EP2531331B1 - Methods and installation for producing a particle mat from at least one spread layer - Google Patents

Methods and installation for producing a particle mat from at least one spread layer Download PDF

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Publication number
EP2531331B1
EP2531331B1 EP11710668.2A EP11710668A EP2531331B1 EP 2531331 B1 EP2531331 B1 EP 2531331B1 EP 11710668 A EP11710668 A EP 11710668A EP 2531331 B1 EP2531331 B1 EP 2531331B1
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European Patent Office
Prior art keywords
scattering
width
scattered
per unit
weight per
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EP11710668.2A
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German (de)
French (fr)
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EP2531331A1 (en
Inventor
Gernot Von Haas
Peter Rath
Reinhard Schwinn
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Dieffenbacher GmbH Maschinen und Anlagenbau
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Dieffenbacher GmbH Maschinen und Anlagenbau
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • B27N3/10Moulding of mats
    • B27N3/14Distributing or orienting the particles or fibres
    • B27N3/146Controlling mat weight distribution
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • B27N3/18Auxiliary operations, e.g. preheating, humidifying, cutting-off

Definitions

  • the invention relates to a method for producing a spreading material mat from at least one scattered layer for pressing in a press in the course of the production of wood-based panels according to the preamble of claim 1 and a plant for producing a spreading material from at least one scattered layer for pressing in a press in the course the production of wood-based panels according to the preamble of claim 16.
  • Complicated is also the removal of grit from the outer layers of a grit mat, especially in flat grit for the production of oriented scattered boards (OSB - oriented strand board), since the large-scale chips or chips tend to leave inaccurate gaps in their removal from the grit mat.
  • OSB - oriented strand board oriented scattered boards
  • lateral movable adjustment elements are provided in the scattering head usually in the production direction respectively in the longitudinal extent of the forming belt, ensure that below the scattering rollers uniformly scattered Material in the edge areas increasingly in the direction of the longitudinal center line of the spreading material mat is moved.
  • a uniform basis weight considered over the width of the spreading material mat results that has a continuous increase on the outer longitudinal sides.
  • this solution has an advantage in the compression, since thus the necessary measures for an edge exaggeration of the grit are created and thus even with a bulging of the grit in the press in the edge regions a slight increase in density or even over the entire surface of a material plate uniform Density can be obtained.
  • a form strand usually corresponds to the endless forming belt with scattering heads arranged above it for "shaping" a grit mat can have a length of up to 50 m. Even if gentle transport is well within the reach of today, the longitudinal edge of the spreading material mat suffers from vibration or other pretreatments, such as in steam discharge systems, hot air devices, pre-pressing or the like.
  • a spreading material mat usually has to be trimmed at the longitudinal edges before it can be transferred from the molding strand into the press.
  • edge pieces of the grit mat uncontrollably crumble and fall into the transfer gap or cake on the lower steel band of the press. Accordingly, devices for edge trimming a grit mat are usually provided, which trim the grit mat in the form of strand at the longitudinal edges.
  • the object of the invention is to generate a method and a plant for producing at least one layer of a spreading material mat in which a width of the spreading material mat and variable weight per unit area can be adjusted in a gentle and simple manner and / or the basis weight distribution over the width can be improved after dosing by a metering device or a guide device against occurring air vortices.
  • the invention for the method in that by means of at least one mechanical guide device between the metering device and the scattering device at least partially displaced the material in the material flow substantially transversely to the production direction of the forming belt and / or that at least partially the material to be dispersed in the material flow in its movement Direction of movement is stabilized, wherein the mechanical guide device by means of distributed over the width baffles only partially influenced the flow of material by the baffles for partial displacement of the material spread over the width only partially extend in length in the material flow and are at an angle to the direction of movement of the material flow.
  • the solution for a system is that for at least partial displacement of the material to be spread substantially transversely to the production direction of the forming belt in the material flow and / or that at least partially stabilize the material to be spread in the material flow in the direction of movement between the metering of the bunker and the scattering device of the scattering head arranged in the mechanical guide device over the width distributed baffles for partially influencing the flow of material, the baffles for partial displacement of the material to be spread over the width only partially extend in length in the material flow and at an angle to the direction of movement of the material flow are.
  • a grit mat so that the outer longitudinal edges in the scattering, and in the area of the scattering heads a low Have basis weight, in particular as the average basis weight of the grit mat.
  • This is preferably achieved in that, in the falling material flow, parts of the material to be spread on the edge regions, viewed transversely over the forming belt, are displaced during the passage in the spreading head in the direction of the central longitudinal extent of the molding strand or of the spreading material mat. It turns out that viewed from a longitudinal side in the direction of the center of a grit mat only a lower basis weight arises in the grit mat, that detached from a higher basis weight and finally merges into the average surface weight of the grit mat. If this grit mat is now trimmed, preferably at the set peak of the higher basis weight (peak), advantageously the smallest possible trimmed material but nevertheless a grit mat with a desired weight increase in the edge regions is obtained longitudinally.
  • a possible guiding device preferably does not influence the entire falling material stream or material stream to be introduced into the scattering head, but only a part thereof. This is necessary to avoid extensive gaps in the spreading material mat. Also is not adjusted by the guide device, as usual in a width adjustment, the spread of the grit mat, but only parts of the material stream are preferably moved or diverted to achieve a different basis weight distribution over the width of the grit mat. This can be done with one or more guiding devices.
  • metering surface weight describes the theoretical basis weight of a material flow which occurs when a metering device discharges scattered material across the width B1 in order to transfer it to a spreading head and deposit it there on a forming belt of width B.
  • B> B1 which is not mandatory.
  • the material flow has a depth of length L in the direction of production / direction of movement of the forming belt.
  • the scattered surface weight describes the weight per unit area of the spreading material mat across the width of the forming belt with a width B2. If no changes are made by the spreading head or other devices on the Dosieropterites, the Dosier vomites corresponds to the Streu lakethe. If the grit mat is trimmed, this is replaced by the trimming a new width B3, where B3 ⁇ B2.
  • the device for the targeted storage of the material to be spread on the forming belt is designated. This is preferably found directly above the forming belt and has as the last mechanical, in particular moving, machine element contact with the spreading material before it leaves the spreading head and comes to rest on the forming belt respectively the spreading material mat.
  • the substantially uniform Dosier vomitis DFG of the material flow is changed by the guide into a differentiated Streu inhabitwith SFG, wherein a differentiated Streu effetwhen SFG is to be understood a contour that may have different shapes, as will be described in more detail below.
  • the stabilization and / or the displacement of the material to be spread in the material flow is carried out in several stages with successive guide devices.
  • a stabilization may be necessary if, in particular flat or orientable grit produced by its movement air vortex, which can lead to a shift of the material to be spread in the longitudinal or transverse direction of the forming belt.
  • the stabilization and / or the displacement is preferably carried out before the material flow enters the scattering head and / or before the first contact of the material flow with a moving machine element of the scattering head.
  • the grit should preferably be scattered in a width B2 on the forming belt to a grit mat, which corresponds substantially to the width B1 of the material flow after the metering device. It is also preferred that at least one first area with a higher basis weight FH than the dosing area weight DFG and adjoining at least one further area with a lower basis weight FG, in particular as the dosing area weight DFG, by means of the guide device in the area weight SFG over the width B2, is set. This is especially provided when lightweight panels are to be produced in furniture.
  • a substantially lower basis weight FG than the metering surface weight DFG can be set at the longitudinal edges of the spreading material mat in order to minimize the amount of material to be spread on the trimming device.
  • the spreading material mat is cut between the spreading head and the press by means of a trimming at the longitudinal edges to a width B3 with longitudinal edges, wherein the longitudinal edges can be arranged in areas with a higher basis weight FH than the Dosier vomitong DFG.
  • at least one baffle arranged between the dosing device and the spreader preferably movable and / or pivotable by means of at least one adjusting device, is held at least partially in the spreading material falling in the direction of movement as a mechanical guide device.
  • the grit is at least partially guided between bunker and scattering head substantially in the direction of fall along a guide flap, wherein the guide flap can also be arranged at an angle to the grit respectively to the material flow adjustable.
  • the guide flap can also be arranged at an angle to the grit respectively to the material flow adjustable.
  • the guide flap and / or at least one baffle which are arranged across the width of the forming belt and for stabilizing and / or influencing the Dosier vomitess DFG in your position to adjust the spreading material moved in the direction of fall and / or to the forming belt and / or to the side walls of the scattering head by means of adjusting devices.
  • the baffles are introduced in their orientation in the production direction of the forming belt in the length L of the material flow 24 substantially 10% to 80%, preferably between 30% and 50%. That is pre-voted in a meaningful and practical way blockages in the case area and so-called stray holes in the spreading material mat.
  • the system is independent on its own and can be used alone with the features described. At the same time, however, the system is also suitable in particular for carrying out the method according to claim 1.
  • FIG. 1 on the left side in an schematic view of an exemplary plant for producing a grit mat 7 for pressing in a press 22 is shown.
  • grit 9 is registered in a bunker 2 and controlled by means of a back stripping device 25 and underlying, endlessly circulating bunker bottom belt 16 a metering device 15 is supplied.
  • the metering device 15 carries the grit over a width B1 with a uniform Dosier vomites DFG (right representation below).
  • the material flow 24 passes through at least one mechanical guide device 5 for stabilizing the material 9 moving in the material to be spread 9 and / or for setting a comparison with the existing over the width B1 Dosier perennialitesites DFG differing or uneven Streuannichiefs SFG across the width B2 of the spreading material mat 7 respectively of the forming belt 8.
  • the guide device 5 for stabilizing and / or displacement of the scattering material 9 in the material flow 24 substantially after the metering device 15 and before the material flow 24 in the scattering head 1 and / or before the first contact of the material flow 24 with a Moving machine element (eg opening rollers, screens or the like.) Of the scattering head 1 is arranged.
  • a guide flap 18 with optional mechanical or automatic adjusting devices may be arranged. The guide flap 18 is arranged over the entire width of the forming belt 8 and / or the scattering head 1, at least over the width B1 of the scattering material 9 after the metering device 15. As in the right drawing of the FIG.
  • an optional baffle 18 are arranged by their angular arrangement and their only partial engagement in the length L of the material flow 24 (left) a shift of parts of the material to be spread 9 of the material flow 24th effect during the Vorbei fallens or -flowing, so that results from a uniform Dosier vomites DFG (right representation below) an irregular contour of the scattering surface weight SFG within the grit mat 7 on the forming belt 8. Due to the fact that the mechanical guide device 5 only partially dips into the material flow 24, there remains sufficient scattered material 9 in an unobstructed manner to ensure that the forming belt 8 is covered, so that no underscattering or "empty spots" in the spreading material mat 7 can occur.
  • one or more dissolving devices 4 can be arranged for the grit 9, preferably, these are arranged between the guide flap 18 and the scattering device 14.
  • the guide 6 is not to be understood as a lateral adjustment for the width B2, but only causes the displacement of another part of the material 9, since the "theoretical depth" L now extends over a longer range and the guide 6 only a part of it occupies.
  • FIG. 2 different basis weight distributions over the widths B1, B2 and B3 are shown. These are specifically concerned here with the basis weight distributions at the longitudinal edges 20 and 17 of the spreading material mat 7.
  • the bottom diagram shows a conventional spreading material mat according to the prior art, which dosed over a width B1 and by means of lateral sliding walls completely (based on the material flow) was reduced from a fall width 21 to a width B2 of the grit mat. This results in a (steeper) increase of the marginal weight per unit area in the originally scattered grit mat 7 at the longitudinal edges 17. Subsequently, a high proportion of grit 9 is removed again due to the trimming by the separated areas with this elevation when the grit mat on the width B3 is reduced.
  • the two upper representations show an edge scattering with a curvy edge behavior, so that a maximum of the edge-side scatter surface weight SFG at the new longitudinal edge 20 preferably results at the separating cut by the trimming device 23.
  • the fall width 21 (of the material flow 24) corresponds to the width B2 of the spreading material mat
  • a higher hill is achieved at the edge regions for trimming because either the baffles 10, for example, immerse deeper in the material flow and / or on the lateral sliding walls (Not shown) the fall width 21 of the material flow is reduced to a width B1 of the grit mat 7 and thus more material is scattered at the edge regions.
  • the metering surface weight according to B1 is shown if the spreading material 9 would be deposited unaffected in its basis weight distribution on the forming belt 8.
  • FIG. 3 shows a section in plan view through the guide 5 after FIG. 1 with parallel to the direction of fall baffles 10 on a guide flap 18 for stabilizing the material flow 24 of a length L and a width B1 of grit 9 during the passage from the bunker 2 in the scattering head 1.
  • This has the background that a stabilization of the falling material to be scattered by Advantage is.
  • the arrangement of several baffles in a kind of waiting position can be positive insofar as there are different solutions to adjust the spread.
  • baffles 10 could not be moved inwards far enough to nevertheless carry out the method.
  • lateral baffles over the entire length of the scattering head can be realized.
  • more material could be displaced in the direction of the middle of the width of the forming belt advantageously with a plurality of baffles, so that the desired profile nevertheless forms.
  • FIG. 4 shows a plan view of the region of the molding strand between the scattering head 1 and the press 22 showing the different widths, such as the width B of the forming belt 8, the width B1 of the Dosier vomitiss DFG respectively of the material flow 24, the width B2 of the grit material 7 respectively of the Streu effetiss SFG, and the width B3 of a prepared for pressing and trimmed grit mat 7 in the production direction 11 after a Be
  • FIGS. 5 to 8 show a coherent representation of a possible manufacturing process of a grit mat 7 with exemplary parameters.
  • the representation is to be worked out in order of the figures opposite to the material flow of the production, since FIG. 5 the already suitable for pressing and trimmed grit mat 7 with the longitudinal edges 20 and a width B3, FIG. 6 the unedged grit mat and the FIGS. 7 and 8 represent the displacement of the falling material to be spread by means of the guide 5.
  • the grit mat 7 has over the uniform metering surface weight on a non-uniform contour of the scattering surface weight SFG over the width B3, with places higher basis weight FH alternate with areas of lower basis weight FG.
  • the number of baffles used for a higher and / or lower basis weight FG can also be more than one, in particular the FIGS. 7 and 8 represent.
  • At the longitudinal edges is the desired for compression surface weight increase of the surface weight SFG.
  • FIG. 6 shows the grit mat in the original width B2 after and during the scattering with the longitudinal edges 17th
  • Corresponding to this shows FIG. 7 the necessary adjustment of the guide device 5 for influencing the Dosier vomitess DFG across the width B1 for producing a scattering surface weight SFG across the width B2.
  • the baffles 10 are at an angle to the direction of movement 12 of the material flow 24 from grit. 9 FIG.
  • FIG. 9 shows for a more complex process application respectively for fine adjustment a multiple arrangement of the guide device, consisting of a guide device 5 and downstream in the direction of movement 12 of the material flow guide 5 '.
  • the first Guide device 5 serves to displace the scattering material 9 over the width B1, wherein the second guide device 5 'is arranged for stabilization and for the subsequent homogenization of the moving in the direction of movement 12 material flow 24.
  • the guide 5 'thus leads to a fine adjustment of the displacement of the material to be spread 9 by the guide 5' to a "wide" emigration / displacement of the material to be 9 prevented.
  • FIG. 10 There is a representation of a part of a guide device 5 with a possible arrangement of a guide plate 10 with associated adjusting device 19 for setting different angles of the guide plate 10 in two corresponding schematic views.
  • the baffle 10 can be changed by means of the adjusting devices 19 at a distance from the guide flap 18 and moved through the opening 27 and changed accordingly the penetration depth into the material flow 24.
  • FIG. 11 shows a possible adjustment 19 for each other by means of push rods 29 connected baffles 10.
  • the baffles 10 are alternately connected to different push rod 29, so that upon movement of a push rod 29 every second baffle 10 is moved in the direction of the push rod 29.
  • baffles 10 not only form a vertical angle to a wall or to the guide flap 18, but also for this purpose, preferably have separately adjustable angle. It is further preferred that the openings 27 have means for sealing, so that unnecessary dust or grit can escape from the fall area.
  • the spreading material mat 7 it should be noted in summary that preferably at both longitudinal edges 17 of the spreading material mat 7, a substantially lower basis weight FG should be arranged than the metering surface weight DFG.
  • longitudinal edges 20 are arranged on the spreading material mat 7 with longitudinal edges 17 by means of a trimming device 23, wherein the longitudinal edges 20 have a higher basis weight FH than the dosing surface weight DFG and / or the scattering surface weight SFG and / or than the average basis weight of the spreading material mat 7.
  • the preparation of the grit mat 7 is carried out in a claimed system and / or by the preparation of the grit mat according to the method. LIST OF REFERENCE NUMBERS 1.

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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)
  • Treatment Of Fiber Materials (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer Streugutmatte aus zumindest einer gestreuten Schicht zur Verpressung in einer Presse im Zuge der Herstellung von Holzwerkstoffplatten nach dem Oberbegriff des Anspruches 1 und eine Anlage zur Herstellung einer Streugutmatte aus zumindest einer gestreuten Schicht zur Verpressung in einer Presse im Zuge der Herstellung von Holzwerkstoffplatten nach dem Oberbegriff des Anspruches 16.The invention relates to a method for producing a spreading material mat from at least one scattered layer for pressing in a press in the course of the production of wood-based panels according to the preamble of claim 1 and a plant for producing a spreading material from at least one scattered layer for pressing in a press in the course the production of wood-based panels according to the preamble of claim 16.

Bei der Herstellung von Werkstoffplatten aus streufähigen Materialien wird ein Gemisch aus Partikeln oder faserigen Stoffen und einem Bindemittel zu einer Streugutmatte auf einem Form- oder Förderband gestreut, wobei die Streugutmatte anschließend einer ggf. nötigen Vorbehandlung und schließlich einer Verpressung zugeführt wird. Hierbei werden üblicherweise diskontinuierliche Etagenpressen und kontinuierlich arbeitende Pressen verwendet, wobei in letzterer zwischen zwei umlaufenden Stahlbändern eine gestreute Pressgutmatte mit beleimten Streupartikeln unter Druck und Wärmeeintrag verpresst wird. Neben den reinen Partikelplatten (MDF) kommen auch gespante Holzschnitzel zur Anwendung, die in der Regel orientiert gestreut werden, um den hergestellten Holzwerkstoffplatten in Länge und Breite verstärkt Festigkeit zu verleihen. Dabei werden Herstellungsarten unterschieden für orientiert gestreute Platten in längs und quer Richtung (OSB) und in einer Orientierung rein in Längsrichtung (OSL). Üblicherweise werden derartige OSB- und OSL-Platten auf kontinuierlichen Doppelbandpressen oder Taktpressen hergestellt.In the production of material plates from scatterable materials, a mixture of particles or fibrous materials and a binder is scattered to a grit mat on a forming or conveyor belt, the grit mat is then fed to any necessary pretreatment and finally a compression. In this case, usually discontinuous floor presses and continuously operating presses are used, wherein in the latter between two rotating steel belts a scattered pressed material mat is pressed with glued scattering particles under pressure and heat input. In addition to the pure particle plates (MDF) wood chips are also used, which are usually oriented and scattered in order to increase the strength and strength of the wooden boards made in length and width. Differentiation is made for oriented scattered plates in the longitudinal and transverse direction (OSB) and in the orientation purely in the longitudinal direction (OSL). Usually, such OSB and OSL boards are produced on continuous double belt presses or cycle presses.

Bei heutigen Produktionsverfahren von Werkstoffplatten werden folgende Arten von Streugutmatten erstellt, die anschließend verpreßt werden:

  • Streugutmatten mit gleichmäßigem Flächengewicht in Länge und Breite
  • Streugutmatten mit Längsranderhöhungen des Flächengewichts um während des Transportes Verluste an Material oder Schwund an Dichte in den Randbereichen durch Ausbeulen der Streugutmatte während des Verpressens zu kompensieren.
  • Streugutmatten mit unterschiedlichen Flächengewichtskonturen in Länge und Breite, wobei in der Regel nach einem Streukopf und der Erstellung einer homogenen Streugutmatte mit gleichmäßigem Flächengewicht in einer separaten nachfolgenden Vorrichtung in Produktionsrichtung kontinuierliche und/oder über die Breite beabstandete Spuren an zusätzlichem Material aufgelegt oder mittels Entnahmevorrichtungen aus der Streugutmatte entnommen werden.
In today's production of material plates of the following types of spreading material mats are created, which are then pressed:
  • Spreading mats with uniform basis weight in length and width
  • Spreading mats with longitudinal edge heights of the basis weight to compensate during transport losses of material or loss of density in the edge areas by bulging of the grit mat during the pressing.
  • Spreading mats with different basis weight contours in length and width, usually after a scattering head and the creation of a homogenous spreading material mat with uniform basis weight in a separate subsequent device in the production direction continuous and / or spaced over the width tracks of additional material or by means of removal devices from the Grit mat can be removed.

Die bisherigen Anwendungsfälle für Streugutmatten mit einem über Länge und Breite differenzierten Flächengewichtsprofil und deren mechanischen respektive anlagentechnischen Umsetzungen haben hinsichtlich einer ökonomischen Anwendung einige Nachteile:
Insbesondere bei Vorrichtungen, die in das Flächengewicht einer optimal gestreuten Streugutmatte eingreifen, sei es durch Auflage von weiteren Spuren an Streugut oder durch Abfräsen von Bereichen mittels sogenannter "Scalper" ergeben sich Produktionsunterbrechungen durch Stillstände der aufwendigen Maschinen. Insbesondere die Handhabung des Streugutes bei der gleichmäßigen Zuführung von wenigen cm oder dm breiten Spuren auf eine Streugutmatte ergeben sich Probleme für die aufwendige maschinentechnische Lösungen gefunden werden müssen. Erschwert ist auch die Abfuhr von Streugut aus den Deckschichten einer Streugutmatte, insbesondere bei flächigem Streugut zur Herstellung von orientiert gestreuten Platten (OSB - oriented strand board), da die großflächigen Späne oder Schnitzel dazu neigen ungenaue Lücken bei ihrer Entnahme aus der Streugutmatte zu hinterlassen.
The previous applications for grit mats with a differentiated over length and width basis weight profile and their mechanical or plant engineering implementations have some disadvantages in terms of economic application:
In particular, in devices that intervene in the basis weight of an optimally scattered grit mat, whether by rest of more traces of grit or by milling of areas by means of so-called "Scalper" results in production interruptions due to stoppages of expensive machinery. In particular, the handling of the material to be spread in the uniform supply of a few cm or dm wide tracks on a grit mat arise problems for the complex mechanical engineering solutions must be found. Complicated is also the removal of grit from the outer layers of a grit mat, especially in flat grit for the production of oriented scattered boards (OSB - oriented strand board), since the large-scale chips or chips tend to leave inaccurate gaps in their removal from the grit mat.

Insofern aber nur eine Randüberhöhung der Längsränder einer Streugutmatte durchgeführt werden soll, werden in der Regel in Produktionsrichtung respektive in Längserstreckung des Formbandes seitliche verfahrbare Justierungselemente im Streukopf vorgesehen, die dafür sorgen, dass unterhalb der Streuwalzen das gleichmäßig gestreute Material in den Randbereichen vermehrt in Richtung der Längsmittenlinie der Streugutmatte verschoben wird. Es ergibt sich also ein über die Breite der Streugutmatte betrachtetes gleichmäßiges Flächengewicht, dass an den außen liegenden Längsseiten eine stetige Erhöhung aufweist.
Grundsätzlich bedeutet diese Lösung einen Vorteil bei der Verpressung, da damit die notwendigen Maßnahmen für eine Randüberhöhung der Streugutmatte geschaffen sind und somit auch bei einem Ausbeulen der Streugutmatte in der Presse in den Randbereichen eine leichte Überhöhung der Dichte oder eine über die ganze Fläche einer Werkstoffplatte gleichmäßige Dichte erhalten werden kann.
Ein Formstrang, entspricht in der Regel dem endlosen Formband mit darüber angeordneten Streuköpfen zur "Formung" einer Streugutmatte kann eine Länge von bis zu 50 m aufweisen. Auch wenn heutzutage ein schonender Transport durchaus im Bereich des machbaren liegt, leidet doch die Längskante der Streugutmatte durch Vibration oder durch andere Vorbehandlungen wie in Dampfstoßanlagen, Heißluftvorrichtungen, Vorpressen oder dergleichen. Erschwerend kommt hinzu, dass bei mehreren Streuköpfen in Folge minimale Abweichungen der Randstreuqualität bzw. des Ortes vorkommen können, die ebenfalls die Qualität der Längsränder einer Streugutmatte verschlechtern.
Zusammengefasst lässt sich also feststellen, dass eine Streugutmatte in der Regel an den Längsrändern besäumt werden muss, bevor diese vom Formstrang in die Presse übergeben werden kann. Insbesondere bei der kontinuierlichen Herstellung in einer kontinuierlich arbeitenden Doppelbandpresse soll vermieden werden, dass während der Übergabe an die Stahlbänder der Presse Randstücke der Streugutmatte unkontrolliert abbröckeln und in den Übergabespalt fallen oder auf dem unteren Stahlband der Presse festbacken.
Dementsprechend werden in der Regel Vorrichtungen zur Randbesäumung einer Streugutmatte vorgesehen, die im Formstrang die Streugutmatte an den Längsrändern beschneiden. Dies hat den ökonomischen Vorteil, dass das hier anfallende Streugut sofort wieder in den Streuprozess zurück geführt werden kann, ohne dass das Material nochmals die aufwendige Vorproduktion (Aufbereitung, Trocknung, Beleimung) durchlaufen muss. Dieser Maßnahme sind allerdings Grenzen gesetzt, da das zurück geführte Streugut bereits einen längeren Zeitraum beleimt ist und das Bindemittel auch ohne Zufuhr von Druck und Wärme über die Zeit aushärtet. Auch sollte es das Ziel sein die zurückgeführte Menge an Streugut möglichst gering zu halten. Es ist aber offensichtlich, dass nach den oben stehenden Ausführungen gerade die Randbereiche der Streugutmatte, die das größte Flächengewicht durch die stetige Streuüberhöhung aufweisen besäumt werden müssen.
Insofar as only an edge cant of the longitudinal edges of a grit mat is to be performed, lateral movable adjustment elements are provided in the scattering head usually in the production direction respectively in the longitudinal extent of the forming belt, ensure that below the scattering rollers uniformly scattered Material in the edge areas increasingly in the direction of the longitudinal center line of the spreading material mat is moved. Thus, a uniform basis weight considered over the width of the spreading material mat results that has a continuous increase on the outer longitudinal sides.
Basically, this solution has an advantage in the compression, since thus the necessary measures for an edge exaggeration of the grit are created and thus even with a bulging of the grit in the press in the edge regions a slight increase in density or even over the entire surface of a material plate uniform Density can be obtained.
A form strand, usually corresponds to the endless forming belt with scattering heads arranged above it for "shaping" a grit mat can have a length of up to 50 m. Even if gentle transport is well within the reach of today, the longitudinal edge of the spreading material mat suffers from vibration or other pretreatments, such as in steam discharge systems, hot air devices, pre-pressing or the like. To make matters worse, that with several scatter heads in a row, minimal deviations of the edge litter quality or of the location can occur, which also worsen the quality of the longitudinal edges of a litter mat.
In summary, it can thus be stated that a spreading material mat usually has to be trimmed at the longitudinal edges before it can be transferred from the molding strand into the press. Especially at the continuous production in a continuous double belt press should be avoided that during the transfer to the steel belts of the press edge pieces of the grit mat uncontrollably crumble and fall into the transfer gap or cake on the lower steel band of the press.
Accordingly, devices for edge trimming a grit mat are usually provided, which trim the grit mat in the form of strand at the longitudinal edges. This has the economic advantage that the resulting grit can be returned to the scattering process immediately without the material having to go through the elaborate pre-production (preparation, drying, gluing). This measure, however, limits, since the back-guided grit is already glued for a long period of time and the binder cures without supply of pressure and heat over time. It should also be the goal to keep the amount of grit returned as low as possible. However, it is obvious that according to the above explanations, it is precisely the edge areas of the spreading material mat which have to be trimmed with the greatest weight per unit area due to the steady scattering increase.

Weiter hat die Erfahrung und die Praxis gezeigt, dass insbesondere bei einem relativ frei fallendem Materialstrom nach der Dosiervorrichtung unkontrollierbare Luftwirbel auftreten, die eine ungewollte Flächengewichtsverteilung über die Breite aber auch über die Länge verursachen. Gerade bei einer Dünnplattenproduktion stellen sich somit unschöne Verfärbungen an der Oberfläche (Wolkenbildung) oder sogar Dichteverschiebungen mit entsprechender Kerbwirkung in der Streugutmatte oder der Werkstoffplatte ein.
Bisherige Lösungen aus dem Stand der Technik bieten hierzu sogenannte Kammerfallschächte an, die über die Breite den Materialstrom in mehrere Teile/Bereiche aufteilen. Diese Vorrichtungen sind aber umständlich zu handhaben, verstopfen leicht und sind schwer zu reinigen ( DE-A 19916447 ).
Furthermore, experience and practice have shown that uncontrollable air turbulences occur in particular in the case of a relatively freely falling stream of material after the metering device, which is an unintentional one Area weight distribution across the width but also over the length cause. In the case of a thin-plate production in particular, unsightly discolorations on the surface (cloud formation) or even density changes with a corresponding notch effect thus appear in the spreading material mat or in the material plate.
Previous solutions from the prior art offer for this purpose so-called chamber chutes, which divide across the width of the material flow into several parts / areas. However, these devices are cumbersome to handle, clog easily and are difficult to clean ( DE-A 19916447 ).

Ein gattungsgemäße Verfahren und eine gattungsgemäße Anlage sind bereits aus der EP 0 292 581 A1 bekannt. Der Erfindung liegt die Aufgabe zugrunde ein Verfahren und eine Anlage zur Herstellung zumindest einer Schicht einer Streugutmatte zu generieren, in der auf schonende und einfache Art und Weise eine über die Breite der Streugutmatte und variables Flächengewicht eingestellt werden kann und/oder die Flächengewichtsverteilung über die Breite nach der Dosierung durch eine Dosiervorrichtung oder einer Leitvorrichtung gegenüber auftretenden Luftwirbeln verbessert werden kann. Insbesondere soll es möglich sein an den Längsrändern der Streugutmatte ein geringeres Flächengewicht als das Durchschnittsflächengewicht der Streugutmatte einzustellen, um die Materialmengen durch die Besäumung der Streugutmatte gering zu halten.A generic method and a generic system are already out of the EP 0 292 581 A1 known. The object of the invention is to generate a method and a plant for producing at least one layer of a spreading material mat in which a width of the spreading material mat and variable weight per unit area can be adjusted in a gentle and simple manner and / or the basis weight distribution over the width can be improved after dosing by a metering device or a guide device against occurring air vortices. In particular, it should be possible to set a lower weight per unit area than the average surface weight of the spreading material mat at the longitudinal edges of the spreading material mat in order to minimize the amount of material due to the trimming of the spreading material mat.

Diese Aufgabe löst die Erfindung für das Verfahren dadurch, dass mittels zumindest einer mechanischen Leitvorrichtung zwischen der Dosiervorrichtung und der Streuvorrichtung zumindest teilweise das Streugut im Materialstrom im Wesentlichen quer zur Produktionsrichtung des Formbandes verschoben und/oder dass zumindest teilweise das Streugut im Materialstrom in seiner Bewegung in Bewegungsrichtung stabilisiert wird, wobei die mechanische Leitvorrichtung mittels über die Breite verteilte Leitbleche nur teilweise den Materialstrom beeinflusst, indem die Leitbleche zur teilweisen Verschiebung des Streugutes über die Breite nur teilweise in der Länge in den Materialstrom hineinragen und winkelig zur Bewegungsrichtung des Materialstromes stehen.This object is achieved by the invention for the method in that by means of at least one mechanical guide device between the metering device and the scattering device at least partially displaced the material in the material flow substantially transversely to the production direction of the forming belt and / or that at least partially the material to be dispersed in the material flow in its movement Direction of movement is stabilized, wherein the mechanical guide device by means of distributed over the width baffles only partially influenced the flow of material by the baffles for partial displacement of the material spread over the width only partially extend in length in the material flow and are at an angle to the direction of movement of the material flow.

Die Lösung für eine Anlage besteht darin, dass zur zumindest teilweisen Verschiebung des Streugutes im Wesentlichen quer zur Produktionsrichtung des Formbandes im Materialstrom und/oder dass zur zumindest teilweise Stabilisierung des Streugut im Materialstrom in Bewegungsrichtung zwischen der Dosiervorrichtung des Bunkers und der Streuvorrichtung des Streukopfes zumindest eine mechanischen Leitvorrichtung angeordnet ist, wobei in der mechanischen Leitvorrichtung über die Breite verteilte Leitbleche zur teilweisen Beeinflussung des Materialstroms angeordnet sind, wobei die Leitbleche zur teilweisen Verschiebung des Streugutes über die Breite nur teilweise in der Länge in den Materialstrom hineinragen und winkelig zur Bewegungsrichtung des Materialstromes anstellbar sind.The solution for a system is that for at least partial displacement of the material to be spread substantially transversely to the production direction of the forming belt in the material flow and / or that at least partially stabilize the material to be spread in the material flow in the direction of movement between the metering of the bunker and the scattering device of the scattering head arranged in the mechanical guide device over the width distributed baffles for partially influencing the flow of material, the baffles for partial displacement of the material to be spread over the width only partially extend in length in the material flow and at an angle to the direction of movement of the material flow are.

Es ist mit der erfindungsgemäßen Lehre und Lösung nun möglich innerhalb eines Streukopfes die Schicht einer Streugutmatte oder eine einschichte Streugutmatte aus einem Streukopf hinsichtlich ihrer Flächengewichtsverteilung in der Breite gleichmäßig einzustellen. Dies gilt insbesondere für orientierbares und flächiges Streugut, insbesondere bei der Herstellung von orientiert gestreuten Platten (OSB). Es können aber auch Flächengewichtsverteilungen generiert werden, die es ermöglicht insbesondere Leichtbauplatten für den Möbelbau herzustellen, die überwiegend ein geringeres Flächengewicht aufweisen als in Bereichen, die für die Anordnung von Halteelementen (Einlegeböden, Schubladen, Türbeschläge, Rückwandhalterungen, ...) vorgesehen sind. Auch können entsprechende Kanten, die beispielsweise für eine Umleimung in der entsprechende Maserung/Farbe der Flächenseiten, vorgesehen sind, ebenfalls mit einem höheren Flächengewicht vorgesehen sein. Vorstellbar insbesondere als Kantenschutz oder zur verbesserten spanenden Einbringung einer Kantennut für Umleimer. Weiter kann es vorgesehen sein das genannte Flächengewicht auf das Dosierflächengewicht oberhalb des Streukopfes oder auf das durchschnittliche Streuflächengewicht und/oder auf das Streuflächengewicht ohne eine Beeinflussung durch die Leitvorrichtungen zu beziehen.It is now possible with the teaching and solution according to the invention within a scattering head to uniformly set the width of the layer of a spreading material mat or a layered spreading material mat from a scattering head in terms of its basis weight distribution. This applies in particular to orientable and flat spreading material, in particular in the production of oriented scattered boards (OSB). However, it is also possible to generate basis weight distributions, which in particular make it possible to produce lightweight panels for furniture construction, which predominantly have a lower basis weight than in areas which are provided for the arrangement of retaining elements (shelves, drawers, door fittings, rear wall brackets, etc.). Also, corresponding edges, which are provided for example for a gluing in the corresponding grain / color of the surface sides, also be provided with a higher basis weight. Conceivable in particular as edge protection or for improved machining introduction of an edge groove for lipping. Furthermore, it may be provided to refer to the weight per unit area to the metering surface weight above the scattering head or to the average surface weight and / or to the surface weight without being influenced by the guide devices.

Weiter ist es möglich eine Streugutmatte so zu streuen, dass die äußeren Längsränder in der Streuung, bzw. im Bereich der Streuköpfe ein niedriges Flächengewicht aufweisen, insbesondere als das Durchschnittsflächengewicht der Streugutmatte. Dies wird vorzugsweise dadurch erreicht, dass im fallenden Materialstrom Teile des Streugutes an den Randbereichen, quer über das Formband gesehen, während des Durchlaufes im Streukopf in Richtung der Mittenlängserstreckung des Formstranges respektive der Streugutmatte verschoben werden. Es ergibt sich, dass von einer Längsseite in Richtung der Mitte einer Streugutmatte betrachtet erst ein geringeres Flächengewicht in der Streugutmatte entsteht, dass von einem höheren Flächengewicht abgelöst und schließlich in das Durchschnittsflächengewicht der Streugutmatte übergeht. Wird diese Streugutmatte nun besäumt, vorzugsweise am eingestellten Höhepunkt des höheren Flächengewichts (Peak), erhält man in vorteilhafter Weise eine möglichst geringe an besäumten Material aber dennoch eine Streugutmatte mit einer gewünschten Flächengewichtserhöhung in den Randbereichen längs.It is also possible to sprinkle a grit mat so that the outer longitudinal edges in the scattering, and in the area of the scattering heads a low Have basis weight, in particular as the average basis weight of the grit mat. This is preferably achieved in that, in the falling material flow, parts of the material to be spread on the edge regions, viewed transversely over the forming belt, are displaced during the passage in the spreading head in the direction of the central longitudinal extent of the molding strand or of the spreading material mat. It turns out that viewed from a longitudinal side in the direction of the center of a grit mat only a lower basis weight arises in the grit mat, that detached from a higher basis weight and finally merges into the average surface weight of the grit mat. If this grit mat is now trimmed, preferably at the set peak of the higher basis weight (peak), advantageously the smallest possible trimmed material but nevertheless a grit mat with a desired weight increase in the edge regions is obtained longitudinally.

Hinsichtlich der verwendeten Begrifflichkeiten in vorliegender Erfindung werden folgende Festlegungen getroffen:
Eine mögliche Leitvorrichtung beeinflusst vorzugsweise nicht den ganzen fallenden oder in den Streukopf einzuführenden Materialstrom, sondern nur einen Teil davon. Dies ist notwendig, um extensive Streulücken in der Streugutmatte zu vermeiden. Auch wird durch die Leitvorrichtung nicht, wie bei einer Breitenverstellung üblich, die Streubreite der Streugutmatte justiert, sondern es werden vorzugsweise nur Teile des Materialstromes verschoben oder umgeleitet um eine unterschiedliche Flächengewichtsverteilung über die Breite der Streugutmatte zu erreichen. Dies kann mit einer oder mehreren Leitvorrichtungen durchgeführt werden. Der Begriff "Dosierflächengewicht" beschreibt das theoretische Flächengewicht eines Materialstromes, der entsteht wenn eine Dosiervorrichtung Streugut kontrolliert über die Breite B1 austrägt um es in einen Streukopf zu überführen und es dort auf einem Formband der Breite B abgelegt wird. Bevorzugt ist B>B1, was aber nicht zwingend ist. Der Materialstrom weist in Produktionsrichtung/Bewegungsrichtung des Formbandes eine Tiefe der Länge L auf. Das Streuflächengewicht beschreibt das Flächengewicht der Streugutmatte über die Breite des Formbandes mit einer Breite B2. Werden keine Veränderungen durch den Streukopf oder andere Vorrichtungen an dem Dosierflächengewicht vorgenommen, entspricht das Dosierflächengewicht dem Streuflächengewicht. Wird die Streugutmatte besäumt, erhält diese durch die Besäumung eine neue Breite B3, wobei gilt: B3<B2.
Als Streuvorrichtung im Streukopf ist die Vorrichtung zur gezielten Ablage des Streugutes auf dem Formband bezeichnet. Diese findet sich vorzugsweise direkt über dem Formband und hat als letztes mechanisches, insbesondere bewegtes, Maschinenelement Kontakt mit dem Streugut bevor es den Streukopf verlässt und auf dem Formband respektive der Streugutmatte zu liegen kommt.
With regard to the terminology used in the present invention, the following definitions are made:
A possible guiding device preferably does not influence the entire falling material stream or material stream to be introduced into the scattering head, but only a part thereof. This is necessary to avoid extensive gaps in the spreading material mat. Also is not adjusted by the guide device, as usual in a width adjustment, the spread of the grit mat, but only parts of the material stream are preferably moved or diverted to achieve a different basis weight distribution over the width of the grit mat. This can be done with one or more guiding devices. The term "metering surface weight" describes the theoretical basis weight of a material flow which occurs when a metering device discharges scattered material across the width B1 in order to transfer it to a spreading head and deposit it there on a forming belt of width B. Preferably, B> B1, which is not mandatory. The material flow has a depth of length L in the direction of production / direction of movement of the forming belt. The scattered surface weight describes the weight per unit area of the spreading material mat across the width of the forming belt with a width B2. If no changes are made by the spreading head or other devices on the Dosierflächengewicht, the Dosierflächengewicht corresponds to the Streuflächengewicht. If the grit mat is trimmed, this is replaced by the trimming a new width B3, where B3 <B2.
As a scattering device in the scattering head, the device for the targeted storage of the material to be spread on the forming belt is designated. This is preferably found directly above the forming belt and has as the last mechanical, in particular moving, machine element contact with the spreading material before it leaves the spreading head and comes to rest on the forming belt respectively the spreading material mat.

Insbesondere ist nun vorgesehen, dass durch die Leitvorrichtung das im Wesentlichen gleichmäßige Dosierflächengewicht DFG des Materialstromes in ein differenziertes Streuflächengewicht SFG verändert wird, wobei unter einem differenzierten Streuflächengewicht SFG eine Kontur zu verstehen ist, die verschiedene Formen aufweisen kann, wie nachstehend noch näher beschrieben wird. Dabei kann die Stabilisierung und/oder die Verschiebung des Streugutes im Materialstrom in mehreren Stufen mit aufeinanderfolgenden Leitvorrichtungen durchgeführt wird. Eine Stabilisierung kann notwendig sein, wenn, insbesondere flächiges respektive orientierbares Streugut durch seine Bewegung Luftwirbel erzeugt, die zu einer Verschiebung des Streugutes in Längs- oder in Querrichtung des Formbandes führen können.
Vorzugsweise wird die Stabilisierung und/oder die Verschiebung vor Eintritt des Materialstromes in den Streukopf und/oder vor dem ersten Kontakt des Materialstromes mit einem bewegten Maschinenelement des Streukopfes durchgeführt. Das Streugut sollte vorzugsweise in einer Breite B2 auf das Formband zu einer Streugutmatte gestreut werden, die im Wesentlichen der Breite B1 des Materialstromes nach der Dosiervorrichtung entspricht.
Auch ist bevorzugt, dass mittels der Leitvorrichtung in dem Streuflächengewicht SFG über die Breite B2 zumindest ein erster Bereich mit einem höheren Flächengewicht FH als das Dosierflächengewicht DFG und angrenzend zumindest einen weiteren Bereich mit einem geringeren Flächengewicht FG, insbesondere als das Dosierflächengewicht DFG, eingestellt wird. Dies wird inbesondere vorgesehen, wenn Leichtbauplatten im Möbelbau produziert werden sollen. Hierzu können im (differenzierten) Streuflächengewicht SFG über die Breite B2 mehrere Bereiche mit höherem Flächengewicht FH und dazwischen liegenden Bereichen geringeren Flächengewichts FG derart angeordnet werden, dass die Bereiche mit höherem Flächengewicht FH im weiteren Verlauf nach der Presse als Trennebene zur Aufteilung der verpressten Werkstoffplatte und/oder als Bereiche zur Anbringung von Befestigungsmitteln oder Beschlägen im Möbelbau Verwendung finden können.
In einer Alternativen oder zusätzlichen Ausführungsform kann an den Längsrändern der Streugutmatte ein im Wesentlichen geringeres Flächengewicht FG als das Dosierflächengewicht DFG eingestellt werden, um die Menge des an der Besäumvorrichtung anfallenden Streuguts gering zu halten.
Bevorzugt wird die Streugutmatte zwischen dem Streukopf und der Presse mittels einer Besäumvorrichtung an den Längsrändern auf eine Breite B3 mit Längsrändern zugeschnitten, wobei die Längsränder in Bereichen mit einem höheren Flächengewicht FH als das Dosierflächengewicht DFG angeordnet sein können. Bevorzugt wird als mechanische Leitvorrichtung zmindest ein zwischen der Dosiervorrichtung und der Streuvorrichtung angeordnetes, vorzugsweise mittels zumindest einer Stellvorrichtung beweg- und/oder verschwenkbares Leitblech zumindest teilweise in das in Bewegungsrichtung fallende Streugut gehalten. Zusätzlich oder alternativ kann zur Vermeidung von unkalkulierbaren Querströmungen das Streugut zumindest teilweise zwischen Bunker und Streukopf im Wesentlichen in Fallrichtung entlang einer Leitklappe geführt wird, wobei die Leitklappe ebenfalls im Winkel zum Streugut respektive zum Materialstrom verstellbar angeordnet werden kann. In speziellen Fällen kann es sinnvoll sein, dass eine darstellende Kurve des Streuflächengewichts SFG über die Breite B2 bezogen auf die geometrischen Mitte der Breite B2 eine, vorzugsweise achsenbezogene, Symmetrie aufweist.
Bei aufwendigeren gestalteten Streuköpfen kann es sinnvoll sein, das Streugut mittels der Leitklappe auf zumindest eine zwischen der Leitklappe und der Streuvorrichtung angeordnete Auflösevorrichtung aufzugeben. Zur verbesserten und/oder automatisierten Einstellung der Verfahrensparameter, insbesondere bei unterschiedlichen Produktionschargen, kann es sinnvoll sein, die Leitklappe und/oder zumindest ein Leitblech, die über die Breite des Formbandes angeordnet sind und zur Stabilisierung und/oder Beeinflussung des Dosierflächengewichts DFG in Ihrer Lage zum in Fallrichtung bewegten Streugut und/oder zum Formband und/oder zu den Seitenwänden des Streukopfes mittels Stellvorrichtungen zu verstellen. Besonders bevorzugt werden die Leitbleche in ihrer Ausrichtung in Produktionsrichtung des Formbandes in der Länge L des Materialstromes 24 im Wesentlichen 10% bis 80%, vorzugsweise zwischen 30% und 50%, eingeführt. Das präventiert in sinnvoller und praktischer Art und Weise Verstopfungen im Fallbereich und sogenannte Streulöcher in der Streugutmatte.
In particular, it is now provided that the substantially uniform Dosierflächengewicht DFG of the material flow is changed by the guide into a differentiated Streuflächengewicht SFG, wherein a differentiated Streuflächengewicht SFG is to be understood a contour that may have different shapes, as will be described in more detail below. In this case, the stabilization and / or the displacement of the material to be spread in the material flow is carried out in several stages with successive guide devices. A stabilization may be necessary if, in particular flat or orientable grit produced by its movement air vortex, which can lead to a shift of the material to be spread in the longitudinal or transverse direction of the forming belt.
The stabilization and / or the displacement is preferably carried out before the material flow enters the scattering head and / or before the first contact of the material flow with a moving machine element of the scattering head. The grit should preferably be scattered in a width B2 on the forming belt to a grit mat, which corresponds substantially to the width B1 of the material flow after the metering device.
It is also preferred that at least one first area with a higher basis weight FH than the dosing area weight DFG and adjoining at least one further area with a lower basis weight FG, in particular as the dosing area weight DFG, by means of the guide device in the area weight SFG over the width B2, is set. This is especially provided when lightweight panels are to be produced in furniture. For this purpose, in the (differentiated) scatter surface weight SFG over the width B2 several areas with higher basis weight FH and intermediate areas lower basis weight FG be arranged such that the areas with higher basis weight FH in the course after the press as parting plane for splitting the compressed material plate and / or as areas for attachment of fasteners or fittings in furniture can be used.
In an alternative or additional embodiment, a substantially lower basis weight FG than the metering surface weight DFG can be set at the longitudinal edges of the spreading material mat in order to minimize the amount of material to be spread on the trimming device.
Preferably, the spreading material mat is cut between the spreading head and the press by means of a trimming at the longitudinal edges to a width B3 with longitudinal edges, wherein the longitudinal edges can be arranged in areas with a higher basis weight FH than the Dosierflächengewicht DFG. Preferably, at least one baffle arranged between the dosing device and the spreader, preferably movable and / or pivotable by means of at least one adjusting device, is held at least partially in the spreading material falling in the direction of movement as a mechanical guide device. Additionally or alternatively, to avoid of incalculable cross flows the grit is at least partially guided between bunker and scattering head substantially in the direction of fall along a guide flap, wherein the guide flap can also be arranged at an angle to the grit respectively to the material flow adjustable. In special cases, it may be useful for an illustrative curve of the scatter surface weight SFG over the width B2 to have a preferably axis-related symmetry relative to the geometric center of the width B2.
With more elaborate designed scattering heads, it may be useful to abandon the spreading material by means of the guide flap on at least one arranged between the guide flap and the scattering device dissolving device. For improved and / or automated adjustment of the process parameters, in particular for different production batches, it may be useful to the guide flap and / or at least one baffle, which are arranged across the width of the forming belt and for stabilizing and / or influencing the Dosierflächengewichts DFG in your position to adjust the spreading material moved in the direction of fall and / or to the forming belt and / or to the side walls of the scattering head by means of adjusting devices. Particularly preferably, the baffles are introduced in their orientation in the production direction of the forming belt in the length L of the material flow 24 substantially 10% to 80%, preferably between 30% and 50%. That is pre-voted in a meaningful and practical way blockages in the case area and so-called stray holes in the spreading material mat.

Die Anlage ist für sich alleine eigenständig und kann alleinstehend mit den beschriebenen Merkmalen verwendet werden. Gleichzeitig ist die Anlage aber auch insbesondere für die Durchführung des Verfahrens nach Anspruch 1 geeignet.The system is independent on its own and can be used alone with the features described. At the same time, however, the system is also suitable in particular for carrying out the method according to claim 1.

Weitere vorteilhafte Maßnahmen und Ausgestaltungen des Gegenstandes der Erfindung gehen aus den Unteransprüchen und der folgenden Beschreibung mit der Zeichnung hervor.Further advantageous measures and embodiments of the subject matter of the invention will become apparent from the dependent claims and the following description with the drawing.

Es zeigen:

Figur 1
eine erfindungsgemäße Anlage, bestehend aus einem über einem Formband angeordneten Streukopf mit zugehörigem Bunker und dazwischen angeordneter Leiteinrichtung für das Streugut in zwei schematischen und korrespondierenden Ansichten,
Figur 2
eine Darstellung möglicher Flächengewichte über die Breite eines Formbandes in einer gestreuten Streugutmatte respektive bezogen auf das Flächengewicht einer Dosiervorrichtung eines Bunkers,
Figur 3
einen Schnitt in Draufsicht durch die Leitvorrichtung nach Figur 1 mit parallel zur Fallrichtung stehenden Leitblechen zur Stabilisierung eines Materialstroms aus Streugut,
Figur 4
eine Draufsicht auf den Bereich des Formstranges zwischen Streustation und Presse mit Darstellung der unterschiedlichen Breiten B, B1, B2, B3 und einer Besäumvorrichtung,
Figur 5
eine Darstellung einer einstellbaren Flächengewichtsverteilung über die Breite B3 einer besäumten Streugutmatte zur Verpressung in einer Presse,
Figur 6
eine Darstellung einer einzustellenden Flächengewichtsverteilung bezogen auf das Streuflächengewicht der zu streuenden Streugutmatte nach Figur 3 über die Breite B2 unter einem Streukopf,
Figur 7
eine Darstellung in Seitenansicht der möglichen Einstellung der Leitvorrichtung respektive der Leitbleche zur Erzielung der Flächengewichtsverteilungen über die Breite B2 nach den Figuren 5 und 6 bei einer Breite B1 des Dosierflächengewichts DFG und
Figur 8
eine Draufsicht nach Figur 7 zur Darstellung der Eintauchtiefe der Leitvorrichtung respektive der Leitbleche in den Materialstrom einer Länge L in und einer Breite B1 quer zur Produktionsrichtung,
Figur 9
eine Darstellung einer erweiterten Anordnung von zwei in Bewegungsrichtung des Materialstromes aufeinander folgenden Leitvorrichtungen in einer komplexeren Ausgestaltung, wobei die obere Leitvorrichtung zur Veränderung der Flächengewichtsverteilung und die untere Leitvorrichtung zur Stabilsierung der neu eingestellten Flächengewichtsverteilung dient,
Figur 10
eine Darstellung eines Teils einer Leitvorrichtung mit einer möglichen Anordnung eines Leitbleches mit zugehöriger Stellvorrichtung zur Einstellung unterschiedlicher Winkel des Leitbleches in zwei korrespondierenden schematischen Ansichten und
Figur 11
eine mögliche Verstellvorrichtung miteinander verbundener Leitbleche mittels zwei bewegbaren Schubstangen.
Show it:
FIG. 1
a plant according to the invention, consisting of a scattering head arranged above a forming belt with associated bunker and guide device for the spreading material arranged therebetween in two schematic and corresponding views,
FIG. 2
a representation of possible basis weights across the width of a forming belt in a scattered grit mat respectively based on the basis weight of a metering device of a bunker,
FIG. 3
a section in plan view through the guide after FIG. 1 with guide plates parallel to the direction of fall to stabilize a material flow from grit,
FIG. 4
a plan view of the region of the molding strand between scattering station and press with representation of the different widths B, B1, B2, B3 and a trimming device,
FIG. 5
a representation of an adjustable basis weight distribution over the width B3 of a trimmed spreading material mat for pressing in a press,
FIG. 6
a representation of a surface weight distribution to be adjusted based on the Streuflächengewicht the scattering mat to be scattered after FIG. 3 over the width B2 under a scattering head,
FIG. 7
a representation in side view of the possible setting of the guide device or the baffles to achieve the basis weight distributions over the width B2 after the FIGS. 5 and 6 at a width B1 of the Dosierflächengewichts DFG and
FIG. 8
a top view FIG. 7 for illustrating the immersion depth of the guide device or the guide plates in the material flow of a length L in and a width B1 transversely to the production direction,
FIG. 9
a representation of an expanded arrangement of two successive in the direction of movement of the material flow guide devices in a more complex configuration, wherein the upper guide device for changing the basis weight distribution and the lower guide device for stabilizing the newly adjusted basis weight distribution,
FIG. 10
an illustration of a part of a guide device with a possible arrangement of a guide plate with associated adjusting device for setting different angles of the guide plate in two corresponding schematic views and
FIG. 11
a possible adjusting device interconnected baffles by means of two movable push rods.

In Figur 1 ist auf der linken Seite in schematischer Ansicht eine beispielhafte Anlage zur Herstellung einer Streugutmatte 7 zur Verpressung in einer Presse 22 dargestellt. Auf der rechten Seite findet sich eine Seitenansicht gemäß der Schnittlinie der linken Darstellung. In der Anlage wird Streugut 9 in einen Bunker 2 eingetragen und mittels einer Rückstreifvorrichtung 25 und darunter liegendem, endlos umlaufenden Bunkerbodenband 16 kontrolliert einer Dosiervorrichtung 15 zugeführt. Die Dosiervorrichtung 15 trägt das Streugut über eine Breite B1 mit einem gleichmäßigen Dosierflächengewicht DFG (rechte Darstellung unten) aus. In Bewegungsrichtung 12, entspricht üblicherweise der Fallrichtung des Streugutes 9, bildet sich somit ein im wesentlichen in Richtung des Streukopfes 1 bewegter Materialstrom 24 mit einer Breite B1 quer und einer Länge L in Produktionsrichtung 11 (entspricht der Bewegungsrichtung des Formbandes 8) aus. Dabei passiert der Materialstrom 24 zumindest eine mechanische Leitvorrichtung 5 zur Stabilisierung des im Materialstrom 24 bewegten Streugutes 9 und/oder zur Einstellung eines gegenüber dem über die Breite B1 vorhandenen Dosierflächengewichts DFG differierenden bzw. ungleichmäßigen Streuflächengewichts SFG über die Breite B2 der Streugutmatte 7 respektive des Formbandes 8. Besonders bevorzugt ist, dass die Leitvorrichtung 5 zur Stabilisierung und/oder Verschiebung des Streugutes 9 im Materialstrom 24 im Wesentlichen nach der Dosiervorrichtung 15 und vor Eintritt des Materialstromes 24 in den Streukopf 1 und/oder vor dem ersten Kontakt des Materialstromes 24 mit einem bewegten Maschinenelement (bspw. Auflösewalzen, Siebe oder dgl.) des Streukopfes 1 angeordnet ist. Zur Einstellung des Übergabeortes des Materialstromes 24 an oder in den Streukopf 1 kann eine Leitklappe 18 mit optionalen mechanischen oder automatischen Stellvorrichtungen (nicht dargestellt) angeordnet sein. Die Leitklappe 18 ist dabei über die ganze Breite des Formbandes 8 und/oder des Streukopfes 1, zumindest über die Breite B1 des Streugutes 9 nach der Dosiervorrichtung 15 angeordnet. Wie in der rechten Zeichnung der Figur 1 dargestellt, sind über die Breite zwei Leitbleche 10 "auf" einem optionalen Leitblech 18 angeordnet, die durch ihre winkelige Anordnung und ihren nur teilweisen Eingriff in die Länge L des Materialstromes 24 (linke Darstellung) eine Verschiebung von Teilen des Streugutes 9 des Materialstromes 24 während des Vorbeifallens oder -fließens bewirken, so dass sich aus einem gleichmäßigen Dosierflächengewicht DFG (rechte Darstellung unten) eine ungleichmäßige Kontur des Streuflächengewichts SFG innerhalb der Streugutmatte 7 auf dem Formband 8 ergibt. Dadurch, dass die mechanische Leitvorrichtung 5 nur partiell in den Materialstrom 24 eintaucht bleibt noch genügend Streugut 9 unverschoben vorhanden um für eine Bedeckung des Formbandes 8 zu sorgen, so dass keine Unterstreuung oder "leere Flecken" in der Streugutmatte 7 entstehen können.
In dem Streukopf 1 können eine oder mehrere Auflösevorrichtungen 4 für das Streugut 9 angeordnet werden, vorzugsweise sind diese zwischen der Leitklappe 18 und der Streuvorrichtung 14 angeordnet.
Mit einer weiteren Leitvorrichtung 6, die gleich der Leitvorrichtung 5 ausgeführt sein kann, zwischen der Auflösevorrichtung 4 und der Streuvorrichtung 14 kann die Wirkung für eine seitliche Einstellung des Flächengewichts entlang der Längsränder 17 der Streugutmatte 7 weiter verstärkt werden. Auch hier ist die Leitvorrichtung 6 nicht als seitliche Einstellvorrichtung für die Breite B2 zu verstehen, sondern bewirkt nur die Verschiebung eines weiteren Teiles des Streugutes 9, da die "theoretische Tiefe" L sich nun über einen längeren Bereich erstreckt und die Leitvorrichtung 6 nur einen Teil davon einnimmt. Dies ist insbesondere sinnvoll zur Erstellung eines starken Abfalles des Streuflächengewichts SFG an den Längsrändern 17 der Streugutmatte 7 zur Unterschreitung des durchschnittlichen Streuflächengewichts der Streugutmatte 7 über die Breite B2 und/oder des Dosierflächengewichts der Dosiervorrichtung 15 über die Breite B1.
In FIG. 1 on the left side in an schematic view of an exemplary plant for producing a grit mat 7 for pressing in a press 22 is shown. On the right side there is a side view according to the section line of the left illustration. In the plant grit 9 is registered in a bunker 2 and controlled by means of a back stripping device 25 and underlying, endlessly circulating bunker bottom belt 16 a metering device 15 is supplied. The metering device 15 carries the grit over a width B1 with a uniform Dosierflächengewicht DFG (right representation below). In the direction of movement 12, usually corresponds to the falling direction of the scattering material 9, thus forming a substantially in the direction of the scattering head 1 moving material flow 24 with a width B1 across and a length L in the production direction 11 (corresponds to the direction of movement of the forming belt 8). In this case, the material flow 24 passes through at least one mechanical guide device 5 for stabilizing the material 9 moving in the material to be spread 9 and / or for setting a comparison with the existing over the width B1 Dosierflächengewichts DFG differing or uneven Streuflächengewichts SFG across the width B2 of the spreading material mat 7 respectively of the forming belt 8. It is particularly preferred that the guide device 5 for stabilizing and / or displacement of the scattering material 9 in the material flow 24 substantially after the metering device 15 and before the material flow 24 in the scattering head 1 and / or before the first contact of the material flow 24 with a Moving machine element (eg opening rollers, screens or the like.) Of the scattering head 1 is arranged. To set the transfer location of the material flow 24 on or in the scattering head 1, a guide flap 18 with optional mechanical or automatic adjusting devices (not shown) may be arranged. The guide flap 18 is arranged over the entire width of the forming belt 8 and / or the scattering head 1, at least over the width B1 of the scattering material 9 after the metering device 15. As in the right drawing of the FIG. 1 represented, over the width of two baffles 10 "on" an optional baffle 18 are arranged by their angular arrangement and their only partial engagement in the length L of the material flow 24 (left) a shift of parts of the material to be spread 9 of the material flow 24th effect during the Vorbeifallens or -flowing, so that results from a uniform Dosierflächengewicht DFG (right representation below) an irregular contour of the scattering surface weight SFG within the grit mat 7 on the forming belt 8. Due to the fact that the mechanical guide device 5 only partially dips into the material flow 24, there remains sufficient scattered material 9 in an unobstructed manner to ensure that the forming belt 8 is covered, so that no underscattering or "empty spots" in the spreading material mat 7 can occur.
In the scattering head 1, one or more dissolving devices 4 can be arranged for the grit 9, preferably, these are arranged between the guide flap 18 and the scattering device 14.
With a further guide device 6, which may be the same as the guide device 5, between the opening device 4 and the scattering device 14, the effect for a lateral adjustment of the basis weight along the longitudinal edges 17 of the spreading material mat 7 can be further enhanced. Again, the guide 6 is not to be understood as a lateral adjustment for the width B2, but only causes the displacement of another part of the material 9, since the "theoretical depth" L now extends over a longer range and the guide 6 only a part of it occupies. This is particularly useful for producing a large drop in the scattered surface weight SFG at the longitudinal edges 17 of the spreading material mat 7 for falling below the average surface weight of the spreading material mat 7 across the width B2 and / or the Dosierflächengewichts the metering device 15 across the width B1.

In Figur 2 sind verschiedenen Flächengewichtsverteilungen über die Breiten B1, B2 und B3 dargestellt. Diese befassen sich hier speziell mit den Flächengewichtsverteilungen an den Längsrändern 20 und 17 der Streugutmatte 7. In der untersten Darstellung findet sich eine herkömmliche Streugutmatte nach dem Stand der Technik, die über eine Breite B1 dosiert und mittels seitlicher Schiebewände vollständig (bezogen auf den Materialstrom) von einer Fallbreite 21 auf eine Breite B2 der Streugutmatte verringert wurde. Es ergibt sich ein (steiler) Anstieg des randseitigen Flächengewichts in der ursprünglich gestreuten Streugutmatte 7 an den Längsrändern 17. Anschließend wird aufgrund der Besäumung ein hoher Anteil an Streugut 9 durch die abgetrennten Bereiche mit dieser Überhöhung wieder entfernt, wenn die Streugutmatte auf die Breite B3 reduziert wird. Die beiden oberen Darstellungen zeigen eine Randstreuung mit einem kurvigen Randverhalten, so dass am Trennschnitt durch die Besäumvorrichtung 23 vorzugsweise ein Maximum des randseitigen Streuflächengewichts SFG an dem neuen Längsrand 20 entsteht. Bei der oberen Darstellung entspricht die Fallbreite 21 (des Materialstroms 24) der Breite B2 der Streugutmatte, in der mittleren Darstellung wird ein höherer Hügel an den Randbereichen zur Besäumung erreicht, weil entweder die Leitbleche 10 beispielsweise tiefer in den Materialstrom eintauchen und/oder über die seitlichen Schiebewände (nicht dargestellt) die Fallbreite 21 des Materialstroms auf eine Breite B1 der Streugutmatte 7 verringert wird und somit an den Randbereichen mehr Material abgestreut wird. Zum besseren Vergleich ist das Dosierflächengewicht nach B1 eingezeichnet, wenn das Streugut 9 unbeeinflusst in seiner Flächengewichtsverteilung auf dem Formband 8 abgelegt werden würde.In FIG. 2 different basis weight distributions over the widths B1, B2 and B3 are shown. These are specifically concerned here with the basis weight distributions at the longitudinal edges 20 and 17 of the spreading material mat 7. The bottom diagram shows a conventional spreading material mat according to the prior art, which dosed over a width B1 and by means of lateral sliding walls completely (based on the material flow) was reduced from a fall width 21 to a width B2 of the grit mat. This results in a (steeper) increase of the marginal weight per unit area in the originally scattered grit mat 7 at the longitudinal edges 17. Subsequently, a high proportion of grit 9 is removed again due to the trimming by the separated areas with this elevation when the grit mat on the width B3 is reduced. The two upper representations show an edge scattering with a curvy edge behavior, so that a maximum of the edge-side scatter surface weight SFG at the new longitudinal edge 20 preferably results at the separating cut by the trimming device 23. In the upper illustration, the fall width 21 (of the material flow 24) corresponds to the width B2 of the spreading material mat, in the middle representation, a higher hill is achieved at the edge regions for trimming because either the baffles 10, for example, immerse deeper in the material flow and / or on the lateral sliding walls (Not shown) the fall width 21 of the material flow is reduced to a width B1 of the grit mat 7 and thus more material is scattered at the edge regions. For a better comparison, the metering surface weight according to B1 is shown if the spreading material 9 would be deposited unaffected in its basis weight distribution on the forming belt 8.

Figur 3 zeigt einen Schnitt in Draufsicht durch die Leitvorrichtung 5 nach Figur 1 mit parallel zur Fallrichtung stehenden Leitblechen 10 an einer Leitklappe 18 zur Stabilisierung des Materialstroms 24 einer Länge L und einer Breite B1 aus Streugut 9 während des Übertritts vom Bunker 2 in den Streukopf 1. Dies hat den Hintergrund, dass eine Stabilisierung des fallenden Streugutes durchaus von Vorteil ist. Weiter bildet sich zwischen den nur teilweise in den Materialstrom 24 reichenden Leitblechen 10 keine Verstopfungsgefahr aus wie es aus dem Stand der Technik mit variablen bzw. mehreren über die Breite angeordneten geschlossenen Fallrutschen/- schächten der Fall ist.
Die Anordnung von mehreren Leitblechen in einer Art Warteposition kann insoweit positiv sein, als es verschiedene Lösungen gibt um die Streubreite zu verstellen. Wird nun die Streubreite beispielsweise von 3 m auf 2,5 oder 2 m verringert könnten die genannten Leitbleche 10 nicht weit genug nach innen bewegt werden um dennoch das Verfahren durchzuführen. Aus diesem Grunde ist es von Vorteil mehrere Leitbleche über die Breite anzuordnen um in der Breiteneinstellung möglichst variabel zu sein. Im Übrigen kann durchaus eine übliche Breitenverstellung, also seitliche Leitbleche über die gesamte Länge des Streukopfes verwirklicht sein. In diesem Fall könnten in vorteilhafter Weise mit mehreren Leitblechen mehr Material in Richtung Mitte der Breite des Formbandes verschoben werden, so dass sich dennoch das gewünschte Profil ausbildet.
FIG. 3 shows a section in plan view through the guide 5 after FIG. 1 with parallel to the direction of fall baffles 10 on a guide flap 18 for stabilizing the material flow 24 of a length L and a width B1 of grit 9 during the passage from the bunker 2 in the scattering head 1. This has the background that a stabilization of the falling material to be scattered by Advantage is. Further forms between the only partially in the material flow 24 reaching baffles 10 no risk of clogging as it is the case from the prior art with variable or more over the width arranged closed slide down slides / -.
The arrangement of several baffles in a kind of waiting position can be positive insofar as there are different solutions to adjust the spread. If, for example, the spreading width is reduced from 3 m to 2.5 or 2 m, said baffles 10 could not be moved inwards far enough to nevertheless carry out the method. For this reason, it is advantageous several baffles across the width to be arranged in order to be as variable as possible in the width setting. Incidentally, quite a conventional width adjustment, so lateral baffles over the entire length of the scattering head can be realized. In this case, more material could be displaced in the direction of the middle of the width of the forming belt advantageously with a plurality of baffles, so that the desired profile nevertheless forms.

Figur 4 zeigt eine Draufsicht auf den Bereich des Formstranges zwischen dem Streukopf 1 und der Presse 22 mit Darstellung der unterschiedlichen Breiten, wie der Breite B des Formbandes 8, der Breite B1 des Dosierflächengewichts DFG respektive des Materialstromes 24, der Breite B2 der Streugutmatte 7 respektive des Streuflächengewichts SFG, und der Breite B3 einer zur Verpressung bereiten und besäumten Streugutmatte 7 in Produktionsrichtung 11 nach einer Besäumvorrichtung 23. FIG. 4 shows a plan view of the region of the molding strand between the scattering head 1 and the press 22 showing the different widths, such as the width B of the forming belt 8, the width B1 of the Dosierflächengewichts DFG respectively of the material flow 24, the width B2 of the grit material 7 respectively of the Streuflächengewichts SFG, and the width B3 of a prepared for pressing and trimmed grit mat 7 in the production direction 11 after a Besäumvorrichtung 23rd

Die Figuren 5 bis 8 zeigen eine zusammenhängende Darstellung eines möglichen Herstellungsverfahrens einer Streugutmatte 7 mit beispielhaften Parametern. Die Darstellung ist in Reihenfolge der Figuren entgegengesetzt zum Materialfluss der Produktion zu erarbeiten, da Figur 5 die bereits zur Verpressung geeignete und besäumte Streugutmatte 7 mit den Längsrändern 20 und einer Breite B3, Figur 6 die unbesäumte Streugutmatte und die Figuren 7 und 8 die Verschiebung des fallenden Streugutes mittels der Leitvorrichtung 5 darstellen. Die Streugutmatte 7 weist gegenüber dem gleichmäßigen Dosierflächengewicht eine ungleichmäßige Kontur des Streuflächengewichts SFG über die Breite B3 auf, wobei Orte höheren Flächengewichts FH sich mit Bereichen geringerem Flächengewichts FG abwechseln. Die verwendete Anzahl an Leitblechen für ein höheres und/oder niedrigeres Flächengewicht FG kann auch mehr als eins betragen, wie insbesondere die Figuren 7 und 8 darstellen. An den Längsrändern findet sich die zur Verpressung gewünschte Flächengewichtserhöhung des Streuflächengewichts SFG.
Figur 6 zeigt die Streugutmatte in der originalen Breite B2 nach und während der Streuung mit den Längsrändern 17.
Korrespondierend hierzu zeigt Figur 7 die hierzu notwendige Einstellung der Leitvorrichtung 5 zur Beeinflussung des Dosierflächengewichts DFG über die Breite B1 zur Herstellung eines Streuflächengewichts SFG über die Breite B2. Hierzu stehen die Leitbleche 10 winkelig zur Bewegungsrichtung 12 des Materialstroms 24 aus Streugut 9.
Figur 8 stellt abschließend dar, dass die Leitbleche 10 nur teilweise in den Materialstrom 24 einer Tiefe respektive der Länge L hineinragen und für eine teilweise Verschiebung des Streugutes 9 des Materialstromes 24 über die Breite B1 sorgen.
Figur 9 zeigt für eine komplexere Verfahrensanwendung respektive zur Feineinstellung eine mehrfache Anordnung der Leitvorrichtung, bestehend aus einer Leitvorrichtung 5 und in Bewegungsrichtung 12 des Materialstromes nachgeordneten Leitvorrichtung 5'. Die erste Leitvorrichtung 5 dient zur Verschiebung des Streugutes 9 über die Breite B1, wobei die zweite Leitvorrichtung 5' zur Stabilisierung und zur nachfolgenden Vergleichmässigung des in Bewegungsrichtung 12 bewegten Materialstromes 24 angeordnet ist. Die Leitvorrichtung 5' führt somit zu einer Feineinstellung der Verschiebung des Streugutes 9 indem die Leitvorrichtung 5' ein zu "weites" Auswandern/Verschieben des Streugutes 9 verhindert.
In Figur 10 findet sich eine Darstellung eines Teils einer Leitvorrichtung 5 mit einer möglichen Anordnung eines Leitbleches 10 mit zugehöriger Stellvorrichtung 19 zur Einstellung unterschiedlicher Winkel des Leitbleches 10 in zwei korrespondierenden schematischen Ansichten. Das Leitblech 10 kann mittels der Stellvorrichtungen 19 im Abstand zur Leitklappe 18 verändert und durch den Durchbruch 27 verschoben werden und verändert dementsprechend die Eindringtiefe in den Materialstrom 24. Um winkelige Einstellungen des Leitbleches 10 zum Materialstrom 24 einstellen zu können, weisen die Leitbleche 10 Nuten 26 auf in die die Leitklappe 18 durchtritt, wenn das Leitblech 10 um die Drehachse 28 mittels der Stellvorrichtung 19 verdreht wird.
Figur 11 zeigt eine mögliche Verstellvorrichtung 19 für miteinander mittels Schubstangen 29 verbundener Leitbleche 10. Die Leitbleche 10 sind alternierend mit verschiedenen Schubstange 29 verbunden, so dass bei Bewegung einer Schubstange 29 jedes zweite Leitblech 10 in der Richtung der Schubstange 29 bewegt wird.
The FIGS. 5 to 8 show a coherent representation of a possible manufacturing process of a grit mat 7 with exemplary parameters. The representation is to be worked out in order of the figures opposite to the material flow of the production, since FIG. 5 the already suitable for pressing and trimmed grit mat 7 with the longitudinal edges 20 and a width B3, FIG. 6 the unedged grit mat and the FIGS. 7 and 8 represent the displacement of the falling material to be spread by means of the guide 5. The grit mat 7 has over the uniform metering surface weight on a non-uniform contour of the scattering surface weight SFG over the width B3, with places higher basis weight FH alternate with areas of lower basis weight FG. The number of baffles used for a higher and / or lower basis weight FG can also be more than one, in particular the FIGS. 7 and 8 represent. At the longitudinal edges is the desired for compression surface weight increase of the surface weight SFG.
FIG. 6 shows the grit mat in the original width B2 after and during the scattering with the longitudinal edges 17th
Corresponding to this shows FIG. 7 the necessary adjustment of the guide device 5 for influencing the Dosierflächengewichts DFG across the width B1 for producing a scattering surface weight SFG across the width B2. For this purpose, the baffles 10 are at an angle to the direction of movement 12 of the material flow 24 from grit. 9
FIG. 8 Finally, it shows that the baffles 10 only partially protrude into the material flow 24 of a depth or the length L and provide for a partial displacement of the material to be spread 9 of the material flow 24 across the width B1.
FIG. 9 shows for a more complex process application respectively for fine adjustment a multiple arrangement of the guide device, consisting of a guide device 5 and downstream in the direction of movement 12 of the material flow guide 5 '. The first Guide device 5 serves to displace the scattering material 9 over the width B1, wherein the second guide device 5 'is arranged for stabilization and for the subsequent homogenization of the moving in the direction of movement 12 material flow 24. The guide 5 'thus leads to a fine adjustment of the displacement of the material to be spread 9 by the guide 5' to a "wide" emigration / displacement of the material to be 9 prevented.
In FIG. 10 There is a representation of a part of a guide device 5 with a possible arrangement of a guide plate 10 with associated adjusting device 19 for setting different angles of the guide plate 10 in two corresponding schematic views. The baffle 10 can be changed by means of the adjusting devices 19 at a distance from the guide flap 18 and moved through the opening 27 and changed accordingly the penetration depth into the material flow 24. To adjust angular settings of the guide plate 10 to the material flow 24, the baffles 10 grooves 26th into which the guide flap 18 passes when the baffle 10 is rotated about the axis of rotation 28 by means of the adjusting device 19.
FIG. 11 shows a possible adjustment 19 for each other by means of push rods 29 connected baffles 10. The baffles 10 are alternately connected to different push rod 29, so that upon movement of a push rod 29 every second baffle 10 is moved in the direction of the push rod 29.

Diese sind natürlich nur beispielhafte Anordnungen für eine Vielzahl an möglichen Verstellvorrichtungen für die Leitbleche 10. Im Rahmen der Erfindung sind weitere Möglichkeiten denkbar. Insbesondere ist es denkbar, dass die Leitbleche 10 nicht nur einen senkrechten Winkel zu einer Wand respektive zur Leitklappe 18 ausbilden, sondern auch hierzu einen, vorzugsweise getrennt einstellbaren Winkel, aufweisen. Es ist weiter bevorzugt, dass die Durchbrüche 27 Mittel zur Abdichtung aufweisen, damit nicht unnötig Staub oder Streugut aus dem Fallbereich austreten kann.
In Bezug auf die Streugutmatte 7 wäre zusammenfassend zu bemerken, dass vorzugsweise an beiden Längsrändern 17 der Streugutmatte 7 ein im Wesentlichen geringeres Flächengewicht FG als das Dosierflächengewicht DFG angeordnet sein sollte. Vorzugsweise wird an der Streugutmatte 7 mit Längsrändern 17 mittels einer Besäumvorrichtung 23 Längsränder 20 angeordnet sind, wobei die Längsränder 20 ein höheres Flächengewicht FH als das Dosierflächengewicht DFG und/oder das Streuflächengewicht SFG und/oder als das durchschnittliche Flächengewicht der Streugutmatte 7 aufweisen. Bevorzugt wird die Erstellung der Streugutmatte 7 in einer beanspruchten Anlage und/oder durch die Erstellung der Streugutmatte nach dem Verfahren durchgeführt. Bezugszeichenliste 1. Streukopf 20. Längsränder an B3 2. Bunker 21. Fallbreite 3. Gehäuse von 1 22. Presse 4. Auflösevorrichtung 23. Besäumvorrichtung 5. Leitvorrichtung 1 (Abwurfbereich) 24. Materialstrom 25. Rückstreifvorrichtung 6. Leitvorrichtung 2 (Streubereich) 26. Nuten in 10 7. Streugutmatte 27. Durchbruch in 18 8. Formband 28. Drehachse 9. Streugut 29. Schubstange 10. Leitblech 11. Produktionsrichtung DFG Dosierflächengewicht 12. Bewegungsrichtung SFG Streuflächengewicht 13. B Breite Formband 8 14, Streuvorrichtung B1 Breite Streugut nach 15 B2 Breite Streugutmatte 15. Dosiervorrichtung B3 Breite Streugutmatte nach 23 16. Bunkerbodenband L Länge Streugut in 11 17. Längsränder an B2 FH Flächengewicht hoch 18. Leitklappe FG Flächengewicht gering 19. Stellvorrichtung
These are of course only exemplary arrangements for a variety of possible adjusting devices for the baffles 10. Within the scope of the invention, further possibilities are conceivable. In particular, it is conceivable that the baffles 10 not only form a vertical angle to a wall or to the guide flap 18, but also for this purpose, preferably have separately adjustable angle. It is further preferred that the openings 27 have means for sealing, so that unnecessary dust or grit can escape from the fall area.
With regard to the spreading material mat 7, it should be noted in summary that preferably at both longitudinal edges 17 of the spreading material mat 7, a substantially lower basis weight FG should be arranged than the metering surface weight DFG. Preferably longitudinal edges 20 are arranged on the spreading material mat 7 with longitudinal edges 17 by means of a trimming device 23, wherein the longitudinal edges 20 have a higher basis weight FH than the dosing surface weight DFG and / or the scattering surface weight SFG and / or than the average basis weight of the spreading material mat 7. Preferably, the preparation of the grit mat 7 is carried out in a claimed system and / or by the preparation of the grit mat according to the method. LIST OF REFERENCE NUMBERS 1. spreading head 20th Long edges at B3 Second bunker 21st case width Third Housing of 1 22nd Press 4th dissolver 23rd trimming device 5th Guide device 1 (discharge area) 24th material flow 25th Back stripping device 6th Guide device 2 (scattering area) 26th Grooves in 10 7th grit mat 27th Breakthrough in 18 8th. forming belt 28th axis of rotation 9th grit 29th pushrod 10th baffle 11th production direction DFG Dosierflächengewicht 12th movement direction SFG Diffusing surface weight 13th B Wide Formband 8 14 spreader B1 Wide spreading material after 15 B2 Wide spreading material mat 15th metering B3 Wide spreading material mat after 23 16th Bunker floor belt L Length of spreading material in 11 17th Long edges at B2 FH Grammage high 18th deflector FG Basis weight low 19th locking device

Claims (22)

  1. Method for producing a scattered material mat (7) from at least one layer of scattered material (9) on an endlessly circulating forming belt (8) by means of at least one scattering head (1) in the course of pressing the scattered material mat (7) in a press (22) to form a material board, wherein the scattered material (9) is stored in a bunker (2) and metered by a metering device (15) and discharged with a substantially uniform metering weight per unit area (DFG) transversally across a width (B1) and with a length (L) in the production direction (11) of the forming belt (8) as a material flow (24), and then introduced substantially in the direction of movement (12) into the scattering head (1) and scattered on the forming belt (8) with at least one scattering device (14) in an oriented and/or unoriented manner over a width (B2), characterized in that by means of at least one mechanical guide device (5) between the metering device (15) and the scattering device (14) the scattered material (9) is partially displaced in the material flow (24) substantially transversely to the production direction (11) of the forming belt (8) and/or that the scattered material (9) is partially stabilized in the material flow (24) in its movement in the direction of movement (12), wherein the mechanical guide device (5) only partially influences the material flow (24) by means of guide plates (18) distributed over the width, in that the guide plates (18) protrude only partially in the length (L) into the material flow (24) for partial displacement of the scattered material (9) across the width (B1) and are at an angle to the direction of movement of the material flow (24).
  2. Method according to claim 1, characterized in that as a result of the guide device (5), the substantially uniform metering weight per unit area (DFG) of the material flow (24) is changed to a differentiated scattering weight per unit area (SFG).
  3. Method according to claim 1 or 2, characterized in that the stabilization and/or the displacement of the scattered material (9) in the material flow (24) is carried out in several stages with guide devices (5, 5') disposed successively in the direction of movement (11) of the scattered material (9).
  4. Method according to one or more of the preceding claims, characterized in that the stabilization and/or the displacement is carried out before entry of the material flow (24) into the scattering head (1) and/or before the first contact of the material flow (24) with a moving machine element of the scattering head (1).
  5. Method according to one or more of the preceding claims, characterized in that the scattered material (9) is scattered in a width (B2) onto the forming belt (8) to form a scattered material mat which essentially follows the width (B1) of the material flow (24) after the metering device (15).
  6. Method according to one or more of the preceding claims, characterized in that by means of the guide device (5) in the scattering weight per unit area (SFG) over the width (B2) at least a first region is set with a higher weight per unit area (FH) than the metering weight per unit area (DFG) and adjacent at least one further area with a lower weight per unit area (FG), in particular lower than the metering weight per unit area (DFG).
  7. Method according to one or more of the preceding claims, characterized in that as a mechanical guide device (5) at least one guide plate (10) is held at least partly into the scattered material (9) falling in the direction of movement, said guide plate being arranged between the metering device (15) and the scattering device (14) and preferably being movable and/or pivotable by means of at least one adjusting device (19).
  8. Method according to one or more of the preceding claims, characterized in that in particular to avoid incalculable transverse flows, the scattered material (9) is guided at least partially between bunker (2) and scattering head (1) substantially in the direction of fall (12) along a guide flap (18).
  9. Method according to one or more of the preceding claims, characterized in that in the scattering weight per unit area (SFG) across the width (B2) a plurality of areas with a higher weight per unit area (FH) and areas of lower weight per unit area (FG) lying therebetween are arranged such that the areas with higher weight per unit area (FH) can be used in the further course after the press (22) as parting plane for splitting the pressed material board and/or as areas for attachment of fastening means or fittings in furniture construction.
  10. Method according to one or more of the preceding claims, characterized in that at the longitudinal edges (17) of the scattered scattered material mat (7) a substantially lower weight per unit area (FG) is set than the metering weight per unit area (DFG).
  11. Method according to one or more of the preceding claims, characterized in that the scattered material mat (7) between the spreading head (1) and the press (22) is cut by means of an edging device (23) at the longitudinal edges (17) to a width (B3) with longitudinal edges (20), wherein the new longitudinal edges (20) are arranged in regions of higher weight per unit area (FH) than the metering weight per unit area (DFG) and/or than the scattering weight per unit area (SFG) of the longitudinal edges (17) and/or than the average weight per unit area of the scattered material mat (7).
  12. Method according to one or more of the preceding claims, characterized in that an illustrative curve of the scattering weight per unit area (SFG) over the width (B2) has a, preferably axis-related, symmetry with respect to the geometric center of the width (B2).
  13. Method according to one or more of the preceding claims, characterized in that the scattered material (9) is supplied by means of the guide flap (18) to at least one dissolving device (4) arranged between the guide flap (18) and the scattering device (14).
  14. Method according to one or more of the preceding claims, characterized in that the guide flap (18) and/or at least one guide plate (10) are arranged over the width of the forming belt (8) and are adjusted by means of adjusting devices (19) for stabilizing and/or influencing the metering weight per unit areas (DFG) in their position relative to the scattered material (9) moved in the direction of fall (12) and/or to the forming belt (8) and/or to the side walls (3) of the scattering head (1).
  15. Method according to one or more of the preceding claims, characterized in that the guide device (5) or guide plates (10) penetrate substantially 10% to 80%, preferably between 30% and 50%, into the material flow (24) in an orientation in the production direction (11) of the forming belt (8) in the direction of the length (L) of the material flow (24).
  16. Installation for producing a scattered material mat (7) from at least one layer of scattered material (9) on an endlessly circulating forming belt (8) by means of at least one scattering head (1) during the pressing of the scattered material mat (7) in a press (22) into a material board, wherein in the installation at least one bunker (2) is further arranged for storing the scattered material, wherein a metering device (15) is arranged on the output side of the bunker (2) for the discharge, for the purpose of metering a uniform metering weight per unit areas (DFG) and for the supply of the scattered material (9) as a material flow (24) transversely over a width (B1) and with a length (L) in the production direction (11) of the forming belt (8), and at least one scattering device (14) is arranged in the scattering head (1) for oriented and/or unoriented scattering of the scattered material over a width (B2) of the forming belt (8), characterized in that for the partial displacement of the scattered material (9) substantially transversely to the production direction (11) of the forming belt (8) in the material flow (24) and/or for partial stabilization of the scattered material (9) in the material flow (24) at least one mechanical guide device (5) is arranged in the direction of movement (12) between the metering device (15) of the bunker (2) and the scattering device (14) of the scattering head (1), wherein in the mechanical guide device (5) guide plates (18) which are distributed over the width are arranged for partially influencing the material flow (24), wherein the guide plates (18) protrude for the partial displacement of the scattered material (9) over the width (B1) only partially in the length (L) into the material flow (24) and can be set at an angle to the direction of movement of the material flow (24).
  17. Installation according to claim 16, characterized in that the guide device (5) is arranged for stabilizing and/or displacing the scattered material (9) in the material flow (24) substantially after the metering device (15) and before entry of the material flow (24) into the scattering head (1) and/or before the first contact of the material flow (24) with a moving machine element of the scattering head (1).
  18. Installation according to one or more of the preceding claims 16 to 18, characterized in that as a mechanical guide device (5) a guide plate (10) is at least partly arranged in the scattered material (9) moved in the direction of movement (12) or in the material flow (24), said guide plate being arranged between the metering device (15) and the scattering device (14) and being movable and/or pivotable by means of at least one adjusting device (19).
  19. Installation according to one or more of the preceding claims 16 to 18, characterized in that for guiding the scattered material (9) between the bunker (2) and scattering head (1) substantially in the direction of fall (12) at least partially a guide flap (18) is arranged at least over the width (B1).
  20. Installation according to one or more of the preceding claims 16 to 19, characterized in that at least one dissolving device (4) for the scattering material (9) is arranged between the guide flap (18) and the scattering device (14).
  21. Installation according to one or more of the preceding claims 16 to 20, characterized in that the guide flap (18) and/or at least one guide plate (10) are arranged over the width of the forming belt (8) and are adjustably arranged by means of adjusting devices (19) in their position relative to the scattered material (9) moved in the direction of fall (12) and/or to the forming belt (8) and/or to the side walls (3) of the scattering head (1).
  22. Installation according to one or more of the preceding claims 16 to 21, characterized by the use of the system for carrying out the method.
EP11710668.2A 2010-02-05 2011-02-05 Methods and installation for producing a particle mat from at least one spread layer Active EP2531331B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010001649A DE102010001649A1 (en) 2010-02-05 2010-02-05 Process and installation for producing a spreading material mat of at least one scattered layer and a spreading material mat for pressing in a press in the course of the production of wood-based panels (L)
PCT/EP2011/000540 WO2011095356A1 (en) 2010-02-05 2011-02-05 Methods and installation for producing a particle mat from at least one spread layer and a particle mat to be pressed in a press during the production of wood particle boards

Publications (2)

Publication Number Publication Date
EP2531331A1 EP2531331A1 (en) 2012-12-12
EP2531331B1 true EP2531331B1 (en) 2018-07-11

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EP11710668.2A Active EP2531331B1 (en) 2010-02-05 2011-02-05 Methods and installation for producing a particle mat from at least one spread layer

Country Status (4)

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EP (1) EP2531331B1 (en)
CN (1) CN102802895B (en)
DE (1) DE102010001649A1 (en)
WO (1) WO2011095356A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102015107372A1 (en) * 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and device for spreading a fleece in the course of the production of material plates and a material plate
DE102015107373A1 (en) * 2015-05-11 2016-11-17 Dieffenbacher GmbH Maschinen- und Anlagenbau Method and device for spreading a fleece in the course of the production of material plates and a material plate
DE102016110073A1 (en) * 2016-05-31 2017-11-30 Dieffenbacher GmbH Maschinen- und Anlagenbau Spreader and method for the continuous application of grit on a forming belt
DE102016113014B4 (en) * 2016-07-14 2020-03-05 Dieffenbacher GmbH Maschinen- und Anlagenbau Spreading system and method for producing a spreading material mat in the course of the production of material plates
DE102017111093B4 (en) * 2017-05-22 2020-01-30 Dieffenbacher GmbH Maschinen- und Anlagenbau Spreading system for producing a spreading material mat and method for operating such a spreading system
DE102018107354A1 (en) * 2018-03-28 2019-10-02 Siempelkamp Maschinen- Und Anlagenbau Gmbh spreader
US20210170627A1 (en) * 2018-05-02 2021-06-10 Xylo Technologies Ag Method and apparatus for producing a board for production of panels, board for production of panels, method and apparatus for producing panels, and panel producible by the method
US11518061B2 (en) 2018-05-02 2022-12-06 Xylo Technologies Ag Method and apparatus for producing a board

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Also Published As

Publication number Publication date
WO2011095356A1 (en) 2011-08-11
CN102802895A (en) 2012-11-28
EP2531331A1 (en) 2012-12-12
DE102010001649A1 (en) 2011-08-11
CN102802895B (en) 2016-08-03

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