EP2626179B1 - Vorrichtung und Verfahren zum Zerstreuen von Partikeln in einer Spanplattenproduktion - Google Patents

Vorrichtung und Verfahren zum Zerstreuen von Partikeln in einer Spanplattenproduktion Download PDF

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Publication number
EP2626179B1
EP2626179B1 EP20120000850 EP12000850A EP2626179B1 EP 2626179 B1 EP2626179 B1 EP 2626179B1 EP 20120000850 EP20120000850 EP 20120000850 EP 12000850 A EP12000850 A EP 12000850A EP 2626179 B1 EP2626179 B1 EP 2626179B1
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EP
European Patent Office
Prior art keywords
rollers
particles
roller
projections
roller array
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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.)
Active
Application number
EP20120000850
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English (en)
French (fr)
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EP2626179A1 (de
Inventor
Ari Hemmilä
Achim Iredi
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.)
Ikea Supply AG
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Ikea Supply AG
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Priority to EP20120000850 priority Critical patent/EP2626179B1/de
Priority to PL12000850T priority patent/PL2626179T3/pl
Publication of EP2626179A1 publication Critical patent/EP2626179A1/de
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Publication of EP2626179B1 publication Critical patent/EP2626179B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens

Definitions

  • the present invention relates to an apparatus according to claim 9 and a method according to claim 6 for scattering particles for forming particle mats in a particle board production process.
  • particleboard surfaces are formed using wind forming heads. Using air separation, it is possible to arrange the particles in a desired order based on the geometry of particles.
  • EP 0 483 742 B1 describes a device for distributing fibrous material, the device being of the mechanical type.
  • the big advantages of this forming unit were the accuracy and evenness of the formed surface layer.
  • This type of forming is ideal for e.g. clean sawdust where all particles have more or less the same geometry.
  • a combination of a wind former and a roller former is described in DE 20 2008 011 509 U1 .
  • an apparatus for scattering particles for forming particle mats in a particle board production process having a source for supplying particles to at least one roller array for spreading the particles onto a mat conveyor, wherein an airflow for scattering the particles onto the at least one roller array is provided above the uppermost roller array.
  • the source is preferably a dosing conveyor.
  • the term "mat” refers to the sorted accumulation of particles before being pressed to a particle board.
  • the term "uppermost” roller array refers to the roller array (in case more than a single roller array is provided) which is reached first by the particles along a particle falling path when the particles fall from the source onto the roller array.
  • roller array refers only to roller arrays which are used for spreading the particles after falling off the source and before falling onto the mat conveyor.
  • a hybrid forming head combining the advantages of mechanical roller former and traditional wind forming head is provided for spreading a surface layer of a particleboard.
  • the main advantages of this system is that the air separation is used to separate fine particles having an optimum shape for the final surface (sanded) of the panels onto the fine rollers.
  • the at least one roller array comprises different rollers adapted to different particle sizes, wherein coarse pattern rollers which are adapted to larger particle sizes compared to fine pattern rollers are positioned closer to a blower for generating the airflow.
  • the airflow blows finer particles farther than coarser particles, such that the finer particles are blown onto fine pattern rollers adapted to the finer particles and the coarser particles are blown onto coarse pattern rollers adapted to the coarser particles.
  • the heavier particles are put exclusively onto coarse pattern rollers. This way, the cubicle particles and minerals are separated deeper from the panel surface by means of coarser rollers, and the board is provided with better surface and paned edge properties.
  • the rollers are provided with projections on their rolling surfaces, and an average of a depth of the projections of the coarse pattern rollers is larger than an average of adjacent depth of the projections of the fine pattern rollers.
  • the rollers are provided with projections on their rolling surfaces, and on at least 90% of each rolling surface, the depth of the projections of a fine pattern roller is at least 0.3mm and smaller than 1.2mm.
  • the rollers Preferably, have a circular cylindrical shape.
  • the term "rolling surface” refers to the curved surface of the cylindrical shape encircling the axis of the cylinder shape.
  • the rollers are provided with projections on their rolling surfaces, and wherein on at least 90% of each rolling surface, the depth of the projections of a coarse pattern roller is at least 1.2mm and at most 5mm.
  • the projections have the shape of pyramids or cones.
  • moisture of the particles is dried by the airflow upstream the uppermost roller array.
  • a method for scattering particles for forming particle mats in a particle board production process comprising the steps of supplying particles by a source onto at least one roller array; providing an airflow above the uppermost roller array, and spreading the particles onto a mat conveyor by means of the at least one roller array.
  • the method further comprising the step of blowing finer particles further than coarser particles, such that the finer particles are blown on fine pattern rollers adapted to the finer particles and the coarser particles are blown on coarse pattern rollers adapted to the coarser particles.
  • Fig. 1 schematically illustrates the apparatus for scattering particles according to the invention. Flakes or particles are introduced into the apparatus by means of a dosing conveyor 1 acting as a source, the dosing conveyor 1 being formed as an endless belt conveyor. Alternatively, the source could also be a shute. At the end of the dosing conveyor 1, from which the particles fall off the dosing conveyor 1, there is provided a drop roller 2 for dosing and evening the particle stream on the dosing conveyor 1.
  • the dosing conveyor 1 Underneath, with respect to gravity force, the dosing conveyor 1, there is arranged a wind chamber 3, an opening 4 of which is provided on its upper side in a dip line with respect to the end of the dosing conveyor 1 such that the particles falling off the dosing conveyor 1 drop through the opening 4 into the wind chamber 3.
  • the wind chamber is often referred to as wind forming head.
  • the wind chamber 3 is provided with a blower 5 for generating an airstream streaming through the wind chamber 3 to a suction point 6 of the wind chamber 3 in a substantially horizontal direction.
  • the blower 5 is preferably located at an end of the wind chamber 3 at which also the opening 4 is located.
  • roller array 7 is arranged onto which the particles coming from the dosing conveyor 1 drop after being scattered by the airstream.
  • the rollers of the roller array 7 are cylindrical rollers having later described projections formed on their cylindrical outer surfaces.
  • the rollers are arranged besides each other along a horizontal direction.
  • the airstream created by the blower 5 the fine, flat and fibrous material is blown onto fine pattern rollers 9. The coarser, cubicle and heavier particles will drop on coarse pattern rollers 9.
  • Fig. 3a and 3b illustrates a roller and its roller pattern used as fine pattern rollers 8 and coarse pattern roller 9, wherein the fine pattern rollers distinguish from the coarse pattern rollers by the pattern dimensions.
  • These rollers comprise projections on their rolling surfaces which is the surface formed by the circumference of the circular cylindrical outer surface shown in Fig. 3a .
  • the projections are in form of pyramids or cones.
  • These projections are manufactured by providing the roller with grooves 12 extending along the rolling surface in a spiral shape.
  • the depth 13 of the grooves 12 is at least 0.3mm and less than 1.2 mm for the fine pattern rollers 8, and at least 1.2mm and at most 5 mm for the coarse pattern rollers 8.
  • Fig. 3b shows a front view (view from the left or right side of Fig.
  • the grooves 12 for forming the projections are formed in counter directions.
  • a plurality of right handed grooves 12a is formed in the rolling surface in a spiral shape and in parallel to each other.
  • Another plurality of left handed grooves 12b is formed in the rolling surface in a spiral shape and in parallel to each other.
  • the plurality of right handed grooves 12a forms an angle on the rolling surface with the plurality of left handed grooves 12b, such that they extend in counter directions.
  • the roller array 7 comprises a plurality of rollers wherein a plurality of these rollers which are closest to the blower 5 are coarse pattern rollers 9 and wherein the plurality of these rollers which are farthest away from the blower 5 are fine pattern rollers 8.
  • the right half of the rollers of the roller array 7 are coarse pattern rollers 9 and the left half of the rollers of the roller array 7 are fine pattern rollers 9.
  • the roller array 7 comprises not only two, but a plurality of different rollers, such that for example the roller patter becomes successively smaller with an increasing distance from the blower 5, or it would be possible to provide not only two, but three, four, five, six, etc.
  • the pattern on the rollers 8, 9 is not limited to the above mentioned projections, but also other roller patterns could be used as known from the state of the art. In both roller beds it is possible to mix different roller patterns within the specified range. Also the gaps between the rollers 8, 9 could vary depending on the usage as coarse pattern roller 9 or fine pattern roller 8.
  • the rollers of the roller array 7 rotate such that they rotate on their upper side against the direction of the airstream. After the particles drop onto the rollers 8, 9, they fall through the gap between the rollers onto a mat conveyor 10 which is in the form of an endless conveyor belt. The particles for a so-called mat on this mat conveyor 10, which is conveyed to a pressing apparatus for pressing a particle board.
  • evening elements 11 such as a screen, a spiral-shaped pin-type roller, a runged wheel type roller ("hamster” type roller) or disks, may be used to even the airstream and to prevent turbulences.
  • Preferred pin-type rollers are runged wheel type rollers, and spiral-shaped pin-type rollers.
  • a runged wheel type roller is a roller having a plurality of bars or pins in parallel to the axis of the roller, the bars or pins being arranged such that they all have the same distance to the axis and such that they are arranged in regular intervals on a circle encircling the axis.
  • a runged wheel type roller shall be understood as being a pin-type roller, in which multiple pins are arranged such that, in a cross-sectional plane, the multiple pins lie on preferably one, optionally multiple, concentric circle(s) around the axis of rotation of the roller.
  • runged wheel type roller can all be parallel to the axis of rotation of the roller, but the runged wheel type roller can also be twisted, such that, e.g., the pins of the roller angled with respect to the axis of rotation, or the individual pins may describe a helical path from one end of the roller to the other end.
  • runged wheel type roller are well known from, e.g., US 3,487,911 .
  • a screen is formed as a woven screen mesh from wires. The size of those screen openings is typically between 2 by 2 mm to 10 by 10 mm depending on the application. The thickness of those wires could also vary.
  • roller array 7 only a single roller array 7 is provided. However it should be noted that also more than one roller array could be provided such that an additional roller array for spreading the particles is for example provided in between the illustrated roller array 7 and the mat conveyor 10.

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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 (7)

  1. Vorrichtung zum Streuen von Teilchen zur Bildung von Spanmatten in einem Spanplattenherstellungsprozess, wobei die Vorrichtung eine Quelle (1) für die Zufuhr von Teilchen zu zumindest einer Walzenanordnung (7) zum Verteilen der Teilchen auf einem Mattenförderer (10) aufweist, dadurch gekennzeichnet, dass eine Luftströmung zum Streuen der Teilchen auf die zumindest eine Walzenanordnung (7) oberhalb der obersten Walzenanordnung (7) bereitgestellt ist, wobei die zumindest eine Walzenanordnung (7) verschiedene an verschiedene Teilchengrößen angepasste Walzen (8, 9) umfasst, wobei die Walzen (9), die im Vergleich zu den restlichen Walzen (8) der zumindest einen Walzenanordnung (7) an größere Teilchengrößen angepasst sind, näher an einem an einem Gebläse (5) zur Erzeugung des Luftstroms angeordnet sind.
  2. Vorrichtung nach Anspruch 1, wobei die Walzen (8, 9) an ihren Walzflächen mit Vorsprüngen versehen sind, und wobei ein Durchschnitt einer Tiefe der Vorsprünge von Grobmusterwalzen (9) größer als ein Durchschnitt einer Tiefe der Vorsprünge von Feinmusterwalzen (8) ist.
  3. Vorrichtung nach Anspruch 2, wobei die Walzen (8, 9) an ihren Walzflächen mit Vorsprüngen versehen sind, und wobei an zumindest 90 % einer jeden Walzfläche die Tiefe der Vorsprünge einer Feinmusterwalze zumindest 0,3 mm beträgt und kleiner als 1,2 mm ist.
  4. Vorrichtung nach Anspruch 2 oder 3, wobei die Walzen (8, 9) an ihren Walzflächen mit Vorsprüngen versehen sind, und wobei an zumindest 90 % einer jeden Walzfläche die Tiefe der Vorsprünge einer Grobmusterwalze zumindest 1,2 mm und höchstens 5 mm beträgt.
  5. Vorrichtung nach einem der Ansprüche 2 bis 4, wobei die Vorsprünge die Form von Pyramiden oder Kegeln aufweisen.
  6. Verfahren zum Streuen von Teilchen zur Bildung von Spanmatten in einem Spanplattenherstellungsprozess, wobei das Verfahren folgende Schritte umfasst:
    Zuführen von Teilchen durch eine Quelle (1) auf zumindest eine Walzenanordnung (7);
    Bereitstellen einer Luftströmung oberhalb der obersten Walzenanordnung (7),
    Verteilen der Teilchen auf einen Mattenförderer (10) mithilfe der zumindest einen Walzenanordnung (7), und
    Blasen von feineren Teilchen über eine längere Strecke als gröbere Teilchen, sodass die feineren Teilchen auf an die feineren Teilchen angepasste Feinmusterwalzen (8) geblasen werden und die gröberen Teilchen auf an die gröberen Teilchen angepasste Grobmusterwalzen (9) geblasen werden, wobei die Feinmusterwalzen (8) sich von den Grobmusterwalzen unterscheiden (9).
  7. Verfahren nach Anspruch 6, wobei Feuchtigkeit der Teilchen durch die Luftströmung stromaufwärts der obersten Walzenanordnung (7) getrocknet wird.
EP20120000850 2012-02-09 2012-02-09 Vorrichtung und Verfahren zum Zerstreuen von Partikeln in einer Spanplattenproduktion Active EP2626179B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20120000850 EP2626179B1 (de) 2012-02-09 2012-02-09 Vorrichtung und Verfahren zum Zerstreuen von Partikeln in einer Spanplattenproduktion
PL12000850T PL2626179T3 (pl) 2012-02-09 2012-02-09 Urządzenie i sposób rozrzucania cząstek w produkcji płyt wiórowych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20120000850 EP2626179B1 (de) 2012-02-09 2012-02-09 Vorrichtung und Verfahren zum Zerstreuen von Partikeln in einer Spanplattenproduktion

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EP2626179A1 EP2626179A1 (de) 2013-08-14
EP2626179B1 true EP2626179B1 (de) 2015-05-13

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PL (1) PL2626179T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3966007A4 (de) * 2019-05-07 2023-02-08 IKEA Supply AG Vorrichtung und verfahren zur herstellung von holzbasierten platten

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH436124A (de) 1966-06-02 1967-05-15 Fahrni Fred Vorrichtung zum Verteilen von schüttfähigem Gut auf eine Unterlage
US5012933A (en) * 1988-02-12 1991-05-07 Acrowood Corporation Machine and method for sorting out over-thick wood chips
FI90746C (fi) 1990-10-30 1994-03-25 Sunds Defibrator Loviisa Oy Laitteisto kuitujen, esimerkiksi lastujen sirottelemiseksi
DE10206595A1 (de) 2002-02-15 2003-08-28 Dieffenbacher Gmbh Maschf Streustation zum homogenen Streuen von beleimten Streugütern insbesondere Holzspänen
FI117129B (fi) * 2004-05-19 2006-06-30 Metso Panelboard Oy Menetelmä ja laitteisto lastujen sirottelemiseksi
DE102006038183A1 (de) * 2006-08-14 2008-02-21 Dieffenbacher Gmbh + Co. Kg Verfahren und Streumaschine zur vollständigen oder schichtweisen Herstellung einer Streugutmatte
FI122575B (fi) 2006-12-04 2012-03-30 Dieffenbacher Panelboard Oy Laitteisto kuitujen, kuten lastujen sirottelemiseksi
DE102006062396A1 (de) * 2006-12-25 2008-06-26 Dieffenbacher Gmbh + Co. Kg Verfahren und Formstation zur Bildung einer Streugutmatte im Zuge der Herstellung von Werkstoffplatten
DE202008011509U1 (de) * 2008-08-29 2008-10-30 Binos Gmbh Vorrichtung zur Streuung eines Vlieses

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PL2626179T3 (pl) 2015-12-31
EP2626179A1 (de) 2013-08-14

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