a dry mixture of gypsum and fibers in the preparation of the sprinkle mixture.
  • the second portion of the water is sprayed onto the individual layers of the scattered layer immediately after the layers have been spread.
  • the spread and moistened layer is then pre-compressed in a pre-press and compressed to final size in a main press.
  • DE-A-38 01 315 it is known from DE-A-38 01 315 to allow an upper screen belt to run in the presses during compression for ventilation. Furthermore, it is known from DE-C-39 06 009 to supply the first part of the water via moistened and ground paper fibers. This saves a mixer for producing the dry mixture. The scatterable mixture is produced by mixing gypsum and the fibers provided with the first part of the water.
  • Another disadvantage is that devices for spraying the layers are arranged between the spreading devices.
  • this arrangement leads to the fact that the different layers of the layer cover different distances up to the presses and are thus moistened at different times. This leads to a different start of the setting of the plaster in the different layers.
  • the object of the invention is to develop a method according to the preamble of claim 1, which enables more uniform moistening with the least possible effort, and a corresponding device according to the preamble of claim 7.
  • the sprinkled layer is moistened with the second partial amount of water to 110 to 180% of the plate thickness, i.e. of the final dimension of the plates, pre-compressed. Both sides of the layer are moistened in succession during the pre-compaction or directly afterwards. Only after moistening with the entire second part of the water is the pre-compressed layer compressed to the plate thickness.
  • a layer is produced that can absorb water much better than the scattered layer but also as the layer that has already been compacted to plate thickness.
  • a particularly uniform moistening over the layer height is achieved with pre-compaction to 110 to 150% of the plate thickness.
  • the method according to the invention achieves a much more uniform setting. This leads to improved board quality, especially higher strength.
  • a total amount of water of 35 to 45% of the dry matter is supplied.
  • This total amount of water which corresponds to about 2 to 3 times the amount of water stoichiometric for setting the gypsum, enables the pre-compressed layer to be moistened evenly without water being squeezed out when compacting to plate thickness.
  • a mixture to be spread with a water quantity of 15 to 27% of the dry mass contains on the one hand a high proportion of the total amount of water to be supplied and on the other hand is still easy to spread. A larger amount of water would lead to granulation or lumping of the mixture. Mixtures with a water quantity of 18 to 24% of the dry matter are particularly suitable, in particular they are easy to spread.
  • the top of the layer is moistened during the pre-compaction and the underside after the pre-compaction. Moistening during pre-compression leads to particularly good water absorption by the layer.
  • the water absorption can be compressed and moistened alternately, e.g. with the help of a roller press and dampening devices arranged between the rollers of the roller press can be further improved. Springing back of the layer after compression and during moistening causes a suction effect that supports the water absorption of the layer.
  • one or both sides of the layer are moistened by spraying.
  • a regulation of the amount of water supplied by measuring the difference between the amount of water supplied and the collected, running water according to claim 4 enables precise metering of the amount of water supplied. This is particularly advantageous when spraying the underside of the layer, since water can easily drip from the underside.
  • the underside of the layer can also be moistened by guiding the pre-compressed layer through a water bath.
  • the pre-compressed layer is passed through the water bath so that only the underside of the layer is wetted.
  • a sieve belt with water-impermeable, raised edges prevents water from penetrating into the layer at the two edges of the layer and flowing onto the surface of the layer.
  • the amount of water for moistening the underside of the layer is metered into the water bath.
  • a self-regulating mechanism of water absorption of the layer is used.
  • the layer is fed into the water bath and back at a small angle. Your water absorption grows steadily with the wetted surface and thus with increasing water level.
  • a water level is set at which this supply and the decrease by the layer are in equilibrium.
  • the layer always absorbs the amount of water supplied, regardless of how this water absorption is done in detail.
  • Vacuum is preferably applied in the first zone in order to remove the air located in the pores of the layer and the sieve belts. In the case of several zones, overpressure and underpressure are then preferably applied alternately.
  • the system according to claim 7 is particularly suitable for carrying out the method according to claim 1
  • the system according to claim 8 is particularly suitable for carrying out the method according to claim 3
  • the system according to claim 9 is particularly suitable for carrying out the method according to claim 5.
  • the systems according to claim 10 and claim 11 are particularly suitable for performing the method according to claim 6.
  • forming the undersides of the boxes or arranging the guide rollers so that they form a sliding surface concave in the conveying direction enables the layer to be guided well through the trough.
  • a large depth of the trough and guide devices prevent turbulence in the trough, which could arise due to the layer passed through the trough.
  • Figure 1 shows a system of the prior art.
  • FIG. 6 shows a tub for moistening the underside of the layer of example 4
  • FIG. 7 shows a vertical section A-A perpendicular to the conveying direction of the tub and
  • FIG. 8 shows an enlarged section of FIG. 7.
  • a known plant for the production of gypsum fibreboards by a semi-dry process has storage devices for water, possibly additives, gypsum, fibers and possibly fillers.
  • a conveyor device leading from a paper container via a grinding device opens into the storage device for fibers.
  • the system has two mixers 1a, 1b, to each of which a line leads from the storage device for water and the dry mixer via a metering device. If necessary. leads a further line from the storage device for fillers via a metering device to the second mixer 1b.
  • Mixers 1a, 1b can e.g. horizontal continuous mixer with rotating mixing shaft or rotary tube mixer.
  • the system has three spreading devices 2a, 2b, 2c, which are arranged one behind the other over a forming belt 3 in its conveying direction.
  • the output of the first mixer 1a is connected to the first and third spreading devices 2a, 2c via conveyor belts and the output of the second mixer 1b is connected to the second spreading device 2b via a conveyor belt.
  • a further spray device 4b is located between the second and third spreading devices 2b, 2c and a third spray device 4c behind the third spreading device 2c.
  • a pre-press 5 e.g. a roller press.
  • the forming belt 3 is guided over the lower rollers and a wire belt 6 over the upper rollers of the pre-press 5.
  • the forming belt 3 and the wire belt 6 are both also guided by a main press 7, also a roller press, arranged behind the pre-press 5.
  • the main press 7 has additional steel belts 8 guided within the forming belt 3 and within the wire belt 6.
  • the sieve belt 6 extends over a vacuum box 10, which is arranged behind the main press 7 at the level of the upper rollers and is connected to a blower 9, and is returned behind the latter.
  • the forming tape 3 projects under the vacuum box 10 and is returned in its first quarter. It is designed as a closed plastic band.
  • Another lower belt 11 begins in the last quarter of the vacuum box 10, so that a distance remains below the vacuum box 10 between the forming belt 3 and the lower belt 11.
  • a lower spray device 12 with nozzles for spraying the underside of the layer is arranged.
  • An upper spray device 13 with nozzles is located after the return of the sieve belt 6 above the lower belt 11.
  • the lower belt 11 is formed by a secondary press 14, a roller press, connected to the upper rewetting device 13, with an upper belt and (not shown) by further devices e.g. led to drying the plates.
  • FIG. 1 also shows a paper preparation device 15 which, in addition to storage devices for additives, paper and water, has a mixer to which lines lead from the storage devices via metering devices.
  • a pre-shredder is arranged in the line from the storage device for paper to the mixer between the storage device and the metering device.
  • the outlet of the mixer is optionally connected to the storage container for fibers via a metering device and a grinding device.
  • the storage device for water and the dry mixer are no longer necessary.
  • a mixture of gypsum, fibers and the first portion of the water is scattered by the spreading devices 1a, 1b, 1c in three layers onto the continuously moving forming belt 3.
  • Each layer is moistened with a portion of the second portion of the water immediately after being sprinkled by the spray devices 4a, 4b, 4c.
  • the mixer 1a feeds the first and third spreading devices 1a and 1c which cover the lower and upper layers, i.e. form the outer layers, the scattered layer.
  • fillers can be introduced into the second mixer 1b, which feeds the second spreading device 1b. This means that a different composition can be selected for the middle layer of the scattered layer.
  • the scattered and moistened layer is first compressed to plate thickness in the pre-press 5 and then in the main press 7.
  • the resulting plate is then moistened in succession from below and from above with the rest of the second part of the water. During the rewetting from below, the plate is held by the vacuum box 10.
  • the re-moistened plate is post-compressed in the post-press 14.
  • the paper When using the paper preparation device 15, the paper is pre-shredded and mixed with the first portion of the water, ie up to 200% of the dry mass of the paper and possibly additives. After a certain storage time, the pre-moistened paper is ground into fibers in the grinding device and conveyed into the storage device for fibers.
  • the moistened fibers are mixed with gypsum and the mixture is then fed to the spreading devices 2a, 2b, 2c.
  • a system according to the invention differs from a system of the prior art in the following features. It has an additional lower sieve belt 16.
  • the lower sieve belt 16 is located below the spreading devices 2a, 2b, 2c arranged directly one behind the other and in the pre-press 5 on the forming belt 3, which is fed back behind the pre-press 5.
  • the forming belt 3 can be replaced by a sliding table.
  • the lower sieve belt 16 extends through the main press 7, in which it is located on the lower steel belt 8.
  • Prepress 5 and main press 7 are arranged at a distance from one another.
  • a lower spray device 18 provided with a metering device 17 is first arranged below the lower screen belt 16.
  • the system according to the invention has no spray devices 4a, 4b, 4c between the spreading devices 2a, 2b, 2c and no postpress 14.
  • the mixture is sprinkled on the forming belt 3 in three layers.
  • the scattered layer has a height of approximately 50 mm and is raised to a height of 12 mm in the pre-press 5, i.e. to about 120% of the plate thickness, pre-compressed. It springs back to about 16 mm.
  • the spraying devices 18, 22, 2,280 l / h of water i.e. a total of 18% of the dry matter, sprayed on the layer.
  • the amount of water supplied is regulated by measuring the difference between the amount of water supplied and the amount discharged. Overall, a water volume of about 40% of the dry matter, i.e. approximately 3 times the stoichiometric amount of water.
  • the layer is compressed to a plate thickness of 10.3 mm. After setting, the raw board still contains 14.2% residual moisture. After drying, a plate with a density of 1,150 kg / m3 and a bending strength of 8.0 N / mm is obtained.
  • the upper screen belt 6 is only guided through the main press 7.
  • a second upper screen belt 25 extends through the pre-press 5, along the vacuum box 21 arranged opposite the lower spray device 18 and along a further transfer vacuum box 27 connected to a blower 26.
  • the upper screen belt 25 is returned behind the transfer vacuum box 27.
  • the upper spray device 22 is arranged between the return of the upper screen belt 25 and the main press 7.
  • the lower screen belt 16 extends through the pre-press 5, along the lower spray device 18 and over one or more separation nozzles 29 connected to a blower.
  • the release nozzles 29 are arranged at the end of the vacuum box 21.
  • the lower screen belt 16 extends to the front edge of the transfer vacuum box 27 in the conveying direction and is returned there.
  • Another smooth, lower belt 30 begins at the rear edge of the transfer vacuum box 27, extends below the upper spray device 22 and is guided through the main press 7. Accordingly, no vacuum box is arranged opposite the upper spray device 22.
  • the layer pre-compressed in the pre-press 5 is first moistened by the spray device 18 on the underside.
  • the layer is then detached from the lower screen belt 16 by blowing air through the release nozzles 29 and transferred to the smooth lower belt 30 with the aid of the transfer vacuum box 29.
  • the layer is moistened by spray device 22 on the upper side and compressed to plate thickness in the main press 7.
  • the underside of the plate is smoothed by the smooth, lower band 30.
  • a system of Example 3 differs from that of Example 2 in that the lower screen belt 16, as in Example 1, is carried out through the main press 7. Accordingly, a vacuum box 24 with a blower 23 is arranged opposite the upper spray device 22 arranged directly in front of the main press 7.
  • the system of example 3 also differs from that of example 2 in the lower moistening device.
  • the lower moistening device has a trough 32 provided with a metering device 31.
  • Outer guide rollers 33 are arranged above the front and rear edge of the tub 32 in the conveying direction. Extending between the outer guide rollers 33 is a box 34, which is divided in two in the conveying direction and has air openings on its underside, to whose front half a suction fan 35 and to the rear half of which a pressure fan 36 is connected.
  • the underside of the box 34 projecting into the trough 32 is designed as a sliding surface which is concavely curved in the conveying direction. The curvature corresponds approximately to a radius of 5 to 15 m. It is important that the outer guide rollers 33 and the box 34 are arranged so that the sieve belts 16, 25 are led down and back at a small angle.
  • the upper sieve belt 25 is returned behind the tub 32. At this point, the lower screen belt 16 is guided over a further roller 37.
  • the layer pre-compressed in the pre-press 5 is guided through the trough 32 such that only the underside of the layer is wetted.
  • air is first sucked from the layer and the sieve belts 16, 25 from the top in a first zone and an overpressure is then applied to the top of the layer in a second zone.
  • the pressure is adjustable.
  • a precisely metered amount of water is passed into the tub 32 and is taken up by the layer. Subsequently, the top of the layer is moistened by the spraying devices 22 and finally the layer is compressed to plate thickness in the main press 7.
  • Example 4 In the installation of Example 4, the upper screen belt 6 and the lower screen belt 16 are passed through the pre-press 5, in which the upper spray device 22 is arranged, the lower moistening device and the main press 7.
  • Upper and lower pressure rollers 38 of the pre-press 5 are arranged at a distance from one another.
  • Nozzles 39 of the upper spray device 22 are located between the upper pressure rollers 38.
  • the lower moistening device has the tub 32 described in Example 3 and provided with a metering device 31.
  • Suction / pressure boxes 40 and further guide rollers 41 are arranged in succession between the outer guide rollers 33 arranged above the edges of the tub 32.
  • The, in this example four, boxes 40 are connected via lines 42 to the suction fan 35 and the pressure fan 36.
  • Valves 43 are located in the lines 42, so that the blowers 35, 36 can optionally be switched to the boxes 40 and the respective air pressure is adjustable.
  • the guide rollers 41 form a sliding surface which is concavely curved in the conveying direction, as in example 3, along which the upper and the lower screen belt 25, 16 are guided through the trough 32.
  • the immersion depth of the lower sieve belt 16 corresponds in magnitude to the layer thickness.
  • the extent of the trough 32 in the conveying direction corresponds approximately to that of the main press 7, for example 3 to 5 m. It is about 25 cm wider than the layer on both sides. Their depth is about 10 times the plate thickness.
  • the lower sieve belt 16 is wider than the upper sieve belt 6 (or upper sieve belt 25, example 3). Its side edges are sealed with elastic plastic 46. The cover protrudes 5 cm on both sides into the area of the pre-compacted layer.
  • the lower screen belt 16 is guided in the tub 32 at its edges via rollers 47. The rollers 47 are arranged so that the edges of the lower screen belt 16 are bent up.
  • the tub 32 is provided with an inlet 48 at its front end.
  • the inlet 48 is designed in the manner of a diffuser with an overflow extending over the entire width of the trough (not shown).
  • the metering pump 31 is connected to the inlet 48 via a flow meter 49.
  • the scattered layer in the pre-press 7 is alternately compressed by the pressure rollers 38 and sprayed in the area between the pressure rollers 38.
  • the springback of the layer leads to an increased suction of the water into the layer when the pressure between the pressure rollers 38 is relieved.
  • the precompressed layer arranged between the sieve belts 16, 25 is then passed through a water bath, specifically through the trough 32 supplied with water, so that only the underside of the layer is wetted. This is ensured by the raised edges of the lower sieve belt 16 sealed with plastic 46.
  • the layer is applied at a small angle, e.g. 1 to 10 °, in the water bath and returned. Thanks to the self-regulating mechanism described, it absorbs exactly the amount of water added.
  • the layer is alternately loaded and unloaded by the guide rollers 28, 41.
  • the spring back of the layer between the guide rollers 28, 41, as in the upper spray device 22 of this example, increases the moistening of the layer by suction of the water.
  • This resilience of the layer during moistening can also be achieved by running the layer in a water bath along a curved surface, the radius of which is constantly increasing.
  • Air is first sucked in from the layer in a first zone through the suction / pressure boxes 40 between the guide rollers in order to remove the air from the layer and above all the lower wire belt 16.
  • a certain air pressure is then applied from above to the layer led through the water bath in a second zone. This applied air pressure counteracts the uneven moistening of areas of different densities in the layer.
  • the boxes 40 can also be operated in such a way that air is alternately sucked in through one box 40 in one zone and air is given in through the next in the following zone, with the first box 40, i.e. in the first zone, air is always sucked in.
  • each of the mixers 1a and 1b are dosed with the following quantities: Gypsum hemihydrate (stucco; 5.9% H2O) 10,500 kg / h Gypsum dihydrate (ground) 50 kg / h Paper fibers (dry weight) 2,000 kg / h Water (contained in the paper fibers) 2,800 kg / h
  • the paper fibers impregnated with water are produced in the paper preparation device 15.
  • the 30,700 kg / h of the mixture of gypsum, fibers and water, the amount of water being about 22% of the dry matter, is scattered in rotating layers.
  • the spreading height is about 45 mm.
  • the layer is pre-compressed in the pre-press 5 to a thickness of 11.5 mm, ie approximately 112% of the plate thickness. It springs back to 15 mm.
  • 2,400 l / h water is sprayed from above. In the tub 32, the layer also absorbs 2,400 l / h of water from below.
  • the layer is compressed to a plate thickness of 10.3 mm. After setting, the raw board still contains 14.2% residual moisture. After drying, a plate with a density of 1,170 kg / m3 and a bending strength of 9.2 N / mm is obtained.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Paper (AREA)

Abstract

Pour produire des plaques de staff par un procédé mixte, un mélange humidifié de plâtre et de fibres est dispersé sur une bande en mouvement. L'eau manquante est ajoutée au mélange après ou pendant une étape de précompression dans une presse préliminaire et avant l'étape de compression finale dans la presse principale. Plusieurs possibilités et modes de réalisation sont décrits.

Claims (12)

  1. Procédé de fabrication de plaques de staff par un procédé mixte, une couche au moins d'un mélange de plâtre, de fibres et d'eau, étant épandue sur une courroie mobile en continu, la couche épandue étant compactée, humidifiée successivement sur ses deux faces, et postcompactée, caractérisé en ce que la couche épandue est précompactée à 110 - 180 %, 110 - 150 % de préférence, de l'épaisseur de plaque, est humidifiée pendant le précompactage ou directement après, et est enfin compactée à l'épaisseur de plaque.
  2. Procédé suivant la revendication 1, caractérisé en ce qu'un mélange est épandu avec une quantité d'eau de 15 à 27 %, de 18 à 24 % de préférence, de la masse sèche, et en ce qu'une quantité d'eau de 10 à 30 %, de 15 à 25 % de préférence, de la masse sèche, est injectée lors de l'humidification, la quantité totale d'eau s'élevant à 35 - 45 % de la masse sèche.
  3. Procédé suivant l'une des revendications 1 ou 2, caractérisé en ce que la face supérieure de la couche est humidifiée pendant le précompactage, et la face inférieure après le précompactage.
  4. Procédé suivant l'une quelconque des revendications 1 à 3, l'humidification de l'une ou des deux faces de la couche étant assurée par aspersion, caractérisé en ce que la quantité d'eau d'alimentation est réglée par une mesure différentielle de la quantité d'eau amenée et écoulée.
  5. Procédé suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que la couche est guidée au travers d'un bain d'eau, la couche étant amenée et ramenée du bain d'eau sous un angle réduit, seule sa face inférieure étant mouillée, et le bain d'eau étant alimenté en une quantité d'eau dosée pour l'humidification de la face inférieure.
  6. Procédé suivant la revendication 5, caractérisé en ce qu'une dépression ou surpression est appliquée sur la face supérieure de la couche, dans une zone au moins.
  7. Installation pour la réalisation d'un procédé suivant la revendication 1, avec un dispositif de mélange pour la préparation d'un mélange de plâtre, de fibres et d'eau, avec un dispositif d'épandage pour épandre le mélange en une ou plusieurs couches sur une courroie de moulage, avec une presse préliminaire, au travers de laquelle est guidée la courroie de moulage, avec un dispositif d'humidification supérieur et inférieur, le dispositif d'humidification inférieur étant disposé directement en aval de la presse préliminaire dans le sens de transport, avec un tamis supérieur, guidé au travers de la presse préliminaire et du dispositif d'humidification inférieur, et avec une presse principale, montée en aval des dispositifs d'humidification, caractérisée en ce qu'un tamis inférieur (16) est disposé sur la courroie de moulage (3), en ce que la courroie de moulage (3) est ramenée en aval de la presse préliminaire (5), et en ce que le tamis inférieur (16) s'étend au moins jusqu'au-dessus du dispositif d'humidification inférieur (18, 32).
  8. Installation suivant la revendication 7, caractérisée en ce que la presse préliminaire (5) présente des cylindres de pression supérieurs et inférieurs (38), disposés à distance les uns des autres, et en ce que le dispositif d'humidification supérieur présente un dispositif de pulvérisation (22), les buses (39) du dispositif (22) étant disposées entre les cylindres de pression supérieurs (38).
  9. Installation suivant l'une des revendications 7 ou 8, caractérisée en ce que le dispositif d'humidification inférieur présente une cuve (32) et des glissières pour le guidage du tamis supérieur et inférieur au travers de la cuve (32), et en ce que les bords du tamis inférieur (16) sont relevés et imperméables à l'eau.
  10. Installation suivant la revendication 9, caractérisée en ce qu'un caisson aspirant/soufflant (34), en plusieurs parties éventuellement, est disposé au-dessus de la cuve (32), la face inférieure du caisson aspirant/soufflant (34) formant une surface de glissement concave dans le sens de transport.
  11. Installation suivant la revendication 9, caractérisée en ce que des caissons aspirants/soufflants (40) et des cylindres de guidage (41) sont disposés alternativement les uns derrière les autres au-dessus de la cuve (32), les cylindres de guidage (41) formant une surface de glissement concave dans le sens de transport.
  12. Installation suivant l'une quelconque des revendications 9 à 11, caractérisée en ce que la profondeur de la cuve (32) est un multiple de l'épaisseur de plaque, et en ce que la cuve (32) présente des dispositifs conducteurs (44, 45).
EP92918928A 1991-09-05 1992-09-04 Procede et installation pour produire des plaques de staff par un procede mixte Expired - Lifetime EP0602134B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4129466A DE4129466A1 (de) 1991-09-05 1991-09-05 Verfahren zur herstellung von gipsfaserplatten nach einem halbtrockenverfahren
DE4129466 1991-09-05
PCT/EP1992/002055 WO1993004830A1 (fr) 1991-09-05 1992-09-04 Procede et installation pour produire des plaques de staff par un procede mixte

Publications (2)

Publication Number Publication Date
EP0602134A1 EP0602134A1 (fr) 1994-06-22
EP0602134B1 true EP0602134B1 (fr) 1995-02-15

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EP92918928A Expired - Lifetime EP0602134B1 (fr) 1991-09-05 1992-09-04 Procede et installation pour produire des plaques de staff par un procede mixte

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Country Link
US (1) US5531946A (fr)
EP (1) EP0602134B1 (fr)
JP (1) JPH06510246A (fr)
CA (1) CA2116969A1 (fr)
DE (2) DE4129466A1 (fr)
ES (1) ES2072155T3 (fr)
GR (1) GR3015865T3 (fr)
WO (1) WO1993004830A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129466A1 (de) * 1991-09-05 1993-03-11 Bold Joerg Verfahren zur herstellung von gipsfaserplatten nach einem halbtrockenverfahren
EP0695612A1 (fr) * 1994-06-28 1996-02-07 Raimund Rimmele Procédé et dispositif de traitement d'argile pour la fabrication de briques
CA2197696C (fr) * 1996-02-14 2001-05-15 Werner Froese Appareil pour fabriquer des panneaux d'agglomere derives du bois
DE19847814B4 (de) 1998-10-16 2007-10-18 Dieffenbacher Gmbh + Co. Kg Verfahren und Anlage zur Herstellung von Preßgutplatten
US6197235B1 (en) * 1999-02-09 2001-03-06 United States Gypsum Company Method of manufacture for textured surface panels and panel products made therefrom
WO2014207098A1 (fr) * 2013-06-26 2014-12-31 Knauf Gips Kg Procédé de fabrication d'une plaque de plâtre renforcée de fibres
EP3247542B1 (fr) * 2014-12-22 2021-02-03 Knauf Gips KG Procédé de production de plaques fibreuses de plâtre
DE102018218512B4 (de) * 2018-10-29 2021-11-11 James Hardie Europe Gmbh Verfahren und Vorrichtung zur Herstellung einer Gipsfaserplatte

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CH239713A (de) * 1942-06-18 1945-11-15 Algemeene Kunstvezel Mij Nv Verfahren und Vorrichtung zur Herstellung von plattenförmigen Isolierkörpern aus Glasfasern oder andern mineralischen Fasern.
DE1784657B2 (de) * 1968-09-02 1977-12-01 Ferma International Entwicklungswerk Fuer Rationelle Fertigbaumethoden Und Maschinenanlagen Gmbh & Co Kg, 7516 Karlsbad Verfahren zum kontinuierlichen Herstellen von Formkörpern, insbesondere von Platten, aus Gips und Fasern
DE2103931A1 (de) * 1968-09-02 1972-08-31 FERMA International Entwicklungswerk rationelle Fertigbaumethoden und Maschinen anlagen GmbH & Co KG, 7505 Etthngen Anlage zum kontinuierlichen Her steJJen von Formkorpern, insbesondere von Platten, aus Gips
BG18590A3 (fr) * 1971-01-28 1975-02-25
DE2751473C3 (de) * 1977-11-18 1981-07-23 G. Siempelkamp Gmbh & Co, 4150 Krefeld Anlage zur kontinuierlichen Herstellung von Platten aus Faserwerkstoff und Gips
DE2751466B2 (de) * 1977-11-18 1980-07-03 G. Siempelkamp Gmbh & Co, 4150 Krefeld Verfahren zur Hersteilung von Platten aus Faserwerkstoff und Gips
DE3439493A1 (de) * 1984-10-27 1986-05-07 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
EP0153588B2 (fr) * 1984-02-10 1994-04-20 BABCOCK-BSH AKTIENGESELLSCHAFT vormals Büttner-Schilde-Haas AG 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
DE3626048A1 (de) * 1986-08-01 1988-02-11 Bayer Ag Verstaerkte gipsplatten
DE3801315C2 (de) * 1988-01-19 1994-05-26 Babcock Bsh Ag Anlage zur Herstellung von plattenförmigen Körpern aus einer Mischung von Gips und Faserstoff
DE3906009C1 (fr) * 1989-02-26 1990-09-06 Wuertex Maschinenbau Hofmann Gmbh & Co, 7336 Uhingen, De
DE3928626C1 (fr) * 1989-08-30 1991-01-24 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
DE4009883A1 (de) * 1990-03-28 1991-10-02 Siempelkamp Gmbh & Co Anlage fuer die herstellung von spanplatten, faserplatten und aehnlichen pressgutplatten
DE4025797C2 (de) * 1990-08-15 1994-10-06 Babcock Bsh Ag Verfahren zur Herstellung von plattenförmigen Körpern aus einer Mischung von Gips und Faserstoffen sowie Anlage zur Durchführung dieses Verfahrens
US5342566A (en) * 1990-08-23 1994-08-30 Carl Schenck Ag Method of manufacturing fiber gypsum board
DE4129466A1 (de) * 1991-09-05 1993-03-11 Bold Joerg Verfahren zur herstellung von gipsfaserplatten nach einem halbtrockenverfahren

Also Published As

Publication number Publication date
CA2116969A1 (fr) 1993-03-18
WO1993004830A1 (fr) 1993-03-18
ES2072155T3 (es) 1995-07-01
GR3015865T3 (en) 1995-07-31
DE4129466A1 (de) 1993-03-11
EP0602134A1 (fr) 1994-06-22
US5531946A (en) 1996-07-02
DE59201425D1 (de) 1995-03-23
JPH06510246A (ja) 1994-11-17

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