EP3976334B1 - Dispositif et procédé de fabrication d'une nappe de fibres - Google Patents

Dispositif et procédé de fabrication d'une nappe de fibres Download PDF

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Publication number
EP3976334B1
EP3976334B1 EP20732745.3A EP20732745A EP3976334B1 EP 3976334 B1 EP3976334 B1 EP 3976334B1 EP 20732745 A EP20732745 A EP 20732745A EP 3976334 B1 EP3976334 B1 EP 3976334B1
Authority
EP
European Patent Office
Prior art keywords
forming belt
scattering space
outlet opening
guide plate
wall
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
EP20732745.3A
Other languages
German (de)
English (en)
Other versions
EP3976334A1 (fr
Inventor
Klaus Plutowsky
Stefan Sauer
Reinhard Schwinn
Daniel Schwartze
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
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Publication of EP3976334A1 publication Critical patent/EP3976334A1/fr
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Publication of EP3976334B1 publication Critical patent/EP3976334B1/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
    • B27N1/00—Pretreatment of moulding material
    • 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
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/029—Feeding; Proportioning; Controlling
    • 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
    • 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
    • B27N3/12—Moulding of mats from 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B27N7/005—Coating boards, e.g. with a finishing or decorating layer

Definitions

  • the invention relates to a device for producing a mat of material, preferably in the course of producing a pressed material mat for the production of material panels according to patent claim 1.
  • the invention further relates to a method for producing a fleece from material, preferably in the course of producing a pressed material mat for the production of material panels according to patent claim 8.
  • a material usually a mixture of particles or fibrous substances and a binding agent, is scattered to form a mat of grit on a forming or conveyor belt, with the mat of grit then being subjected to any necessary pre-treatment and finally to compression .
  • the pressing can take place continuously or discontinuously by means of pressure and heat.
  • these are chipboard, fiberboard or chipboard. Scattering is done in one or more layers as required, the need for multiple layers usually occurring in the manufacture of thicker panels. However, different layers can also be desired in the production of thin boards, especially if there are special requirements between the middle layer and the top layers.
  • boards that can be painted on one side are desired, which can serve as the rear walls of the cupboard and should have the desired grain/color at least on the inside of the cupboard.
  • the negative pressure chambers can be adjusted differently over the width of the forming belt with regard to the negative pressure.
  • the disclosures above are suitable for generating single-layer fiber mats, also called pressed material mats, preferably in the course of the production of medium-density fiberboard (MDF), which is designed to be relatively homogeneous in its structure.
  • MDF medium-density fiberboard
  • the object of the present invention is to provide a device and a method with which it is possible to produce a reproducible layered structure of an endless mat or fleece that is uniform and stable during industrial production in a generic device.
  • the invention understands “material” to mean suitable particles, fibers, chips or the like, which are preferably, but not necessarily, free-flowing. Material from a recycling process can particularly preferably be involved, in which case the recycled content of the material can range from 0 to 100%. Materials with a cross section of less than 3 mm, preferably less than 2.5 mm, particularly preferably less than 2 mm, are particularly suitable.
  • the material can also be used in the middle layer in a multi-layer scattering process.
  • the (high) peripheral speed of the needle roller and the vacuum boxes influencing the air flow advantageously generate at least one turbulent air flow in the first scattering space, preferably in the vicinity of the guide plate near the outlet opening of the separating roller.
  • This turbulence affects the fine, lighter, smaller fractions of the material to an increased extent, as these have less momentum. In this way, the fine particles are separated from the rest of the material flow and accumulate in the first scattering chamber in the opposite direction to the production direction.
  • the invention and the separation in the device for producing the fleece create a fine surface on the underside (on the forming belt side).
  • the same device could be arranged mirror-inverted on the forming belt, or just one application device for fine material is downstream.
  • the guide plate can be arranged on the wall from the outlet opening, with the guide plate preferably at least initially following the tangent to the outlet opening at the radius of the wall.
  • the guide plate thus begins directly at the outlet opening, the so-called outlet opening being located at the point at which the radius of the wall begins to widen and the guide plate is at least initially a tangent to the circular radius of the wall.
  • the guide plate is arranged in an adjustable and/or bendable manner longitudinally and transversely to the forming belt, with the guide plate particularly preferably being designed in several parts longitudinally and/or transversely.
  • the gradient arranged in the direction of the forming belt and thus the guidance of the material in the direction of the forming belt can be adjusted.
  • different distances to the forming belt can be set across the width in and transverse to the transport direction of the forming belt. This results in a three-dimensionally adjustable profile of the guide plate, which at the same time serves as the upper limit of the first scattering space.
  • a second wall reaching up to the chute preferably designed as a metal sheet partially enclosing the separating roller, can be arranged in the first scattering space in the direction of rotation of the separating roller after the outlet opening. This makes it possible to show or hide the influence of the separating roller on the turbulence, in particular if the second wall or the enclosing sheet metal is adjustable and the angle sweeping through the housing around the separating roller can thus be adjusted.
  • a conductor track can be arranged at the entry opening at the beginning of the second wall, which is preferably designed to be adjustable, movable and/or telescoping.
  • This conducting track has the task of being used as a further conducting element, which guides the material, compared to the first conducting plate of the first scattering space. By appropriate adjustment, it can reduce the turbulence in the first scattering space affect, for example, in which it reduces the scattering space and / or gives up more or less air in the inlet opening between the separating roller and the second wall.
  • it is adjustable, movable and/or possibly also telescopic in order to be able to adjust the distance between the forming belt and the guide plate, ie the opening.
  • the conducting path can also influence the amount of material which passes from the first scattering space into the second scattering space.
  • a trail can be arranged in the transport direction on the output side of the first spreading space, which can preferably be adjusted in its contact length on the nonwoven lying on the forming belt by means of an adjusting drive.
  • the train can smooth the surface of the fleece, but it also serves to seal off the air in the litter area from the environment. It is advantageous if the contact length and thus the weight of the train on the fleece can be adjusted by means of an actuator. Since a flexible element, such as a mat or a carpet-like structure, is preferably used, it can be rolled up or down by an actuator, for example. Alternatively, part of the train could rest on a projection, preferably formed by part of the guide plate, and be pushed up or down on it by the actuator.
  • a further scattering space can be arranged on the first scattering space counter to the transport direction of the forming belt, with further vacuum boxes preferably being arranged on the lower side of the forming belt.
  • fine material can be enriched in the expanded second scattering space and is preferably deposited there on the surface of the forming belt by the vacuum boxes.
  • a vacuum connection can be arranged on the second scattering space, preferably on the end facing away from the first scattering space. This serves, for example, to adjust the scattering behavior in the second and, to a certain extent, also in the first scattering space.
  • an air guiding device for adjusting the supply air can be arranged between the forming belt and the air guiding device, which is particularly preferably adjustable in sections across the width of the forming belt. Plates are then preferably arranged across the width, which can be moved toward or away from the forming belt in the manner of sluice gates and let in more or less air depending on the gap between them.
  • the tests have shown that the above-mentioned range of permeability is optimal for controlling the turbulence and for optimal depositing of the material on the forming belt.
  • a sieve preferably a harp sieve, can be arranged between the first and the second scattering space.
  • This arrangement of the harp screen has the advantage that a transfer of overly large or coarser material particles from the first to the second scattering space is avoided and the surface quality is improved.
  • the distance between the train and/or the guide plates and the forming belt can be reduced at least in sections from the outlet opening, preferably along a parabola or hyperbola. This applies to the first scattering space in the direction of transport and in the opposite direction to the second scattering space.
  • a profile that meshes with the elevations of the separating roller can be arranged on the second wall, with the profile preferably being arranged in the direction of rotation of the separating roller at the start of the second wall.
  • the material leaves the outlet opening or emerges from the wall essentially parallel or at least with its predominant vectorial component parallel to the forming band.
  • the drawing shows a device for producing a fleece (not shown) or a pressing material mat on a forming belt 2, which is guided endlessly in the transport direction 13 from right to left.
  • a pressing device and, if necessary, further plant parts necessary for the process are arranged after the device 1 .
  • a dosing device 22 is used to supply the necessary material to the device 1 in a pre-dissolved and metered manner.
  • the material on a metering belt 17 is fed in a predetermined quantity and/or height to a knock-off roller or metering roller 18 in an exemplary metering device 22 .
  • This metering roller 18 transfers the material metered to a chute 5, which transfers the material to a separating roller 3 at its other end, which dissolves the material through its rotation and through the elevations 31, for example spikes or pins, arranged on the surface of the separating roller 3.
  • the dosing device 22 and specifically the dosing roller 18 are provided with a housing 19, for example.
  • flaps 20 with associated actuators 21 can be arranged to control the air entrained by the material and/or supply air.
  • the walls 16 of the chute 5 can be arranged to be adjustable in terms of their angle to one another, preferably in an automated manner.
  • the dissolved material is guided in the direction of rotation 29 of the separating roller 3 along a delimiting wall 4 until it is transferred to a first scattering space 27 of the device 1 at an outlet opening 26 .
  • the wall 4 essentially accompanies the radius 38 of the separating roller 3.
  • the spreading space 27 is formed at the bottom by the forming belt 2 and at the top by a guide plate 7 and correspondingly proportionately by the separating roller 3 or by parts of the wall 4 and a second wall 6 designed as a plate limited in return.
  • Air can be supplied to the first scattering space 27 at any point in order to influence the turbulence in the scattering space. This supply air can be controlled or regulated via actuators (not shown) and/or via supply air flaps (not shown). These are preferably adjustable or arranged in sections over the width of the forming belt 2 .
  • the second wall 6 preferably a plate designed similarly to the wall 4 as a return, is connected to a wall 16 of the chute 5 in the direction of rotation 29 of the separating roller 3 .
  • a profile 30 can be arranged, which meshes with the elevations 31 of the separating roller 3; see the circular mark and a separate rotated sectional drawing at the bottom left of the drawing. This serves to introduce as little entrained and accelerated air as possible into the return of the second wall 6 and at the same time to clean the elevations 31 with a correspondingly sharp contour.
  • first scattering space 27 and the second scattering space are separated from one another by a sieve (not shown), for example a harp sieve, and form two separately adjustable storage areas 14 and 15.
  • a sieve for example a harp sieve
  • the representation of the two storage areas is purely schematic.
  • the separation between the two scattering spaces in the area of the entry opening of the separating roller 3 to the wall 6 and a perpendicular to the forming belt 2 is assumed technologically.
  • the scattering space 28 is also covered by a guide plate 8, which is preferably designed to be adjustable or changeable like the guide plate 7.
  • the side walls delimiting the long sides of the forming strip are technologically necessary, but are not reflected in the drawings or in the description.
  • a vacuum connection 12 can be assigned to the second scattering space 28 , which vacuum connection 12 preferably applies to the scattering space 28 again in a segmented manner adjustable over the width of the forming belt 2 .
  • an air guiding device 32 for supply air can also be arranged, which is arranged at the entrance of the forming belt 2 to the scattering space 28 .
  • This air ducting device 32 can consist, for example, of a plurality of metal sheets 33 arranged transversely to the forming belt 2, which adjust the access of the air from outside the device 1 to the second scattering space 28 via their distance from the forming belt 2, cf. the circular marking and the corresponding rotated sectional drawing on the right below in the drawing. Actuators for displacement are shown only as double arrows.
  • material is thus transferred from the dosing device 22 into the chute 5 , separated by the subsequent separating roller 3 and guided along the wall 4 and introduced into the first scattering space 27 via an outlet opening 26 .
  • a turbulent flow will usually form there.
  • the placement of the material and the degree of separation can also be influenced by the vacuum boxes 10 .
  • the smaller/lighter material will concentrate and can be removed from the first scattering space 27 through the harp screen and through the vacuum boxes 11 and/or the vacuum port 12 in the second scattering space 28 .
  • This separated material portion is now enriched in the second scattering space 28 as a very fine material and there on the discarded form tape.
  • a very thin covering layer of the pressing material mat is thus formed in the second scattering space 28, which is covered by the coarser material in the first scattering space 27.
  • the definition of the first and second scattering space 27, 28 results from the path of the material flow and not from the chronological sequence of deposition on the forming belt.
  • a conductor track 9 can be arranged between the two scattering spaces 27 and 28 or at the beginning of the scattering space 27 in the transport direction 13 of the forming belt 2 .
  • This interconnect 9 can be designed like a sieve or solid.
  • This interconnect 9 is preferably connected to the entry opening between the wall 6 arranged as a return and the separating roller, most preferably in the direction of rotation 29 directly at the start of the wall 6.
  • This interconnect 9 provides a further possibility for influencing the volume of the scattering space 27. This results in controllable effects on the air turbulence or the material flow in the scattering space 27.
  • the conductor track 9 is arranged movably in the scattering space 27, telescopically and/or adjustable at a fixed point (connection to wall 6).
  • the size of the interconnect 9 can be adjusted by telescoping, for example if the interconnect 9 is pivoted at a connection to the wall 6 as shown in the drawing using the double arrow.
  • pivoting and/or increasing/reducing the length of the interconnect 9 not only is the size of the opening between the forming strip 2 and the interconnect 9 adjustable, but also the volume of the scattering space 27.
  • the output-side area of the device 1 can be designed as shown and described below:
  • the wall 4 forms an outlet opening 26 at the end of the wall 4, with the guide plate 7 adjoining the wall 4 adjacent to or directly adjoining it, which in the present example is arranged substantially vertically and thus perpendicularly to the forming belt.
  • the guide plate can be adjusted by various adjusting means, here adjusting drives 23 and adjusting drives 37 . It can preferably be adjusted in height or distance from the forming belt 2 by means of the adjusting drive 23 and will be arranged on the wall in a correspondingly displaceable manner.
  • the wall 4 can also be telescopic, so that the outlet opening 26 or the angle at which the material emerges relative to the forming belt 2 can be changed.
  • the outlet opening will preferably be located in a range from 7 to 11 o'clock if a clock face were to be projected onto the separating roller 3 .
  • the guide plate 7 is therefore suitable for following any adjustments to the outlet opening 26 and thus the outlet angle of the material in relation to the forming belt 2 .
  • the lower end of the guide plate 7 will preferably have a rounding, a curvature, a radius or an arc 36, which supports the attachment of the material to the forming belt 2 and, if necessary, defines the height of the fleece.
  • a trail 24 is particularly preferably arranged downstream of the guide plate 7 and particularly preferably of the sheet 36 in the transport direction. This train 24 will smooth the surface of the fleece and support the compression or the deaerating of the fleece by the vacuum boxes 10 in the deposition area 14 . So that the contact surface of the train on the fleece can be adjusted, this can also be adjustable in length by means of an adjusting drive 25 and, for example, be rolled up or drawn in.
  • a housing 35 can also be arranged in the device on the output side of the forming belt.
  • the exit angle of the material will primarily be towards the forming belt 2.
  • the coarser material is slowed down more on the guide plate 7 and can approach the forming belt 2 directly and sucked in, whereas the lighter material fraction will remain in the turbulence of the scattering space 27 .
  • This makes it possible to separate this in the direction of the second scattering space 28 through the screen 9 and deposit it there first on the forming belt. possibly it may make sense to do without the screen 9.
  • various influences can be exerted on the material or its movement in the scattering spaces 27/28 by sensible designs or arrangements of the guide plates 7 and 8.
  • contraption 20 flap 2. form tape 21 actuator for 20 3. separation roller 22.
  • dosing device 4. wall 23 Actuator (vertical of 7) 5. drop chute 24. train 6.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Nonwoven Fabrics (AREA)

Claims (15)

  1. Dispositif de fabrication d'un non-tissé à partir d'un matériau, de préférence au cours de la fabrication d'un mat de matière comprimée pour fabriquer des panneaux de matériau, comprenant :
    1.1 un système de dosage (22) pour distribuer de manière dosée le matériau dans un puits de chute (5),
    1.2 un cylindre de séparation (3) disposé sur l'autre extrémité du puits de chute (5) pour le matériau présentant une paroi (4) disposée dans la direction de rotation (29) du cylindre de séparation (3) et une ouverture de sortie (26) s'y raccordant,
    1.3 un premier espace de dispersion (27) pourvu d'une tôle de guidage (7) pour délimiter et guider au moins en partie le matériau sortant à l'ouverture de sortie (26) du cylindre de séparation (3),
    1.4 une bande de moulage (2) circulant sans fin dans la direction de transport (13) pour recevoir le matériau sortant de l'ouverture de sortie (26), sur un premier côté de la bande de moulage (2) dans le premier espace de dispersion (27) et
    1.5 avec des caisses sous vide (10) sur l'autre côté de la bande de moulage (2) pour générer un écoulement d'air se dirigeant en direction de la bande de moulage (2) dans le premier espace de dispersion (27),
    1.6 caractérisé en ce que
    le vecteur de la direction de rotation (29) est orienté à l'opposé de la direction de transport (13) de la bande de moulage (2) lorsque la distance par rapport à la bande de moulage (2) est la plus faible au niveau du cylindre de séparation (3).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'un entraînement pour le cylindre de séparation (3) est disposé, lequel est approprié pour entraîner le cylindre de séparation (3) de 25 à 2000 tours par minute.
  3. Dispositif au moins selon l'une des revendications précédentes, caractérisé en ce que la tôle de guidage (7) est disposée sur la paroi (4) à partir de l'ouverture de sortie (26), la tôle de guidage (7) suivant, de préférence au moins au début, la tangente à l'ouverture de sortie (26) au rayon (38) de la paroi (4), et/ou la tôle de guidage (7) étant disposée de manière à pouvoir être réglée et/ou déformée dans sa distance longitudinalement et/ou transversalement par rapport à la bande de moulage (2), la tôle de guidage (7) étant réalisée particulièrement de préférence en plusieurs parties longitudinalement et/ou transversalement.
  4. Dispositif au moins selon l'une des revendications précédentes, caractérisé en ce qu'une ouverture d'entrée est disposée à distance de l'ouverture de sortie (26) dans la direction de rotation (29) du cylindre de séparation (3), au début d'une deuxième paroi (6) et au niveau de l'ouverture d'entrée, une glissière (9) qui est réalisée de préférence de manière réglable, mobile et/ou télescopique.
  5. Dispositif au moins selon l'une des revendications précédentes, caractérisé en ce qu'une traîne (24) est disposée dans la direction de transport (13) du côté de la sortie de l'espace de dispersion (27), laquelle est de préférence réglable dans sa longueur d'appui sur le non-tissé reposant sur la bande de moulage (2) au moyen d'un mécanisme de réglage (25).
  6. Dispositif au moins selon l'une des revendications précédentes, caractérisé en ce qu'un autre espace de dispersion (28) est disposé au niveau du premier espace de dispersion (27) en sens inverse de la direction de transport (13) de la bande de moulage (2), d'autres caisses sous vide (28) étant de préférence disposées sur l'autre côté de la bande de moulage (2) de l'espace de dispersion (28).
  7. Dispositif selon la revendication 6, caractérisé en ce qu'un raccord de vide (12) est disposé au niveau du deuxième espace de dispersion (28), de préférence sur l'extrémité opposée au premier espace de dispersion (27), et/ou un dispositif de guidage d'air (32) est disposé à l'entrée de la bande de moulage (2) dans le deuxième espace de dispersion (28) pour le réglage de l'air d'alimentation entre la bande de moulage (2) et le dispositif de guidage d'air (32), lequel peut être réglé particulièrement de préférence par sections sur la largeur de la bande de moulage (2).
  8. Dispositif de fabrication d'un non-tissé à partir d'un matériau, de préférence au cours de la fabrication d'un mat de matière comprimée pour fabriquer des panneaux de matériau, dans lequel :
    8.1 un dispositif de dosage (22) distribue de manière dosée un matériau dans un puits de chute (5) selon une consigne correspondante,
    8.2 le matériau est transféré à l'autre extrémité du puits de chute (5) à un cylindre de séparation (3) disposé à cet endroit, accéléré par celui-ci et guidé le long d'une paroi (4) disposée dans la direction de rotation (29) du cylindre de séparation (3) vers une ouverture de sortie (26) qui s'y raccorde,
    8.3 le matériau est introduit dans un premier espace de dispersion (27) délimité par une tôle de guidage (7) et en ce que la tôle de guidage (7) guide au moins en partie le matériau sortant de l'ouverture de sortie (26),
    8.4 le matériau est reçu dans le premier espace de dispersion par une bande de moulage (2) circulant sans fin dans la direction de transport (13), et
    8.5 des boîtes sous vide (10) sur l'autre côté de la bande de moulage (2) génèrent un écoulement d'air se dirigeant en direction de la bande de moulage (2) dans le premier espace de dispersion (27)
    8.6 caractérisé en ce que
    le vecteur de la direction de rotation (29) est orienté à l'opposé de la direction de transport (13) de la bande de moulage (2) lorsque la distance par rapport à la bande de moulage (2) est la plus faible au niveau du cylindre de séparation (3).
  9. Procédé selon la revendication 8, caractérisé en ce que le cylindre de séparation (3) fonctionne à une vitesse de 25 à 2000 tours par minute.
  10. Procédé au moins selon l'une des revendications de procédé précédentes, caractérisé en ce que la tôle de guidage (7) guide au moins en partie le matériau à partir de l'ouverture de sortie (26) de la paroi (4) et dans lequel la tôle de guidage (7), de préférence au moins au début, forme une tangente à l'ouverture de sortie (26) au rayon (38) de la paroi (4) et/ou la tôle de guidage (7) est réglée longitudinalement et/ou transversalement dans sa distance par rapport à la bande de moulage (2) par réglage et/ou déformation, de préférence par sections et particulièrement de préférence par réglage d'une tôle de guidage en plusieurs parties longitudinalement et/ou transversalement.
  11. Procédé selon au moins l'une des revendications de procédé précédentes, caractérisé en ce qu'à distance de l'ouverture de sortie (26) dans la direction de rotation (29) est disposée une ouverture d'entrée au début d'une deuxième paroi (6) et, au niveau de celle-ci, une glissière (9) qui est réalisée de préférence de manière réglable, mobile et/ou télescopique.
  12. Procédé selon au moins l'une des revendications de procédé précédentes, caractérisé en ce que dans la direction de transport (13), du côté de la sortie de l'espace de dispersion (27), le non-tissé est lissé par une traîne (24) dont la longueur d'appui sur le non-tissé reposant sur la bande de formage (2) peut être réglée de préférence au moyen d'un mécanisme de réglage (25).
  13. Procédé selon au moins l'une des revendications de procédé précédentes, caractérisé en ce que le matériau est déposé sur la bande de moulage au moyen d'un autre espace de dispersion (28) qui est disposé au niveau du premier espace de dispersion (27) dans le sens opposé à la direction de transport (13), d'autres caisses sous vide (28) étant de préférence utilisées sur l'autre côté de la bande de moulage (2) pour générer un écoulement d'air sur la bande de moulage.
  14. Procédé selon la revendication 13, caractérisé en ce qu'une dépression est appliquée au niveau du deuxième espace de dispersion (28), de préférence au niveau du premier espace de dispersion (27), au moyen d'un raccord de vide (12), et/ou au niveau de l'entrée de la bande de moulage (2) dans le deuxième espace de dispersion (28), un dispositif de guidage d'air (32) règle l'air d'alimentation entre la bande de moulage (2) et le dispositif de guidage d'air (32), qui règle particulièrement de préférence l'air d'alimentation par sections sur la largeur de la bande de moulage (2).
  15. Procédé selon au moins l'une des revendications de procédé précédentes, caractérisé en ce que la distance de la traîne (24) et/ou des tôles de guidage (7, 8) par rapport à la bande de moulage (2) diminue à partir de l'ouverture de sortie (26) au moins par sections, de préférence le long d'une parabole ou d'une hyperbole.
EP20732745.3A 2019-05-26 2020-05-25 Dispositif et procédé de fabrication d'une nappe de fibres Active EP3976334B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019114038.2A DE102019114038A1 (de) 2019-05-26 2019-05-26 Vorrichtung und Verfahren zur Herstellung eines Vlieses
PCT/EP2020/064476 WO2020239713A1 (fr) 2019-05-26 2020-05-25 Dispositif et procédé de fabrication d'un non-tissé

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EP3976334B1 true EP3976334B1 (fr) 2023-09-06

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Publication number Priority date Publication date Assignee Title
US2635301A (en) * 1948-09-30 1953-04-21 Plywood Res Foundation Web or mat forming device
DE19640622C2 (de) * 1996-10-01 1998-11-12 Moeller Plast Gmbh Baustoff und Verfahren sowie Vorrichtung zur Herstellung eines Baustoffs
DE10025177B4 (de) * 2000-05-24 2004-04-15 Flakeboard Company Limited, St.Stephen Verfahren und Vorrichtung zur Auflösung von Ungleichmäßigkeiten in Holzfaserströmen
DE202004004037U1 (de) * 2004-03-12 2004-05-13 Binos Technologies Gmbh & Co. Kg Vorrichtung zur Herstellung von Span- un Faserplatten
CN101259633B (zh) * 2007-03-05 2011-04-27 上海人造板机器厂有限公司 中密度纤维板真空机械铺装机

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WO2020239713A1 (fr) 2020-12-03
EP3976334A1 (fr) 2022-04-06

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