EP0686465B1 - Method and apparatus for manipulating lamellar wood - Google Patents

Method and apparatus for manipulating lamellar wood Download PDF

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Publication number
EP0686465B1
EP0686465B1 EP95107679A EP95107679A EP0686465B1 EP 0686465 B1 EP0686465 B1 EP 0686465B1 EP 95107679 A EP95107679 A EP 95107679A EP 95107679 A EP95107679 A EP 95107679A EP 0686465 B1 EP0686465 B1 EP 0686465B1
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Prior art keywords
timber
pressing
slats
wooden
temperature
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French (fr)
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EP0686465A1 (en
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Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
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Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27HBENDING WOOD OR SIMILAR MATERIAL; COOPERAGE; MAKING WHEELS FROM WOOD OR SIMILAR MATERIAL
    • B27H1/00Bending wood stock, e.g. boards

Definitions

  • the invention relates to a method for producing Wooden slats, with a squared timber on top of the Solidification temperature of the lignin components of the wood lying temperature is heated and whereby from that Squared timber in several passes without cutting wood slats separated and directed immediately afterwards.
  • Wooden slats for example short boards or Parquet slats, especially for non-cutting Making a curvature or twist. You need to therefore, in most before further processing Cases are directed to these manufacturing-related Eliminate curvature or twist.
  • the operation of the known straightening devices is essentially in opposing the wooden slat to bend the curvature caused by the production so far that that after the elastic part of the Deformation remaining deformation just that caused by the Production-related curvature compensated.
  • the object of the invention is a method of the beginning mentioned genus so that the generated Wooden slats on one side a closed, not affected by tears or tensile stress Have surface that as a top surface of a Wood product is suitable.
  • Wooden slats by pressing between flat pressing surfaces be directed that the wooden slats up to at least Start pressing on one over the Solidification temperature of the lignin components of the wood lying temperature and that before the end of the pressing a cooling of the wooden slats to a temperature below the solidification temperature he follows.
  • the wooden slats remain after Straightening process in the straight state that they are between the have taken up flat pressing surfaces because in the meantime, namely during the pressing process, the Solidification temperature of the lignin components of the wood was undercut, so that the consolidation occurred while the wooden slat is inevitably in one straightened, level condition. That state remains even after the pressing process.
  • One side of the wooden slats thus produced does not have any Tears or tensile stresses that lead to tears could, and is therefore as a top surface one Suitable wood product, for example as an outer surface from several glued together wooden slats existing planks.
  • the invention also relates to an advantageous device to carry out the procedure.
  • Starting from one Device with a device for non-cutting separation of wooden slats from a squared timber and one immediately downstream straightening device is the invention Device characterized in that the Straightening device Two flat parallel pressing surfaces having.
  • the pressing surfaces each with a cooling device be provided so that the wooden slats under the Solidification temperature of the lignin components cooled can be.
  • the device 1 shows a device 1 for cutting without cutting of wooden slats 2 of a square timber 3.
  • the device 1 has an endlessly rotating, driven conveyor belt 4 through which the squared timber 3 against one Wood guide surface 5 is pressed.
  • the conveyor belt 4 is supported on its back on support rollers 4a.
  • the squared timber 3 in the direction of arrow 6 advanced against a knife 7, which the wooden lamella 2 from Squares 3.
  • the wooden lamella 2 can for example be a parquet slat. But it is also beneficial possible to straighten longer wooden slats in this way.
  • the squared timber 3 is previously in a (not shown) Heating device, for example a heated water bath, to a temperature above the solidification temperature its lignin components and pectin components heated been. At the same time, the moisture content of the Squared timber 3 to a value above his Fiber saturation point increased, for example to one Moisture content from 25 to 30%.
  • a Heating device for example a heated water bath
  • the moisture content of the Squared timber 3 to a value above his Fiber saturation point increased, for example to one Moisture content from 25 to 30%.
  • the heated, separated wooden slats 2 become immediately afterwards in a straightening device 8 Subjected to pressing process, being between levels Pressing surfaces 9 are pressed.
  • a cooling device 11 arranged, for example one of cooling water flowed through support plate. This will make the wooden slats to a temperature below the solidification temperature of the lignin components and pectin components cooled. As these components change during the pressing process solidify, the wooden slats 2 keep theirs afterwards straight form.
  • FIG. 2 there is only one Wooden slat 2 between the press pad 12 and the Press ram 13 added.
  • Fig. 3 shows that several Wooden slats 2 picked up, pressed and can be cooled.
  • FIG. 4 shows one in relation to FIG. 1 in this regard modified version of the straightening device 8 that on a separate cooling device 11 was dispensed with.
  • the endless tapes 10 are so long and / or the throughput speed becomes so low chosen that even without additional cooling Lowering the temperature of the wooden slats 2 below Solidification temperature of the lignin components takes place.
  • the opposite sections of the bands 10, that form the pressing surfaces 9 are on their back supported by support rollers 14 to the pressing forces to record.
  • the illustrated embodiments have in common that the separated wooden slats 2 until the beginning of Pressing between the pressing surfaces 9 at a temperature are kept above the solidification temperature of the Lignin components of the wood lies. This will do so achieved that the wooden slats 2 immediately after Detach between the pressing surfaces 9, so that no significant cooling has occurred in the meantime.
  • the before the separation process is sufficient to the wooden slats 2 still in a plastically deformable Bring state between the press surfaces 9.
  • During the Pressing process is a cooling of the wooden slats, so that this before the end of the pressing on a below the solidification temperature cooled will.

Abstract

The square timber is heated to a temp. above the solidifying temp. of the liquate components of the wood. The wooden laminations are cut from the square timber in several steps in a chipless manner and then directly straightened by compression between flat press faces. At least up to the compression start, the lamination are kept at a temp. exceeding that of solidifying the liquate components. Before the compression end the laminations are cooled down to a temp. below the solidifying temp. A straightener (8), behind the cutter, comprises two flat, parallel press faces (9). <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Holzlamellen, wobei ein Kantholz auf eine über der Verfestigungstemperatur der Ligninbestandteile des Holzes liegende Temperatur erwärmt wird und wobei von dem Kantholz in mehreren Durchläufen spanlos Holzlamellen abgetrennt und unmittelbar danach gerichtet werden.The invention relates to a method for producing Wooden slats, with a squared timber on top of the Solidification temperature of the lignin components of the wood lying temperature is heated and whereby from that Squared timber in several passes without cutting wood slats separated and directed immediately afterwards.

Holzlamellen, beispielsweise kurze Bretter oder Parkettlamellen, weisen insbesondere bei spanloser Herstellung eine Krümmung oder einen Drall auf. Sie müssen daher vor ihrer weiteren Verarbeitung in den meisten Fällen gerichtet werden, um diese herstellungsbedingte Krümmung bzw. den Drall zu beseitigen.Wooden slats, for example short boards or Parquet slats, especially for non-cutting Making a curvature or twist. You need to therefore, in most before further processing Cases are directed to these manufacturing-related Eliminate curvature or twist.

Um bei spanlos abgetrennten flachen Holzlamellen eine herstellungsbedingte Krümmung um eine sich quer zur Holzlängsrichtung erstreckende Achse zu beseitigen, ist es bekannt (DE-OS 32 07 548), die Holzlamelle durch eine Biegezone laufen zu lassen, in der eine einstellbare Biegung der Holzlamelle erfolgt, um die unerwünschte Krümmung zu beseitigen. Die Biegezone weist eine auf der einen Seite der Holzlamelle angeordnete Biegewalze und einen auf der anderen Seite angeordneten, endlos umlaufenden Gurt auf. In order to cut a flat wooden lamella without cutting manufacturing-related curvature around a cross Eliminate wood longitudinal axis, it is known (DE-OS 32 07 548), the wooden slat by a Bend zone in which an adjustable Bending of the wooden slat is done to the unwanted Eliminate curvature. The bending zone has one on the one side of the wooden slat arranged bending roller and one arranged on the other side, endless circumferential belt.

Durch eine Verstellung der Biegewalze muß der sich in der Biegezone ergebende Biegewinkel der Holzlamelle jeweils so eingestellt werden, daß die dadurch bedingte bleibende Verformung der Holzlamelle gerade die zu beseitigende Krümmung kompensiert. Daher ist in jedem Einzelfall eine gesonderte Einstellung erforderlich.By adjusting the bending roller, it must be in the The bending angle of the wooden lamella resulting in the bending zone in each case be set so that the permanent Deformation of the wooden slat just the one to be removed Compensation for curvature. Therefore there is one in each individual case separate setting required.

Ein durch das spanlose Abtrennen der Holzlamelle von einem Kantholz durch ein schrägstehendes Messer verursachter Drall der Holzlamelle kann mit dieser bekannten Vorrichtung nicht ausgeglichen werden. Hierfür sind Vorrichtungen zum Drehrichten von Holzlamellen bekannt (DE-PS 37 01 127), bei denen die Holzlamellen einen mit einem Längsdrall versehenen Brettführungskanal in Längsrichtung durchlaufen. Auch hierbei muß die Einstellung des Brettführungskanals so erfolgen, daß die dadurch verursachte bleibende Verformung der Holzlamelle gerade den herstellungsbedingten Drall kompensiert. Dies bedingt einen verhältnismäßig komplizierten Aufbau der Vorrichtung und macht eine gesonderte Einstellung auf jeden Einzelfall erforderlich.One by cutting the wooden slat from one without cutting Squared timber caused by an inclined knife Swirl of the wooden slat can be known with this Device can not be compensated. For this are Devices for rotating wooden slats are known (DE-PS 37 01 127), in which the wooden slats a board guide channel provided with a longitudinal twist run lengthways. Here too the Adjust the board guide channel so that the this caused permanent deformation of the wooden slat just compensated for the production-related twist. This requires a relatively complicated structure of the Device and makes a separate setting every individual case required.

Die Arbeitsweise der bekannten Richtvorrichtungen besteht im wesentlichen darin, die Holzlamelle entgegengesetzt zu der herstellungsbedingten Krümmung so weit zu krümmen, daß die nach dem Zurückfedern des elastischen Anteils der Verformung verbleibende Verformung gerade die durch die Herstellung bedingte Krümmung kompensiert.The operation of the known straightening devices is essentially in opposing the wooden slat to bend the curvature caused by the production so far that that after the elastic part of the Deformation remaining deformation just that caused by the Production-related curvature compensated.

Beim spanlosen Abtrennen der Holzlamellen entstehen auf der Krümmungsaußenseite zwangsläufig feine Einrisse, die sich zwar beim Geradrichten der Holzlamelle wieder schließen, die aber trotzdem als Einrisse oder zumindest Zugspannungen, die später zu Einrissen führen, zurückbleiben. Deshalb ist diese Oberfläche beispielsweise bei der nachfolgenden Herstellung von Landhausdielen, die aus miteinander verleimten Holzlamellen bestehen, oder von Parkettlamellen, nicht als Oberflächenseite geeignet, weil diese frei von Einrisssen sein soll. Wenn mit dem bekannten Richtverfahren der Holzlamelle eine entgegengesetzt zur herstellungsbedingten Krümmung gerichtete Krümmung aufgezwungen wird, so werden auch hierbei auf der Krümmungsaußenseite Einrisse erzeugt. Die so hergestellte, gerichtete Holzlamelle weist daher Einrisse auf beiden Seiten auf, so daß anschließend keine von beiden Seiten als freiliegende Oberfläche des Holzerzeugnisses geeignet ist.When cutting the wooden lamellae without cutting arise the outside of the curvature inevitably fine tears, the when straightening the wooden slat again close, but still as tears or at least Tensile stresses that later lead to tears, stay behind. That is why this surface is for example in the subsequent manufacture of planks that consist of glued wooden slats, or of Parquet slats, not suitable as a surface side because this should be free of tears. If with that known straightening process of the wooden lamella opposite to the curvature caused by the manufacturing process directed curvature is forced, so will tears are generated on the outside of the curve. The wooden slat produced in this way therefore points Tears on both sides, so that subsequently none from both sides as an exposed surface of the Wood product is suitable.

Bei einem bekannten Verfahren (DE-OS 42 34 236) werden die spanlos von einem Kantholz abgetrennten Holzlamellen unmittelbar danach einem Wechselbiegevorgang unterworfen, bevor sie zwischen ebenen Preßflächen gepreßt und gekühlt werden.In a known method (DE-OS 42 34 236) Wood slats separated from a square timber without cutting immediately subjected to an alternate bending process, before being pressed and cooled between flat pressing surfaces will.

Aufgabe der Erfindung ist es, ein Verfahren der eingangs genannten Gattung so auszubilden, daß die erzeugten Holzlamellen auf einer Seite eine geschlossene, nicht durch Einrisse oder Zugspannungen beeinträchtigte Oberfläche aufweisen, die als Deckfläche eines Holzerzeugnisses geeignet ist.The object of the invention is a method of the beginning mentioned genus so that the generated Wooden slats on one side a closed, not affected by tears or tensile stress Have surface that as a top surface of a Wood product is suitable.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Holzlamellen durch Pressen zwischen ebenen Preßflächen gerichtet werden, daß die Holzlamellen bis mindestens zum Beginn des Pressens auf einer über der Verfestigungstemperatur der Ligninbestandteile des Holzes liegenden Temperatur gehalten werden und daß vor dem Ende des Pressens eine Abkühlung der Holzlamellen auf eine unter der Verfestigungstemperatur liegenden Temperatur erfolgt.This object is achieved in that the Wooden slats by pressing between flat pressing surfaces be directed that the wooden slats up to at least Start pressing on one over the Solidification temperature of the lignin components of the wood lying temperature and that before the end of the pressing a cooling of the wooden slats to a temperature below the solidification temperature he follows.

Da die Holzlamellen in einem Temperaturzustand zwischen die ebenen Preßflächen gelangen, in denen die aushärtbaren Holzbestandteile, insbesondere Lignin und Pektin, noch weich sind, entstehen beim Geradrichten der Holzlamellen weder Einrisse noch Zugspannungen auf der Seite, die beim Abtrennvorgang als geschlossene Oberfläche ohne Einrisse entstanden ist.Since the wooden slats are in a temperature state between reach the flat press surfaces in which the curable Wood components, especially lignin and pectin, still are soft, arise when straightening the wooden slats neither tears nor tensile stresses on the side, which when Separation process as a closed surface without tears arose.

Obwohl während des Richtvorgangs absichtlich keine Krümmung entgegengesetzt zu der herstellungsbedingten Krümmung erfolgt, bleiben die Holzlamellen nach dem Richtvorgang in dem geraden Zustand, den sie zwischen den ebenen Preßflächen eingenommen haben, weil inzwischen, nämlich während des Preßvorgangs, die Verfestigungstemperatur der Ligninbestandteile des Holzes unterschritten wurde, so daß die Verfestigung eingetreten ist, während sich die Holzlamelle zwangsläufig in einem gerade gerichteten, ebenen Zustand befand. Dieser Zustand bleibt auch nach dem Preßvorgang bestehen. Die eine Seite der so erzeugten Holzlamellen weist folglich keine Einrisse oder Zugspannungen auf, die zu Einrissen führen könnten, und ist deshalb als Deckfläche eines Holzerzeugnisses geeignet, beispielsweise als Außenfläche von aus mehreren zusammengeleimten Holzlamellen bestehenden Landhausdielen.Although intentionally none during the straightening process Curvature opposite to the manufacturing-related If the curvature occurs, the wooden slats remain after Straightening process in the straight state that they are between the have taken up flat pressing surfaces because in the meantime, namely during the pressing process, the Solidification temperature of the lignin components of the wood was undercut, so that the consolidation occurred while the wooden slat is inevitably in one straightened, level condition. That state remains even after the pressing process. One side of the wooden slats thus produced does not have any Tears or tensile stresses that lead to tears could, and is therefore as a top surface one Suitable wood product, for example as an outer surface from several glued together wooden slats existing planks.

Die Erfindung betrifft auch eine vorteilhafte Vorrichtung zur Durchführung des Verfahrens. Ausgehend von einer Vorrichtung mit einer Vorrichtung zum spanlosen Abtrennen von Holzlamellen von einem Kantholz und einer unmittelbar nachgeschalteten Richtvorrichtung ist die erfindungsgemäße Vorrichtung dadurch gekennzeichnet, daß die Richtvorrichtung Zwei ebene parallele Preßflächen aufweist.The invention also relates to an advantageous device to carry out the procedure. Starting from one Device with a device for non-cutting separation of wooden slats from a squared timber and one immediately downstream straightening device is the invention Device characterized in that the Straightening device Two flat parallel pressing surfaces having.

Um eine Beschleunigung des Arbeitsablaufs zu erreichen, können die Preßflächen jeweils mit einer Kühleinrichtung versehen sein, so daß die Holzlamellen rascher unter die Verfestigungstemperatur der Ligninbestandteile abgekühlt werden können. To speed up the workflow, can the pressing surfaces each with a cooling device be provided so that the wooden slats under the Solidification temperature of the lignin components cooled can be.

Weitere vorteilhafte Ausgestaltungen des Erfindungsgedankens sind Gegenstand weiterer Unteransprüche.Further advantageous embodiments of the The idea of the invention is the subject of further Subclaims.

Nachfolgend werden Ausführungsbeispiele der Erfindung erläutert, die in der Zeichnung dargestellt sind. Es zeigt:

  • Fig. 1 in stark vereinfachter Darstellungsweise eine Vorrichtung zum Herstellen von Holzlamellen und
  • Fig. 2, 3 und 4 demgegenüber abgewandelte Ausführungsformen der Richtvorrichtung, jeweils ebenfalls in stark vereinfachter Darstellungsweise.
  • Exemplary embodiments of the invention are explained below, which are shown in the drawing. It shows:
  • Fig. 1 shows a device for producing wooden slats and in a highly simplified representation
  • 2, 3 and 4, in contrast, modified embodiments of the straightening device, each likewise in a greatly simplified representation.
  • Fig. 1 zeigt eine Vorrichtung 1 zum spanlosen Abtrennen von Holzlamellen 2 von einem Kantholz 3. Die Vorrichtung 1 weist ein endlos umlaufendes, angetriebenes Förderband 4 auf, durch das das Kantholz 3 gegen eine Holzführungsfläche 5 gedrückt wird. Das Förderband 4 stützt sich an seiner Rückseite an Stützrollen 4a ab. Zugleich wird das Kantholz 3 in Richtung des Pfeiles 6 gegen ein Messer 7 vorgeschoben, das die Holzlamelle 2 vom Kantholz 3 abtrennt. Die Holzlamelle 2 kann beispielsweise eine Parkettlamelle sein. Es ist aber ebenso vorteilhaft möglich, längere Holzlamellen auf diese Weise zu richten.1 shows a device 1 for cutting without cutting of wooden slats 2 of a square timber 3. The device 1 has an endlessly rotating, driven conveyor belt 4 through which the squared timber 3 against one Wood guide surface 5 is pressed. The conveyor belt 4 is supported on its back on support rollers 4a. At the same time, the squared timber 3 in the direction of arrow 6 advanced against a knife 7, which the wooden lamella 2 from Squares 3. The wooden lamella 2 can for example be a parquet slat. But it is also beneficial possible to straighten longer wooden slats in this way.

    Das Kantholz 3 ist vorher in einer (nicht dargestellten) Heizeinrichtung, beispielsweise einem beheizten Wasserbad, auf eine Temperatur oberhalb der Verfestigungstemperatur seiner Ligninbestandteile und Pektinbestandteile erwärmt worden. Zugleich wurde der Feuchtigkeitsgehalt des Kantholzes 3 auf einen Wert oberhalb seines Fasersättigungspunktes erhöht, beispielsweise auf einen Feuchtigkeitsgehalt von 25 bis 30 %. The squared timber 3 is previously in a (not shown) Heating device, for example a heated water bath, to a temperature above the solidification temperature its lignin components and pectin components heated been. At the same time, the moisture content of the Squared timber 3 to a value above his Fiber saturation point increased, for example to one Moisture content from 25 to 30%.

    Die so erwärmten, abgetrennten Holzlamellen 2 werden unmittelbar danach in einer Richtvorrichtung 8 einem Preßvorgang unterworfen, wobei sie zwischen ebenen Preßflächen 9 gepreßt werden.The heated, separated wooden slats 2 become immediately afterwards in a straightening device 8 Subjected to pressing process, being between levels Pressing surfaces 9 are pressed.

    Bei dem in Fig. 1 dargestellten Ausführungsbeispiel werden die Preßflächen 9 von zwei endlos umlaufenden angetriebenen Bändern 10, beispielsweise Stahlbändern, gebildet. Jeweils hinter den parallelen Preßflächen 9, die von den beiden benachbarten Abschnitten der beiden Bänder 10 gebildet werden, ist eine Kühleinrichtung 11 angeordnet, beispielsweise eine von Kühlwasser durchströmte Stützplatte. Dadurch werden die Holzlamellen auf eine Temperatur unterhalb der Verfestigungstemperatur der Ligninbestandteile und Pektinbestandteile abgekühlt. Da sich diese Bestandteile während des Preßvorgangs verfestigen, behalten die Holzlamellen 2 danach ihre gerade gerichtete Form bei.In the embodiment shown in Fig. 1 the pressing surfaces 9 of two endlessly rotating driven belts 10, for example steel belts, educated. Each behind the parallel pressing surfaces 9, the from the two adjacent sections of the two bands 10 are formed, is a cooling device 11 arranged, for example one of cooling water flowed through support plate. This will make the wooden slats to a temperature below the solidification temperature of the lignin components and pectin components cooled. As these components change during the pressing process solidify, the wooden slats 2 keep theirs afterwards straight form.

    Bei den Ausführungsbeispielen nach den Fig. 2 und 3 werden die Preßflächen 9 von einer Preßauflage 12 und einem demgegenüber beweglichen Preßstempel 13 gebildet, zwischen denen die Holzlamellen 2 gepreßt und gekühlt werden.In the embodiments according to FIGS. 2 and 3 the pressing surfaces 9 of a press pad 12 and one in contrast movable plunger 13 formed between where the wooden slats 2 are pressed and cooled.

    Beim Beispiel nach Fig. 2 ist nur eine einzelne Holzlamelle 2 zwischen der Preßauflage 12 und dem Preßstempel 13 aufgenommen. Fig. 3 zeigt, daß auch mehrere Holzlamellen 2 gleichzeitig aufgenommen, gepreßt und gekühlt werden können.In the example according to FIG. 2 there is only one Wooden slat 2 between the press pad 12 and the Press ram 13 added. Fig. 3 shows that several Wooden slats 2 picked up, pressed and can be cooled.

    Fig. 4 zeigt eine gegenüber der Fig. 1 dahingehend abgewandelte Ausführung der Richtvorrichtung 8, daß auf eine gesonderte Kühleinrichtung 11 verzichtet wurde. Die endlosen Bänder 10 sind hierbei so lang ausgeführt und/oder die Durchlaufgeschwindigkeit wird so niedrig gewählt, daß auch ohne zusätzliche Kühlung eine Temperaturabsenkung der Holzlamellen 2 unter die Verfestigungstemperatur der Ligninbestandteile erfolgt. Die einander gegenüberliegenden Abschnitte der Bänder 10 , die die Preßflächen 9 bilden, werden an ihrer Rückseite durch Stützrollen 14 abgestützt, um die Preßkräfte aufzunehmen.FIG. 4 shows one in relation to FIG. 1 in this regard modified version of the straightening device 8 that on a separate cooling device 11 was dispensed with. The endless tapes 10 are so long and / or the throughput speed becomes so low chosen that even without additional cooling Lowering the temperature of the wooden slats 2 below Solidification temperature of the lignin components takes place. The opposite sections of the bands 10, that form the pressing surfaces 9 are on their back supported by support rollers 14 to the pressing forces to record.

    Den dargestellten Ausführungsbeispielen ist gemeinsam, daß die abgetrennten Holzlamellen 2 bis zum Beginn des Pressens zwischen den Preßflächen 9 auf einer Temperatur gehalten werden, die über der Verfestigungstemperatur der Ligninbestandteile des Holzes liegt. Dies wird dadurch erreicht, daß die Holzlamellen 2 unmittelbar nach dem Abtrennen zwischen die Preßflächen 9 gelangen, so daß inzwischen keine wesentliche Abkühlung erfolgt. Die vor dem Abtrennvorgang durchgeführte Erwärmung reicht aus, um die Holzlamellen 2 noch in einem plastisch verformbaren Zustand zwischen die Preßflächen 9 zu bringen. Während des Preßvorgangs erfolgt eine Abkühlung der Holzlamellen, so daß diese noch vor dem Ende des Pressens auf eine unter der Verfestigungstemperatur liegende Temperatur abgekühlt werden.The illustrated embodiments have in common that the separated wooden slats 2 until the beginning of Pressing between the pressing surfaces 9 at a temperature are kept above the solidification temperature of the Lignin components of the wood lies. This will do so achieved that the wooden slats 2 immediately after Detach between the pressing surfaces 9, so that no significant cooling has occurred in the meantime. The before the separation process is sufficient to the wooden slats 2 still in a plastically deformable Bring state between the press surfaces 9. During the Pressing process is a cooling of the wooden slats, so that this before the end of the pressing on a below the solidification temperature cooled will.

    Damit wird einerseits verhindert, daß Risse oder Spannungen auf derjenigen Seite der Holzlamelle 2 durch den Richtvorgang erzeugt würden, die nachfolgend als freie Deckfläche eines Holzerzeugnisses verwendet würde. Dies ist beim dargestellten Ausführungsbeispiel die Unterseite der Holzlamelle 2. Zugleich wird aber auch eine wesentliche Energieeinsparung erzielt, weil keine Erwärmung der Holzlamelle nach dem Abtrennvorgang erforderlich ist.On the one hand, this prevents cracks or Tensions on that side of the wooden lamella 2 the straightening process would be generated, which subsequently as free Top surface of a wood product would be used. This is the bottom in the illustrated embodiment the wooden lamella 2. But at the same time it becomes a achieved significant energy savings because none Heating of the wooden lamella after the separation process is required.

    Claims (5)

    1. Process to manufacture timber slats where a square piece of timber is heated to a temperature in excess of the setting temperature of the lignin components of the timber and where timber slats are separated from the square timber, without cutting, in several passes, and immediately afterwards are straightened, characterised in that the timber slats are straightened by pressing them between level pressing surfaces, that the timber slats are maintained at a temperature in excess of the setting temperature of the lignin components of the timber at least until the start of pressing and that before pressing is completed, the timber slats are cooled to a temperature that is below the setting temperature.
    2. Device to perform the process according to claim 1, having a device for separating timber slats from a piece of square timber, without cutting and having a straightening device connected immediately downstream, characterised in that the straightening device (8) comprises two even parallel pressing surfaces (9).
    3. Device according to claim 2, characterised in that the pressing surfaces (9) each have a cooling device (11).
    4. Device according to claim 3, characterised in that the pressing surfaces (9) are made up of two continuously revolving belts (10).
    5. Device according to claim 3, characterised in that the pressing surfaces (9) are formed by a pressing support (12) and a pressing plunger (13).
    EP95107679A 1994-06-06 1995-05-19 Method and apparatus for manipulating lamellar wood Expired - Lifetime EP0686465B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE4419682A DE4419682A1 (en) 1994-06-06 1994-06-06 Method and device for producing wooden slats
    DE4419682 1994-06-06

    Publications (2)

    Publication Number Publication Date
    EP0686465A1 EP0686465A1 (en) 1995-12-13
    EP0686465B1 true EP0686465B1 (en) 1998-07-08

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    EP95107679A Expired - Lifetime EP0686465B1 (en) 1994-06-06 1995-05-19 Method and apparatus for manipulating lamellar wood

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    EP (1) EP0686465B1 (en)
    AT (1) ATE168063T1 (en)
    DE (2) DE4419682A1 (en)

    Family Cites Families (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US1994607A (en) * 1933-01-28 1935-03-19 Peter C Reilly Electrothermic process of shaping wood
    SE413641B (en) * 1975-02-19 1980-06-16 Skogsegarnas Vaenerind PROCEDURES AND DEVICE FOR CUTTING HOURS
    DE3207548C2 (en) 1982-03-03 1984-02-23 Gebrüder Linck Maschinenfabrik und Eisengießerei "Gatterlinck", 7602 Oberkirch Device for the production of flat wood products such as boards
    IT1180094B (en) * 1984-10-15 1987-09-23 Vincenzo Pagnozzi VACUUM DRYER FOR SAWED TIMBER
    DE3701127A1 (en) 1987-01-16 1988-07-28 Linck Masch Gatterlinck DEVICE FOR LEVELING BOARDS AND THE LIKE
    US5050314A (en) * 1988-10-31 1991-09-24 Leon Breckenridge Method for regulating drying kiln air flow
    EP0376918B1 (en) * 1988-12-30 1995-03-29 Gebr. Linck Maschinenfabrik "Gatterlinck" GmbH & Co. KG Method and apparatus for manufacturing lamellar wood from sawn timber
    DE3936312A1 (en) * 1989-11-01 1991-05-02 Linck Masch Gatterlinck Laminated wood panels formed from narrow laminations - which are glued edge to edge to form sheets which are glued together
    WO1991009713A1 (en) * 1989-12-25 1991-07-11 Hisaka Works Limited Method and apparatus for treating wood
    DE4234236A1 (en) * 1992-10-10 1994-04-14 Linck Masch Gatterlinck Method and device for straightening wooden slats

    Also Published As

    Publication number Publication date
    ATE168063T1 (en) 1998-07-15
    DE4419682A1 (en) 1995-12-07
    EP0686465A1 (en) 1995-12-13
    DE59502736D1 (en) 1998-08-13

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