EP2714349B1 - Device and method for gluing fibers - Google Patents

Device and method for gluing fibers Download PDF

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Publication number
EP2714349B1
EP2714349B1 EP12724953.0A EP12724953A EP2714349B1 EP 2714349 B1 EP2714349 B1 EP 2714349B1 EP 12724953 A EP12724953 A EP 12724953A EP 2714349 B1 EP2714349 B1 EP 2714349B1
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EP
European Patent Office
Prior art keywords
glue
nozzles
steam
valves
gluing
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
EP12724953.0A
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German (de)
French (fr)
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EP2714349A1 (en
Inventor
Rudolf Christopher Ohlendorf
Günter STAUB
Rolf Trummel
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.)
Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
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Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
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Application filed by Siempelkamp Maschinen und Anlagenbau GmbH and Co KG filed Critical Siempelkamp Maschinen und Anlagenbau GmbH and Co KG
Priority to SI201230782A priority Critical patent/SI2714349T1/en
Priority to PL12724953T priority patent/PL2714349T3/en
Publication of EP2714349A1 publication Critical patent/EP2714349A1/en
Application granted granted Critical
Publication of EP2714349B1 publication Critical patent/EP2714349B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • 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
    • 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
    • B27N1/0227—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer
    • B27N1/0254—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer with means for spraying the agent on the material before it is introduced in the mixer
    • 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
    • B27N1/0263—Mixing the material with binding agent by spraying the agent on the falling material, e.g. with the material sliding along an inclined surface, using rotating elements or nozzles
    • 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

Definitions

  • the invention relates to a device for gluing fibers or the like particles, in particular for the production of wood-based panels, for.
  • B. fiberboard with a blow line (blow-line) through which the fibers to be glued are transported, wherein the blowpipe several opening into the blow pipe nozzles are connected, with which the fibers transported through the blown pipe can be sprayed with glue, wherein the Nozzles as multi-substance nozzles, z.
  • B. two-component nozzles are designed for steam atomization and each nozzle at least one Leimzumoltechnisch and a Dampfzuschreib protest are connected.
  • Wood-based panels means in the context of the invention, in particular fiberboard, such. As MDF plates or HDF plates or LDF plates. In principle, however, chipboard and thus the gluing of chips or the like particles are included. Gluing means the spraying of the fibers with a glue or binder such.
  • a glue or binder such as isocyanates, melamine urea formaldehyde (resins), urea formaldehyde (resins), urea-formaldehyde (resins), melamine resins, phenolic resins or other resins, eg. B. based on polyamines or tannins. In the course of the production of wood-based panels, z. B.
  • fiberboard is a grit mat formed from the glued fibers, which is then pressed in a press using pressure and heat to a wood-based panel or a wood-based panel strand.
  • the press may be a cycle press or a continuous press.
  • the gluing of the fibers is of particular importance in the context of the production of such wood-based panels. Because the properties of the produced wood-based panel, z. B. their transverse tensile strength depend crucially on the amount of glue used. To wood-based panels with sufficient As a rule, a considerable amount of glue is required to produce transverse tensile strength.
  • the gluing takes place in a blow pipe, which is also referred to as a blow-line.
  • the fibers are usually made in a shredder (refiner) from wood chips and the fibers are blown from the refiner into the blow-line.
  • the refiner has a relatively high vapor pressure.
  • This steam also forms a means of transport, with which the fibers are transported through the blowpipe.
  • the fibers are sent to a downstream dryer via the blowing line.
  • blow gluing the fibers are sprayed with glue in the area of the blow line and consequently (immediately) behind the refiner.
  • a device for blow-gluing is z. B. DE 10 2008 059 877 A1 or the DE 10 2009 006 704 A1 known.
  • the EP 2 431 144 A1 describes a method and a device for wet gluing of wood fibers, which were previously frayed in a refiner made of wood shredded into chips, so that they after wet gluing in a Beleimungszone dried in a dryer, then sprinkled in a spreader to a fiber cake and can be pressed in a hot press to a wood-based panel of desired thickness.
  • a plurality of gluing nozzles are arranged in the gluing zone.
  • the gluing of sheet material eg. In the manufacture of multi-ply paper products or the like, using a spray head having a plurality of spray nozzles. In this case, a control of the flow rates taking into account flow measurements.
  • the spray head extends transversely to the working direction and consequently to the transport direction of the web-like material.
  • blow-line gluing has proven itself in principle. However, it is capable of further development. It is a well-proven process, but the amount of glue required is still relatively high. - This is where the invention starts.
  • the invention has for its object to provide a device with which fibers or the like particles can be glued with high quality in an economical manner, so that the glued fibers enable economical production of wood-based panels with high quality.
  • the invention teaches a device for gluing fibers or the like particles, in particular for the production of wood-based panels, with the features of claim 1. It is provided that in each glue supply respectively at least one glue valve and a flow measuring device are integrated and that the glue valves and the flow measuring device are connected to at least one control and / or regulating device, so that with the glue valves the flow rate for each glue feed line and consequently each nozzle can be separately controlled or regulated.
  • the invention is based on the principle known knowledge that with the help of multi-material nozzles, z. As two-component nozzles can produce relatively small glue drops by steam atomization, which are useful for economical gluing.
  • the invention now allows a sensitive adjustment of the spray parameters and thus a sensitive adjustment of the glue drop size, so that the optimal operating point of the nozzle is set by appropriate control or regulation of the flow rates of the individual valves.
  • the invention further proceeds from the recognition that the minimum droplet size does not necessarily lead to the best results, but that in principle there is an "optimal" droplet size, which may depend on a wide variety of properties and parameters.
  • a sensitive adjustment of the gluing parameters to achieve optimum results is now possible. This can be done dynamically on the gluing process and react to the other process parameters.
  • the glue supply to one or more nozzles can be shut off and that with the (remaining) glue valves for the other nozzles specifically a desired flow rate, z. B. a substantially identical or different flow rate is adjustable.
  • the invention is based on the recognition that the refiner and the blow-line usually do not work constantly, but that the material is transported in time in different amounts with different pressure through the blow-line. According to the invention, it is possible to realize the total amount of glue to be used per unit of time by "switching off" one or more nozzles.
  • an optimal control or regulation of the other nozzles succeeds, because with the help of the flow measuring devices and the glue valves can then set optimal conditions for the other nozzles, so that - regardless of the number of active nozzles - is always possible that the other nozzles operate at a certain flow rate. So it may be appropriate that all (active) nozzles are operated at substantially the same flow rate. However, it may also be expedient to set a different glue distribution over the nozzles. For example, the amount of spray may increase or decrease along the transport direction of the fibers. The controllability of the individual nozzles enables a variable adaptation to the conditions and a dynamic optimization of the process.
  • At least six, preferably at least ten, nozzles are preferably connected to the blowing line, which nozzles are distributed along the blowing line and / or over the circumference of the blowing line.
  • the glue supply lines are preferably connected to a common glue distributor, which is supplied with glue, wherein the glue distributor is preferably provided with at least one temperature measuring device, a pressure measuring device and / or a viscosity measuring device.
  • steam valves can be integrated. However, it is not necessary that these individual steam supply lines - like the Leimzumol Kochen - are provided with controllable valves, but in connection with the steam supply, it is usually sufficient to use simple, controllable steam valves, which either release the steam supply line or shut off. Nevertheless, it is also useful on the "steam side" to influence the gluing process by means of suitable control or regulation.
  • the steam supply lines are connected to a common steam distributor, which is acted upon by steam, wherein the steam supply to the steam distributor is controllable or adjustable, for. B. is adjustable to the flow rate or pressure.
  • the steam distributor is preferably connected to a temperature measuring device, a pressure measuring device and / or a flow measuring device. While it is expedient in the glue supply lines, each individual glue supply line to assign its own flow measuring device, it is sufficient in the steam supply in the invention, vorzuordnen the steam manifold a total flow meter. Nevertheless, depending on the number of active nozzles, the amount of steam and / or the pressure can be regulated, so that the glue atomization can be optimized.
  • the control / regulating device of the gluing device is in one integrated superordinate process computer, which controls the plant for the production of wood-based panels, in which the gluing device is integrated.
  • the measuring devices and / or valves, z. As glue valves, steam valves or the like, are therefore particularly preferably connected to the parent process computer, which controls the overall process in terms of a higher-level control technology. Consequently, this higher-level process computer not only records the parameters of the gluing device, but also the other parameters of the press installation, in particular the parameters of the spreading material system for spreading the press material mat and the parameters of the press itself with which the spreading material mats are applied to the wood-based panels using pressure and heat.
  • the solid resin insert can be significantly minimized at a predetermined transverse tensile strength of the plate to be achieved.
  • the invention makes it possible to adapt the parameters of the gluing device sensitively as a function of the other process parameters and in this way to achieve optimum gluing results. The economics of fiber board production is thereby increased significantly.
  • the invention proposes that to the LeimzumolzuZA Maschinentube, z. B. are connected via multi-way valves, water supply, with which the nozzles for the purpose of cleaning or flushing water is supplied.
  • the invention is based on the recognition that it is expedient to vary the number of nozzles to be used, depending on the process parameters.
  • the described water supply is provided.
  • the controller shuts off the gluing via a nozzle by closing the glue valve, water is automatically supplied via the Feed lines, because the water supply lines preferably open behind the control valves in the glue supply lines, wherein the flow of water can be measured with the same flow measuring devices, which are integrated into the Leimzu slaughtertechnischen.
  • the water thus passes through the glue supply line and the nozzle for a given period of time.
  • the control is automatic, preferably also via the higher-level process computer.
  • the invention also relates to a method for gluing fibers or similar particles with a device of the type described.
  • This method is characterized in that the flow rate of the glue to the individual nozzles with the glue valves for each nozzle is controlled or regulated separately.
  • the glue supply to one or more nozzles are interrupted with the glue valves, wherein the flow rate is controlled or regulated to the other nozzles with the glue valves.
  • the glue valves, steam valves, water valves, etc. are preferably controlled by a higher-level process computer.
  • the gluing device or its components are consequently controlled or regulated by a superordinated process computer, which also controls or regulates the blast line and a downstream scattering device and a downstream press line.
  • the invention proposes that the number of active nozzles / Leimzumoltechnische, the flow rate of the glue in the individual lines and / or the flow rate of the steam (total) in response to the operation of the blast line, z. B. depending on the fiber flow rate and / or pressure in the blowpipe, is controlled or regulated.
  • the glue may be expedient to control or regulate the flow rate of the glue as a function of the viscosity of the glue.
  • This is useful, for. B. in the area of the glue dispenser, a viscosity measuring device provided. Since the glue can be composed in the context of the system of different components with different viscosity, it may also be appropriate to adjust the viscosity of the glue in dependence on the other process parameters, so that a dynamic adjustment of the glue properties is possible. It may also be useful to adjust or regulate the glue pressure in dependence on the other parameters. This is z. B. provided in the region of the glue distributor a pressure measuring device. Alternatively or additionally, it is also possible to control or regulate the amount of steam as a function of the viscosity.
  • conventional two-component nozzles or multi-component nozzles can be used, for. B. nozzles, as in the DE 20 2010 005 280 U1 are described.
  • Such a gluing device is consequently integrated in a plant for the production of wood-based panels.
  • the fibers are in a conventional manner in a shredder or refiner 1 of z. B. wood chips produced. From the refiner 1, the fibers are blown with the high vapor pressure existing in the refiner via a fiber feed line 2 into a blow line 3, which is also referred to as a blow line.
  • This blow-line has a relatively small diameter of z. B. 50 mm to 200 mm, preferably 80 mm to 120 mm.
  • the blow-line 3 may be provided on the input side and output side with one or more pressure sensors, which are not shown.
  • To the Blastechnisch 3 a plurality of nozzles 4 are connected, with which the fibers transported through the blown line can be sprayed with glue.
  • nozzles 4 are formed in the embodiment as two-component nozzles for a steam atomization.
  • a Leimzushell Gustav 5 and on the other hand, a steam supply line 6 is connected.
  • ten nozzles 4 are provided (see. Fig. 1a ).
  • Fig. 1b shows Fig. 1b the scheme only for a nozzle.
  • Glue valves 7 and, on the other hand, flow measuring devices 8 are integrated into the glue supply lines 5, in each glue supply line 5 a glue valve 7 and a flow measuring device 8 a common glue distributor 9 connected.
  • the glue valves 7 are individually controllable, taking into account the flow measurements, so that with the help of the glue valves, the flow rate for each Leimzumoltechnisch 5 is separately controlled or regulated.
  • shut-off valves 10 are integrated into each Leimzushelltechnisch z. B. come with replacement of components used.
  • the glue distributor is provided with a temperature measuring device 11 and a pressure gauge 12 and optionally a viscosity measuring device 32. The glue passes from the merely indicated glue preparation 13 via a glue feed 14 on both sides into the glue distributor 9.
  • Steam valves 15 are integrated in the steam supply lines 6, preferably in each steam supply line 6, in each case one steam valve 15. With this steam valve, the individual steam supply lines 15 can be automatically opened or shut off. A single regulation is not provided here. In addition, shut-off valves 16 are also provided for maintenance purposes.
  • the steam supply lines 6 are connected to a common steam distributor 17. This steam distributor 17 is connected to a temperature measuring device 18 and / or a pressure gauge 19. One or more of these measuring devices can form a control circuit 21 together with a steam supply valve 20 upstream of the steam distributor, so that the flow rate or the pressure can be regulated. For this purpose, a flow meter 22 is arranged upstream of the steam distributor. The steam feed 23 is indicated.
  • each a water supply line 24 opens, wherein the water supply lines are connected to a common water distributor 25.
  • controllable or controllable valves 26 and also shut-off valves 27 are integrated.
  • Fig. 2 shows in particular the blow pipe or blow-line with the indicated supply of wood fibers.
  • nozzles connected to the blow pipe recognizable, in the exemplary embodiment ten nozzles, which are placed as it were V-shaped one behind the other on the blow pipe.
  • Glue distributors, steam distributors and water distributors are in Fig. 1 also recognizable.
  • Fig. 3 shows in two different views in particular the glue distribution.
  • Fig. 4 shows in two different views in particular the water distribution.
  • the illustrated gluing device is integrated in a higher-level process computer 31. This means that the control or regulation of the gluing device takes place with a higher-level process computer, which also controls the other components of the fiberboard plant, eg. B controls the blowing line, the spreading device and the pressing device.
  • This calculator 31 is in Fig. 1b merely hinted.
  • the gluing process can be adapted dynamically to the other process parameters.
  • the gluing can be sensitively adapted to the operation of the refiner or the blow-line. It exists for example the Possibility to deactivate individual glue supply lines and thus also glue nozzles for the variation of the amount of gluing, so that the spraying then takes place with a few nozzles.
  • About the described flow measuring devices and control valves 7 of the gluing device can for the remaining, active nozzles z. B. a substantially identical flow rate or another flow rate distribution can be set. Consequently, the gluing process can first of all be influenced by sensitive influencing of the flow rate per nozzle via the control valves 7.
  • the glue pressure can be changed and in particular evaluated. Decisive is usually the differential pressure to the blow-line.
  • a sensitive adjustment can be made via the steam control.
  • the individual steam supply lines 6 are opened or closed via the steam valves 15 as a function of the number of active glue nozzles. An individual control of the steam supply lines 6 is not required. However, it is expedient to regulate the total steam supply via the illustrated control circuit 21.
  • the gluing can be significantly optimized, so that can be produced in such a plant fiberboard with the required transverse tensile strength at significantly reduced use of glue.
  • the system is also easy to maintain, z. B. by the intended possibility of water flushing.
  • the water rinse automatically sets individual nozzles for individual nozzles 4 during breaks in operation. This is also from the Control, z. As the parent control guaranteed. In this way, it is possible to perform the glue variably with a different number of nozzles, without the risk that the temporarily deactivated nozzles become clogged with glue.
  • the compressed air supply for the nozzles or valves is shown in the figures.
  • a compressed air distributor 28 is provided which operates via compressed air lines 29 to the nozzle needles of the nozzles, not shown, in order to open and close them.
  • the individual valve controls can be connected to the compressed air distributor 28.
  • FIG. 1 another supply line 30 indicated for a hardener.
  • the wood fibers are blown through the blowpipe 3 and supported by steam nozzles 4 with supplies such.
  • glue sprayed.
  • the nozzles 4 are subjected to glue or water depending on the process conditions.
  • the supply of glue or water is regulated by valves.
  • the water is used to rinse the nozzles.
  • Water, steam and glue are fed to the nozzles via distributors.
  • the hardener is fed to the last nozzle of the blowpipe directly via the hardener feed line 30.
  • Fig. 3 is again indicated that the glue is supplied via the manifold to the individual nozzles.
  • the hardener is fed via a separate connection to the last nozzle.
  • the connection is attached to the manifold of the glue distribution.
  • the valves regulate the inflow as explained.
  • the flow meter reports the flow to the controller.
  • the indicated check valve prevents backflow.
  • Shut-off valves are used to replace components.
  • Fig. 4 which relates in particular to the water distributor.
  • the water is used for rinsing and is supplied via the manifold to the individual nozzles. During production interruptions, all nozzles are automatically rinsed. During production only disconnected nozzles are rinsed. Again, valves control the inflow. The flow meter reports the flow to the controller. The check valve also prevents the backflow. Shut-off valves are used to replace components.

Description

Die Erfindung betrifft eine Vorrichtung zum Beleimen von Fasern oder dergleichen Partikeln, insbesondere für die Herstellung von Holzwerkstoffplatten, z. B. Faserplatten, mit einer Blasleitung (Blow-Line), durch welche die zu beleimenden Fasern transportiert werden, wobei an die Blasleitung mehrere in die Blasleitung mündende Düsen angeschlossen sind, mit denen die durch die Blasleitung transportierten Fasern mit Leim besprühbar sind, wobei die Düsen als Mehrstoff-Düsen, z. B. Zweistoff-Düsen für eine Dampfzerstäubung ausgebildet sind und an jede Düse jeweils zumindest eine Leimzuführleitung und eine Dampfzuführleitung angeschlossen sind.The invention relates to a device for gluing fibers or the like particles, in particular for the production of wood-based panels, for. B. fiberboard, with a blow line (blow-line) through which the fibers to be glued are transported, wherein the blowpipe several opening into the blow pipe nozzles are connected, with which the fibers transported through the blown pipe can be sprayed with glue, wherein the Nozzles as multi-substance nozzles, z. B. two-component nozzles are designed for steam atomization and each nozzle at least one Leimzuführleitung and a Dampfzuführleitung are connected.

Holzwerkstoffplatten meint im Rahmen der Erfindung insbesondere Faserplatten, wie z. B. MDF-Platten oder HDF-Platten oder auch LDF-Platten. Grundsätzlich werden aber auch Spanplatten und folglich die Beleimung von Spänen oder dergleichen Partikeln umfasst. Beleimen meint das Besprühen der Fasern mit einem Leim bzw. Bindemittel wie z. B. Isocyanate, Melaminharnstoffformaldehyd(harze), Harnstoffformaldehyd(harze), Urea-Formaldehyd(harze), Melaminharze, Phenolharze oder andere Harze, z. B. auf Basis von Polyaminen oder Taninen. Im Zuge der Herstellung von Holzwerkstoffplatten, z. B. Faserplatten wird aus den beleimten Fasern eine Streugutmatte gebildet, welche dann in einer Presse unter Anwendung von Druck und Wärme zu einer Holzwerkstoffplatte bzw. einem Holzwerkstoffplattenstrang verpresst wird. Bei der Presse kann es sich um eine Taktpresse oder eine kontinuierlich arbeitende Presse handeln. Der Beleimung der Fasern kommt im Rahmen der Herstellung solcher Holzwerkstoffplatten besondere Bedeutung zu. Denn die Eigenschaften der hergestellten Holzwerkstoffplatte, z. B. deren Querzugfestigkeit, hängen entscheidend von der eingesetzten Leimmenge ab. Um Holzwerkstoffplatten mit ausreichender Querzugfestigkeit herzustellen, ist daher in der Regel ein erheblicher Leimeinsatz erforderlich.Wood-based panels means in the context of the invention, in particular fiberboard, such. As MDF plates or HDF plates or LDF plates. In principle, however, chipboard and thus the gluing of chips or the like particles are included. Gluing means the spraying of the fibers with a glue or binder such. As isocyanates, melamine urea formaldehyde (resins), urea formaldehyde (resins), urea-formaldehyde (resins), melamine resins, phenolic resins or other resins, eg. B. based on polyamines or tannins. In the course of the production of wood-based panels, z. B. fiberboard is a grit mat formed from the glued fibers, which is then pressed in a press using pressure and heat to a wood-based panel or a wood-based panel strand. The press may be a cycle press or a continuous press. The gluing of the fibers is of particular importance in the context of the production of such wood-based panels. Because the properties of the produced wood-based panel, z. B. their transverse tensile strength depend crucially on the amount of glue used. To wood-based panels with sufficient As a rule, a considerable amount of glue is required to produce transverse tensile strength.

Im Rahmen der Erfindung erfolgt die Beleimung in einer Blasleitung, die auch als Blow-Line bezeichnet wird. Bei dieser Technik werden die Fasern in der Regel in einem Zerfaserer (Refiner) aus Hackschnitzeln hergestellt und die Fasern werden aus dem Refiner in die Blow-Line geblasen. Im Refiner befindet sich ein verhältnismäßig hoher Dampfdruck. Dieser Dampf bildet zugleich ein Transportmittel, mit welchem die Fasern durch die Blasleitung transportiert werden. Über die Blasleitung gelangen die Fasern zu einem nachgeschalteten Trockner. Bei der Blow-Beleimung erfolgt das Besprühen der Fasern mit Leim im Bereich der Blow-Line und folglich (unmittelbar) hinter dem Refiner.In the context of the invention, the gluing takes place in a blow pipe, which is also referred to as a blow-line. In this technique, the fibers are usually made in a shredder (refiner) from wood chips and the fibers are blown from the refiner into the blow-line. The refiner has a relatively high vapor pressure. This steam also forms a means of transport, with which the fibers are transported through the blowpipe. The fibers are sent to a downstream dryer via the blowing line. In blow gluing, the fibers are sprayed with glue in the area of the blow line and consequently (immediately) behind the refiner.

Eine Vorrichtung zur Blow-Beleimung ist z. B. DE 10 2008 059 877 A1 oder der DE 10 2009 006 704 A1 bekannt.A device for blow-gluing is z. B. DE 10 2008 059 877 A1 or the DE 10 2009 006 704 A1 known.

Es ist grundsätzlich bekannt, dass das Eindüsen des Leims in die Blow-Line erheblichen Einfluss auf die Beleimungsqualität hat. So ist man in der Praxis grundsätzlich bestrebt, eine möglichst feine Verdüsung des Leims zu erreichen, um verhältnismäßig kleine Leimtropfen zu realisieren. Damit sollen Verklumpungen der Fasern vermieden und insbesondere eine Leimersparnis erzielt werden. Aus diesem Grunde wurde bereits vorgeschlagen, den Leim nicht mittels einfacher Druckluft sondern mit Dampf zu zerstäuben. Zu diesem Zweck werden Zweistoff-Düsen eingesetzt. Derartige Zweistoff-Düsen sind beispielsweise aus der DE 20 2010 005 280 U1 bekannt.It is generally known that the injection of the glue into the blow-line has a considerable influence on the gluing quality. Thus, in practice, one endeavors in principle to achieve the finest possible atomization of the glue in order to realize relatively small glue drops. This should avoid clumping of the fibers and in particular a glue saving can be achieved. For this reason, it has already been proposed not to atomize the glue by means of simple compressed air but with steam. Dual-fluid nozzles are used for this purpose. Such dual-fluid nozzles are for example from the DE 20 2010 005 280 U1 known.

Die EP 2 431 144 A1 beschreibt ein Verfahren und eine Einrichtung zur Nassbeleimung von Holzfasern, die zuvor in einem Refiner aus zu Schnitzeln zerkleinertem Holz zerfasert wurden, damit diese nach der Nassbeleimung in einer Beleimungszone in einem Trockner getrocknet, anschließend in einer Streuvorrichtung zu einem Faserkuchen gestreut und in einer Heißpresse zu einer Holzwerkstoffplatte gewünschter Dicke verpresst werden können. In der Beleimungszone sind eine Mehrzahl von Beleimungsdüsen angeordnet.The EP 2 431 144 A1 describes a method and a device for wet gluing of wood fibers, which were previously frayed in a refiner made of wood shredded into chips, so that they after wet gluing in a Beleimungszone dried in a dryer, then sprinkled in a spreader to a fiber cake and can be pressed in a hot press to a wood-based panel of desired thickness. In the gluing zone, a plurality of gluing nozzles are arranged.

Ferner kennt man aus der US 2008/0271850 A1 ein Verfahren und eine Vorrichtung zum Beleimen von Holzfasern mit einer Vielzahl von Beleimungsdüsen, gemäß dem Oberbegriff des Anspruchs 1. In dieser Vorrichtung ist in eine Leimzuführung eine Durchflussmessvorrichtung integriert und wobei der Leim über eine Verteileinrichtung auf die verschiedenen Düsen verteilt wird.Furthermore, one knows from the US 2008/0271850 A1 a method and a device for gluing wood fibers with a plurality of gluing nozzles, according to the preamble of claim 1. In this device, a flow meter is integrated in a glue feed and wherein the glue is distributed to the various nozzles via a distributor.

Im Übrigen wird in der US 2010/209592 die Beleimung von flächigem Material, z. B. bei der Herstellung von mehrlagigen Papierprodukten oder dergleichen beschrieben, wobei ein Sprühkopf mit einer Vielzahl von Sprühdüsen zum Einsatz kommt. Dabei erfolgt eine Steuerung der Durchflussmengen unter Berücksichtigung von Durchflussmessungen. Der Sprühkopf erstreckt sich dabei quer zur Arbeitsrichtung und folglich zur Transportrichtung des bahnförmigen Materials.Incidentally, in the US 2010/209592 the gluing of sheet material, eg. In the manufacture of multi-ply paper products or the like, using a spray head having a plurality of spray nozzles. In this case, a control of the flow rates taking into account flow measurements. The spray head extends transversely to the working direction and consequently to the transport direction of the web-like material.

Die Blow-Line-Beleimung hat sich grundsätzlich bewährt. Sie ist jedoch weiterentwicklungsfähig. Es handelt sich um ein seit langem gut erprobtes Verfahren, der erforderliche Leimeinsatz ist jedoch nach wie vor verhältnismäßig hoch. - Hier setzt die Erfindung ein.The blow-line gluing has proven itself in principle. However, it is capable of further development. It is a well-proven process, but the amount of glue required is still relatively high. - This is where the invention starts.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zu schaffen, mit der sich Fasern oder dergleichen Partikeln mit hoher Qualität in wirtschaftlicher Weise beleimen lassen, so dass die beleimten Fasern eine wirtschaftliche Herstellung von Holzwerkstoffplatten mit hoher Qualität ermöglichen.The invention has for its object to provide a device with which fibers or the like particles can be glued with high quality in an economical manner, so that the glued fibers enable economical production of wood-based panels with high quality.

Zur Lösung dieser Aufgabe lehrt die Erfindung eine Vorrichtung zum Beleimen von Fasern oder dergleichen Partikeln, insbesondere für die Herstellung von Holzwerkstoffplatten, mit den Merkmalen des Anspruchs 1. Dabei ist vorgesehen, dass in jede Leimzuführleitung jeweils zumindest ein Leimventil und eine Durchflussmessvorrichtung integriert sind und dass die Leimventile und die Durchflussmessvorrichtung mit zumindest einer Steuer- und/oder Regelvorrichtung verbunden sind, so dass mit den Leimventilen die Durchflussmenge für jede Leimzuführleitung und folglich jede Düse separat steuerbar oder regelbar ist.To solve this problem, the invention teaches a device for gluing fibers or the like particles, in particular for the production of wood-based panels, with the features of claim 1. It is provided that in each glue supply respectively at least one glue valve and a flow measuring device are integrated and that the glue valves and the flow measuring device are connected to at least one control and / or regulating device, so that with the glue valves the flow rate for each glue feed line and consequently each nozzle can be separately controlled or regulated.

Die Erfindung geht dabei von der grundsätzlich bekannten Erkenntnis aus, dass sich mit Hilfe von Mehrstoff-Düsen, z. B. Zweistoff-Düsen durch eine Dampfzerstäubung verhältnismäßig kleine Leimtropfen erzeugen lassen, welche für eine wirtschaftliche Beleimung zweckmäßig sind. Die Erfindung erlaubt nun eine empfindliche Einstellung der Sprühparameter und damit eine empfindliche Einstellung der Leimtropfengröße, so dass durch entsprechende Steuerung oder Regelung der Durchflussmengen der einzelnen Ventile der jeweils optimale Betriebspunkt der Düse eingestellt wird. Dabei geht die Erfindung ferner von der Erkenntnis aus, dass nicht zwingend die minimale Tröpfchengröße zu den besten Ergebnissen führt, sondern dass es grundsätzlich eine "optimale" Tröpfchengröße gibt, die von verschiedensten Eigenschaften und Parametern abhängen kann. Im Rahmen der Erfindung gelingt nun eine empfindliche Einstellung der Beleimungsparameter zur Erzielung optimaler Ergebnisse. Dazu kann dynamisch auf den Beleimungsprozess eingewirkt und auf die übrigen Prozessparameter reagiert werden.The invention is based on the principle known knowledge that with the help of multi-material nozzles, z. As two-component nozzles can produce relatively small glue drops by steam atomization, which are useful for economical gluing. The invention now allows a sensitive adjustment of the spray parameters and thus a sensitive adjustment of the glue drop size, so that the optimal operating point of the nozzle is set by appropriate control or regulation of the flow rates of the individual valves. The invention further proceeds from the recognition that the minimum droplet size does not necessarily lead to the best results, but that in principle there is an "optimal" droplet size, which may depend on a wide variety of properties and parameters. Within the scope of the invention, a sensitive adjustment of the gluing parameters to achieve optimum results is now possible. This can be done dynamically on the gluing process and react to the other process parameters.

So liegt es im Rahmen der Erfindung, dass mit den Leimventilen die Leimzufuhr zu einer oder mehreren Düsen absperrbar ist und dass mit den (übrigen) Leimventilen für die übrigen Düsen jeweils gezielt eine gewünschte Durchflussmenge, z. B. eine im Wesentlichen identische oder auch unterschiedliche Durchflussmenge einstellbar ist. Die Erfindung geht dabei von der Erkenntnis aus, dass der Refiner und die Blow-Line in der Regel nicht konstant arbeiten, sondern dass das Material zeitlich in unterschiedlicher Menge mit unterschiedlichen Druck durch die Blow-Line transportiert wird. Erfindungsgemäß besteht die Möglichkeit, die Gesamtmenge des einzusetzenden Leims pro Zeiteinheit durch "Abschalten" einzelner oder mehrerer Düsen zu realisieren. Dabei gelingt zugleich eine optimale Steuerung bzw. Regelung der übrigen Düsen, denn mit Hilfe der Durchflussmessvorrichtungen und der Leimventile lassen sich dann für die übrigen Düsen optimale Bedingungen einstellen, so dass es - unabhängig von der Zahl der aktiven Düsen - stets möglich ist, dass die übrigen Düsen mit einer bestimmten Durchflussmenge arbeiten. So kann es zweckmäßig sein, dass alle (aktiven) Düsen mit im Wesentlichen derselben Durchflussmenge betrieben werden. Ebenso kann es aber auch zweckmäßig sein, eine andere Leimverteilung über die Düsen einzustellen. So kann die Sprühmenge beispielsweise entlang der Transportrichtung der Fasern zunehmen oder abnehmen. Die Regelbarkeit der einzelnen Düsen ermöglicht eine variable Anpassung an die Gegebenheiten und eine dynamische Optimierung des Prozesses.
An die Blasleitung sind dabei vorzugsweise zumindest sechs, bevorzugt zumindest zehn Düsen angeschlossen, welche entlang der Blasleitung und/oder über den Umfang der Blasleitung verteilt sind. Grundsätzlich kann es im Rahmen der Erfindung zweckmäßig sein, mit sehr vielen Düsen zu arbeiten, da die Zahl der aktiven Düsen frei wählbar ist und da insbesondere gewährleistet ist, dass für sämtliche Düsen eine identische Sprühmenge einstellbar ist.So it is within the scope of the invention that with the glue valves, the glue supply to one or more nozzles can be shut off and that with the (remaining) glue valves for the other nozzles specifically a desired flow rate, z. B. a substantially identical or different flow rate is adjustable. The invention is based on the recognition that the refiner and the blow-line usually do not work constantly, but that the material is transported in time in different amounts with different pressure through the blow-line. According to the invention, it is possible to realize the total amount of glue to be used per unit of time by "switching off" one or more nozzles. At the same time an optimal control or regulation of the other nozzles succeeds, because with the help of the flow measuring devices and the glue valves can then set optimal conditions for the other nozzles, so that - regardless of the number of active nozzles - is always possible that the other nozzles operate at a certain flow rate. So it may be appropriate that all (active) nozzles are operated at substantially the same flow rate. However, it may also be expedient to set a different glue distribution over the nozzles. For example, the amount of spray may increase or decrease along the transport direction of the fibers. The controllability of the individual nozzles enables a variable adaptation to the conditions and a dynamic optimization of the process.
At least six, preferably at least ten, nozzles are preferably connected to the blowing line, which nozzles are distributed along the blowing line and / or over the circumference of the blowing line. In principle, it may be expedient in the context of the invention to work with a large number of nozzles, since the number of active nozzles is freely selectable and since it is ensured in particular that an identical spray quantity can be set for all nozzles.

Die Leimzuführleitungen sind vorzugsweise an einem gemeinsamen Leimverteiler angeschlossen, welcher mit Leim beaufschlagt ist, wobei der Leimverteiler vorzugsweise mit zumindest einer Temperaturmesseinrichtung, einer Druckmesseinrichtung und/oder einer Viskositätsmesseinrichtung versehen ist.The glue supply lines are preferably connected to a common glue distributor, which is supplied with glue, wherein the glue distributor is preferably provided with at least one temperature measuring device, a pressure measuring device and / or a viscosity measuring device.

Auch in die Dampfzuführleitungen können Dampfventile integriert sein. Dabei ist es jedoch nicht erforderlich, dass diese einzelnen Dampfzuführleitungen - wie die Leimzuführleitungen - mit regelbaren Ventilen versehen sind, sondern im Zusammenhang mit der Dampfzuführung ist es in der Regel ausreichend, einfache, steuerbare Dampfventile zu verwenden, welche die Dampfzuführleitung entweder freigeben oder absperren. Dennoch ist es auch auf der "Dampfseite" zweckmäßig, durch geeignete Steuerung oder Regelung auf den Beleimungsprozess einzuwirken. Dazu sind die Dampfzuführungsleitungen an einen gemeinsamen Dampfverteiler angeschlossen, welcher mit Dampf beaufschlagt ist, wobei die Dampfzufuhr zu dem Dampfverteiler steuerbar oder regelbar ist, z. B. auf die Durchflussmenge oder dem Druck regelbar ist. Dazu ist der Dampfverteiler vorzugsweise mit einer Temperaturmessvorrichtung, einer Druckmessvorrichtung und/oder einer Durchflussmessvorrichtung verbunden. Während es bei den Leimzufuhrleitungen zweckmäßig ist, jeder einzelnen Leimzufuhrleitung eine eigene Durchflussmessvorrichtung zuzuordnen, ist es bei der Dampfzuführung im Rahmen der Erfindung ausreichend, dem Dampfverteiler insgesamt eine Durchflussmessvorrichtung vorzuordnen. Dennoch lässt sich - in Abhängigkeit von der Anzahl der aktiven Düsen - die Dampfmenge und/oder der Druck regeln, so dass die Leimzerstäubung optimiert werden kann.Also in the steam supply lines steam valves can be integrated. However, it is not necessary that these individual steam supply lines - like the Leimzuführleitungen - are provided with controllable valves, but in connection with the steam supply, it is usually sufficient to use simple, controllable steam valves, which either release the steam supply line or shut off. Nevertheless, it is also useful on the "steam side" to influence the gluing process by means of suitable control or regulation. For this purpose, the steam supply lines are connected to a common steam distributor, which is acted upon by steam, wherein the steam supply to the steam distributor is controllable or adjustable, for. B. is adjustable to the flow rate or pressure. For this purpose, the steam distributor is preferably connected to a temperature measuring device, a pressure measuring device and / or a flow measuring device. While it is expedient in the glue supply lines, each individual glue supply line to assign its own flow measuring device, it is sufficient in the steam supply in the invention, vorzuordnen the steam manifold a total flow meter. Nevertheless, depending on the number of active nozzles, the amount of steam and / or the pressure can be regulated, so that the glue atomization can be optimized.

Nach einem weiteren Vorschlag der Erfindung, dem besondere Bedeutung zukommt, ist die Steuer/Regelvorrichtung der Beleimungsvorrichtung in einen übergeordneten Prozessrechner integriert, welcher die Anlage zur Herstellung von Holzwerkstoffplatten steuert, in welche die Beleimungsvorrichtung integriert ist. Die Messvorrichtungen und/oder Ventile, z. B. Leimventile, Dampfventile oder dergleichen, sind folglich besonders bevorzugt mit dem übergeordneten Prozessrechner verbunden, welcher im Sinne einer übergeordneten Leittechnik den Gesamtprozess steuert. Dieser übergeordnete Prozessrechner erfasst folglich nicht nur die Parameter der Beleimungsvorrichtung, sondern auch die übrigen Parameter der Pressenanlage, insbesondere die Parameter der Streugutanlage zum Streuen der Pressgutmatte und die Parameter der Presse selbst, mit welcher die Streugutmatten unter Anwendung von Druck und Wärme zu den Holzwerkstoffplatten, z. B. Faserplatten verpresst werden.According to a further proposal of the invention, which is of particular importance, the control / regulating device of the gluing device is in one integrated superordinate process computer, which controls the plant for the production of wood-based panels, in which the gluing device is integrated. The measuring devices and / or valves, z. As glue valves, steam valves or the like, are therefore particularly preferably connected to the parent process computer, which controls the overall process in terms of a higher-level control technology. Consequently, this higher-level process computer not only records the parameters of the gluing device, but also the other parameters of the press installation, in particular the parameters of the spreading material system for spreading the press material mat and the parameters of the press itself with which the spreading material mats are applied to the wood-based panels using pressure and heat. z. B. pressed fiberboard.

Versuche haben gezeigt, dass sich mit der erfindungsgemäßen Vorrichtung der Festharzeinsatz bei einer zu erreichenden vorgegebenen Querzugfestigkeit der herzustellenden Platte deutlich minimieren lässt. Die Erfindung ermöglicht es, die Parameter der Beleimungsvorrichtung empfindlich in Abhängigkeit von den übrigen Prozessparametern anzupassen und auf diese Weise optimale Beleimungsergebnisse zu erzielen. Die Wirtschaftlichkeit der Faserplattenherstellung wird dadurch in wesentlichem Maße erhöht.Experiments have shown that with the device according to the invention the solid resin insert can be significantly minimized at a predetermined transverse tensile strength of the plate to be achieved. The invention makes it possible to adapt the parameters of the gluing device sensitively as a function of the other process parameters and in this way to achieve optimum gluing results. The economics of fiber board production is thereby increased significantly.

In weiterer bevorzugter Ausführungsform schlägt die Erfindung vor, dass an die Leimzuführleitungen, z. B. über Mehrwegeventile, Wasserzuführleitungen angeschlossen sind, mit denen den Düsen zum Zwecke der Reinigung bzw. Spülung Wasser zuführbar ist. Dabei geht die Erfindung von der Erkenntnis aus, dass es zweckmäßig ist, in Abhängigkeit von dem Prozessparametern die Zahl der einzusetzenden Düsen zu variieren. Um zu verhindern, dass sich eine inaktive Düse mit Leim zusetzt, ist die beschriebene Wasserzuführung vorgesehen. Sobald die Steuerung die Beleimung über eine Düse durch Schließen des Leimventils abschaltet, erfolgt automatisch die Zuführung von Wasser über die Zuführleitungen, denn die Wasserzuführleitungen münden vorzugsweise hinter den Regelventilen in die Leimzuführungsleitungen, wobei der Durchfluss des Wassers mit denselben Durchflussmessvorrichtungen gemessen werden kann, welche in die Leimzuführleitungen integriert sind. Das Wasser durchläuft folglich die Leimzuführleitung und die Düse für einen vorgegebenen Zeitraum. Die Steuerung erfolgt automatisch, bevorzugt ebenfalls über den übergeordneten Prozessrechner.In a further preferred embodiment, the invention proposes that to the Leimzuführleitungen, z. B. are connected via multi-way valves, water supply, with which the nozzles for the purpose of cleaning or flushing water is supplied. The invention is based on the recognition that it is expedient to vary the number of nozzles to be used, depending on the process parameters. In order to prevent an inactive nozzle from being contaminated with glue, the described water supply is provided. As soon as the controller shuts off the gluing via a nozzle by closing the glue valve, water is automatically supplied via the Feed lines, because the water supply lines preferably open behind the control valves in the glue supply lines, wherein the flow of water can be measured with the same flow measuring devices, which are integrated into the Leimzuführleitungen. The water thus passes through the glue supply line and the nozzle for a given period of time. The control is automatic, preferably also via the higher-level process computer.

Gegenstand der Erfindung ist auch ein Verfahren zum Beleimen von Fasern oder dergleichen Partikeln mit einer Vorrichtung der beschriebenen Art. Dieses Verfahren ist dadurch gekennzeichnet, dass die Durchflussmenge des Leims zu den einzelnen Düsen mit den Leimventilen für jede Düse separat gesteuert oder geregelt wird. Dazu kann bei Bedarf die Leimzufuhr zu einer oder mehreren Düsen mit dem Leimventilen unterbrochen werden, wobei die Durchflussmenge zu den übrigen Düsen mit den Leimventilen gesteuert oder geregelt wird. Die Leimventile, Dampfventile, Wasserventile usw. werden dabei vorzugsweise von einem übergeordneten Prozessrechner gesteuert. Die Beleimungsvorrichtung bzw. deren Komponenten werden folglich von einem übergeordneten Prozessrechner gesteuert oder geregelt, welcher auch die Blasleitung und eine nachgeordnete Streuvorrichtung und eine nachgeordnete Pressenanlage steuert oder regelt. Dabei schlägt die Erfindung vor, dass die Anzahl der aktiven Düsen/Leimzuführleitungen, die Durchflussmenge des Leims in den einzelnen Leitungen und/oder die Durchflussmenge des Dampfes (insgesamt) in Abhängigkeit von dem Betrieb der Blasleitung, z. B. in Abhängigkeit von dem Faserdurchsatz und/oder Druck in der Blasleitung, gesteuert oder geregelt wird.The invention also relates to a method for gluing fibers or similar particles with a device of the type described. This method is characterized in that the flow rate of the glue to the individual nozzles with the glue valves for each nozzle is controlled or regulated separately. For this purpose, if necessary, the glue supply to one or more nozzles are interrupted with the glue valves, wherein the flow rate is controlled or regulated to the other nozzles with the glue valves. The glue valves, steam valves, water valves, etc. are preferably controlled by a higher-level process computer. The gluing device or its components are consequently controlled or regulated by a superordinated process computer, which also controls or regulates the blast line and a downstream scattering device and a downstream press line. In this case, the invention proposes that the number of active nozzles / Leimzuführleitungen, the flow rate of the glue in the individual lines and / or the flow rate of the steam (total) in response to the operation of the blast line, z. B. depending on the fiber flow rate and / or pressure in the blowpipe, is controlled or regulated.

Ferner kann es zweckmäßig sein, die Durchflussmenge des Leims in Abhängigkeit von der Viskosität des Leims zu steuern oder zu regeln. Dazu ist es zweckmäßig, z. B. im Bereich des Leimverteilers, eine Viskositätsmessvorrichtung vorzusehen. Da der Leim im Rahmen der Anlage aus verschiedenen Komponenten mit unterschiedlicher Viskosität zusammengesetzt werden kann, kann es ebenfalls zweckmäßig sein, die Viskosität des Leims in Abhängigkeit von den übrigen Prozessparametern anzupassen, so dass eine dynamische Anpassung der Leimeigenschaften möglich ist. Dabei kann es ferner zweckmäßig sein, den Leimdruck in Abhängigkeit von den übrigen Parametern einzustellen bzw. zu regeln. Dazu ist z. B. im Bereich des Leimverteilers eine Druckmessvorrichtung vorgesehen. Alternativ oder ergänzend besteht die Möglichkeit, auch die Dampfmenge in Abhängigkeit von der Viskosität zu steuern oder zu regeln.Furthermore, it may be expedient to control or regulate the flow rate of the glue as a function of the viscosity of the glue. This is useful, for. B. in the area of the glue dispenser, a viscosity measuring device provided. Since the glue can be composed in the context of the system of different components with different viscosity, it may also be appropriate to adjust the viscosity of the glue in dependence on the other process parameters, so that a dynamic adjustment of the glue properties is possible. It may also be useful to adjust or regulate the glue pressure in dependence on the other parameters. This is z. B. provided in the region of the glue distributor a pressure measuring device. Alternatively or additionally, it is also possible to control or regulate the amount of steam as a function of the viscosity.

Im Rahmen der Erfindung können übliche Zweistoff-Düsen oder auch Mehrstoff-Düsen zum Einsatz kommen, z. B. Düsen, wie sie in der DE 20 2010 005 280 U1 beschrieben sind.In the context of the invention, conventional two-component nozzles or multi-component nozzles can be used, for. B. nozzles, as in the DE 20 2010 005 280 U1 are described.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen

  • Fig. 1a ein Beleimungsvorrichtung in einer vereinfachten, schematischen Darstellung,
  • Fig. 1b die Vorrichtung nach Fig. 1 in weiterer Vereinfachung mit lediglich einer dargestellten Düse,
  • Fig. 2 einen Ausschnitt aus einer Beleimungsvorrichtung in einer Seitenansicht,
  • Fig. 3 einen Ausschnitt aus dem Gegenstand nach Fig. 2 in zwei verschiedenen Ansichten und
  • Fig. 4 einen anderen Ausschnitt aus dem Gegenstand nach Fig. 2 in zwei verschiedenen Ansichten.
In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment. Show it
  • Fig. 1a a gluing device in a simplified, schematic representation,
  • Fig. 1b the device after Fig. 1 in a further simplification with only one illustrated nozzle,
  • Fig. 2 a detail of a gluing device in a side view,
  • Fig. 3 a section of the object after Fig. 2 in two different views and
  • Fig. 4 another section of the object after Fig. 2 in two different views.

In den Figuren ist eine Vorrichtung zum Beleimen von Fasern oder dergleichen Partikeln für die Herstellung von Holzwerkstoffplatten, z. B. Faserplatten dargestellt. Eine solche Beleimungsvorrichtung ist folglich in einer Anlage zur Herstellung von Holzwerkstoffplatten integriert.In the figures, an apparatus for gluing fibers or the like particles for the production of wood-based panels, for. B. fiberboard. Such a gluing device is consequently integrated in a plant for the production of wood-based panels.

Die Fasern werden in an sich bekannter Weise in einem Zerfaserer bzw. Refiner 1 aus z. B. Hackschnitzeln hergestellt. Aus dem Refiner 1 werden die Fasern mit dem im Refiner bestehenden hohen Dampfdruck über eine Faserzuführleitung 2 in eine Blasleitung 3 eingeblasen, die auch als Blow-Line bezeichnet wird. Diese Blow-Line hat einen verhältnismäßig geringen Durchmesser von z. B. 50 mm bis 200 mm, vorzugsweise 80 mm bis 120 mm. Die Blow-Line 3 kann eingangsseitig und ausgangsseitig mit einem oder mehreren Drucksensoren versehen sein, die nicht dargestellt sind. An die Blasleitung 3 sind eine Vielzahl von Düsen 4 angeschlossen, mit denen die durch die Blasleitung transportierten Fasern mit Leim besprühbar sind. Diese Düsen 4 sind im Ausführungsbeispiels als Zweistoff-Düsen für eine Dampfzerstäubung ausgebildet. An jede Düse ist dazu einerseits eine Leimzuführleitung 5 und andererseits eine Dampfzuführleitung 6 angeschlossen. Im Ausführungsbeispiel sind zehn Düsen 4 vorgesehen (vgl. Fig. 1a). Aus Gründen der Übersichtlichkeit zeigt Fig. 1b das Schema lediglich für eine Düse.The fibers are in a conventional manner in a shredder or refiner 1 of z. B. wood chips produced. From the refiner 1, the fibers are blown with the high vapor pressure existing in the refiner via a fiber feed line 2 into a blow line 3, which is also referred to as a blow line. This blow-line has a relatively small diameter of z. B. 50 mm to 200 mm, preferably 80 mm to 120 mm. The blow-line 3 may be provided on the input side and output side with one or more pressure sensors, which are not shown. To the Blasleitung 3 a plurality of nozzles 4 are connected, with which the fibers transported through the blown line can be sprayed with glue. These nozzles 4 are formed in the embodiment as two-component nozzles for a steam atomization. To each nozzle on the one hand a Leimzuführleitung 5 and on the other hand, a steam supply line 6 is connected. In the embodiment, ten nozzles 4 are provided (see. Fig. 1a ). For clarity, shows Fig. 1b the scheme only for a nozzle.

In die Leimzuführleitungen 5 sind einerseits Leimventile 7 und andererseits Durchflussmessvorrichtungen 8 integriert, und zwar in jede Leimzuführleitung 5 jeweils ein Leimventil 7 und eine Durchflussmessvorrichtung 8. Die Leimzuführleitungen 5 sind dann wiederum unter Zwischenschaltung der Leimventile 7 an einen gemeinsamen Leimverteiler 9 angeschlossen. Die Leimventile 7 sind unter Berücksichtigung der Durchflussmessungen einzeln regelbar, so dass mit Hilfe der Leimventile die Durchflussmenge für jede Leimzuführleitung 5 separat steuerbar oder regelbar ist. Ergänzend zu den Leimventilen 7 sind in jede Leimzuführleitung 5 Absperrventile 10 integriert, die z. B. bei Austausch von Bauteilen zum Einsatz kommen. Im Ausführungsbeispiel ist der Leimverteiler mit einem Temperaturmessgerät 11 und einem Druckmessgerät 12 sowie ggf. einem Viskositätsmessgerät 32 versehen. Der Leim gelangt von der lediglich angedeuteten Leimaufbereitung 13 über eine Leimeinspeisung 14 beidseitig in den Leimverteiler 9.Glue valves 7 and, on the other hand, flow measuring devices 8 are integrated into the glue supply lines 5, in each glue supply line 5 a glue valve 7 and a flow measuring device 8 a common glue distributor 9 connected. The glue valves 7 are individually controllable, taking into account the flow measurements, so that with the help of the glue valves, the flow rate for each Leimzuführleitung 5 is separately controlled or regulated. In addition to the glue valves 7 5 shut-off valves 10 are integrated into each Leimzuführleitung z. B. come with replacement of components used. In the exemplary embodiment, the glue distributor is provided with a temperature measuring device 11 and a pressure gauge 12 and optionally a viscosity measuring device 32. The glue passes from the merely indicated glue preparation 13 via a glue feed 14 on both sides into the glue distributor 9.

In die Dampfzuführleitungen 6 sind Dampfventile 15 integriert, und zwar vorzugsweise in jede Dampfzuführleitung 6 jeweils ein Dampfventil 15. Mit diesem Dampfventil lassen sich die einzelnen Dampfzuführleitungen 15 automatisch öffnen oder absperren. Eine Einzel-Regelung ist hier nicht vorgesehen. Ergänzend sind auch hier Absperrventile 16 zu Wartungszwecken vorgesehen. Die Dampfzuführleitungen 6 sind an einen gemeinsamen Dampfverteiler 17 angeschlossen. Dieser Dampfverteiler 17 ist mit einem Temperaturmessgerät 18 und/oder einem Druckmessgerät 19 verbunden. Eines oder mehrerer dieser Messgeräte können gemeinsam mit einem dem Dampfverteiler vorgeschalteten Dampfzuführventil 20 einen Regelkreis 21 bilden, so dass die Durchflussmenge oder der Druck regelbar sind. Dazu ist dem Dampfverteiler ein Durchflussmessgerät 22 vorgeordnet. Die Dampfeinspeisung 23 ist angedeutet.Steam valves 15 are integrated in the steam supply lines 6, preferably in each steam supply line 6, in each case one steam valve 15. With this steam valve, the individual steam supply lines 15 can be automatically opened or shut off. A single regulation is not provided here. In addition, shut-off valves 16 are also provided for maintenance purposes. The steam supply lines 6 are connected to a common steam distributor 17. This steam distributor 17 is connected to a temperature measuring device 18 and / or a pressure gauge 19. One or more of these measuring devices can form a control circuit 21 together with a steam supply valve 20 upstream of the steam distributor, so that the flow rate or the pressure can be regulated. For this purpose, a flow meter 22 is arranged upstream of the steam distributor. The steam feed 23 is indicated.

Ferner ist in Fig. 1 erkennbar, dass in die einzelnen Leimzuführleitungen 5 jeweils eine Wasserzuführleitung 24 mündet, wobei die Wasserzuführleitungen an einen gemeinsamen Wasserverteiler 25 angeschlossen sind. In die Wasserzuführleitungen 24 sind steuerbare oder regelbare Ventile 26 sowie ebenfalls Absperrventile 27 integriert.Furthermore, in Fig. 1 recognizable that in each Leimzuführleitungen 5 each a water supply line 24 opens, wherein the water supply lines are connected to a common water distributor 25. In the water supply lines 24 controllable or controllable valves 26 and also shut-off valves 27 are integrated.

Die in Fig. 1a und 1b schematisch angedeuteten Komponenten finden sich zum Teil in den Fig. 2, 3 und 4 wieder.In the Fig. 1a and 1b schematically indicated components can be found in part in the Fig. 2 . 3 and 4 again.

Fig. 2 zeigt insbesondere die Blasleitung bzw. Blow-Line mit der angedeuteten Zufuhr der Holzfasern. Außerdem sind dort die an die Blasleitung angeschlossen Düsen erkennbar, im Ausführungsbeispiel zehn Düsen, die gleichsam V-förmig hintereinander auf die Blasleitung aufgesetzt sind. Leimverteiler, Dampfverteiler und Wasserverteiler sind in Fig. 1 ebenfalls erkennbar. Fig. 2 shows in particular the blow pipe or blow-line with the indicated supply of wood fibers. In addition, there are the nozzles connected to the blow pipe recognizable, in the exemplary embodiment ten nozzles, which are placed as it were V-shaped one behind the other on the blow pipe. Glue distributors, steam distributors and water distributors are in Fig. 1 also recognizable.

Fig. 3 zeigt in zwei unterschiedlichen Ansichten insbesondere die Leimverteilung. Fig. 3 shows in two different views in particular the glue distribution.

Fig. 4 zeigt in zwei unterschiedlichen Ansichten insbesondere die Wasserverteilung. Fig. 4 shows in two different views in particular the water distribution.

Die dargestellte Beleimungsvorrichtung ist in einem übergeordneten Prozessrechner 31 integriert. Das bedeutet, dass die Steuerung bzw. Regelung der Beleimungsvorrichtung mit einem übergeordneten Prozessrechner erfolgt, der auch die übrigen Komponenten der Faserplattenanlage, z. B die Blasleitung, die Streuvorrichtung und die Pressvorrichtung steuert. Dieser Rechner 31 ist in Fig. 1b lediglich angedeutet.The illustrated gluing device is integrated in a higher-level process computer 31. This means that the control or regulation of the gluing device takes place with a higher-level process computer, which also controls the other components of the fiberboard plant, eg. B controls the blowing line, the spreading device and the pressing device. This calculator 31 is in Fig. 1b merely hinted.

So lässt sich der Beleimungsprozess dynamisch an die übrigen Prozessparameter anpassen. So kann die Beleimung empfindlich an den Betrieb des Refiners bzw. der Blow-Line angepasst werden. Es besteht beispielsweise die Möglichkeit, zur Variation der Beleimungsmenge insgesamt einzelne Leimzuführleitungen und damit auch Leimdüsen zu deaktivieren, so dass die Besprühung dann mit einigen Düsen erfolgt. Über die beschriebenen Durchflussmessvorrichtungen und Regelventile 7 der Beleimungseinrichtung kann für die übrigen, aktiven Düsen z. B. eine im Wesentlichen identische Durchflussmenge oder auch eine andere Durchflussmengenverteilung eingestellt werden. Der Beleimungsprozess kann folglich zunächst einmal durch empfindliche Beeinflussung der Durchflussmenge pro Düse über die Regelventile 7 beeinflusst werden. Außerdem besteht die Möglichkeit, den Beleimungsprozess dynamisch durch die Einstellung der Viskosität des Leims zu beeinflussen. Auch der Leimdruck kann verändert und insbesondere ausgewertet werden. Entscheidend ist dabei in der Regel der Differenzdruck zur Blow-Line. Schließlich kann auch eine empfindliche Einstellung über die Dampfsteuerung bzw. Regelung erfolgen. Hier ist es ausreichend, wenn über die Dampfventile 15 die einzelnen Dampfzuführleitungen 6 in Abhängigkeit von der Zahl der aktiven Leimdüsen geöffnet oder geschlossen werden. Eine Einzelregelung der Dampfzuführleitungen 6 ist nicht erforderlich. Zweckmäßig ist jedoch die Regelung der Dampfzuführung insgesamt über den dargestellten Regelkreis 21.This allows the gluing process to be adapted dynamically to the other process parameters. Thus, the gluing can be sensitively adapted to the operation of the refiner or the blow-line. It exists for example the Possibility to deactivate individual glue supply lines and thus also glue nozzles for the variation of the amount of gluing, so that the spraying then takes place with a few nozzles. About the described flow measuring devices and control valves 7 of the gluing device can for the remaining, active nozzles z. B. a substantially identical flow rate or another flow rate distribution can be set. Consequently, the gluing process can first of all be influenced by sensitive influencing of the flow rate per nozzle via the control valves 7. It is also possible to influence the gluing process dynamically by adjusting the viscosity of the glue. Also, the glue pressure can be changed and in particular evaluated. Decisive is usually the differential pressure to the blow-line. Finally, a sensitive adjustment can be made via the steam control. Here it is sufficient if the individual steam supply lines 6 are opened or closed via the steam valves 15 as a function of the number of active glue nozzles. An individual control of the steam supply lines 6 is not required. However, it is expedient to regulate the total steam supply via the illustrated control circuit 21.

Durch die Regelung der Beleimungsanlage und insbesondere die Integration der Regelung in den übergeordneten Prozessrechner 31 kann die Beleimung erheblich optimiert werden, so dass sich in einer solchen Anlage Faserplatten mit der erforderlichen Querzugfestigkeit bei deutlich reduziertem Leimeinsatz herstellen lassen.The regulation of the gluing plant and in particular the integration of the control in the higher-level process computer 31, the gluing can be significantly optimized, so that can be produced in such a plant fiberboard with the required transverse tensile strength at significantly reduced use of glue.

Die Anlage ist zudem wartungsfreundlich, z. B. durch die vorgesehene Möglichkeit der Wasserspülung. Die Wasserspülung setzt in Betriebspausen einzelne Düsen automatisch für einzelne Düsen 4 ein. Auch dieses wird von der Steuerung, z. B. der übergeordneten Steuerung, gewährleistet. Auf diese Weise besteht die Möglichkeit, die Beleimung variabel mit einer unterschiedlichen Düsenanzahl durchzuführen, ohne dass die Gefahr besteht, dass die zwischenzeitlich deaktivierten Düsen sich mit Leim zusetzen.The system is also easy to maintain, z. B. by the intended possibility of water flushing. The water rinse automatically sets individual nozzles for individual nozzles 4 during breaks in operation. This is also from the Control, z. As the parent control guaranteed. In this way, it is possible to perform the glue variably with a different number of nozzles, without the risk that the temporarily deactivated nozzles become clogged with glue.

In den Figuren ist im Übrigen die Druckluftzufuhr für die Düsen bzw. Ventile dargestellt. Dazu ist ein Druckluftverteiler 28 vorgesehen, welcher über Druckluftleitungen 29 auf die nicht dargestellten Düsennadeln der Düsen arbeitet, um diese zu öffnen und zu schließen. Im Übrigen können an den Druckluftverteiler 28 auch die einzelnen Ventilsteuerungen angeschlossen sein.Incidentally, the compressed air supply for the nozzles or valves is shown in the figures. For this purpose, a compressed air distributor 28 is provided which operates via compressed air lines 29 to the nozzle needles of the nozzles, not shown, in order to open and close them. Incidentally, the individual valve controls can be connected to the compressed air distributor 28.

Ferner ist in Fig. 1 eine weitere Zuführleitung 30 für einen Härter angedeutet.Furthermore, in Fig. 1 another supply line 30 indicated for a hardener.

Insgesamt werden im Rahmen der Erfindung die Holzfasern durch das Blasrohr 3 geblasen und über Dampf unterstützte Düsen 4 mit Betriebsstoffen, z. B. Leim, besprüht. Die Düsen 4 werden je nach Prozessbedingen mit Leim oder Wasser beaufschlagt. Die Zuführung von Leim oder Wasser wird über Ventile geregelt. Das Wasser wird zum Spülen der Düsen verwendet. Wasser, Dampf und Leim werden den Düsen über Verteiler zugeführt. Der Härter wird der letzten Düse des Blasrohrs direkt über die Härterzuführleitung 30 zugeführt.Overall, the wood fibers are blown through the blowpipe 3 and supported by steam nozzles 4 with supplies such. As glue, sprayed. The nozzles 4 are subjected to glue or water depending on the process conditions. The supply of glue or water is regulated by valves. The water is used to rinse the nozzles. Water, steam and glue are fed to the nozzles via distributors. The hardener is fed to the last nozzle of the blowpipe directly via the hardener feed line 30.

In Fig. 3 ist nochmals angedeutet, dass der Leim über das Verteilerrohr den einzelnen Düsen zugeführt wird. Der Härter wird über einen separaten Anschluss der letzten Düse zugeführt. Der Anschluss ist am Verteilerrohr der Leimverteilung befestigt. Die Ventile regeln wie erläutert den Zufluss. Der Durchflussmesser meldet die Fördermenge an die Steuerung. Das angedeutete Rückschlagventil verhindert den Rückfluss. Absperrventile dienen dem Austausch von Bauteilen.In Fig. 3 is again indicated that the glue is supplied via the manifold to the individual nozzles. The hardener is fed via a separate connection to the last nozzle. The connection is attached to the manifold of the glue distribution. The valves regulate the inflow as explained. The flow meter reports the flow to the controller. The indicated check valve prevents backflow. Shut-off valves are used to replace components.

In ähnlicher Weise lassen sich weitere Einzelheiten der Fig. 4 entnehmen, welche insbesondere den Wasserverteiler betrifft. Das Wasser dient zum Spülen und wird über das Verteilerrohr den einzelnen Düsen zugeführt. Bei Produktionsunterbrechungen werden alle Düsen automatisch gespült. Während der Produktion werden nur abgeschaltete Düsen gespült. Auch hier regeln Ventile den Zufluss. Der Durchflussmesser meldet die Fördermenge an die Steuerung. Das Rückschlagventil verhindert auch hier den Rückfluss. Absperrventile dienen dem Austausch von Bauteilen.Similarly, further details of the Fig. 4 which relates in particular to the water distributor. The water is used for rinsing and is supplied via the manifold to the individual nozzles. During production interruptions, all nozzles are automatically rinsed. During production only disconnected nozzles are rinsed. Again, valves control the inflow. The flow meter reports the flow to the controller. The check valve also prevents the backflow. Shut-off valves are used to replace components.

Claims (16)

  1. A device for gluing fibres or similar particles, particularly for the production of wooden composite boards, e.g. fibreboards,
    having a blow line (3), by means of which the fibres to be glued are transported, wherein a plurality of nozzles (4) opening into the blow line are connected to the blow line, using which nozzles the fibres that are transported through the blow line can be sprayed with glue,
    wherein the nozzles (4) are constructed as multi-substance nozzles, e.g. two-substance nozzles for steam atomisation and at least one glue supply line (5) and one steam supply line (6) are connected to each nozzle (4) characterised
    in that at least one glue valve (7) and one flow measuring device (8) are integrated into each glue supply line (5) and in that the glue valves (7) and the flow measuring devices (8) are connected to at least one control and/or regulating device, so that the flow volume for each nozzle (4) can be controlled or regulated separately using the glue valves (7).
  2. The device according to claim 1, characterised in that the glue supply to one or more nozzles can be blocked using the glue valves (7) and in that one predetermined flow volume, e.g. an essentially identical flow volume, can be set using the glue valves (7) for the remaining nozzles (4).
  3. The device according to claim 1 or 2, characterised in that at least six, preferably at least ten nozzles are connected to the blow line (3), which nozzles are distributed along the blow line and/or over the circumference of the blow line.
  4. The device according to one of claims 1 to 3, characterised in that the glue supply lines (5) are connected to a common glue distributor (9), which is loaded with glue, wherein the glue distributor (9) is preferably provided with a temperature measuring device (11), a pressure measuring device (12) and/or a viscosity measuring device.
  5. The device according to one of claims 1 to 4, characterised in that (controllable) steam valves (15) are integrated into the steam supply lines (6).
  6. The device according to claim 5, characterised in that the steam supply lines (6) are connected to a common steam distributor (17), which is loaded with steam, wherein the steam supply to be steam distributor (17) can be controlled or regulated, e.g. can be regulated to the flow volume or the pressure, wherein the steam distributor (17) is preferably provided with a temperature measuring device (18) and/or a pressure measuring device (19) and/or a flow measuring device (22).
  7. The device according to one of claims 1 to 6, characterised in that the control and/or regulating device of the gluing device is integrated into a superordinate process computer (31), which controls a system for producing wooden composite boards, into which system the gluing device is integrated.
  8. The device according to claim 7, characterised in that the measuring devices (11, 12, 18, 19, 20) and/or the valves, e.g. glue valves, steam valves, etc., are connected to the superordinate process computer (31).
  9. The device according to one of claims 1 to 8, characterised in that water supply lines (24) are connected to the glue supply lines (5), e.g. via a multi-way valve, using which water can optionally be supplied to the nozzles (4) for the purpose of cleaning.
  10. A method for gluing fibres or similar particles, particularly for producing wooden composite boards, e.g. fibreboards, using a device according to one of claims 1 to 9, characterised in that the flow volume of the glue to the individual nozzles is controlled or regulated separately for each nozzle using the glue nozzles.
  11. The method according to claim 10, characterised in that the glue valves, steam valves, water valves, etc. are controlled or regulated by a superordinate process computer.
  12. The method according to claim 10 or 11, characterised in that the gluing device or the components thereof are controlled or regulated by a superordinate process computer, which also controls or regulates the blow line and/or a subordinate spreading device and/or a subordinate pressing plant.
  13. The method according to one of claims 10 to 12, characterised in that the number of active nozzles/glue supply lines and/or the flow volume of the glue and/or the flow volume of the steam is controlled or regulated depending on the operation of the blow line, e.g. depending on the fibre throughput and/or pressure in the blow line.
  14. The method according to one of claims 10 to 13, characterised in that the flow volume of the glue and/or the steam quantity is controlled or regulated as a function of the viscosity of the glue.
  15. The method according to one of claims 10 to 14, characterised in that the viscosity of the glue is adapted as a function of the remaining process parameters.
  16. The method according to one of claims 10 to 15, characterised in that the glue pressure is set as a function of the remaining process parameters.
EP12724953.0A 2011-05-27 2012-05-25 Device and method for gluing fibers Active EP2714349B1 (en)

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SI2714349T1 (en) 2017-03-31
KR101547050B1 (en) 2015-08-24
BR112013030337A2 (en) 2016-11-29
ES2605810T3 (en) 2017-03-16
AU2012264913A1 (en) 2013-12-12
CL2013003375A1 (en) 2014-05-23
AR086561A1 (en) 2014-01-08
DE102011103326B4 (en) 2014-08-07
PL2714349T3 (en) 2017-05-31
KR20140032418A (en) 2014-03-14
DE202012012827U1 (en) 2014-02-26
WO2012163828A1 (en) 2012-12-06
CO6831980A2 (en) 2014-01-10
RU2559440C2 (en) 2015-08-10
RU2013157335A (en) 2015-07-10
CA2837397C (en) 2017-04-11
BR112013030337B1 (en) 2021-03-09
UA108316C2 (en) 2015-04-10
MX351825B (en) 2017-10-10
ZA201308889B (en) 2015-02-25
CN102990760B (en) 2016-03-16
MX2013013559A (en) 2014-05-01
CN102990760A (en) 2013-03-27
US20140106069A1 (en) 2014-04-17
CN202826002U (en) 2013-03-27
LT2714349T (en) 2017-01-25
AU2012264913B2 (en) 2017-02-16
PT2714349T (en) 2016-12-12
HUE031134T2 (en) 2017-07-28
EP2714349A1 (en) 2014-04-09
CA2837397A1 (en) 2012-12-06
US9254581B2 (en) 2016-02-09
DE102011103326A1 (en) 2012-11-29

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