EP1769894B1 - Procédé et dispositif de préchauffage d'une nappe pour la fabrication des panneaux à base de bois - Google Patents

Procédé et dispositif de préchauffage d'une nappe pour la fabrication des panneaux à base de bois Download PDF

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Publication number
EP1769894B1
EP1769894B1 EP06020632A EP06020632A EP1769894B1 EP 1769894 B1 EP1769894 B1 EP 1769894B1 EP 06020632 A EP06020632 A EP 06020632A EP 06020632 A EP06020632 A EP 06020632A EP 1769894 B1 EP1769894 B1 EP 1769894B1
Authority
EP
European Patent Office
Prior art keywords
preheating
heating
accordance
heated
belt
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.)
Not-in-force
Application number
EP06020632A
Other languages
German (de)
English (en)
Other versions
EP1769894A2 (fr
EP1769894A3 (fr
Inventor
Gernot Von Haas
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
Application filed by Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Priority to PL06020632T priority Critical patent/PL1769894T3/pl
Publication of EP1769894A2 publication Critical patent/EP1769894A2/fr
Publication of EP1769894A3 publication Critical patent/EP1769894A3/fr
Application granted granted Critical
Publication of EP1769894B1 publication Critical patent/EP1769894B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
    • 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 for preheating a scattered Pressgutmatte in the manufacture of wood-based panels according to the preamble of patent claim 1 and an apparatus for performing the method according to claim 7.
  • a pressed material mat which consists of scattered particles such as fibers and / or chips
  • these are also used to compact a scattered pressed material mat so that excess air is removed from the pressed material mat.
  • this is desired in order to avoid that in the inlet of a continuously operating press a high compression gradient leads to high flow velocities of the displaced air leading to uncontrollable displacements of the material and thus lead to uneven density profiles in the pressed material mat; on the other hand, a uniform presetting of the parameters such as humidity and temperature is to be facilitated during pre-compression.
  • the inflow of fluids such as water vapor, air or a water vapor / air mixture is facilitated if the scattered pressed material mat has a certain degree of compaction, which prevents inflowing fluids with their flow velocities move the scattered pressed material uncontrolled.
  • a pressed material mat is formed from a forming station, which is guided through a pre-press with endlessly circulating screen belts. There, the pressed material mat is compacted by means of unheated press plates and steamed with a steamer.
  • the WO 02/076697 A1 shows a continuously operating press in which the rolling elements and / or the pressing belts can be heated or cooled independently of the pressing section.
  • the filter belts are usually cleaned in the return by means of brushes, air blow molding or water jet strips.
  • a screen belt consists for the most part of plastic, but it can also be used a metal screen.
  • the mesh size must be chosen so that the scattered particles (chips, fibers) can not fall through, but nevertheless there is sufficient gas permeability.
  • the thickness of the sieve bands is usually 1 to 3 mm.
  • a vapor / air mixture or water vapor can be used as the fluid.
  • the fluid can be flowed on both sides, ie from above and below or from only one side of the Bedüsungsplatten in the pressed material mat.
  • the inflow region of the fluid across the width is usually adapted to the requirements of the production width and the material itself.
  • the cause of the clogging is condensation in the sieve belt when passing the fluid to preheat the pressed material mat. It can then lead to caking of dust or fine particles and powdery adhesive from the outer layers of Preßgutmatte in the wire belt.
  • the water in the screen belt acts as an adhesive or collector for dust, fine particles and the like.
  • this leads to blockages of the screen belt, since the adhesive cures in the screen belt. It may even come to the formation of built-up edges (known from metal cutting machining), which leave impressions with their tips in the pressed material, which are still visible after the final pressing.
  • the condensed water in the sieve can also drip on the Preßgutmatte and lead to water marks only on the pressed material and thus on the produced wood-based panel itself. This wood-based panel is then broke and must be discarded during visual inspection. However, since small water spots can be overlooked during the visual inspection of a wood-based panel several square meters in size, this can lead to the delivery of defective goods and the corresponding loss of image of the producer.
  • the object of the present invention is to develop a method for preheating a pressed material mat and a device for carrying out the method, which eliminates the above-mentioned disadvantages and thus prevents sticking by condensed water in the screen belts in connection with foreign substances or adhesive and furthermore the occurrence of Water spots on the finished wood-based panel avoids.
  • the object of the method is achieved in that the screen belts are brought to an approximately equal to or higher than the condensation temperature of the fluid used for preheating before entering the area of the fluid supply.
  • the object of the device for carrying out the method is achieved in that heating means for heating the screen belts is arranged in front of the Bedüsungsplatten.
  • the Siebband temperature is raised before the entry of the wire into the Bedüsungs Surrey the preheater so that it is greater than or equal to the condensation temperature of the fluid. If screen belt preheating is not performed, condensation of the fluid in the screen belts occurs at a wire belt temperature below 100 ° C (when using a water vapor mixture) or when using steam-air mixture below the dew point , The condensation does not stop until the screen belt has been heated above the dew point or above the boiling point (approx. 100 ° C) with water vapor. For example, condenses on 1 m 2 filter belt made of plastic about 30 g of water when heated from 40 ° to 100 ° C.
  • the screen belt remains dry in the region of the injection of the fluid, blockage of the screen belt by adhesive and dust no longer occurs because there is no water for bonding adhesive and dust in the screen belt.
  • the mat preheating can be carried out safely. Water stains on the plates are avoided.
  • the belt in the belt return line cools to 30 ° - 70 ° C.
  • a passive heat tunnel can be arranged in the return of the screen belts.
  • FIG. 1 shows the schematic structure of a production plant for wood-based panels with a scattered on a forming belt 1 by means of a forming station 10 Pressgutmatte (not shown), which can then be introduced into the preheater.
  • the pressed material mat is taken over by the screen belts 2 and 3 and pulled through the preheater.
  • the pressed material mat is heated by means of a hot fluid exiting from the spraying plates 5, for example a water vapor / air mixture.
  • the spraying plates 5 for example a water vapor / air mixture.
  • they are in front of the Bedüsungsplatten. 5 heated by means of heating plates 4, which have a temperature of 90 ° to 200 ° C.
  • a continuous press 7 or a clock press is passed to perform the necessary compaction and curing in a wood-based panel.
  • the sieve belts are otherwise cleaned in the return by means of a cleaning device 9. Preferably, this is done immediately after the deflection to facilitate the cleaning.
  • a cleaning device 9 Preferably, this is done immediately after the deflection to facilitate the cleaning.
  • heated deflecting drums 6 instead of the heating plates 4.
  • the deflection drums 6 can be heated, for example, with steam or thermal oil, so that sufficient heat energy can be transmitted to the screen belts 2 and 3.
  • a combination of both heaters is conceivable, wherein the respective screen belt is heated to a temperature above 90 ° C.
  • a heat tunnel 8 is arranged in the return of the preheating.
  • This can be either active (heating) or passive (insulating).
  • the screen belts can already be preheated for a start-up operation and thus support the other heating devices.

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)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Claims (12)

  1. Processus pour le préchauffage continu d'un tapis de matière à presser lors de la fabrication continue de panneaux dérivés du bois, mais notamment pour la fabrication de panneaux à copeaux/fibres par lequel un tapis de matière à presser doté d'un liant est formé d'un mélange initial de copeaux et/ou fibres provenant d'un poste de moulage (10) sur une bande de moulage à déplacement continu, ce tapis étant tranformé en la forme finale et durci dans la presse principale après un préchauffage et une précompression éventuelle entre le poste de moulage (10) et la presse principale en appliquant une pression et de la chaleur,
    caractérisé en ce que
    des bandes de tamisage (2, 3) sont amenées, dans la zone du préchauffage avant l'entrée dans la zone d'une alimentation en fluide, à une température environ identique ou supérieure à la température de condensation du fluide utilisé pour le préchauffage.
  2. Le processus en accord avec la revendication 1
    caractérisé en ce que la bande de tamisage respective (2, 3) est réchauffée à une température supérieure à 90 °C.
  3. Le processus en accord avec la revendication 1
    caractérisé en ce que
    pour le chauffage de la bande de tamisage respective (2, 3) avant l'entrée dans la zone d'une alimentation en fluide, celle-ci est tirée à travers une plaque chauffante (4) ayant une température de 90 °C à 200 °C.
  4. Le processus en accord avec la revendication 1
    caractérisé en ce que pour le chauffage de la bande de tamisage respective (2, 3) avant l'entrée dans la zone d'une alimentation en fluide, celle-ci est retournée et chauffée au moyen d'une poulie de renvoi (6).
  5. Le processus en accord avec la revendication 1 caractérisé en ce que
    pour la conservation de la chaleur, la bande de tamisage respective (2, 3) est tirée, en retour, à travers un tunnel thermique isolant et donc passif (8).
  6. Le processus en accord avec la revendication 1
    caractérisé en ce que pour assister au chauffage, la bande de tamisage respective (2, 3) est réchauffée en retour en plus dans un tunnel thermique activement chauffé (8).
  7. Dispositif pour le préchauffage d'un tapis de matière à presser répandu en continu avant l'entrée dans une presse continue (7) ou une presse à alimentation intermittente comportant une ou deux bandes de tamisage perméables au gaz et tournant en continu (2, 3) et des plaques de buses (5) disposées en haut et/ou en bas.
    caractérisé en ce que pour le chauffage de la bande de tamisage respective (2, 3), un ou plusieurs dispositifs de chauffage (4, 6) sont disposés en amont des plaques de buses.
  8. Le dispositif pour le préchauffage en accord avec la revendication 7,
    caractérisé en ce que le dispositif de chauffage est constitué d'une plaque chauffante (4).
  9. Le dispositif pour le préchauffage en accord avec la revendication 7,
    caractérisé en ce que le dispositif de chauffage est constitué d'une poulie de renvoi chauffée (6).
  10. Le dispositif pour le préchauffage en accord avec la revendication 7,
    caractèrisé en ce que
    un chauffage pour les plaques de buses (5) est mis en place.
  11. Le dispositif pour le préchauffage en accord avec la revendication 7,
    caractérisé en ce que
    un tunnel thermique (8) activement chauffé est disposé en plus dans le retour des bandes de tamisage (3, 4) pour assister au chauffage.
  12. Le dispositif pour le préchauffage en accord avec la revendication 7.
    caractérisé en ce que un tunnel thermique (8) isolé est disposé en plus dans le retour des bandes de tamisage (3,4) pour conserver la chaleur.
EP06020632A 2005-09-29 2006-09-29 Procédé et dispositif de préchauffage d'une nappe pour la fabrication des panneaux à base de bois Not-in-force EP1769894B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06020632T PL1769894T3 (pl) 2005-09-29 2006-09-29 Sposób i urządzenie do podgrzewania rozprowadzonej maty z materiału prasowanego w produkcji płyt z tworzywa drzewnego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005046879A DE102005046879A1 (de) 2005-09-29 2005-09-29 Verfahren und Vorrichtung zur Vorwärmung einer gestreuten Pressgutmatte bei der Herstellung von Holzwerkstoffplatten

Publications (3)

Publication Number Publication Date
EP1769894A2 EP1769894A2 (fr) 2007-04-04
EP1769894A3 EP1769894A3 (fr) 2009-08-05
EP1769894B1 true EP1769894B1 (fr) 2011-11-16

Family

ID=37136526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06020632A Not-in-force EP1769894B1 (fr) 2005-09-29 2006-09-29 Procédé et dispositif de préchauffage d'une nappe pour la fabrication des panneaux à base de bois

Country Status (4)

Country Link
EP (1) EP1769894B1 (fr)
AT (1) ATE533603T1 (fr)
DE (1) DE102005046879A1 (fr)
PL (1) PL1769894T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2667757C1 (ru) * 2014-11-06 2018-09-24 Флуринг Текнолоджис Лтд. Плита из древесного материала, в частности, в виде древесно-пластикового композитного материала, и способ ее изготовления

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT3017924T (pt) * 2014-11-06 2017-03-30 Flooring Technologies Ltd Processo para a produção de uma placa de derivados de madeira, em particular de um compósito de madeira e plástico
CN109203130B (zh) * 2018-11-05 2023-10-03 万华生态板业股份有限公司 一种热压机系统及板材加工系统
DE102019114016B4 (de) * 2019-05-24 2021-02-18 Siempelkamp Maschinen- Und Anlagenbau Gmbh Verfahren und Vorrichtung zur Erwärmung einer Pressgutmatte
DE102019114021B3 (de) * 2019-05-24 2020-11-12 Siempelkamp Maschinen- Und Anlagenbau Gmbh Verfahren und Vorrichtung zur Vorwärmung einer Pressgutmatte
CN111923183B (zh) * 2020-08-14 2022-03-29 惠州市瀚鑫新材料有限公司 一种纤维板加工用烫平装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3640682A1 (de) * 1986-11-28 1988-06-09 Baehre & Greten Verfahren und vorrichtung zum kontinuierlichen vorwaermen eines vlieses fuer die herstellung von span-, faser- oder dergleichen platten
DE3734180C2 (de) * 1987-10-09 1998-01-29 Kuesters Eduard Maschf Doppelbandpresse zur Herstellung von Holzspanplatten und dergleichen
DE4423632A1 (de) * 1994-07-06 1996-01-11 Siempelkamp Gmbh & Co Verfahren zum Vorwärmen von Streugut auf eine vorgebbare Vorwärmtemperatur im Zuge der Herstellung von Holzwerkstoffplatten
DE19701596C2 (de) * 1996-02-15 1999-03-18 Siempelkamp Gmbh & Co Verfahren und Anlage zum Vorwärmen von Preßgutmatten aus beleimtem Preßgut
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
DE20209991U1 (de) * 2002-06-28 2003-10-30 Metso Paper Inc Doppelbandpresse zur Herstellung von Plattenwerkstoffen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2667757C1 (ru) * 2014-11-06 2018-09-24 Флуринг Текнолоджис Лтд. Плита из древесного материала, в частности, в виде древесно-пластикового композитного материала, и способ ее изготовления

Also Published As

Publication number Publication date
DE102005046879A1 (de) 2007-04-05
EP1769894A2 (fr) 2007-04-04
EP1769894A3 (fr) 2009-08-05
ATE533603T1 (de) 2011-12-15
PL1769894T3 (pl) 2012-04-30

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