EP0448657A1 - Flat-extrusion process for the production of wood products bonded with inorganic or organic binders, in particular laminated panels. - Google Patents
Flat-extrusion process for the production of wood products bonded with inorganic or organic binders, in particular laminated panels.Info
- Publication number
- EP0448657A1 EP0448657A1 EP90913063A EP90913063A EP0448657A1 EP 0448657 A1 EP0448657 A1 EP 0448657A1 EP 90913063 A EP90913063 A EP 90913063A EP 90913063 A EP90913063 A EP 90913063A EP 0448657 A1 EP0448657 A1 EP 0448657A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- press belts
- belts
- shaft
- section
- 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
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000001125 extrusion Methods 0.000 title claims abstract description 5
- 239000002023 wood Substances 0.000 title claims description 10
- 239000011230 binding agent Substances 0.000 title description 9
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000003892 spreading Methods 0.000 claims abstract description 12
- 230000007480 spreading Effects 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000010924 continuous production Methods 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims 2
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000013590 bulk material Substances 0.000 claims 1
- 239000004745 nonwoven fabric Substances 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract 2
- 230000036571 hydration Effects 0.000 description 24
- 238000006703 hydration reaction Methods 0.000 description 24
- 238000003825 pressing Methods 0.000 description 8
- 238000005452 bending Methods 0.000 description 3
- 239000011093 chipboard Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000035899 viability Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
- B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
- B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
-
- 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
Definitions
- the invention relates to a method for producing organically or organically bound wood-based materials and to a device for carrying it out.
- the hydration begins with the addition of the hydration water.
- the start of hydration and the entire hydration time are designed approximately in such a way that the total hydration time is three times as long as the time until the start of stiffening. It follows that a faster onset of hydration also means a shorter hydration period.
- the length of a holding unit required to maintain the dimensions of the setting plates, ie a calibration press therefore results from the total hydration duration and is directly related to the start of hydration. The earlier the start of hydration can begin, the shorter the calibration press can be executed, or the higher the feed rate can be selected.
- extrusion processes are also known in which the pressing pressure is exerted parallel to the board level in such a way that the wood chips are pressed continuously through a heated train or channel with a rectangular or differently shaped cross-section and the wood chip board is thereby produced.
- This process is a so-called Okal process.
- the chips are metered into a vertical press channel and compacted by a cyclically working stamp.
- the chips compacted in this way pass through a heated molding channel, the length of which is determined such that the chips are glued sufficiently well.
- the pressing times are relatively short, i because of the heat development the chips are glued together on the surface. The strength achieved in this way means that the setting process need not proceed to the middle of the plate.
- the amount of heat accumulating on the surface of the plate is sufficient to cause the plate to bond to the plate core after leaving the press.
- an additional device a stamp must be used, that the friction between the lining of the channel and the fleece sometimes reaches higher values than desired and the chip orientation of the process plates runs perpendicular to the plane of the plate, which results in low bending strength of the plates produced. This is very disadvantageous.
- the object of the invention is to design a generic method and the device required to carry out the method in such a way that the system can be made very compact and short while at the same time achieving high bending strength of the plates produced.
- hydration can be used simultaneously for all shifts.
- inorganic binders in particular gypsum
- hydration begins with the addition of the water of hydration. If the hydration starts quickly after the addition of all the necessary batches, for example when producing multilayer plates of various constituents, it is also completed more quickly.
- the subsequent calibration press can be made much shorter or the feed rate can be selected higher.
- the economic viability of such a process is very high.
- the high flexural strength of the chipboard produced is achieved in that the nonwoven is compressed over the plane of the board. Due to the conical design of the shaft formed by the rotating press belts, the fleece is compacted in the vertical section of the shaft. The compression is essential for chip orientation.
- the chips / fibers can be pre-oriented by pre-compaction in the plate plane. The greater the degree of cohesion of the batch and the smaller the drop height, the better the orientation is maintained.
- the subsequent compression over the plate level substantially supports the alignment of the chips in the plate level, since the individual chips try to oppose the least resistance to the pressing pressure.
- This chip orientation achieves a high bending strength at right angles to the plate level.
- a section adjoins the conically tapering shaft section in which the press belts run parallel to one another and are at a distance from one another which corresponds to the thickness of the finished plate strand.
- the fleece is cured in the subsequent calibration press.
- a further embodiment of the device according to the invention is also possible such that the press belts run parallel to one another in a first section and have a conical course to one another in a second section. This embodiment has the advantage that the angle adjustment of the press belts is much easier to carry out when the second section is guided horizontally.
- multilayer plates can be produced. This is done by simultaneously adding different or the same components in the vertical shaft. Equalization of the fleece supports the favorable span orientation in the finished plate.
- the angle of inclination and the distance of the press belts from one another are variable.
- the press belts can be equipped with heat supply or heat removal devices.
- the cooling of the press belts makes sense if the solubility of dihydrate to water is to be increased during the process.
- press plates instead of press belts. This is especially the case if the press belts, because of their length and accuracy of execution, would be too expensive for a given system.
- An alternating feed of the press belts or the press plates supports the pulling behavior of the fleece into the press.
- the batch can be sprinkled directly onto the press belts and not into the shaft.
- a coating e.g. Film
- the device can be designed such that when the system starts up, a lowerable punch is inserted into the shaft (the shaft only runs vertically) in order to prevent the batch from falling through. With increasing plate strengthening, this stamp can be completely lowered.
- Figure 1 is a schematic representation of the device according to the invention, the batches being scattered directly into the press shaft.
- Figure 2 is a schematic representation of the device according to the invention with scattering of the batch on the press belts.
- Figure 3 is a schematic representation of the chip / fiber orientation during the pressing process and in the finished plate.
- the device according to the invention consists of mixing and spreading devices 1, a compression unit 2 and a calibration unit 3.
- the intensive mixers 4 and 5 the mixture of wood chips and binders for the cover layers is produced, in the intensive mixer 6 for the middle layer.
- the scattering stations 7, 8, 9 have the task of forming a uniform chip fleece on the subsequent discharge belts 10, 11, 12.
- the fleece formed is sprinkled into the conical shaft formed by the circumferential press belts 13 and 14, the respective layers being formed by the position of the discharge belts 10, 11, 12 (the arrows indicate the direction of movement of the discharge belts) .
- the circumferential press belts 13 and 14, which are arranged around the rollers 15, also have support rollers 16.
- the length of the vertical section A of the conical shaft B can be dimensioned such that the deflection and thus the beginning of the parallel course of the press belts 13 and 14 begins with the start of stiffening.
- the batch entered into the conical shaft is deflected by the circulating, endless press belts 13 and 14 during transport.
- the binder is hydrated in the subsequent calibration press 3.
- the separation between the compression and calibration press shown in this example is not absolutely necessary. These two presses can be enclosed by a single band.
- the mixing and discharge device 1 can also consist of a mixer, e.g. Mixer 8 and only one discharge belt, e.g. Drop belt 11, which oscillates around the center line of the shaft, exists.
- a mixer e.g. Mixer 8
- only one discharge belt e.g. Drop belt 11, which oscillates around the center line of the shaft, exists.
- FIG. 2 shows another variant of the device according to the invention, in which the press belts 14 and 13 in their upper region, which is connected to the spreading and mixing station 1, are guided over two rollers 15, so that they have a surface for the spreading of the Form fleece.
- This construction is particularly suitable for the production of multi-layered plates, in particular if a discharge belt 17 is additionally provided, by means of which a third component of the batch, which is strewn into the center of the shaft B, can be input.
- the system is only started up when the vertical shaft is filled.
- the press belts or press plates stand still until the shaft is filled.
- the advantage of the method according to the invention is that the parallel arrangement of the mixing and scattering units 1 enables binders to be processed with very short hydration times, so that the overall length of a calibration press 3 can be considerably reduced.
- An example is an estimate of the required length of a calibration line at a press belt speed of 5 m / min. 70 seconds are estimated for the mixing and spreading process.
- the calibration press should therefore be at a feed rate of 5 m per min be about 22m.
- the length of which is approximately 50 m, this means a considerable reduction in the overall length with the same capacity.
- the economic viability of such a system is considerable.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
On présente un procédé d'extrusion à plat servant à fabriquer en particulier des panneaux stratifiés et une installation pour samise en oeuvre. Le procédé se compose des étapes suivantes: introduction simultanée des mélanges par des dispositifs de mélange et d'épandage (1) dans un conduit vertical conique (A, B) formé de bbandes de pression en mouvement (13, 14); compactage du mélange sous l'action de la forme conique du conduit (B) puis passage dans une section (C) où les bandes de pression sont disposées parallèlement et présentent un écartement qui correspond à l'épaisseur du panneau extrudé fini; durcissement du mélange dans la section de calibrage (3) qui suit. L'installation pour la mise en oeuvre du procédé est présentée également.We present a flat extrusion process used in particular to manufacture laminate panels and an installation for its implementation. The process consists of the following stages: simultaneous introduction of the mixtures by mixing and spreading devices (1) in a conical vertical duct (A, B) formed by moving pressure bands (13, 14); compacting the mixture under the action of the conical shape of the conduit (B) then passing into a section (C) where the pressure bands are arranged in parallel and have a spacing which corresponds to the thickness of the finished extruded panel; hardening of the mixture in the following calibration section (3). The installation for implementing the method is also presented.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90913063T ATE102538T1 (en) | 1989-09-15 | 1990-09-15 | FLAT EXTRUSION PROCESS FOR THE MANUFACTURE OF INORGANIC OR ORGANIC WOOD MATERIALS, ESPECIALLY MULTI-LAYER BOARDS. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3930840A DE3930840A1 (en) | 1989-09-15 | 1989-09-15 | FLAT-EXTRUDING METHOD FOR THE PRODUCTION OF INORGANICALLY OR ORGANICALLY BONDED WOOD MATERIALS, IN PARTICULAR. MULTI-LAYERED PANELS |
DE3930840 | 1989-09-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0448657A1 true EP0448657A1 (en) | 1991-10-02 |
EP0448657B1 EP0448657B1 (en) | 1994-03-09 |
Family
ID=6389504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90913063A Expired - Lifetime EP0448657B1 (en) | 1989-09-15 | 1990-09-15 | Flat-extrusion process for the production of wood products bonded with inorganic or organic binders, in particular laminated panels |
Country Status (5)
Country | Link |
---|---|
US (1) | US5185115A (en) |
EP (1) | EP0448657B1 (en) |
CA (1) | CA2042058A1 (en) |
DE (1) | DE3930840A1 (en) |
WO (1) | WO1991004142A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE468278B (en) * | 1989-11-21 | 1992-12-07 | Curt Andersson | SETTING AND DEVICE MAKING A COMPRESSABLE MATERIAL MIX BY MEANS OF A NOZZLE AND A FORMATING MOVABLE MATERIAL MAKING A LONG STRENGTH |
US5372493A (en) * | 1993-05-13 | 1994-12-13 | Rodgers; Gary C. | Continuous casting apparatus using two moving belts |
US5484641A (en) * | 1993-11-01 | 1996-01-16 | Rotter; Martin J. | Process for fixing plastic reinforcing pins into non-woven filamentary material and product produced by the process |
JPH0879626A (en) * | 1994-09-05 | 1996-03-22 | Sony Corp | Video device |
DE4443763A1 (en) * | 1994-12-08 | 1996-06-13 | Hymmen Theodor Gmbh | Continuously operating press for the production of wood-based panels |
FR2733932B1 (en) * | 1995-05-11 | 1999-01-22 | Stihl Maschf Andreas | ENGINE CHAIN CHAINSAW EQUIPPED WITH A CHAIN BRAKING DEVICE |
JP2968470B2 (en) * | 1996-02-15 | 1999-10-25 | 三木特種製紙株式会社 | Apparatus and method for continuous production of plate-like products |
DE19622521C2 (en) * | 1996-06-05 | 1998-09-17 | Fraunhofer Ges Forschung | Extrusion process for the continuous production of organically bound molded parts and device for carrying out the process |
US5740898A (en) * | 1996-10-24 | 1998-04-21 | Macmillan Bloedel Limited | Method and apparatus for laying up strands |
DE19712440A1 (en) * | 1997-03-25 | 1998-10-01 | Hymmen Theodor Gmbh | Chipboard/fibreboard manufacturing appliance |
DE10041838A1 (en) * | 1999-08-25 | 2001-04-12 | Ake Innotech Automatisierung K | Structuring fibers in fleece formed aerodynamically, is achieved by passing between endless belts which compress it to desired final dimension |
DE10224090A1 (en) | 2002-05-31 | 2003-12-11 | Metso Paper Inc | Chipboard manufacturing process releases loose continual supply of dried fibrous material into an adhesive wetting zone followed by vigorous high-energy compression |
EP2723546B1 (en) * | 2011-06-27 | 2018-08-22 | Kingspan Holdings (IRL) Limited | Method for manufacturing an insulation panel |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD29187A (en) * | ||||
DE350674C (en) * | 1919-11-06 | 1922-03-24 | Carl Lenkey | Method and device for the continuous production of multilayer boards from fiber material and a hydraulic binder |
DE623315C (en) * | 1935-01-10 | |||
US2728939A (en) * | 1951-01-03 | 1956-01-03 | Allwood Inc | Apparatus for producing composite wooden boards and the like |
DE1172424B (en) * | 1961-09-29 | 1964-06-18 | Peter Voelskow | Process for the production of corrugated wood-based panels |
SU424733A1 (en) * | 1972-07-18 | 1974-04-25 | вающей промышленности | |
DE2253648A1 (en) * | 1972-11-02 | 1973-07-19 | Knauf Westdeutsche Gips | DEVICE FOR MANUFACTURING PLASTER PANELS, IN PARTICULAR INTERMEDIATE PANELS |
AT333642B (en) * | 1975-01-24 | 1976-12-10 | Oesterr Heraklith Ag | PROCESS AND DEVICE FOR THE AUTOMATIC DOSING OF UNMORTED OR MORTED WOOD WOOL FOR THE SUBSEQUENT DEFORMING TO LIGHTWEIGHT PANELS |
DE2722356C2 (en) * | 1977-05-17 | 1982-07-29 | Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe | Method and device for the continuous production of chipboard, fiber or the like. plates |
CN1009443B (en) * | 1986-11-14 | 1990-09-05 | 库特·赫尔德·法布里肯特 | Process and apparatus for producing composite wood sheet |
-
1989
- 1989-09-15 DE DE3930840A patent/DE3930840A1/en active Granted
-
1990
- 1990-09-15 CA CA002042058A patent/CA2042058A1/en not_active Abandoned
- 1990-09-15 EP EP90913063A patent/EP0448657B1/en not_active Expired - Lifetime
- 1990-09-15 WO PCT/DE1990/000709 patent/WO1991004142A1/en active IP Right Grant
- 1990-09-15 US US07/679,036 patent/US5185115A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9104142A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2042058A1 (en) | 1991-03-16 |
WO1991004142A1 (en) | 1991-04-04 |
EP0448657B1 (en) | 1994-03-09 |
US5185115A (en) | 1993-02-09 |
DE3930840C2 (en) | 1993-09-23 |
DE3930840A1 (en) | 1991-03-28 |
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