EP2087976B1 - Device and method for distributing granular material into mats - Google Patents

Device and method for distributing granular material into mats Download PDF

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Publication number
EP2087976B1
EP2087976B1 EP09000831A EP09000831A EP2087976B1 EP 2087976 B1 EP2087976 B1 EP 2087976B1 EP 09000831 A EP09000831 A EP 09000831A EP 09000831 A EP09000831 A EP 09000831A EP 2087976 B1 EP2087976 B1 EP 2087976B1
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EP
European Patent Office
Prior art keywords
chute
granular material
magnetic
dispersing
grit
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EP09000831A
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German (de)
French (fr)
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EP2087976A1 (en
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Kronotec AG
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Kronotec AG
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Priority to PL09000831T priority Critical patent/PL2087976T3/en
Publication of EP2087976A1 publication Critical patent/EP2087976A1/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off

Definitions

  • the invention relates to a device for scattering of grit, in particular of wood chips, wood fibers or the like, to grit mats with a scattering belt and a grit hopper with a discharge device for spreading the grit on the scattering band, in the area of a arranged at an angle to the horizontal chute is provided ,
  • Such a device is from the EP 0 511 425 A1 known.
  • a scattering device and a method for forming a grit mat is, for example, from DE 10 2004 010 898 A1 or the EP 1 810 805 A1 known.
  • metal particles are repeatedly introduced into the production process. These result in the production process to damage the equipment or at least to damage in the produced wood-based panel. The resulting production interruptions and possibly repairs of the equipment are costly and time consuming.
  • permanent magnetic or electromagnetic separation devices are present in many places within a production line. These ensure that ferromagnetic foreign bodies are rejected and thus the subsequent production facilities are not damaged. This sorting out of metal particles is only possible effectively before the actual scattering, since according to the Scattering these magnetic devices do not work very effectively, since metal particles are difficult to detect or remove in a relatively thick litter mat. These therefore enter the production process and lead to the aforementioned interruptions and damage to the equipment.
  • the invention is therefore based on the object to provide a scattering device which has an effective metal separator.
  • the invention achieves the object according to claim 1 or 2, characterized in that the provided in the discharge device chute is magnetic or that the chute is designed as an electromagnet.
  • the invention relates to a method for depositing metal particles according to claim 5.
  • the grit which leaves the grit hopper via the discharge device falls during operation of the device according to the invention onto the chute arranged in the area of the discharge device.
  • the non-magnetic grit such as wood chips or wood fibers, slips over the chute and is scattered on the scattering band. Before that, for example, it is routed via distributors and orienters, whereby a uniform distribution and homogeneous orientation of the grit is ensured.
  • metal particles are in the material to be spread, they will also hit the magnetic chute after leaving the spreading material bunker. Due to the magnetic interaction between the metal particles and the magnetic chute, the particles are held on the chute and do not get into the further production process. You can therefore not get into the litter mat. About the discharge device at the output of the grit bunker, the individual particles are scattered in the grit very strong. Therefore, the metal particles contained in the grit hit the chute and are held to a very large extent.
  • the chute is designed as an electromagnet, the cleaning of the chute, for example during maintenance downtime of the device, is easily possible.
  • the slide loses its magnetic properties.
  • the chute is made of a permanent magnetic material, for example a magnesium-neodymium alloy. Compared to the electromagnet solution, this embodiment saves power and thus costs.
  • the cleaning of the permanent magnetic chute can be done for example by means of a simple, non-magnetic stainless steel blade.
  • the angle of the magnetic chutes is infinitely adjustable.
  • the fall angle of the scattering material and thus the quality of the scattered scattered mat can be controlled.
  • the residence time ie the time spent by individual particles from the grit on the slide, can be varied by the fall angle, so that any metal particles contained in the grit are held with a greater probability.
  • FIG. 1 shows a side view of a device according to the invention 1.
  • the scattered grit 2 is located in the grit hopper 3. It is transported via a bunker bottom band 4 in the direction of the order front of the grit hopper 3. There it falls on the magnetic chute 6, before it is then spread over distributor 7 and Orienter 8 on the scattering belt 9.
  • About the scattering belt 9 scattered from the grit 2 scattering mat is further production facilities, such as presses, Beklaklas driving, or dividing saws supplied.
  • About the angle ⁇ between the horizontal H and the magnetic chute 6 of the falling angle of the material to be spread 2 on the distributor 7 and thus the residence time of the material to be spread 2 on the magnetic chute 6 is controlled. The smaller the angle ⁇ , the longer the grit 2 is in contact with the magnetic chute 6 and the better metal particles can be removed from the grit 2.
  • FIG. 2 shows a simplified representation of a magnetic chute 6, as used in a device according to the invention. It is arranged at the discharge of a spreading material bunker, not shown, at an angle ⁇ to the horizontal H.
  • the magnetic chute 6 is detectably pivotable along the arrows P. This means that it can be arranged at any angle ⁇ . This can, for example, in dependence on the amount of scattered material to be scattered 2, the speed of the scattering belt 9 and the Size of the individual particles in the grit 2 changed and adapted to the particular circumstances.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sorting Of Articles (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Discharge Of Articles From Conveyors (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Spray Control Apparatus (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • General Preparation And Processing Of Foods (AREA)

Abstract

A unit (5) extracts wood chips, fibers or other similar material (2) from a bunker (3). The material is scattered onto a conveyor belt (9) to make a particle board. In novel design, the chute (6) is magnetic or can be magnetized. It is constructed as an electromagnet. Alternatively it is a permanently-magnetic material, being especially magnesium-neodymium based. The angle of the chute (alpha ) is adjustable.

Description

Die Erfindung betrifft eine Vorrichtung zum Streuen von Streugut, insbesondere von Holzspänen, Holzfasern oder ähnlichem, zu Streugutmatten mit einem Streuband und einem Streugutbunker mit einer Austragsvorrichtung zum Aufstreuen des Streugutes auf das Streuband, in deren Bereich eine in einem Winkel zur Horizontalen angeordnete Rutsche vorgesehen ist.The invention relates to a device for scattering of grit, in particular of wood chips, wood fibers or the like, to grit mats with a scattering belt and a grit hopper with a discharge device for spreading the grit on the scattering band, in the area of a arranged at an angle to the horizontal chute is provided ,

Eine solche Vorrichtung ist aus der EP 0 511 425 A1 bekannt. Eine Streuvorrichtung und ein Verfahren zur Bildung einer Streugutmatte ist beispielsweise aus der DE 10 2004 010 898 A1 oder der EP 1 810 805 A1 bekannt.Such a device is from the EP 0 511 425 A1 known. A scattering device and a method for forming a grit mat is, for example, from DE 10 2004 010 898 A1 or the EP 1 810 805 A1 known.

Aus der EP 0956903 A2 ist eine Reinigungsanlage zum Reinigen von Hackschnitzeln bekannt, die über einen mit einer Magnetspule versehenen Eisenabscheider verfügt.From the EP 0956903 A2 a cleaning system for cleaning wood chips is known which has a provided with a magnetic coil iron separator.

In der Produktion von Spanplatten und OSB (Oriented Strand Board) kommt es immer wieder dazu, dass Metallpartikel in den Produktionsprozess eingeschleust werden. Diese führen im Produktionsprozess zu Beschädigungen der Anlagen oder zumindest zu Schäden in der hergestellten Holzwerkstoffplatte. Die dadurch nötigen Produktionsunterbrechungen und ggf. Reparaturen der Anlagen sind kosten- und zeitintensiv. Um Metallpartikel aus dem Produktionsprozess herausfiltern zu können, sind an vielen Stellen innerhalb einer Produktionslinie entweder dauermagnetische oder elektromagnetische Abscheidevorrichtungen vorhanden. Diese sorgen dafür, dass ferromagnetische Fremdkörper ausgesondert und so die nachfolgenden Produktionseinrichtungen nicht beschädigt werden. Dieses Aussortieren von Metallpartikeln ist nur vor der eigentlichen Streuung effektiv möglich, da nach der Streuung diese magnetischen Einrichtungen nicht sehr effektiv arbeiten, da in einer vergleichsweise dicken Streumatte Metallpartikel nur schwer zu detektieren bzw. zu entfernen sind. Diese gelangen daher in den Produktionsprozess und führen zu den bereits genannten Unterbrechungen und Beschädigungen der Anlagen.In the production of chipboard and OSB (Oriented Strand Board), metal particles are repeatedly introduced into the production process. These result in the production process to damage the equipment or at least to damage in the produced wood-based panel. The resulting production interruptions and possibly repairs of the equipment are costly and time consuming. In order to be able to filter out metal particles from the production process, permanent magnetic or electromagnetic separation devices are present in many places within a production line. These ensure that ferromagnetic foreign bodies are rejected and thus the subsequent production facilities are not damaged. This sorting out of metal particles is only possible effectively before the actual scattering, since according to the Scattering these magnetic devices do not work very effectively, since metal particles are difficult to detect or remove in a relatively thick litter mat. These therefore enter the production process and lead to the aforementioned interruptions and damage to the equipment.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Streuvorrichtung bereitzustellen, die über einen effektiven Metallabscheider verfügt.The invention is therefore based on the object to provide a scattering device which has an effective metal separator.

Die Erfindung löst die Aufgabe gemäß Anspruch 1 oder 2 dadurch, dass die im Bereich der Austragsvorrichtung vorgesehene Rutsche magnetisch ist oder dass die Rutsche als Elektromagnet ausgebildet ist.The invention achieves the object according to claim 1 or 2, characterized in that the provided in the discharge device chute is magnetic or that the chute is designed as an electromagnet.

Des Weiteren betrifft die Erfindung ein Verfahren zum Abscheiden von Metallpartikeln gemäß Anspruch 5.Furthermore, the invention relates to a method for depositing metal particles according to claim 5.

Das den Streugutbunker über die Austragsvorrichtung verlassende Streugut fällt beim Betrieb der erfindungsgemäßen Vorrichtung auf die im Bereich der Austragsvorrichtung angeordnete Rutsche. Dadurch wird der Pfeilwinkel des Streugutes verändert. Das nichtmagnetische Streugut, beispielsweise Holzspäne oder Holzfasern, rutscht über die Rutsche hinweg und wird auf das Streuband aufgestreut. Vorher wird es beispielsweise über Verteiler und Orienter geführt, wodurch eine gleichmäßige Verteilung und homogene Ausrichtung des Streugutes gewährleistet wird.The grit which leaves the grit hopper via the discharge device falls during operation of the device according to the invention onto the chute arranged in the area of the discharge device. As a result, the sweep angle of the material to be spread is changed. The non-magnetic grit, such as wood chips or wood fibers, slips over the chute and is scattered on the scattering band. Before that, for example, it is routed via distributors and orienters, whereby a uniform distribution and homogeneous orientation of the grit is ensured.

Befinden sich Metallpartikel im Streugut, treffen auch diese nach Verlassen des Streugutbunkers auf die magnetische Rutsche. Durch die magnetische Wechselwirkung zwischen den Metallpartikeln und der magnetischen Rutsche werden die Partikel auf der Rutsche festgehalten und geraten nicht in den weiteren Produktionsablauf. Sie können daher auch nicht in die Streumatte gelangen. Über die Austragsvorrichtung am Ausgang des Streugutbunkers werden die einzelnen Partikel im Streugut stark vereinzelt. Daher treffen die im Streugut enthaltenen Metallpartikel auf die Rutsche und werden zu einem sehr großen Anteil festgehalten.If metal particles are in the material to be spread, they will also hit the magnetic chute after leaving the spreading material bunker. Due to the magnetic interaction between the metal particles and the magnetic chute, the particles are held on the chute and do not get into the further production process. You can therefore not get into the litter mat. About the discharge device at the output of the grit bunker, the individual particles are scattered in the grit very strong. Therefore, the metal particles contained in the grit hit the chute and are held to a very large extent.

Wenn die Rutsche als Elektromagnet ausgestaltet ist, ist die Reinigung der Rutsche, etwa bei Wartungsstillständen der Vorrichtung, leicht möglich.If the chute is designed as an electromagnet, the cleaning of the chute, for example during maintenance downtime of the device, is easily possible.

Wird der Strom, der den Elektromagneten der Rutsche betreibt, abgeschaltet, verliert die Rutsche ihre magnetischen Eigenschaften. Die bis zu diesem Zeitpunkt an der Rutsche festgehaltenen Metallpartikel lösen sich und können einfach entsorgt werden.If the current that drives the electromagnet of the slide is switched off, the slide loses its magnetic properties. The metal particles held on the chute until then dissolve and can easily be disposed of.

In einer anderen vorteilhaften Ausgestaltung besteht die Rutsche aus einem permanentmagnetischen Material, beispielsweise einer Magnesium-Neodym-Legierung. Im Vergleich zur Elektromagnet-Lösung spart diese Ausführungsform Strom und damit Kosten. Die Reinigung der permanentmagnetischen Rutsche kann beispielsweise mittels einer einfachen, nichtmagnetischen Edelstahlschaufel geschehen.In another advantageous embodiment, the chute is made of a permanent magnetic material, for example a magnesium-neodymium alloy. Compared to the electromagnet solution, this embodiment saves power and thus costs. The cleaning of the permanent magnetic chute can be done for example by means of a simple, non-magnetic stainless steel blade.

Besonders vorteilhafter Weise ist der Winkel der magnetischen Rutschen stufenlos einstellbar. Dadurch kann auch der Fallwinkel des Streugutes und damit die Qualität der aufgestreuten Streumatte gesteuert werden. Zudem kann die Verweildauer, also die Zeit, die einzelne Partikel aus dem Streugut auf der Rutsche verbringen, durch den Fallwinkel variiert werden, sodass ggf. im Streugut enthaltene Metallpartikel mit einer größeren Wahrscheinlichkeit festgehalten werden.Particularly advantageously, the angle of the magnetic chutes is infinitely adjustable. As a result, the fall angle of the scattering material and thus the quality of the scattered scattered mat can be controlled. In addition, the residence time, ie the time spent by individual particles from the grit on the slide, can be varied by the fall angle, so that any metal particles contained in the grit are held with a greater probability.

Anhand einer Zeichnung wird ein Ausführungsbeispiel der Erfindung näher erläutert.Reference to a drawing, an embodiment of the invention is explained in detail.

Es zeigt:

Figur 1
eine schematische Seitenansicht einer erfindungsgemäßen Vorrichtung
und
Figur 2
eine vereinfachte Darstellung einer Rutsche einer erfindungsgemäßen Vorrichtung.
It shows:
FIG. 1
a schematic side view of a device according to the invention
and
FIG. 2
a simplified representation of a slide of a device according to the invention.

Figur 1 zeigt eine Seitenansicht einer erfindungsgemäßen Vorrichtung 1. Das aufzustreuende Streugut 2 befindet sich im Streugutbunker 3. Es wird über ein Bunkerbodenband 4 in Richtung der Auftragsfront des Streugutbunkers 3 befördert. Dort fällt es auf die magnetische Rutsche 6, bevor es dann über Verteiler 7 und Orienter 8 auf das Streuband 9 aufgestreut wird. Über das Streuband 9 wird die aus dem Streugut 2 aufgestreute Streumatte weiteren Produktionseinrichtungen, wie beispielsweise Pressen, Besäumungseinrichtungen oder Aufteilsägen, zugeführt. Über den Winkel α zwischen der Horizontalen H und der magnetischen Rutsche 6 wird der Fallwinkel des Streugutes 2 auf die Verteiler 7 und damit auch die Verweildauer des Streugutes 2 auf der magnetischen Rutsche 6 gesteuert. Je kleiner der Winkel α ist, desto länger ist das Streugut 2 in Kontakt mit der magnetischen Rutsche 6 und desto besser können Metallpartikel aus dem Streugut 2 entfernt werden. FIG. 1 shows a side view of a device according to the invention 1. The scattered grit 2 is located in the grit hopper 3. It is transported via a bunker bottom band 4 in the direction of the order front of the grit hopper 3. There it falls on the magnetic chute 6, before it is then spread over distributor 7 and Orienter 8 on the scattering belt 9. About the scattering belt 9 scattered from the grit 2 scattering mat is further production facilities, such as presses, Besäumungseinrichtungen or dividing saws supplied. About the angle α between the horizontal H and the magnetic chute 6 of the falling angle of the material to be spread 2 on the distributor 7 and thus the residence time of the material to be spread 2 on the magnetic chute 6 is controlled. The smaller the angle α, the longer the grit 2 is in contact with the magnetic chute 6 and the better metal particles can be removed from the grit 2.

Figur 2 zeigt eine vereinfachte Darstellung einer magnetischen Rutsche 6, wie sie in einer erfindungsgemäßen Vorrichtung Verwendung findet. Sie ist an der Austragvorrichtung eines nicht gezeigten Streugutbunkers im Winkel α zur Horizontalen H angeordnet. Die magnetische Rutsche 6 ist entlang der Pfeile P feststellbar verschwenkbar. Das bedeutet, dass sie in einem beliebigen Winkel α angeordnet werden kann. Dieser kann beispielsweise in Abhängigkeit von der Menge des aufzustreuenden Streugutes 2, der Geschwindigkeit des Streubandes 9 und der Größe der einzelnen Partikel im Streugut 2 verändert und an die jeweiligen Gegebenheiten angepasst werden. FIG. 2 shows a simplified representation of a magnetic chute 6, as used in a device according to the invention. It is arranged at the discharge of a spreading material bunker, not shown, at an angle α to the horizontal H. The magnetic chute 6 is detectably pivotable along the arrows P. This means that it can be arranged at any angle α. This can, for example, in dependence on the amount of scattered material to be scattered 2, the speed of the scattering belt 9 and the Size of the individual particles in the grit 2 changed and adapted to the particular circumstances.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

HH
Horizontalehorizontal
PP
Pfeilearrows
αα
Winkelangle
11
Vorrichtungcontraption
22
Streugutgrit
33
Streugutbunkergrit bunker
44
BunkerbodenbandBunker floor belt
55
AustragsfrontAustragsfront
66
magnetische Rutschemagnetic slide
77
Verteilerdistributor
88th
Orienterorienter
99
Streubandscatter band

Claims (7)

  1. Device for dispersing granular material (2) to form granular material mats, with a dispersing belt (9) and a granular material bunker (3) with a discharge device (5) for dispersing the granular material (2) on the dispersing belt (9), in the region of which a chute (6) arranged at an angle (α) to the horizontal (H) is provided, characterised in that the chute (6) is magnetic.
  2. Device for dispersing granular material (2) to form granular material mats, with a dispersing belt (9) and a granular material bunker (3) with a discharge device (5) for dispersing the granular material (2) on the dispersing belt (9), in the region of which a chute (6) arranged at an angle (α) to the horizontal (H) is provided, characterised in that the chute (6) is configured as an electromagnet.
  3. Device according to claim 1, characterised in that the chute (6) consists of a permanent-magnet material.
  4. Device according to claim 1, 2 or 3, characterised in that the angle (α) of the chute (6) can be adjusted.
  5. Method for separating metal particles from a granular material (2) provided according to any one of claims 1 to 4 in a dispersing device (1), characterised in that the granular material (2) is fed to a magnetic chute (6), so that owing to the magnetic interaction between the metal particles and the magnetic chute (6), the metal particles are retained on the chute (6).
  6. Method according to claim 5, characterised in that the granular material (2) is uniformly distributed and homogeneously oriented before it is fed to the chute (6).
  7. Method according to claim 5 or 6, characterised in that the non-magnetic granular material (2) slides over the chute (6) and is dispersed on a dispersing belt (9).
EP09000831A 2008-02-07 2009-01-22 Device and method for distributing granular material into mats Active EP2087976B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09000831T PL2087976T3 (en) 2008-02-07 2009-01-22 Device and method for distributing granular material into mats

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008007950A DE102008007950B3 (en) 2008-02-07 2008-02-07 Plant scattering wood chips or fibers onto conveyor to make e.g. chipboard or orientated strand board, includes magnetic distribution chute

Publications (2)

Publication Number Publication Date
EP2087976A1 EP2087976A1 (en) 2009-08-12
EP2087976B1 true EP2087976B1 (en) 2010-12-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09000831A Active EP2087976B1 (en) 2008-02-07 2009-01-22 Device and method for distributing granular material into mats

Country Status (5)

Country Link
EP (1) EP2087976B1 (en)
AT (1) ATE492382T1 (en)
DE (2) DE102008007950B3 (en)
ES (1) ES2357533T3 (en)
PL (1) PL2087976T3 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2021220C (en) * 1990-07-16 1996-10-22 Glenn Earl Howes Magnetic trap assembly
EP0511425B1 (en) * 1991-04-30 1995-10-04 Carl Schenck Ag Device for continously laying a fibrous, felted mat
DE19539499C2 (en) * 1995-10-24 1998-05-07 Gres Josef Process and device for treating and shredding waste wood
DE19821437A1 (en) 1998-05-13 1999-11-18 Maier Zerkleinerungstech Gmbh Plant for cleaning wood chips
WO2003053588A1 (en) * 2001-12-20 2003-07-03 Rampage Ventures Inc. Removable magnetic wedge separator
DE102004010898B4 (en) * 2004-03-06 2005-12-01 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Process for scattering particles particularly wooden chips, shavings or similar onto the scattering belt of a conveyor in production of particle mats uses calculation of belt and mat weights to set desirable volume flow
JP2006240234A (en) * 2005-03-07 2006-09-14 Hideaki Ito Manufacturing method of plate-like material
DE102006002880A1 (en) * 2006-01-20 2007-07-26 Dieffenbacher Gmbh + Co. Kg Method and forming station for forming a spreading material mat in the course of the production of wood-based panels
DE102006004779A1 (en) * 2006-02-02 2007-08-09 Technocad Service Gmbh & Co. Kg Method for machine production of product plates with sound and heat insulating characteristics, involves completely locking, stabilized insulation around compressed raw product from biologically regenerating raw materials

Also Published As

Publication number Publication date
ATE492382T1 (en) 2011-01-15
DE502009000228D1 (en) 2011-02-03
PL2087976T3 (en) 2011-05-31
ES2357533T3 (en) 2011-04-27
EP2087976A1 (en) 2009-08-12
DE102008007950B3 (en) 2008-11-06

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