EP2653279B1 - Verfahren und Vorrichtung zum Herstellen von Teilchentafeln mit nicht gleichförmiger Dichteverteilung - Google Patents

Verfahren und Vorrichtung zum Herstellen von Teilchentafeln mit nicht gleichförmiger Dichteverteilung Download PDF

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Publication number
EP2653279B1
EP2653279B1 EP12164668.1A EP12164668A EP2653279B1 EP 2653279 B1 EP2653279 B1 EP 2653279B1 EP 12164668 A EP12164668 A EP 12164668A EP 2653279 B1 EP2653279 B1 EP 2653279B1
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EP
European Patent Office
Prior art keywords
particle
particles
mat
layer
curtain
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EP12164668.1A
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English (en)
French (fr)
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EP2653279A1 (de
Inventor
Ari Hemmilä
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Ikea Supply AG
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Ikea Supply AG
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Application filed by Ikea Supply AG filed Critical Ikea Supply AG
Priority to PL12164668T priority Critical patent/PL2653279T3/pl
Priority to EP12164668.1A priority patent/EP2653279B1/de
Priority to HUE12164668A priority patent/HUE030928T2/en
Priority to PCT/EP2013/058099 priority patent/WO2013156569A1/en
Publication of EP2653279A1 publication Critical patent/EP2653279A1/de
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Publication of EP2653279B1 publication Critical patent/EP2653279B1/de
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    • 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
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B27N3/146—Controlling mat weight distribution

Definitions

  • the present invention is in the technical field of producing particle boards. More specifically, the present invention relates to the production of particle boards having varying density in the longitudinal and/or in the lateral dimension of the board. The present invention further relates to apparatuses for use in the production of such particle boards, and to methods of using same.
  • Particle boards are widely used in the furniture and construction industry.
  • Various types of particle boards are known. Among those, as disclosed in US-A-4,200,430 , particle boards made from lignocellulosic particles such as wood chips or strands are probably the most widely used.
  • lignocellulosic particles are thoroughly mixed or coated with an adhesive binder and then distributed on a horizontal support to form a mat. The mat is compressed under high pressure and/or temperature to form a particle board. The particle board is cooled and cut into the desired shape to form the final product.
  • Standard particle boards have a substantially constant density along their longitudinal and lateral dimensions.
  • WO 2005/046950 From WO 2005/046950 is known the production of a particle board having a varying local density [kg/m 3 ] along the longitudinal and/or lateral dimension of the board.
  • Such boards having a non-uniform density distribution are produced by using additional spreader elements which scatter an additional amount of particles to certain areas of the mat.
  • a mat having a varying amount of particles per unit area [kg/m 2 ] is pressed to a particle board of uniform thickness, a particle board of non-uniform density distribution is formed.
  • Such boards are useful for providing increased stability in areas where increased stability is needed (e.g., at the edges of the board). Nevertheless the board is relatively lightweight and its production requires a relatively small amount raw material.
  • WO 2005/046950 also discloses corresponding methods of producing particle boards having a non-uniform density distribution.
  • particle boards having density variation in the lateral dimension are produced by adding stripes of additional material to the mat and then pressing the mat to uniform thickness.
  • the stripes of additional material are added across the entire board in the longitudinal and lateral dimension of the mat.
  • the additional material is added twice at the intersections of the longitudinal and lateral stripes.
  • This two-fold addition of the material at the intersections of the stripes leads to an undesired further increase in density in these areas of the resulting particle board.
  • two-fold addition of raw material at the intersection of the stripes may lead to undesired variations in the thickness of the particle board, which may in turn damage the press or sanding machine in a subsequent processing step.
  • EP0162118 is known a process and an arrangement for the production of a mat in a particle board production process, which mat has a predetermined area-specific weight.
  • a predetermined distribution of weight per unit area in the lateral direction of the mat is produced by means of stripper devices, which strip off particles in the mat above a certain, adjustable, height.
  • stripper devices which strip off particles in the mat above a certain, adjustable, height.
  • multiple stripes of different height are produced in the mat.
  • stripes of different density result.
  • the method used in EP0162118 is, however, not suitable for very high production speed. Furthermore, stripes extending in the lateral dimension of the mat (transverse to the direction of production) cannot be produced.
  • Another object of the invention is to provide a method and an apparatus for the production of a particle board having varying density in the longitudinal and/or lateral direction, which method avoids the wasting valuable raw material.
  • Another object of the invention is to provide a method and apparatus for the production of a particle board having varying density in the longitudinal and/or lateral direction, in which method the amount of material added to the areas of increased density can be finely adjusted.
  • Another object of the invention is to provide a method and apparatus for the production of a particle board having varying density in the longitudinal and/or lateral direction, which method allows for the production of well defined areas of increased density, said defined areas exhibiting, e.g., sharp boundaries between areas of normal and increased density.
  • One aspect of the invention relates to a method of forming a layer of particles of a particle mat; said layer of particles extending in a longitudinal dimension and in a lateral dimension; said method comprising:
  • the particle mat is a multi-layered particle mat.
  • said curtain of downfalling particles is provided continuously.
  • said longitudinal dimension and said lateral dimension are in a horizontal plane and are perpendicular to each other.
  • said curtain of downfalling particles extends substantially over the entire lateral width of the particle mat or layer of particles.
  • the particle flow per unit lateral width [in kg/s/cm] in said curtain of downfalling particles, preferably before the removal of particles in step (iii), is substantially constant over the entire lateral width of the curtain of downfalling particles.
  • the particle flow [in kg/s] in said curtain of downfalling particles, preferably before the removal of particles in step (iii), is substantially constant over time.
  • the particles are selected from the group consisting of lignocellulosic particles, wood particles, wood chips, and wood fibers. Other types of particles are also envisaged.
  • the particles are admixed with an adhesive substance. Suitable methods of admixing the adhesive substance, or binder, with particles are well known in the art.
  • the particle providing means is in form of a conveyor belt.
  • the conveyor belt is preferably of a lateral width which corresponds to the lateral width of said movable support.
  • the movable support is a conveyor belt.
  • other movable supports are also envisaged.
  • the movable support can be in form of a movable rigid plate, or it can be a movable mesh.
  • step (iii) of removing downfalling particles is effected by positioning particle removing means in said curtain of downfalling particles.
  • This procedure ensures a rather even distribution of particles in the areas of the particle layer where the particles are not removed.
  • This procedure also allows high mass flows, i.e., a high speed of production. It also results in a sharp delimitation of areas of normal thickness and areas of reduced thickness in the particle mat. It hence results in sharp edges between such areas.
  • the particle removing means comprises (or is) at least one conveyor belt.
  • the particle removing means can also be in form of at least one screw conveyor, funnel, or at least one air suction line.
  • the particle removing means is preferably arranged in parallel orientation to said longitudinal dimension Y.
  • the particle removing means is only temporarily introduced into said curtain of downfalling particles. This allows for a pattern of first and second areas of distinct thickness also in the longitudinal dimension of the mat. Hence, it is preferred that said particle removing means is introduced into said curtain of downfalling particles at predetermined points in time, and for predetermined periods of time. The predetermined points in time and time periods define the pattern of first and second areas of distinct thickness in the longitudinal dimension (direction of production).
  • the position of the particle removing means is adjustable in the lateral dimension X. This serves to define the pattern of first and second areas of distinct thickness in the lateral dimension of the mat.
  • the width of said particle removing means in the lateral dimension is adjustable.
  • the adjustment of the width is preferably accomplished by pivoting a pair of deflecting means provided at opposite sides of said particle removing means.
  • the pair of deflecting means may be a pair of inclined plates extending along said longitudinal dimension (direction of production, Y) and being pivotable about an axis parallel to said longitudinal dimension Y.
  • the invention further relates to a method of producing a particle mat, wherein at least one layer of said particle mat is produced by a method of forming a layer as described above.
  • the mat produced by methods of the invention preferably includes multiple layers.
  • the method of forming a mat includes a method of forming a first layer of particles as described above, and forming at least one further layer of particles, above or below said first layer of particles.
  • first layer shall not be understood as meaning that the first layer is produced earlier than the "further” layers.
  • first and “further” layer are used solely to clarify that these layers are distinct.
  • the at least one further layer of particles has preferably a substantially constant thickness or substantially constant weight per unit area.
  • the at least one further layer of particles is vertically below said first layer of particles.
  • the at least one further layer of particles is vertically above said first layer of particles.
  • the further layers are the upper and the lower surface layer of a multi-layered particle board or mat.
  • the particles of the first layer of particles have a greater average particle size (or average particle weight) as compared to the average particle size (or average particle weight) of the further layer of particles.
  • the particle mat has at least first and second areas, said first area having a first thickness (or weight per unit area, kg/m 2 ), said second area having a second thickness (or weight per unit area, kg/m 2 ), wherein said first thickness (or weight per unit area, kg/m 2 ) is greater than said second thickness (or weight per unit area, kg/m 2 ).
  • said first thickness (or weight per unit area, kg/m 2 ) is at least 10%, 20%, 50% or 100% greater than said second thickness (or weight per unit area, kg/m 2 ).
  • the invention further relates to a method of producing a particle board, said method comprising:
  • the particle board according to the invention may be a chipboard, fiber board, an oriented strand board (OSB), MDF board or the like.
  • the particle board has a substantially uniform thickness.
  • the particle board has at least one first area of a first density [kg/m 3 ] and at least one second area of a second density [kg/m 3 ], wherein said first density is greater than said second density.
  • said first density is 10%, 20%, 50% or 100% greater than said second density.
  • the first density is from 550 to 700 kg/m 3 and said second density is from 200 to 500 kg/m 3 .
  • the invention also relates to an arrangement for forming a layer of particles in a particle mat; said layer of particles extending in a longitudinal dimension (Y) and in a lateral dimension (X); said apparatus comprising:
  • the curtain of downfalling particles need not necessarily extend all the way from the particle providing means to a surface of the movable support, e.g., in case the layer of particles is produced on top of a further layer of particles already present on said movable support.
  • the particle providing means is a conveyor belt.
  • the particle providing means can also be an inclined plate, or a chute.
  • the particle providing means has a lateral width substantially equal to the lateral width of said particle mat, or of said movable support.
  • Preferred particle providing means are adapted to produce a particle flow per unit lateral width [kg/s/cm] which is substantially constant over the entire lateral width of the curtain of particles. Furthermore, preferred particle providing means are adapted to produce a substantially constant particle flow [kg/s] over time.
  • the particles are selected from the group consisting of lignocellulosic particles, wood particles, wood chips, and wood fibers.
  • inventions include means for admixing said particles with an adhesive substance.
  • This can be, e.g., a spray nozzle in combination with a mixer.
  • the movable support is a conveyor belt.
  • the movable support can also be in form of a rigid plate, or a movable mesh.
  • the removing means may be in form of, or comprise, at least one conveyor belt, or at least one screw conveyor, or at least one funnel, or at least one air suction line.
  • the particle removing means comprises at least one conveyor belt arranged in parallel orientation to said longitudinal dimension (Y).
  • the particle removing means may be capable of performing a reciprocating movement.
  • particle removing means is adapted to only temporarily remove particles from said curtain of downfalling particles.
  • the particle removing means may be adapted to remove particles from said curtain of downfalling particles (only) at predetermined points in time and for predetermined periods of time.
  • the position of said particle removing means in the lateral dimension (X) is preferably adjustable. This allows for modification of the pattern of first and second areas of distinct thickness in the lateral dimension of the mat.
  • width of said particle removing means in the lateral dimension (X) is adjustable. This provides further means to modify the pattern of first and second areas of distinct thickness in the lateral dimension of the mat.
  • the arrangement includes particle removing means comprising a pair of deflecting means, preferably pivotably connected to said particle removing means.
  • the pair of deflecting means may be, e.g., a pair of inclined plates extending alongside the lateral sides of said particle removing means, preferably being mounted for pivotable movement about an axis parallel to the longitudinal dimension.
  • the arrangement further includes particle spreading means for spreading particles in the longitudinal dimension.
  • the spreading means may be in form of a deck of rotating rollers.
  • the rollers are adapted to rotate about an axis parallel to said lateral dimension X.
  • the deck of rollers preferably comprises 1 to 20, more preferably 3-12 rollers.
  • the spreading means may also include air stream producing means, producing a horizontal air stream spreading particles in the longitudinal dimension.
  • the invention also relates to an apparatus for producing a particle mat, said apparatus comprising at least one arrangement for forming a layer of particles as described above.
  • the apparatus comprises at least one further particle providing means for providing a second curtain of downfalling particles, so as to produce a further layer of particles in said particle mat.
  • the invention further relates to a device for manufacturing a particle board, said device comprising an arrangement of the above defined kind, and further comprises a press for compressing a particle mat to form a particle board.
  • Figure 1 shows a perspective view of an arrangement for forming a layer of particles 2 on a movable support 3, according to the invention.
  • the apparatus is capable of producing a single-layered discontinuous layer 2 by providing particles in form of a curtain of downfalling particles 4 and removing particles from said curtain 4, using particle removing means 6.
  • particles 1 are provided by particle providing means 5 to form of a curtain of downfalling particles 4.
  • Particle providing means 5 in this embodiment, is in form of a conveyor belt providing a preferably constant stream of particles 1 to a terminal edge of the conveyor belt.
  • the particles falling down from particle providing means 5 form a curtain of downfalling particles 4.
  • Movable support 3 is provided in the form of a further conveyor belt.
  • the conveyor belt constituting particle providing means 5 and the conveyor belt constituting movable support 5 are preferably of substantially the same width in the lateral dimension X.
  • the fallen particles form a layer of particles 2 on movable support 3.
  • the layer of particles 2 is transported by movable support 3 along the longitudinal dimension Y, i.e., along the direction of production.
  • an approximately constant flow of downfalling particles in curtain 4 produces a layer of particles of approximately constant thickness [mm] (or weight per unit area [kg/m 2 ]).
  • retractable particle removing means 6 for removing particles from the curtain of downfalling particles 4, when particle removing means are in an extended position.
  • particle removing means 6 are in the form of two retractable conveyor belts.
  • particle removing means 6, however, can also be in the form of a screw conveyor, a funnel, a chute, or a metal plate arranged such that it removes particles from the curtain 4 of downfalling particles.
  • particle removing means 6 can also be in form of suction tube removing particles from curtain 4 through air suction. As indicated by arrows 7, particle removing means 6 are able to reciprocate, i.e., they can assume a retracted position or an extended position. Figure 1 shows removing means 6 in the retracted position. In this position, particle removing means 6 do not intersect or reach into curtain 4 of downfalling particles, hence, particle removing means 6 do not remove any particles from curtain 4 in this position. In the extended position (not shown), particle removing means 6 intersect, or reach into, curtain 4 and remove all or part of the downfalling particles at the lateral positions in which particle removing means 6 intersect, or reach into, curtain 4.
  • a desired pattern of particles can be produced on movable support 3.
  • a discontinuous layer of particles 2 can be produced.
  • the discontinuous layer particle has areas of a first thickness and areas of a reduced thickness.
  • the reduced thickness is preferably zero.
  • the areas of reduced thickness are preferably of rectangular shape.
  • the lateral width (i.e., in the X dimension) of the rectangular areas of reduced thickness is determined by the lateral width of the particle removing means 6.
  • the length (i.e., Y dimension) of the areas of reduced thickness is determined by the time period in which the particle removing means 6 are in the extended state relative to the speed of movable support 3 in the longitudinal direction Y.
  • Figure 2A shows a conventional particle mat 11 having a substantially uniform thickness (or weight per unit area, kg/m 2 ) over its entire area.
  • Figure 2B shows a particle mat 11 producible by methods and apparatuses of the present invention.
  • the mat includes (at least) two layers of particles: a first, discontinuous, layer producible by the arrangement shown in Figure 1 , and a second, continuous, layer having substantially constant thickness (or weight per unit area, kg/m 2 ) over its entire area, producible by conventional methods.
  • a fiber board having areas of a first density and areas of a second, higher, density can be produced.
  • Figure 3 shows various states in a process of producing a layer of particles 2, according to the invention.
  • Figures 3A, 3B, and 3C show schematic side-views at different points in time, during the layer-forming process.
  • Figures 3A, 3B and 3C show different configurations of particle removing means 6, and the resulting pattern of particles in layer 2, in a temporal sequence.
  • particles 1 are transported on particle providing means 5 towards a terminal edge thereof. Particles 1 fall from the terminal edge of particle providing means 5 to form a curtain 4 of downfalling particles. Particles fall onto movable support 3, which in this case is in the form of a conveyor belt. A layer of particles 2 is formed on movable support 3. Particle removing means 6 are present, but in the retracted position. Hence, they do not remove any particles from curtain 4. A continuous layer of particles of approximately constant thickness is thus produced.
  • particle removing means 6 are in the extended position. In this position, particle removing means 6 remove substantially all particles from curtain 4 at the lateral positions in which particle removing means 6 intersect with curtain 4. As a result, void areas with no particles are created in layer 2. It will be appreciated that the void areas are only created at lateral positions vertically below the particle removing means 6. At lateral positions not overlapping particle removing means 6, non-void areas (of normal thickness) are formed. The void areas formed, in one embodiment, are thus rectangular in shape, e.g., when particles are removed from curtain 4 by retractable conveyor belts. The lateral widths of the void areas of mat 11 are determined by lateral width of particle removing means 6. The longitudinal extent of the void areas is determined by the time span during which particle removing means 6 removes particles from curtain 4, relative to the speed by which movable support 3 moves along the longitudinal dimension Y.
  • particle removing means 6 is again in the retracted position. No particles are removed from curtain 4, thus a layer of particles (a non-void area) is formed on movable support 3.
  • various rectangular patterns of void areas in a layer 2 or mat 11 can be created by providing particle removing means 6 of appropriate width (and number), and by timing the extension or retraction of the particle removing means 6 into or from curtain 4, such that a desired pattern is obtained.
  • Figure 4 depicts an apparatus for forming a mat, in this case a multi-layered mat, according to the invention.
  • a particle mat 11 having two layers is produced.
  • Mat 11 comprises a discontinuous layer of particles 2, produced according to the invention, vertically above a further layer of particles 12, which is produced by conventional methods.
  • Further layer 12 is produced from particles provided by further particle providing means 13.
  • Particle providing means 5 and further particle providing means 13, in the embodiment shown, are both in the form of a conveyor belt.
  • Figure 4A depicts a situation in which particle removing means 6 is in a retracted position. In this retracted position particle removing means 6 do not remove particles from curtain 4.
  • Figure 4B shows particle removing means 6 in its extended position.
  • particle removing means 6 remove particles from the curtain 4, thus, no particles reach movable support 3 to contribute to layer 2 of mat 11. Thereby, areas of reduced thickness 15 are produced in mat 11.
  • Figure 4C shows the particle removing means 6 in the retracted position again. Hence, downfalling particles in curtain 4 contribute to layer 2 of mat 11 at this stage.
  • a mat 11 having areas of distinct first and second thickness can be produced.
  • FIG. 5 shows an arrangement of the invention in which the curtain of downfalling particles is spread in the longitudinal dimension (Y) by spreading means 14.
  • Spreading means 14, in this embodiment, are in form of a deck of rotating rollers. The rollers are mounted for rotation about a horizontal axis, arranged in parallel orientation to the lateral dimension, i.e., perpendicular to the direction of movement of movable support 3. Particles fall from particle providing means 5 onto the deck of rollers, where they are spread (or scattered) in the longitudinal dimension.
  • the curtain of particles 4 thus has a certain longitudinal extension of, e.g. greater than 0.5, 1 or 2 meters.
  • Particle removing means 6 are shown in Figures 5A, 5B, 5C in three different positions in which particle removing means 6 remove different amounts of particles from curtain 4. This results in a mat of particles having a first (normal) thickness and including stripes of a reduced thickness, wherein the reduced thickness can be adjusted by varying the longitudinal position of the particle removing means 6.
  • the reduced thickness can be 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, or 90% of the first thickness.
  • the reduced thickness can also be zero.
  • particle removing means 6 are in a retracted position. In this position, no particles are removed from curtain 4. Hence, the resulting layer of particles 2 at the lateral positions overlapping with particle removing means 6 is relatively thick. If particle removing means 6 are fixed/kept in the position shown in Figure 5A , a layer of substantially constant thickness along the lateral and longitudinal dimension will be formed.
  • particle removing means 6 is in a partially extended position. In this position, particle removing means 6 remove a part of the particles falling down in curtain 4, at the lateral positions overlapping with particle removing means 6. The resulting layer of particles 2 at the overlapping lateral positions is thus thinner than in the situation shown in Figure 5A . If particle removing means 6 are fixed/kept in the position shown in Figure 5B , a layer of particles having areas of a first thickness and areas of a second thickness will be formed. If the lateral position and lateral width of the particle removing 6 means does not change, stripes of reduced thickness are produced.
  • Figure 5C is shown the situation in which particle removing means 6 are in a fully extended position. In this position, particle removing means 6 extend all the way through the longitudinal extent of curtain 4. Hence, substantially all particles are removed from curtain 4 at the lateral positions overlapping with particle removing means 6. Hence, the resulting layer of particles formed will have areas of a first thickness and areas of substantially zero thickness, i.e., void areas. Since the position and width of the particle removing 6 means in the lateral dimension does not change, stripes of zero thickness (void stripes) are produced at the lateral positions vertically below particle removing means 6.
  • the arrangement shown in Figures 5A to 5C can be used to produce a layer of particles having longitudinal stripes of distinct thickness.
  • Figure 6 shows the particle removing means 6 according to a preferred embodiment of the invention.
  • Particle removing means 6 includes a conveyor belt and, attached thereto, a pair of deflecting means 17.
  • Deflecting means are in form of a pair of plates, pivotably mounted along opposite sides of particle removing means 6.
  • Deflecting means are pivotable about axis 16, which is arranged parallel to the longitudinal dimension Y.
  • particle removing means 6 of this embodiment is able to perform a reciprocating movement along the longitudinal dimension.

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  • 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)

Claims (15)

  1. Verfahren zum Bilden einer Schicht (2) aus Partikeln in einer Partikelmatte (11); wobei sich die Schicht aus Partikeln (2) in eine Längsrichtung (Y) und in eine Querrichtung(X)erstreckt;
    das Verfahren umfassend:
    (i) Bereitstellen eines beweglichen Trägers (3) zum Abstützen der Schicht aus Partikeln (2) oder der Partikelmatte (11), und Bewegen des beweglichen Trägers (3) in eine Richtung parallel zu der Längsrichtung (Y);
    (ii) Bereitstellen eines Vorhangs aus herabfallenden Partikeln(4), wobei sich der Vorhang von einem Partikelbereitstellungsmittel (5) in Richtung des beweglichen Trägers (3) erstreckt; und
    (iii) Entfernen von Partikeln aus dem Vorhang aus herabfallenden Partikeln(4) an vorbestimmten Positionen in der Querrichtung (X) durch temporäres Positionieren von einem einziehbaren Partikelentfernungsmittel (6) in dem Vorhang aus herabfallenden Partikeln(4);
    wodurch die Schicht aus Partikeln gebildet wird.
  2. Verfahren nach Anspruch 1, wobei die Partikel (1) aus der Gruppe ausgewählt sind, bestehend aus Lignocellulose-Partikeln, Holzpartikeln, Holzschnitzeln und Holzfasern.
  3. Verfahren nach einem der vorhergehenden Ansprüche, wobei das Partikelentfernungsmittel parallel zu der Längsrichtung(Y)angeordnet ist.
  4. Verfahren nach einem der Ansprüche 1 bis 3, wobei das Partikelentfernungsmittel (6) mindestens ein Förderband umfasst.
  5. Verfahren zur Herstellung einer Partikelmatte (11), wobei mindestens eine Schicht (2) der Partikelmatte (11) durch ein Verfahren nach einem der Ansprüche 1 bis 4 hergestellt wird.
  6. Verfahren nach Anspruch 5, wobei die Partikelmatte (11) über mindestens einen ersten (8) und einen zweiten Bereich (9)verfügt, wobei der erste Bereich (8) eine erste Dicke aufweist, wobei der zweite Bereich (9) eine zweite Dicke aufweist, wobei die erste Dicke größer als die zweite Dicke ist.
  7. Verfahren zur Herstellung einer Spanplatte, das Verfahren umfassend:
    (i) Herstellen einer Partikelmatte (11) durch ein Verfahren nach Anspruch 5 oder 6; und
    (ii) Verdichten der Partikelmatte (11) zur Bildung der Spanplatte.
  8. Verfahren nach Anspruch 7, wobei die Spanplatte eine im Wesentlichen gleichmäßige Dicke aufweist.
  9. Anordnung zur Bildung einer Schicht aus Partikeln (2) in einer Partikelmatte (11); wobei sich die Schicht aus Partikeln (2) in eine Längsrichtung (Y) und in eine Querrichtung(X)erstreckt;
    die Vorrichtung umfassend:
    einen beweglichen Träger (3), der in die Längsrichtung (Y) beweglich und angepasst ist, um die Schicht aus Partikeln (2) oder die Partikelmatte (11)abzustützen;
    ein Partikelbereitstellungsmittel (5) zum Bereitstellen eines Vorhangs (4) aus herabfallenden Partikeln, wobei sich der Vorhang aus herabfallenden Partikeln(4) von dem Partikelbereitstellungsmittel (5) in die Richtung des beweglichen Trägers (3) erstreckt; und
    ein einziehbares Partikelentfernungsmittel (6) zum temporären Entfernen von herabfallenden Partikeln aus dem Vorhang aus herabfallenden Partikeln(4) an vorbestimmten Positionen in der Querrichtung (X).
  10. Anordnung nach Anspruch 9, wobei das Partikelentfernungsmittel (6) mindestens ein parallel zu der Längsrichtung (Y) angeordnetes Förderband umfasst.
  11. Anordnung nach Anspruch 10, wobei das Partikelentfernungsmittel (6) ein Paar von Ablenkmitteln (17) umfasst, die mit gegenüberliegenden Seiten des Partikelentfernungsmittels (6) verbunden sind und für eine Schwenkbewegung um eine Achse (16) parallel zu der Längsrichtung (Y) angeordnet sind.
  12. Anordnung nach einem der Ansprüche 9 bis 11, ferner umfassend ein Partikelverteilungsmittel (14), wie beispielsweise eine Gruppe von Walzen, zum Verteilen von Partikeln entlang der Längsrichtung (Y).
  13. Vorrichtung zur Herstellung einer Partikelmatte (11), wobei die Vorrichtung mindestens eine Anordnung nach einem der Ansprüche 9 bis 12 umfasst.
  14. Vorrichtung nach Anspruch 13, wobei die Vorrichtung mindestens ein weiteres Partikelbereitstellungsmittel (13) zum Bereitstellen eines zweiten Vorhangs aus herabfallenden Partikeln (10) umfasst, um eine weitere Schicht aus Partikeln (12) in der Partikelmatte (11) herzustellen.
  15. Vorrichtung zur Herstellung einer Spanplatte, wobei das Gerät eine Vorrichtung nach Anspruch 13 oder 14 umfasst, und ferner eine Presse zum Verdichten der Partikelmatte (11) zur Bildung einer Spanplatte umfasst.
EP12164668.1A 2012-04-18 2012-04-18 Verfahren und Vorrichtung zum Herstellen von Teilchentafeln mit nicht gleichförmiger Dichteverteilung Active EP2653279B1 (de)

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EP12164668.1A EP2653279B1 (de) 2012-04-18 2012-04-18 Verfahren und Vorrichtung zum Herstellen von Teilchentafeln mit nicht gleichförmiger Dichteverteilung
HUE12164668A HUE030928T2 (en) 2012-04-18 2012-04-18 Procedure for making chipboard with uneven grain density
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DE202015102414U1 (de) 2015-05-11 2016-07-12 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zum Streuen eines Vlieses im Zuge der Herstellung von Werkstoffplatten und eine Werkstoffplatte
DE202015102415U1 (de) 2015-05-11 2016-08-15 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zum Streuen eines Vlieses im Zuge der Herstellung von Werkstoffplatten und eine Werkstoffplatte
DE102015107372A1 (de) 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zum Streuen eines Vlieses im Zuge der Herstellung von Werkstoffplatten und eine Werkstoffplatte
DE102015107373A1 (de) 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Verfahren und Vorrichtung zum Streuen eines Vlieses im Zuge der Herstellung von Werkstoffplatten und eine Werkstoffplatte
DE102016112802A1 (de) 2016-07-12 2018-01-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Streukopf und Verfahren zur Herstellung einer Schicht einer Streugutmatte aus streufähigem Material im Zuge der Herstellung von Werkstoffplatten
DE202016103753U1 (de) 2016-07-12 2017-10-13 Dieffenbacher GmbH Maschinen- und Anlagenbau Streukopf zur Herstellung einer Schicht einer Streugutmatte aus streufähigem Material im Zuge der Herstellung von Werkstoffplatten
IT201600129741A1 (it) 2016-12-22 2018-06-22 Imal Srl Pallet monoblocco in legno pressato a capacita' di carico incrementata e relativo impianto di formatura.
DE202017100930U1 (de) 2017-02-20 2018-05-24 Dieffenbacher GmbH Maschinen- und Anlagenbau Abtrageinheit einer Abtrageinrichtung zum Abtragen von Pressgut, Vorrichtung zur Realisierung eines vorgegebenen Flächengewichts einer auf einer Förderbahn aufgestreuten Pressgutmatte, Anlage zur Herstellung von Pressplatten
DE102017103456B4 (de) 2017-02-20 2019-03-14 Dieffenbacher GmbH Maschinen- und Anlagenbau Abtrageinheit einer Abtrageinrichtung zum Abtragen von Pressgut, Vorrichtung zur Realisierung eines vorgegebenen Flächengewichts einer auf einer Förderbahn aufgestreuten Pressgutmatte, Anlage zur Herstellung von Pressplatten und Verfahren zur Realisierung eines vorgegebenen Flächengewichts
DE202017100933U1 (de) 2017-02-20 2018-04-23 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Realisierung eines vorgegebenen Flächengewichts einer auf einem Förderband aufgestreuten Pressgutmatte, bevorzugt im Zuge der Herstellung von Werkstoffplatten
DE102017103457B4 (de) 2017-02-20 2020-01-02 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Realisierung eines vorgegebenen Flächengewichts einer auf einem Förderband aufgestreuten Pressgutmatte, bevorzugt im Zuge der Herstellung von Werkstoffplatten
ES2807541T3 (es) * 2017-10-16 2021-02-23 SWISS KRONO Tec AG Procedimiento y dispositivo para la fabricación de una placa de material compuesto de madera
PT3470191T (pt) * 2017-10-16 2020-05-06 SWISS KRONO Tec AG Processo e dispositivo para produção de uma placa de derivados de madeira

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