WO1994025234A1 - Processes and installations for the manufacture of products consisting of fibres and hydraulic binder - Google Patents
Processes and installations for the manufacture of products consisting of fibres and hydraulic binder Download PDFInfo
- Publication number
- WO1994025234A1 WO1994025234A1 PCT/AT1994/000051 AT9400051W WO9425234A1 WO 1994025234 A1 WO1994025234 A1 WO 1994025234A1 AT 9400051 W AT9400051 W AT 9400051W WO 9425234 A1 WO9425234 A1 WO 9425234A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- conveyor belt
- water
- earth
- roller
- Prior art date
Links
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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/30—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon
- B28B1/40—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by wrapping, e.g. winding
- B28B1/42—Producing shaped prefabricated articles from the material by applying the material on to a core or other moulding surface to form a layer thereon by wrapping, e.g. winding using mixtures containing fibres, e.g. for making sheets by slitting the wound layer
-
- 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
-
- 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 methods and systems for the production of products, in particular moldings, consisting of fibers and hydraulic binders, in particular cement.
- a mixture of a fiber phase and a binder and, in particular, aggregate phase is produced in the process and this mixture is applied in an air transport process to an air- and possibly water-permeable circulating transport belt to form a layer, the layer being subjected to a compaction process while it remains on the transport belt. and is subjected to an irrigation process.
- the equipment affected by the invention comprise at means for mixing a fiber phase and a binder and in particular award phase, a circulating air and optionally water permeable conveying belt, at least one device of the mixture f ' ⁇ r the feed in the air transport to the conveyor belt, at least one compression and optionally smoothing device and at least one irrigation device.
- HATSCHEK The most common process for manufacturing fiber cement components is the HATSCHEK process.
- a mixture consisting of a cement-bound matrix with inert or reactive fillers and of process and / or reinforcing fibers with a considerable excess of water is prepared and dewatered via one or more cylinder screens.
- the resulting nonwoven fabric is applied to a transport device, further dewatered by means of a vacuum and wound onto a rotating cylinder, namely a format roller, until the desired component thickness is reached.
- the flat, two-dimensional fiber alignment is an advantage here, as it almost exclusively pulls the fibers and thus makes optimal use of their properties.
- This process has a high process water requirement, which can only be reduced with great effort.
- strongly alkaline water is produced, which must be treated.
- the systems for circulating and cleaning the process water are sometimes very complex.
- the use of process fibers with a filter effect is essential. Despite these process fibers, a part is possible of the material through the sieve of the sieve cylinder and must be returned to the mixture, which results in longer residence times in the process water, which can lead to a reduction in the quality of the binder used.
- EP-PS 0 295 441 describes the compression of shaped bodies on a forming belt. It is about the continuous production of gypsum fiberboard as well as fiberboard and chipboard. Above all, a moistened mixture of gypsum and fibrous materials with the simultaneous addition of water to form the shaped body is sprinkled onto the forming belt by means of a multiple spreading head and then compacted thereon. The water is added in advance. There is therefore a high water consumption again.
- EP-PS 0 024 980 is concerned with the continuous pouring of a liquid gypsum-water mixture onto a belt; here the water requirement is extraordinarily high again.
- the present invention is based on a process for the production of products consisting of fibers and hydraulic binder, in particular shaped articles, in which a mixture is produced from a fiber phase and a binder and in particular aggregate phase, and this mixture is air-transported in an air transport process - And optionally water-permeable circulating conveyor belt is applied to form a layer.
- the aim of the invention is primarily in such a method not only to reduce the process water requirement, but also to avoid the disadvantages of introducing the mixture into the dry state, such as disturbing the environment and segregating before the actual application of the mixture.
- perfect fiber-binder products, in particular cement products, preferably molded articles are to be produced.
- a method and a system are therefore proposed according to the invention, in which the material mixture, consisting of the above-mentioned raw materials, is expediently applied to an earth-moist mass, in particular with a content of 5 to 20, before application to the conveyor belt, 8-12 % Of water, based on the total mass of the mixture, processed, and this earth-moist mass sprinkled directly onto the moving conveyor belt by means of the air transport method known per se to form a layer, and this earth-moist layer scattered after the sprinkling area during its movement with the conveyor belt, as is known per se , compressed and optionally smoothed, and additional water on this layer after or during its compression and optionally smoothing, at least in the amount required for the manufacture of the product, in particular for hydration or setting, in particular up to a total water content of 15 to 50%, expediently 30-45%, based on the total mass of the layer, and after the additional water has been applied, the layer is wound up in several layers on a winding or format roller.
- the mixture in the process or in the system according to the above-mentioned US Pat. No. 4,233,368 is applied as a dry mixture to a moving surface for the purpose of forming the plate, whereupon the total amount of setting water is reached until a plastic one is reached Consistency supplied, the plate is formed by applying pressure and this plate is then dried.
- An earth-moist starting mixture is not specified. It is consequently not suggested in this prior publication that an earth-moist mixture should be applied directly to the tape, i.e. not to a plastic pre-layer (film) already present on the tape, as is the case with the known methods in which a plate is used or a layer of fiber cement is sprinkled on a top layer.
- the production of the material web is particularly advantageous in practice if, according to the invention, either the additional water in the compaction or smoothing area is fed via the inside of a compaction or smoothing roller to the layer formed from a mass scattered from the earth, this roller directly feeding it Contacted layer or the additional water, in particular between compression and winding of the layer, as known per se, is applied in the form of water vapor to the layer formed from a mass scattered with earth moisture after or during its compaction.
- the structure of the material web can thus be controlled well.
- the path of a secured chemical reaction can be followed in that the additional amount of water required for hydration or setting Amount of water exceeding the amount of water applied to the layer formed from an earth-moist scattered mass and, during the compression and / or winding up, water pressed out as water additive to form the scatterable earth-moist mass is used again, in particular recycled.
- Multi-layer products in particular boards, or sandwich boards or the like.
- the surface of the products can be designed in any way by sprinkling a pigment cover layer on the compacted and irrigated layer (s) sprinkled as earth-moist mass before being wound up in several layers on the format roller, preferably followed by separate watering of the pigment layer before winding.
- a plant for the production of products consisting of fibers and hydraulic binders, in particular cement, in particular moldings contains a device for mixing a fiber phase and a binder and, in particular, aggregate phase, an all-round air and optionally water-permeable conveyor belt, at least a device for supplying the mixture in air transport to the conveyor belt, at least one compression and optionally smoothing device and at least one irrigation device for carrying out the method according to the invention primarily characterized in that the mixing device connected to a water inflow with devices for forming a scatterable, earth-moist mixture from the Fiber phase, binder and optionally aggregate phase and water is provided that the mixture feed device, as known per se, a scattering device with air Transport to sprinkle the earth-moist mixture directly on the conveyor belt and that the at least one irrigation device downstream of the scattering device for applying the additional water to the formed, earth-moist sprinkled layer formed at least in an amount required for the manufacture of the product, in particular the hydration or for setting,
- the mixer for forming the scatterable earth-moist mixture has a liquid addition device (line) for metering in liquid during the mixing process.
- the leveling and compacting of the layer applied to the conveyor belt can be made particularly favorable if the compacting and optionally smoothing device, as known per se, consists of a roller arranged above the conveyor belt and acting directly on the layer of earth-moistened soil, in particular with a smooth jacket, and there is a counter-holding element provided below the conveyor belt, in particular impermeable.
- the compaction or smoothing process can be optimized in that the compaction and optionally smoothing device, as known per se, has a driven circulating belt, preferably with a smooth surface, which runs above and at an angle to the surface of the earth-moist layer the strand facing the conveyor belt moves in the direction of movement of the conveyor belt and this strand and the conveyor belt enclose an angle that decreases in the direction of movement.
- the compaction effect can be enhanced or improved by the fact that, as is known per se, the counter-holding element for compaction of the earth-moist layer is a circulating belt, preferably driven synchronously with the air-permeable conveyor belt, suitably provided with a smooth surface.
- a favorable compression effect can also be achieved if the counter-holding element is a plate which is preferably coated to reduce friction.
- the smoothing of the material can additionally be advantageously designed in that on the discharge side of the compression or Smoothing device for the sprinkled earth-moist mixture, in particular a smoothing roller, is arranged, for example, a wiping element contacting it or arranged at a short distance therefrom, in particular a doctor blade.
- At least one irrigation device preferably, as is known per se, can be arranged transversely to the direction of movement of the Conveyor belt running spray tube, in the region of the compression and optionally smoothing device, preferably at least partially in the area that has started up from the scattered earth-moist layer.
- the irrigation device can therefore only be used for partial irrigation of the area of the compression or smoothing device that has started up from the scattered layer.
- the system according to the invention can also be constructed in such a way that the at least one irrigation device for dispensing water is arranged over the interior of the compression or smoothing device, in particular for dispensing water onto the run of a circulating belt attacking the layer that is scattered with the earth-moist layer.
- the water is added to the layer applied to the earth moist via a perforated smoothing roller, into the interior of which a water supply, which is at a standstill during operation of the system and leads through its storage, opens.
- At least one irrigation device for the layer which is applied to the conveyor belt in an earth-moist manner can preferably be provided between the compression device and the winding roller, a spray tube running transversely to the direction of movement of the conveyor belt.
- a scattering device for sprinkling a pigment layer onto the layer applied to the earth-moist on the conveyor belt can be provided between the compacting device and the winding roller, expediently an irrigation device for irrigating the pigment layer and the winding roller Pigment layer is provided.
- a further system according to the invention which is advantageous in practice is obtained if, in a manner known per se, at least one collector arranged below the conveyor belt with a settling tank for receiving accumulating and / or smoothing device and / or take-up roller from the earth-moist mass scattered on the conveyor belt Squeezed water and optionally washing liquid running off a belt washing device are provided, the water balance can be designed favorably if, according to the invention, the settling tank in the clear liquid area has a liquid discharge for supplying clear liquid as irrigation liquid to the irrigation device, and as washing liquid for the conveyor belt to one in the return area of the conveyor belt between one the counter roll to the winding roll forming breast roll and its sprinkling area arranged belt washing device. It can also be advantageous if, according to the invention, the settling tank in the sediment area has a return line for the metered return of a sediment / water mixture to the mixing device for the scatterable, earth-moist mass.
- Irrigation can also be carried out using water vapor instead of (liquid) water, in that according to the invention, as the spreading device and the compacting device and optionally the smoothing device, an irrigation device downstream of the known, earth-moist, sprinkled layer forms a water vapor supply known per se, e.g. a steam blow box is provided.
- FIG. 1 schematically shows the most important parts of the overall system with a processing or mixing container and two spreading devices
- FIG. 2 shows a component produced with it
- FIG. 3 shows a modified system with two processing or mixing containers and two spreading devices
- FIG. 7 a further embodiment of the invention with water supplied in the form of water vapor
- FIG. 8 a water supply via the interior of the compression or smoothing roller.
- the raw materials are mixed homogeneously in the mixer 1 using suitable devices and made earth-moist with water, in particular by water to a moisture content of 5-20%, preferably 8 - 12% based on the total mass.
- This mass is thrown onto an air-permeable conveyor belt 3 by means of a scattering device 2, this process taking place in the air transportation method.
- the material cake 4 thus formed moves on to the smoothing roller 5, which has the task of leveling or pre-compacting the material in order to level out any irregularities that may occur.
- the necessary back pressure is applied by the air-impermeable surface as a counter-holding element 6.
- the layer formed from an earth-moist scattered mass is thus compressed and, if necessary, smoothed by pressure application known per se immediately above and below the single conveyor belt so that the adhesive forces acting within the compacted layer are sufficient, which - as explained later - finally on the winding or format roller, if necessary, cut open a tube consisting of several layers, detach it from the roller and spread it out without separations between the individual layers or within the layers.
- the leveled and pre-compressed material layer 7 is further moistened with water by means of a suitable moistening device 8, so that a total water content of 15-50%, preferably 30-45%, based on the total mass, is obtained.
- This layer now arrives at the format roller 9, on which it is wound up in several layers, with further compression being brought about by the counter roller 10.
- This counter roller 10 also serves as the drive roller of the conveyor belt 3.
- the roll 11 is cut off from the format roller 9 and spread out evenly, this e.g. can be divided into smaller units by means of punching and three-dimensionally deformed or, if necessary, further compressed by pressing.
- the cleaning device 12 serves to remove any adhering material from the conveyor belt 3.
- a component with two cover layers and a middle layer is produced as follows:
- the spreading device 2 is in operation, which is synchronized with the format roller 9 in such a way that the length of the scattered layer corresponds to the circumference or a multiple of the circumference of the format roller 9. Then the spreading device 2 is switched off and the spreading device 14 is switched on, with which one or more layers are also spread.
- the lowermost component layer can in turn consist of material from the scattering device 2.
- This sandwich structure makes sense if the component thickness is to be more than 10 mm.
- the middle layer which is statically less stressed when loaded, can be formed either from cheaper raw materials or also partly from secondary raw materials, which brings about cost savings on the raw material side.
- any desired coloring of the component on the upper side can be achieved in that a further scattering device 15 applies a pigmented layer to the pre-compressed and moistened material layer
- the spreading device 15 is also synchronized with the format roller 9 in order to apply the ink layer precisely to the uppermost component layer.
- FIG. 2 A possible component structure produced in accordance with the type described above, consisting of a color layer a, (a) cover layer (s) b, (a) middle layer (s) c and (a) further cover layer (s) d, is shown in FIG. 2.
- the layer-by-layer structure of the component according to the invention differs from known scattering methods in which the material is applied to a transport device at one time and then compacted, as a result of which the component consists of only one layer and the reinforcing fibers are distributed three-dimensionally. Some of the fibers can therefore not absorb the tensile forces that occur under bending tensile loading, since they lie transversely to the direction of loading. In the single-layer production method, even and adequate moistening is very problematic when using cement as a binder.
- the method according to the invention ensures that all the raw materials used enter the component in the correct dosage, regardless of the geometric or other properties of these substances.
- the type and composition of the raw materials in the process according to the invention can be varied within very wide limits, since practically all types of fibrous to fine-grained materials can be applied by the scattering or distributing devices. Liquid additives can be added to the dampening water.
- two different spreadable mixtures from mixers 1 and 13 are fed to two separate spreading devices 2 and 14; These mixers 1, 13 are fed with a solid / liquid mixture from the settling tank 18 for processing at 1 'or 13' fibers, binders and additives and at 1 "or 13".
- the sprinkled material cake 4 is compressed by a smoothing roller 5, a non-driven endless belt 6 'being provided as a counter-holding element 6 against the deflection of the conveyor belt 3.
- the compressed material layer 7 is removed via a moistening device 8 in the form of a spray tube with clear liquid Process water settling tank 18 irrigated.
- a pigmented scattering composition - a so-called scattering layer - can be applied to the irrigated layer in a known manner by means of a roller spreader of a spreading device 15 and can be irrigated separately via a spray tube 16. Then the gap between the format roller 9 and the counter roller 10 is run up and the roll 11 drained there is wound up in layers on the format roller 9.
- a spray tube of a cleaning device 12 for washing the belt is provided; a belt dry suction is not shown since it is not required per se, especially since a certain water content on the conveyor belt 3 is aimed for.
- the squeezing liquid and the strip washing liquid running off on the counter roll 10 are collected in the collecting cup 17 and returned to the settling tank 18.
- Fresh water to the settling tank 18 is sent via line 19, clear liquid to the humidifying device 8, to the cleaning device 12 and to the spray tube 16 via lines 20, 20 ', 20 "and 20'” and the solid / liquid mixture from the settling area of the settling tank 18 of the treatment 1 and fed to mixer 13 via line 21.
- a liquid and gas permeable compressor endless sieve belt 22 is provided, the strand 22 'of the sprinkled material cake 4' at the beginning of the compression area is irrigated from the outside with the spray tube 8 ', clear liquid passing through to the material cake 4.
- the compressor endless belt 57 is an impermeable or a permeable belt; the compressed material layer 7 is watered here via the spray tube of the moistening device 8.
- a smooth compressor smoothing roller 5 is provided and the spray tube 8 "for moistening the sprinkled material cake 4 is against the starting gap between the material cake 4th and compressor smoothing roller 5 and directed against the run-up area of the compressor smoothing roller 5, solid particles adhering to the compressor smoothing roller 5 being washed off.
- Fig. 7 shows schematically a fleece moistening 8 '' by means of steam.
- a steam blow box 8 '' known from the paper industry can be considered.
- the surface or the jacket 5 'of the smoothing roller 5 expediently consists of a perforated plastic or steel layer in this embodiment.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Hydroponics (AREA)
- Laminated Bodies (AREA)
- Producing Shaped Articles From Materials (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT94913437T ATE157583T1 (en) | 1993-04-29 | 1994-04-28 | METHOD AND SYSTEMS FOR PRODUCING PRODUCTS MADE OF FIBERS AND HYDRAULIC BINDERS |
PL94311221A PL175123B1 (en) | 1993-04-29 | 1994-04-28 | Method of and apparatus for manufacturing products consisting of fibres and aqueous binder |
AU65597/94A AU6559794A (en) | 1993-04-29 | 1994-04-28 | Processes and installations for the manufacture of products consisting of fibres and hydraulic binder |
SK1215-95A SK121595A3 (en) | 1993-04-29 | 1994-04-28 | Process for the manufacture of products consisting of fibers and hydraulic binder and manufacturing device for their realization |
EP94913437A EP0725715B1 (en) | 1993-04-29 | 1994-04-28 | Processes and installations for the manufacture of products consisting of fibres and hydraulic binder |
DE59403989T DE59403989D1 (en) | 1993-04-29 | 1994-04-28 | METHOD AND PLANTS FOR PRODUCING PRODUCTS CONTAINING FIBERS AND HYDRAULIC BINDING AGENTS |
NO953702A NO302512B1 (en) | 1993-04-29 | 1995-09-20 | Process and installation for the manufacture of products with laminated base bodies, consisting of fibers and hydraulic binder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA835/93 | 1993-04-29 | ||
AT0083593A AT399308B (en) | 1993-04-29 | 1993-04-29 | METHOD AND PLANTS FOR PRODUCING PRODUCTS CONTAINING FIBERS AND HYDRAULIC BINDING AGENTS |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1994025234A1 true WO1994025234A1 (en) | 1994-11-10 |
WO1994025234B1 WO1994025234B1 (en) | 1994-12-22 |
Family
ID=3500882
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT1994/000051 WO1994025234A1 (en) | 1993-04-29 | 1994-04-28 | Processes and installations for the manufacture of products consisting of fibres and hydraulic binder |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0725715B1 (en) |
AT (2) | AT399308B (en) |
AU (1) | AU6559794A (en) |
CZ (1) | CZ232395A3 (en) |
DE (1) | DE59403989D1 (en) |
DK (1) | DK0725715T3 (en) |
ES (1) | ES2106528T3 (en) |
HU (1) | HUT74207A (en) |
NO (1) | NO302512B1 (en) |
PL (1) | PL175123B1 (en) |
SI (1) | SI9420019A (en) |
SK (1) | SK121595A3 (en) |
WO (1) | WO1994025234A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120231946A1 (en) * | 2009-11-30 | 2012-09-13 | Uni-Charm Corporation | Method for thinning aggregate of water-absorbent material and thin aggregate of water-absorbent material obtained using the method |
Citations (10)
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DE287395C (en) * | ||||
US2281591A (en) * | 1937-04-28 | 1942-05-05 | Johns Manville | Method of making composite sheets |
US3608261A (en) * | 1969-03-28 | 1971-09-28 | Johns Manville | Sheet covering members for building surfaces |
GB2018235A (en) * | 1978-04-04 | 1979-10-17 | Johns Manville | Treatment and recycle of asbestos cement slurry |
SU345745A1 (en) * | 1969-05-15 | 1981-03-30 | Научно-Исследовательский Институт Асбестоцементных Изделий | Method of making multilayer asbestos-cement articles |
DE3149804A1 (en) * | 1981-12-16 | 1983-07-21 | Gebr. Knauf Westdeutsche Gipswerke, 8715 Iphofen | Process for producing gypsum fibre board |
EP0116027A2 (en) * | 1983-02-03 | 1984-08-15 | N.V. Johns-Manville | Multi layered coating for article of asbestos-cement |
EP0168991A2 (en) * | 1984-07-06 | 1986-01-22 | Pilkington Brothers P.L.C. | Apparatus for making cement composite materials |
EP0260342A1 (en) * | 1986-09-19 | 1988-03-23 | Kronospan Anstalt | Method for making fibrous building elements such as panels, moulded elements or the like |
WO1993011085A1 (en) * | 1991-11-25 | 1993-06-10 | Carl Schenck Ag | Fiber gypsum board and method of manufacturing same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4233368A (en) * | 1978-06-05 | 1980-11-11 | United States Gypsum Company | Method for the production of glass fiber-reinforced gypsum sheets and gypsum board formed therefrom |
FR2463669A1 (en) * | 1979-08-21 | 1981-02-27 | Saint Gobain | SELF-CLEANING DEVICE FOR CASTING THE PLASTER |
FI69591C (en) * | 1983-02-09 | 1986-03-10 | Asko Sarja | OVER ANCHORING FOR COMPRESSION OF BETONG |
DE3719128A1 (en) * | 1987-06-06 | 1988-12-15 | Wuertex Maschinenbau Hofmann G | METHOD FOR THE CONTINUOUS PRODUCTION OF MOLDED BODIES, IN PARTICULAR PLATES AND DEVICE FOR IMPLEMENTING THE METHOD |
AT389841B (en) * | 1987-08-10 | 1990-02-12 | Eternit Werke Hatschek L | SYSTEM FOR THE PRODUCTION OF FIBER CEMENT PIPES |
-
1993
- 1993-04-29 AT AT0083593A patent/AT399308B/en not_active IP Right Cessation
-
1994
- 1994-04-28 DK DK94913437.3T patent/DK0725715T3/en not_active Application Discontinuation
- 1994-04-28 AU AU65597/94A patent/AU6559794A/en not_active Abandoned
- 1994-04-28 CZ CZ952323A patent/CZ232395A3/en unknown
- 1994-04-28 DE DE59403989T patent/DE59403989D1/en not_active Expired - Fee Related
- 1994-04-28 EP EP94913437A patent/EP0725715B1/en not_active Expired - Lifetime
- 1994-04-28 SI SI9420019A patent/SI9420019A/en unknown
- 1994-04-28 HU HU9503091A patent/HUT74207A/en unknown
- 1994-04-28 WO PCT/AT1994/000051 patent/WO1994025234A1/en active IP Right Grant
- 1994-04-28 PL PL94311221A patent/PL175123B1/en unknown
- 1994-04-28 SK SK1215-95A patent/SK121595A3/en unknown
- 1994-04-28 AT AT94913437T patent/ATE157583T1/en not_active IP Right Cessation
- 1994-04-28 ES ES94913437T patent/ES2106528T3/en not_active Expired - Lifetime
-
1995
- 1995-09-20 NO NO953702A patent/NO302512B1/en unknown
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US3608261A (en) * | 1969-03-28 | 1971-09-28 | Johns Manville | Sheet covering members for building surfaces |
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EP0116027A2 (en) * | 1983-02-03 | 1984-08-15 | N.V. Johns-Manville | Multi layered coating for article of asbestos-cement |
EP0168991A2 (en) * | 1984-07-06 | 1986-01-22 | Pilkington Brothers P.L.C. | Apparatus for making cement composite materials |
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Title |
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SOVIET PATENTS ABSTRACTS Week 8126, 5 August 1981 Derwent World Patents Index; AN 47073 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120231946A1 (en) * | 2009-11-30 | 2012-09-13 | Uni-Charm Corporation | Method for thinning aggregate of water-absorbent material and thin aggregate of water-absorbent material obtained using the method |
Also Published As
Publication number | Publication date |
---|---|
PL175123B1 (en) | 1998-11-30 |
EP0725715B1 (en) | 1997-09-03 |
HUT74207A (en) | 1996-11-28 |
NO953702D0 (en) | 1995-09-20 |
HU9503091D0 (en) | 1995-12-28 |
AU6559794A (en) | 1994-11-21 |
PL311221A1 (en) | 1996-02-05 |
SI9420019A (en) | 1995-12-31 |
AT399308B (en) | 1995-04-25 |
NO302512B1 (en) | 1998-03-16 |
NO953702L (en) | 1995-11-30 |
ATA83593A (en) | 1994-09-15 |
CZ232395A3 (en) | 1996-02-14 |
ATE157583T1 (en) | 1997-09-15 |
ES2106528T3 (en) | 1997-11-01 |
DK0725715T3 (en) | 1998-03-23 |
EP0725715A1 (en) | 1996-08-14 |
DE59403989D1 (en) | 1997-10-09 |
SK121595A3 (en) | 1996-01-10 |
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