EP0800902B1 - Method for continuous manufacturing of a mat for boards of wooden or like material - Google Patents

Method for continuous manufacturing of a mat for boards of wooden or like material Download PDF

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Publication number
EP0800902B1
EP0800902B1 EP96105712A EP96105712A EP0800902B1 EP 0800902 B1 EP0800902 B1 EP 0800902B1 EP 96105712 A EP96105712 A EP 96105712A EP 96105712 A EP96105712 A EP 96105712A EP 0800902 B1 EP0800902 B1 EP 0800902B1
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EP
European Patent Office
Prior art keywords
spreading
channel
accordance
rollers
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96105712A
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German (de)
French (fr)
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EP0800902A1 (en
Inventor
Uwe Dr. Kunstmann
Michael Diefenbach
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Dieffenbacher Schenck Panel GmbH
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Dieffenbacher Schenck Panel GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Dieffenbacher Schenck Panel GmbH filed Critical Dieffenbacher Schenck Panel GmbH
Priority to EP96105712A priority Critical patent/EP0800902B1/en
Priority to DE59608838T priority patent/DE59608838D1/en
Priority to US08/833,464 priority patent/US5887515A/en
Priority to CA002202343A priority patent/CA2202343A1/en
Publication of EP0800902A1 publication Critical patent/EP0800902A1/en
Application granted granted Critical
Publication of EP0800902B1 publication Critical patent/EP0800902B1/en
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Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a process for continuous production a continuous fleece made of stored particles different dimensions by means of conveyor spreading process for a production of wood-based panels or similar panels by subsequently pressing the fleece.
  • EP 0 626 241 A1 describes a method and a device for evenly distributing pourable material on one known moving in a conveying direction.
  • the equalization facility consists of several transport elements arranged one behind the other in the transport direction, between which partial flows of the material the entire spread is dissipated to the base.
  • a device has become known from German Auslegeschrift 1205274 in the by means of wood chips or similar sprinkled Paricle is formed on a strand carrier (forming tape), that gets into a press continuously or in sections produces solid moldings, in particular chipboard, in which the Scatter particles are oriented in different directions, whereby then either by way of the scattering particles from the litter to the strand carrier one or more swing frames or one or more special throwing rollers, or one or more whirlwind nozzles, or a combination of these or equivalent devices are provided, via or on which past the scattering particles coming from the litter for orientation in have to go in substantially different directions.
  • the present invention is based on the object regardless of the speed of the spreading rollers for the conveyor spreading process to have a well-defined discharge level for the litter, so not only no missing particles get into the scatter, but also one over the total scatter uniform build-up of those passing through the rollers Particle is reached. By defining a distance between the scattering level and the fleece level there will still be incorrect scattering counteracted.
  • This object is achieved according to claim 1 in that during the conveyor spreading process initially intentionally continuously over the entire spread and the spreading length of the conveyor spreading process formed intermediate stocks from which individual scattering processes for continuous formation of the continuous fleece. This ensures that both the distance between the start of spreading and the spreading of the spreading material is very well defined in the fleece, and that on the other hand depending on the Intermediate stocks practically the same amount of particle stream to be scattered is spread over the entire conveyor spreading process.
  • An embodiment according to claim 3 of the inventive method exists in the fact that the deliberate formation of the intermediate stocks over the spread the conveyor spreading process is controllable. By this control lets the density and thus the strength also in the transverse direction of the finished Affect wood-based panel, so that in the end a wood-based panel can be generated in both the longitudinal and transverse directions predetermined strength properties can be generated.
  • An embodiment of the method according to claim 4 is according to claim 5 according to the invention protected in such a way that the discharged particles be re-shredded, at the end of which can be used Particles are recycled, and unusable particles are excreted become. On the one hand, this results in a reduction in the amount to be eliminated Materials achieved and beyond a recycling of such Material allows, for example when using wood, which a very small thickness, but a considerable one in the other dimensions Has area extension.
  • Protection is provided that depending on the scattering of the intended particles and depending on the formation of the continuous fleece by means of a conveyor spreading process, a preselectable separation of the particles takes place. Alone through the pre-selectable separation of the particles depending on the connection of the particle flow and the throughput through the conveying process predeterminable cross-sectional profiles through the thickness of the fleece.
  • each spreader roller alternate in the circumferential direction several floors, first equally long, channel-shaped depressions and offset several floors with second, equally long, channel-shaped depressions that each floor of the respective channel-shaped depressions by webs is separated from the next floor on the surface of the jacket, and that the respective first and second equally long, channel-shaped depressions in Axial direction of each spreader roller through webs over the entire length of the Shell surface of the spreader roller are separated so that each channel-shaped Depression represents a separate depression in the surface of
  • This device allows preselectable subsets from the litter particles emerging from the bunkers, and at the same time by the rotation of the row of spreader rollers a conveying process effect, with which the other, separate depressions of the spreader rollers be filled at the same time, so that with further rotation of the Spreading rollers a conveyor spreading process arises, in which essentially equal amounts of spreading material at the same time from the rotating Spreading rollers are released and put down on the continuously moving document are stored.
  • each spreader roller obliquely to their Axial arranged first, equally long channel-shaped depressions carries that offset several floors with second, channel-shaped channels of equal length Wells are provided, the channel axes of which are at an angle to the oblique Channel axes of the first, equally long channel-shaped depressions take in. Due to the arrangement of oblique to each other equally long, channel-shaped depressions, which do not, however, mutually rotate, is achieved according to the invention that in particular with directly with her Rotating spreader rollers in contact with one another crush or wedge litter before reaching channel-shaped Wells are avoided, and that the transport process over the entire arrangement of rotating rotating Spreading rollers run flawlessly. This will further improve it Intermediate storage in the channel-shaped depressions achieved, which then by turning the spreading rollers further, an exact spreading from these Permits intermediate bunkers on the underlying surface.
  • the angle between the first and second be of equal length is channel-shaped depressions greater than 0 degrees and less than 180 degrees.
  • Claim 10 proposed that the respective channel-shaped sections wear semicircular arches at the ends of the roller shell. Through the Arrangement of semicircular arches will get the scattering particles caught Filling and emptying the channel-shaped sections easier.
  • the channel-shaped sections starting from the roll jacket to the channel base perpendicular to the direction of the Channel axis are rounded.
  • This design of the channel also promotes both filling and emptying the channel-shaped sections; it also serves to squeeze conveyed on the spreading rollers Spreading particles to the next spreading rollers of the conveyor spreading device, which facilitates the spreading process.
  • channel-shaped sections according to the invention are rounded Wear cross sections. This configuration according to the invention helps to keep it clean of the channel-shaped sections.
  • each spreader roller from at least two in the axial direction roller sleeves arranged one behind the other with channel lengths of equal length There are depressions and that the webs over the entire length of the jacket Spreading roller have an uninterrupted course.
  • claim 14 Protection is sought for that visible between the spreader roller sleeves circumferential butt edge with at least two consecutively arranged Spreading rollers are not aligned with each other. This is achieved that there are no harmful influences from the abutting edges over the entire Run out row of rotating spreader rollers.
  • the measure to be protected according to claim 16 is that two sleeves an abutting edge between the sleeves, outside the Middle between the two roller surfaces, is arranged. This represents one represents particularly preferred embodiment of the subject of the invention, with regard to avoid the deflection of sleeve-shaped spreader rollers.
  • the distance (depth) between the surface of the spreader roll and channel bottom of the channel-shaped sections of Spreading roller to spreading roller have a different dimension. This enables that over the transport route, i.e. in the area of the conveyor spreading process, additional material in the channel-shaped sections of the downstream or upstream pairs of spreading rollers are temporarily stored can. On the one hand, this increases the throughput with the same spread quality such conveyor spreading increases, and on the other hand is an interference the spreading quality avoided.
  • the device protected in claim 18, which is also a Design of the device according to the invention also serves for Carrying out the method according to claims 1-6, if in claim 18 under Protection is provided that the distance (depth) between the surface of the spreader roller and channel bottom of the channel-shaped sections over the length of the individual spreader roller have different dimensions.
  • claim 20 a use of the hobbing process or the pressure or the injection molding process in the manufacture of the surfaces of the spreader rollers according to the claims 7-19 for performing the method according to one or more of the Claims 1-6 of the present invention are protected.
  • spreading rollers produced after use are distinguished characterized in that the surface of its shell is subsequently machined Processing process are subjected.
  • mechanical processing the surface of the jacket is achieved for the first time for a conveyor spreading process provided spreader rollers even when their roller jackets are in direct contact for the first time an unambiguous intermediate storage of what is required for scattering Enable particle flow.
  • this is for the first time thanks to the inventive rows of spreading rollers achieved with a smooth, breakthrough surface that well defined a stream consisting of particles of different dimensions, continuously a fleece is formed in which, depending on the direction of movement Document for the reception and / or the arrangement of the conveyor spreading process performing inventive arranged one behind the other Spreading rollers create a fleece over the base, the cross-section of the outer layer starting with fine particles up to a layer with coarser or coarse particles are continuously formed, and from here from in continuous training to the other outer layer of the Fleece runs with fine particles again.
  • litter particles 2 are stored in a bunker 1 a discharge 3 fed to a scattering station 4, the width of which is the width corresponds to a base 5 on which a chip fleece 6 is produced, which then continuously in a press station, not shown or is pressed discontinuously into wood-based panels.
  • the pre-dissolving rollers are already in the spreading station and distribute the scattering particles according to their rotation in the direction of the arrow, in Longitudinal direction of the spreading station 4.
  • a number of spreading rollers 11 is shown below the pre-dissolving rollers 10, of which only the first and last of the spreading rollers with the Reference number 11 was designated.
  • the rest are in the exemplary embodiment 10 spreader rollers 11 which are like the first and last spreader rollers 11 in Turn clockwise, not for the sake of clarity with the reference symbols 11, at the end of this row of spreader rollers 11, which also To extend over the entire width of the base 5 is one Return screw 12 arranged, which serves to scatter particles, which due to their size, not through the spreading rollers during the conveyor spreading process 11 could be led through, to catch and over suitable Return lines to bunker 1 or faulty material, for example lumps of glue to convey out of the conveyor spreading process in order to to be excreted via the return screw 12.
  • all 12 spreader rollers 11 rotate in the same Direction, i.e. in a clockwise direction. However, it is also possible that the spreader rollers 11 rotate in total in the opposite direction. This then requires that the return screw 12 on the other End of the spreader rollers 11 is arranged in order to avoid that defective goods on the pad 5 is applied to form the fleece 6, and thus the outermost layer of the fleece to be pressed is adversely affected.
  • rollers 11 each have different speeds have to either the promotion of the accelerating particle flow to a fleece to a to achieve higher throughput by the spreader rollers 11, or at one Reduction of the speed of the individual spreading rollers at one smaller amount of scattering particles 2 also a smooth passage of to be scattered particles 2 by the spreading rollers 11 for to produce a uniform chip fleece.
  • FIG 2 is a development 13 of the jacket of spreader roller sleeves 14, 15, as can be seen on the developments 13, are about the scope the spreader roller sleeves 14, 15 have channel-shaped depressions 16 of equal length or 17 is provided, each for the length of the spreader roller sleeve Levels 18 form and each channel-shaped recess 16 of one level 18 with each channel-shaped recess 17 of the other tier 18 with their channel axes 19 and 20 enclose an angle, which in the exemplary embodiment greater than 90 degrees with respect to a spreader roller axis 21 (compare, for example Figure 4).
  • the control roller sleeves 14, 15 have a certain length and thus it can by lining up several such spreader roller sleeves 14, 15 one Spreading roller can be obtained in which the connection between the individual Sleeves 14, 15 via positioning and locking pins 22 (see also for example Figure 4), so that only the two outermost Spreading roller sleeves 14, 15 (see FIG. 4) bearing axles 23, 24 are arranged need to be the individual from spreader roller sleeves 14, 15 for example consisting of spreader roller 11 in a storage, not shown to be stored within the spreading station 4.
  • Figure 1 displayed here can all spreader rollers 11 in one; Roller mill 25 shown here be arranged.
  • the roller mill 25 itself can be raised and lowered (not shown) or tiltable to the base 5 (also not shown) be arranged.
  • roller mill 25 By lifting or lowering and / or tilting the Roller mill 25 to the base 5 can be the scattering path between the exit plane from the channel-shaped recesses 16 and 17 from all floors at the specified amount and also depending on the increase in the amount to be pressed Fleece arranged above the fleece under construction become. This ensures that no change in the spread of the serving as a buffer channel-shaped depressions up to Hitting on the pad 5 or hitting the already in Realized nonwoven layer takes place.
  • FIG. 3a shows an enlarged section from the development 13 according to FIG 2 was chosen to clarify that between the channel-shaped Wells 16 and 17 floor webs 27 and 28 are provided, and also webs 29 are provided between the channel-shaped depressions 16 and 17, which extend over the entire length of the spreader roller sleeves 14, 15.
  • 3b shows a section along a channel-shaped depression 16, as can be seen from this, the ends of the channel base 30 are semicircular 31 led to the jacket 32 of the spreader roller 11.
  • 3c which shows a section according to B-B according to FIG. 3a, it can be seen that the channel-shaped depressions 16 and 17 are semicircular are formed, and that the respective channel base 30 a distance 33 to the surface of the surface of the spreader roller 11. The same distance 33 also has the channel base 30 from the jacket surface 32 of the spreader roller 11th
  • the spreader rollers 11 are downstream with each increasing channel-shaped Wells equipped, so it can be easily seen that thereby a significantly higher throughput of scattering particles through the adjoining spreading rollers can be enforced without a Clogging or jamming when the scattering particles pass through the Spreading rollers 11 can occur.
  • the largest channel-shaped depression is here always chosen smaller than the parts that are not stored, the are discharged via the return screw 12. Such a size determination can be realized in that, according to the smooth surface of all spreading rollers 11 a determination of the largest still to be let through Particle can be determined.
  • the spreader rollers close 11 are close to each other and occurring abutting edges 35 and 36, respectively staggered over the length of the spreader rollers 11 to each other. So that is excluded that scattering errors can occur due to these abutting edges.
  • the abutting edges 35 and 36 in one plane can also spiral abutting edges between the individual spreader roller sleeves 14, 15, 35 can be used.
  • FIG. 4 also shows, when using two spreader roller sleeves 14 and 15 the abutting edge of these two spreader roller sleeves arranged outside the center.
  • Such a combination is different long spreader roller sleeves 14, 15 for producing a spreader roller 11 suitable the deflection of a non-spreader roller sleeves Reduce spreading roller.

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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)

Description

Die Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung eines fortlaufenden Vlieses aus bevorrateten Partikeln verschiedener Abmessungen mittels Förderstreuvorgang für eine Herstellung von Holzwerkstoff- oder ähnlichen Platten mittels anschließender Verpressung des Vlieses.The invention relates to a process for continuous production a continuous fleece made of stored particles different dimensions by means of conveyor spreading process for a production of wood-based panels or similar panels by subsequently pressing the fleece.

Aus der EP 0 626 241 A1 ist ein Verfahren und eine Vorrichtung zum gleichmäßigen Verteilen schüttfähigen Materials auf eine in eine Förderrichtung bewegte Unterlage bekannt. Hierbei wird aus einer oberhalb der Unterlage angeordneten Aufgabestelle Material zugeführt, wobei zunächst ein dosiertes Aufgeben eines Materialstroms über die gesamte quer zur Förderrichtung verlaufende Streubreite auf eine zwischen der Unterlage und der Aufgabestelle angeordnete Vergleichmäßigungseinrichtung erfolgt. Die Vergleichmäßigungseinrichtung besteht aus mehreren in Transportrichtung hintereinander angeordneten Transportelementen, zwischen welchen Teilströme des Materials über die gesamte Streubreite zur Unterlage abgeführt werden.EP 0 626 241 A1 describes a method and a device for evenly distributing pourable material on one known moving in a conveying direction. Here will from a drop point located above the document Material supplied, first of all a metered application of a Material flow across the entire cross to the conveying direction spreading spread on a between the base and equalization device arranged at the point of delivery he follows. The equalization facility consists of several transport elements arranged one behind the other in the transport direction, between which partial flows of the material the entire spread is dissipated to the base.

Durch die Offenbarung in der US Patentschrift 5012933 ist ein Verfahren und eine Vorrichtung zum Ausscheiden von überdickem Holzmaterial bekannt geworden, bei welcher mittels einer Walzensiebeinrichtung nicht für den Siebvorgang passendes Material ausgeschieden wurde, um anschließend durch eine Nachzerkleinerung erneut dem Siebvorgang zugeführt zu werden. Gleichzeitig wurde hierbei eine Aufteilung des auszusiebenden Materials dadurch erreicht, daß über ein derartiges Walzensieb, bei welchem die Walzen in Förderrichtung zunehtend einen größeren Abstand gegenseitig aufwiesen, zunächst im ersten Schritt über einen bestimmten Bereich Holzmaterial abgesiebt wurde, welches sowohl Holzteilen enthielt, die die richtige Größe besaßen, als auch Holzteile, die noch Holzmaterial enthielten, welches aus etwas größeren Holzteilchen bestand, während noch größeres Holzmaterial am Ende des ersten Walzenganges ausgetragen wurde. Am Ende des Walzengang wurden dann übergroße Holzstücke, ohne dem Absieben zugeführt zu werden, direkt einer weiteren Zerkleinerung zugeführt.By the disclosure in US Patent 5012933 is a Method and device for eliminating oversized Wood material has become known, in which by means of a roller screen material not suitable for the sieving process was excreted in order to be subsequently shredded to be returned to the screening process. simultaneously was a division of the material to be screened achieved in that over such a roller screen, in which the rollers are increasingly larger in the conveying direction Distance from each other, initially in the first Sieved step over a certain area of wood material which contained both wooden parts that were the right ones Had size, as well as wooden parts that still contained wood material, which consisted of slightly larger pieces of wood, while even larger wood material on Was carried out at the end of the first roller pass. At the end of the roller train then oversized pieces of wood were removed without being screened, fed directly to another shredding.

In einem zweiten Siebvorgang, welcher unterhalb des ersten Siebvorganges stattfand, wurde dann nocheinmal zwischen feinem Material und verwendbarem Material aufgeteilt, wobei in dieser Etage Feingut durch das Rollensieb in einem Bunker abgeschieden wurde, während das für die Herstellung von Papier erforderliche Holzmaterial in einem anderen Bunker der Weiterverarbeitung zugeführt wurde. Mit einem derartigen Siebverfahren läßt sich mittels des dort offenbarten Förderstreuvorganges kein Vlies aufbauen, welches zur Herstellung von Holzwerkstoff- oder ähnlichen Platten verwendet werden kann.In a second sieving process, which is below the first sieving process took place, was then again between fine material and usable Material divided, fine material through the roller screen in a bunker was deposited while making paper required wood material in another bunker for further processing was fed. With such a screening process, the disclosed conveyor spreading process do not build a fleece, which for Manufacture of wood-based panels or similar boards can be used can.

Durch die Deutsche Auslegeschrift 1205274 ist eine Vorrichtung bekannt geworden, in der mittels wurfgestreuter Holzspäne oder ähnlicher streufähiger Parikel auf einen Strangträger (Formband) ein Strang gebildet wird, der kontinuierlich oder abschnittsweise in eine Presse gelangt, die daraus feste Formkörper, insbesondere Holzspanplatten, herstellt, in denen die Streupartikel in unterschiedlichen Richtungen orientiert liegen, wobei dann im Wege der Streupartikel von der Wurfstelle zum Strangträger entweder ein oder mehrere Schwingrahmen oder ein oder mehrere Spezialwurfwalzen, oder ein oder mehrere Wirbelwinddüsen, oder eine Kombination dieser bzw. gleichwirkender Vorrichtungen vorgesehen sind, über die bzw. an denen vorbei die von der Wurfstelle kommenden Streupartikel zur Orientierung in wesentlich verschiedenen Richtungen passieren müssen. Mit einer derartigen Vorrichtung ist es schwierig, ein Vlies zur Herstellung von Holzwerkstoffoder ähnlichen Platten zu erzeugen, bei welchen ausgeschlossen ist, daß nicht doch Partikel falscher Größe in das zu verpressende Vlies hineintransportiert werden. Es hat auch nicht an Versuchen gefehlt, durch Drehzahlvariationen eine entsprechende Verbesserung zu erreichen, um derartige Mängel zu beseitigen. Diese Versuche schlugen jedoch fehl.A device has become known from German Auslegeschrift 1205274 in the by means of wood chips or similar sprinkled Paricle is formed on a strand carrier (forming tape), that gets into a press continuously or in sections produces solid moldings, in particular chipboard, in which the Scatter particles are oriented in different directions, whereby then either by way of the scattering particles from the litter to the strand carrier one or more swing frames or one or more special throwing rollers, or one or more whirlwind nozzles, or a combination of these or equivalent devices are provided, via or on which past the scattering particles coming from the litter for orientation in have to go in substantially different directions. With such a It is difficult to use a fleece for the production of wood-based materials or device to produce similar plates, in which it is excluded that particles of the wrong size are not transported into the fleece to be pressed become. There has been no shortage of attempts by Speed variations to achieve a corresponding improvement to eliminate such defects. However, these attempts failed.

Ausgehend hiervon liegt der vorliegenden Erfindung die Aufgabe zugrunde, unabhängig von der Drehzahl der Streuwalzen für den Förderstreuvorgang eine wohldefinierte Abwurfebene für das Streumaterial zu besitzen, damit nicht nur keine Fehlpartikel in die Streuung geraten, sondern auch eine über die gesamte Streuung gleichmäßiger Aufbau der durch die Walzen hindurchtretenden Partikel erreicht wird. Durch die Definition eines Abstandes zwischen Streuebene und Vliesebene wird weiterhin einer Fehlstreuung entgegengewirkt.Proceeding from this, the present invention is based on the object regardless of the speed of the spreading rollers for the conveyor spreading process to have a well-defined discharge level for the litter, so not only no missing particles get into the scatter, but also one over the total scatter uniform build-up of those passing through the rollers Particle is reached. By defining a distance between the scattering level and the fleece level there will still be incorrect scattering counteracted.

Diese Aufgabe wird gemäß Anspruch 1 dadurch gelöst, daß während des Förderstreuvorganges zunächst vorsätzlich kontinuierlich über die gesamte Streubreite und die Streulänge des Förderstreuvorganges Zwischenvorräte gebildet werden, aus denen heraus Einzelstreuvorgänge zur kontinuierlichen Bildung des fortlaufenden Vlieses erfolgen. Damit wird erreicht, daß zum einen sowohl der Abstand zwischen dem Streubeginn und dem Ablagern des Streugutes im Vlies sehr wohl definiert ist, und daß zum anderen in Abhängigkeit des Zwischenvorrates praktisch die gleiche Menge an zu streuendem Partikelstrom über dem gesamten Förderstreuvorgang ausgebracht wird.This object is achieved according to claim 1 in that during the conveyor spreading process initially intentionally continuously over the entire spread and the spreading length of the conveyor spreading process formed intermediate stocks from which individual scattering processes for continuous formation of the continuous fleece. This ensures that both the distance between the start of spreading and the spreading of the spreading material is very well defined in the fleece, and that on the other hand depending on the Intermediate stocks practically the same amount of particle stream to be scattered is spread over the entire conveyor spreading process.

In Ausgestaltung dieses erfinderischen Verfahrens wird gemäß Anspruch 2 vorgeschlagen, daß die vorsätzliche Bildung der Zwischenvorräte über die Streulänge des Förderstreuvorganges steuerbar ist. Hierdurch läßt sich beispielsweise bei einer abschnittsweisen Verpressung eines Vlieses zu Holzwerkstoffplatten die Dichte und damit die Festigkeit der Holzwerkstoffplatte in Längsrichtung beeinflussen.In an embodiment of this inventive method, according to claim 2 proposed that the deliberate formation of the intermediate stocks over the Scattering length of the conveyor spreading process is controllable. This allows, for example in a section-wise pressing of a fleece into wood-based panels the density and thus the strength of the wood-based panel influence in the longitudinal direction.

Eine Ausgestaltung gemäß Anspruch 3 des erfinderischen Verfahrens besteht darin, daß die vorsätzliche Bildung der Zwischenvorräte über die Streubreite des Förderstreuvorganges steuerbar ist. Durch diese Steuerung läßt sich die Dichte und damit die Festigkeit auch in Querrichtung der fertigen Holzwerkstoffplatte beeinflussen, so daß im Endefekt eine Holzwerkstoffplatte erzeugbar ist, bei der sowohl in Längs- als auch in Querrichtung vorgegebene Festigkeitseigenschaften erzeugbar sind.An embodiment according to claim 3 of the inventive method exists in the fact that the deliberate formation of the intermediate stocks over the spread the conveyor spreading process is controllable. By this control lets the density and thus the strength also in the transverse direction of the finished Affect wood-based panel, so that in the end a wood-based panel can be generated in both the longitudinal and transverse directions predetermined strength properties can be generated.

In noch weiterer Ausgestaltung des erfinderischen Verfahrens gemäß Anspruch 4 wird unter Schutz gestellt, daß für den Förderstreuvorgang ungeeignete Partikel mittels Fördervorgang getrennt vom Förderstreuvorgang ausgetragen werden. Durch diesen erfindungsgemäßen Fördervorgang wird eindeutig eine Trennung zwischen dem Material erreicht, welches erforderlich ist, um Holzwerkstoffplatten vorgebene Eigenschaften zu erzeugen, und welches gleichzeitig die Möglichkeit bietet, das ausgeschiedene Material entweder durch Rückführung in den Streuvorgang wiederzuverwenden oder im Falle einer Nichtverwendbarkeit des Materials, beispielsweise bei Anfall von Leimklumpen, dieses Material noch vor dem Einlagern in die Holzwerkstoffplatte auszuscheiden, wie es im erfinderischen Kennzeichen des Anspruchs 4 unter Schutz gestellt wird. In yet another embodiment of the inventive method according to claim 4 is protected that unsuitable for the conveyor litter process Particles are discharged separately from the conveyor spreading process by means of the conveying process become. This conveying process according to the invention clearly makes one Separation is achieved between the material that is required to make wood-based panels to generate specified properties, and which at the same time offers the opportunity to either pass through the excreted material Reuse in the spreading process or in the case of a The material cannot be used, for example in the event of lumps of glue, this material before it is stored in the wood-based panel to be eliminated as in the inventive characterizing part of claim 4 Protection is provided.

Eine Ausgestaltung des Verfahrens nach Anspruch 4 wird gemäß Anspruch 5 erfindungsgemäß dergestalt unter Schutz gestellt, daß die ausgetragenen Partikel einer Nachzerkleinerung zugeführt werden, an deren Ende verwertbare Partikel im Kreislauf rückgeführt, und nicht verwertbare Partikel ausgeschieden werden. Hierdurch wird zum einen eine Verringerung des auszuscheidenen Materials erreicht und darüber hinaus eine Weiterverwertung von solchem Material ermöglicht, beispielsweise bei der Verwendung von Holz, welches eine sehr geringe Dicke, jedoch in den anderen Dimensionen eine beachtliche Flächenerstreckung aufweist.An embodiment of the method according to claim 4 is according to claim 5 according to the invention protected in such a way that the discharged particles be re-shredded, at the end of which can be used Particles are recycled, and unusable particles are excreted become. On the one hand, this results in a reduction in the amount to be eliminated Materials achieved and beyond a recycling of such Material allows, for example when using wood, which a very small thickness, but a considerable one in the other dimensions Has area extension.

In noch weiterer Ausgestaltung des Verfahrens wird nach Anspruch 6 unter Schutz gestellt, daß in Abhängigkeit zur Streuung vorgesehener Partikel und in Abhängigkeit der Bildung des fortlaufenden Vlieses mittels Förderstreuvorgang, eine vorwählbare Separierung der Partikel erfolgt. Allein durch die verbindungsgemäße vorwählbare Separierung der Partikel in Abhängigkeit des Parikelstroms und des Durchsatzes durch den Förderstreuvorgang lassen sich vorgebare Querschnittsverläufe durch die Dicke des Vlieses erzeugen.In yet another embodiment of the method according to claim 6 Protection is provided that depending on the scattering of the intended particles and depending on the formation of the continuous fleece by means of a conveyor spreading process, a preselectable separation of the particles takes place. Alone through the pre-selectable separation of the particles depending on the connection of the particle flow and the throughput through the conveying process predeterminable cross-sectional profiles through the thickness of the fleece.

Ausgehend von einer Vorrichtung mit einem Bunker für Streupartikel mit Austrag einer daran anschließenden Streustation deren Breite einer herzustellenden Vliesbreite entspricht und einer in der Streustation angeordneten Reihe rotierender Streuwalzen, deren jeweilige Mäntel eine Struktur tragen, und einer unter der Streustation kontinuierlich bewegten Unterlage zur Aufnahme eines gestreuten, anschließend zur Verpressung gelangenden Spänevlieses zur Herstellung von Holzwerkstoff- oder ähnlichen Platten, wird in Anspruch 7 zur Durchführung des erfinderischen Verfahrens nach einem oder mehreren der vorhergehenden Ansprüche 1-6 erfindungsgemäß vorgeschlagen, daß die Manteloberflächen jeder Streuwalzen in Umfangsrichtung abwechselnd mehrere Etagen, erste gleichlange, kanalförmige Vertiefungen und versetzt hierzu mehrere Etagen mit zweiten, gleichlangen, kanalförmigen Vertiefungen trägt, daß jede Etage der jeweiligen kanalförmigen Vertiefungen durch Stege an der Manteloberfläche von der nächsten Etage getrennt ist, und daß die jeweiligen ersten und zweiten gleichlangen, kanalförmigen Vertiefungen in Achsrichtung jeder Streuwalze durch Stege über die gesamte Länge der Manteloberfläche der Streuwalze getrennt sind, so daß jede kanalförmige Vertiefung eine seperate Vertiefung in der Manteloberfläche darstellt. Durch diese erfindungsgemäße Vorrichtung lassen sich vorgebbare Teilmengen aus den aus den Bunkern austretenden Streupartikeln bilden, und gleichzeitig durch die Rotation der Reihe von Streuwalzen ein Fördervorgang bewirken, mit welchem auch die anderen, seperaten Vertiefungen der Streuwalzen gleichzeitig gefüllt werden, so daß bei weiterer Rotation der Streuwalzen ein Förderstreuvorgang entsteht, bei welchem im Wesentlichen gleiche Mengen an Streumaterial zur selben Zeit aus den rotierenden Streuwalzen entlassen werden und zur Ablage auf der kontinuierlich sich weiterbewegenden Unterlage abgelegt werden.Starting from a device with a bunker for scattered particles with discharge a subsequent scattering station, the width of which is to be produced Fleece width corresponds and one arranged in the spreading station Row of rotating spreader rollers, the respective shells of which support a structure, and a support for moving under the spreading station a scattered chip fleece, which is then pressed for the production of wood-based panels or similar boards, is in Claim 7 for carrying out the inventive method according to one or proposed several of the preceding claims 1-6 according to the invention, that the outer surfaces of each spreader roller alternate in the circumferential direction several floors, first equally long, channel-shaped depressions and offset several floors with second, equally long, channel-shaped depressions that each floor of the respective channel-shaped depressions by webs is separated from the next floor on the surface of the jacket, and that the respective first and second equally long, channel-shaped depressions in Axial direction of each spreader roller through webs over the entire length of the Shell surface of the spreader roller are separated so that each channel-shaped Depression represents a separate depression in the surface of the jacket. This device according to the invention allows preselectable subsets from the litter particles emerging from the bunkers, and at the same time by the rotation of the row of spreader rollers a conveying process effect, with which the other, separate depressions of the spreader rollers be filled at the same time, so that with further rotation of the Spreading rollers a conveyor spreading process arises, in which essentially equal amounts of spreading material at the same time from the rotating Spreading rollers are released and put down on the continuously moving document are stored.

In Ausgestaltung der erfindungsgemäßen Vorrichtung nach Anspruch 7 wird gemäß Anspruch 8 unter Schutz gestellt, daß jede Streuwalze schräg zu ihrer Achse angeordnete erste, gleichlange kanalförmige Vertiefungen trägt, daß versetzt hierzu mehrere Etagen mit zweiten, gleichlangen kanalförmigen Vertiefungen vorgesehen sind, deren Kanalachsen einen Winkel zu den schrägliegenden Kanalachsen der ersten, gleichlangen kanalförmigen Vertiefungen einnehmen. Durch die Anordnung schräg zueinander verlaufender gleichlanger, kanalförmiger Vertiefungen, die sich jedoch gegenseitig nicht durchdrehen, wird gemäß der Erfindung erreicht, daß insbesondere bei direkt mit ihrer Oberfläche gegenseitig in Berührung stehender, rotierender Streuwalzen, ein zerquetschen oder verkeilen von Streumaterial vor Erreichen der kanalförmigen Vertiefungen vermieden wird, und daß auch der Transportvorgang über die gesamte Anordnung von hintereinander angeordneten rotierenden Streuwalzen fehlerlos verläuft. Damit wird eine noch weiter verbesserte Zwischenspeicherung in den kanalförmigen Vertiefungen erreicht, welche dann durch Weiterdrehen der Streuwalzen eine exakte Streuung aus diesen Zwischenbunkern auf die darunter entlanggeführte Unterlage zuläßt.In an embodiment of the device according to the invention according to claim 7 Claim 8 protected that each spreader roller obliquely to their Axial arranged first, equally long channel-shaped depressions carries that offset several floors with second, channel-shaped channels of equal length Wells are provided, the channel axes of which are at an angle to the oblique Channel axes of the first, equally long channel-shaped depressions take in. Due to the arrangement of oblique to each other equally long, channel-shaped depressions, which do not, however, mutually rotate, is achieved according to the invention that in particular with directly with her Rotating spreader rollers in contact with one another crush or wedge litter before reaching channel-shaped Wells are avoided, and that the transport process over the entire arrangement of rotating rotating Spreading rollers run flawlessly. This will further improve it Intermediate storage in the channel-shaped depressions achieved, which then by turning the spreading rollers further, an exact spreading from these Permits intermediate bunkers on the underlying surface.

Gemäß kennzeichnendem Merkmal des Anspruchs 9 wird gemäß der Erfindung vorgeschlagen, daß der Winkel zwischen den ersten und zweiten gleichlangen, kanalförmigen Vertiefungen größer 0 Grad und kleiner 180 Grad ist. Hierdurch erscheinen bei mehreren hintereinander angeordneten erfindungsgemäß ausgestalteten, rotierenden Streuwalzen im Bereich der Berührung der Mantelflächen eine Reihe schachtartiger Vertiefungen, die jeweils durch Stege in Richtung der Längsachse der Streuwalzen in Umfangsrichtung der Streuwalzen für die von oben d.h. vom Bunker kommenden Streupartikel abgeschlossen sind. Durch die unter dem erfindungsgemäß genannten Winkel schrägstehenden Streuschächten, wird eine Befüllung der Streuschächte erleichtert.According to the characterizing feature of claim 9 is according to the invention suggested that the angle between the first and second be of equal length, is channel-shaped depressions greater than 0 degrees and less than 180 degrees. hereby appear according to the invention in the case of a plurality arranged one behind the other designed, rotating spreader rollers in the area of contact with the lateral surfaces a series of manhole-like depressions, each by means of webs in the direction of the longitudinal axis of the spreading rollers in the circumferential direction of the spreading rollers for those from above i.e. Litter particles coming from the bunker completed are. Due to the angle mentioned according to the invention filling sloping chutes is made easier.

In noch weiterer Ausgestaltung der erfindungsgemäßen Vorrichtung wird in Anspruch 10 vorgeschlagen, daß die jeweiligen kanalförmigen Abschnitte an ihren Enden am Walzenmantel halbkreisförmige Bogen tragen. Durch die Anordnung halbkreisförmiger Bogen wird das Verhaken von Streupartikeln beim Befüllen und Entleeren der kanalförmigen Abschnitte erleichtert. In yet another embodiment of the device according to the invention, in Claim 10 proposed that the respective channel-shaped sections wear semicircular arches at the ends of the roller shell. Through the Arrangement of semicircular arches will get the scattering particles caught Filling and emptying the channel-shaped sections easier.

In noch weiterer Ausgestaltung der erfindungsgemäßen Vorrichtung, insbesondere in Verbindung mit dem erfinderischen Kennzeichen gemäß Anspruch 10 wird in Anspruch 11 unter Schutz gestellt, daß die kanalförmigen Abschnitte ausgehend vom Walzenmantel bis zum Kanalgrund senkrecht zur Richtung der Kanalachse abgerundet sind. Auch diese Ausgestaltung des Kanals fördert sowohl das Befüllen als auch das Entleeren der kanalförmigen Abschnitte; es dient auch dazu ein Quetschen von über die Streuwalzen weiterzufördernden Streupartikel an die nächsten Streuwalzen der Förderstreuvorrichtung, welche den Förderstreuvorgang bewirkt, zu erleichtern.In yet another embodiment of the device according to the invention, in particular in conjunction with the inventive feature according to claim 10 is protected in claim 11 that the channel-shaped sections starting from the roll jacket to the channel base perpendicular to the direction of the Channel axis are rounded. This design of the channel also promotes both filling and emptying the channel-shaped sections; it also serves to squeeze conveyed on the spreading rollers Spreading particles to the next spreading rollers of the conveyor spreading device, which facilitates the spreading process.

Eine weitere Ausgestaltung der erfindungsgemäßen kanalförmigen Abschnitte besteht gemäß Anspruch 12 darin, daß die kanalförmigen Abschnitte gerundete Querschnitte tragen. Diese erfindungsgemäße Ausgestaltung trägt zur Sauberhaltung der kanalförmigen Abschnitte bei.Another embodiment of the channel-shaped sections according to the invention according to claim 12 is that the channel-shaped sections are rounded Wear cross sections. This configuration according to the invention helps to keep it clean of the channel-shaped sections.

Die gemäß Anspruch 13 unter Schutz zu stellende Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche dient insbesondere zur Durchführung des Verfahrens nach einem oder mehreren der Ansprüche 1-6 und zeichnet sich dadurch aus, daß jede Streuwalze aus mindestens zwei in Achsrichtung hintereinander angeordneten Walzenhülsen mit gleichlangen, kanalförmigen Vertiefungen besteht und daß die Stege über die gesamte Mantellänge der Streuwalze einen nicht unterbrochenen Verlauf besitzen. Durch die Herstellung der Streuwalzen aus Walzenhülsen wird erstens eine beachtliche Gewichtseinsparung gegenüber Vollwalzen erreicht, bei zugrundelegen des selben Außendurchmessers, und es werden weiterhin bei der Herstellung der Walzenoberfläche beachtliche Einsparungen dadurch erreicht, daß beliebige Streuwalzenlängen aus einer einzigen Walzenhülseneinheit in Art eines Baukastensystems zusammengestetzt werden können, ohne daß für die Herstellung besonders langer und schlanker Streuwalzen zusätzlicher Werkzeugaufwand betrieben werden muß. Auch kann durch Aufteilung der gesamten Länge der Streuwalzen in verschieden lange Walzenhülsenstücke eine Durchbiegung der aus Walzenhülsen hergestellten Streuwalze begegnet werden.The device to be protected according to claim 13 according to one or several of the preceding claims are used in particular for implementation of the method according to one or more of claims 1-6 and is distinguished characterized in that each spreader roller from at least two in the axial direction roller sleeves arranged one behind the other with channel lengths of equal length There are depressions and that the webs over the entire length of the jacket Spreading roller have an uninterrupted course. Through the Firstly, the production of the spreader rollers from roller sleeves is a remarkable one Weight saving compared to full rolls achieved, based on the same outer diameter, and it will continue to be used in the manufacture of the Roll surface achieved considerable savings in that any Spreading roller lengths from a single roller sleeve unit in the manner of a Modular system can be put together without having to manufacture extra long and slim spreading rollers additional tool effort must be operated. Can also by dividing the entire length deflection of the spreader rollers into roller sleeve pieces of different lengths the spreader roller made from roller sleeves are encountered.

In Ausgestaltung der Vorrichtung nach Anspruch 13 wird in Anspruch 14 Schutz dafür begehrt, daß zwischen den Streuwalzenhülsen auftretende sichtbare umlaufende Stoßkante bei mindestens zwei hintereinander angeordneten Streuwalzen gegenseitig nicht fluchtend angeordnet sind. Hierduch wird erreicht, daß von den Stoßkanten keine schädlichen Einflüsse über die gesamte Reihe der rotierenden Streuwalzen ausgehen.In an embodiment of the device according to claim 13, claim 14 Protection is sought for that visible between the spreader roller sleeves circumferential butt edge with at least two consecutively arranged Spreading rollers are not aligned with each other. This is achieved that there are no harmful influences from the abutting edges over the entire Run out row of rotating spreader rollers.

In noch weiterer Ausgestaltung nach Anspruch 13 wird gemäß Anspruch 15 unter Schutz gestellt, daß zwischen den Hülsen auftretende sichtbare Stoßkanten sich spiralförmig über die Manteloberfläche der einzelnen Streuwalze erstrecken. Auch diese Ausgestaltung dient zur Vermeidung eventuell auftretender Fehlerquellen durch die Stoßkanten.In yet another embodiment according to claim 13, according to claim 15 Protection provided that visible abutting edges appearing between the sleeves spiral over the surface of the individual spreader roller extend. This configuration also serves to avoid any occurring Sources of error due to the abutting edges.

Die gemäß Anspruch 16 unter Schutz zu stellende Maßnahme besteht darin, daß zwei Hülsen eine zwischen den Hülsen auftretende Stoßkante, außerhalb der Mitte zwischen den beiden Walzenflächen, angeordnet ist. Dies stellt eine besonders bevorzugte Ausgestaltung des Erfindungsgegenstandes dar, im Hinblick auf die Vermeidung der Durchbiegung hülsenförmiger Streuwalzen. The measure to be protected according to claim 16 is that two sleeves an abutting edge between the sleeves, outside the Middle between the two roller surfaces, is arranged. This represents one represents particularly preferred embodiment of the subject of the invention, with regard to avoid the deflection of sleeve-shaped spreader rollers.

Im Hinblick auf die Ausgestaltung der kanalförmigen Abschnitte und zur Durchführung des erfinderischen Verfahrens nach den Anprüchen 1-6 wird gemäß Anspruch 17 vorgeschlagen, daß der Abstand (die Tiefe) zwischen Streuwalzenmanteloberfläche und Kanalgrund der kanalförmigen Abschnitte von Streuwalze zu Streuwalze ein verschiedenes Maß besitzen. Hiermit wird ermöglicht, daß über die Transportstrecke, also im Bereich des Förderstreuvorgangs, zusätzliches Material in den kanalförmigen Abschnitten der stromab- oder stromaufliegenden Streuwalzenpaare zwischengespeichert werden kann. Damit wird zum einen bei gleichbleibender Streugüte der Durchsatz bei derartigen Förderstreuvorgängen erhöht, und zum anderen wird eine Beeinflußung der Streuqualität vermieden.With regard to the design of the channel-shaped sections and Implementation of the inventive method according to claims 1-6 is according to Claim 17 suggested that the distance (depth) between the surface of the spreader roll and channel bottom of the channel-shaped sections of Spreading roller to spreading roller have a different dimension. This enables that over the transport route, i.e. in the area of the conveyor spreading process, additional material in the channel-shaped sections of the downstream or upstream pairs of spreading rollers are temporarily stored can. On the one hand, this increases the throughput with the same spread quality such conveyor spreading increases, and on the other hand is an interference the spreading quality avoided.

Die in Anspruch 18 unter Schutz gestellte Vorrichtung, die ebenfalls eine Ausgestaltung der erfindungsgemäßen Vorrichtung darstellt, dient auch zur Durchführung des Verfahren nach den Ansprüchen 1-6, wenn im Anspruch 18 unter Schutz gestellt wird, daß der Abstand (die Tiefe) zwischen Streuwalzenmanteloberfläche und Kanalgrund der kanalförmigen Abschnitte über die Länge der einzelnen Streuwalze ein verschiedenes Maß besitzen. Durch diese Anordnung der höheren Füllbarkeit quer zur Fortschrittsrichtung des in Entstehung begriffenen Vlieses, welches anschließend zu Holzwerkstoff- oder ähnlichen Platten verarbeitet wird, dient dazu bei diesen Holzwerkstoffplatten eine höhere Dichte im Randbereich zu bewirken, was gegebenenfalls bei einer späteren Nut- und Federverarbeitung derartiger Platten von Vorteil sein kann.The device protected in claim 18, which is also a Design of the device according to the invention also serves for Carrying out the method according to claims 1-6, if in claim 18 under Protection is provided that the distance (depth) between the surface of the spreader roller and channel bottom of the channel-shaped sections over the length of the individual spreader roller have different dimensions. By this arrangement the higher fillability across the direction of progress in the making conceived fleece, which subsequently to wood-based or Similar boards are processed, is used for these wood-based panels to cause a higher density in the edge area, which if necessary in a later tongue and groove processing of such plates is an advantage can be.

In noch weiterer Ausgestaltung gemäß Anspruch 19 der erfindungsgemäßen Vorrichtung wird vorgeschlagen, daß die nicht unterbrochenen Stege an der Streuwalzenmanteloberfläche in Schneiden auslaufen. Hierduch wird erreicht, daß die Partikeldurchsatzmenge beachtlich steigerbar ist; daß kein Quetschen der Streupartikel auftritt; und daß darüber hinaus ein wohldefinierter Abwurf aus den Zwischenspeichern gleichmäßig erfolgt.In yet another embodiment according to claim 19 of the invention Device is proposed that the non-interrupted webs on the Run out the surface of the spreader roller jacket in the cutting edges. This is achieved that the particle throughput can be increased considerably; that no Crushing of the scattering particles occurs; and that beyond that a well-defined Ejection from the intermediate storage takes place evenly.

Gemäß weiterer Ausgestaltung der vorliegenden Erfindung wird in Anspruch 20 eine Verwendung des Abwälzverfahrens oder des Druck- oder des Spritzgußverfahrens bei der Herstellung der Oberflächen der Streuwalzen nach den Ansprüchen 7-19 zur Durchführung des Verfahrens nach einem oder mehreren der Ansprüche 1-6 der vorliegenden Erfindung unter Schutz gestellt.According to a further embodiment of the present invention, claim 20 a use of the hobbing process or the pressure or the injection molding process in the manufacture of the surfaces of the spreader rollers according to the claims 7-19 for performing the method according to one or more of the Claims 1-6 of the present invention are protected.

Gemäß Anspruch 21 zeichnen sich nach der Verwendung hergestellte Streuwalzen dadurch aus, daß deren Manteloberfläche anschließend einem spanabhebenden Bearbeitunsvorgang unterworfen werden. Durch die mechanische Bearbeitung der Manteloberfläche wird erstmals erreicht, daß für einen Förderstreuvorgang vorgesehene Streuwalzen auch bei direkter Berührung ihrer Walzenmäntel erstmals eine eindeutige Zwischenspeicherung des zur Streuung erforderlichen Partikelstroms ermöglichen.According to claim 21, spreading rollers produced after use are distinguished characterized in that the surface of its shell is subsequently machined Processing process are subjected. By mechanical processing the surface of the jacket is achieved for the first time for a conveyor spreading process provided spreader rollers even when their roller jackets are in direct contact for the first time an unambiguous intermediate storage of what is required for scattering Enable particle flow.

Erfindungsgemäß wird also erstmals durch die erfinderischen Streuwalzenreihen mit glatter, durchbrochender Oberfläche erreicht, daß wohldefiniert aus einem Strom, bestehend aus Partikeln verschiedener Abmessungen, kontinuierlich ein Vlies gebildet wird, bei welchem je nach Bewegungsrichtung der Unterlage für die Aufnahme und/oder die Anordnung der den Förderstreuvorgang durchführenden hintereinander angeordneten erfindungsgemäßen Streuwalzen über der Unterlage ein Vlies erzeugen, dessen Querschnitt von der Außenschicht beginnend mit feinen Partikeln bis zu einer Schicht mit gröberen oder groben Partikeln kontinuierlich gebildet wird, und von hier aus in kontinuierlicher Weiterbildung bis zur anderen Außenschicht des Vlieses mit ebenfalls wieder feinen Partikeln verläuft.According to the invention, this is for the first time thanks to the inventive rows of spreading rollers achieved with a smooth, breakthrough surface that well defined a stream consisting of particles of different dimensions, continuously a fleece is formed in which, depending on the direction of movement Document for the reception and / or the arrangement of the conveyor spreading process performing inventive arranged one behind the other Spreading rollers create a fleece over the base, the cross-section of the outer layer starting with fine particles up to a layer with coarser or coarse particles are continuously formed, and from here from in continuous training to the other outer layer of the Fleece runs with fine particles again.

Es ist natürlich verständlich, ein derart hergestelltes Vlies für sich allein oder Teile dieses zur Verblankung anderer Vliese zu verwenden, um hieraus durch Verpressung Holzwerkstoff- oder ähnliche Platten zu erzeugen.It is understandable, of course, for a nonwoven fabric produced in this way to use alone or parts of this to bare other fleeces to produce wood-based panels or similar panels from this.

In der nachfolgenden Beschreibung wird die Erfindung anhand von Ausführungsbeispielen mehr erläutert:In the following description, the invention is based on exemplary embodiments explained more:

Es zeigen in schematicher Darstellung

Figur 1)
eine Einrichtung zur Herstellung eines Teilvlieses gemäß erfinderischem Verfahren,
Figur 2)
erfindungsgemäße Streuwalzenhülsen in Abwicklung mit Zentrierstiften,
Figur 3a)
eine vergrößerte Ansicht der Anordnung der erfindungsgemäßen kanalförmigen Vertiefungen,
Figur 3b)
einen Schnitt A-A gemäß Figur 3a),
Figur 3c)
einen Schnitt B-B gemäß Figur 3b),
Figur 4)
eine aus zwei erfinderischen Hülsen bestehende Streuwalze und
Figur 5)
eine aus mehreren erfindungsgemäßen Hülsen bestehende Streuwalze in Zusammenwirken mit einer zweiten, ebenfalls aus mehreren Hülsen bestehenden weiteren Streuwalze.
They show a schematic representation
Figure 1)
a device for producing a partial nonwoven according to the inventive method,
Figure 2)
spreading roller sleeves according to the invention in development with centering pins,
Figure 3a)
2 shows an enlarged view of the arrangement of the channel-shaped depressions according to the invention,
Figure 3b)
a section AA according to Figure 3a),
Figure 3c)
4 shows a section BB according to FIG. 3b),
Figure 4)
a spreading roller consisting of two inventive sleeves and
Figure 5)
a spreader roller consisting of several sleeves according to the invention in cooperation with a second, further spreader roller also consisting of several sleeves.

In der nachfolgenden Beschreibung werden dieselben Bauteile in den verschiedenen Figuren mit denselben Bezugsziffern bezeichnet.In the following description, the same components in the different Figures with the same reference numerals.

Gemäß Figur 1 werden aus einem Bunker 1 gespeicherte Streupartikel 2 über einen Austrag 3 einer Streustation 4 zugeführt, deren Breite der Breite einer Unterlage 5 entspricht, auf welcher ein Spänevlies 6 erzeugt wird, welches anschließend in einer nicht dargestellten Presstation kontinuierlich oder diskontinuierlich zu Holzwerkstoffplatten verpresst wird.According to FIG. 1, litter particles 2 are stored in a bunker 1 a discharge 3 fed to a scattering station 4, the width of which is the width corresponds to a base 5 on which a chip fleece 6 is produced, which then continuously in a press station, not shown or is pressed discontinuously into wood-based panels.

Durch Bewegung eines Bunkerbodenbandes 7 in Pfeilrichtung werden die gespeicherten Streupartikel 2 zunächst gegen Austragswalzen 8 des Bunkers 1 bewegt, die sich ebenfalls in Pfeilrichtung bewegen, und somit aus dem Bunkervorrat Streupartikel herauslösen, welche über einen Schacht 9 Vorauflösewalze 10 zugeführt werden.By moving a bunker belt 7 in the direction of the arrow, the stored Scattering particles 2 initially against discharge rollers 8 of the bunker 1 moves, which also move in the direction of the arrow, and thus from the Remove the bunker from the scattering particles, which 9 pre-dissolving roller through a shaft 10 are supplied.

Die Vorauflösewalzen befinden sich bereits in der Streustation und verteilen die Streupartikel zufolge ihrer Rotation in Pfeilrichtung, in Längsrichtung der Streustation 4.The pre-dissolving rollers are already in the spreading station and distribute the scattering particles according to their rotation in the direction of the arrow, in Longitudinal direction of the spreading station 4.

Unterhalb der Vorauflösewalzen 10 ist eine Reihe von Streuwalzen 11 dargestellt, von welchen lediglich die erste und letzte der Streuwalzen mit der Bezugsziffer 11 bezeichnet wurde. Im Ausführungsbeispiel sind die restlichen 10 Streuwalzen 11 die sich wie die erste und letzte Streuwalze 11 im Uhrzeigersinn drehen, der Übersichtlichkeit halber nicht mit den Bezugszeichen 11 bezeichnet, am Ende dieser Reihe von Streuwalzen 11, welche ebenfalls über die gesamte Breite der Unterlage 5 sich erstrecken, ist eine Rückführschnecke 12 angeordnet, welche dazu dient, Streupartikel, welche zufolge ihrer Größe während des Förderstreuvorgangs nicht durch die Streuwalzen 11 hindurchgeführt werden konnten, aufzufangen und über geeignete Leitungen wieder dem Bunker 1 zurückzuführen oder fehlerhaftes Material, beispielsweise Leimklumpen, aus dem Förderstreuvorgang herauszufördern, um über die Rückführschnecke 12 ausgeschieden zu werden.A number of spreading rollers 11 is shown below the pre-dissolving rollers 10, of which only the first and last of the spreading rollers with the Reference number 11 was designated. The rest are in the exemplary embodiment 10 spreader rollers 11 which are like the first and last spreader rollers 11 in Turn clockwise, not for the sake of clarity with the reference symbols 11, at the end of this row of spreader rollers 11, which also To extend over the entire width of the base 5 is one Return screw 12 arranged, which serves to scatter particles, which due to their size, not through the spreading rollers during the conveyor spreading process 11 could be led through, to catch and over suitable Return lines to bunker 1 or faulty material, for example lumps of glue to convey out of the conveyor spreading process in order to to be excreted via the return screw 12.

Im Ausführungsbeispiel drehen sich alle 12 Streuwalzen 11 in derselben Richtung, d.h. in Richtung des Uhrzeigersinnes. Es ist jedoch auch möglich, daß die Streuwalzen 11 insgesamt in entgegengesetzter Richtung drehen. Hierfür ist es dann erforderlich, daß die Rückführschnecke 12 am anderen Ende der Streuwalzen 11 angeordnet ist, um zu vermeiden, daß Fehlgut auf die Unterlage 5 zur Bildung des Vlieses 6 aufgebracht wird, und somit die äußerste Schicht des zu verpressenden Vlieses negativ beeinflußt.In the exemplary embodiment, all 12 spreader rollers 11 rotate in the same Direction, i.e. in a clockwise direction. However, it is also possible that the spreader rollers 11 rotate in total in the opposite direction. This then requires that the return screw 12 on the other End of the spreader rollers 11 is arranged in order to avoid that defective goods on the pad 5 is applied to form the fleece 6, and thus the outermost layer of the fleece to be pressed is adversely affected.

Auch ist es denkbar, daß die Walzen 11 je für sich verschiedene Drehzahlen aufweisen, um zum einen beim Förderstreuvorgang entweder die Förderung des zu streuenden Partikelstroms zu einem Vlies zu beschleunigen, um einen höheren Durchsatz durch die Streuwalzen 11 zu erreichen, oder bei einer Verringerung der Geschwindigkeit der einzelnen Streuwalzen bei einer geringeren Menge von Streupartikeln 2 ebenfalls einen gleichmäßigen Durchtritt von zu streuendem Streugut Partikeln 2 durch die Streuwalzen 11 für die Herstellung eines gleichmäßigen Spänevlieses zu bewirken. It is also conceivable that the rollers 11 each have different speeds have to either the promotion of the accelerating particle flow to a fleece to a to achieve higher throughput by the spreader rollers 11, or at one Reduction of the speed of the individual spreading rollers at one smaller amount of scattering particles 2 also a smooth passage of to be scattered particles 2 by the spreading rollers 11 for to produce a uniform chip fleece.

Zufolge dieser Vorgehensweise wird ein Spänevlies 6 erzeugt, welches zwischen der ersten und zweiten Streuwalze 11, von rechts gesehen, stets die unterste Schicht des später zu verpressenden Spänevlieses 6 bildet, während die 11. und 12. Streuwalze, ebenfalls von rechts gesehen, zwischen sich die oberste Schicht des Spänevlieses 6 auf die vorhergehenden Zwischenschichten auflegen.As a result of this procedure, a chip fleece 6 is produced, which between the first and second spreader roller 11, seen from the right, always the forms the bottom layer of the chip fleece 6 to be pressed later, while the 11th and 12th spreader rollers, also seen from the right, between the top layer of the chip fleece 6 on the previous Apply intermediate layers.

Wird nunmehr eine weitere Streustation 4 in einer Kopf an Kopfstellung angeordnet, so ergibt sich bei Durchlaufen des Vlieses durch diese Doppelstreustation ein komplettes Spänevlies, welches aus der unteren Deckschicht, erzeugt durch die erste und zweite Streuwalze, gebildet wird und eine obere Deckschicht erhält, die durch die beiden letzten Streuwalzen 11, eine spiegelbildlich zur Streuwalze 4 angeordnete nicht dargestellte weitere Streuwalze 4, aufgebracht wird, die stromab von der dargestellten Streustation 4 sich befindet.If a further scattering station 4 is now arranged in a head to head position, this results when the fleece passes through this double spreading station a complete chip fleece, which consists of the lower cover layer, generated by the first and second spreader rollers, is formed and receives an upper cover layer, which is covered by the two last spreading rollers 11, a mirror image of the spreader roller 4, not shown further spreader roller 4 is applied, which is downstream of the illustrated Spreading station 4 is located.

Gemäß Figur 2 ist eine Abwicklung 13 des Mantels von Streuwalzenhülsen 14, 15 dargestellt, wie auf den Abwicklungen 13 ersichtlich, sind über den Umfang der Streuwalzenhülsen 14, 15 gleichlange kanalförmige Vertiefungen 16 bzw. 17 vorgesehen, welche je für sich über die Länge der Streuwalzenhülse Etagen 18 bilden und wobei jede kanalförmige Vertiefung 16 der einen Etage 18 mit jeder kanalförmigen Vertiefung 17 der anderen Etage 18 mit ihren Kanalachsen 19 bzw. 20 einen Winkel einschließen, der im Ausführungsbeispiel größer als 90 Grad in Bezug zu einer Streuwalzenachse 21 (vergleiche beispielsweise Figur 4) ist. According to Figure 2 is a development 13 of the jacket of spreader roller sleeves 14, 15, as can be seen on the developments 13, are about the scope the spreader roller sleeves 14, 15 have channel-shaped depressions 16 of equal length or 17 is provided, each for the length of the spreader roller sleeve Levels 18 form and each channel-shaped recess 16 of one level 18 with each channel-shaped recess 17 of the other tier 18 with their channel axes 19 and 20 enclose an angle, which in the exemplary embodiment greater than 90 degrees with respect to a spreader roller axis 21 (compare, for example Figure 4).

Die Steuwalzenhülsen 14, 15 besitzen eine bestimmte Länge und es kann somit durch Aneinanderreihung mehrerer derartiger Streuwalzenhülsen 14, 15 eine Streuwalze erhalten werden, bei welcher die Verbindung zwischen den einzelnen Hülsen 14, 15 über Positionier- und Arretierungsstifte 22 erfolgt (vergleiche auch beispielsweise Figur 4), so daß lediglich an den beiden äußersten Streuwalzenhülsen 14, 15 (vergleiche Figur 4) Lagerachsen 23, 24 angeordnet werden müssen, um die einzelne aus Streuwalzenhülsen 14, 15 beispielsweise bestehend Streuwalze 11 in einer nicht dargestellten Lagerung innerhalb der Streustation 4 zu lagern. Wie in Figur 1; hier angezeigt, können alle Streuwalzen 11 in einem; hier dargestellten Walzenstuhl 25 angeordnet sein. Der Walzenstuhl 25 selbst kann heb- und senkbar (nicht dargestellt) oder neigbar zur Unterlage 5 (ebenfalls nicht dargestellt) angeordnet sein. Durch ein heben bzw. senken und/oder ein neigen des Walzenstuhls 25 zur Unterlage 5 kann der Streuweg zwischen der Austrittsebene aus den kanalförmigen Vertiefungen 16 bzw. 17 aus allen Etagen in vorgebener Höhe und auch in Abhängigkeit des Anstieges des zu verpressenden Vlieses über dem sich im Aufbau befindlichen Vlies angeordnet werden. Damit wird erreicht, daß keinerlei Veränderung bei der Streuung der als Zwischenspeicher dienenden kanalförmigen Vertiefungen bis zum Auftreffen auf der Unterlage 5 oder zum Auftreffen auf die bereits in Entstehung begriffene Vliesschicht erfolgt.The control roller sleeves 14, 15 have a certain length and thus it can by lining up several such spreader roller sleeves 14, 15 one Spreading roller can be obtained in which the connection between the individual Sleeves 14, 15 via positioning and locking pins 22 (see also for example Figure 4), so that only the two outermost Spreading roller sleeves 14, 15 (see FIG. 4) bearing axles 23, 24 are arranged need to be the individual from spreader roller sleeves 14, 15 for example consisting of spreader roller 11 in a storage, not shown to be stored within the spreading station 4. As in Figure 1; displayed here can all spreader rollers 11 in one; Roller mill 25 shown here be arranged. The roller mill 25 itself can be raised and lowered (not shown) or tiltable to the base 5 (also not shown) be arranged. By lifting or lowering and / or tilting the Roller mill 25 to the base 5 can be the scattering path between the exit plane from the channel-shaped recesses 16 and 17 from all floors at the specified amount and also depending on the increase in the amount to be pressed Fleece arranged above the fleece under construction become. This ensures that no change in the spread of the serving as a buffer channel-shaped depressions up to Hitting on the pad 5 or hitting the already in Realized nonwoven layer takes place.

Wird bei Beibehalten der Hebe- und Senkmöglichkeit des Walzenstuhls 25 und seiner Neigungsfähigkeit ein größerer Abstand 26 gewählt, zwischen der Unterkante des Walzenstuhls 25 und der kontinuierlich bewegten Unterlage 5, so kann in diesem Bereich durch geringfügige Absaugung oder Zugabe von Wind aus der Streukammer 4 oder in die Streukammer 4 hinein, der Streuvorgang beeinflußt werden, hierdurch entsteht dann eine gewollte Separierung, welche durch Einwirken einer Luftströmung bewirkt wird.Will while maintaining the lifting and lowering of the roller mill 25 and its inclination a larger distance 26 chosen between the lower edge the roller mill 25 and the continuously moving support 5, so in this area by slight suction or addition of wind from the scattering chamber 4 or into the scattering chamber 4, the spreading process are influenced, this then creates a deliberate separation, which is caused by the action of an air flow.

In Figur 3a ist ein vergrößerter Ausschnitt aus der Abwicklung 13 gemäß Figur 2 gewählt worden, um zu verdeutlichen, daß zwischen den kanalförmigen Vertiefungen 16 bzw. 17 Etagenstege 27 bzw. 28 vorgesehen sind, und auch zwischen den kanalförmigen Vertiefungen 16 und 17 Stege 29 vorgesehen sind, die sich über die gesamte Länge der Streuwalzenhülsen 14, 15 erstrecken.FIG. 3a shows an enlarged section from the development 13 according to FIG 2 was chosen to clarify that between the channel-shaped Wells 16 and 17 floor webs 27 and 28 are provided, and also webs 29 are provided between the channel-shaped depressions 16 and 17, which extend over the entire length of the spreader roller sleeves 14, 15.

Mit Hilfe der Positionier- und Arretierstifte 22 wird erreicht, daß sowohl die Stege 29 in Längsrichtung der kompletten Streuwalze ohne Unterbrechung verlaufen und somit einen Abschluß der kanalförmigen Vertiefungen 16 bzw. 17 in Durchtrittsrichtung für die Partikel bilden; gleichzeitig bewirken die Arretier- und Positionierstifte 22 auch, daß beim Übergang von einer Streuwalzenhülse zur nächsten Streuwalzenhülse auch die kanalförmigen Vertiefungen 16 bzw. 17 einen glatten Übergang erhalten.With the help of the positioning and locking pins 22 it is achieved that both the webs 29 in the longitudinal direction of the complete spreader roller without interruption run and thus a conclusion of the channel-shaped recesses 16 or 17 form in the direction of passage for the particles; effect at the same time the locking and positioning pins 22 also that in the transition from one Spreading roller sleeve to the next spreader roller sleeve also the channel-shaped depressions 16 or 17 get a smooth transition.

Gemäß Figur 3b ist ein Schnitt längs einer kanalförmigen Vertiefung 16 dargestellt, wie daraus zu ersehen, sind die Enden des Kanalgrundes 30 halbkreisförmig 31 zum Mantel 32 der Streuwalze 11 geführt.3b shows a section along a channel-shaped depression 16, as can be seen from this, the ends of the channel base 30 are semicircular 31 led to the jacket 32 of the spreader roller 11.

In der Figur 3c, welche einen Schnitt gemäß B-B gemäß Figur 3a darstellt, ist zu erkennen, daß die kanalförmigen Vertiefungen 16 bzw. 17 halbkreisförmig ausgebildet sind, und daß der jeweilige Kanalgrund 30 einen Abstand 33 bis zur Manteloberfläche der Streuwalze 11 besitzt. Denselben Abstand 33 besitzt auch der Kanalgrund 30 von der Manteloberfläche 32 der Streuwalze 11. 3c, which shows a section according to B-B according to FIG. 3a, it can be seen that the channel-shaped depressions 16 and 17 are semicircular are formed, and that the respective channel base 30 a distance 33 to the surface of the surface of the spreader roller 11. The same distance 33 also has the channel base 30 from the jacket surface 32 of the spreader roller 11th

Durch spanabhebende Bearbeitung oder durch Spritzguß oder Druckgußverfahren ist es nun möglich, den Abstand 33 zwischen Manteloberfläche 32 der einzelnen Streuwalze und dem Kanalgrund 30 zu verändern. Damit wird das Volumen der einzelnen kanalförmigen Vertiefung vergrößert. Diese Vergrößerung des Volumens kann auch noch durch Verringerung der Etagenstegbreiten 27 bzw. 28 und der Stege 29 erreicht werden, so daß zwischen den kanalförmigen Vertiefungen 16 bzw. 17 lediglich noch Halsschneiden 34 wie in Figur 3c; hier dargestellt, an der Streuwalzenoberfläche 32 der Streuwalze 11 stehenbleiben. Dasselbe gilt für die dann entstehenden Schneiden zwischen den kanalförmigen Vertiefungen 16 und 17.By machining or by injection molding or die casting it is now possible to determine the distance 33 between the jacket surface 32 of the individual Spreading roller and the channel base 30 to change. So that is the volume of the individual channel-shaped recess enlarged. This enlargement of the Volume can also be reduced by reducing the width of the landing land 27 or 28 and the webs 29 can be reached so that between the channel-shaped depressions 16 and 17 are only neck cutters 34 as in FIG. 3c; here shown, remain on the spreader roller surface 32 of the spreader roller 11. The same applies to the resulting cutting edges between the channel-shaped ones Wells 16 and 17.

Werden die Streuwalzen 11 stromab mit jeweils sich vergrößernden kanalförmigen Vertiefungen ausgerüstet, so läßt sich ohne weiteres erkennen, daß hierdurch ein wesentlich höherer Durchsatz von Streupartikeln durch die aneinander anschließenden Streuwalzen durchgesetzt werden kann ohne daß ein Zusetzen oder ein Verklemmen beim Durchgang der Streupartikel durch die Streuwalzen 11 auftreten kann. Die größte kanalförmige Vertiefung ist hierbei stets kleiner gewählt als die nicht zur Ablage kommenden Teile, die über die Rückführschnecke 12 ausgetragen werden. Eine derartige Größenbestimmung läßt sich dadurch verwirklichen, daß zufolge der glatten Mantelfläche aller Streuwalzen 11 eine Festlegung des größten noch durchzulassenden Partikels bestimmt werden kann.The spreader rollers 11 are downstream with each increasing channel-shaped Wells equipped, so it can be easily seen that thereby a significantly higher throughput of scattering particles through the adjoining spreading rollers can be enforced without a Clogging or jamming when the scattering particles pass through the Spreading rollers 11 can occur. The largest channel-shaped depression is here always chosen smaller than the parts that are not stored, the are discharged via the return screw 12. Such a size determination can be realized in that, according to the smooth surface of all spreading rollers 11 a determination of the largest still to be let through Particle can be determined.

In Figur 5 sind zwei hintereinander angeordnete Streuwalzen 11 dargestellt, bei welchen die eine Streuwalze aus Streuwalzenhülsen 14 besteht, während die andere Streuwalze 11 aus Streuwalzenhülsen 15 und weiteren Streuwalzenhülsen 35 besteht. Wie aus der Zeichnung ersichtlich, schließen die Streuwalzen 11 dicht aneinander an und auftretende Stoßkanten 35 bzw. 36 sind versetzt über die Länge der Streuwalzen 11 zueinander angeordnet. Damit ist ausgeschlossen, daß durch diese Stoßkanten Streufehler auftreten können. Anstelle der in einer Ebene umlaufenden Stoßkanten 35 bzw. 36 können auch spiralförmige Stoßkanten zwischen den einzelnen Streuwalzenhülsen 14, 15, 35 verwendet werden.5 shows two spreader rollers 11 arranged one behind the other, where the one spreader roller consists of spreader roller sleeves 14, while the other spreader roller 11 from spreader roller sleeves 15 and other spreader roller sleeves 35 exists. As can be seen from the drawing, the spreader rollers close 11 are close to each other and occurring abutting edges 35 and 36, respectively staggered over the length of the spreader rollers 11 to each other. So that is excluded that scattering errors can occur due to these abutting edges. Instead of the abutting edges 35 and 36 in one plane can also spiral abutting edges between the individual spreader roller sleeves 14, 15, 35 can be used.

Wie Figur 4 außerdem darstellt ist bei der Verwendung von zwei Streuwalzenhülsen 14 und 15 die Stoßkante dieser beiden Streuwalzenhülsen außerhalb der Mitte angeordnet. Eine derartige Kombination verschieden langer Streuwalzenhülsen 14, 15 zur Erzeugung einer Streuwalze 11 sind geeignet die Durchbiegung einer nicht aus Streuwalzenhülsen bestehenden Streuwalze zu verringern.As FIG. 4 also shows, when using two spreader roller sleeves 14 and 15 the abutting edge of these two spreader roller sleeves arranged outside the center. Such a combination is different long spreader roller sleeves 14, 15 for producing a spreader roller 11 suitable the deflection of a non-spreader roller sleeves Reduce spreading roller.

Wird der Abstand 33 des Kanalgrundes 30 von der Manteloberfläche 32 nicht in Förderrichtung der Streuwalzen verändert, sondern in Längsrichtung jeder einzelnen Streuwalze, beispielsweise ausgehend von der Mitte der Streuwalze zu ihren beiden Enden, dergestalt, daß der Abstand 33 an den Enden jeder Walze am größten ist, so ergibt sich hieraus ein Vlies 6, welches im unverpressten Zustand einen konvexen Aufbau des Vlieses zeigt. Durch verpressen diesen konvexen Vlieses wird dann eine Holzwerkstoffplatte erzielt, welche an ihren Rändern eine erhöhte Festigkeit aufweist. Dies kann, wie bereits offenbart, vorteilhaft dann herangezogen werden, wenn derartige Holzwerkstoffplatten direkt mittels Feder und Nut miteinander verbunden werden sollen.If the distance 33 of the channel base 30 from the jacket surface 32 does not changed in the conveying direction of the spreader rollers, but in the longitudinal direction of each individual spreader roller, for example starting from the center of the spreader roller to their two ends so that the distance 33 at the ends of each Roller is largest, this results in a fleece 6, which in uncompressed state shows a convex structure of the fleece. By A wood-based panel is then pressed into this convex fleece achieved, which has increased strength at its edges. This can, as already disclosed, be used advantageously if such wood-based panels directly with each other by means of tongue and groove should be connected.

Claims (21)

  1. A method for the continuous production of a continuous web (6) from stored particles (2) of differing dimensions by means of a conveyor-spreading process for the purposes of producing boards of wood-material or similar boards by subsequently compressing the web, wherein intermediate stocks are deliberately and continuously formed during the conveyor-spreading process over the whole spreading-width and the spreading-length of the conveyor-spreading process so that individual spreading processes can be effected from said intermediate stocks for continuously forming the continuous web (6), and wherein the conveyor-spreading process is carried out by a series of parallel spreading rollers which extend along the continuously formed web, characterised in that the spreading rollers adjoin one another very closely, and in that the periphery of each spreading roller comprises a plurality of parallel rows of mutually separated channel-like depressions (16, 17) by means of which defined quantities of chips of limited size are discharged per unit of time at particular rotational speeds of the spreading rollers.
  2. A method in accordance with Claim 1, characterised in that, for the purposes of obtaining a defined lamination of specific chip dimensions in the web, the depth of the channel-like depressions in a spreading roller is altered in relation to the next spreading roller parallel thereto.
  3. A method in accordance with Claim 1, characterised in that, for the purposes of obtaining a convex cross-sectional profile at the side edge of the web, the depth of the channel-like depressions in a spreading roller differs in the axial direction.
  4. A method in accordance with one or more of the preceding Claims, characterised in that particles, which are not suitable for the conveyor-spreading process (11), are separately discharged from the conveyor-spreading process (11) by means of a conveyor passage (12).
  5. A method in accordance with Claim 4, characterised in that the discharged particles are supplied to a regrinding process whereby recoverable particles (2) are fed back into the circulation system at the end of the process whereas non-recoverable particles are discarded.
  6. A method in accordance with one or more of the preceding Claims, characterised in that a preselectable separation of the particles is effected in dependence on the particles provided for the spreading process and in dependence on the formation of the continuous web by means of the conveyor-spreading process.
  7. A device for the continuous production of a continuous web from stored particles of differing dimensions including a bunker (6) for spread-particles (2) having a discharge means (3), a spreading station (4) which is adjoined thereto and the width of which corresponds to the width of a web that is to be produced, and including a series of rotating spreading rollers (11) which are arranged in the spreading station (4) and the respective outer surfaces whereof carry a structure, and a base member (5) which is moved continuously under the spreading station (4) for receiving a , spread-chip web (6) that is intended to be subsequently compressed for producing boards of wood-material or similar boards, characterised in that the spreading rollers adjoin one another very closely,
    in that a plurality of mutually adjacent first and second rows (16, 17) of equal-length channels are arranged in the outer surface of each spreading roller in the peripheral direction thereof, said respective channels being parallel wherein the channels in the adjacent rows are mutually displaced through an angle,
    in that each channel-like depression is separated from the other channels by webs (27 and 28) on the outer surface, and in that the respective first and second rows of channel-like depressions (16, 17) are separated in the axial direction of each spreading roller (11) by webs (29) over the whole length of the outer surface of the spreading roller (11) so that each channel-like depression (16 or 17) represents a separate depression in the outer surface.
  8. A device in accordance with Claim 7, characterised in that each spreading roller has first equal-length channel-like depressions (16) which are inclined relative to the axis thereof, in that there are provided a plurality of rows of second equal-length channel-like depressions (17) which are displaced relative to said first equal-length channel-like depressions wherein the respective channel axes (19 and 20) thereof are disposed at an angle relative to the inclined channel axes of the first equal-length channel-like depression [sic] (16).
  9. A device in accordance with one or more of the preceding Claims, characterised in that the angle between the first (16) and the second (17) equal-length channel-like depressions is greater than 0 degrees and smaller than 180 degrees.
  10. A device in accordance with one or more of the preceding Claims, characterised in that the ends of the respective channel-like sections (16 and 17) on the outer surface (32) of the rollers are in the form of semicircular curves (31).
  11. A device in accordance with one or more of the preceding Claims, characterised in that, starting from the outer surface (32) of the roller and extending down to the base of the channel, the channel-like sections (16 and 17) are rounded in a direction perpendicular to that of the channel axes (19 and 20).
  12. A device in accordance with one or more of the preceding Claims, characterised in that the channel-like sections (16 and 17) have a rounded cross-section.
  13. A device in accordance with one or more of the preceding Claims, especially for carrying out the method according to one or more of Claims 1 - 6, characterised in that each spreading roller (11) consists of at least two roller sleeves (14, 15) that are arranged one behind the other in the axial direction and incorporate channel-like depressions (16 and 17) of equal length, and in that the webs (29) have an unbroken profile over the total length of the outer surface of the spreading roller (11).
  14. A device in accordance with Claim 13, characterised in that the visible peripheral impact edges (35, 36) occurring between the sleeves are not mutually flush in the case of at least two successive spreading rollers (11).
  15. A device in accordance with Claim 13, characterised in that the visible impact edges (35, 36) that occur between the sleeves (14, 15, 35) extend in a spiral over the outer surface of the individual spreading rollers (11).
  16. A device in accordance with one or more of the preceding Claims, especially Claim 13, characterised in that, in the case of two sleeves (14, 15), an impact edge (35 or 36) that occurs between the spreading sleeves (14, 15) is arranged between the end-faces of the two spreading rollers outside the centre.
  17. A device for carrying out the method according to Claim 1 - 6 in accordance with one or more of the Claims 7 - 16, especially Claim 11, characterised in that the spacing (the depth) (33) between the outer surfaces (32) of the spreading rollers and the bases of the channels (30) of the channel-like sections (16, 17) varies in size from spreading roller (11) to spreading roller (11).
  18. A device in accordance with one or more of the Claims 7 - 16, especially Claim 11, for carrying out the method according to Claims 1 - 6, characterised in that the spacing (the depth) (33) between the outer surfaces (32) of the spreading rollers and the bases of the channels (30) of the channel-like sections (16 and 17) and the lengths of the individual spreading rollers (11) vary in size.
  19. A device in accordance with one or more of the preceding Claims, characterised in that the uninterrupted webs (27 and 28, 29) run out in knife edges (34) on the outer surfaces of the spreading rollers.
  20. A device in accordance with Claim 7, characterised in that the production of the outer surfaces (32) of the spreading rollers (11) is effected by a hobbing process, a diecasting process or an injection moulding process.
  21. A device in accordance with Claim 20, wherein the outer surface (32) of the spreading rollers (11) is subsequently subjected to a chip removing process.
EP96105712A 1996-04-11 1996-04-11 Method for continuous manufacturing of a mat for boards of wooden or like material Expired - Lifetime EP0800902B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP96105712A EP0800902B1 (en) 1996-04-11 1996-04-11 Method for continuous manufacturing of a mat for boards of wooden or like material
DE59608838T DE59608838D1 (en) 1996-04-11 1996-04-11 Process for the continuous production of a nonwoven for the production of wood-based panels or similar boards
US08/833,464 US5887515A (en) 1996-04-11 1997-04-07 Method for the continuous production of a mat for the manufacture of boards of wood material or the like
CA002202343A CA2202343A1 (en) 1996-04-11 1997-04-10 A method for the continuous production of a mat for the manufacture of boards of wood material or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96105712A EP0800902B1 (en) 1996-04-11 1996-04-11 Method for continuous manufacturing of a mat for boards of wooden or like material

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EP0800902A1 EP0800902A1 (en) 1997-10-15
EP0800902B1 true EP0800902B1 (en) 2002-03-06

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EP (1) EP0800902B1 (en)
CA (1) CA2202343A1 (en)
DE (1) DE59608838D1 (en)

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DE202016103820U1 (en) 2016-07-14 2017-10-19 Dieffenbacher GmbH Maschinen- und Anlagenbau Scattering plant for the production of a spreading material mat in the course of the production of material plates
DE102016113014A1 (en) 2016-07-14 2018-01-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Scattering system and method for producing a spreading material mat in the course of the production of material plates
DE202017106263U1 (en) 2017-10-16 2018-10-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Scattering plant for the production of a spreading material mat in the course of the production of material plates

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DE202016103820U1 (en) 2016-07-14 2017-10-19 Dieffenbacher GmbH Maschinen- und Anlagenbau Scattering plant for the production of a spreading material mat in the course of the production of material plates
DE102016113014A1 (en) 2016-07-14 2018-01-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Scattering system and method for producing a spreading material mat in the course of the production of material plates
WO2018011430A1 (en) 2016-07-14 2018-01-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Scattering installation and method for producing a mat of scattered material during the course of the production of material panels
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
DE202017106263U1 (en) 2017-10-16 2018-10-18 Dieffenbacher GmbH Maschinen- und Anlagenbau Scattering plant for the production of a spreading material mat in the course of the production of material plates

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CA2202343A1 (en) 1997-10-11
EP0800902A1 (en) 1997-10-15
US5887515A (en) 1999-03-30

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