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EP3572197B1 - Dispositif et procédé d'étalement d'un non tissé sur une bande de formage - Google Patents

Dispositif et procédé d'étalement d'un non tissé sur une bande de formage Download PDF

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Publication number
EP3572197B1
EP3572197B1 EP19175961.2A EP19175961A EP3572197B1 EP 3572197 B1 EP3572197 B1 EP 3572197B1 EP 19175961 A EP19175961 A EP 19175961A EP 3572197 B1 EP3572197 B1 EP 3572197B1
Authority
EP
European Patent Office
Prior art keywords
opening
cover plate
openings
forming belt
discharge device
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.)
Active
Application number
EP19175961.2A
Other languages
German (de)
English (en)
Other versions
EP3572197A1 (fr
Inventor
Klaus Plutowsky
Reinhard Schwinn
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.)
Dieffenbacher GmbH Maschinen und Anlagenbau
Original Assignee
Dieffenbacher GmbH Maschinen und Anlagenbau
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 Dieffenbacher GmbH Maschinen und Anlagenbau filed Critical Dieffenbacher GmbH Maschinen und Anlagenbau
Publication of EP3572197A1 publication Critical patent/EP3572197A1/fr
Application granted granted Critical
Publication of EP3572197B1 publication Critical patent/EP3572197B1/fr
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B27N3/146—Controlling mat weight distribution

Definitions

  • the present invention relates to a device for spreading a fleece on a forming belt, in particular in the course of the production of material plates, according to the preamble of patent claim 1.
  • the invention further relates to a method for spreading a fleece on a forming belt according to the preamble of patent claim 8.
  • a mixture of particles or fibrous materials and a binding agent is spread onto a forming or conveyor belt to form a fleece.
  • This mat of spread material is then, after any necessary pretreatment, subjected to continuous or discontinuous pressing, which can be carried out using pressure and/or heat.
  • material boards such as MDF (medium density fiberboard) or OSB (oriented strand board or chipboard) can be produced in this way.
  • the pressing usually takes place in a continuous belt press, in which a mat of spread material is fed to the pressing by means of a flexible belt, in particular a steel belt.
  • a large number of pressing cylinders exert pressure on the mat of spread material via the belt, while the mat of spread material is heated by heating plates.
  • Roller rods are usually arranged between the belt and the pressing cylinders to reduce friction and to transfer pressure.
  • Suitable methods and devices for producing such nonwovens are EP0069162B1 , EP0109456A1 , EP0230483B1 and EP0292581B1 known. What all of these disclosures have in common is that a device is arranged between a metering device and a forming belt that receives the fleece, in which device the material flow emerging from the metering device is distributed and deposited on the forming belt to form a fleece using suitable machine elements. Furthermore, these devices disclose discharge devices which, during the production of the fleece and with an adjustable profile across the width of the endlessly rotating forming belt, branch off material from the material flow in a targeted manner in order to achieve the specified density properties of the fleece. Some of these discharge devices also have options for feeding the discharged material to the fleece in a metered manner, preferably at another location or in a uniform manner.
  • the present invention is based on the object of improving the adjustability of the device for producing a fleece compared to the prior art.
  • the invention relates to a device for spreading a fleece on a forming belt that circulates endlessly below the device, in particular during the production of material plates from free-flowing material such as fibers or chips, wherein the device comprises an upper inlet opening for feeding the material and a lower outlet opening for discharging the material onto the forming belt, at least one distribution roller and one spreading roller transversely to the transport direction of the forming belt and a discharge device for removing material in sections, wherein a plurality of openings, the size of which can be adjusted, are arranged on the discharge device transversely to the transport direction and are operatively connected to a conveying device for the material passing through the openings in order to separate material from the device.
  • the solution to the problem for the above-mentioned device consists in that a cover plate and adjacent to it a plurality of slides with an opening are arranged in the discharge device, wherein in order to adjust the size of the opening the cover plate partially covers the opening and the cover plate and/or the slides are arranged displaceably by means of at least one actuator.
  • the adjustable openings increase in size in the direction of the material's fall, i.e. preferably have a fixed upper limit and an expanding opening opens downwards in the direction of the forming belt.
  • the lower limit on the forming belt side
  • an opening will be arranged in the device in such a way that a material flow hitting the discharge device or the openings hits an opening with its upper area and the lower area of the material flow is proportionally deflected downwards in the direction of the forming belt.
  • the lower end of the cover plate is arranged as the upper limit of the opening and the opening of a slider is arranged as the lower limit of the opening in the direction of fall of the material.
  • the cover plate In an advantageous embodiment, the lower end of the cover plate is arranged as the upper limit of the opening and the opening of a slider is arranged as the lower limit of the opening in the direction of fall of the material.
  • the cover plate In an advantageous embodiment, the lower end of the cover plate is arranged as the upper limit of the opening and the opening of a slider is arranged as the lower limit of the opening in the direction of fall of the material.
  • the slide with its opening is arranged to be movable essentially against the direction of material flow in the device (i.e. from top to bottom in the direction of the forming belt) in order to reduce the opening and in the direction of material flow in order to enlarge the opening.
  • At least one nozzle for pneumatic cleaning of parts of the discharge device can be arranged in the discharge device.
  • the cover plate can also have an opening and preferably be arranged in a size that essentially covers the range of movement of the slides. This essentially covers the slide and build-up between the slide and the cover plate can be scraped off by sliding them towards each other.
  • a further cover plate can be arranged opposite the first cover plate to the openings, whereby the further cover plate preferably exposes the area of the adjustable openings but covers the further area of the slides.
  • a cleaning effect can be achieved, at the same time a predetermined lower falling edge is provided across the width of the forming belt and starting from the discharge device, at which the material that remains in the device and is guided towards the forming belt. This means that, as was previously the case with the prior art, there are no irregular discharge edges at the lower end of the discharge device on the forming belt side.
  • the discharge device can be movable to adjust the position or location of the openings in the device.
  • it can also be arranged so that the height is adjustable relative to the forming belt. This serves to improve control depending on the type and/or density of the material or the material mixture. Material mixtures with a high proportion of recycled wood are now increasingly being used, which have a different throwing and distribution characteristics in the device. Changes in the grain size distribution can also make it necessary to arrange the discharge device in a different position or to change the angle of the discharge device in relation to the distribution rollers.
  • a preferred control or regulation device will provide a measuring device for the basis weight or the density distribution of the fleece at a predetermined distance from the device and, via the measurement result or a control algorithm interpreting the measurement result, will change the device or the position of the discharge device and/or the slides/cover plates relative to one another in order to achieve the predetermined target value.
  • a generic method for spreading a fleece on a forming belt that circulates endlessly below a device for spreading material essentially consists in that material is fed into the device through an upper inlet opening and onto the forming belt via a lower outlet opening, and the material is essentially distributed by a distribution roller in the device and transferred to the forming belt by means of at least one spreading roller, and wherein material is removed in sections by a discharge device in the device transversely to the transport direction of the endless forming belt, in that several openings, the size of which can be adjusted, feed the material passing through to a conveyor device for removal from the device.
  • the invention for the method consists in that the adjustable openings of the discharge device are formed by a cover plate and a plurality of slides with openings, wherein the opening of a slide is partially covered by the cover plate to reduce the opening by moving the cover plate and/or the slides towards each other by means of at least one actuator.
  • the lower end of the cover plate is preferably used as the upper limit of the opening and the opening of a slider as the lower used to limit the opening.
  • the slide with its opening be displaced substantially against the direction of material flow to reduce the opening and in the direction of material flow to enlarge the opening.
  • At least one nozzle for pneumatic cleaning of parts of the discharge device can be used in the discharge device.
  • the cover plate can also have an opening and preferably be used in a size which allows the movement range of the sliders to be substantially covered.
  • a further cover plate can be placed opposite the first cover plate to the openings, whereby the further cover plate exposes the area of the adjustable openings but covers the lower area of the sliders.
  • the discharge device in order to adjust the position or location of the openings in the device, can be arranged to be movable, in particular height-adjustable relative to the forming belt.
  • the flow of material hitting the discharge device is guided to the openings in such a way that the upper part of the flow facing away from the forming belt is guided into the opening and, depending on the size of the opening, the lower part of the flow is deflected, i.e., for example, held back by the slide and guided downwards in the direction of the forming belt.
  • Figure 1 In a longitudinal section through the device 10 along the transport direction 13 of the endlessly circulating forming belt 12, the material flow of the material 1 through the device and the production of the fleece 11 on the forming belt 12 is shown schematically.
  • the material 1 enters the device 10 in the direction of fall 9 through an upper opening, is spread and distributed in the device by at least one distribution roller 14 and finally reaches at least one spreading roller 15 via optional rakes 7, which deposits the material 1 on the forming belt 12.
  • the optional rakes 7 serve to deflect part of the material and to let part through in the throwing or falling direction in order to enable a predetermined distribution within the device.
  • At least one discharge device 2 is arranged in the device 10, which in an exemplary position in the device 10 in Figure 1 is shown and in Figure 2 is explained in detail by an enlarged representation.
  • different material flows are formed by the direction of fall 9 and/or the distribution rollers 14, which can also be controlled accordingly by the optional rakes 7 if necessary. If a part of the material 1 now hits the discharge device 2 as a material flow, the material flow is proportionally deflected downwards in the direction of the forming belt 12 or the spreading rollers 15 and another part is fed through the openings 3, if these are open, in the discharge device 2 to a conveyor device 21, which removes the material 1 from the device 10.
  • a conveyor screw (not shown) can be arranged along an axis 16 transverse to the forming belt 12 in a screw trough 19 which collects the material 1 and transports the material 1 in the screw trough.
  • the opening 3 is formed by an opening 6 in a slide 5 and is covered by a cover plate 4 to adjust the size of the opening 3. If an opening 3, which is arranged in a plurality across the width of the device 10, or transversely to the transport direction 13 of the forming belt 12, is to be changed in size, the corresponding slide 5 with its opening 6 and/or the corresponding cover plate 4 associated with this opening can be moved. The more the cover plate 4 covers the opening 6 of the slide 5, the smaller the opening 3 will be.
  • the adjustability of the device 10 can be significantly improved if the opening 3 is formed from two different movable sheets which together form an adjustable opening 3.
  • adjustability is ensured to an outstanding extent when the upper limit of the opening 3 is arranged essentially at the height of the incoming material 1, and only the lower limit of the opening 3 is adjusted in height, wherein the material 1 preferably only impacts the lower limit of the opening 3 and is deflected in the direction of the forming belt 12. This prevents material 1 impacting above the opening 3 from falling downwards and hindering or even blocking the passage of the material 1 in the passage direction 8 at the height of the opening 3.
  • an actuator 17 with a connection 18 to a slide 5 is shown in order to move the slide 5.
  • the opening 3 is reduced by the movement of the slide 5 from bottom to top and vice versa is enlarged accordingly when the slide 5 is moved downwards by the actuator 17.
  • a further cover plate 4' can be arranged, which covers the lower area of the slide 5 and at the same time prevents material 1 from getting into the interior (outside the screw trough 19) of the discharge device 2.
  • the further cover plate 4 ⁇ can also be arranged on the other side of the slide 5 in order not to offer the material 1 sliding along the slide 5 an unnecessary friction point.
  • a pneumatic nozzle 20 can be arranged within the discharge device 2 in order to convey in particular clogging material 1 back into the device 10 or into the screw trough 19.

Landscapes

  • 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)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (15)

  1. Dispositif pour l'étalement d'un non-tissé (11) sur une bande de formage (12) tournant sans fin en dessous du dispositif (10), en particulier au cours de la fabrication de panneaux de matériau à partir d'un matériau capable d'écoulement (1) tel que des fibres ou des copeaux, lequel dispositif (10) comprend :
    - une ouverture d'entrée supérieure pour l'introduction du matériau (1) et une ouverture de sortie inférieure pour la dépose du matériau (1) sur la bande de formage (12),
    - au moins un rouleau de répartition (14) et un rouleau de dispersion (15) transversaux par rapport au sens de transport (13) de la bande de formage (12) et
    - un dispositif d'extraction (2) pour le retrait par sections de matériau (1), le dispositif d'extraction (2) comportant transversalement par rapport au sens de transport (13) plusieurs ouvertures (3) de taille réglable qui sont en liaison active, pour extraire du matériau (1) du dispositif (10), avec un dispositif de transport (21) pour le matériau (1) passant à travers les ouvertures (3)
    caractérisé en ce que sont disposés dans le dispositif d'extraction (2) une tôle de couverture (4) et plusieurs volets coulissants (5) munis d'une découpe (6), la tôle de couverture (4) couvrant partiellement la découpe (6) pour régler la taille de l'ouverture (3) et la tôle de couverture et/ou les volets coulissants (5) étant disposés avec possibilité de translation au moyen d'au moins un vérin (17).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'extrémité inférieure de la tôle de couverture (4) est disposée comme délimitation supérieure de l'ouverture (3) dans la direction de chute (19) du matériau (1) et la découpe (6) d'un volet coulissant (5) comme délimitation inférieure de l'ouverture (3).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que, avec une tôle de couverture (4) fixe, le volet coulissant (5) muni de sa découpe (6) est disposé, en vue du réglage de l'ouverture (3), de façon à pouvoir se déplacer sensiblement en sens inverse du sens d'écoulement du matériau pour réduire l'ouverture (3) et dans le sens d'écoulement du matériau pour agrandir l'ouverture (3).
  4. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'au moins une buse (20) est disposée dans le dispositif d'extraction (2) pour le nettoyage pneumatique de parties du dispositif d'extraction (2), en particulier des ouvertures (3).
  5. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que la tôle de couverture (4) comporte également une découpe et est disposée de préférence avec une taille qui recouvre sensiblement la zone de déplacement des volets coulissants (5).
  6. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'une autre tôle de couverture (4') est disposée en face de la tôle de couverture (4) vers les ouvertures (3), l'autre tôle de couverture (4') dégageant de préférence la zone des ouvertures réglables (3) mais couvrant l'autre partie des volets coulissants (5).
  7. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que, en vue du réglage de la position des ouvertures (3) dans le dispositif (10), le dispositif d'extraction (2) est disposé de façon mobile, en particulier de façon réglable en hauteur par rapport à la bande de formage (12).
  8. Procédé pour l'étalement d'un non-tissé (11) sur une bande de formage (12) tournant sans fin en dessous du dispositif (10) pour l'étalement du matériau (1), en particulier au cours de la fabrication de panneaux de matériau à partir d'un matériau capable d'écoulement (1) tel que des fibres ou des copeaux,
    dans lequel du matériau (1) est amené dans le dispositif (10) à travers une ouverture d'entrée supérieure et le matériau (1) est amené sur la bande de formage (12) à travers une ouverture de sortie inférieure et le matériau (1) est réparti pour l'essentiel dans le dispositif par un rouleau de répartition (14) et amené sur la bande de formage au moyen d'au moins un rouleau de dispersion (15) et
    dans lequel un dispositif d'extraction (2) dans le dispositif (10) retire par sections du matériau (1) transversalement par rapport au sens de transport (13) de la bande de formage (12) sans fin, par le fait que plusieurs ouvertures (3) de taille réglable amènent le matériau (1) passant à travers à un dispositif de transport (21) pour l'enlèvement hors du dispositif (10),
    caractérisé en ce que les ouvertures réglables (3) du dispositif d'extraction (2) sont formées par une tôle de couverture (4) et plusieurs volets coulissants (5) munis de découpes (6), la découpe (6) d'un volet coulissant (5) étant partiellement recouverte par la tôle de couverture (4) pour réduire l'ouverture (3) par le fait que la tôle de couverture (4) et/ou les volets coulissants (5) sont déplacés par au moins un vérin (17).
  9. Procédé selon la revendication de procédé précédente, caractérisé en ce que l'extrémité inférieure de la tôle de couverture (4) est utilisée comme délimitation supérieure de l'ouverture (3) dans la direction de chute (19) du matériau (1) et la découpe (6) d'un volet coulissant (5) comme délimitation inférieure de l'ouverture (3).
  10. Procédé selon l'une des revendications de procédé précédentes, caractérisé en ce que, pour régler l'ouverture, le volet coulissant (5) muni de sa découpe (6) est déplacé sensiblement en sens inverse du sens d'écoulement du matériau pour réduire l'ouverture (3) et dans le sens d'écoulement du matériau pour agrandir l'ouverture (3).
  11. Procédé selon l'une des revendications de procédé précédentes, caractérisé en ce qu'au moins une buse (20) est disposée dans le dispositif d'extraction (2) pour le nettoyage pneumatique de parties du dispositif d'extraction (2), en particulier des ouvertures (3).
  12. Procédé selon l'une des revendications de procédé précédentes, caractérisé en ce que la tôle de couverture (4) comporte également une découpe et est utilisée de préférence avec une taille qui recouvre sensiblement la zone de déplacement des volets coulissants (5).
  13. Procédé selon l'une des revendications de procédé précédentes, caractérisé en ce qu'une autre tôle de couverture (4') se trouve en face de la tôle de couverture (4) vers les ouvertures (3), l'autre tôle de couverture (4') dégageant de préférence la zone des ouvertures réglables (3) mais couvrant la partie inférieure des volets coulissants (5).
  14. Procédé selon l'une des revendications de procédé précédentes, caractérisé en ce que, en vue du réglage de la position ou du placement des ouvertures (3) dans le dispositif (10), le dispositif d'extraction (2) est disposé de façon mobile, en particulier de façon réglable en hauteur par rapport à la bande de formage (12).
  15. Procédé selon l'une des revendications de procédé précédentes, caractérisé en ce que le flux de matériau (1) atteignant le dispositif d'extraction (2) est guidé vers les ouvertures (3) de telle manière que la partie supérieure du flux opposée à la bande de formage est guidée dans l'ouverture (3) et, selon la taille de l'ouverture (3), la partie inférieure est retenue par le volet coulissant (5) et guidée vers le bas en direction de la bande de formage (12).
EP19175961.2A 2018-05-22 2019-05-22 Dispositif et procédé d'étalement d'un non tissé sur une bande de formage Active EP3572197B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018112166.0A DE102018112166A1 (de) 2018-05-22 2018-05-22 Vorrichtung und Verfahren zur Streuung eines Vlieses auf einem Formband

Publications (2)

Publication Number Publication Date
EP3572197A1 EP3572197A1 (fr) 2019-11-27
EP3572197B1 true EP3572197B1 (fr) 2024-12-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19175961.2A Active EP3572197B1 (fr) 2018-05-22 2019-05-22 Dispositif et procédé d'étalement d'un non tissé sur une bande de formage

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Country Link
EP (1) EP3572197B1 (fr)
CN (1) CN110509392B (fr)
DE (1) DE102018112166A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1840455A (en) * 1926-11-01 1932-01-12 Lea James Edward Apparatus for the measurement of granular materials
GB785394A (en) * 1955-09-22 1957-10-30 Changewood Corp Improvements relating to the manufacture of structures produced by depositing fibrous elements
GB840268A (en) * 1956-11-02 1960-07-06 Interwood Ag "a process and apparatus for the continuous manufacture of sheet-like articles from a pourable fibrous substance, in particular figured-wood sheets from synthetic wood shavings"
EP0069162B1 (fr) * 1981-07-04 1985-05-02 Carl Schenck Ag Procédé et dispositif pour contrôler la répartition de densité dans une nappe de particules dispersée
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
DE3271697D1 (en) * 1982-12-10 1986-07-17 Schenck Ag Carl Device for the production of particle board
EP0230483B1 (fr) * 1986-01-20 1990-03-28 Carl Schenck Ag Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé
EP0292581B1 (fr) * 1987-05-23 1990-11-14 Carl Schenck Ag Méthode pour répandre une nappe de copeaux
DE19916447A1 (de) * 1999-04-12 2000-10-19 Dieffenbacher Schenck Panel Formstation
NZ524304A (en) * 2000-08-11 2006-08-31 Flakeboard Company Ltd Process and device for gluing dried fibres designated for the production of fibreboards
DE102009054807A1 (de) * 2009-12-16 2011-06-22 Dieffenbacher GmbH + Co. KG, 75031 Verfahren und Streukopf zur Herstellung einer Streugutmatte aus zumindest einer orientiert gestreuten Schicht im Zuge der Herstellung von Holzwerkstoffplatten
JP3215714U (ja) * 2015-04-10 2018-04-12 メイフェア フェアメーゲンスフェアヴァルテゥングス エスエー パネルを製造するための装置と、この装置で製造されるパネル、この装置に備えらえる散布ヘッド及び外層散布ヘッド

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Publication number Publication date
DE102018112166A1 (de) 2019-11-28
CN110509392A (zh) 2019-11-29
CN110509392B (zh) 2022-10-14
EP3572197A1 (fr) 2019-11-27

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