EP1323509A1 - Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques - Google Patents

Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques Download PDF

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Publication number
EP1323509A1
EP1323509A1 EP02028550A EP02028550A EP1323509A1 EP 1323509 A1 EP1323509 A1 EP 1323509A1 EP 02028550 A EP02028550 A EP 02028550A EP 02028550 A EP02028550 A EP 02028550A EP 1323509 A1 EP1323509 A1 EP 1323509A1
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EP
European Patent Office
Prior art keywords
mat
steam
press
water
wood
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
Application number
EP02028550A
Other languages
German (de)
English (en)
Other versions
EP1323509B1 (fr
Inventor
Gernot Dr. Von Haas
Gerhard Melzer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dieffenbacher GmbH and Co KG
Original Assignee
Maschinenfabrik J Dieffenbacher GmbH and Co
Dieffenbacher GmbH Maschinen und Anlagenbau
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik J Dieffenbacher GmbH and Co, Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Maschinenfabrik J Dieffenbacher GmbH and Co
Priority to EP06010284A priority Critical patent/EP1688230B1/fr
Publication of EP1323509A1 publication Critical patent/EP1323509A1/fr
Application granted granted Critical
Publication of EP1323509B1 publication Critical patent/EP1323509B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • 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
    • B27N1/00—Pretreatment of moulding material
    • 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
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
    • 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

Definitions

  • the invention relates to a method for the continuous production of Wood-based panels according to the preamble of claim 1 and a plant for performing the method according to claim 17.
  • a process for the continuous production of wood-based panels, especially of plates with a closed plate surface on both Pages in the thickness range of 1.5 - 6 mm in the dry process are known.
  • a mat is formed from a scattering station after the pre-pressing and sprayed the mat trimming with water on the mat top.
  • the ribbon on which the mat is sprinkled is also watered sprayed.
  • the lignocellulosic particles have a moisture content below 15% As a rule, the mat's moisture content is around 9%.
  • a higher humidity can must not be set, otherwise the hot press will burst.
  • the Blowouts are caused by a high vapor pressure, which in turn has its cause in the high humidity. At a humidity higher than 15% a sieve in the hot press would have to be used for evaporation.
  • the associated screen print is annoying and must be sanded become.
  • the spraying ensures that a closed one in the hot press High density plate surface is formed, the density maximum is close to the plate surface.
  • the water on the mat will partly from the lignocellulosic particles, which are in the outermost Plate layer are included. The bound moisture of these particles increases. Due to the increase in moisture, the particles become hot pressed after heating to just over 100 ° C very soft and flow under the specific pressure.
  • release agent is added to the spray water or the release agent is sprayed directly onto the forming belt.
  • the release agent makes it possible to spray a larger amount of water onto the forming belt without the particles sticking to the forming belt.
  • the cost of the release agent per m 2 of plate produced is considerable.
  • the amount of spray that is absorbed by the forming belt through the particles lying on the forming belt is limited.
  • the water has to be drawn into the mat against gravity by capillary forces. This different application quantity at the top and bottom often causes the plates to bend after leaving the hot press. In order to avoid this curvature, it is then necessary to spray less onto the upper mat surface.
  • the adhesive consumption in the dry process is much higher than in Semi-dry and wet processes, since the hydrogen bonds in Drying processes cannot be used in the same way.
  • the boiler temperature in today's systems is below 190 ° C (12 bar Vapor pressure) to prevent the plates from having a dark color.
  • the object of the present invention is now to specify a method and a To create plant with the wood-based panels with closed Surface can be produced using the dry process and with this process the semi-dry and wet process of fibreboard production by one more environmentally friendly and cheaper drying process is to be replaced.
  • the solution to this problem for the method is that the wood chips are cooked at over 12 bar, preferably at 16 bar, with a residence time of more than 3 minutes.
  • the fibers are then glued with an adhesive containing predominantly phenolic components in a blowpipe and / or in a mixer, the dosage being below 5% solid resin based on dry wood, the scattered mat with a moisture content of ⁇ 15% is immediately before the continuously working Press is moistened by water spraying from 5 to 80 g / m 2 on the top of the mat and by steam in an appropriate amount on the underside of the mat and the mat thus prepared is introduced into the continuously operating press and at the beginning with a maximum specific pressure of 2.5 N / mm 2 to 5.5 N / mm 2 compressed and cured to a fiberboard with surfaces closed on both sides.
  • the solution for a system according to the method is characterized by following combination arranged in the working direction: on Wood chip cooker, a gluing device made from a blowpipe and / or mixer, a ribbon water sprayer, a spreader to form a Mat on a continuously moving forming belt, one Water spray device for moistening the top of the mat, if necessary a pre-compression and preheating device, an evaporation device with or without sieve belt for the top of the mat, a steaming device for the underside of the mat, with one running around as a mat feed path Screen belt is steamed and a continuously working press.
  • the process must be carried out so that the wood chips at high temperature in the cooker (190 to 230 ° C, steam pressure 12 to 16 bar) and long dwell times (greater than 3 minutes) are pretreated thermally that glucinable substances arise from the hemicelluloses, the lignin the fiber surface is activated and a very open pulp without a large proportion of coarse fiber bundles. Through this Pretreatment creates dark fibers and is therefore independent of the Use a dark glue on dark sheets.
  • the wood chips are steamed in the cooker preferably at 200 to 210 ° C for 4 minutes. With this combination, on the one hand, it becomes sufficiently bondable Substances are formed and the lignin is activated and secondly the The strength of the fiber is not reduced too much.
  • the fibers thus produced tend to be closed when hot-pressed Plate surface run as fibers that are cooked at low temperature provided the fibers are sufficiently moistened before hot pressing become.
  • the moistening is according to the invention on the top of the mat with a water spray and on the bottom with a Steam humidification performed.
  • the closed surfaces achieved is based on the combination of very well-digested fiber and Humidification returned.
  • the fibrous material contains hardly any fiber bundles. Fiber bundles are more rigid than individual fibers. You can do not nestle into individual cavities as well as individual fibers. By pretreatment at high temperature will also increase the rigidity of the individual fibers reduced, so that the individual fiber at the Hot press softens more easily.
  • the mat is moistened on the underside with a targeted, flat introduction of steam immediately before the hot press.
  • the steam should have a pressure of 1.01 to 1.3 bar (absolute), preferably 1.01 bar and should be as saturated or as little as possible overheated.
  • the steam pressure must not be too high, otherwise the mat will lift off the sieve belt due to the steam.
  • the amount of steam introduced is measured and regulated. Due to the condensation of the steam, the mat moisture is increased by approx. 5% - depending on the initial moisture of the mat and the mat temperature.
  • the top of the mat can be sprayed with 20 g / m 2 of water and the same amount of moisture is applied to the underside with the introduction of 20 g / m 2 of steam fed.
  • 400 g of wood are moistened by the steam and heated from 35 ° C to almost 100 ° C.
  • About 13% of the total mat thickness is therefore moistened by the steam. This means that the moisture is still limited to the outer area of the mat.
  • the amount of steam can be increased slightly compared to the amount of water sprayed. Due to the high temperature of the wood particles, the condensed water is absorbed by the wood extremely quickly, so that an almost similarly closed surface is created on the underside as on the top, the density maximum is also increased and the density maximum is closer to the plate surface.
  • the moisture content must be higher than that in the conventional drying method, preferably 12 to 14%. Due to the higher humidity, the fibers are less stiff during hot pressing, which increases the contact area between the fibers. The larger contact area is important in order to obtain an adhesive connection over the activated fiber surface and also promotes the formation of hydrogen bonds.
  • the pressing time must be extended by at least 15% due to the longer curing time of the adhesive, the time-consuming activation of the adhesive substances and the longer evaporation. In order to avoid a large extension of the pressing time, a high heating plate temperature at the beginning of the hot pressing has proven to be favorable.
  • the steam is passed through a sieve belt, which consists of a steam-resistant Material such as steam-resistant plastic should consist of a steam box into the mat.
  • the transfer belt should be in the Press to be run as a screen belt. On this transfer belt, the Mat transported into the press.
  • This process can now be used to close panels with a very good seal Surface on the top and well closed surface on the Bottom are produced. It is possible to produce plates without that release agent is applied to the forming belt, which is the Production costs of the plant significantly reduced. The plates can even can be painted directly on both sides without having to sand them beforehand.
  • a combination of spraying and subsequent dampening with steam on the top and bottom of the mat is also possible.
  • the invention can be carried out in such a way that 20 g / m 2 of water are sprayed on the top and 15 g / m 2 of steam is introduced and on the underside 5 g / m 2 of water are sprayed onto the forming belt and 30 g / m 2 of steam are introduced becomes.
  • the more steam is moistened and preheated the more the pressing speed can be increased.
  • an optimal compromise between moistening by spraying and steam introduction must be found for each plate range.
  • the hot press can be designed in such a way that the press plate temperature for the upper and lower heating plate can be set differently, which means that with only steam humidification from below and one-sided spraying from above, uniform heating through a higher upper press plate temperature can be achieved.
  • the plant for performing the method is shown in side view.
  • An advantage with regard to the system is that the press length can be limited to less than 15 m.
  • a pre-press of the usual type is not necessary due to the low feed rate of less than 200 mm / s for plates 10 thicker than 10 mm and the absence of a width adjustment.
  • the dampening apparatus 1, 3, 4 and 10 is very slightly pre-compressed and the upper half of the mat is also moistened.
  • the pre-compression should take place to a density of about 70 kg / m 3 , that is about 30% of the original bed height. This only requires a specific pressure of a maximum of 0.3 N / mm 2 , which means that the pre-compression and preheating apparatus 4 can be designed in an inexpensive, lightweight construction.
  • Phenol glue in contrast to aminoplast resins at the end of the blowpipe (not shown) must be injected into the tube shortly before the dryer.
  • the Phenol glue leads to caking on the inner wall of the blowpipe, which only can be removed mechanically.
  • aminoplast glue With aminoplast glue, the Caking by hydrolysis with time reduced during operation without that mechanical removal is necessary. Beneficial for one Trouble-free operation has also been shown to occur shortly after dosing a switch is installed so that there is the possibility of a pipe clean and pass the fiber stream through the other.
  • the dark panels produced in this way must be thermally after hot pressing be treated.
  • the plates are replaced by a Run heat channel or piled warm in a heated hall.
  • the fibreboards are used to carry out the heat treatment 11warm piled up or pulled as a package through a heat channel.
  • the device for introducing steam each consists of a steam box 5 and 10, on which openings, for example in the form of slots, are introduced on the mat side.
  • the steam boxes 5 and 10 can be additionally heated to avoid condensate or a condensate separator is connected.
  • the steam boxes 10 are installed in the screen belt 9 directly before the inlet of the continuous press 6.
  • the steam box 10 should be installed as close as possible in front of the continuously operating press 6 in order to prevent the adhesive from pre-curing. If moistening is also to take place on the top of the mat 8, an upper steam box 5 with a further rotating sieve belt must be used.
  • the system is also executed without a pre-press, then the steam box 5 must be pre-compressed over a short distance using a pre-compression and preheating device 4. To do this, the sieve can be guided over rollers.
  • a typical system with a spreading machine 2, pre-press, a continuously operating press with a length greater than 15 m, cooling star turner and stacking requires high investment costs

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
EP02028550A 2001-12-20 2002-12-20 Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques Expired - Lifetime EP1323509B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06010284A EP1688230B1 (fr) 2001-12-20 2002-12-20 Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10163090A DE10163090A1 (de) 2001-12-20 2001-12-20 Verfahren zur kontinuierlichen Herstellung von Holzwerkstoffplatten
DE10163090 2001-12-20

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP06010284A Division EP1688230B1 (fr) 2001-12-20 2002-12-20 Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques

Publications (2)

Publication Number Publication Date
EP1323509A1 true EP1323509A1 (fr) 2003-07-02
EP1323509B1 EP1323509B1 (fr) 2008-05-28

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EP06010284A Expired - Lifetime EP1688230B1 (fr) 2001-12-20 2002-12-20 Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques
EP02028550A Expired - Lifetime EP1323509B1 (fr) 2001-12-20 2002-12-20 Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques

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EP06010284A Expired - Lifetime EP1688230B1 (fr) 2001-12-20 2002-12-20 Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques

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EP (2) EP1688230B1 (fr)
AT (2) ATE396852T1 (fr)
DE (3) DE10163090A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008071539A1 (fr) * 2006-12-11 2008-06-19 Fritz Egger Gmbh & Co. Plaque de support
EP2388117A1 (fr) * 2010-05-17 2011-11-23 Flooring Technologies Ltd. Procédé et installation de fabrication d'une plaque en fibres de bois
ITMO20120311A1 (it) * 2012-12-20 2014-06-21 Imal Srl Metodo per la lavorazione di pannelli a base di materiale legnoso incoerente.
EP3403816A1 (fr) * 2017-05-18 2018-11-21 Siempelkamp Maschinen- und Anlagenbau GmbH Procédé de compression d'une natte de matériau comprimable
CN112166017A (zh) * 2018-05-30 2021-01-01 扎伊罗技术股份公司 制造木质板材的方法
CZ308706B6 (cs) * 2020-01-03 2021-03-10 SMART TECHNIK a.s Způsob zpracování tříděného komunálního odpadu
CN115349734A (zh) * 2022-08-19 2022-11-18 大自然科技股份有限公司 一种植物纤维床垫热压工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005055813B4 (de) * 2005-11-21 2013-03-21 Fritz Egger Gmbh & Co. Vorrichtung und Verfahren zur Herstellung von Holzwerkstoffen sowie Verfahren zur Abreinigung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999024233A1 (fr) * 1997-11-12 1999-05-20 J. M. Huber Corporation Prechauffage a la vapeur dans la fabrication de panneaux a copeaux orientes
US5942174A (en) * 1996-10-01 1999-08-24 Fraunhofer-Gosellschaft Zur Foerderung Der Angewandten Forschung E. V. Method of making organically bound wood-based materials
DE19858079A1 (de) * 1998-12-16 2000-06-21 Edmone Roffael Verfahren zur Herstellung von mitteldichten Faserplatten (MDF) mit niedriger Dickenquellung und Wasseraufnahme

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1213707A (fr) * 1984-12-28 1986-11-12 Forintek Canada Corp. Methode de fabrication d'un panneau composite dimensionnellement stable, et produit ainsi obtenu
ES2039017T5 (es) * 1988-10-28 2005-04-01 Kronospan Technical Company Ltd. Un procedimiento para fabricar articulos de material de fibra o de madera.
CA1308013C (fr) * 1989-09-25 1992-09-29 Lars Bach Procede de traitement thermique apres pressage destine a ameliorer la stabilite des panneaux de grandes particules
DE10024543A1 (de) * 2000-05-18 2001-11-22 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur kontinuierlichen Herstellung einer Mehrschichtplatte

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5942174A (en) * 1996-10-01 1999-08-24 Fraunhofer-Gosellschaft Zur Foerderung Der Angewandten Forschung E. V. Method of making organically bound wood-based materials
WO1999024233A1 (fr) * 1997-11-12 1999-05-20 J. M. Huber Corporation Prechauffage a la vapeur dans la fabrication de panneaux a copeaux orientes
DE19858079A1 (de) * 1998-12-16 2000-06-21 Edmone Roffael Verfahren zur Herstellung von mitteldichten Faserplatten (MDF) mit niedriger Dickenquellung und Wasseraufnahme

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008071539A1 (fr) * 2006-12-11 2008-06-19 Fritz Egger Gmbh & Co. Plaque de support
EP2388117A1 (fr) * 2010-05-17 2011-11-23 Flooring Technologies Ltd. Procédé et installation de fabrication d'une plaque en fibres de bois
ITMO20120311A1 (it) * 2012-12-20 2014-06-21 Imal Srl Metodo per la lavorazione di pannelli a base di materiale legnoso incoerente.
EP3403816A1 (fr) * 2017-05-18 2018-11-21 Siempelkamp Maschinen- und Anlagenbau GmbH Procédé de compression d'une natte de matériau comprimable
CN108943321A (zh) * 2017-05-18 2018-12-07 辛北尔康普机器及成套设备有限责任公司 用于挤压压制材料垫的方法
CN112166017A (zh) * 2018-05-30 2021-01-01 扎伊罗技术股份公司 制造木质板材的方法
CZ308706B6 (cs) * 2020-01-03 2021-03-10 SMART TECHNIK a.s Způsob zpracování tříděného komunálního odpadu
EP3845351A1 (fr) 2020-01-03 2021-07-07 SMART TECHNIK a.s. Procédé de traitement de déchets communaux triés
CN115349734A (zh) * 2022-08-19 2022-11-18 大自然科技股份有限公司 一种植物纤维床垫热压工艺
CN115349734B (zh) * 2022-08-19 2024-04-30 大自然科技股份有限公司 一种植物纤维床垫热压工艺

Also Published As

Publication number Publication date
EP1323509B1 (fr) 2008-05-28
ATE396852T1 (de) 2008-06-15
DE50212316D1 (de) 2008-07-10
DE10163090A1 (de) 2003-07-03
DE50212339D1 (de) 2008-07-10
ATE396853T1 (de) 2008-06-15
EP1688230A1 (fr) 2006-08-09
EP1688230B1 (fr) 2008-05-28

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