EP0448657B1 - Flach-strangpressverfahren zur herstellung von anorganisch oder organisch gebundenen holzwerkstoffen, insbesondere mehrschichtiger platten - Google Patents
Flach-strangpressverfahren zur herstellung von anorganisch oder organisch gebundenen holzwerkstoffen, insbesondere mehrschichtiger platten Download PDFInfo
- Publication number
- EP0448657B1 EP0448657B1 EP90913063A EP90913063A EP0448657B1 EP 0448657 B1 EP0448657 B1 EP 0448657B1 EP 90913063 A EP90913063 A EP 90913063A EP 90913063 A EP90913063 A EP 90913063A EP 0448657 B1 EP0448657 B1 EP 0448657B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- belts
- batch
- shaft
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000001125 extrusion Methods 0.000 title claims abstract description 7
- 230000008569 process Effects 0.000 title abstract description 21
- 239000002023 wood Substances 0.000 title abstract description 12
- 239000011230 binding agent Substances 0.000 title description 9
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000003892 spreading Methods 0.000 claims description 12
- 230000007480 spreading Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000010924 continuous production Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000004513 sizing Methods 0.000 abstract 1
- 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
- 238000005056 compaction Methods 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
- 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
- 230000008901 benefit Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation 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
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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 bound wood-based materials and to a device for carrying it out.
- a feed device for wood chips to a vertical extrusion press is known.
- the bulk material is compressed perpendicular to its transport direction due to the narrowing of the feed zone.
- the glued wood chips are fed in via a storage container, which is arranged above the press.
- the glued wood chips are simply poured into the extrusion press. Then they pass through a conically tapering zone and a subsequent, preferably heated zone in which the press belts run parallel to one another.
- the extrusion press intended for this is arranged vertically. At the exit of the press, which also runs vertically, the finished wood materials are removed. It is the production of organically bound wood materials.
- the length of a holding unit required to maintain the dimension of the setting plates, i.e. A calibration press therefore results from the total hydration period 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. For scattering stations arranged one behind the other, there are limits to the rapid start of hydration for design reasons, i.e. the hydration starts later, the total hydration takes longer and the calibration unit also has to be carried out longer. The usual press lengths would be about 50m.
- extrusion processes are also known in which the pressing pressure is exerted parallel to the plate plane in such a way that the wood chips are continuously pressed through a heated strand or channel with a rectangular or differently shaped cross section and the wood chipboard is formed in the process.
- This process is a so-called Okal process, (in e.g. Franz Kollmann, Holzspannwerkstoffe, page 5 / 9ff).
- the chips are metered into a vertical press channel and compressed by a cyclically working stamp. Wander through the chips compacted in this way a heated molding channel, the length of which is so determined that the chips are glued sufficiently well.
- the pressing times are relatively short, since the chips are glued together on the surface due to the heat development.
- the strength thus achieved means that the setting process need not proceed to the middle of the plate.
- the amount of heat stored on the plate surface is sufficient to cause the plate to bond to the plate core after leaving the press.
- an additional device, a stamp has to 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 plates produced in the Okal process is vertical runs to the plate level, which results in low bending strength of the plates produced.
- the object of the invention is to design a generic method and the device required to carry out the method so that the system can be made very compact and short while at the same time achieving high bending strength of the plates produced.
- the mixing and spreading units are arranged in such a way that a simultaneous input of the batch (s) into the shaft is ensured.
- the mixing and spreading units are preferably arranged in parallel or one above the other. It follows that, particularly in the production of multi-layer. Plates, in contrast to an arrangement of the mixing and spreading units one behind the other, the hydration can be used for all layers at the same time. In the case of inorganic binders, in particular gypsum, the 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 in the production of multi-layer plates of various components, it is completed more quickly.
- the hydration process has a direct impact on the process control: Either the subsequent calibration device can be made much shorter or the displacement speed can be selected higher.
- the economic viability of such a process is very high.
- the high flexural strength of the chipboard produced is achieved according to the present invention in that the nonwoven is compressed above the board level. Due to the conical design of the shaft formed by the rotating press belts or press plate belts, the fleece is compacted in the vertical section of the press. The compression is essential for chip orientation.
- the chips / fibers can be pre-oriented by pre-compaction in the board level. The orientation remains the stronger, the higher the cohesion of the batch is and the smaller the drop height can be chosen.
- the subsequent compaction over the plate level significantly supports the alignment of the chips in the plate level, since the individual chips try to offer the least resistance to the pressing pressure.
- This chip orientation ensures a high bending strength perpendicular to the plate level.
- a section adjoins the conically tapering shaft section in which the press belts or press plate 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 device.
- the inventive method can also be used to produce materials with a spatial shape. This can e.g. by using a divided press belt, which is adjustable in segments. The process can be effectively supported by pouring the fleece into the desired shape.
- the angle of inclination and the distance between the press parts are variable.
- the press parts can be equipped with heat supply or heat dissipation devices. The cooling of the press parts then makes sense if the solubility of dihydrate to water is to be increased during the process.
- An alternating feed of the press belts or the press plate belts supports the pulling behavior of the fleece into the press.
- the ejection devices are arranged so as to oscillate around its center line.
- the batches can be sprinkled on the press parts and not directly in the shaft. This is particularly advantageous if multi-layer wood-based materials are to be manufactured.
- a coating e.g. Film, already run into the shaft on both sides or on one side before compaction with the fleece. It is also possible to apply a coating in front of the calibration device, which then also supplies the required contact pressure.
- the device according to the invention consists of mixing and / or spreading devices 1, a compression unit 2 and a calibration device 3.
- the intensive mixers 4 and 5 the mixture of wood chips and binders for the cover layers, in the intensive mixer 6 that for the middle layer.
- the spreading stations 7, 8, 9 have the task of following Discharge belts 10, 11, 12 form a uniform chip fleece.
- 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 rotating press belts 13 and 14, which are arranged around the rollers 15, 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 horizontal section of the press, ie the parallel course of the press belts 13, 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 following calibration device 3.
- the separation between the compression and calibration device shown in this example is not absolutely necessary. These two sections 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. Discharge belt 11, which oscillates around the center line of the shaft (A, B), exist.
- a mixer e.g. Mixer 8
- only one discharge belt e.g. Discharge belt 11, which oscillates around the center line of the shaft (A, B), exist.
- FIG. 2 shows another variant of the device according to the invention, in which the press belts 14 and 13 are guided over two rollers 15 in their upper region adjoining the spreading and mixing devices 1, so that they form a surface for the spreading of the fleece .
- This design is particularly suitable for the production of multilayer plates, in particular when a discharge belt 17 is additionally provided, by means of which a third component of the batch, which is scattered into the center of the shaft B, can be input.
- the system is only started up when the vertical section of the press has been filled.
- the press belts or press plate belts 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 spreading devices 1 allow binder to be processed with very short hydration times, so that the overall length of a calibration device 3 can be considerably reduced.
- An estimate of the required length of a calibration device at a press belt speed of 5 m / min is given here as an example.
- the length of the calibration device should therefore be 260 seconds (390 ./. 130 - 260).
- the calibration time is 22m at a feed rate of 5m / p min. Compared to the usual calibration presses, the length of which is about 50 m, this means a considerable reduction in overall length with the same capacity. The economic viability of such a system is considerable.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90913063T ATE102538T1 (de) | 1989-09-15 | 1990-09-15 | Flach-strangpressverfahren zur herstellung von anorganisch oder organisch gebundenen holzwerkstoffen, insbesondere mehrschichtiger platten. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3930840 | 1989-09-15 | ||
DE3930840A DE3930840A1 (de) | 1989-09-15 | 1989-09-15 | Flach-strangpressverfahren zur herstellung von anorganisch oder organisch gebundenen holzwerkstoffen, insbes. mehrschichtiger platten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0448657A1 EP0448657A1 (de) | 1991-10-02 |
EP0448657B1 true EP0448657B1 (de) | 1994-03-09 |
Family
ID=6389504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90913063A Expired - Lifetime EP0448657B1 (de) | 1989-09-15 | 1990-09-15 | Flach-strangpressverfahren zur herstellung von anorganisch oder organisch gebundenen holzwerkstoffen, insbesondere mehrschichtiger platten |
Country Status (5)
Country | Link |
---|---|
US (1) | US5185115A (ja) |
EP (1) | EP0448657B1 (ja) |
CA (1) | CA2042058A1 (ja) |
DE (1) | DE3930840A1 (ja) |
WO (1) | WO1991004142A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE468278B (sv) * | 1989-11-21 | 1992-12-07 | Curt Andersson | Saett och anordning foer att av en komprimerbar materialblandning medelst ett munstycke och en formande roerlig matris framstaella en laangstraeckt balk |
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 (ja) * | 1994-09-05 | 1996-03-22 | Sony Corp | ビデオ装置 |
DE4443763A1 (de) * | 1994-12-08 | 1996-06-13 | Hymmen Theodor Gmbh | Kontinuierlich arbeitende Presse zum Herstellen von Holzwerkstoffplatten |
FR2733932B1 (fr) * | 1995-05-11 | 1999-01-22 | Stihl Maschf Andreas | Tronconneuse a chaine a moteur equipee d'un dispositif de freinage de la chaine |
JP2968470B2 (ja) * | 1996-02-15 | 1999-10-25 | 三木特種製紙株式会社 | 板状製品の連続製造装置及び方法 |
DE19622521C2 (de) * | 1996-06-05 | 1998-09-17 | Fraunhofer Ges Forschung | Strangpreßverfahren zur kontinuierlichen Herstellung von organisch gebundenen Formteilen und Einrichtung zur Durchführung des Verfahrens |
US5740898A (en) * | 1996-10-24 | 1998-04-21 | Macmillan Bloedel Limited | Method and apparatus for laying up strands |
DE19712440A1 (de) * | 1997-03-25 | 1998-10-01 | Hymmen Theodor Gmbh | Vorrichtung zum Herstellen von Span- oder Faserplatten aus Zellulosewerkstoffen |
WO2001014623A2 (de) * | 1999-08-25 | 2001-03-01 | Ake Innotech Gmbh | Verfahren und vorrichtung zum beeinflussen von struktur und lage der fasern im prozess der aerodynamischen vliesbildung |
DE10224090A1 (de) | 2002-05-31 | 2003-12-11 | Metso Paper Inc | Verfahren und Vorrichtung zur Benetzung faseriger Rohstoffe mit Bindemittel |
US10145101B2 (en) * | 2011-06-27 | 2018-12-04 | Kingspan Holdings (Irl) Limited | Method and apparatus for manufacturing an insulation panel |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD29187A (ja) * | ||||
DE350674C (de) * | 1919-11-06 | 1922-03-24 | Carl Lenkey | Verfahren und Vorrichtung zur ununterbrochenen Herstellung mehrschichtiger Platten aus Faserstoff und einem hydraulischen Bindemittel |
DE623315C (ja) * | 1935-01-10 | |||
US2728939A (en) * | 1951-01-03 | 1956-01-03 | Allwood Inc | Apparatus for producing composite wooden boards and the like |
DE1172424B (de) * | 1961-09-29 | 1964-06-18 | Peter Voelskow | Verfahren zur Herstellung gewellter Holzwerkstoffplatten |
SU424733A1 (ja) * | 1972-07-18 | 1974-04-25 | вающей промышленности | |
DE2253648A1 (de) * | 1972-11-02 | 1973-07-19 | Knauf Westdeutsche Gips | Vorrichtung zum herstellen von gipsplatten, insbesondere zwischenwandplatten |
AT333642B (de) * | 1975-01-24 | 1976-12-10 | Oesterr Heraklith Ag | Verfahren und vorrichtung zum automatischen dosieren unbemortelter oder bemortelter holzwolle fur die nachfolgende verformung zu leichtbauplatten |
DE2722356C2 (de) * | 1977-05-17 | 1982-07-29 | Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe | Verfahren und Vorrichtung zum kontinuierlichen Herstellen von Span-, Faser- o.dgl. Platten |
CN1009443B (zh) * | 1986-11-14 | 1990-09-05 | 库特·赫尔德·法布里肯特 | 制造复合木材制品板的方法和设备 |
-
1989
- 1989-09-15 DE DE3930840A patent/DE3930840A1/de active Granted
-
1990
- 1990-09-15 EP EP90913063A patent/EP0448657B1/de not_active Expired - Lifetime
- 1990-09-15 WO PCT/DE1990/000709 patent/WO1991004142A1/de active IP Right Grant
- 1990-09-15 CA CA002042058A patent/CA2042058A1/en not_active Abandoned
- 1990-09-15 US US07/679,036 patent/US5185115A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0448657A1 (de) | 1991-10-02 |
US5185115A (en) | 1993-02-09 |
DE3930840C2 (ja) | 1993-09-23 |
DE3930840A1 (de) | 1991-03-28 |
CA2042058A1 (en) | 1991-03-16 |
WO1991004142A1 (de) | 1991-04-04 |
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