EP2388117A1 - Procédé et installation de fabrication d'une plaque en fibres de bois - Google Patents

Procédé et installation de fabrication d'une plaque en fibres de bois Download PDF

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Publication number
EP2388117A1
EP2388117A1 EP10005152A EP10005152A EP2388117A1 EP 2388117 A1 EP2388117 A1 EP 2388117A1 EP 10005152 A EP10005152 A EP 10005152A EP 10005152 A EP10005152 A EP 10005152A EP 2388117 A1 EP2388117 A1 EP 2388117A1
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EP
European Patent Office
Prior art keywords
wood
cake
press
impregnating medium
impregnating
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Withdrawn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
EP10005152A
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German (de)
English (en)
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.)
Flooring Technologies Ltd
Original Assignee
Flooring Technologies Ltd
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 Flooring Technologies Ltd filed Critical Flooring Technologies Ltd
Priority to EP10005152A priority Critical patent/EP2388117A1/fr
Publication of EP2388117A1 publication Critical patent/EP2388117A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B27N1/02—Mixing the material with binding agent
    • 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 and plant for producing a wood-based panel, in particular a wood fiber board, are sprinkled with an adhesive wetted wood fibers or wood chips on an endlessly circulating conveyor belt to a cake, the cake of wood fibers or wood chips in a transport direction T to various processing stations promoted, compressed in a pre-press and then pressed under pressure and temperature influence in a hot press to a plate of desired thickness.
  • Such a method is for example from the DE 10 2005 033 687 A1 known.
  • long fibers In order to produce an MDF or HDF board according to this method, long fibers must first be produced in a defibration step, which can be done in an upstream process or immediately before the plant for producing the wood fiber boards. The coarse, long wood fibers are then applied with additives, such as flame retardants and water repellents. Subsequently, binder (urea-formaldehyde glue) is added via a blowline and the fibers are then dried with appropriate additives and the fiber sizing via a power tube dryer. Subsequently, the fiber mixture is sprinkled on a spreading device to an endless cake on the endless circulating conveyor belt.
  • additives such as flame retardants and water repellents.
  • binder urea-formaldehyde glue
  • the loosely sprinkled mixed fiber cake is then fed from the conveyor belt to a cold pre-press and cold pre-compaction of the fiber web is achieved. Subsequently, the nonwoven fabric is fed back via the conveyor belt of a continuous hot press, in which it to a Plate of desired thickness is hot pressed.
  • the press belts are advantageously coated with a release agent to prevent adhesion of the plates formed.
  • the endlessly produced plates are then formatted and separated into individual plates and then assembled.
  • MDF Medium Density Fiberboard
  • HDF High Density Fiberboard
  • properties may be, for example, the conductivity that is involved or desired for a fiberboard either in powder coating the panel itself or when the panel is to be used as a laminate flooring panel support and the flooring must have antistatic properties.
  • the conductivity can be achieved by adding salts in the manufacturing process, for example in the refining process.
  • Another desired property may be a fire retardant design.
  • the EP 1 710 061 A1 discloses a method for continuously preheating a mat or mat. This steam is introduced into a mat of scattered wood chips or chips. This distributes itself within the mat and heats it up.
  • the DE 20 50 530 A1 discloses a method of impregnating preformed sounding material with a binder.
  • the Beschalungsmaterial consists of porous plates, on one surface of the binder is applied. The opposite surface is then subjected to a negative pressure, whereby the binder is pulled into the openings of the porous plate.
  • the plates produced by the methods described above are subsequently further refined, for example by providing them with a decorative layer and a protective layer covering the decoration. These panels can then be further processed for example to furniture panels or wall, ceiling or floor panels.
  • the decorative layer and the protective layer are laid on the previously prepared core, and then the core and the laid-up layers are pressed together (laminated) in a hot press.
  • their press skin which is also referred to as press-patina or rotting layer, must be sanded before the decorative layer and the protective layer are applied, because in this area the heat input during hot pressing is so high that the adhesive Cures too quickly, which glue bridges at least partially break and make the layer vulnerable.
  • the press skin is usually abraded by about 0.3 mm.
  • the plates are made stronger than they are needed, which not only adversely affects the cost.
  • the invention is therefore based on the problem described starting the task of specifying a resource-saving method for producing a direct-print wood-based panel.
  • a generic method is characterized in that from the top of the cake from wood chips or wood fibers on the conveyor belt in front of the hot press vacuum impregnated an impregnating medium is applied, which is crosslinked during pressing.
  • This impregnation medium prevents the formation of a press skin, so that the top of the prefabricated plate no longer needs to be sanded before the decorative layer is placed or printed, which not only results in material savings on wood material, but the manufacturing costs are also reduced by eliminating handling time, which was previously necessary for the grinding process for grinding the press skin, and also eliminates the cost of the abrasive belts.
  • the impregnation medium influences the plate surface properties, such as strength, swelling behavior, and suction behavior before or during training, so that these measures no longer have to be taken during the subsequent finishing.
  • the impregnation medium is applied to the chip or fiber cake behind the pre-press.
  • the impregnating medium can be applied or sprinkled, for example by means of rollers, when it is firmly in particle form.
  • the impregnating medium is preferably made of melamine resins in a proportion of 4 - 30%, particularly preferably 20% melamine. However, it may also consist of urea-formaldehyde resins with a low molar ratio of urea to formaldehyde of 1: ⁇ 1. Also, highly buffered condensation resins with urea or hexamine can be used for the impregnation medium.
  • the impregnation medium can be liquid or powdery.
  • the impregnation medium is liquid, it can be sprayed onto the fiber cake by means of nozzles or rollers.
  • the device for applying the impregnation medium can be arranged stationary, which simplifies the construction of the production line and reduces its cost.
  • the impregnation is applied at least partially.
  • areas are created with / without impregnation (tempering), the tempered areas having deviating properties in relation to non-tempered areas.
  • the impregnation medium can for example also influence the water absorption capacity of the finished pressed wood-based panel.
  • the single figure shows the schematic arrangement of the individual components of the system.
  • the chipper 12 the wood fibers or shavings are first prepared and, before they are dried in the drier 10, wet-glued at the point marked 11. After drying, the fibers or chips are glued again at the point marked 9 and then fed to the scattering station 8.
  • the scattering station 8 the preferably glued with a urea-formaldehyde resin or melamine resin fibers or chips are sprinkled onto the endless in the direction of transport T driven conveyor belt 7 to a cake 6.
  • the pre-press 4 the cake 6 is compressed, so cold pre-compressed.
  • an impregnation station 3 is integrated, which consists of an over the conveyor belt 7phragaggregat, such as nozzles, consists.
  • the application unit is stationary and immovable.
  • an impregnating agent between the pre-press 4 and the hot press 2 is applied.
  • a particulate impregnating agent is used, it is also possible to sprinkle it on the upper side of the cake 6 in an impregnating station 5 arranged stationary in front of the pre-press 4.
  • an impregnating agent before the pre-compaction, the impregnating medium before the Sprinkle scattering station 8 on the conveyor belt 7 and then to scatter the fibers or chips.
  • the impregnating agent can be applied fully or partially and also penetrate at different depths into the cake 6.
  • the impregnating agent consists of a thermally postcrosslinking substance and is applied to the cake 6 immediately before pressing.
  • Parallel to the conveyor belt 7 laterally arranged - not shown here - sheets can be provided to ensure that the scattered cake 6 is maintained in its shape when it is transported.
  • On the surface of the wood-based panel 1 can be directly gefillert / printed.
  • the impregnation station 3, 5 preferably consists of an applicator unit arranged above the conveyor belt 7 for an impregnating medium.
EP10005152A 2010-05-17 2010-05-17 Procédé et installation de fabrication d'une plaque en fibres de bois Withdrawn EP2388117A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10005152A EP2388117A1 (fr) 2010-05-17 2010-05-17 Procédé et installation de fabrication d'une plaque en fibres de bois

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10005152A EP2388117A1 (fr) 2010-05-17 2010-05-17 Procédé et installation de fabrication d'une plaque en fibres de bois

Publications (1)

Publication Number Publication Date
EP2388117A1 true EP2388117A1 (fr) 2011-11-23

Family

ID=42807003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10005152A Withdrawn EP2388117A1 (fr) 2010-05-17 2010-05-17 Procédé et installation de fabrication d'une plaque en fibres de bois

Country Status (1)

Country Link
EP (1) EP2388117A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2050530A1 (en) 1970-01-29 1971-08-05 Nat Gypsum Co Impregnating porous board with binding agent
EP0548758A1 (fr) * 1991-12-20 1993-06-30 Bison-Werke Bähre & Greten GmbH & Co. KG Panneau et procédé pour sa fabrication
DE19963203A1 (de) 1999-12-27 2001-09-20 Kunnemeyer Hornitex Verfahren zum Herstellen von plattenförmigen Holzwerkstoffen und Platte aus Holzwerkstoff
EP1323509A1 (fr) * 2001-12-20 2003-07-02 Maschinenfabrik J. Dieffenbacher GmbH & Co. Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques
DE10314974A1 (de) * 2003-04-02 2004-10-21 Glunz Ag Verfahren zur Herstellung von Formkörpern mit einer zusammenhängende lignocellulosehaltige Fasern aufweisenden formgebenden Struktur und Formkörper
EP1710061A1 (fr) 2005-04-08 2006-10-11 Dieffenbacher GmbH & Co. KG Méthode de préchauffage en continu d'un mat ou d'une natte, et installation utilisé
US20060240139A1 (en) * 2001-02-09 2006-10-26 Georgia-Pacific Resins, Inc. Method and Apparatus for Introducing an Additive to a Composite Panel
DE102005033687A1 (de) 2005-07-19 2007-01-25 Steico Ag Holzfaserplatte und Verfahren zur Herstellung einer Holzfaserplatte
US20070122644A1 (en) * 2005-11-29 2007-05-31 Timtek Australia Pty, Ltd. System and Method For The Preservative Treatment of Engineered Wood Products

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2050530A1 (en) 1970-01-29 1971-08-05 Nat Gypsum Co Impregnating porous board with binding agent
EP0548758A1 (fr) * 1991-12-20 1993-06-30 Bison-Werke Bähre & Greten GmbH & Co. KG Panneau et procédé pour sa fabrication
DE19963203A1 (de) 1999-12-27 2001-09-20 Kunnemeyer Hornitex Verfahren zum Herstellen von plattenförmigen Holzwerkstoffen und Platte aus Holzwerkstoff
US20060240139A1 (en) * 2001-02-09 2006-10-26 Georgia-Pacific Resins, Inc. Method and Apparatus for Introducing an Additive to a Composite Panel
EP1323509A1 (fr) * 2001-12-20 2003-07-02 Maschinenfabrik J. Dieffenbacher GmbH & Co. Procédé pour la fabrication en continu de panneaux en fibres lignocellulosiques
DE10314974A1 (de) * 2003-04-02 2004-10-21 Glunz Ag Verfahren zur Herstellung von Formkörpern mit einer zusammenhängende lignocellulosehaltige Fasern aufweisenden formgebenden Struktur und Formkörper
EP1710061A1 (fr) 2005-04-08 2006-10-11 Dieffenbacher GmbH & Co. KG Méthode de préchauffage en continu d'un mat ou d'une natte, et installation utilisé
DE102005033687A1 (de) 2005-07-19 2007-01-25 Steico Ag Holzfaserplatte und Verfahren zur Herstellung einer Holzfaserplatte
US20070122644A1 (en) * 2005-11-29 2007-05-31 Timtek Australia Pty, Ltd. System and Method For The Preservative Treatment of Engineered Wood Products

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