EP1880816B1 - Procédé destiné à déformer une zone de plaques en matériau dérivé du bois et dispositif correspondant - Google Patents

Procédé destiné à déformer une zone de plaques en matériau dérivé du bois et dispositif correspondant Download PDF

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Publication number
EP1880816B1
EP1880816B1 EP07013583.5A EP07013583A EP1880816B1 EP 1880816 B1 EP1880816 B1 EP 1880816B1 EP 07013583 A EP07013583 A EP 07013583A EP 1880816 B1 EP1880816 B1 EP 1880816B1
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EP
European Patent Office
Prior art keywords
edge area
moulding
water
moulded
edge
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
EP07013583.5A
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German (de)
English (en)
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EP1880816A2 (fr
EP1880816A3 (fr
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
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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.)
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Publication date
Application filed by Flooring Technologies Ltd filed Critical Flooring Technologies Ltd
Priority to PL07013583T priority Critical patent/PL1880816T3/pl
Publication of EP1880816A2 publication Critical patent/EP1880816A2/fr
Publication of EP1880816A3 publication Critical patent/EP1880816A3/fr
Application granted granted Critical
Publication of EP1880816B1 publication Critical patent/EP1880816B1/fr
Not-in-force 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity

Definitions

  • the invention relates to a method according to claim 1 for forming a range of wood-based panels and a device according to claim 6 therefor.
  • Such continuous processes and the corresponding devices are used in the manufacture of ceiling, wall or floor panels.
  • wood-based materials for example, high-density or medium-density fiberboard are used, in the processing of which the side surfaces are profiled into panels.
  • the profiling of the side surfaces creates sharp edges that interfere with subsequent processing, or that are undesirable for optical reasons. These sharp-edged sections must either be crushed by means of a material-removing process or smoothed by means of a forming process. The resulting chamfered bevels are usually perceived as visually appealing.
  • the bevels are produced by milling, there are disadvantages.
  • the structural connection of the wood-based material is reduced by the engagement of the milling cutter.
  • the exposed base material must subsequently be laboriously sealed against moisture.
  • the exposed base material has a deviating from the remaining surface of the wood material, in particular of a decorative surface color.
  • the EP 1 086 791 proposes to heat the reshaped area of the wood material and the forming tool with hot air and then to achieve the desired deformation by a relative movement between the workpiece and the tool.
  • a disadvantage of this type of processing of the surface is the very low heat input per unit time, so that can be achieved with such an arrangement only low operating speeds.
  • An increase in the contact temperature is not unlimited, as it can cause burns at too high temperatures.
  • the device cost is very high, as to avoid heat loss, an enclosure o. ⁇ . Is provided. It is also to be expected with a very high energy consumption, since the heated air from the smooth workpiece surface reflects rather than absorbed and implemented.
  • the GB 1 510 412 Dresser Corporation plans to wet fiberboards with hot water. Subsequently, the fiber boards are pressed stationary in a profiled hot press. A "preheating" of the plate is done solely by adjusting the water temperature.
  • the MDF Incorporated describes in the GB 2 364 268 Moistening finished MDF boards with steam or spraying fiberboards with water followed by heating by microwave or infrared radiation. The so moistened and heated plates are transferred to a hot press and deformed stationary to profiled door cover sheets.
  • the WO87 / 005956 describes the deformation, in particular the bending of wood-based panels, which are previously moistened on the surface with a chemical solution.
  • the chemical solution causes a necessary for bending, rapid penetration (moisture) of the moisture in the plate.
  • a method for the continuous forming edge portions namely an edge at the transition of surfaces of a wood-based panel is proposed with coating, introduced at least in the reshaped edge portion of the wood-based panel water and / or water vapor by injecting by penetrating into the edge region hollow spine (doped ) becomes. Subsequently, the doped edge region is heated. The forming takes place by means of a forming tool, which acts on the heated edge region of the wood-based panel.
  • doping with water and / or water vapor contributes to enabling forming with a particularly homogeneous and high-quality result.
  • the introduced into the reshaped edge area water can be heated quickly and contributes to the wood material very much higher thermal conductivity that even at relatively low energy consumption for heating a uniform and also a deeper than known penetrating into the wood material temperature increase is possible ,
  • water vapor is introduced into the region of the wood material to be reshaped.
  • Water and steam can also be used in mixture.
  • Water vapor can be produced inexpensively are or is inexpensive and can be used to minimize the additional energy to be applied for the heating of the wood material, or to replace.
  • the water and / or the water vapor with means for adjusting the surface tension also known as wetting or wetting agent
  • these are per se known means for lowering the surface tension, which cause a better wetting of the fiber surface.
  • the water and / or water vapor penetrate faster and further into the reshaped edge region of the wood material with the aid of better wetting. This penetrating wetting of the fibers to be reshaped results in a particularly uniform and lasting forming result.
  • the doping of water and / or water vapor takes place in the reshaped edge region of the wood material.
  • the injection allows a three-dimensional distribution of water and / or water vapor on and under the surface of the area of the wood material to be reshaped. This not only transforms the surface itself, but also a three-dimensional area. This allows reshaping of the wood material with reduced force, alternatively a stronger forming, which goes beyond a few tenths of a millimeter and can be up to 1-2 mm. In addition, the result of the forming is particularly uniform.
  • the doping of the reshaped edge area with water and / or water vapor is a crucial key to the accelerated reshaping of wood-based materials. Regardless of the energy or heat source, the heat is transferred more quickly to the surface and into the wood material after doping with water and / or water vapor. According to the invention, a particularly high processing speed is achieved when a
  • High-frequency device which efficiently stimulates the water molecules and thereby generates heat.
  • the use of high-frequency devices is known per se.
  • the forming tool can be heated. This minimizes or eliminates a potential temperature gradient between the fibers at the surface of the area to be reshaped and the tool surface. At the same time a possible formation of layers in the reshaped region of the wood material is counteracted, which may u.U. u. U.U. in forming a highly heated wood material with a cold tool. can form on the surface of the wood material.
  • the process for forming a range of wood-based materials is carried out at least twice on the same area of the wood-based material to be reformed.
  • the easiest way to do this is by two inventive devices for forming are arranged one after another and the reshaped wood material passes through these devices.
  • An alternative embodiment of the method according to the invention is used when the area of the wood material doped with water and / or steam is still sufficiently heated after being processed by a first forming tool. Then, by the action of a second forming tool, the desired contour for the region of the wood material to be reshaped can be achieved.
  • the inventive method with its above-described alternatives and options is used for forming edge regions of wood-based materials. It is particularly focused on the transitions from the top and bottom to the side surfaces. However, this procedure is also used for forming used by edges at the transition of surfaces that result from the profiling of wood materials, for example, for forming edges on wood materials with grooved surfaces.
  • the method according to the invention is preferably carried out with a device for reshaping an edge region, namely an edge, at the transition from surfaces of wood-based materials with coating, which has means for heating an edge region of wood-based materials and a tool for reshaping edge regions of a wood-based material.
  • a device for reshaping an edge region namely an edge
  • a tool for reshaping edge regions of a wood-based material are known per se.
  • they are supplemented by means for doping water and / or water vapor to be reshaped edge regions of a wood-based material, wherein the means for heating are arranged so that they act on the doped regions of the wood material to be formed, and that the tool for forming on the heated area the reshaped wood material acts.
  • Essential for implementing the invention is that means for doping the area of the wood material to be reshaped with water and / or water vapor are arranged in front of the means for heating and before the forming tool.
  • the means for doping are designed as means for injecting. They are designed as rotating spiked rollers with hollow spines whose spikes penetrate at least in sections into the region of the wood material to be doped. In this case, water and / or water vapor are then supplied from the interior of the roller and injected through the cavities in the spikes in the areas of the wood material to be doped.
  • This type of doping a precisely defined amount of water or water vapor can be introduced into the wood material. It is to be regarded as an advantage that the water or water vapor are not applied only to the surface of the wood material.
  • the improved penetration of the edge area to be deformed with good heat-conducting Water or steam causes a significantly improved deformability of the wood material. This manifests itself in a lower power requirement during forming.
  • the tool must therefore exert less pressure on the wood material to effect a given deformation.
  • larger volumes of wood-based material can be reshaped with the same force as in the prior art.
  • the doping with the undesirable water or water vapor thus causes significant improvements in the forming of wood materials, especially when the penetration of water or water vapor can be used in the wood material.
  • the advantage of the improved heat conduction and thus the improved plasticization of the wood-based material is used particularly efficiently by a high-frequency device which, as described above, is used for heating the wood-based material.
  • the wood-based material is heated as far as water or water vapor has penetrated.
  • This pervasive heating improves the plasticization - and thus the formability - of the wood material so that the edge areas can be better provided with chamfers or curves. It proves to be an advantage for the quality of these transformations when the plasticizing and forming not only takes place on the surface of the wood material.
  • preferred embodiments of the device either comprise two successively arranged tools, which are connected downstream of the means for doping and the means for heating.
  • the device has successively at least twice each doping means, means for heating and means for forming, which passes through the wood material to be formed in the operating state in succession until the transformation is completed.
  • the tools can advantageously be shaped so that they each cause a partial deformation of the wood material.
  • the tools for forming the wood material are known per se. There are usually rotating rollers whose profile is tuned to the deformation to be generated.
  • the tools can be designed to be heatable.
  • the tools can also be designed to be stationary, depending on the type of deformation that is to be made.
  • FIG. 1 shows a schematic representation of a wood-based panel according to the invention, here as a floor panel 1, consisting of a support plate 2 with a coating. 3
  • the carrier plate 2 consists of a high-density fiberboard (HDF) and is cuboidal.
  • the support plate 2 has an upper cover surface 4, one of the upper cover surface 4 oppositely disposed lower support surface 5. Between the upper cover surface 4 and the lower support surface 5 extend opposite side surface pairs 6 and 6 ', which is perpendicular to the top surface 4 and to Support surface 5 are arranged.
  • opposite side surface pairs 6, 6 ' have connecting means in the form of groove 8 and spring 9, with which several floor panels 1 can be connected together to form a flat composite, not shown.
  • Both the groove 8 and the spring 9 are each provided with corresponding locking means, not shown, which lock connected floor panels 1 in the vertical and in the horizontal direction.
  • the connecting means groove 8 and spring 9 and the locking means, not shown, are made of wood-based material and are machined out of the support plate 2.
  • the coating 3 is arranged on the upper cover surface 4 over the entire surface and fixedly connected to the support plate 2.
  • the coating 3 consists either of at least one resin-impregnated paper layer or of at least one color or lacquer coating.
  • the coating 3 has an optically effective decoration, for example a wood grain and, moreover, an abrasion-resistant effect which results either from abrasion-resistant particles or from a resistant paint surface.
  • the edge 7 is uniformly formed over its entire length and forms a chamfer 10.
  • the chamfer 10 is rounded in the illustrated embodiment.
  • the chamfer 10 can, on the representation of the FIG. 1 going out, evenly or irregularly shaped.
  • the chamfer 10 may be rounded or square.
  • the shape and size of the chamfer 10 depend on the selected degree of deformation.
  • FIG. 2 shows an enlarged area of FIG. 1 at the edge 7 of the carrier plate 2. Below the chamfer 10, a compacted region 11 is formed, wherein the compression also depends on the shape and size of the chamfer 10 and on the selected degree of deformation.
  • Fig. 3 shows a schematic representation of the device 12 according to the invention.
  • the device 12 comprises a roller 13 whose peripheral surface is provided with needles 14.
  • the needles 14 communicate with a conduit 15 which supplies water.
  • a high-frequency device 16 is arranged, which generates heat in the operating state on the floor panel 1.
  • a forming tool 17 is arranged, whose circumference is profiled. The profile is designed to reflect the contour of the reshaped area.
  • the above-described processing unit roller 13, high-frequency device 16 and forming tool 17 are arranged so that can act on a floor panel 1 that is positioned on a conveyor, not shown, and is guided past these processing units 13, 16 and 17.
  • a floor panel 1 which is provided with a sharp-edged profile, formed at the edge 7.
  • the forming takes place by firstly guiding the panel 1 past a rotating roller 13 whose peripheral surface is provided with needles 14.
  • the roller 13 is guided past the panel 1 in such a way that the needles 14 at least partially penetrate into the panel 1.
  • the perforated by the needles 14 portion of the panel 1 is acted upon by a line 15 with water, so that the edge 7 is moistened.
  • the water enters the panel 1 through the perforation created by the needles 14. Capillary forces support this Sucking in the water.
  • the water is warmed to a temperature of 80 ° C.
  • the elevated temperature also helps the water to penetrate.
  • the panel 1 is carried out in the working direction A under a high-frequency device 16.
  • This high-frequency device 16 acts on the moistened area of the panel 1.
  • the water is at least partially drawn into the panel 1.
  • the water is heated by the alternating magnetic field, according warms the wood material wherever water has penetrated.
  • the degree of heating may be predetermined by adjusting the corresponding power of the radio frequency device 16.
  • the heating is very fast, so that the working speed is 100 m / min.
  • the high-frequency device 16 is followed by the forming tool 17, here designed as a wheel, which acts under pressure on the heated area.
  • the forming takes place only by the brief action of the tool 17, a further fixation of the deformed area is not required.
  • the inventive method for forming the edges of wall, ceiling and / or floor panels is used.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Claims (8)

  1. Procédé continu de façonnage d'une zone d'arête (7), à savoir d'une arête au niveau de la transition de surfaces d'une plaque en matériau dérivé du bois (1) avec revêtement, comprenant les étapes suivantes :
    - chauffage de la zone d'arête (7) à façonner par l'introduction d'eau et/ou de vapeur d'eau dans la zone d'arête (7) à façonner, et
    - l'eau et/ou la vapeur d'eau étant injectée au moyen d'un picot creux (14) d'un rouleau à picots (13) rotatif entrant dans la zone d'arête,
    - réchauffage consécutif de la zone d'arête (7) au moyen d'un dispositif haute fréquence (16), et
    - formage de la zone d'arête (7) sous pression, le formage étant effectué par le fait que la plaque en matériau dérivé du bois (1) est amenée à passer devant un outil de façonnage (17).
  2. Procédé selon la revendication 1, caractérisé en ce que de l'eau et/ou de la vapeur d'eau est utilisée et est mélangée à des moyens pour le réglage de la tension superficielle.
  3. Procédé selon la revendication 1, caractérisé en ce que l'outil de façonnage (17) est chauffé lors du façonnage.
  4. Procédé selon au moins une des revendications précédentes, caractérisé en ce qu'au moins un deuxième outil de façonnage est utilisé pour le façonnage de la zone d'arête (7) à façonner d'une plaque en matériau dérivé du bois (1) sur la même zone d'arête (7) à façonner de la plaque en matériau dérivé du bois (1).
  5. Procédé selon au moins une des revendications précédentes, caractérisé en ce que le procédé de façonnage de la zone d'arête (7) à façonner d'une plaque en matériau dérivé du bois (1) est effectué au moins deux fois sur la même zone d'arête (7) à façonner de la plaque en matériau dérivé du bois (1).
  6. Dispositif pour le façonnage continu d'une zone d'arête (7) à façonner, à savoir d'une arête au niveau de la transition de surfaces de plaques en matériau dérivé du bois (1) avec revêtement, avec
    - des moyens (16) pour le réchauffage de la zone d'arête (7) à façonner, ces moyens étant constitués en tant que dispositif haute fréquence (16) et disposés de telle sorte qu'ils agissent sur la zone d'arête (7) à façonner, et
    - un outil de façonnage (17) pour le façonnage de la zone d'arête (7), lequel outil agit sur la zone d'arête (7) à façonner réchauffée par le fait qu'un dispositif de transport fait passer la plaque en matériau dérivé du bois (1) devant l'outil de façonnage (17), caractérisé en ce que
    - des moyens (13, 14) sont disposés pour l'introduction d'eau et/ou de vapeur d'eau dans la zone d'arête (7) à façonner, les moyens étant constitués en tant que rouleau à picots (13) rotatif avec picot creux (14) pénétrant au moins par tronçons dans la zone d'arête pour l'injection de l'eau et/ou de la vapeur d'eau.
  7. Dispositif selon la revendication 6, caractérisé en ce qu'il est prévu au moins deux outils de façonnage (17) disposés l'un après l'autre pour le façonnage.
  8. Dispositif selon au moins une des revendications 6 ou 7, caractérisé en ce qu'il est prévu au moins deux dispositifs (12) l'un derrière l'autre pour le façonnage de zones d'arête (7) d'une plaque en matériau dérivé du bois (1).
EP07013583.5A 2006-07-20 2007-07-11 Procédé destiné à déformer une zone de plaques en matériau dérivé du bois et dispositif correspondant Not-in-force EP1880816B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07013583T PL1880816T3 (pl) 2006-07-20 2007-07-11 Sposób i urządzenie do formowania obszaru płyt drewnopochodnych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006034098A DE102006034098B4 (de) 2006-07-20 2006-07-20 Verfahren zum Umformen eines Bereichs von Holzwerkstoffplatten und Vorrichtung hierfür

Publications (3)

Publication Number Publication Date
EP1880816A2 EP1880816A2 (fr) 2008-01-23
EP1880816A3 EP1880816A3 (fr) 2009-02-25
EP1880816B1 true EP1880816B1 (fr) 2015-06-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07013583.5A Not-in-force EP1880816B1 (fr) 2006-07-20 2007-07-11 Procédé destiné à déformer une zone de plaques en matériau dérivé du bois et dispositif correspondant

Country Status (4)

Country Link
EP (1) EP1880816B1 (fr)
DE (1) DE102006034098B4 (fr)
ES (1) ES2543806T3 (fr)
PL (1) PL1880816T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE525444T1 (de) * 2008-12-09 2011-10-15 Flooring Technologies Ltd Sperrschicht für die lackierung von oberflächen von holzwerkstoffplatten
BE1019259A5 (nl) * 2010-03-24 2012-05-08 Flooring Ind Ltd Sarl Werkwijzen voor het vervaardigen van panelen.
DE102010049777B4 (de) * 2010-10-29 2017-10-05 Brav-O-Tech Gmbh Befeuchtungsanlage für Pressen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1510412A (en) * 1976-03-12 1978-05-10 Dresser Corp Method of forming a curved flexible substantially self-supporting sheet like structure
DD287606A7 (de) * 1988-06-20 1991-03-07 Wtz D. Holzverarbeitenden Industrie,De Vorrichtung zum beschichten profilierter schmalflaechen von holzwerkstoffen
GB2364269B (en) * 1997-04-10 2002-05-29 Mdf Inc Method of manufacturing a molded door skin from a wood composite
US6689301B1 (en) * 1997-04-10 2004-02-10 Mdf, Inc. Method of manufacturing a molded door skin from a wood composite, door skin produced therefrom, and door manufactured therewith
DE69815864T2 (de) * 1997-04-25 2003-12-24 Masonite International Corp., Mississauga Verfahren und vorrichtung zum formen von holzfaserplatten
DE19718772B4 (de) * 1997-05-03 2015-08-20 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Anlage zur Herstellung von Holzwerkstoffplatten
AU7953498A (en) * 1997-06-19 1999-01-04 Masonite Corporation Post-press molding of fiberboard door skins
GB2340060B (en) * 1998-07-29 2003-08-13 Mdf Inc Method of manufacturing a molded door skin from a flat wood composite, door skin produced therefrom and door manufactured therewith
DE19945346C1 (de) * 1999-09-22 2000-12-14 Lothar Tank Verfahren zum Thermoreibglätten der Oberfläche von Produkten aus MDF-Materialien, Kunststoff oder dgl. und Vorrichtung zur Durchführung dieses Verfahrens
AR036482A1 (es) * 2001-09-12 2004-09-08 Masonite Corp Metodos de formacion de compuestos de madera revestidos, moldeados
DE10356837A1 (de) * 2003-12-05 2005-06-30 Dmitry Cherkasov Modifizierte Nukleotide und Nukleoside
ES2364144T3 (es) * 2004-06-25 2011-08-25 Kronotec Ag Procedimiento para la conformación de superficies de un material derivado de la madera.

Also Published As

Publication number Publication date
ES2543806T3 (es) 2015-08-24
EP1880816A2 (fr) 2008-01-23
DE102006034098B4 (de) 2009-07-09
PL1880816T3 (pl) 2015-11-30
EP1880816A3 (fr) 2009-02-25
DE102006034098A1 (de) 2008-01-24

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