EP1661677B1 - Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten - Google Patents

Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten Download PDF

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Publication number
EP1661677B1
EP1661677B1 EP05025693.2A EP05025693A EP1661677B1 EP 1661677 B1 EP1661677 B1 EP 1661677B1 EP 05025693 A EP05025693 A EP 05025693A EP 1661677 B1 EP1661677 B1 EP 1661677B1
Authority
EP
European Patent Office
Prior art keywords
mat
steaming
steam
iii
sector
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
Application number
EP05025693.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1661677A1 (de
Inventor
Gernot Dr. Von Haas
Detlef Kroll
Ekkehard Brommer
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 Maschinen und Anlagenbau
Original Assignee
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
Priority claimed from DE102004057418.9A external-priority patent/DE102004057418B4/de
Application filed by Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Priority to SI200531871T priority Critical patent/SI1661677T1/sl
Priority to PL10012499T priority patent/PL2275239T3/pl
Priority to EP10012499.9A priority patent/EP2275239B1/de
Priority to PL05025693T priority patent/PL1661677T3/pl
Publication of EP1661677A1 publication Critical patent/EP1661677A1/de
Application granted granted Critical
Publication of EP1661677B1 publication Critical patent/EP1661677B1/de
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
    • 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

Definitions

  • the invention relates to a method according to claim 1 for introducing steam into a mat or in the outer layers of a mat consisting of a mixture of lignocellulosic and / or cellulose-containing particles, such as chips, fibers, plastics or chips, mixed with or without binder in the production Particleboard and a device according to claim 15 for carrying out the method.
  • the application means by a "mat” a mixture of lignocellulosic and / or cellulosic particles, such as shavings, fibers or chips, dispersed with or without binder, which can be scattered in several layers and with different orientations.
  • Such mats are usually used in continuous production processes for chipboard (MDF) or chipboard (OSB), but can also be used in discontinuous processes. These mats are usually pressed in continuous processes with a continuous double belt press and cured.
  • Subject of this application is the introduction of steam into the mat or due to the process only in the respective outer layers of a mat during precompression before a continuous main press or during the main pressing itself. In addition to the introduction of steam into the mat and the evaporation of different width mats is a problem solved shall be.
  • the steam channels are closed at the edge of the mat by retracting cylinders in the edge area.
  • the steaming width within a duct is thus set according to the width of the mat and the steam losses at the edge, with basically virtually the entire width of the mat being steamed per duct.
  • the length of the evaporation zone (seen in the feed direction) is set according to the density profile. The length of the evaporation zone is controlled by switching on individual channels.
  • the DE 101 61 341 A1 becomes describes a device that allows the method described above, a vapor deposition, but the width adjustment and the edge shutdown is achieved by turning correspondingly continuous cylinders.
  • DE 44 41 017 A1 (Excretion: DE 44 47 847 ) describes a device by means of which a top layer vapor deposition is to take place.
  • the mat narrow surface is sealed by means of telescopic plates, whereby steam leakage losses are to be avoided.
  • boxes which run across the width of the mat transverse to the feed direction are used.
  • the cause of the uneven vapor deposition across the full mat width and mat depth of the processes described above is that the air present in the mat, which is a flow resistance to the penetrating vapor, can not escape evenly during vapor deposition.
  • the incoming steam is thus counteracted by a high back pressure in the center of the mat, which is not so pronounced at the edge of the mat, since the open narrow side of the mat is open here and the air can escape. Therefore, at the same pressure, the steam penetrates deeper over the cross-section at the edge than in the center of the mat. As a result, so the process of vapor deposition or the Deck Anlagenmpfung with the described devices unsatisfactory possible.
  • the object and the object of the invention is to further develop the process for covering the surface so that a uniform density profile over the entire width of the plate can be increased and the process of simultaneously introducing steam from above and below to heat the full width of the mat so that a uniform heating of the entire mat or the cover layers over both the width and the thickness is possible.
  • This object of the invention is achieved according to claim 1, characterized in that the steaming of the mat starts over a length initially in the center of the mat and then widens wedge-shaped during the production progress to the longitudinal edges of the mat.
  • the advantage here is that the vapor deposition surface is divided into different Dampfungsfelder, wherein both in the transverse and in the longitudinal direction several fields "checkerboard" may be present. Due to the variable and controllable control of these fields individually or in groups, different evaporation modes for the entire mat depth or only the outer layers can be controlled. Particularly advantageous is the wedge-shaped vapor deposition or an alternating vapor deposition.
  • the vapor pressure in the individual chambers can be set differently (more vapor pressure in the center of the mat than in the marginal chambers). With these measures, a uniform heating of both the outer layers across the width as well as a complete heating is possible. As a further point, more steam (lower to the middle of the mat) can be targeted in the middle of the mat (seen across the width) present condensation front), which can solve the known problem of low transverse forces in the center of the plate here.
  • FIG. 1 shows the top view of the arranged above a Pressgutmatte pressure chamber fields in the working direction (AR) of the press manufacturing plant without steaming.
  • the arrow of the working direction points to the inlet side of the Bedampfungsumble G.
  • the Pressgutmatte can be compressed in addition, for example, when using the method in a pre-press or main press in the working direction.
  • To FIG. 2 now becomes a wedge-shaped Steaming switched in the direction of work, which causes the air is successively pushed from the middle of the mat II to the mat side II-II and III-III and replaced by steam.
  • a complete flow with displacement of the air can be carried out, or a pure cover layer vaporization with appropriate cover layer preheating.
  • the sheets produced which were preheated by this method, have uniform vertical density profiles both at the edge and in the center of the mat II.
  • the plate properties correlated with the density profile, such as the bending strength, are at the edges II-II and III-III are the same size as in Matt Center II.
  • the press speed can be significantly increased compared to the above-mentioned methods, since the heating of the middle layer to the curing temperature of the adhesive of about 100 ° C in the hot press in Mattenmitte II takes place at the same time as at the mat edge II-II and III-III.
  • the air displacement and thus the uniform vapor deposition can be further supported by the fact that in the center of the mat I-I a higher vapor pressure is set than at the mat edge II-II and III-III. Furthermore, it is still possible to set a different vapor pressure via the steaming section G of the steaming. For example, a lower vapor pressure in the center of the mat I-I is used for the topcoat vapor deposition in the rear area of the vaporization zone G (approximately from d or e) so that the vapor front does not penetrate deeper than at the mat edge II and III.
  • the vapor deposition is performed wedge-shaped so that 20% of the mat width g in mat center II not 20% on the Bedampfungsumble G but 40% on the Bedampfungsorder G of steaming are performed.
  • the classification can be used from the above example but using a higher vapor pressure at mid-mat II than at edges II-II and III-III.
  • the outer Bedampfungsfelder at the edges II-II and III-III under which there is no material in a narrow mat can be switched off to avoid unnecessary steam consumption.
  • the device is designed so that the vapor deposition surface is subdivided into different vapor deposition fields, wherein both transverse (v, w, x, y, z) and longitudinal (a, b, c, d, e, f) any number of fields for a checkerboard-like appearance can be distributed. Due to the variable shutdown and controllable control with regard to the vapor pressure or the steam quantity of these fields individually or in groups, different vaporization zones can be controlled with regard to the vapor deposition pressure or the amount of vapor deposition across the mat.
  • FIG. 4 is a schematic side view shown in the already sufficient as it can be seen that a mat 2 on a conveyor belt 1 is guided in the working direction by an array of pressure chambers 3 above and below.
  • the conveyor belt 1 is usually designed as a sieve belt and thus vapor-permeable.
  • Such a device is usually used in a pre-press for precompression and adjustment of various parameters in front of a continuously operating double belt press application.
  • a heater 4 is disposed above the mat 2. This is to prevent condensation from taking place in the pressure chambers 3 themselves, and thus drops of water from falling onto the mat 2.

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)
  • Treatment Of Fiber Materials (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP05025693.2A 2004-11-27 2005-11-24 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten Expired - Lifetime EP1661677B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SI200531871T SI1661677T1 (sl) 2004-11-27 2005-11-24 Postopek in naprava za uvajanje pare v podlogo, zlasti v pokrivne plasti
PL10012499T PL2275239T3 (pl) 2004-11-27 2005-11-24 Sposób i urządzenie do wprowadzania pary do maty lub jej warstw wierzchnich
EP10012499.9A EP2275239B1 (de) 2004-11-27 2005-11-24 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten
PL05025693T PL1661677T3 (pl) 2004-11-27 2005-11-24 Sposób i urządzenie do wprowadzania pary w matę bądź w jej warstwy wierzchnie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004057418.9A DE102004057418B4 (de) 2004-11-27 2004-11-27 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten
DE102005053981.5A DE102005053981B4 (de) 2004-11-27 2005-11-13 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP10012499.9A Division EP2275239B1 (de) 2004-11-27 2005-11-24 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten
EP10012499.9A Division-Into EP2275239B1 (de) 2004-11-27 2005-11-24 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten

Publications (2)

Publication Number Publication Date
EP1661677A1 EP1661677A1 (de) 2006-05-31
EP1661677B1 true EP1661677B1 (de) 2014-05-07

Family

ID=35594503

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05025693.2A Expired - Lifetime EP1661677B1 (de) 2004-11-27 2005-11-24 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten
EP10012499.9A Expired - Lifetime EP2275239B1 (de) 2004-11-27 2005-11-24 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10012499.9A Expired - Lifetime EP2275239B1 (de) 2004-11-27 2005-11-24 Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten

Country Status (6)

Country Link
EP (2) EP1661677B1 (pl)
CN (1) CN101817197B (pl)
DE (1) DE102005053981B4 (pl)
ES (2) ES2471382T3 (pl)
PL (2) PL2275239T3 (pl)
SI (2) SI1661677T1 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11904496B2 (en) 2017-04-25 2024-02-20 SWISS KRONO Tec AG Process for the production of OSB wood-based boards with reduced emission of volatile organic compounds (VOCs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2213432A1 (en) * 2009-01-29 2010-08-04 Imal S.R.L. Apparatus for humidifying mats based on loose wood material

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914106A1 (de) * 1989-04-28 1990-10-31 Siempelkamp Gmbh & Co Verfahren und anlage zur kontinuierlichen herstellung von spanplatten, faserplatten u. dgl.
DE4441017A1 (de) * 1994-11-17 1996-05-23 Dieffenbacher Gmbh Maschf Verfahren und Anlage zur kontinuierlichen Herstellung von Holzwerkstoffplatten
DK176116B1 (da) * 1997-03-18 2006-08-14 Wesser & Dueholm Fremgangsmåde til fremstilling af spånplader, fiberplader og lignende
US6187234B1 (en) * 1998-06-23 2001-02-13 Masonite Corporation Method for steam pressing composite board having at least one finished surface
US6318989B1 (en) * 1998-06-23 2001-11-20 Masonite Corporation Steam injection press platen for pressing fibrous materials
DE10114381A1 (de) * 2001-03-23 2002-10-10 Metso Paper Inc Verfahren zur kontinuierlichen Herstellung von Holzspanplatten und ähnlichen bahnförmigen Plattenwerkstoffen und dafür geeignete Doppelbandpresse
DE10161341A1 (de) 2001-12-13 2003-06-26 Dieffenbacher Gmbh Maschf Bedampfungsvorrichtung für Preßgutmatten
DE102004057418B4 (de) * 2004-11-27 2017-08-31 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zum Einleiten von Dampf in eine Matte bzw. in deren Deckschichten

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11904496B2 (en) 2017-04-25 2024-02-20 SWISS KRONO Tec AG Process for the production of OSB wood-based boards with reduced emission of volatile organic compounds (VOCs)

Also Published As

Publication number Publication date
PL1661677T3 (pl) 2014-09-30
DE102005053981A1 (de) 2007-05-16
EP2275239A2 (de) 2011-01-19
EP2275239B1 (de) 2014-03-12
SI1661677T1 (sl) 2014-09-30
DE102005053981B4 (de) 2018-01-11
CN101817197A (zh) 2010-09-01
EP1661677A1 (de) 2006-05-31
CN101817197B (zh) 2014-07-02
EP2275239A3 (de) 2012-10-31
SI2275239T1 (sl) 2014-07-31
ES2471382T3 (es) 2014-06-26
ES2489519T3 (es) 2014-09-02
PL2275239T3 (pl) 2014-08-29

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