EP0292581B1 - Méthode pour répandre une nappe de copeaux - Google Patents

Méthode pour répandre une nappe de copeaux Download PDF

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Publication number
EP0292581B1
EP0292581B1 EP87107526A EP87107526A EP0292581B1 EP 0292581 B1 EP0292581 B1 EP 0292581B1 EP 87107526 A EP87107526 A EP 87107526A EP 87107526 A EP87107526 A EP 87107526A EP 0292581 B1 EP0292581 B1 EP 0292581B1
Authority
EP
European Patent Office
Prior art keywords
mat
width
supply
felt
rakes
Prior art date
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.)
Expired - Lifetime
Application number
EP87107526A
Other languages
German (de)
English (en)
Other versions
EP0292581A1 (fr
Inventor
Walter Henschel
Manfred Riesner
Uwe Dr. Kunstmann
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.)
Carl Schenck AG
Original Assignee
Carl Schenck AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Schenck AG filed Critical Carl Schenck AG
Priority to AT87107526T priority Critical patent/ATE58325T1/de
Priority to DE8787107526T priority patent/DE3766247D1/de
Priority to EP87107526A priority patent/EP0292581B1/fr
Priority to US07/191,041 priority patent/US4931243A/en
Priority to CA000566410A priority patent/CA1300552C/fr
Priority to FI882166A priority patent/FI85959C/fi
Publication of EP0292581A1 publication Critical patent/EP0292581A1/fr
Application granted granted Critical
Publication of EP0292581B1 publication Critical patent/EP0292581B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • 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 content of the invention is a method for controlling a transverse distribution for a chip fleece in which, based on a chip supply, a chip-air mixture is formed as a stream of chips, which is deposited in the width of the fleece on a base which is moved past under the chip supply.
  • the European patent application EP-A 69 162 has disclosed a method for influencing the density distribution of a chip fleece to be scattered and a device for this purpose, which is characterized in that at least one partial stream over a part of its width corresponds to a predetermined density distribution Partial quantity is removed.
  • Partial quantity is removed.
  • European patent 0 109 456 has disclosed a method and a device for equalizing the density distribution in a synthetic wood panel, in which, depending on the weight distribution of the bulk material discharged from a supply measured over a discharge cross-section, a separation command for those present in the corresponding partial cross-sections is issued by one predetermined target density distribution deviating weight quantity of the bulk material is formed for their separation.
  • a separation command for those present in the corresponding partial cross-sections is issued by one predetermined target density distribution deviating weight quantity of the bulk material is formed for their separation.
  • EP-A 230 483 discloses a method for controlling a transverse distribution for a chip fleece, which is based on a chip flow which is formed in Fleece width is deposited on a mat that is moved past under the chip supply, in which the chip flow is divided into two partial streams, the direction of flow of the other partial stream runs in the opposite direction, and in which the K partial stream is located at a plurality of removal points distributed over the fleece width, which are in one area are arranged laterally and at the lower end of a strand of transfer rollers, partial quantities can be removed in accordance with a uniform or predetermined fleece height distribution over the fleece width.
  • the present invention is also based on the object of eliminating errors which are caused by discharge elements in the transverse distribution of the chip fleece and of carrying out a control and control of the transverse distribution.
  • the solution to the object according to the present application differs by the following procedural features: the chip flow is initially divided into two partial flows, in which each partial flow is subsequently made up of bars arranged in a cascade-shaped manner and obliquely to the vertical plane running transversely to the fleece direction existing rakes are divided into further partial streams that mix again, and partial quantities are taken from a further partial stream at the lower end of a cascade.
  • the errors caused by the removal devices are eliminated by dividing the spreading material removed from the supply over the entire spreading width and by changing the direction of the individual particles. There is a quasi-uniform alignment of chip particles that fall unevenly into a cascade. This allows correct removal from the uniform chip veil to be carried out via the predetermined fleece distribution curve when the fleece is deposited.
  • German published patent application 2 942 163 discloses a method and a device for dividing a conveying flow, which is characterized in that the conveying flow is continuously fed to a flow divider and the continuous partial flows along the flow divider and several are continuously conveyed through the flow divider.
  • chip quantities supplied to this current divider are exactly divided, but this also means that the distribution errors present in the spreading material are passed on via a distribution chute.
  • the object on which the invention is based is achieved on the basis of the state of the art which has become so well known by the characterizing features of claim 2.
  • a receiving device provided with closable openings is provided in the area of the last cascade; a beam of light emitted by a light source strikes the chip fleece across its width across the direction of progress; a video camera records this light beam and passes this information on to a computer in which control information for the recording device is provided be tested.
  • Such a device produces a chip fleece that is completely uniform across the width on a base. It is assumed here that the bulk density is constant when using uniform material with the same bed height. If a predetermined bulk height, which is comparable to a predetermined bulk density, is to be generated and controlled, this is also achieved by the characterizing features of claim 2.
  • a conveyor device is provided in the receiving device. This makes it possible, according to the invention, on the one hand, to transport back the partial quantity present in the receiving device or, according to the invention, to distribute it evenly over the spreading width and by arranging a weir which extends over the entire width of the fleece, a uniform application of a fleece layer either below the fleece to be built up or onto it put on the fleece.
  • At least one spreader roller is additionally provided under the last cascade. This ensures that the chips are easily separated in the transition area to the cover layers. In addition, braking and flattening of the chips is supported at the same time.
  • the receiving device has closable openings separated by webs, which can be displaced with respect to one another transversely to the nonwoven direction with the rake interacting with them.
  • the webs of the receiving device are designed as rakes.
  • a particularly advantageous embodiment consists in that two rakes provided one above the other and above the receiving device can be displaced relative to one another transversely to the fleece direction. This arrangement allows the opening width into the receiving device to be regulated in the simplest form, which inevitably leads to a regulation of the receiving amount.
  • a device is proposed according to the invention in which the light lines recorded over a length of the fleece are stored in the computer over the width of the fleece and then the surface of the plate is displayed in a color grid assigned to the height layers on a monitor.
  • the nonwoven surface changes, it is proposed that not one but several light lines are emitted over the entire width of the nonwoven. This ensures that changes in fleece height can also be recorded by the same camera when the video camera is stationary.
  • FIG. 1 bulk material 2 to be scattered from a chip supply (not shown) via a rake-like dividing device I for the production of chipboard, waverboard and OSB boards is fed via a distribution chute 3 to the rake pairs 5, 6, 7 located in a housing 4.
  • the rake pairs each consist of rods of the same length that extend over the width of the fleece and are spaced from one another and are preferably attached to cross rods 8 with one end each.
  • the cross bars 8 also extend over the entire width of the housing 4, which is adapted to the fleece width.
  • the number shown in FIG. 1 and the inclination of the rakes represent only one exemplary embodiment.
  • the computing pair 5 forms the first cascade
  • the computing pairs 6 and 7 form the second cascade.
  • the inclination of the pairs of rakes to one another is initiated via the cross bars 8 from outside the housing 4.
  • two spreader rollers 9 are arranged below the last cascade. These are used to change and brake the evenly distributed material in its direction of fall and / or to achieve a simple separation of the chip material if a chipboard or an OSB board is produced from several chip layers and the present device, for example for the production of the Middle class is used.
  • such dissolving devices as described in FIG. I can be arranged one behind the other, the first and third housings, for example in the production of three-layer boards, having no spreader rollers 9, while the second housing is on its outlet has 10 spreader rollers 9.
  • a pick-up device 11 is also provided on a rake of the pair of rakes 7, by means of which too much scattered material is picked up.
  • the function of this receiving device is explained in more detail in connection with FIG. 2.
  • the arrangement of the receiving device according to FIG. I in front of the rake which is the most downstream in the direction of the fleece which is built up on a base only sets
  • the receiving device II can also be located behind the rake which is the most upstream in the direction of the fleece which is built up on a base (fleece direction), in this case the left rake of the pair of rakes 8.
  • a fleece holding device 12 is shown below the housing 4, which extends over the entire spreading width.
  • the fleece receiving device 12 can be a conveyor belt that extends over the width of the chip fleece or overlapping flexible or rigid underlays or a combination of such fleece carriers.
  • the fleece receiving device 12 moves in the direction of an arrow 13, so that the final fleece height 14 for the fleece formed under this housing is reached at the left end of the housing 4.
  • the course of the fleece height over the width of a scattered fleece is represented by a first monitor 21 connected to the computer 18, and the height layers are shown on a second monitor 22 in a grid over the length of a finished chipboard.
  • nonwoven surfaces can be recorded with a fixed video camera which differ significantly in height without the scattering accuracy being reduced thereby .
  • the bulk material 2 falling into the housing 4 according to FIG. 2 via a rake-like dividing device I is divided up via the distribution chute 3.
  • the errors of the part of the non-redirected bulk material 2 will remain until the end of the distribution chute. If a partial stream 25 thus provided with errors strikes the computing pair 5, this is resolved into a further partial stream 26 and the previous partial stream 25 by the right computing unit of the computing pair 5.
  • the further partial stream 26 divides again on the left rake of the computing pair 7, so that any irregularities present on the distribution chute 3 are thereby compensated.
  • the partial flow 25, which could still have distribution errors from the distribution chute 3, will come into the area of the receiving device II, which also extends over the entire later fleece width.
  • the partial stream 25 is also divided here.
  • the distribution error arriving via the distribution chute 3 has already become so small that this error can be regarded as practically balanced .
  • higher accuracy it is possible at any time to add further cascade levels depending on the required accuracy.
  • openings 27 of the receiving device are opened more or less according to a double arrow 28, so that the excess quantity of bulk material discharged from the supply (not shown) can flow into the receiving device II.
  • a distribution screw 29 is provided in the receiving device II, through which the incoming material can be transported away. Instead of returning the excess bulk material to the supply, a conveyor device (99), which is moved back and forth perpendicularly to the image plane, can serve, as shown in more detail in FIG. 3, to even out excess bulk material 30 within the receiving device. If the receiving device II has an overflow edge 31 in its lower part, the overpoured material 30 will thereby emerge and, depending on the arrangement of the receiving device, be placed downstream or upstream in the area of the last cascade as a nonwoven underlay or as a nonwoven underlay.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Dental Preparations (AREA)
  • Pens And Brushes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Control Of Conveyors (AREA)
  • Nonwoven Fabrics (AREA)
  • Collation Of Sheets And Webs (AREA)

Claims (9)

1. Procédé de commande d'une distribution transversale d'une nappe de copeaux dans lequel on forme, à partir d'une réserve de copeaux, un mélange de copeaux et d'air sous la forme d'un courant de copeaux qui est déposé, dans la largeur de la nappe, sur un support se déplacant sous la réserve de copeaux,
dans lequel le courant de copeaux est tout d'abord partagé en deux courants partiels, un courant partiel s'écoulant dans le sens de déplacement du support et l'autre courant partiel dans le sens opposé,
dans lequel chaque courant partiel est ensuite partagé, au moyen de grilles constituées de barreaux, disposées en cascade et obliquement par rapport au plan vertical perpendiculaire à la direction de la nappe, en d'autres courants partiels se mélangeant à nouveau et
dans lequel on peut prélever, d'un autre courant partiel, en un grand nombre de points de prélèvement répartis sur la largeur de la nappe et qui sont placés dans une région, à côté et à l'extrémité inférieure d'une cascade, des quantités partielles, suivant une distribution en hauteur de la nappe, uniforme ou donnée sur la largeur de celle-ci.
2. Dispositif de commande d'une nappe de copeaux (16) à partir d'une réserve, sur une largeur correspondant à la largeur de la nappe, sur un support (12) se déplaçant sous la réserve, selon une distribution en hauteur de la nappe (14), imposée dans la nappe, perpendiculairement à la direction de la nappe, avec un dispositif de subdivision (1) en râteau, placé entre la réserve est le support de nappe (2) et avec un distributeur (3), caractérisé en ce qu'on place, au-dessous et derrière le distributeur (3), au moins une paire de râteaux (5) ne s'interpénétrant pas, inclinés l'un par rapport à l'autre, en ce qu'en aval et au-dessous de chaque râteau de la paire de rateaux (5), on ce une autre paire de rateaux (6, 7) inclinés l'un par port à l'autre, ne s'interpénétrant pas, pour former la cade suivante, en ce que dans la région de l'extrémité la dernière cascade, on prévoit, derrière ou devant le râteau situé le plus loin en amont ou en aval, dans le sens la nappe se constituant sur un support (sens de la nappe), un dispositif de réception (11) enfermé dans une enveloppe, s'étendant sur la largeur de dispersion et pourvu d'ouvertures pouvant être fermées, et en ce qu'un rayon lumineux (15), partant d'une source de lumière (23), balaye la nappe de copeaux (16), sur sa largeur, perpendiculairement à la direction d'avance (13), en ce qu'une caméra vidéo (17) filme cette raie de lumière et transmet cette information à un calculateur (18) qui élabore des informations de commande (19) pour le dispositif de réception (11).
3. Dispositif selon la revendication 2, caractérisé en ce qu'on prévoit, dans la région de l'extrémité de la dernière cascade, derrière ou devant le râteau situé le plus loin en amont ou en aval, dans le sens de la nappe se constituant sur un support (sens de la nappe), un dispositif de réception (11) enfermé dans une enveloppe, s'étendant sur la largeur de dispersion, pourvu d'ouvertures pouvant être fermées.
4. Dispositif selon la revendication 2, caractérisé en ce qu'on prévoit dans le dispositif de réception (11), un dispositif de transport (29).
5. Dispositif selon la revendication 2, caractérisé en ce qu'on prévoit au moins un cylindre de dispersion (9), sous la dernière cascade.
6. Dispositif selon l'une des revendications ci-dessus, caractérisé en ce que le dispositif de réception (11) est pourvu d'ouvertures pouvant être fermées, séparées l'une de l'autre par des traverses et en ce que celles-ci peuvent coulisser l'une par rapport à l'autre, perpendiculairement à la direction de la nappe, avec le râteau coopérant avec ce dispositif.
7. Dispositif selon la revendication 5, caractérisé en ce que les traverses forment des râteaux.
8. Dispositif selon la revendication 2 ou 3, caractérisé ce en que deux râteaux superposés et prévus au-dessus du dispositif de réception (11), peuvent coulisser l'un par rapport à l'autre, perpendiculairement à la direction de la nappe.
9. Dispositif selon une quelconque des revendications ci-dessus, caractérisé en ce que les raies de lumière sur la largeur de la nappe, filmées sur une longueur de nappe correspondant à la longueur d'une plaque, sont mémorisées dans le calculateur (18) et en ce qu'ensuite la surface de la plaque est représentée en couches de hauteur, sur un moniteur (21 ou 22).
EP87107526A 1987-05-23 1987-05-23 Méthode pour répandre une nappe de copeaux Expired - Lifetime EP0292581B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT87107526T ATE58325T1 (de) 1987-05-23 1987-05-23 Verfahren zum streuen eines spaenevlieses.
DE8787107526T DE3766247D1 (de) 1987-05-23 1987-05-23 Verfahren zum streuen eines spaenevlieses.
EP87107526A EP0292581B1 (fr) 1987-05-23 1987-05-23 Méthode pour répandre une nappe de copeaux
US07/191,041 US4931243A (en) 1987-05-23 1988-05-06 Process and apparatus for spreading a chip web
CA000566410A CA1300552C (fr) 1987-05-23 1988-05-10 Procede de dechargement de copeaux sur une bande continue et appareil connexe
FI882166A FI85959C (fi) 1987-05-23 1988-05-10 Foerfarande foer att utstroe en spaonmatta.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87107526A EP0292581B1 (fr) 1987-05-23 1987-05-23 Méthode pour répandre une nappe de copeaux

Publications (2)

Publication Number Publication Date
EP0292581A1 EP0292581A1 (fr) 1988-11-30
EP0292581B1 true EP0292581B1 (fr) 1990-11-14

Family

ID=8197020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107526A Expired - Lifetime EP0292581B1 (fr) 1987-05-23 1987-05-23 Méthode pour répandre une nappe de copeaux

Country Status (6)

Country Link
US (1) US4931243A (fr)
EP (1) EP0292581B1 (fr)
AT (1) ATE58325T1 (fr)
CA (1) CA1300552C (fr)
DE (1) DE3766247D1 (fr)
FI (1) FI85959C (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2005035214A1 (fr) * 2003-09-17 2005-04-21 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Reservoir a materiau d'epandage comprenant un dispositif de deversement pour epandre le materiau d'epandage
DE102018112166A1 (de) * 2018-05-22 2019-11-28 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung und Verfahren zur Streuung eines Vlieses auf einem Formband

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CH681990A5 (fr) * 1989-04-14 1993-06-30 Matec Holding
DE4117252A1 (de) * 1991-05-27 1992-12-03 Winkler Duennebier Kg Masch Vorrichtung zum aufloesen von flockenverklumpungen
AU7980894A (en) * 1993-10-19 1995-05-08 Procter & Gamble Company, The Method and apparatus for forming an intermittent stream of particles for application to a fibrous web
EP0800901B1 (fr) * 1996-04-10 2003-07-02 Dieffenbacher Schenck Panel GmbH Procédé et appareil pour fabriquer un mat
DE19916447A1 (de) 1999-04-12 2000-10-19 Dieffenbacher Schenck Panel Formstation
ES2202188T3 (es) * 1999-11-17 2004-04-01 Alexanderwerk Aktiengesellschaft Instalacion de compactado para productos a granel.
DE10101380B4 (de) * 2001-01-13 2008-12-24 Dieffenbacher Gmbh + Co. Kg Sichterbeschickungungsstrecke bei Anlagen zur Herstellung von Holzfaserplatten
DE10224497A1 (de) * 2002-05-31 2003-12-11 Dieffenbacher Gmbh Maschf Vorrichtung zur Längsorientierung von länglichen Holzspänen
DE10230606B4 (de) 2002-07-08 2016-09-08 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Längsorientierung von länglichen Holzspänen
DE102005062953B4 (de) * 2005-12-29 2008-07-03 Glunz Ag Verfahren und Vorrichtung zur Herstellung von Formkörpern, insbesondere Platten, aus Lignocellulose haltigen Fasern mit Faseranalyse
DE102006047002A1 (de) * 2006-10-02 2008-04-03 Dieffenbacher Gmbh + Co. Kg Verfahren, Vorrichtung und Anlage zum Feststellen und Ausscheiden von Unregelmäßigkeiten aus einem bewegten Materialstrom im Zuge der Herstellung von Werkstoffplatten
DE102010001650A1 (de) * 2010-02-05 2011-08-11 Dieffenbacher GmbH + Co. KG, 75031 Verfahren und Anlage zur Herstellung einer Streugutmatte aus zumindest einer gestreuten Schicht und eine Streugutmatte zur Verpressung in einer Presse im Zuge der Herstellung von Holzwerkstoffplatten (S)
DE102010001649A1 (de) * 2010-02-05 2011-08-11 Dieffenbacher GmbH + Co. KG, 75031 Verfahren und Anlage zur Herstellung einer Streugutmatte aus zumindest einer gestreuten Schicht und eine Streugutmatte zur Verpressung in einer Presse im Zuge der Herstellung von Holzwerkstoffplatten (L)
CN104988663B (zh) * 2015-07-03 2017-10-03 苏州宝丽洁纳米材料科技股份有限公司 一种无纺布纤维流向监测装置
ES2756337T3 (es) * 2016-10-06 2020-04-27 SWISS KRONO Tec AG Equipo de prensa para placas de compuesto de madera y procedimiento para vigilar un equipo de prensa para placas de compuesto de madera
DE202018102823U1 (de) 2018-05-22 2019-08-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Streuung eines Vlieses auf einem Formband

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EP0109456B1 (fr) * 1982-11-20 1986-09-03 Carl Schenck Ag Procédé et dispositif pour égaliser la distribution de densité dans un panneau de bois artificiel
EP0230483B1 (fr) * 1986-01-20 1990-03-28 Carl Schenck Ag Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005035214A1 (fr) * 2003-09-17 2005-04-21 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Reservoir a materiau d'epandage comprenant un dispositif de deversement pour epandre le materiau d'epandage
DE102018112166A1 (de) * 2018-05-22 2019-11-28 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung und Verfahren zur Streuung eines Vlieses auf einem Formband

Also Published As

Publication number Publication date
DE3766247D1 (de) 1990-12-20
FI882166A (fi) 1988-11-24
EP0292581A1 (fr) 1988-11-30
FI85959B (fi) 1992-03-13
FI85959C (fi) 1992-06-25
ATE58325T1 (de) 1990-11-15
FI882166A0 (fi) 1988-05-10
CA1300552C (fr) 1992-05-12
US4931243A (en) 1990-06-05

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