EP1435281A1 - Procédé et presse pour la fabrication en continu de panneaux en fibres lignocellulosiques - Google Patents

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

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Publication number
EP1435281A1
EP1435281A1 EP03029960A EP03029960A EP1435281A1 EP 1435281 A1 EP1435281 A1 EP 1435281A1 EP 03029960 A EP03029960 A EP 03029960A EP 03029960 A EP03029960 A EP 03029960A EP 1435281 A1 EP1435281 A1 EP 1435281A1
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EP
European Patent Office
Prior art keywords
pressure
continuously operating
operating press
pressed
press
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
EP03029960A
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German (de)
English (en)
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EP1435281B1 (fr
Inventor
Gernot Dr. Von Haas
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Dieffenbacher GmbH and Co KG
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Dieffenbacher GmbH and Co KG
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Publication of EP1435281A1 publication Critical patent/EP1435281A1/fr
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    • 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 and a plant for continuous Manufacture of wood-based panels according to the preamble of claim 1, a plant for performing the method according to claim 11 and a continuously operating press according to claim 12.
  • a method for the continuous production of wood-based panels, in particular panels in the thickness range 1-9 mm, in the dry method is known. Such a method is described, for example, in DE 101 63 090, it being possible in particular to produce plates with low adhesive contents using this method.
  • DE 101 09 316 describes a process for the continuous production of a wood-based panel with very short pressing times. A very reactive adhesive system is used for this. These short press times result in a feed rate of almost 1000 mm / sec. Higher feeds are currently not technically possible due to limitations on the forming belt.
  • DE 195 18 879 discloses a method with which, after precompression, the chip fiber mat in the inlet gap in the following main press sections by means of flexible press frames and / or press segments decompresses and compresses a low-pressure zone with a steep incline or fall angle Tangents ⁇ and ⁇ 1 of approximately 0.05 for a vertical stroke from 0 to approximately 10 mm increasing extremely briefly at maximum production speed during production (online) can be controlled.
  • the existing processes and systems have some disadvantages in the production of thin plates. This essentially concerns the average density achieved and the surface density of the plate.
  • Thin boards with a thickness of 2 - 4 mm from the wet process are partly replaced by fiberboard of the same thickness from the dry process and chipboard with a thickness of about 15 mm.
  • the 15 mm chipboard absorbs about the same force as the fiberboard. But by using the thick chipboard, the furniture becomes heavier, so that only a limited use is possible.
  • the thin panels are mainly used as furniture back panels and drawer bottoms. With this use, they can also be coated or painted on one side. In recent times, the direct painting of the board surface has become increasingly popular. The previously necessary grinding process is no longer necessary. However, the panels have to meet certain requirements for economical, direct painting.
  • the surface density must be over 1000 kg / m 3 and the maximum density must be directly on the surface. At a lower density, the lacquer is absorbed by the plate, which leads to higher costs due to the increased use of lacquer.
  • Relief is also quick with the existing double belt presses after the formation of the cover layer not possible, which also causes the Width of the top layer density is formed unnecessarily large.
  • the discharge is due to the limited flexibility of the heating plates, i.e. the possible ones Deformation per meter of press length, not possible.
  • the use of longer presses where the flexibility could be less per meter of press length is at short pressing times uneconomical.
  • the invention has for its object to provide a method with which with very short pressing times, thin fiberboard with an optimal density profile, in particular a high density in the cover layers with a difference in density between the top and middle layers, and a to create continuously working press to carry out the process.
  • the mat to be pressed is preheated with steam and / or sprayed with water, after contacting the steel strips heated to 140 ° Celsius and more A specific pressing pressure of greater than 2 N / mm 2 is applied for 2 seconds, which is kept almost uniform over the width in the inlet area, after 3 seconds of contact, the pressure is reduced to below 1 N / mm 2 , whereby the pressed material mat is compressed beforehand to approximately the thickness of the finished plate and then the pressure relief is further reduced to 0.5 N / mm 2 .
  • a second solution for the production of fiberboard which is more highly compressed on one side can be found in claim 2 and is characterized in that the material to be pressed is preheated with steam and / or sprayed with water on its upper side after contact with the one heated to 140 ° Celsius and more after 2 seconds, a specific pressing pressure of greater than 2 N / mm 2 is applied to the upper steel strip, which is kept almost uniform over the width in the inlet area; after 3 seconds of contact, the pressure is released to below 1 N / mm 2 , with the material to be pressed on beforehand about finished plate thickness is compressed and then the pressure relief is further reduced to 0.5 N / mm 2 .
  • the system for carrying out the method comprises a scattering station for forming a two or multilayer pressed material mat on a continuously moving forming belt, a pretreatment device for the pressed material mat for adjusting the heat and / or the moisture and a continuously operating press for pressing and hardening the pressed material mat under pressure and Warmth.
  • the solution for a continuously operating press is that the press length of the continuously operating press is less than 11 m, the inlet area has a length of 1.3 m to 1.7 m and is provided with a joint in the upper part, and that the upper heating plate is designed to expand the press nip after 1.8 to 2.4 m mat contact for a relief impact, for which the heating plate thickness is between 90-100 mm and is provided with flexible rolling plates compared to the roller bars.
  • thin fiberboard can be produced with the shortest pressing times with high density differences between the cover layers and the middle layer, with a density of over 1000 kg / m 3 in the cover layers and below 600 in the middle layer kg / m 3 , with an average density of the plate less than 750 kg / m 3 , can be achieved.
  • microfibers are very useful for this which the fiber structure has been preserved in terms of length, but the cell walls are partially disassembled so that the lumen of the cell is exposed.
  • the cover layers with microfibers are scattered by a separate one Fine material spreading machine or by a separating spreading machine. With these In addition to the closed surface, microfibers also become bending forces transmitted, whereby higher bending strengths are achieved. rough Fiber bundles or lumps of glue are expediently placed before being deposited resolved and / or detected with a special device before scattering.
  • the paint consumption when directly painting an entire paint line depends on the point on a plate surface that has the lowest density. Targeted overcoats Areas with a low surface density are not possible. To achieve low paint consumption, the Panels both across the width and length of the panel surface have a consistently high density. This is achieved when across the width the specific pressing pressure is applied almost evenly in the inlet area becomes.
  • the path must be maintained or slightly relieved to prevent the interior of the mat layers from being further compressed by moisture and temperature increases.
  • the mat After forming the top layer maximum in the desired width, the mat must be relieved as quickly as possible so that only a compressive stress of less than 0.5 N / mm 2 is applied to prevent further near-surface mat layers from being compressed. This is possible with the method and the system according to the invention by means of the relief shock and the soft heating plates with a thickness between 90 and 100 mm, which according to the invention is arranged 1.8 to 2.4 m after mat contact.
  • the relief shock can be designed in such a way that a relief of up to 2.5 mm is possible, the bending with these soft heating plates and adjacent rolling plates according to DE 40 10 308 and by means of an ankle joint between two heating plates being achievable over a very short distance ,
  • the heating plates after the run-in are very relieved flexibly trained. So it can do more immediately after running in than with other double belt presses are relieved or the distance up to Discharge shock can be maintained to an even higher and wider To reach the top layer.
  • the high flexibility of the heating plates in this This means that the density profile profile in the cover layers in one area to design a wider area than before.
  • the press with a discharge shock of this size equipped can be a very big way faster at the right time are relieved than with other double belt presses. So that a U-shaped Density profile, i.e. a very rapid drop in the top layer density to reach the middle class density.
  • the compaction to the final dimension of the plate (secondary compaction) is carried out after the middle of the mat has been heated to about 100 ° C. Depending on the press speed and plate thickness, this point in time or the distance from the start of the press differs. Since the press is very short, the second compaction must also be carried out over a short distance. To get the necessary flexibility in this area, the heating plate must be made less than 100 mm thick and the frame distance reduced to about 1000 mm. As an alternative or as a supplement, the heating plate can also be subdivided and the joints can be designed as load joints from approx. 5 m. The load impacts are preferably arranged after 5 and 7 m.
  • the temperature of the Steel straps with mat contact In addition to the flexibility of the heating plates, the temperature of the Steel straps with mat contact. The temperature must be above 140 ° C preferably 155 ° C, so at the time of maximum Adequate heating of the mat surfaces took place under pressure Has. If the mat has been sprayed, the water must be high Evaporation enthalpy can be evaporated over a very short distance. Therefore the press must be against the environment, but especially with good insulation of steel tape and roller bars in the return line. A Inlet drum heating and preheating of the roller bars is still from Advantage. These measures are only in the upper one with one-sided paintable panels Press body necessary.
  • the steel strip temperature By setting the Steel strip temperature on the good side of the plate (usually the upper side), a higher cover layer density can also be generated on the good side than on the lower side of the plate. This allows the average density of the plate lower further.
  • the steel strip temperature should be preferred should only be set higher in the inlet, otherwise it will be lower Heating plate temperature of the bottom increases the pressing time.
  • the heating plates need to be equipped with only one heating circuit, since at a large temperature difference between the thin plates and the short press lengthwise to the heating plate is not necessary.
  • Fiberboard with an average density of less than 740 kg / m 3 and a cover layer density of 1040 kg / m 3 can now be produced by the method and the design of the press according to the invention, which was previously not possible on any other press. Due to the high steel strip temperature in the inlet, very short pressing times can also be achieved.
  • Directly painted panels require a very smooth surface.
  • clumps of glue or local scattering are common specific pressure increased to a few centimeters in the press locally.
  • This Pressure peaks lead to indentations in the area of the maximum pressing pressure of the steel strip.
  • the indentations reduce the value of the directly paintable Plates significantly.
  • the steel band should be made as thick as possible.
  • Can currently Steel strips with a thickness of 3 mm can be delivered without any problems.
  • the fat one Steel tape must only be used at the top, provided that the plate only to be painted on one side.
  • the heating plate in the Range of maximum pressure can be made softer. This will be done via the entire hotplate width arranged small cylinders that are lower Giving distance to pressure.
  • the press With regard to transverse deformation, the press must pass through the infeed area Width have approximately the same press nip thickness, which also the specific pressure across the width is almost constant. Because of the constant sp. Pressure across the width is also the top layer evenly across the width educated. Since the plate thickness differences are not very large, is too Press start with an adjustment of the press gap across the width one Production possible without any problems.
  • This setting can be made using, for example Underlay the heating plates can be made. Must at the press outlet however, a possibility for exact thickness adjustment across the width transverse deformation of the heating plate can be provided. This can lead to Example can be performed using multipots.
  • the system in Figure 1 is shown in side view.
  • the pretreatment device 2 in the The scattering station 1, the pretreatment device 2 and the continuously operating press 3.
  • the spreading station 1 either a Three or two-layer pressed material mat on the gas-permeable forming belt 6 sprinkled, then with the forming tape 6 over the inlet gap 19 in the continuously operating press 3 is inserted and there to a fiberboard 5 pressed.
  • the mat 4 is pressed Steam preheated and / or sprayed with water.
  • the continuously operating press 3 consists in its main parts of the upper frame part 7, the lower frame part 8 and frames 20 connecting them.
  • the heating plates 13 and 14 arranged in the frame part 8 are moved by means of hydraulic cylinder piston units (not shown) moved up and down against the lower heating plate 12 and locked in the selected position.
  • a steel band 9 is arranged and guided all around the lower frame part 8 and in steel band 10 around the upper frame part 7.
  • the steel strips 9 and 10 are pulled by drive drums 21 and 22 through the press nip 23 and deflected at the beginning by means of inlet drums 17 and 18.
  • the steel strips 9 and 10 are also provided with a rolling rod carpet which is formed from roller rods 16.
  • a rolling rod carpet which is formed from roller rods 16.
  • hardened rolling plates 15 of low density are attached to them.
  • the application of the rolling plates 15 on the heating plates 12, 13 and 14 is shown in detail in DE 40 10 308 C2.

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)
  • Veneer Processing And Manufacture Of Plywood (AREA)
EP03029960A 2002-12-30 2003-12-30 Procédé et presse pour la fabrication en continu de panneaux en fibres lignocellulosiques Expired - Lifetime EP1435281B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10261730A DE10261730A1 (de) 2002-12-30 2002-12-30 Verfahren mit Anlage und kontinuierlich arbeitende Presse zur Herstellung von Holzwerkstoffplatten
DE10261730 2002-12-30

Publications (2)

Publication Number Publication Date
EP1435281A1 true EP1435281A1 (fr) 2004-07-07
EP1435281B1 EP1435281B1 (fr) 2010-06-02

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EP03029960A Expired - Lifetime EP1435281B1 (fr) 2002-12-30 2003-12-30 Procédé et presse pour la fabrication en continu de panneaux en fibres lignocellulosiques

Country Status (3)

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EP (1) EP1435281B1 (fr)
AT (1) ATE469742T1 (fr)
DE (2) DE10261730A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1435288A3 (fr) * 2002-12-30 2005-12-21 Dieffenbacher GmbH & Co. KG Presse à fonctionnement continu
EP2233261A1 (fr) * 2009-03-23 2010-09-29 China Foma (Group) Co., Ltd. Verfahren zum Pressen von Matten mit einer kontinuierlichen Presse und Vorrichtung zur Ausführung des Verfahrens
EP2236258A1 (fr) * 2009-04-01 2010-10-06 Dieffenbacher GmbH + Co. KG Procédé de fabrication de plaques en matière première dans une presse fonctionnant en continu et presse fonctionnant en continu
WO2011116986A1 (fr) * 2010-03-26 2011-09-29 Dieffenbacher Gmbh + Co. Kg Procédé pour fabriquer des plaques de matériau dans une presse travaillant de façon continue et une presse travaillant de façon continue
CN102241045A (zh) * 2011-07-08 2011-11-16 中国林业科学研究院林业新技术研究所 一种辊盘式连续压机
CN102490245A (zh) * 2011-12-22 2012-06-13 三门峡市易兴人造板设备有限公司 双钢带连续平压机
EP3406435A1 (fr) * 2017-05-18 2018-11-28 Siempelkamp Maschinen- und Anlagenbau GmbH Procédé et presse de compression d'une natte de matériau comprimable
CN109843569A (zh) * 2016-10-18 2019-06-04 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和连续式压机
WO2021119701A1 (fr) * 2019-12-19 2021-06-24 Berndorf Band Gmbh Presse à double bande comprenant au moins un dispositif de pression
CN113840702A (zh) * 2019-05-24 2021-12-24 辛北尔康普机器及成套设备有限责任公司 用于加热压制材料垫的方法和装置
CN108698354B (zh) * 2016-02-19 2024-03-05 迪芬巴赫机械工程有限公司 用于监测和/或调节润滑状态的设备和方法及压力机

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102259373B (zh) * 2011-07-08 2013-11-06 中国林业科学研究院林业新技术研究所 一种用于加工板材的辊盘式连续压机
CN102259372A (zh) * 2011-08-05 2011-11-30 青岛国森机械有限公司 一种长规格竹木集成材压制设备
CN103009667B (zh) * 2012-12-27 2015-10-07 中国福马机械集团有限公司 连续压机框架组件及连续压机
CN104552503B (zh) * 2015-01-30 2017-02-22 北京林业大学 一种连续气动浮压短周期贴面热压机

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133817A1 (de) * 1981-08-27 1983-03-17 G. Siempelkamp Gmbh & Co, 4150 Krefeld Vorrichtung zum kontinuierlichen pressen von pressgutmatten
US5775214A (en) * 1995-05-28 1998-07-07 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Apparatus for the continuous production of particle, fiber, plastic and wood boards
US6344101B1 (en) * 1998-08-13 2002-02-05 Maschinfabrik J. Dieffenbacher Gmbh & Co. Method for producing boards of wood-based materials with structured and smooth surfaces using a continuously operating embossing press
DE10045681A1 (de) * 2000-09-15 2002-03-28 Dieffenbacher Gmbh Maschf Kontinuierlich arbeitende Presse
US20020036046A1 (en) * 1997-03-18 2002-03-28 Sten Dueholm Method of manufacturing chipboards, fibre boards and the like boards
US6439113B1 (en) * 1999-04-23 2002-08-27 G. Siempelkamp Gmbh Method of pressing mats into the production of pressed board
DE10106815A1 (de) * 2001-02-14 2002-08-29 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur Herstellung von Holzwerkstoffplatten
DE10123793A1 (de) * 2001-05-16 2002-11-28 Metso Paper Inc Verfahren zur kontinuierlichen Herstellung von Holzspanplatten und ähnlichen bahnförmigen Plattenwerkstoffen und entsprechende Doppelbandpresse
DE10124928A1 (de) * 2001-05-21 2002-12-05 Metso Paper Inc Doppelbandpresse

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133817A1 (de) * 1981-08-27 1983-03-17 G. Siempelkamp Gmbh & Co, 4150 Krefeld Vorrichtung zum kontinuierlichen pressen von pressgutmatten
US5775214A (en) * 1995-05-28 1998-07-07 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Apparatus for the continuous production of particle, fiber, plastic and wood boards
US20020036046A1 (en) * 1997-03-18 2002-03-28 Sten Dueholm Method of manufacturing chipboards, fibre boards and the like boards
US6344101B1 (en) * 1998-08-13 2002-02-05 Maschinfabrik J. Dieffenbacher Gmbh & Co. Method for producing boards of wood-based materials with structured and smooth surfaces using a continuously operating embossing press
US6439113B1 (en) * 1999-04-23 2002-08-27 G. Siempelkamp Gmbh Method of pressing mats into the production of pressed board
DE10045681A1 (de) * 2000-09-15 2002-03-28 Dieffenbacher Gmbh Maschf Kontinuierlich arbeitende Presse
DE10106815A1 (de) * 2001-02-14 2002-08-29 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur Herstellung von Holzwerkstoffplatten
DE10123793A1 (de) * 2001-05-16 2002-11-28 Metso Paper Inc Verfahren zur kontinuierlichen Herstellung von Holzspanplatten und ähnlichen bahnförmigen Plattenwerkstoffen und entsprechende Doppelbandpresse
DE10124928A1 (de) * 2001-05-21 2002-12-05 Metso Paper Inc Doppelbandpresse

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1435288A3 (fr) * 2002-12-30 2005-12-21 Dieffenbacher GmbH & Co. KG Presse à fonctionnement continu
EP2233261A1 (fr) * 2009-03-23 2010-09-29 China Foma (Group) Co., Ltd. Verfahren zum Pressen von Matten mit einer kontinuierlichen Presse und Vorrichtung zur Ausführung des Verfahrens
EP2236258A1 (fr) * 2009-04-01 2010-10-06 Dieffenbacher GmbH + Co. KG Procédé de fabrication de plaques en matière première dans une presse fonctionnant en continu et presse fonctionnant en continu
EP2236258B1 (fr) 2009-04-01 2015-07-08 Dieffenbacher GmbH Maschinen- und Anlagenbau Procédé de fabrication de plaques en matière première dans une presse fonctionnant en continu et presse fonctionnant en continu
CN102917865A (zh) * 2010-03-26 2013-02-06 迪芬巴赫机械工程有限公司 用于在连续运行式压力机内生产材料板的方法和连续运行式压力机
WO2011116986A1 (fr) * 2010-03-26 2011-09-29 Dieffenbacher Gmbh + Co. Kg Procédé pour fabriquer des plaques de matériau dans une presse travaillant de façon continue et une presse travaillant de façon continue
CN102241045A (zh) * 2011-07-08 2011-11-16 中国林业科学研究院林业新技术研究所 一种辊盘式连续压机
CN102490245B (zh) * 2011-12-22 2014-01-22 三门峡市易兴人造板设备有限公司 双钢带连续平压机
CN102490245A (zh) * 2011-12-22 2012-06-13 三门峡市易兴人造板设备有限公司 双钢带连续平压机
CN108698354B (zh) * 2016-02-19 2024-03-05 迪芬巴赫机械工程有限公司 用于监测和/或调节润滑状态的设备和方法及压力机
CN109843569A (zh) * 2016-10-18 2019-06-04 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和连续式压机
EP3406435A1 (fr) * 2017-05-18 2018-11-28 Siempelkamp Maschinen- und Anlagenbau GmbH Procédé et presse de compression d'une natte de matériau comprimable
CN108943320A (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
DE102017110875B4 (de) * 2017-05-18 2020-07-16 Siempelkamp Maschinen- Und Anlagenbau Gmbh Verfahren zum Verpressen einer Pressgutmatte
CN108943320B (zh) * 2017-05-18 2021-06-15 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
CN113840702A (zh) * 2019-05-24 2021-12-24 辛北尔康普机器及成套设备有限责任公司 用于加热压制材料垫的方法和装置
WO2021119701A1 (fr) * 2019-12-19 2021-06-24 Berndorf Band Gmbh Presse à double bande comprenant au moins un dispositif de pression
CN114746263A (zh) * 2019-12-19 2022-07-12 百德福钢带有限公司 具有至少一个压制装置的双带式压机

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Publication number Publication date
EP1435281B1 (fr) 2010-06-02
DE10261730A1 (de) 2004-07-08
ATE469742T1 (de) 2010-06-15
DE50312762D1 (de) 2010-07-15

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