EP1442857B1 - Device for distributing granular material onto a continously travelling support - Google Patents

Device for distributing granular material onto a continously travelling support Download PDF

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Publication number
EP1442857B1
EP1442857B1 EP20040001530 EP04001530A EP1442857B1 EP 1442857 B1 EP1442857 B1 EP 1442857B1 EP 20040001530 EP20040001530 EP 20040001530 EP 04001530 A EP04001530 A EP 04001530A EP 1442857 B1 EP1442857 B1 EP 1442857B1
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EP
European Patent Office
Prior art keywords
glued
spreading
rollers
wall elements
spread
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Expired - Fee Related
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EP20040001530
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German (de)
French (fr)
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EP1442857A3 (en
EP1442857A2 (en
Inventor
Hans-Joachim Schreiber
Matthias Graf
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Dieffenbacher GmbH and Co KG
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Dieffenbacher GmbH and Co KG
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Publication of EP1442857A3 publication Critical patent/EP1442857A3/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

Definitions

  • the invention relates to a device for scattering grit on a continuously moving pad according to the preamble of patent claim 1, see. to the DE-A-10053129 ,
  • Fiber opening rollers used to dissolve the fiber bales described above, as well as to break the fiber / glue nodes so-called Fiber opening rollers used. These are usually arranged between the Austragswalzenanowski the Dosierbunkers and the scattering head assembly.
  • Fiber opening rollers usually consist of 1 or 2 pairs of opening rollers, which rotate in opposite directions at very high speeds of 800 - 2000 revolutions per minute.
  • rotating disk rollers or spiked rollers which have rows arranged on the circumference spike, which engage between the spiked rows of the opposite roller.
  • the material flow is in this case driven by the gap formed between the spines.
  • Fiber bale opening rollers are known, which are driven in opposite directions rotating.
  • the rollers are designed as disc shafts with attached toothed disks. These toothed disks have so-called Auflösezähne, which are set counter to the direction of rotation sawtooth-like, wherein the opening teeth of the rollers mesh and form a meandering gap. Also in this known device, the material flow is driven through the gap formed between the opening rollers.
  • Object of the present invention is therefore to develop a device for spreading of grit in such a way that a high quality wood-based material board can be produced, wherein the scattering in particular an uncontrolled redistribution of the material to be spread in the transverse direction. should be avoided.
  • the material flow is driven after discharge from the dosing hopper through the rotating at very high speed and provided with release elements Auflensewalzenan Aunt. As a result, fiber bales are dissolved and smash fiber / glue nodes.
  • the material flow is catapulted with high kinetic energy into the calming chambers of the calming compartment.
  • the existing air streams together with the fibers of the stream are now directed down into the settling chambers. Although turbulences may continue to form in the individual calming chambers, due to the spatial limitation it is prevented that a significant redistribution of the material flow in the transverse direction can occur.
  • the material stream is fed directly onto a spreading roller arrangement arranged underneath, which spreads the material stream onto a forming belt running continuously below it.
  • Fig. 1 1 schematically shows a forming station 1 with dosing bunker 2, an opening roller arrangement 3, a calming fan 4, a spreading head arrangement 5 and a forming belt 6, onto which the material web 7 is sprinkled from glued fibers.
  • the material stream which preferably consists of glued fibers, is temporarily stored and distributed to an intended discharge width.
  • lignocellulosic particles of different sizes such as fibers, chips and the like are provided in the first place.
  • wood chips or wood fibers are used, which are discharged continuously with the aid of a bottom belt 8 and a Austragswalzenan Aunt 9 from the dosing bunker 2.
  • the dosing bunker 2 has a width which corresponds at least to the maximum plate width that is to be produced on the system.
  • the glued fibers are fed via the Austragswalzenan Aunt 9 of the dosing bunker 2 on the opening roller assembly 3, which consists of two counter-rotating rollers 10 driven.
  • the rollers 10 are, as can be seen from the illustration, arranged parallel to the axis in a horizontal plane next to each other.
  • rollers are equipped with spines or teeth.
  • rollers 10 are used, which in the DE 100 53 129 A1 are described in more detail.
  • the flow of glued fibers is forced through the narrow gap formed between the spines or teeth, thereby achieving fiber disintegration of fiber / sizing lumps.
  • the dissolved material stream is thrown after the opening roller assembly 3 in a immediately downstream arranged sedation 4.
  • the calming compartment 4 consists of a housing part in which a plurality of parallel wall elements 11 are arranged.
  • the wall elements 11 are preferably designed as sheets aligned longitudinally to the conveying direction of the forming belt 6 and subdivide the casing part into a plurality of settling chambers 12.
  • These settling chambers 12 formed between two wall elements 11 have a width B of 50 to 500 mm, preferably 150 mm (FIG. Fig. 2 ).
  • the wall elements 11 are formed at their upper, the opening rollers 10 facing region 13, each semicircular, the contour of the opening rollers 10 corresponding recessed.
  • the wall elements 11 can be arranged immediately following the opening roller assembly 3 and there remains only a small gap between rollers 10 and the upper edge of the wall elements 11 of the reassurance fan 4.
  • no fibers can be deposited on the upper edge of the wall elements 11 and a fiber - / Leimknoten Struktur can be prevented.
  • the wall elements 11 protrude from the opening roller assembly 3 in the vertical direction to just above the scattering roller assembly fifth
  • the material flow forced through the opening roller arrangement 3 is catapulted into the calming chambers 12 of the calming compartment 4 with high kinetic energy.
  • the existing air streams together with the fibers are now called partial streams passed down in the calming chambers 12.
  • turbulence in the individual calming chambers 12 may continue to arise, due to the spatial limitation, however, it is prevented that a significant redistribution of the material flow in the transverse direction can occur.
  • the scattering roll arrangement 5 consists of a plurality of scattering rolls arranged parallel and transversely to the conveying direction.
  • the spreader rollers are arranged along the conveying direction in a horizontal rising line to ensure a uniform dispersion and a height limit.
  • the scattering rollers are provided immediately below the calming fan 4 and promote the flowable goods, preferably the glued wood fibers against the conveying direction. By the rotation of the scattering rollers, the wood fibers are simultaneously sprinkled onto the continuously running under mold belt 6 as a non-woven fabric and fed to a subsequent pre-press station or a plate press.
  • an additional conveying device could also be provided following the calming compartments, which feeds the stream of glued fibers to a spreading head arrangement 5.
  • the additional conveying device is designed as a weighfeeder, which continuously promotes a controllable flow rate in the spreading head assembly, so that depending on the plate thickness and width of the scattering head assembly a predetermined amount is strewn on the forming belt.

Description

Die Erfindung betrifft eine Vorrichtung zum Streuen von Streugut auf eine kontinuierlich bewegte Unterlage gemäß Oberbegriff des Patentanspruchs 1, vgl. dazu die DE-A-10053129 .The invention relates to a device for scattering grit on a continuously moving pad according to the preamble of patent claim 1, see. to the DE-A-10053129 ,

Bei der Herstellung von Holzwerkstoffplatten, insbesondere Holzfaserplatten, besteht das Problem, daß durch den Transport der Fasern von den Refinern bis zum eigentlichen Abwurfpunkt im Streukopf sich sogenannte Faserballen bilden. Verursacht wird dies meist durch Wandreibung, Rückkämmeinrichtungen, Förderschnecken etc., die Materialumwälzungen hervorrufen und die Fasern zu kugelförmigen oder zigarrenförmigen Faseragglomeraten zusammenschließen. Diese Faserballen sind sehr unerwünscht, da sie in der fertigen Holzfaserplatte zu einer wolkenartigen Oberflächenstruktur führen und einen optischen Qualitätsmangel darstellen.In the production of wood-based panels, especially wood fiber boards, there is the problem that so-called fiber bales form by the transport of the fibers from the refiners to the actual discharge point in the scattering head. This is usually caused by wall friction, back combing, screw conveyors, etc., which cause material recirculation and combine the fibers into spherical or cigar-shaped Faseragglomeraten. These fiber bales are very undesirable because they lead in the finished wood fiber board to a cloud-like surface structure and represent a visual quality deficiency.

Weiterhin kann es in Vorrichtungen in denen sich ein Stoffstrom aus beleimten Holzpartikeln oder Fasern bewegt, zu Anbackungen und Ablagerungen kommen, die dann plötzlich durch Vibrationen oder andere Kräfte abgelöst werden und mit dem Stoffstrom mitgerissen werden. Diese Ablagerungen bestehen meist aus einem Faser-Leim-Gemisch das durch die lange Liegezeit bereits vollständig ausgehärtet ist. Diese Ablagerungen werden nachfolgend als Faser- /Leimknoten bezeichnet.Furthermore, in devices in which a stream of glued wood particles or fibers moves, caking and deposits occur, which are then suddenly detached by vibrations or other forces and entrained with the material flow. These deposits usually consist of a fiber-glue mixture which has already been fully cured by the long laytime. These deposits are referred to below as fiber / glue nodes.

Diese Faser- / Leimknoten können starke Beschädigungen an den Stahlbändern von kontinuierlichen Pressen verursachen. Zur Auflösung der oben beschriebenen Faserballen, sowie zur Zerschlagung der Faser- / Leimknoten werden sogenannte Faserauflösewalzen eingesetzt. Diese sind in der Regel zwischen der Austragswalzenanordnung des Dosierbunkers und der Streukopfanordnung angeordnet.These fiber / glue knots can cause severe damage to the steel belts of continuous presses. To dissolve the fiber bales described above, as well as to break the fiber / glue nodes so-called Fiber opening rollers used. These are usually arranged between the Austragswalzenanordnung the Dosierbunkers and the scattering head assembly.

Faserauflösewalzen bestehen üblicherweise aus 1 oder 2 Paar Auflösewalzen, die mit sehr hohen Drehzahlen von 800 - 2000 Umdrehungen pro Minute gegensinnig rotieren.Fiber opening rollers usually consist of 1 or 2 pairs of opening rollers, which rotate in opposite directions at very high speeds of 800 - 2000 revolutions per minute.

Aus der DE-AS 11 74 058 sind gegensinnig rotierende Scheibenwalzen oder Stachelwalzen bekannt, die am Umfang reihenförmig angeordnete Stachel aufweisen, die zwischen den Stachelreihen der gegenüberliegenden Walze eingreifen. Der Stoffstrom wird hierbei durch den zwischen den Stacheln gebildeten Spalt getrieben.From the DE-AS 11 74 058 In opposite directions rotating disk rollers or spiked rollers are known, which have rows arranged on the circumference spike, which engage between the spiked rows of the opposite roller. The material flow is in this case driven by the gap formed between the spines.

Weiterhin sind aus der DE 43 02 850 Faserballen-Auflösewalzen bekannt, die gegensinnig rotierend angetrieben sind. Die Walzen sind als Scheibenwellen mit aufgesetzten Zahnscheiben ausgebildet. Diese Zahnscheiben weisen sogenannte Auflösezähne auf, die entgegen der Drehrichtung sägezahnartig schräg gestellt sind, wobei die Auflösezähne der Walzen ineinandergreifen und einen mäanderförmigen Spalt bilden.
Auch bei dieser bekannten Vorrichtung wird der Stoffstrom durch den zwischen den Auflösewalzen gebildeten Spalt getrieben.Furthermore, from the DE 43 02 850 Fiber bale opening rollers are known, which are driven in opposite directions rotating. The rollers are designed as disc shafts with attached toothed disks. These toothed disks have so-called Auflösezähne, which are set counter to the direction of rotation sawtooth-like, wherein the opening teeth of the rollers mesh and form a meandering gap.
Also in this known device, the material flow is driven through the gap formed between the opening rollers.

Wie man sich leicht vorstellen kann, entstehen dabei sehr hohe Luftturbulenzen am Austritt der Faserauflösewalzen. Diese Luftturbulenzen sind sehr störend, da die Luftwirbel die leichten Fasern mit sich reißen und somit eine ungewollte, unkontrollierte Verteilung über die Breite erzeugen. Bei einer Anordnung der Faserauflösewalzen unmittelbar über der Streukopfanordnung, wird dadurch die Gewichtsverteilung auf dem Formband empfindlich gestört und das Streuergebnis negativ beeinflußt.As one can easily imagine, very high air turbulences arise at the exit of the fiber opening rollers. These air turbulences are very disturbing as the air swirls entrain the light fibers and thus create an unwanted, uncontrolled distribution across the width. With an arrangement of the fiber opening rollers immediately above the spreading head arrangement, the weight distribution on the forming belt is thereby disturbed and the spreading result is adversely affected.

Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung zum Streuen von Streugut derart weiterzubilden, daß eine qualitativ hochwertige Holzwerkstoffplatte hergestellt werden kann, wobei beim Streuen insbesondere eine unkontrollierte Umverteilung des Streugutes in Querrichtung. vermieden werden soll.Object of the present invention is therefore to develop a device for spreading of grit in such a way that a high quality wood-based material board can be produced, wherein the scattering in particular an uncontrolled redistribution of the material to be spread in the transverse direction. should be avoided.

Diese Aufgabe wird durch die im Patentanspruch 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in claim 1.

Der Stoffstrom wird nach dem Austrag aus dem Dosierbunker durch die mit sehr hoher Drehzahl rotierenden und mit Auflöseelementen versehene Auflösewalzenanordnung getrieben. Hierdurch werden Faserballen aufgelöst und Faser- / Leimknoten zerschlagen. Im direkten Anschluss an die Auflösewalzenanordnung wird der Stoffstrom mit hoher kinetischer Energie in die Beruhigungskammern des Beruhigungsfächers katapultiert. Die vorhandenen Luftströme zusammen mit den Fasern des Stoffstromes werden nun in den Beruhigungskammern nach unten geleitet. Es können zwar weiterhin Turbulenzen in den einzelnen Beruhigungskammern entstehen, aufgrund der räumlichen Begrenzung wird jedoch verhindert, dass es zu einer nennenswerten Umverteilung des Stoffstromes in Querrichtung kommen kann. Der Stoffstrom wird im Anschluss an den Beruhigungsfächer direkt auf eine darunter liegend angeordnete Streuwalzenanordnung aufgegeben, die den Stoffstrom auf ein darunter kontinuierlich laufendes Formband aufstreut.The material flow is driven after discharge from the dosing hopper through the rotating at very high speed and provided with release elements Auflösewalzenanordnung. As a result, fiber bales are dissolved and smash fiber / glue nodes. Immediately following the opening roller arrangement, the material flow is catapulted with high kinetic energy into the calming chambers of the calming compartment. The existing air streams together with the fibers of the stream are now directed down into the settling chambers. Although turbulences may continue to form in the individual calming chambers, due to the spatial limitation it is prevented that a significant redistribution of the material flow in the transverse direction can occur. Following the calming compartments, the material stream is fed directly onto a spreading roller arrangement arranged underneath, which spreads the material stream onto a forming belt running continuously below it.

Weitere vorteilhafte Merkmale der Erfindung ergeben sich aus der nachstehenden Beschreibung von Ausführungsbeispielen anhand der Zeichnungen. Es zeigt:

Figur 1 :
eine schematische Darstellung einer Formstation mit Auflösewalzenanordnung und nachgeschaltetem Beruhigungsfächer;
Figur 2 :
eine Teilansicht der Auflösewalzenanordnung mit Beruhigungsfächer und Streuwalzenanordnung gemäß des Schnittes II-II in Fig. 1.
Further advantageous features of the invention will become apparent from the following description of exemplary embodiments with reference to the drawings. It shows:
FIG. 1 :
a schematic representation of a forming station with Auflösewalzenanordnung and downstream calming fan;
FIG. 2 :
a partial view of the opening roller assembly with calming fan and scattering roller assembly according to the section II-II in Fig. 1 ,

In Fig. 1 ist schematisch eine Formstation 1 mit Dosierbunker 2, einer Auflösewalzenanordnung 3, einem Beruhigungsfächer 4, einer Streukopfanordnung 5 und einem Formband 6, auf das das Materialvlies 7 aus beleimten Fasern aufgestreut wird, dargestellt.In Fig. 1 1 schematically shows a forming station 1 with dosing bunker 2, an opening roller arrangement 3, a calming fan 4, a spreading head arrangement 5 and a forming belt 6, onto which the material web 7 is sprinkled from glued fibers.

Im Dosierbunker 2 wird der Stoffstrom, der vorzugsweise aus beleimten Fasern besteht, zwischengespeichert und auf eine vorgesehene Austragsbreite verteilt. Als Stoffstrom sind in erster Linie lignocellulosehaltige Teilchen unterschiedlicher Größe wie Fasern, Späne und dergleichen vorgesehen. Zur Herstellung von Platten werden meist mit Bindemitteln versehene Holzspäne oder Holzfasern verwendet, die mit Hilfe eines Bodenbandes 8 und einer Austragswalzenanordnung 9 aus dem Dosierbunker 2 kontinuierlich ausgetragen werden. Dabei besitzt der Dosierbunker 2 eine Breite, die mindestens der maximalen Plattenbreite entspricht, die auf der Anlage produziert werden soll. Die beleimten Fasern werden über die Austragswalzenanordnung 9 des Dosierbunkers 2 auf die Auflösewalzenanordnung 3 aufgegeben, die aus zwei gegensinnig rotierend angetriebenen Walzen 10 besteht. Die Walzen 10 sind, wie es aus der Darstellung ersichtlich ist, achsparallel in einer waagrechten Ebene nebeneinander liegend angeordnet.In the dosing bunker 2, the material stream, which preferably consists of glued fibers, is temporarily stored and distributed to an intended discharge width. As a stream lignocellulosic particles of different sizes such as fibers, chips and the like are provided in the first place. For the production of slabs provided with binders wood chips or wood fibers are used, which are discharged continuously with the aid of a bottom belt 8 and a Austragswalzenanordnung 9 from the dosing bunker 2. In this case, the dosing bunker 2 has a width which corresponds at least to the maximum plate width that is to be produced on the system. The glued fibers are fed via the Austragswalzenanordnung 9 of the dosing bunker 2 on the opening roller assembly 3, which consists of two counter-rotating rollers 10 driven. The rollers 10 are, as can be seen from the illustration, arranged parallel to the axis in a horizontal plane next to each other.

Wie es bereits in der Beschreibungseinleitung näher erläutert ist, sind diese Walzen mit Stacheln oder Zähnen bestückt. Vorteilhafterweise werden Walzen 10 eingesetzt, die in der DE 100 53 129 A1 näher beschrieben sind. Der Stoffstrom aus beleimten Fasern wird durch den engen zwischen den Stacheln oder Zähnen gebildeten Spalt getrieben, wodurch eine Faserauflösung bzw. Zerschlagung von Faser- / Leimklumpen erzielt wird. Der aufgelöste Stoffstrom wird im Anschluss an die Auflösewalzenanordnung 3 in einen unmittelbar nachgeschaltet angeordneten Beruhigungsfächer 4 geworfen.As already explained in more detail in the introduction, these rollers are equipped with spines or teeth. Advantageously, rollers 10 are used, which in the DE 100 53 129 A1 are described in more detail. The flow of glued fibers is forced through the narrow gap formed between the spines or teeth, thereby achieving fiber disintegration of fiber / sizing lumps. The dissolved material stream is thrown after the opening roller assembly 3 in a immediately downstream arranged sedation 4.

Der Beruhigungsfächer 4 besteht dabei aus einem Gehäuseteil, in dem eine Vielzahl paralleler Wandelemente 11 angeordnet sind. Die Wandelemente 11 sind vorzugsweise als längs zur Förderrichtung des Formbandes 6 ausgerichtete Bleche ausgebildet und unterteilen das Gehäuseteil in mehrere Beruhigungskammern 12. Diese zwischen zwei Wandelementen 11 gebildeten Beruhigungskammern 12 besitzen eine Breite B von 50 bis 500 mm, bevorzugt 150 mm (Fig. 2).The calming compartment 4 consists of a housing part in which a plurality of parallel wall elements 11 are arranged. The wall elements 11 are preferably designed as sheets aligned longitudinally to the conveying direction of the forming belt 6 and subdivide the casing part into a plurality of settling chambers 12. These settling chambers 12 formed between two wall elements 11 have a width B of 50 to 500 mm, preferably 150 mm (FIG. Fig. 2 ).

Wie es aus der Darstellung der Fig. 1 ersichtlich ist, sind die Wandelemente 11 an ihrem oberen, den Auflösewalzen 10 zugewandten Bereich 13, jeweils halbkreisförmig, der Kontur der Auflösewalzen 10 entsprechend ausgespart ausgebildet. Hierdurch können die Wandelemente 11 unmittelbar im Anschluss an die Auflösewalzenanordnung 3 angeordnet werden und es verbleibt nur ein kleiner Spalt zwischen Walzen 10 und Oberkante der Wandelemente 11 des Beruhigungsfächers 4. Durch diese Anordnung können sich keine Fasern auf der Oberkante der Wandelemente 11 ablagern und eine Faser- / Leimknotenbildung kann verhindert werden. Die Wandelemente 11 ragen ausgehend von der Auflösewalzenanordnung 3 in Vertikalrichtung bis kurz über die Streuwalzenanordnung 5.As it is from the representation of the Fig. 1 it can be seen, the wall elements 11 are formed at their upper, the opening rollers 10 facing region 13, each semicircular, the contour of the opening rollers 10 corresponding recessed. As a result, the wall elements 11 can be arranged immediately following the opening roller assembly 3 and there remains only a small gap between rollers 10 and the upper edge of the wall elements 11 of the reassurance fan 4. By this arrangement, no fibers can be deposited on the upper edge of the wall elements 11 and a fiber - / Leimknotenbildung can be prevented. The wall elements 11 protrude from the opening roller assembly 3 in the vertical direction to just above the scattering roller assembly fifth

Der durch die Auflösewalzenanordnung 3 getriebene Stoffstrom wird mit hoher kinetischer Energie in die Beruhigungskammern 12 des Beruhigungsfächers 4 katapultiert. Die vorhandenen Luftströme zusammen mit den Fasern werden nun als Teilströme in den Beruhigungskammern 12 nach unten geleitet. Es können zwar weiterhin Turbulenzen in den einzelnen Beruhigungskammern 12 entstehen, aufgrund der räumlichen Begrenzung wird jedoch verhindert, dass es zu einer nennenswerten Umverteilung des Stoffstromes in Querrichtung kommen kann.The material flow forced through the opening roller arrangement 3 is catapulted into the calming chambers 12 of the calming compartment 4 with high kinetic energy. The existing air streams together with the fibers are now called partial streams passed down in the calming chambers 12. Although turbulence in the individual calming chambers 12 may continue to arise, due to the spatial limitation, however, it is prevented that a significant redistribution of the material flow in the transverse direction can occur.

Im Anschluss an den Beruhigungsfächer 4 gelangen die in den einzelnen Beruhigungskammern 12 nach unten geleiteten Teilströme auf die darunter liegend angeordnete Streuwalzenanordnung 5. Die Streuwalzenanordnung 5 besteht aus mehreren parallel und quer zur Förderrichtung angeordneten Streuwalzen. Die Streuwalzen sind längs zur Förderrichtung in horizontal ansteigender Linie angeordnet, um eine gleichmäßige Streuung und eine Höhenbegrenzung zu gewährleisten. Die Streuwalzen sind dabei unmittelbar unterhalb des Beruhigungsfächers 4 vorgesehen und fördern die rieselfähigen Güter, vorzugsweise die beleimten Holzfasern entgegen der Förderrichtung. Durch die Rotation der Streuwalzen werden gleichzeitig die Holzfasern auf das darunter kontinuierlich laufende Formband 6 als Faservlies aufgestreut und einer nachfolgenden Vorpressstation oder einer Plattenpresse zugeführt.Subsequent to the calming compartments 4, the partial streams directed downwards in the individual calming chambers 12 reach the scattering roll arrangement 5 arranged underneath. The scattering roll arrangement 5 consists of a plurality of scattering rolls arranged parallel and transversely to the conveying direction. The spreader rollers are arranged along the conveying direction in a horizontal rising line to ensure a uniform dispersion and a height limit. The scattering rollers are provided immediately below the calming fan 4 and promote the flowable goods, preferably the glued wood fibers against the conveying direction. By the rotation of the scattering rollers, the wood fibers are simultaneously sprinkled onto the continuously running under mold belt 6 as a non-woven fabric and fed to a subsequent pre-press station or a plate press.

In einer weiter nicht dargestellten Ausführungsform könnte auch im Anschluss an den Beruhigungsfächer eine zusätzliche Fördervorrichtung vorgesehen sein, die den Stoffstrom aus beleimten Fasern einer Streukopfanordnung 5 zuführt. Die zusätzliche Fördervorrichtung ist dabei als Dosierbandwaage ausgebildet, die kontinuierlich eine regelbare Fördermenge in die Streukopfanordnung fördert, so dass je nach Plattendicke und -breite von der Streukopfanordnung eine vorgebbare Menge auf das Formband streubar ist.In a further embodiment, not shown, an additional conveying device could also be provided following the calming compartments, which feeds the stream of glued fibers to a spreading head arrangement 5. The additional conveying device is designed as a weighfeeder, which continuously promotes a controllable flow rate in the spreading head assembly, so that depending on the plate thickness and width of the scattering head assembly a predetermined amount is strewn on the forming belt.

Claims (3)

  1. Device for the spreading of glued spread materials, in particular chips or fibrous materials, in the process of manufacturing of wood-based material panels, by means of a metering bin for the discharge of the glued spread materials onto a dissolving roller arrangement comprising at least two adjacent rollers with dissolving elements which are rotating in opposite direction, and with a downstream spreader roller arrangement which makes the spreading of the spread material onto a forming belt possible, characterized in that a settling fan (4) is arranged immediately downstream the dissolving rollers (3) which comprises several wall elements (11) extending in conveying direction and arranged in parallel and along the conveyor direction, the wall elements (11) forming a multitude of settling chambers (12).
  2. Device for the spreading of glued spread materials as per patent claim 1, the wall elements (11) having a distance of 50 - 500 mm, preferably 150 mm.
  3. Device for the spreading of glued spread materials as per patent claim 1 or 2, a weighfeeder being arranged as conveyor between the settling fan (4) and the spreader roller arrangement (5).
EP20040001530 2003-02-03 2004-01-24 Device for distributing granular material onto a continously travelling support Expired - Fee Related EP1442857B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003104134 DE10304134A1 (en) 2003-02-03 2003-02-03 Device for spreading spreading material on a continuously moving surface
DE10304134 2003-02-03

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EP1442857A2 EP1442857A2 (en) 2004-08-04
EP1442857A3 EP1442857A3 (en) 2005-07-06
EP1442857B1 true EP1442857B1 (en) 2010-03-17

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Publication number Priority date Publication date Assignee Title
ITMO20100314A1 (en) * 2010-11-05 2012-05-06 Imal Srl DEVICE FOR FLUIDIFYING AND / OR ACCELERATING A FLOW OF INCOERENT MATERIALS IN THE FORM OF FIBERS, FLAKES OR CHIPS.
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EP1442857A2 (en) 2004-08-04
DE10304134A1 (en) 2004-08-05
DE502004010893D1 (en) 2010-04-29

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