EP0069162A1 - Method and apparatus for controlling the density distribution of a dispersed particle mat - Google Patents

Method and apparatus for controlling the density distribution of a dispersed particle mat Download PDF

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Publication number
EP0069162A1
EP0069162A1 EP81105215A EP81105215A EP0069162A1 EP 0069162 A1 EP0069162 A1 EP 0069162A1 EP 81105215 A EP81105215 A EP 81105215A EP 81105215 A EP81105215 A EP 81105215A EP 0069162 A1 EP0069162 A1 EP 0069162A1
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EP
European Patent Office
Prior art keywords
width
discharge rollers
chip
bunker
suction
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Granted
Application number
EP81105215A
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German (de)
French (fr)
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EP0069162B1 (en
Inventor
Wolfgang Bürkner
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Carl Schenck AG
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Carl Schenck AG
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Publication date
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Priority to DE8181105215T priority Critical patent/DE3170270D1/en
Priority to EP81105215A priority patent/EP0069162B1/en
Priority to FI820641A priority patent/FI73912C/en
Priority to US06/392,334 priority patent/US4504182A/en
Publication of EP0069162A1 publication Critical patent/EP0069162A1/en
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Publication of EP0069162B1 publication Critical patent/EP0069162B1/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
    • B27N3/146—Controlling mat weight distribution

Definitions

  • the invention relates to a method and a device for influencing the density distribution of a chip fleece to be scattered over its scattering width.
  • the problem of uniform scattering has been known for a long time, for example in DE-PS 2214 900 a spreading device for compensating for different basis weights in the transverse direction of chip or fiber fleeces or the like, for the production of chipboard, fiberboard or the like with one below the spreading device and relative to this movable mold base with a flexible metering conveyor belt arranged above the mold base and sliding along a base, and a stripping roller or the like running around the fleece perpendicular to the conveying direction for chips, fibers or the like scattered on the metering conveyor belt, the gap width between the metering conveyor belt and Stripping roller seen over its length, is different, proposed in which the metering conveyor belt below the stripping roller is infinitely variable and its height can be adjusted in the transverse direction.
  • the aim of this device is to influence the amount of chips emerging between the stripping roller and the metering conveyor belt, which is then scattered, with regard to the basis weight distribution.
  • a device according to DE-PS 2214 900 for compensating for different grammages in the transverse direction of chip or fiber fleeces or the like for the production of chipboard, fiberboard or the like proves not to be applicable here, since the lifting of the floor belt only acts on one near the floor belt local compaction of the chip material without changing the discharge.
  • the present invention is accordingly based on the object of proposing a method and a device for carrying out this varing method with which the above-mentioned problem can be solved.
  • this object is achieved in that the amount of at least one partial flow is reduced at least at one point along its width from a stray current consisting of several partial flows.
  • variable subsets be withdrawn across its width at a number of points when at least one substream is reduced.
  • the removal of variable partial quantities across the width of at least one partial stream shows that when the chip stream is built up from a plurality of partial streams arranged one above the other, the density distribution over the width can be influenced in accordance with a predetermined profile of the fleece.
  • a device with a chip bunker, a plurality of discharge rollers arranged one above the other, a floor conveyor, entry devices, a cover opposite the discharge rollers and a discharge opening extending over the width of the bunker is proposed, which is characterized in that several height and width-adjustable suction probes predetermined width are arranged relative to the discharge rollers, and that a collecting connection for the suction is provided outside the cover.
  • This device which can also have mechanical discharge devices, such as baffles or rollers, instead of the suction proboscis, achieves a non-reactive reduction in the amount of at least one partial flow.
  • the suction proboscis are arranged in the upper half of the cover opposite the discharge rollers.
  • the suction nozzle By arranging the suction nozzle in the upper half, the local influences caused by the further partial flows are compensated for in a particularly suitable manner.
  • a storage bunker 1 which in the exemplary embodiment is designed as a floor belt bunker
  • chip material 2 to be spread is fed to the bunker via an entry device 3.
  • the entry device 3 can be designed as a scraper belt in order to attach the chip material to be loaded in each case to the chip material 2 already stored in the bunker.
  • Discharge rollers 4 cause the chip material 2 to be scattered.
  • the entire chip material content of the storage hopper 1 is advanced against the rotating discharge rollers 4, and the discharge rollers 4, which are designed as spiked rollers, mill the entire outlet cross section of the amount of chip material contained in the bunker. Partial streams 7 are thus generated over the entire spreading width of the bunker, which combine to form a chip stream 8 which leaves the bunker via a discharge opening 9 which extends over its width.
  • the discharge rollers are arranged behind a cover 10 of the bunker.
  • a conveyor belt (not shown) can also be arranged as a forim belt, on which the stray current 8 is deposited as a chip fleece when the forming belt is moved.
  • suction probes 13 and 14 are provided, which have a certain predetermined suction surface.
  • a row of suction probes 13 is shown schematically in FIG. 1a, which are arranged positioned over the entire width of the bunker. Extracted chip material is fed via suction hoses 20 to a collecting line 22, from which the return transport, as shown in more detail in FIG. 1, takes place to the entrance to the bunker.
  • FIG. 1b shows the defective cross section of a chip fleece 30 when there is no suction.
  • the elevations 31, 32, 33 are eliminated by suction through the proboscis 13, so that a fleece with a flat surface is formed.
  • a predeterminable surface contour 34 as shown in FIG. 1c as an edge elevation of the fleece can also be achieved.
  • the suction proboscis 13 are locked in the position once taken over a holding structure 15. With joints .16 and 17 and brackets 18, 19 arranged thereon, it is possible to move and position the suction proboscis 13 and 14 along the holding structure 15 and also transversely thereto over the entire discharge cross-section which is covered by the discharge rollers 4 to be arrested at predetermined positions. All proboscis 13, 14 are preferably connected to suction hoses 20, 21, which are led through an opening in the cover 10 to a collecting line 22, from which, via a further line 23, the extracted chips are transported back to the storage bunker 1 by the shortest route.
  • the line 23 can consist of a pressure line, in which the conveyance is carried out with the aid of compressed air, and a screw conveyor can also be provided in connection with the guide surface.
  • suction proboscis 13, 14, which are connected to a vacuum-generating system, not shown
  • guide surfaces in a predetermined dimension, comparable to the suction surface of the suction proboscis can also be used, which are also displaceably arranged in a corresponding manner on the holding structure 15, and feed their partial quantities to a collecting vessel arranged on the cover, for example a screw conveyor, which is guided over the entire spreading width of the bunker.
  • This screw conveyor takes care of the removal of the partial quantities released by the individual adjustable and lockable guide surfaces.
  • the removal members such as the suction nozzle or guide surface, are arranged in the upper half of the area of the discharge rollers 4.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Bei einem Spänebunker, der bei der Herstellung von Span- und/oder Faserplatten zur Aufnahme des zu streuenden Materials vorgesehen ist, und der mehrere übereinander angeordnete Austragswalzen (4), ein Bodenband (5), Eintragsvorrichtungen (3) und eine Abdeckung (10), gegenüber den Austragswalzen (4) trägt, und bei dem über die Breite des Bunkers eine Austragsöffnung sich erstreckt, ist zur Beeinflussung der Dichteverteilung des zu streuenden Materials (2) die Möglichkeit geschaffen, aus einzelnen Teilströmen (7), die im Bereich der Austragsöffnung zu einem Gesamtstrom (8) zusammengefaßt werden, wohldosierte Materialmengen zu entnehmen.In the case of a chip bunker, which is provided in the manufacture of chipboard and / or fiberboard for receiving the material to be scattered, and which has a plurality of discharge rollers (4) arranged one above the other, a base belt (5), entry devices (3) and a cover (10) , opposite the discharge rollers (4), and in which a discharge opening extends over the width of the bunker, the possibility is created to influence the density distribution of the material to be scattered (2) from individual partial streams (7) in the area of the discharge opening can be combined to form a total flow (8), taking well-dosed quantities of material.

Description

Verfahren zur Beeinflussung der Dichteverteilung eines zu streuenden Spänevlieses und Vorrichtung hierzuProcess for influencing the density distribution of a chip fleece to be scattered and device therefor

Die Erfindung betrifft-ein Verfahren und eine Vorrichtung zur Beeinflussung der Dichteverteilung eines zu streuenden Spänevlieses über seine Streubreite.The invention relates to a method and a device for influencing the density distribution of a chip fleece to be scattered over its scattering width.

Das Problem der gleichförmigen Streuung ist seit langem bekannt, beispielsweise wird in der DE-PS 2214 900 eine Streuvorrichtung zum Ausgleich unterschiedlicher Flächengewichte in der Querrichtung von Späne- oder Faservliesen oder dsrgleichen, für die Herstellung von Spanplatten, Faserplatten oder dergleichen mit einer unterhalb der Streuvorrichtung und relativ zu dieser bewegbaren Formunterlage mit einem flexiblen über der Formunterlage angeordneten und über eine Unterlage entlanggleitenden Dosierförderband, und einer über diesem senkrecht zur Förderrichtung das Vlieses umlaufenden Rückstreifwalze oder dergleichen für auf das Dosierförderband aufgestreute Späne, Fasern oder dergleichen, wobei die Spaltbreite zwischen Dosierfördarband und Rückstreifwalze über ihre Länge gesehen, verschieden ist, in Vorschlag gebracht, bei der das Dosierförderband unterhalb der Rückstreifwalze stufenlos und in Querrichtung in seiner Höhe unterschiedlich verstellbar ist. Durch diese Vorrichtung wird angestrebt, die zwischen Rückstreifwalze und Dosierförderband austretende Spänemenge, die anschließend gestreut wird, im Hinblick auf die Flächengewichtsverteilung zu beeinflussen.The problem of uniform scattering has been known for a long time, for example in DE-PS 2214 900 a spreading device for compensating for different basis weights in the transverse direction of chip or fiber fleeces or the like, for the production of chipboard, fiberboard or the like with one below the spreading device and relative to this movable mold base with a flexible metering conveyor belt arranged above the mold base and sliding along a base, and a stripping roller or the like running around the fleece perpendicular to the conveying direction for chips, fibers or the like scattered on the metering conveyor belt, the gap width between the metering conveyor belt and Stripping roller seen over its length, is different, proposed in which the metering conveyor belt below the stripping roller is infinitely variable and its height can be adjusted in the transverse direction. The aim of this device is to influence the amount of chips emerging between the stripping roller and the metering conveyor belt, which is then scattered, with regard to the basis weight distribution.

Zufolge Steigerung in der Austragsleistung derartiger Dosierbunker, wird nunmehr der Austragsvorgang gemäß der in der DE-PS 1084 199 offenbarten Weise durchgeführt. Durch die übereinander angeordneten Stachelwalzen, wird das Spangut über dan gesamten Querschnitt des Spänevorrats abgefräst.As a result of the increase in the discharge rate of such dosing bunkers, the discharge process is now carried out in the manner disclosed in DE-PS 1084 199. Due to the stacked spiked rollers, the chips are milled over the entire cross-section of the chip supply.

Eine Einrichtung gemäß der DE-PS 2214 900 zum Ausgleich unterschiedlicher Flächengewichte in Querrichtung von Späne-oder Faservliesen oder dergleichen für die Herstellung von Spanplatten, Faserplatten oder dergleichen erweist sich jedoch hier nicht anwendbar, da das Anheben des Bodenbandes lediglich zu einer nur in Bodenbandnähe wirkenden örtlichen Verdichtung des Spangutes führt, ohne eine Austragsänderung herbeizuführen.However, a device according to DE-PS 2214 900 for compensating for different grammages in the transverse direction of chip or fiber fleeces or the like for the production of chipboard, fiberboard or the like proves not to be applicable here, since the lifting of the floor belt only acts on one near the floor belt local compaction of the chip material without changing the discharge.

Auch wenn heute Streumaschinen eingesetzt werden, bei denen der Austrag und das Streuen von Spanmaterial nicht mehr durch einen Schlitz zwischen Bunker und Rückstreifwalze und nachgeschalteter Abschlagswalze erfolgt, sondern über eine Kaskade von übereinander angeordneten Austragswalzen, die als Stachelwalzen ausgebildet sind, treten weiterhin systematische Fehler in dem gestreuten Vlies auf, die zu Dichtefehlern führen auch ist es nicht möglich dem gestreuten Vlies eine vorgegebene Dichteverteilung aufzuprägen.Even if spreading machines are used today in which the discharge and spreading of chip material no longer takes place through a slot between the bunker and the stripping roller and the downstream knock-off roller, but via a cascade of discharge rollers arranged one above the other, which are designed as spiked rollers, systematic errors continue to occur on the scattered fleece, which lead to density errors, it is also not possible to impress a predetermined density distribution on the scattered fleece.

Der vorliegenden Erfindung liegt demgemäß die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Durchführung dieses Varfahrens in Vorschlag zu bringen, mit dem das oben genannte Problem lösbar ist. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daB aus einem aus mehreren Teilströmen bestehenden Streustrom, die Menge mindestens eines Teilstroms an mindestens einer Stelle seiner Breite reduziert wird. Durch die Wegnahme von Streupartikeln aus einem Teilstrom, der sich mit mehreren anderen Teilströmen kaskadenförmig zu einem Gesamtstrom vereinigt, wird in aktiver Weise die Dichteverteilung über die Streubreite eines zu streuenden Spänevlieses beeinfluBt.The present invention is accordingly based on the object of proposing a method and a device for carrying out this varing method with which the above-mentioned problem can be solved. According to the invention, this object is achieved in that the amount of at least one partial flow is reduced at least at one point along its width from a stray current consisting of several partial flows. By removing scattering particles from a partial stream, which cascades with several other partial streams to form a total stream, the density distribution over the scattering width of a chip fleece to be scattered is actively influenced.

Als Ausgestaltung des erfinderischen Verfahrens wird vorgeschlagen, daß bei Reduzierung mindestens eines Teilstroms an mehreren Stellen über seine Breite variable Teilmengen entnommen werden. Durch die Entnahme variabler Teilmengen über die Breite mindestens eines Teilstroms ist ersichtlich, daß bei Aufbau des Spänestroms aus mehreren übereinander angeordneten Teilströmen die Dichteverteilung über die Breite entsprechend einem vorgegebenen Profil des Vlieses beainflusst werden kann.As an embodiment of the method according to the invention, it is proposed that variable subsets be withdrawn across its width at a number of points when at least one substream is reduced. The removal of variable partial quantities across the width of at least one partial stream shows that when the chip stream is built up from a plurality of partial streams arranged one above the other, the density distribution over the width can be influenced in accordance with a predetermined profile of the fleece.

Zur Durchführung des Verfahrens wird eine Vorrichtung mit einem Spänebunker, mehreren übereinander angeordneten Austragswalzen, einem Bodenband, Eintragsvorrichtungen, einer Abdeckung gegsnüber den Austragswalzen und einer über die Breite des Bunkers sich erstreckenden Austragsöffnung vorgeschlagen, die sich dadurch auszeichnet, daß mehrere höhen- und breitenverstellbare Absaugrüssel vorgegebener Breite gegenüber den Austragswalzen angeordnet sind,und daß außerhalb der Abdeckung ein Sammelanschluß für die Absaugung vorgesehen ist. Durch diese Vorrichtung, die auch anstelle der Saugrüssel mechanische Ableitvorrichtungen besitzen kann, wie Leitbleche oder Walzen, wird eine rückwirkungsfreie Reduzierung der Menge mindestens eines Teilstromes erreicht.To carry out the method, a device with a chip bunker, a plurality of discharge rollers arranged one above the other, a floor conveyor, entry devices, a cover opposite the discharge rollers and a discharge opening extending over the width of the bunker is proposed, which is characterized in that several height and width-adjustable suction probes predetermined width are arranged relative to the discharge rollers, and that a collecting connection for the suction is provided outside the cover. This device, which can also have mechanical discharge devices, such as baffles or rollers, instead of the suction proboscis, achieves a non-reactive reduction in the amount of at least one partial flow.

Als eine weitere Ausgestaltung des Erfindungsgegenstandes wird es angesehen, daß die Absaugrüssel in der oberen Hälfte der Abdeckung gegenüber den Austragswalzen angeordnet sind. Durch Anordnen der Absaugrüssel in der oberen Hälfte, werden die örtlich auftretenden Beeinflussungen durch die weiteren Teilströme in besonders geeigneter Weise ausgeglichen.As a further embodiment of the subject matter of the invention, it is considered that the suction proboscis are arranged in the upper half of the cover opposite the discharge rollers. By arranging the suction nozzle in the upper half, the local influences caused by the further partial flows are compensated for in a particularly suitable manner.

In noch weiterer Ausgestaltung des Erfindungsgegenstandes wird vorgeschlagen, daß in Abhängigkeit einer vorgegebenen Dichteverteilung über die Breite eines Spänevlieses die Absaugrüssel vor den Austragswalzen ausgewählt positioniert werden. Die Auswahl und Positionierung kann entsprechend der vom Hersteller gegebenen Vorhaben elektrisch, mechanisch, hydraulisch oder pneumatisch als Positionierungsbefehl an die einzelnen Saugrüssel gegeben werden.In yet another embodiment of the subject matter of the invention, it is proposed that, depending on a predetermined density distribution over the width of a chip fleece Suction nozzle can be positioned in front of the discharge rollers. The selection and positioning can be given electrically, mechanically, hydraulically or pneumatically as a positioning command to the individual proboscis according to the manufacturer's plans.

In der nachfolgenden Zeichnung wird die Erfindung näher erläutert.

  • Es zeigen: Figur 1-, einen Querschnitt durch eine erfindungsgsmäβe Anordnung.
  • Figur 1a, eine Saugrüsselanordnung an einer Austragswalze.
  • Figur 1b, 1c, entsprechende Vliesquerschnitte.
The invention is explained in more detail in the following drawing.
  • FIG. 1 shows a cross section through an arrangement according to the invention.
  • Figure 1a, a proboscis arrangement on a discharge roller.
  • Figure 1b, 1c, corresponding fleece cross-sections.

In einem Vorratsbunker 1, der im Ausführungsbeispiel als Bodenbandbunker ausgebildet ist, wird zu streuendes Spanmaterial 2 über eine Eintragsvorrichtung 3 dem Bunker zugeführt. Die Eintragsvorrichtung 3 kann als Kratzerband ausgebildet sein, um das jeweils einzutragende Spanmaterial an das bereits im Bunker eingelagerte Spanmaterial 2 anzulagern. Austragswalzen 4 bewirken ein Austragen von zu streuendem Spanmaterial 2. Durch Umlauf eines Bodenbandes 5 in Pfeilrichtung 6, wird der gesamte Spanmaterialinhalt des Vorratsbunkers 1 gegen die rotierenden Austragswalzen 4 vorgeschoben, und die Austragswalzen 4, die als Stachelwalzen ausgebildet sind, fräsen den gesamten Austrittsquerschnitt der im Bunker enthaltenen Spanmaterialmenge ab. Damit werden Teilströme 7 über die gesamte Streubreite des Bunkers erzeugt, die zu einem Spänestrom 8 sich vereinigen, der den Bunker über eine über seine Breite sich erstreckende Austragsöffnung 9 verläβt. Die Austragswalzen sind hinter einer Abdeckung 10 des Bunkers angeordnet.In a storage bunker 1, which in the exemplary embodiment is designed as a floor belt bunker, chip material 2 to be spread is fed to the bunker via an entry device 3. The entry device 3 can be designed as a scraper belt in order to attach the chip material to be loaded in each case to the chip material 2 already stored in the bunker. Discharge rollers 4 cause the chip material 2 to be scattered. By rotating a floor conveyor 5 in the direction of the arrow 6, the entire chip material content of the storage hopper 1 is advanced against the rotating discharge rollers 4, and the discharge rollers 4, which are designed as spiked rollers, mill the entire outlet cross section of the amount of chip material contained in the bunker. Partial streams 7 are thus generated over the entire spreading width of the bunker, which combine to form a chip stream 8 which leaves the bunker via a discharge opening 9 which extends over its width. The discharge rollers are arranged behind a cover 10 of the bunker.

Der Spänestreustrom 8, wird nach seinem Austritt aus der Austragsöffnung 9 einem Streukopf 11 zugeführt, der beispielsweise die Aufteilung des Spänsstreustroms auf mehrere Streustellen bewirkt. Es kann jedoch auch bereits anstelle des Streukopfes 11 ein nicht dargestelltes Förderband als Forimband angeordnet sein, auf dem der Streustrom 8 bei Bewegung des Formbandes als Spänevlies abgelegt wird.The chip leakage stream 8, after it emerges from the discharge opening 9, is fed to a spreading head 11 which, for example, causes the chip leakage stream to be divided into several scattering points. However, instead of the spreading head 11, a conveyor belt (not shown) can also be arranged as a forim belt, on which the stray current 8 is deposited as a chip fleece when the forming belt is moved.

Zwischen Abdeckung 10 und Austragswalzen 4, sind Reihen von Saugrüsseln 13 bzw. 14 vorgesehen, die eine bestimmte vorgegebene Saugfläche besitzen. In Figur 1a ist schematisch eine Reihe von Saugrüsseln 13 dargestellt, die positioniert über die- gesamte Breite des Bunkers angeordnet sind. Ober Saugschläuche 20, wird abgesaugtes Spanmaterial einer Sammelleitung 22 zugeführt, von der aus der Rücktransport,wie in Figur 1 näher dargestellt,zum Bunkereintritt erfolgt.Between cover 10 and discharge rollers 4, rows of suction probes 13 and 14 are provided, which have a certain predetermined suction surface. A row of suction probes 13 is shown schematically in FIG. 1a, which are arranged positioned over the entire width of the bunker. Extracted chip material is fed via suction hoses 20 to a collecting line 22, from which the return transport, as shown in more detail in FIG. 1, takes place to the entrance to the bunker.

Figur 1b stellt den fehlerhaften Querschnitt eines Spänevlieses 30 dar, wenn keine Absaugung erfolgt. Durch die Absaugung über die Saugrüssel 13 werden die Erhöhungen 31,32,33 beseitigt, so daB ein Vlies mit ebener Oberfläche entsteht. Durch erhöhte Abnahme von Spanmaterial über die Saugrüssel 13, ist auch eine vorgebbare Oberflächenkontur 34 wie in Figur 1c als Randüberhöhung des Vlieses dargestellt, erreichbar.FIG. 1b shows the defective cross section of a chip fleece 30 when there is no suction. The elevations 31, 32, 33 are eliminated by suction through the proboscis 13, so that a fleece with a flat surface is formed. By increasing the removal of chip material via the suction proboscis 13, a predeterminable surface contour 34 as shown in FIG. 1c as an edge elevation of the fleece can also be achieved.

Die Saugrüssel 13 werden über eine Haltekonstruktion 15 in der einmal eingenommenen Lage arretiert. Durch Gelenke .16 bzw. 17 und daran angeordneten Halterungen 18,19 ist es möglich, die Saugrüssel 13 bzw. 14 entlang der Haltekonstruktion 15 und auch quer zu dieser über den gesamten Austragsquerschnitt, der von den Austragswalzen 4 abgedeckt wird, positioniert zu verschieben und an vorgegebenen Stellen arretiert anzuordnen. Alle Saugrüssel 13, 14 sind vorzugsweise mit Saugschläuchen 20,21 verbunden, die durch eine Öffnung in der Abdeckung 10 zu einer Sammelleitung 22 geführt sind, von der aus über eine weitere Leitung 23 ein Rücktransport der abgesaugten Spänemengen in den Vorratsbunker 1 auf dem kürzesten Wege durchgeführt wird. Die Leitung 23 kann aus einer Druckleitung .bestehen, in der mit Hilfe von Druckluft die Förderung durchgeführt wird, es kann auch in Verbindung mit Leitflächan ein Schneckenförderer vorgesehen sein.The suction proboscis 13 are locked in the position once taken over a holding structure 15. With joints .16 and 17 and brackets 18, 19 arranged thereon, it is possible to move and position the suction proboscis 13 and 14 along the holding structure 15 and also transversely thereto over the entire discharge cross-section which is covered by the discharge rollers 4 to be arrested at predetermined positions. All proboscis 13, 14 are preferably connected to suction hoses 20, 21, which are led through an opening in the cover 10 to a collecting line 22, from which, via a further line 23, the extracted chips are transported back to the storage bunker 1 by the shortest route. The line 23 can consist of a pressure line, in which the conveyance is carried out with the aid of compressed air, and a screw conveyor can also be provided in connection with the guide surface.

An Stelle der Saugrüssel 13,14, die an ein nicht dargestelltes Unterdruck erzeugendes System angeschlossen sind, können auch Leitflächen in vorgegebener Abmessung, vergleichbar der Saugfläche der Saugrüssel, verwendet werden, die in entsprechender Weise ebenfalls verschiebbar an der Haltekonstruktion 15 angeordnet sind, und die ihre Teilmengen einem an der Abdeckung angeordneten Sammelgefäß zuführen, beispielsweise einem Schneckenförderer, der über die gesamte Streubreite des Bunkers geführt ist. Dieser Schneckenförderer übernimmt den Abtransport der von den einzelnen verstell- und arretierbaren Leitflächen abgegebenen Teilmengen.Instead of the suction proboscis 13, 14, which are connected to a vacuum-generating system, not shown, guide surfaces in a predetermined dimension, comparable to the suction surface of the suction proboscis, can also be used, which are also displaceably arranged in a corresponding manner on the holding structure 15, and feed their partial quantities to a collecting vessel arranged on the cover, for example a screw conveyor, which is guided over the entire spreading width of the bunker. This screw conveyor takes care of the removal of the partial quantities released by the individual adjustable and lockable guide surfaces.

Wie in Figur 1 dargestellt ist, ist es besonders im Hinblick auf die vergleichmäβigung besonders zweckmäßig, wenn die Abnahmeorgane, wie Saugrüssel oder Leitfläche, in der oberen Hälfte das Bereichs der Austragswalzen 4 angeordnet sind.As shown in FIG. 1, it is particularly expedient, particularly with regard to the uniformity, if the removal members, such as the suction nozzle or guide surface, are arranged in the upper half of the area of the discharge rollers 4.

Claims (5)

1. Verfahren zur Beeinflussung der Dichteverteilung eines zu streuenden Spänevlieses über seine Streubreite, dadurch gekennzeichnet, daß aus einem aus mehreren Teilströmen (7) bestehenden Spänestrom (8) die Menge mindestens eines Teilstroms (7) an mindestens einer Stelle seiner Breite reduziert wird.1. A method for influencing the density distribution of a chip fleece to be scattered over its scatter width, characterized in that the amount of at least one partial stream (7) is reduced at least at one point along its width from a chip stream (8) consisting of several partial streams (7). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß bei Reduzierung mindestens eines Teilstromes (7) an mehreren Stellen über seine Breite variable Teilmengen entnommen werden.2. The method according to claim 1, characterized in that when reducing at least one partial stream (7) variable subsets are taken at several points across its width. 3. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 und/oder 2 mit einem Spänebunker (1), mehreren übereinander angeordneten Austragswalzen (4), einem Bodenband (5), Eintragsvorrichtungen (3), einer Abdeckung (10) gegenüber den Austragswalzen (4) und einer über die Breite des Bunkers sich erstreckenden Austragsöffnung (9), dadurch gekennzeichnet, daß mehrere höhen- und seitsnverstellbare Absaugrüssel (13,14) vorgegebener Breite gegenüber den Austragswalzen (4) angeordnet sind,und daß außerhalb der Abdeckung (10) ein Sammelanschluß (22) für die Absaugung vorgesehen ist.3. Device for carrying out the method according to claims 1 and / or 2 with a chip bunker (1), a plurality of discharge rollers (4) arranged one above the other, a bottom belt (5), entry devices (3), a cover (10) opposite the discharge rollers ( 4) and a discharge opening (9) extending over the width of the bunker, characterized in that a plurality of height and side-adjustable suction probes (13, 14) of a predetermined width are arranged opposite the discharge rollers (4), and that outside the cover (10) a collective connection (22) is provided for the suction. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Absaugrüssel (13,14) in der oberen Hälfte der Abdeckung (10) gegenüber den Austragswalzen (4) angeordnet sind.4. The device according to claim 3, characterized in that the suction nozzle (13, 14) are arranged in the upper half of the cover (10) opposite the discharge rollers (4). 5. Vorrichtung zur Positionierung der Absaugrüssel nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in Abhängigkeit einer vorgegebenen Dichteverteilung über die Breite eines Vlieses (31) die Absaugrüssel (13,14) vor den Austragswalzen (4) ausgewählt positioniert werden.5. Device for positioning the suction nozzle according to one or more of the preceding claims, characterized in that, depending on a predetermined density distribution across the width of a fleece (31), the suction nozzle (13, 14) are positioned in front of the discharge rollers (4).
EP81105215A 1981-07-04 1981-07-04 Method and apparatus for controlling the density distribution of a dispersed particle mat Expired EP0069162B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8181105215T DE3170270D1 (en) 1981-07-04 1981-07-04 Method and apparatus for controlling the density distribution of a dispersed particle mat
EP81105215A EP0069162B1 (en) 1981-07-04 1981-07-04 Method and apparatus for controlling the density distribution of a dispersed particle mat
FI820641A FI73912C (en) 1981-07-04 1982-02-25 Method and apparatus for affecting the spreading density of a spreadable chip layer
US06/392,334 US4504182A (en) 1981-07-04 1982-06-28 Procedure for controlling the density distribution of wood chips and device therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81105215A EP0069162B1 (en) 1981-07-04 1981-07-04 Method and apparatus for controlling the density distribution of a dispersed particle mat

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EP0069162A1 true EP0069162A1 (en) 1983-01-12
EP0069162B1 EP0069162B1 (en) 1985-05-02

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US (1) US4504182A (en)
EP (1) EP0069162B1 (en)
DE (1) DE3170270D1 (en)
FI (1) FI73912C (en)

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EP0161323A1 (en) * 1984-04-16 1985-11-21 Bison-Werke Bähre & Greten GmbH & Co. KG Method of and apparatus for obtaining a predetermined weight per unit area in a fibre layer
EP0162118A1 (en) * 1984-04-16 1985-11-27 Bison-Werke Bähre & Greten GmbH & Co. KG Method of and apparatus for obtaining a predetermined weight per unit area in a first fibre layer
US4636159A (en) * 1984-04-16 1987-01-13 Bison-Werke Bahre & Greten Gmbh & Co. Kg Apparatus for obtaining a predeterminable distribution of weight in the transverse direction of a pre-mat and/or mat
EP0292581A1 (en) * 1987-05-23 1988-11-30 Carl Schenck Ag Fibre felt strewing method
EP0230483B1 (en) * 1986-01-20 1990-03-28 Carl Schenck Ag Process for uniforming spread particles and device for performing the process
EP0507731A1 (en) * 1991-03-26 1992-10-07 Matec Holding Ag Method and apparatus for manufacturing a fibrous moulded article
DE202018102823U1 (en) 2018-05-22 2019-08-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Device for scattering a fleece on a forming belt
EP3572197A1 (en) 2018-05-22 2019-11-27 Dieffenbacher Gmbh Maschinen- Und Anlagenbau Device and method for dispersing a fleece on a forming web

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US4838750A (en) * 1985-09-13 1989-06-13 Henley Burrowes & Company Limited Storage bunker
US5176295A (en) * 1990-03-13 1993-01-05 Beloit Technologies, Inc. Discharge apparatus for bins
DE102006030122B4 (en) * 2006-06-28 2008-05-21 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg The scattering material plant
CN103753686B (en) * 2013-12-24 2015-12-09 上海人造板机器厂有限公司 A kind of throwing roller arrangement with the spreading machine of adjustable damper
CN110127325B (en) * 2019-04-15 2020-12-01 洪湖市金叶烟草机械有限公司 Storage cabinet discharging speed control method and system

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DE1093076B (en) * 1958-02-03 1960-11-17 Max Himmelheber Dipl Ing Schuett-, dosing and distribution device for wood chips or the like.
US3252186A (en) * 1963-01-21 1966-05-24 Wood Conversion Co Differential fiber dispersing rolls and felting therefrom
DE1728468A1 (en) * 1965-04-15 1972-12-28 Werz Furnier Sperrholz Scattering device for glued lignocellulosic particles
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161323A1 (en) * 1984-04-16 1985-11-21 Bison-Werke Bähre & Greten GmbH & Co. KG Method of and apparatus for obtaining a predetermined weight per unit area in a fibre layer
EP0162118A1 (en) * 1984-04-16 1985-11-27 Bison-Werke Bähre & Greten GmbH & Co. KG Method of and apparatus for obtaining a predetermined weight per unit area in a first fibre layer
US4636159A (en) * 1984-04-16 1987-01-13 Bison-Werke Bahre & Greten Gmbh & Co. Kg Apparatus for obtaining a predeterminable distribution of weight in the transverse direction of a pre-mat and/or mat
EP0230483B1 (en) * 1986-01-20 1990-03-28 Carl Schenck Ag Process for uniforming spread particles and device for performing the process
EP0292581A1 (en) * 1987-05-23 1988-11-30 Carl Schenck Ag Fibre felt strewing method
US4931243A (en) * 1987-05-23 1990-06-05 Carl Schenck Ag Process and apparatus for spreading a chip web
EP0507731A1 (en) * 1991-03-26 1992-10-07 Matec Holding Ag Method and apparatus for manufacturing a fibrous moulded article
DE202018102823U1 (en) 2018-05-22 2019-08-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Device for scattering a fleece on a forming belt
EP3572197A1 (en) 2018-05-22 2019-11-27 Dieffenbacher Gmbh Maschinen- Und Anlagenbau Device and method for dispersing a fleece on a forming web

Also Published As

Publication number Publication date
FI73912C (en) 1987-12-10
EP0069162B1 (en) 1985-05-02
DE3170270D1 (en) 1985-06-05
FI73912B (en) 1987-08-31
US4504182A (en) 1985-03-12

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