EP0078960B1 - Procédé d'encollage de fibres, en particulier des copeaux, et appareillage pour la mise en oeuvre de ce procédé - Google Patents

Procédé d'encollage de fibres, en particulier des copeaux, et appareillage pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0078960B1
EP0078960B1 EP82109799A EP82109799A EP0078960B1 EP 0078960 B1 EP0078960 B1 EP 0078960B1 EP 82109799 A EP82109799 A EP 82109799A EP 82109799 A EP82109799 A EP 82109799A EP 0078960 B1 EP0078960 B1 EP 0078960B1
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EP
European Patent Office
Prior art keywords
glue
section
air
particles
pipe
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
Application number
EP82109799A
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German (de)
English (en)
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EP0078960A1 (fr
Inventor
Ag Bayer
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.)
Bayer AG
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Bayer AG
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Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Priority to AT82109799T priority Critical patent/ATE19606T1/de
Publication of EP0078960A1 publication Critical patent/EP0078960A1/fr
Application granted granted Critical
Publication of EP0078960B1 publication Critical patent/EP0078960B1/fr
Expired legal-status Critical Current

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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
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent

Definitions

  • the invention relates to a method for gluing particulate material in the form of chips, wafers, beaches, fibers, chips, dust or the like. from various, if necessary, pre-dried raw materials, in particular lignocellulosic materials such as wood, annual plants etc., but also from shredded material waste, by spraying glue onto the material dissolved into a particle veil during the pneumatic material conveyance in a tube.
  • a device for carrying out the method is shown, consisting of a pneumatic material conveying device with a conveying fan, from which a pipe section leads to a feeding device for the particulate material; an adjoining further pipe section, to which a gluing device with at least one spray nozzle is assigned.
  • Glue spray nozzles are used in a pipe section which are so related to the inner diameter of the pipe section that the spray cone completely fills the cross section.
  • the spray cone can only fill the full cross section of the pipe section if the glue particles sprayed from the glue spray nozzle also have the opportunity to be distributed over the full cross section. This is only the case if the amount of the goods placed in relation to the amount of air flow does not exceed a certain ratio, ie the goods transport device only conveys a comparatively small amount of goods.
  • the fine distribution device for the fiber material essentially consists of a stationary sieve cage or a perforated wall and an agitator arranged inside the cage. A metering device for the fiber material is connected upstream of this fine distribution device.
  • the agitator in the fine distribution device is driven and has agitator arms which expel the fiber material radially outwards through the openings of the cage in superimposed planes, so that in this way and without the particles touching a wall, a particle veil is formed which slides down in free fall and is designed in the form of a cylindrical surface.
  • This particle curtain is glued in two stages, one from the inside and one or more times from the outside, by successively spraying binder or glue onto the particles of the particle curtain.
  • the particle curtain itself has a considerable thickness, so that the glue jets, which are applied from the inside to the outside of the particle curtain, wet the particle curtain differently and penetrate into the particle curtain at different depths. Gluing from the inside takes place without pressure. Gluing from outside can be done under pressure.
  • agitators are connected downstream or two wetting systems are provided in series, through which the particles are passed one after the other. The mechanical effort for these special treatments is considerable.
  • DE-A-2 913 081 shows a method with which even wood chips of a flat design, such as are indispensable proportionately in a particle board, can be properly glued by the particle curtain Wood chips are turned between two gluing stages and the glue application in the first stage mainly on the front and in the second stage mainly on the back of the flat wood chips.
  • the particle veil is made very thin. Considerable mechanical effort is also required here.
  • a method and a device are known from DE-AS-2 653 683, wherein a spirally moving ring is formed from wood chips and the wood chips are provided with the binder.
  • a high-speed mixer shaft is used, which generates the spirally moving ring of chips along the inner wall of the mixing container.
  • Glue centrifugal tubes with their outlet openings for the binder are immersed in this ring of chips.
  • the mixer shaft is provided in the entire gluing and mixing zone with such centrifugal glue pipes over the circumference and axially distributed.
  • the glue centrifugal pipes not only have the function of delivering the binder to the chips, but they also exert a certain mixing effect on the wood chips of the ring of chips.
  • the binding agent emerges from chips in the form of drops and is carried away by the passing chips by blurring.
  • the binder is obtained by rubbing the Wood chips evenly distributed over all chips using constantly changing relative speeds. Despite the considerable length, a homogeneous distribution is not achieved because the binder in the form of drops is initially transferred to individual chips in a very concentrated manner.
  • DE-B-2 304 262 shows a very similar device, but the binding agent is added through tubes in the wall of the mixing container with a pressure-free feed. The openings of the tubes are in the ring of chips.
  • the binder in droplet form is removed from the chips at the free end of each feed tube and, by blurring and coming into contact with other chips, reaches other wood chips.
  • pneumatic chip transport devices with a conveying fan, feed screw, piping, separator, compensating vessel and knife lock or the like are known, which serve to transport the chips, for example from their production point to a further processing point.
  • the known systems convey the chips in a loosened form through pipelines with a more or less high proportion of transport air. Long transport routes can also be bridged without significant wear on system parts or an additional shredding effect on the chips.
  • the object of the invention is to achieve optimal gluing of the material in the sense of a high, homogeneous distribution of the glue and, at the same time, to keep the mechanical outlay comparatively low.
  • this is achieved in that the particle curtain is brought together on part of the cross section of the tube and the glue is mixed with the air in the other part of the cross section thus formed, which is kept free from the material, and that this glue-laden air is brought into contact with the particle curtain .
  • the particle curtain is initially guided in such a way that it is pressed together on part of the cross section of the pipe section, while the other part forms a free space, in which only the conveyor track is located.
  • the glue is then sprayed into this free space so that it mixes with the air present there or is finely distributed in it. This happens over a longer distance, whereby this glue-laden air is then brought into contact with the particle curtain and mixes with it.
  • a medium pressure system with an air pressure of approximately 0.2 to 0.8 bar is used for the pneumatic conveying of goods.
  • These medium pressure systems have the advantage of a relatively high consistency, i. H. the ratio of the amount of air to the amount of particles is favorable here.
  • the binder is not diluted too much.
  • the particle curtain absorbs the binder, which is sprayed or atomized without the risk that the inner wall of the pipe or the pipeline is unreasonably wetted by the binder, so that build-up phenomena could form there.
  • a material density is favorable in which about 150 liters of chips with a layer weight of 100 kg / m3 are conveyed or moved in one cubic meter of air.
  • a liquid pressure of about 200 bar can be useful for spraying on the glue in the tube of the pneumatic material conveying, but is not limited to this.
  • Two-substance nozzles that can be pressurized with air can also be used.
  • the gluing is expediently carried out by a plurality of spatially staggered nozzles which are arranged one behind the other in the tube.
  • the particle curtain can be evenly distributed by air baffles in the pipe of the pneumatic material conveying and thinned in front of the outlet openings of the nozzles. H. be kept away from these outlet openings so that the binder is first dissolved in air and sprayed on, only to then come into contact with the good particles in a finer distribution.
  • the device for carrying out the method is characterized in that the spray nozzle is assigned air baffles for merging the particle curtain on part of the cross section of the pipe section and for creating another part of the cross section free of material.
  • nozzles are located at the end of supply pipes for the glue, which penetrate the pipe from the outside in and end more or less centrally in the axis of the pipe.
  • a medium-pressure blower with an air pressure of approximately 0.2 to 0.8 bar is used as the conveying blower in order to achieve a high material density around the nozzles in the pipeline, which is just favorable for the application of the glue.
  • FIG. 1 shows the essential parts of a pneumatic material transport device for wood chips.
  • Air is drawn in by a conveying blower 2 via a filter 1 and pressed into the pipeline 3.
  • the pipeline 3 can be designed very differently depending on the local needs and consist of individual pipes 5 connected to one another via flanges 4. Only the essential parts of the pneumatic material transport device are shown here.
  • Downstream of the conveyor blower 2 and in the vicinity thereof, a feed device 6 with a corresponding lock is provided in order to be able to introduce the wood chips into the pneumatic conveyor system.
  • One or more sight glasses 7 can be installed in the pipeline 3 so that the air flow with the chips carried by it can be observed from the outside as a particle curtain in the form of a particle curtain.
  • the glue supply is provided on a pipe 5 or distributed in succession on several pipes.
  • a pump 8 is used to apply the liquid pressure to the liquid glue, which is approximately 200 bar.
  • a line 9 leads through the wall of the tube 5 and ends in a nozzle 10 through which the glue is sprayed.
  • the nozzle 10 is arranged approximately in the axis of the tube 5 and points in the direction of conveyance of the chip flow according to arrow II.
  • the nozzle 10 or the end of the line 9 is surrounded by funnel-shaped or conical air-guiding internals 12, which ensure that the outlet end of the nozzle 10 is kept free of chips.
  • the dissolved particle veil of the wood chips is expanded outwards at this point, so that the flow lines 13 result. This creates a pressure cone 14 behind the nozzle 10, in which the glue has the opportunity to mix with the air and to distribute it finely over a larger volume of air before it comes into contact with the particle curtain.
  • a plurality of nozzles 10 are preferably provided axially one behind the other in the pipe 5 or in the pipe 3, but a minimum distance of one meter is not exceeded. In this way it is possible to gradually increase the glue application and to achieve a particularly homogeneous distribution of the glue on the particle veil of the wood chips.

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  • 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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Nozzles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Hard Magnetic Materials (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Vending Machines For Individual Products (AREA)
  • Road Signs Or Road Markings (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Confectionery (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Claims (8)

1. Procédé pour coller des produits en forme de particules se présentant comme des copeaux, des fibres ou analogues par pulvérisation de colle sur le produit décomposé en un voile de particules pendant le transport pneumatique du produit dans un tube (5), caractérisé en ce que le voile de particules est rassemblé sur une partie de la section transversale du tube (5) et la colle est mélangée dans l'autre partie ainsi formée, exempte du produit, de la section transversale, avec l'air, et en ce que cet air chargé de colle est mis en contact avec le voile de particules.
2. Procédé selon la revendication 1, caractérisé en ce que, pour le transport pneumatique du produit on utilise un système à pression moyenne de 0,2 à 0,8 bar de pression d'air.
3. Procédé selon la revendication 1 ou la revendication 2, caractérisé en ce qu'on utilise comme colle un mélange de polyisocyanates de la série du diphénylméthane.
4. Dispositif pour mettre en oeuvre le procédé selon les revendications 1 à 3, constitué par un dispositif de transport pneumatique du produit comprenant une soufflante de transport (2) de laquelle une section de conduite tubulaire (3) mène à un dispositif de réception (6) pour le produit en forme de particules ; une autre section tubulaire (5) qui s'y raccorde et à laquelle est associé un dispositif de collage (8, 9) ayant au moins une buse de pulvérisation (10), dispositif caractérisé en ce que la buse de pulvérisation (10) est associée à des éléments d'adduction d'air (12) pour rassembler le voile de particules sur une partie de la section transversale de la section de tube (5) et pour produire une autre partie de la section transversale exempte de produit.
5. Dispositif selon la revendication 4, caractérisé par des éléments de guidage d'air (12) sous la forme d'un corps creux du type conique s'élargissant dans la direction de transport et qui entoure la buse de pulvérisation (10).
6. Dispositif selon la revendication 5, caractérisé en ce que le corps creux du type conique (12) ainsi que la buse de pulvérisation (10) sont disposés dans l'axe de la section du tube (5).
7. Dispositif selon l'une des revendications 4 à 6, caractérisé en ce que la soufflante de transport (2) est constituée par une soufflante à pression moyenne pour une pression d'air de 0,2 à 0,8 bar.
8. Dispositif selon l'une des revendications 4 à 7, caractérisé en ce que plusieurs buses de pulvérisation (10) sont disposées dans la section de tube (5) à une distance minimale d'environ un mètre l'une derrière l'autre.
EP82109799A 1981-11-05 1982-10-23 Procédé d'encollage de fibres, en particulier des copeaux, et appareillage pour la mise en oeuvre de ce procédé Expired EP0078960B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82109799T ATE19606T1 (de) 1981-11-05 1982-10-23 Verfahren und vorrichtung zum beleimen von teilchenfoermigem gut,. insbesondere von spaenen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3143895 1981-11-05
DE3143895A DE3143895C2 (de) 1981-11-05 1981-11-05 Verfahren und Vorrichtung zum Beleimen von teilchenförmigem Gut in Form von Spänen, Fasern o.dgl.

Publications (2)

Publication Number Publication Date
EP0078960A1 EP0078960A1 (fr) 1983-05-18
EP0078960B1 true EP0078960B1 (fr) 1986-05-07

Family

ID=6145658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82109799A Expired EP0078960B1 (fr) 1981-11-05 1982-10-23 Procédé d'encollage de fibres, en particulier des copeaux, et appareillage pour la mise en oeuvre de ce procédé

Country Status (10)

Country Link
US (1) US4510184A (fr)
EP (1) EP0078960B1 (fr)
AT (1) ATE19606T1 (fr)
BE (1) BE894930A (fr)
CA (1) CA1192796A (fr)
DE (1) DE3143895C2 (fr)
DK (1) DK159482C (fr)
ES (1) ES8401335A1 (fr)
FI (1) FI73166C (fr)
FR (1) FR2515535B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122842A1 (de) * 1991-07-10 1993-01-14 Glunz Ag Verfahren zur herstellung von faserplatten aus stueckigen holzpartikeln und isocyanat als bindemittel
DE102006013567A1 (de) * 2006-03-24 2007-09-27 Glunz Ag Verfahren und Vorrichtung zum Aufbringen von Bindemittel auf Partikel, insbesondere Fasern, die durch einen Blasgang gefördert werden
DE102006026124A1 (de) * 2006-06-03 2007-12-06 Glunz Ag Verfahren und Vorrichtung zur Beleimung von Partikeln im Bereich eines Blasrohrs

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3336665A1 (de) * 1983-10-08 1985-04-25 Gebrüder Lödige, Maschinenbaugesellschaft mbH, 4790 Paderborn Verfahren zum befeuchten schuettfaehiger feststoffe und vorrichtung zum durchfuehren dieses verfahrens
US5057166A (en) * 1989-03-20 1991-10-15 Weyerhaeuser Corporation Method of treating discontinuous fibers
US5064689A (en) * 1989-03-20 1991-11-12 Weyerhaeuser Company Method of treating discontinuous fibers
US5230959A (en) * 1989-03-20 1993-07-27 Weyerhaeuser Company Coated fiber product with adhered super absorbent particles
US5432000A (en) * 1989-03-20 1995-07-11 Weyerhaeuser Company Binder coated discontinuous fibers with adhered particulate materials
US5498478A (en) * 1989-03-20 1996-03-12 Weyerhaeuser Company Polyethylene glycol as a binder material for fibers
US5071675A (en) * 1989-03-20 1991-12-10 Weyerhaeuser Company Method of applying liquid sizing of alkyl ketene dimer in ethanol to cellulose fibers entrained in a gas stream
SE502518C2 (sv) * 1991-09-05 1995-11-06 Sunds Defibrator Ind Ab Sätt och anordning för belimning av partiklar
WO1993012282A1 (fr) 1991-12-17 1993-06-24 Weyerhaeuser Company Systeme a cuve/melangeuse et procede de revetement de fibres
DE19506353A1 (de) * 1995-02-23 1996-08-29 Schenck Ag Carl Verfahren und Vorrichtung zum Benetzen mit einem Fluid
IT1274565B (it) * 1995-05-24 1997-07-17 Cmp Spa Incollatrice per impianti di produzione di pannelli in fibra di legno,e impianto utilizzante tale incollatrice
IT1307924B1 (it) * 1999-01-25 2001-11-29 Cmp Spa Apparecchiatura incollatrice per impianti per produrre pannelli infibra di legno.
DE10153593B4 (de) * 2001-11-02 2005-11-17 Fritz Egger Gmbh & Co Vorrichtung und Verfahren zum Benetzen von Holzfasern mit einem Bindemittelfluid
PT1663593E (pt) * 2003-09-12 2007-10-10 Kronospan Tech Co Ltd Aplicação de cola a alta pressão num misturador de fibras

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD78881A (fr) *
US2707690A (en) * 1951-04-10 1955-05-03 Owens Corning Fiberglass Corp Method and apparatus for applying liquid materials to fibers
DE1048013B (de) * 1957-07-26 1958-12-31 Draiswerke Ges Mit Beschraenkt Verfahren und Vorrichtung zur kontinuierlichen Beleimung bzw. Befeuchtung von span- und faserartigen Stoffen
DE1111822B (de) * 1959-03-19 1961-07-27 Paul Lechler Fa Verfahren und Vorrichtung zur Herstellung koerniger oder pulverfoermiger, mit einer das Zusammenkleben verhindernden Schicht bedeckter bituminoeser oder thermoplastischer Massen
DE1200521B (de) * 1964-07-28 1965-09-09 Baehre Metallwerk K G Vorrichtung zum Beleimen von Spaenen
US3481686A (en) * 1965-06-10 1969-12-02 Fiskeby Ab Method for the treating of wood chips
DE1507890A1 (de) * 1965-09-18 1969-04-03 Bayer Ag Verfahren und Vorrichtung zum pneumatischen Mischen,Trocknen oder Befeuchten von pulverfoermigem Gut
AT271861B (de) * 1966-01-05 1969-06-25 Basf Ag Vorrichtung zum Klassieren von Zerkleinerungsprodukten pflanzlicher Rohstoffe
DE1653223A1 (de) * 1966-04-23 1970-09-17 Himmelheber Dipl Ing Max Verfahren und Anlage zur Durchfuehrung der Benetzungsstufe bei der Verarbeitung von Fasermaterial
US3548782A (en) * 1967-11-30 1970-12-22 Hanningsen Foods Inc Means for forming a continuous coating on particles
DE2304262B2 (de) * 1973-01-30 1978-05-03 Wilhelm Loedige Vorrichtung zum Beleimen von Spänen, Fasern oder ähnlichem Mischgut
FR2228604A1 (en) * 1973-05-11 1974-12-06 Cifal Applying resin coating to fibres or particles - by turbulent impact with a high velocity spray
DE2438818A1 (de) * 1974-08-13 1976-02-26 Draiswerke Gmbh Vorrichtung zum kontinuierlichen beleimen von fasern
DE2653683A1 (de) * 1976-11-26 1978-06-01 Draiswerke Gmbh Vorrichtung zum kontinuierlichen beleimen von holzspaenen
DE2711958B2 (de) * 1977-03-18 1981-08-13 Bayer Ag, 5090 Leverkusen Binde- oder Imprägnierungsmittel für lignocellulosehaltige Materialien
DE2913081A1 (de) * 1979-04-02 1980-11-20 Novopan Kg Verfahren und vorrichtung zum beleimen von holzspaenen und anderen lignozellulosehaltigen partikeln

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122842A1 (de) * 1991-07-10 1993-01-14 Glunz Ag Verfahren zur herstellung von faserplatten aus stueckigen holzpartikeln und isocyanat als bindemittel
DE102006013567A1 (de) * 2006-03-24 2007-09-27 Glunz Ag Verfahren und Vorrichtung zum Aufbringen von Bindemittel auf Partikel, insbesondere Fasern, die durch einen Blasgang gefördert werden
DE102006013567B4 (de) * 2006-03-24 2013-09-26 Glunz Ag Verfahren und Vorrichtung zum Aufbringen von Bindemittel auf Partikel, insbesondere Fasern, die durch einen Blasgang gefördert werden
DE102006026124A1 (de) * 2006-06-03 2007-12-06 Glunz Ag Verfahren und Vorrichtung zur Beleimung von Partikeln im Bereich eines Blasrohrs

Also Published As

Publication number Publication date
ES517106A0 (es) 1983-12-16
FR2515535A1 (fr) 1983-05-06
FR2515535B1 (fr) 1986-11-07
FI73166C (fi) 1987-09-10
ES8401335A1 (es) 1983-12-16
DK159482C (da) 1991-04-08
US4510184A (en) 1985-04-09
DE3143895A1 (de) 1983-05-11
FI823760A0 (fi) 1982-11-03
DK159482B (da) 1990-10-22
CA1192796A (fr) 1985-09-03
FI73166B (fi) 1987-05-29
DK490382A (da) 1983-05-06
EP0078960A1 (fr) 1983-05-18
DE3143895C2 (de) 1985-01-17
BE894930A (fr) 1983-03-01
ATE19606T1 (de) 1986-05-15
FI823760L (fi) 1983-05-06

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