EP1508414A2 - Méthode et presse à plateaux simples ou multiples pour la fabrication des panneaux de fibres de bois, en particulier des panneaux OSB - Google Patents

Méthode et presse à plateaux simples ou multiples pour la fabrication des panneaux de fibres de bois, en particulier des panneaux OSB Download PDF

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Publication number
EP1508414A2
EP1508414A2 EP04018778A EP04018778A EP1508414A2 EP 1508414 A2 EP1508414 A2 EP 1508414A2 EP 04018778 A EP04018778 A EP 04018778A EP 04018778 A EP04018778 A EP 04018778A EP 1508414 A2 EP1508414 A2 EP 1508414A2
Authority
EP
European Patent Office
Prior art keywords
steam
press
mat
pressed material
material mat
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.)
Withdrawn
Application number
EP04018778A
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German (de)
English (en)
Other versions
EP1508414A3 (fr
Inventor
Gernot Dr. Von Haas
Gerhard Ing. 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
Dieffenbacher GmbH and Co KG
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 Dieffenbacher GmbH and Co KG filed Critical Dieffenbacher GmbH and Co KG
Publication of EP1508414A2 publication Critical patent/EP1508414A2/fr
Publication of EP1508414A3 publication Critical patent/EP1508414A3/fr
Withdrawn legal-status Critical Current

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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
    • B27N3/086—Presses with means for extracting or introducing gases or liquids in the mat

Definitions

  • the invention relates to a method for the production of wood-based panels, in particular of OSB boards according to the preamble of patent claim 1 and a platen press for carrying out the method according to claim 22.
  • EP 0 172 930 A1 has disclosed a method for steam pressing, in which the mat is first compressed to 50% of the final thickness without steam and then further damped with various rinsing steps.
  • This patent family has in common that the mat is first slightly compacted and then the entire mat cross-section is heated to the steam temperature with the introduction of steam.
  • US Patent 4,517,147 it is described how plates without holes and markings of the steam holes in the plate surface can be made in steam pressing.
  • US 4,517,147 suggests lowering the vapor velocity below the wells. This is to be achieved by using a special sieving between mat and heating plate. Furthermore, the mat density and the vapor pressure should be set low.
  • it has not yet been possible to press wood pulp glued with phenolic resin into OSB boards in steam cycle presses because the press time in OSB production in multi-day presses is relatively long compared to other wood-based materials. For example, the press factor for an 11 mm thick OSB board is 12 s / mm, while the press factor for a chipboard is only 6 s / mm.
  • the invention has for its object to provide a method with which Wood materials, in particular phenolic resin glued wood chips (strands) with significantly reduced press time in cycle presses, one-day presses or To press multi-day presses and a platen press for the production of To create a procedure.
  • the pressed material mat is formed from a woodchip-phenolic resin mixture and introduced into the floor (s) of a single or multi-daylight and stored therein, after a slight pre-compression in a short period of time, introducing a small amount of steam with a low steam temperature on the press plates (2 ) only in the outer layers (5 and 7) of the pressed material mat (4) and then the pressed material mat is quickly compressed to the final thickness of the plate and cured.
  • the flow rate of the vapor flow for the Wash out important.
  • the leaching occurs at reduced Flow rate to a much lesser extent and the Flow velocity is strong due to the only slightly compressed mat reduced.
  • the flow velocity is at the same penetration depth and Damping duration continues to diminish when the beach width and Beach length are not too big. Because the steam is not through the beaches must flow around the beaches. It means that at very broad beaches for the same depth of penetration in the same time larger flow path must be covered and thus the Flow rate increases. It is useful, therefore, if in Woodchip binder mixture the average Schnitzelinaten not greater than 150 mm and the average chip widths not greater than 25 mm and for the production of particularly smooth surfaces of the plates thin chips are used with a small thickness of 0.5 mm.
  • the damping according to the invention is thus performed so that after a slight pre-compression only the outer layers or only one of the outer layers are briefly damped, so that a leaching of the glue by a larger amount of steam flowing past the beaches, does not occur and is then compressed quickly to final thickness ,
  • a complete steaming of the pressed material mat with the necessary amount of heat to heat from 30 ° C to 100 ° C can be referred to in relation to the released heat of condensation of the steam, at a humidity of 5 to 6% per 1 m 2 .
  • a steam quantity of 60 to 185 g / m 2 is preferably introduced according to the invention depending on the thickness of the mat per side so that the defined amount of steam penetrates in about 30% of the pressed material mat or the amount of steam per surface in 15% depth Pressgutmatte penetrates.
  • the amount of steam introduced per side and the steam duration is the controlled variable for the process. From the amount of steam to be introduced per m 2 mat surface and the specification of the steam duration, the flow rate steam quantity per unit time [kg / h] is calculated and transferred to a flow regulator.
  • the vapor velocity is the velocity of the vapor front (condensation front), which penetrates from the surface in the direction of the center of the mat. It is calculated from the duration for heating the respective mat depth, which is to be heated. The mat depth to be heated results from the amount of steam that is to be introduced into the mat.
  • the necessary vapor pressure for a topcoat vaporization thus results from the steam duration, the amount of steam and the mat density.
  • the advantage is the separate introduction of the amount of steam on the mat top and mat base, which is also regulated differently if necessary.
  • the process parameters steam quantity and mat density can also be influenced if the gluing of the pressed material with phenolic resin takes place with a mixture of powder and liquid glue.
  • the specific compacting pressure, which sets at different OSB mat densities, is very low for mat densities between 100 to 500 kg / m 3 . In the case of the cycle presses, it has proven useful to carry out the damping during a travel control of the press in order to be able to reliably achieve a targeted mat density during the vapor deposition.
  • the so-called sieve expansion phase can be used to pre-steam the cover layers.
  • the shortening of the pressing factor according to the invention is based on a faster heating of the center of the mat to 100 ° C, two causes for the faster heating are mentioned.
  • the moisture of the outer mat layer is increased, which, like the Mattenbesprühung contributes to faster warming.
  • the outer mat part is already heated to over 100 ° C, so that less energy must be passed over Kondutation by the press plates in the mat.
  • a uniform penetration of the steam front over the entire plate width is promoted by the high flow resistance of OSB perpendicular to the mat surface and the low flow resistance parallel to mat surface.
  • Gaseous reaction accelerators or other substances such as fire-retarding insecticidal or fungicidal agents can also be introduced into the mat with the steam.
  • a particular advantage has further shown that the damping of the outer layers allowed a thickness-accurate pressure even in the multi-daylight press, since the center of the mat is not softened at the time of closing the press.
  • the conventional steam compression processes of both chip, fiber and OSB mats have hitherto been operated only on one-day cycle presses, since the specific pressing pressure drops very sharply due to complete steaming of the mat. Due to the low press back pressure, the closure of the press requires a very precise control of the press, in particular with regard to a skewed position of the press table.
  • the thickness tolerances of the plates in the individual floors are more difficult to comply with when the mat has a very low pressure counterpressure.
  • the topcoat vapor deposition according to the invention only slightly reduces the maximum specific compacting pressure (about 10-20%), so that the problems with regard to the position control of the press and the plate thickness tolerances in the individual levels do not occur.
  • Panels made of multi-daylight presses are distinguished from plates continuous pressing through a thicker pressed skin and a very low Density in the outer mat layers.
  • the topcoat vaporization according to the invention may also be used primarily for surface plasticization be used.
  • Through a surface plastification can be combined with a suitable pressing pressure a closed and smoother surface by heating and moistening the chips and strands the press be closed quickly. It is important that at the time of the high specific pressure the chips and strands at the mat surface still not dried out. Leave particularly smooth surfaces on OSB boards is uniformly thick due to thin strands (thickness less than 0.5 mm) produce.
  • the OSB boards produced in this way can be used without further measures Foils or coated papers are coated and especially in areas be used, which was previously reserved plywood.
  • the flexural strength and flexural modulus of elasticity is determined by the Topcoat vaporization also improved as the topcoats - as above described - are slightly more compacted, whereby at the same mean Density higher density in the bending outer plate zones is available.
  • the press exhaust air (press exhaust) must be certain Requirements for VOC (votive organic components) and dust loads suffice.
  • VOC volatile organic components
  • the press comes with a large suction hood provided and sucked with a large fan power the press.
  • the Costs for cleaning the large amount of exhaust air are greater than the cleaning a small amount of exhaust air, which is a higher concentration of substances having. This is particularly true when the exhaust air via an RTO - ie afterburning - is cleaned.
  • the greater part of the press exhaust a conventional pressing with a sieve pad passes during the Hot pressing process via a transport through the sieve from the plate interior on the narrow surfaces of the screen or on the end faces of the press. Just little exhaust gas passes over the narrow surfaces of the plate during the Pressing and over the plate surface after the opening of the press in the Press space.
  • the platen press according to the invention can be a particular advantage without a be equipped with extensive extraction if throughout the entire Pressing with the exception of the short evaporation time at least one Mat side, preferably the screen side, over the steam holes with 0.02 bar is sucked off.
  • the Mattenunterseite Siebseite
  • the suction already during the retraction of the Sieves are switched into the press.
  • the edge seal, as well as the vacuum Near the end of the press almost no press exhaust gas enters the hall.
  • the Plate becomes, so to speak, during the hot pressing already in the press sucked off, so the plate during the opening of the press and then only still emit very few exhaust gases.
  • the suction amounts that are sucked through the holes are much lower than a suction of the entire press.
  • the sucked off Substances consist almost exclusively of water vapor and those of wood, Adhesive and other additives such as wax released substances, so that initially a condensation of the air to clean the air Steam offers.
  • the platen press for carrying out the method according to claim 22 from one or more floors with press plates, a heater with Heating channels and with at least one steam device with Steam distribution channels and Dampfleitkanälen for the press plates, wherein the Dampfleitkanäle are equipped to the pressing surface out with steam openings and via separate channels a vacuum device and with the exception of the short Steaming a Beerabsaugsystem connected to the steam device is and the steam openings for a self-cleaning training to Pressgutmatte out with a reduction in the bore diameter of 6 mm to 3 mm are executed.
  • FIG. 1 shows a partial section of a Multi-daylight press 1 with three press plates 2, two floors 3, the Steam device with steam accumulator 8, the resulting over shut-off valves outgoing steam lines 12, a steam outlet 13 and Vacuum device 16.
  • Figures 2, 3 and 4 show the formation of a press plate. 2 with three bore levels for placement between at least one upper and a lower press plate 2.
  • Such serving as an intermediate plate Press plate 2 is in the middle with heating channels 14 and a first upper Hole level with Dampfleitkanälen 10 and a second lower Bore level executed with Dampfleitkanälen 10.
  • Dampfleitkanäle 10th Steam is from a left and a right steam distribution channel.
  • the two steam distribution channels 9 are made up of four steam inlets 15 supplied with steam and with edge strips 20 against the outside air locked.
  • For introducing steam into the pressed material mats 4 are many, distributed over the press level steam openings 11 to the Dampfleitkanälen 10th drilled.
  • Via separate channels (not shown) to the steam device a vacuum device 16 and a Heilabsaugsystem with lines for Steam outlet 13 is provided.
  • For the air extraction system is advantageous that at least on the top of the press plates 2 Beschicksiebe or stationary screens 19 are arranged.
  • the press can expediently the press material mat size be adapted thereby that the width d of the press plates 2 is not made larger than about 200 mm of the average mat width b. This can be done by decommissioning the respective Dampfleitkanäle 10 at the longitudinal edges or crates the Steam openings 11 by means of grafting (plug) done so that the Example, the evaporation surface minus two edge strips from 200 mm to 700 mm is adjustable. As shown in Figures 5 to 7 is the Pressgutmatte 4 from the outer layers 5 and 7 and the middle layer 6. Die Vapor deposition takes place only on the cover layers 5 and 7. According to FIG. 7 the sealing of the pressed material mat takes place, for example, in one A floor press 21 within the press level by an edge seal 23rd the sieves 19 and / or by a pressure gap decreasing sealing strip 22nd

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  • 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)
EP04018778A 2003-08-11 2004-08-07 Méthode et presse à plateaux simples ou multiples pour la fabrication des panneaux de fibres de bois, en particulier des panneaux OSB Withdrawn EP1508414A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10337117 2003-08-11
DE10337117A DE10337117A1 (de) 2003-08-11 2003-08-11 Verfahren und Ein- oder Mehretagenpresse zur Herstellung von Holzwerkstoffplatten, insbesondere OSB-Platten

Publications (2)

Publication Number Publication Date
EP1508414A2 true EP1508414A2 (fr) 2005-02-23
EP1508414A3 EP1508414A3 (fr) 2005-03-30

Family

ID=34042159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04018778A Withdrawn EP1508414A3 (fr) 2003-08-11 2004-08-07 Méthode et presse à plateaux simples ou multiples pour la fabrication des panneaux de fibres de bois, en particulier des panneaux OSB

Country Status (4)

Country Link
US (1) US7220375B2 (fr)
EP (1) EP1508414A3 (fr)
CA (1) CA2477211A1 (fr)
DE (1) DE10337117A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010049777A1 (de) 2010-10-29 2012-05-03 Brav-O-Tech Gmbh Befeuchtungsanlage für Pressen
WO2012056045A1 (fr) 2010-10-29 2012-05-03 Brav-O-Tech Agent d'humidification
DE102013205974A1 (de) 2013-04-04 2014-10-09 Brav-O-Tech Gmbh Flüssigkeitsauftragsanlage

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070111019A1 (en) * 2005-11-04 2007-05-17 Ainsworth Lumber Co., Ltd. Methods of manufacturing engineered wood products
CN101112765B (zh) * 2006-07-24 2013-05-29 迪芬巴赫有限两合公司 制造材料板的单层或多层压力机
WO2009118574A2 (fr) * 2008-03-24 2009-10-01 Ainsworth Lumber Co., Ltd. Procédés de fabrication de produits travaillés en bois
CA2691669A1 (fr) * 2010-02-01 2011-08-01 Chris Andersen Revetement
EP2838703B1 (fr) 2012-04-18 2019-06-12 Knauf Insulation GmbH Procédé de moulage
AT513190B9 (de) * 2012-08-08 2014-05-15 Berndorf Hueck Band Und Pressblechtechnik Gmbh Vorrichtung und Verfahren zur Plasmabeschichtung eines Substrats, insbesondere eines Pressblechs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276912B (de) * 1963-04-22 1968-09-05 Weyerhaeuser Co Verfahren und Vorrichtung zum Herstellen von Holzspankoerpern
CH463774A (de) * 1966-09-13 1968-10-15 Weyerhaeuser Co Verfahren zum Herstellen eines flachen Körpers
US4517147A (en) * 1984-02-03 1985-05-14 Weyerhaeuser Company Pressing process for composite wood panels
DE3414178A1 (de) * 1984-04-14 1985-10-24 G. Siempelkamp Gmbh & Co, 4150 Krefeld Anordnung fuer die prozessdampfverteilung beim dampfpressen von holzwerkstoffmatten
US6129871A (en) * 1996-05-31 2000-10-10 Yamaha Corporation Manufacturing method for a wood board
US6318989B1 (en) * 1998-06-23 2001-11-20 Masonite Corporation Steam injection press platen for pressing fibrous materials

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357194A (en) * 1981-04-14 1982-11-02 John Stofko Steam bonding of solid lignocellulosic material
US4393019A (en) * 1981-11-30 1983-07-12 The United States Of America As Represented By The Secretary Of Agriculture Method of pressing reconstituted lignocellulosic materials
US4850849A (en) * 1988-04-29 1989-07-25 Forintek Canada Corp. Apparatus for steam pressing compressible mat material
US4937024A (en) * 1989-06-26 1990-06-26 Borden, Inc. Method for bonding lignocellulosic material with gaseous esters
DE4441017A1 (de) * 1994-11-17 1996-05-23 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur kontinuierlichen Herstellung von Holzwerkstoffplatten
DE10101952A1 (de) * 2001-01-17 2002-07-18 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur Herstellung von Span- und Faserplatten
US7229264B2 (en) * 2004-07-28 2007-06-12 Wayne Crooks Platen with self-cleaning exhaust holes and multi-opening press utilizing same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276912B (de) * 1963-04-22 1968-09-05 Weyerhaeuser Co Verfahren und Vorrichtung zum Herstellen von Holzspankoerpern
CH463774A (de) * 1966-09-13 1968-10-15 Weyerhaeuser Co Verfahren zum Herstellen eines flachen Körpers
US4517147A (en) * 1984-02-03 1985-05-14 Weyerhaeuser Company Pressing process for composite wood panels
DE3414178A1 (de) * 1984-04-14 1985-10-24 G. Siempelkamp Gmbh & Co, 4150 Krefeld Anordnung fuer die prozessdampfverteilung beim dampfpressen von holzwerkstoffmatten
US6129871A (en) * 1996-05-31 2000-10-10 Yamaha Corporation Manufacturing method for a wood board
US6318989B1 (en) * 1998-06-23 2001-11-20 Masonite Corporation Steam injection press platen for pressing fibrous materials

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010049777A1 (de) 2010-10-29 2012-05-03 Brav-O-Tech Gmbh Befeuchtungsanlage für Pressen
WO2012056007A1 (fr) 2010-10-29 2012-05-03 Brav-O-Tech Gmbh Installation d'humidification pour presses
WO2012056045A1 (fr) 2010-10-29 2012-05-03 Brav-O-Tech Agent d'humidification
EP2632671B1 (fr) 2010-10-29 2015-03-11 Brav-O-Tech GmbH Agent d'humidification
US9186811B2 (en) 2010-10-29 2015-11-17 Brav-O-Tech Gmbh Moistening system for presses
US9192898B2 (en) 2010-10-29 2015-11-24 Bravo-O-Tech Gmbh Wetting agents
DE102010049777B4 (de) * 2010-10-29 2017-10-05 Brav-O-Tech Gmbh Befeuchtungsanlage für Pressen
DE102013205974A1 (de) 2013-04-04 2014-10-09 Brav-O-Tech Gmbh Flüssigkeitsauftragsanlage
US10035163B2 (en) 2013-04-04 2018-07-31 Brav-O-Tech Gmbh Liquid application system

Also Published As

Publication number Publication date
US7220375B2 (en) 2007-05-22
US20050082709A1 (en) 2005-04-21
DE10337117A1 (de) 2005-03-17
CA2477211A1 (fr) 2005-02-11
EP1508414A3 (fr) 2005-03-30

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