EP0263919A2 - Dispositif pour la fabrication en continu de plaques en matière minérale, en particulier de plaques de plâtre renforcées de fibres, à partir d'une suspension - Google Patents
Dispositif pour la fabrication en continu de plaques en matière minérale, en particulier de plaques de plâtre renforcées de fibres, à partir d'une suspension Download PDFInfo
- Publication number
- EP0263919A2 EP0263919A2 EP87108461A EP87108461A EP0263919A2 EP 0263919 A2 EP0263919 A2 EP 0263919A2 EP 87108461 A EP87108461 A EP 87108461A EP 87108461 A EP87108461 A EP 87108461A EP 0263919 A2 EP0263919 A2 EP 0263919A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- inlet
- suspension
- suction box
- panels
- conveyor belt
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- 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
-
- 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
Definitions
- the invention relates to a device for the continuous molding of mineral slabs, in particular gypsum fiber slabs, from a suspension according to the preamble of patent claim 1.
- DE-OS 33 16 946 a molding station is described, which consists of a lower circulating belt, on which the slurry is applied, and an upper circulating belt. Both belts are supported between deflection rollers on the side facing one another with supporting devices in such a way that a calibration or press gap corresponding to the desired plate thickness is produced between the two belts.
- Support devices described in more detail have rectilinear, parallel contact surfaces, the press nip widens in a wedge shape on the inlet side.
- This generic device is for the formation of plates from a suspension with considerable excess amounts of water - z.
- Such a high proportion of water in the starting mixture is in the production of gypsum fiber boards from calcium sulfate dihydrate and fiber material - for.
- the shaped plates are then dehydrated in an autoclave, the dihydrate becoming hemihydrate, and set to the required strength in the subsequent rehydration.
- Such a process for the production of gypsum fiber boards is described in DE-OS 34 19 558.
- the forming and dewatering station consists of a suction belt filter with a downstream belt press.
- the invention has for its object to provide a generic molding device with which plates from a suspension of minerals and water, in particular calcium sulfate dihydrate and water, optionally with additional fiber material continuously drain to a certain water content and at the same time to dimensions within Have the tolerances required by the construction industry shaped.
- the feature of claim 2 enables a variation of the wedge formed by the two support elements depending on the desired plate thickness and the drainage behavior of the suspension, so that the plate formed in the wedge is continuously compressed.
- a plug forms in the limited liquid space in the wedge due to the outflow of water.
- the suspension flows into the wedge due to the hydrostatic pressure.
- the cavities created by the suction are filled in, as a result of which the shaped plates have a very uniform density.
- the stirring device according to claim 6 prevents segregation of the gypsum fiber suspension when it is stored.
- Claim 7 contains an advantageous embodiment of a suspension container with a stirring device.
- Figure 1 shows a longitudinal section through a molding station according to the invention for the production of gypsum fiber boards from calcium sulfate dihydrate and waste paper fibers.
- the molding station is made up of two molding steps 1, 2 arranged one behind the other in the transport direction, with a common base frame 3.
- Each form step 1, 2 has a lower, circulating conveyor belt 4, 5, the upper conveying strand of which is supported on the inside by a support element which is fixedly mounted in the frame 3 and extends horizontally.
- the support element of the first mold stage 1 consists of two rollers 6.1, 6.2, which are mounted at a distance from one another transversely to the transport direction, between which an evacuable suction box 7 is fastened.
- the flat, perforated table surface of the suction box 7, over which the belt 4 slides, is flush with the upper circumference of the rollers 6.
- the support element of the second mold stage 2 is constructed analogously, with the difference that instead of a suction box between the rollers 8.1, 8.2 there is a pressure box 9 with transverse slots.
- Both belts 4, 5 are returned via deflection rollers 10 in the lower part of the base frame 3. Their upper, horizontal runs are each extended on the inlet side to a deflection roller 11, 12.
- Each form step 1, 2 has an upper, circulating conveyor belt 13, 14, the lower run of which is supported on the inside in each case above the lower support elements by height-adjustable support elements.
- the supported sections of the lower and upper belts 4, 13 and 5, 14 each form a shaped wedge in which the plates are formed.
- the upper support element of the first molding stage 1 consists of two rollers 16.1, 16.2, which are mounted horizontally transversely at a distance in a pressure frame 15, and a suction box 17 fastened to the pressure frame 15 and supported on the upper side thereof between the two rollers 16.1, 16.2.
- the lower surface of the suction box 17, which supports the belt 13, is aligned with the lower circumference of the rollers 16.1, 16.2.
- the print frame 15 is articulated on the inlet and outlet sides above the rollers 16.1, 16.2 on vertical spindles 18.1, 18.2 which are height-adjustable independently of one another, and eccentrically on the inlet side.
- the spindles are supported on the horizontal supports of the frame 3 at the top.
- the upper support element of the second form stage 2 is constructed analogously. As with the lower support element, a pressure box 20 provided with transverse slots is fastened between the rollers 19.1, 19.2 instead of a suction box. The pressure box 20 is also fastened to a pressure frame 22 articulated on spindles 21.1, 21.2 and is thus supported in the frame 3.
- Polyester belts with openings are used as conveyor belts, the width of which corresponds to the plates to be formed; usually between 600 and 2,800 mm.
- the belts 5, 14 of the second forming stage 2 have finer openings, so that smooth surfaces can be achieved in the finished plates without post-treatment.
- Each conveyor belt 4, 5, 13, 14 passes through a cleaning device 23 during the return.
- pressure strips are arranged along the conveyor path, which form the plates on their long sides.
- a roller table 24 connects to the second mold stage.
- the suction boxes 7, 17 are coated on the supporting surface with a plastic with a low coefficient of friction, and the supporting surface the pressure boxes 9, 16 are formed by transverse strips made of glass fiber reinforced polyethylene.
- a feed device 25 for the suspension is arranged above the part of the lower conveyor belt 4 of the first molding stage 1 which is extended on the inlet side.
- the feed device 25 consists of a trough-shaped, Suspension container 26 extending across the belt 4 with a suspension inlet 27.
- the container 26 has an outlet connection 28, which also extends over the entire range, the upper limit 28.1 of which extends to the upper roller 16.1 of the forming stage 1.
- the lower limit 28.2 of the nozzle 28 extends to the lower suction box 7.
- a stirring device 29 consisting of a rotatingly driven cage in the form of a horizontal cylinder, which is equipped on its outer surface with axially parallel stirring rods 30. Furthermore, a level probe 31 is located in the suspension container 26, and a compressed air line 32 is connected to its upper part.
- the operation of the device when used to form gypsum fiber boards from a suspension with about 300 percent by weight of water (based on the solid) is described below, the solid being about 90 percent by weight of calcium sulfate dihydrate and about 10 percent by weight of fibers consists. Waste paper fibers are used as fiber material, the addition of other organic or inorganic fibers or wood chips is also possible.
- the device according to the invention for forming plates from minerals other than gypsum, such as. B. cement or lime can be used.
- the upper rollers 16.1, 19.1 on the inlet side are fixed at a somewhat greater distance from the table surface of the lower support elements than the rollers 16.2, 19.2 on the outlet side.
- a wedge is thus formed between the conveyor belts 4, 13 and 5, 14, respectively which the plates are shaped.
- the angle of inclination of the upper mold surface is adapted to the loss of volume as a result of the drainage so that an increasing pressure builds up against the support elements along each molding section. In the present example, the angle of inclination is 0.5 - 1 °. With the height adjustment via the spindles 18 and 21, it can be adapted to the respective requirements.
- the feed device 25 is charged with the gypsum fiber suspension via the inlet 27.
- the stirring device 28 prevents the suspension in the container 26 from segregating and thus ensures a uniform plate density and an even distribution of the fibers in the plate.
- the suspension runs continuously through the nozzle 28 to the first molding stage 1, where water is continuously drawn off via the upper and lower suction boxes 7 and 17, respectively. Suction from both the top and bottom prevents the raw materials from segregating.
- the solidifying cake is pulled by the conveyor belts 4, 13 through the wedge formed by the support elements, compacted and dewatered to about 35% residual moisture.
- Two conveyor belts 4, 13 and 5, 14 arranged one above the other run synchronously.
- the molding sections are so long that the boards are kept under pressure for at least 0.5 minutes; in the present embodiment, the molding distance is approximately 800 mm in each case.
- the plates formed in the first stage 1 are then pressed further in the second stage 2 and calibrated to the desired plate thickness.
- the water content is reduced to 25-30% residual moisture.
- the water squeezed out of the plates flows through the transverse slots of the pressure boxes 9, 20.
- the molded wedge between the pressure boxes 9, 20 is adapted to the reduced volume shrinkage in the second stage 2, the upper support element is therefore slightly less inclined to the horizontal than in the first stage 1.
- the finished molded plates are further processed via a roller conveyor 24 or transported to a camp.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Producing Shaped Articles From Materials (AREA)
- Laminated Bodies (AREA)
- Paper (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87108461T ATE71870T1 (de) | 1986-10-10 | 1987-06-11 | Vorrichtung zum kontinuierlichen formen von mineralstoffplatten, insbesondere von gipsfaserplatten, aus einer suspension. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3634604 | 1986-10-10 | ||
| DE3634604A DE3634604C2 (de) | 1986-10-10 | 1986-10-10 | Vorrichtung zum kontinuierlichen Formen von Mineralstoffplatten, insbesondere von Gipsfaserplatten, aus einer Suspension |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0263919A2 true EP0263919A2 (fr) | 1988-04-20 |
| EP0263919A3 EP0263919A3 (en) | 1990-01-17 |
| EP0263919B1 EP0263919B1 (fr) | 1992-01-22 |
Family
ID=6311500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87108461A Expired - Lifetime EP0263919B1 (fr) | 1986-10-10 | 1987-06-11 | Dispositif pour la fabrication en continu de plaques en matière minérale, en particulier de plaques de plâtre renforcées de fibres, à partir d'une suspension |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0263919B1 (fr) |
| AT (1) | ATE71870T1 (fr) |
| DE (2) | DE3634604C2 (fr) |
| ES (1) | ES2029458T3 (fr) |
| GR (1) | GR3004179T3 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3903641A1 (de) * | 1989-02-08 | 1990-08-09 | Fulgurit Baustoffe Gmbh | Verfahren zur herstellung von gipsfaserplatten |
| DE19824604C2 (de) * | 1998-06-02 | 2003-02-27 | Frank Reintjes | Vorrichtung zur Herstellung von Bauplatten |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE511420A (fr) * | ||||
| CH61865A (de) * | 1912-08-22 | 1913-10-16 | Adalbert Hermann | Verfahren und Einrichtung zur Herstellung von Kunststeinformlingen |
| US2097613A (en) * | 1931-07-28 | 1937-11-02 | Bemis Ind Inc | Process and apparatus for making and coloring cement fiber and the like products |
| AT137527B (de) * | 1932-12-28 | 1934-05-11 | Gustav Ing Ostersetzer | Verfahren und Vorrichtung zur Herstellung von Platten aus faserstoffhaltigen Massen. |
| FR60603E (fr) * | 1948-08-20 | 1954-11-22 | Eternit Sa | Perfectionnements apportés aux moyens pour la fabrication de plaques et tuyaux en agglomérats composés de substances fibreuses et liantes, notamment en amiante-ciment |
| FR1421378A (fr) * | 1964-09-18 | 1965-12-17 | Cie D Applic Mecaniques A L El | Dispositif automatique perfectionné pour la projection de films |
| DE2149052A1 (de) * | 1971-10-01 | 1973-04-05 | Flessner Kg | Horizontale bandpresse zum entwaessern von feststoffen |
| DE2224293A1 (de) * | 1972-05-18 | 1973-12-06 | Rupert Burgmair | Vorrichtung zum intensiven vermischen von spez. verschieden schweren guetern mit fluessigkeiten |
| US3809566A (en) * | 1972-05-26 | 1974-05-07 | O Revord | Gypsum-based building product and method of producing same |
| DE2365161A1 (de) * | 1973-12-29 | 1975-07-03 | Heidelberg Portland Zement | Verfahren zur herstellung von gipsfaserplatten sowie vorrichtung zur durchfuehrung des verfahrens |
| JPS54125709A (en) * | 1978-01-31 | 1979-09-29 | Fuji Mfg Co Ltd | Apparatus for producing fiberboard |
| AT348325B (de) * | 1977-02-14 | 1979-02-12 | Andritz Ag Maschf | Presspartie fuer entwaesserungsmaschinen |
| DE2717719C3 (de) * | 1977-04-21 | 1981-02-19 | G. Siempelkamp Gmbh & Co, 4150 Krefeld | Vorrichtung zum Pressen von grünen Asbestzementplatten |
| CH641085A5 (de) * | 1979-10-08 | 1984-02-15 | Bell Ag Maschf | Maschine zur herstellung von bauplatten. |
| DE3316946C2 (de) * | 1983-05-09 | 1986-07-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Einrichtung zum kontinuierlichen Herstellen von Werkstücken unter Verwendung exotherm erhärtender Bindemittel |
| DE3419558C2 (de) * | 1984-05-25 | 1987-03-05 | Babcock-BSH AG vormals Büttner-Schilde-Haas AG, 4150 Krefeld | Verfahren und Anlage zur Herstellung von Gipsfaserplatten |
-
1986
- 1986-10-10 DE DE3634604A patent/DE3634604C2/de not_active Expired - Fee Related
-
1987
- 1987-06-11 DE DE8787108461T patent/DE3776254D1/de not_active Expired - Lifetime
- 1987-06-11 EP EP87108461A patent/EP0263919B1/fr not_active Expired - Lifetime
- 1987-06-11 AT AT87108461T patent/ATE71870T1/de not_active IP Right Cessation
- 1987-06-11 ES ES198787108461T patent/ES2029458T3/es not_active Expired - Lifetime
-
1992
- 1992-03-27 GR GR920400548T patent/GR3004179T3/el unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ATE71870T1 (de) | 1992-02-15 |
| DE3634604C2 (de) | 1994-11-03 |
| EP0263919B1 (fr) | 1992-01-22 |
| ES2029458T3 (es) | 1992-08-16 |
| GR3004179T3 (fr) | 1993-03-31 |
| EP0263919A3 (en) | 1990-01-17 |
| DE3634604A1 (de) | 1988-04-14 |
| DE3776254D1 (de) | 1992-03-05 |
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