EP2598298B1 - Scattering head of a scattering installation for at least partially producing a scattered particle mat, and method for producing a scattered particle mat in the course of producing material boards - Google Patents
Scattering head of a scattering installation for at least partially producing a scattered particle mat, and method for producing a scattered particle mat in the course of producing material boards Download PDFInfo
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- EP2598298B1 EP2598298B1 EP11738210.1A EP11738210A EP2598298B1 EP 2598298 B1 EP2598298 B1 EP 2598298B1 EP 11738210 A EP11738210 A EP 11738210A EP 2598298 B1 EP2598298 B1 EP 2598298B1
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- scattering
- scattered
- producing
- head
- grit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
Definitions
- the invention relates to a spreading head of a scattering system for at least partially producing a spreading material mat according to the preamble of claim 1 and to a method for producing a spreading material mat in the course of the production of material plates according to the preamble of claim 6.
- a mixture of particles or fibrous materials and a binder is scattered to a grit mat on a forming or conveyor belt, the grit mat is then fed to any necessary pretreatment and finally a compression.
- the compression can be carried out continuously or discontinuously by means of pressure and / or heat.
- MDF boards consisting of medium density fibers or OSB plates from oriented scattered chips. Scattering occurs in one or more plies as needed, with the need for multiple plies typically occurring with thicker sheets or with multilayer sheets. But also in the thin plate production can be different layers be desired, especially if specially differentiated requirements between the middle layer and the outer layers exist.
- a high throughput of grit and with an oriented scattering arise stray or other basis weight inaccuracies in a scattered Grit mat, which worsen the later quality of the material plate.
- the transverse scattering to the production direction is problematic, since imprecise basis weight distributions are unavoidable, especially in the edge regions. Also effects on the surface area weight distribution far away from the longitudinal edges of the spreading material mat can not be completely eliminated.
- the entire transverse orientation of the material to be spread with fan rollers of a transverse orientation device has an inaccuracy of only +/- 10% per scattering head. As a result, grit mats with a high proportion of transversely oriented layers have a high scattering inaccuracy.
- a scattering head requires a minimum length for producing a sufficiently large scattering space above the scattering rolls, in which the spreading material can be optimally distributed and dissolved in order to achieve good values of a basis weight distribution.
- the spreading material is sorted by size and / or density by means of a separating device, usually a roller scraping head or an air classifier, and deposited successively on a forming belt. As a rule, the fine grit is first on the Formed band deposited, then the coarser grit is scattered over the fines. This gives a grit mat containing a fine topcoat and a second coarser layer.
- a coarse layer and / or a fine layer are sprinkled again. This results in a middle layer of similar coarse grit and two layers of fine grit.
- systems for the production of oriented chipboard (OSB) work exactly opposite, because here the long chips are preferably laid longitudinally oriented on the forming belt as a cover layer and the shorter and broken chips are scattered in the middle layer oriented transversely.
- the invention has for its object to provide a scattering head, with which a material plate of at least two different layers can be produced, with respect to the prior art in terms of simpler design now and the associated lower investment costs advantages are achievable. Furthermore, an improvement of the basis weight distributions overall in the grit mat is to be achieved by a method to be created and a grit mat that can be produced with it.
- the solution for a scattering head is that for the scattering of the grit a transverse orientation device and / or a longitudinal orientation device are arranged together with a spoke scattering device in the production direction in any order on the forming belt.
- the invention for the method in that the grit is oriented in the production direction in any order with a transverse orientation device and / or a longitudinal orientation device and scattered unoriented on the forming belt with a spreader spreader.
- the neutral fiber of an OSB board should not necessarily be formed by an oriented scattered layer, but advantageously by an unoriented but very uniform layer.
- spoke rollers as a storage and distribution device for the grit on a forming belt, it is now possible for only three scattered heads produce a three-layer oriented scattered material plate on the outside, depending on requirements and production request longitudinally or transversely scattered grit and in the Middle layer has an optimized with respect to the basis weight grit layer, which can optimally process in particular bending stresses by mutual loads in their middle layer without Show detachment phenomena.
- the multi-axial orientation of the material to be spread in the middle layer and the additional portions of fines increase the rigidity and strength of the material plate.
- a preferred five-layer material plate is produced from a grit mat which is spread out longitudinally, laterally in the following layer, unoriented in the middle and then again scattered transversely and outwardly in the direction of production. Overall, therefore, in the case of the material plates, an improvement in the transverse strength and in the thickness swelling occurs.
- orientable grit in particular grit, which is used for the production of oriented scattered material plates
- spokes directly on a forming belt.
- the optimum straightening accuracy over the surface is based on the fact that the spoke rollers can optimally distribute the spreading material over a given area, which also applies in particular to orientable material.
- the spoke spreading device in question consists of spoke rollers, which are also called cage rollers. These spoked rollers are commonly used for dissolving and distributing a grit stream before the grit is discharged from a bunker onto spreader rolls of the transverse or longitudinal orienting nature. This is for example in the US 5,662,227 A ( FIG. 2 ) already disclosed.
- the cage rollers or similar constructions shown here are known to those skilled in the art.
- the cage or spoke rollers consist of a width across the width of the forming belt centrally arranged roller, which has a disk on the outside, again at the periphery of the discs rods, wires, Pipes, or similar machine elements, are fixed, which are arranged parallel to the central rotating roller.
- the individual spreaders are arranged in a predetermined order.
- the spreaders are in a plane and / or at the same distance from the forming belt.
- the common feature is that the longitudinal orientation, the transverse orientation and the spreader device should be the closest to the forming belt scattering and storage device.
- a term suitable for this would be arranged directly above the forming belt. Any necessary dissolution device would thus be arranged in the direction of the scattering material above the scattering devices, but may for example in addition to the known spiked or pin rollers also consist of an array of spoke rollers, which dissolve the grit before hitting the scatterers.
- two scattering heads of the type according to the invention are used, which are arranged mirror-inverted in the direction of production.
- FIG. 1 shows a schematic and lateral sectional view of a scattering head 1 according to the invention and a circulating in the production direction 13 below the scattering head 1 forming belt 8 for transporting the part formed by the scattering head 1 or independent grit 7.
- the grit material 7 is omitted due to the clarity on it with different Patterns or shades of gray for each layer. Instead, there are indications of different spreaders, which store a predetermined amount of grit 3 on the forming belt 8 in their own area.
- the grit 3 is entered in the illustrated scattering head 1 by means of a dosing devices not shown in detail (grit hopper with discharge or the like).
- the task angle in the scattering head 1 is usually controlled by a task flap 16, which at the same time also assumes a task function of the scattering material 3 on an optional opening device 11.
- the opening device 11 is preferably made of spiked rollers 9, depending on the application in different sizes or features of the spines.
- the dissolving device 11 causes a large-area distribution of the material to be spread 3 in the spreading head 1, in particular a separation 20 (shown schematically below the forming belt) of the material to be spread 3 in a coarser fraction G and a finer fraction F over the length (in the production direction 13) of the Litter Head 1.
- FIG. 2 shows a Doppelkopfstreustrom 17 for producing a three-layer grit mat 7 by means of two mirror image mutually arranged scattering heads 1.
- the separation 20 of the two scattering heads 1 is also in the production direction 13 also arranged opposite to each other, so that after formation of a cover layer of transverse scattered scattered material 3 by means of a Transverse orientation device a two-fold scattering of unoriented grit 3 from the two spoke scattering devices of the two scattering heads 1 connects.
- This twofold scattering effects a homogeneous layer of unoriented spreading material 3, which in turn is covered in the production direction (on the outlet side of the left scattering head 1) with a transversely oriented layer of spreading material 3, which ultimately results in the production of a three-layer spreading material mat composed of two oriented and one unoriented layer.
- FIG. 3 is an expanded embodiment of a possible scattering head 1 with three arranged in series different scattering devices, wherein in Production direction 13 is first a longitudinal orientation device 15 with disk rollers 5, a transverse orientation device 12 with fan rollers 2 and the output side a spreader device 14 with spoke rollers 4 is arranged. Again, the grit 3 is first separated after the task in the scattering head 3, so that there is a separation in the production direction 13 from coarse G to fine F and thus predominantly the coarse grit 3 on the longitudinal orientation device 15 and the fine grit 3 on the spoke scattering device 14 arrived. Depending on the setting or effect of the opening device 11, a corresponding proportion of spreading material 3 results, which is dispensed with the transverse orientation device 12 arranged in the middle.
- FIG. 4 becomes with the mirror image arrangement of two scattering heads 1 after FIG. 3 a Doppelkopfstreustrom 18 for producing a five-layer grit mat 7 shown.
- a longitudinally oriented layer of coarse spreading material 1 on the forming belt 8 is first applied from the right scattering head 1, followed by a transverse layer and an unoriented layer, on the output side of scattering head 1 on the right side.
- the scattering head 1 is again an unoriented layer of grit 3, then again a cross-oriented and finally again a longitudinally oriented layer.
- FIG. 5 shows a four-head litter 19 for producing a five-layer grit mat 7.
- the outside two pure scatter heads 1 are shown to form a longitudinally oriented layer.
- This arrangement is particularly advantageous in the production of container plates with a long spreading material (over 150 mm in length) on the outer layers.
- the spreading material is subjected to a separation 20 in these pure scattering heads 1 for longitudinal orientation.
- the two inner and in turn mirror images of each other arranged scattering heads 1 are like the scattering head after FIG. 1 executed and form three layers (transverse and unoriented) of the grit mat.
- FIG. 6 shows the schematic structure of a five-layer grit mat with two outer longitudinally oriented layers 21, two underlying transverse oriented layers 22 and a middle unoriented layer 23rd LIST OF REFERENCE NUMBERS 1.
- spreading head 16th task flap
- Second bin rollers 17th Double head spreading system (three layers)
- Third grit 4th spoke rollers 18th Double-head spreading system (five-layered) 5th disk rollers 6th distributor 19th Four-head scattering system (five-layered) 7th grit mat 8th.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Description
Die Erfindung betrifft einen Streukopf einer Streuanlage zur zumindest teilweisen Herstellung einer Streugutmatte nach dem Oberbegriff des Anspruches 1 und ein Verfahren zur Herstellung einer Streugutmatte im Zuge der Herstellung von Werkstoffplatten nach dem Oberbegriff des Anspruches 6.The invention relates to a spreading head of a scattering system for at least partially producing a spreading material mat according to the preamble of
Bei der Herstellung von Werkstoffplatten aus streufähigen Materialien wird ein Gemisch aus Partikeln oder faserigen Stoffen und einem Bindemittel zu einer Streugutmatte auf einem Form- oder Förderband gestreut, wobei die Streugutmatte anschließend einer ggf. nötigen Vorbehandlung und schließlich einer Verpressung zugeführt wird. Die Verpressung kann dabei kontinuierlich oder diskontinuierlich mittels Druck und/oder Wärme erfolgen. Bei den üblichen Werkstoffplatten, die hierbei hergestellt werden, handelt es sich in der Regel um MDF-Platten, bestehend aus mitteldichten Fasern oder um OSB-Platten aus orientiert gestreuten Spänen. Die Streuung erfolgt je nach Bedarf in einer oder mehreren Lagen, wobei die Notwendigkeit für mehrere Lagen üblicherweise bei dickeren Platten oder bei Mehrschichtplatten auftritt. Aber auch bei der Dünnplattenherstellung können unterschiedliche Lagen gewünscht sein, besonders wenn speziell differenzierte Anforderungen zwischen der Mittelschicht und den Deckschichten bestehen. Unterschieden werden in den Streustationen zwei Streumöglichkeiten; die direkte Streuung nach dem Streugutbunker, wobei mittels Leitblechen das Streugut direkt auf ein Formband geführt wird oder die indirekte Streuung über so genannte Streuwalzensysteme. Bei der indirekten Streuung fällt das aus dem Streugutbunker ausgetragene Streugut auf so genannte Streuwalzen, die das Streugut aufteilen und nötigenfalls auch sortieren. Die hierbei verwendeten Streuanordnungen sind in ihrer Vielfalt bereits hinreichend in der Patentliteratur beschrieben, wobei entweder eine mittige Aufgabe des Streugutes auf die Streuwalzen durchgeführt wird oder das Streugut an einem Ende der Streuwalzen aufgegeben wird. Dabei wird ein Teil der Späne weitertransportiert während ein anderer Teil durch die Streuwalzen hindurch solange auf das Formband fällt, bis nur noch ungeeignetes Streumaterial übrig bleibt und aus dem Herstellungsprozess entfernt werden muss. Beide Prinzipien haben sich bei der Produktion bewährt und werden mit Erfolg eingesetzt. Entsprechende Offenbarungen finden sich in:
Jede Streuung an Streugut, hier Späne oder Schnitzel, mit einem gewissen Feinanteil des Streugutes, bringt Probleme bei Herstellung hochgenauer Flächengewichtsverteilungen mit sich. Insbesondere bei einem hohen Durchsatz an Streugut und bei einer orientierten Streuung entstehen Streunester oder andere Flächengewichtsungenauigkeiten in einer gestreuten Streugutmatte, die die spätere Qualität der Werkstoffplatte verschlechtern. Dies gilt nicht nur bei gleicher Dichte und Qualität des Streugutes sondern auch bei inhomogener Materialwahl wie zum Beispiel bei Kunststoffplatten mit Substituten oder anderen Mischungen.Any scattering of grit, here shavings or chips, with a certain fine fraction of the grit, causes problems in the production of high-precision basis weight distributions. In particular, with a high throughput of grit and with an oriented scattering arise stray or other basis weight inaccuracies in a scattered Grit mat, which worsen the later quality of the material plate. This applies not only for the same density and quality of the material to be spread but also for inhomogeneous material choice such as plastic plates with substitutes or other mixtures.
Insbesondere ist aber bei der Herstellung von orientiert gestreuten Streugutmatten die Querstreuung zur Produktionsrichtung problematisch, da insbesondere in den Randbereichen ungenaue Flächengewichts-verteilungen unvermeidbar sind. Auch Auswirkungen auf die flächige Flächengewichtsverteilung fern der Längsränder der Streugutmatte sind nicht vollkommen abstellbar. Hinzu kommt, dass die gesamte Querorientierung des Streugutes mit Fächerwalzen einer Querorientierungsvorrichtung eine Streugenauigkeit von nur +/-10% pro Streukopf aufweist. In der Folge weisen Streugutmatten mit einem hohen Anteil an quer orientierten Schichten eine hohe Streuungenauigkeit auf. Gleichzeitig benötigt aber ein Streukopf eine Mindestlänge zur Herstellung eines ausreichend großen Streuraumes über den Streuwalzen, in dem das Streugut optimal verteilt und aufgelöst werden kann um gute Werte einer Flächengewichtsverteilung zu erzielen. Es sind aus dem Stand der Technik unterschiedliche Streukopfvarianten für Streumaschinen bekannt. Bei einer Spanstreuung für Spanplatten wird das Streugut mittels einer Separiervorrichtung, meist ein Walzenstreukopf oder ein Windsichter, nach Größe und/oder Dichte sortiert und nacheinander auf einem Formband abgelegt. Dabei wird in der Regel das feine Streugut zuerst auf dem Formband abgelegt, anschließend wird das gröbere Streugut über das Feingut gestreut. Damit erhält man eine Streugutmatte, die eine feine Deckschicht und eine zweite gröbere Schicht enthält. Je nach Verfahren oder Streumaschinenanordnung und -ausführung werden nun nochmals eine grobe Schicht und/oder nochmals eine feine Schicht aufgestreut. Es ergibt sich somit eine Mittelschicht aus gleichartigem gröberem Streugut und zwei Deckschichten aus feinem Streugut. Im Gegensatz hierzu arbeiten Anlagen für die Herstellung von orientiert gestreuten Spanplatten (OSB) genau entgegengesetzt, denn hier werden die langen Späne vorzugsweise längs orientiert auf dem Formband als Deckschicht abgelegt und die kürzeren und gebrochenen Späne werden in die Mittelschicht quer orientiert gestreut.In particular, however, in the production of oriented scattered grit mats, the transverse scattering to the production direction is problematic, since imprecise basis weight distributions are unavoidable, especially in the edge regions. Also effects on the surface area weight distribution far away from the longitudinal edges of the spreading material mat can not be completely eliminated. In addition, the entire transverse orientation of the material to be spread with fan rollers of a transverse orientation device has an inaccuracy of only +/- 10% per scattering head. As a result, grit mats with a high proportion of transversely oriented layers have a high scattering inaccuracy. At the same time, however, a scattering head requires a minimum length for producing a sufficiently large scattering space above the scattering rolls, in which the spreading material can be optimally distributed and dissolved in order to achieve good values of a basis weight distribution. There are known from the prior art different Streukopfvarianten for spreaders. In the case of chip spreading for chipboard, the spreading material is sorted by size and / or density by means of a separating device, usually a roller scraping head or an air classifier, and deposited successively on a forming belt. As a rule, the fine grit is first on the Formed band deposited, then the coarser grit is scattered over the fines. This gives a grit mat containing a fine topcoat and a second coarser layer. Depending on the method or scattering machine arrangement and execution, a coarse layer and / or a fine layer are sprinkled again. This results in a middle layer of similar coarse grit and two layers of fine grit. In contrast, systems for the production of oriented chipboard (OSB) work exactly opposite, because here the long chips are preferably laid longitudinally oriented on the forming belt as a cover layer and the shorter and broken chips are scattered in the middle layer oriented transversely.
Der Erfindung liegt die Aufgabe zugrunde einen Streukopf zu schaffen, mit welchen eine Werkstoffplatte aus zumindest zwei verschiedenen Schichten produzierbar ist, wobei gegenüber dem Stand der Technik hinsichtlich des nun einfacheren konstruktiven Aufbaus und der damit verbundenen geringeren Investitionskosten Vorteile erzielbar sind. Weiter soll durch ein zu schaffendes Verfahren und eine damit herstellbare Streugutmatte eine Verbesserung der Flächengewichtsverteilungen insgesamt in der Streugutmatte erreichbar sein.The invention has for its object to provide a scattering head, with which a material plate of at least two different layers can be produced, with respect to the prior art in terms of simpler design now and the associated lower investment costs advantages are achievable. Furthermore, an improvement of the basis weight distributions overall in the grit mat is to be achieved by a method to be created and a grit mat that can be produced with it.
Die Lösung für einen Streukopf besteht darin, dass zur Streuung des Streuguts eine Querorientierungsvorrichtung und/oder eine Längsorientierungsvorrichtung zusammen mit einer Speichenstreuvorrichtung in Produktionsrichtung in beliebiger Reihenfolge über dem Formband angeordnet sind.The solution for a scattering head is that for the scattering of the grit a transverse orientation device and / or a longitudinal orientation device are arranged together with a spoke scattering device in the production direction in any order on the forming belt.
Diese Aufgabe löst die Erfindung für das Verfahren dadurch, dass das Streugut in Produktionsrichtung in beliebiger Reihenfolge mit einer Querorientierungsvorrichtung und/oder einer Längsorientierungsvorrichtung orientiert und mit einer Speichenstreuvorrichtung unorientiert auf dem Formband abgestreut wird.This object is achieved by the invention for the method in that the grit is oriented in the production direction in any order with a transverse orientation device and / or a longitudinal orientation device and scattered unoriented on the forming belt with a spreader spreader.
Das erfindungsgemäße Verfahren und der erfindungsgemäße Streukopf einer Streurnaschine weisen folgende signifikante Vorteile gegenüber dem Stand der Technik auf:
- Die vorgeschlagene Streuvorrichtung, besonders der Streukopf und die Streuanlage, neigt insbesondere in der in den Figuren dargegestellten Variante, geringer zur Verstopfung oder Nestbildung an Streugut, da die größeren Streugutpartikel mittels einer Auflösevorrichtung in Richtung der Längs- und/oder Querorientierungsvorrichtungen bewegt werden, wohingegen das kleinerer Material an Streugutpartikeln den Speichenwalzen zugeführt wird. Die Orientierung und Ablage von im Wesentlichen gleichartigen Streugutpartikeln ist grundsätzlich von Vorteil und weniger störungsanfällig. Weiter werden nun die kleineren Partikel durch die Speichenwalzen in höchst optimaler Weise gleichmäßig verteilt und auf das Formband bzw. eine bereits darauf liegende Schicht einer Streugutmatte abgelegt. Dies hilft insbesondere die Vorgaben und Wünsche der Hersteller von orientiert gestreuten Platten (OSB) umzusetzen.
- The proposed scattering device, in particular the scattering head and the scattering system, in particular in the variant shown in the figures, is less prone to clogging or nesting of spreading material, since the larger spreading material particles by means of a dissolving device in the direction of Longitudinal and / or transverse orientation devices are moved, whereas the smaller material is supplied to the sprocket particles of grit particles. The orientation and storage of substantially similar grit particles is always beneficial and less prone to failure. Next, the smaller particles are now evenly distributed by the spoke rollers in a highly optimal manner and placed on the forming belt or an already lying layer of a grit mat. This helps in particular to implement the specifications and wishes of the manufacturers of oriented scattered boards (OSB).
Insbesondere ist eine Lehre der Erfindung, dass es nicht unbedingt notwendig ist eine Mittelschicht aus orientiert gestreutem Streugut zu erstellen. Im Gegenteil ist man diesseits der Auffassung, dass die neutrale Faser einer OSB-Platte nicht unbedingt von einer orientiert gestreuten Schicht gebildet werden sollte, sondern in vorteilhafter Weise von einer unorientierten aber dafür sehr gleichmäßigen Schicht. Durch die Anwendung der Speichenwalzen als Ablage- und Verteilvorrichtung für das Streugut auf einem Formband ist es nun erstmals möglich mit nur zwei Streuköpfen eine dreischichtige orientiert gestreute Werkstoffplatte zu erzeugen, die außenseitig, je nach Bedarf und Produktionswunsch längs oder quer gestreutes Streugut aufweist und in der Mittelschicht eine hinsichtlich des Flächengewichts optimierte Streugutschicht aufweist, die insbesondere Biegespannungen durch wechselseitige Belastungen optimal in ihrer Mittelschicht verarbeiten kann ohne Ablösungserscheinungen zu zeigen. Insbesondere die Multiaxiale Ausrichtung des Streugutes in der Mittelschicht und die zusätzlichen Anteile an Feinstmaterial erhöhen die Steifigkeit und Festigkeit der Werkstoffplatte.In particular, a teaching of the invention that it is not absolutely necessary to create a middle layer of oriented scattered grit. On the contrary, it is believed that the neutral fiber of an OSB board should not necessarily be formed by an oriented scattered layer, but advantageously by an unoriented but very uniform layer. Through the use of the spoke rollers as a storage and distribution device for the grit on a forming belt, it is now possible for only three scattered heads produce a three-layer oriented scattered material plate on the outside, depending on requirements and production request longitudinally or transversely scattered grit and in the Middle layer has an optimized with respect to the basis weight grit layer, which can optimally process in particular bending stresses by mutual loads in their middle layer without Show detachment phenomena. In particular, the multi-axial orientation of the material to be spread in the middle layer and the additional portions of fines increase the rigidity and strength of the material plate.
Mit entsprechenden Modifikationen sind natürlich auch beispielsweise fünf- oder siebenschichtige Werkstoffplatten herstellbar, wobei der Anordnung der unorientierten Schicht je nach Bedarf einstellbar ist. Eine bevorzugte fünfschichtige Werkstoffplatte wird aus einer Streugutmatte hergestellt, die außen längs, in der nachfolgenden Schicht quer, in der Mitte unorientiert und anschließend wieder quer und außen in Produktionsrichtung längs orientiert gestreut wird. Insgesamt stellt sich somit bei den Werkstoffplatten eine Verbesserung bei der Querzufestigkeit sowie bei der Dickenquellung ein.With appropriate modifications of course, for example, five- or seven-layer material plates can be produced, the arrangement of the unoriented layer is adjustable as needed. A preferred five-layer material plate is produced from a grit mat which is spread out longitudinally, laterally in the following layer, unoriented in the middle and then again scattered transversely and outwardly in the direction of production. Overall, therefore, in the case of the material plates, an improvement in the transverse strength and in the thickness swelling occurs.
Insbesondere ist die Erkenntnis von Vorteil, dass orientierbares Streugut, insbesondere Streugut, das für die Herstellung von orientiert gestreuten Werkstoffplatten benutzt wird, mittels Speichenwalzen direkt auf ein Formband abgelegt werden kann. Die optimale Streugenauigkeit über die Fläche basiert darauf, dass die Speichenwalzen das Streugut über eine vorgegebene Fläche optimal verteilen können, was insbesondere auch für orientierbares Material gilt.In particular, the finding is advantageous that orientable grit, in particular grit, which is used for the production of oriented scattered material plates, can be stored by means of spokes directly on a forming belt. The optimum straightening accuracy over the surface is based on the fact that the spoke rollers can optimally distribute the spreading material over a given area, which also applies in particular to orientable material.
Hinsichtlich der verwendeten Fachbegriffe werden diese in vorliegender Anmeldung wie folgt verstanden:
- Vorrichtungen zur Quer- und Längsorientierung richten das orientierbare Streugut quer- oder längs zur Produktionsrichtung im Streukopf aus und legen es auf das Formband ab. Diese Vorrichtungen bestehen zur Querorientierung üblicherweise aus Fächerwalzen, bei denen das Streugut in ein nach oben ausgerichtetes, über die ganze Länge der Walze offenes Fach fällt, sich dort quer zur Produktionsrichtung ausrichtet und dann durch die Rotation der Fächerwalze nach unten quer orientiert aus dem Fach auf das Formband fällt. Bei der Längsorientierungsvorrichtung werden meist in Produktionsrichtung parallel zueinander ausgerichtete Wände oder Scheibenwalzen verwendet. Scheibenwalzen weisen radial zur axialen Erstreckung der Walze ausgerichtete parallele Scheiben auf. Durch die Rotation wird ein Verstopfen vermieden und das Streugut wird längs (in Produktionsrichtung) ausgerichtet und fällt schließlich zwischen den einzelnen Walzen hindurch auf das Formband.
- Devices for transverse and longitudinal orientation align the orientable spreading material transversely or longitudinally to the production direction in the scattering head and set it off on the form band. These devices are for transverse orientation usually from fan rollers, in which the grit falls in an upwardly oriented over the entire length of the roller open tray, there aligns transversely to the production direction and then by the rotation of the fan roller downwardly oriented transversely out of the compartment the form band falls. In the longitudinal orientation device, walls or disk rolls oriented parallel to one another are usually used in the production direction. Disc rollers have radially aligned to the axial extent of the roller parallel discs. The rotation avoids clogging and the spreading material is aligned longitudinally (in the direction of production) and finally falls between the individual rolls on the forming belt.
Die in Rede stehende Speichenstreuvorrichtung besteht aus Speichenwalzen, die auch Käfigwalzen genannt werden. Diese Speichenwalzen werden üblicherweise zur Auflösung und Verteilung eines Streugutstromes benutzt, bevor das Streugut aus einem Bunker ausgetragen auf Streuwalzen der quer- oder längs orientierenden Art fällt. Dies ist zum Beispiel in der
In den vorgeschlagenen Vorrichtungen und Anlagen werden die einzelnen Streuvorrichtungen in vorgegebener Reihenfolge angeordnet. Vorzugsweise befinden sich die Streuvorrichtungen in einer Ebene und/oder in gleichem Abstand zum Formband. Es kann aber auch von Vorteil sein die einzelnen Streuvorrichtungen gegenüber dem Formband winkelig anzustellen oder in unterschiedlichen Höhen respektive Abständen zum Formband anzuordnen. Die Gemeinsamkeit liegt aber darin, dass die Längsorientierungs-, die Querorientierungs- und die Speichenstreuvorrichtung die zum Formband am nächsten gelegene Streu- und Ablagevorrichtung sein sollte. Ein hierzu geeigneter Begriff wäre unmittelbar über dem Formband angeordnet. Eine etwaige notwendige Auflösevorrichtung wäre demgemäß in Fallrichtung des Streugutes oberhalb der Streuvorrichtungen angeordnet, kann aber beispielsweise neben den bekannten Stachel- oder Stiftwalzen auch aus einer Anordnung von Speichenwalzen bestehen, die das Streugut vor dem Auftreffen auf die Streuvorrichtungen auflösen.In the proposed devices and systems, the individual spreaders are arranged in a predetermined order. Preferably, the spreaders are in a plane and / or at the same distance from the forming belt. But it may also be advantageous to make the individual spreaders with respect to the forming belt angled or to arrange at different heights or distances to the forming belt. The common feature, however, is that the longitudinal orientation, the transverse orientation and the spreader device should be the closest to the forming belt scattering and storage device. A term suitable for this would be arranged directly above the forming belt. Any necessary dissolution device would thus be arranged in the direction of the scattering material above the scattering devices, but may for example in addition to the known spiked or pin rollers also consist of an array of spoke rollers, which dissolve the grit before hitting the scatterers.
In einer Streuanlage werden bevorzugt zwei Streuköpfe der erfindungsgemäßen Art verwendet, die zueinander spiegelverkehrt in Produktionsrichtung angeordnet sind.In a scattering system preferably two scattering heads of the type according to the invention are used, which are arranged mirror-inverted in the direction of production.
Insbesondere ergibt sich bei Verwendung des oben genannten Verfahrens und/oder der oben genannten Anlage und/oder eines oben genannten Streukopfes eine Streugutmatte, die zumindest eine orientierte Schicht angrenzend zu einer unorientierten Schicht an Streugut aufweist.In particular, results from using the above method and / or the above system and / or one of the above Streussopfes a grit mat having at least one oriented layer adjacent to an unoriented layer of grit.
Weitere vorteilhafte Maßnahmen und Ausgestaltungen des Gegenstandes der Erfindung gehen aus den Unteransprüchen und der folgenden Beschreibung mit der Zeichnung hervor.Further advantageous measures and embodiments of the subject matter of the invention will become apparent from the dependent claims and the following description with the drawing.
Es zeigen:
Figur 1- eine schematische und seitliche Schnittansicht eines erfindungsgemäßen Streukopfes und ein in Produktionsrichtung unterhalb des Streukopfes umlaufendes Formband,
Figur 2- eine gleichartige Schnittansicht durch zwei Streuköpfe (nach
Figur 1 ) einer Streuanlage zur Herstellung einer dreischichtigen Streugutmatte, Figur 3- ein weiteres Ausführungsbeispiel eines Streukopfes mit drei unterschiedlichen Streuvorrichtungen in Reihe,
Figur 4- eine Streuanlage mit zwei Streuköpfen nach
Figur 3 zur Herstellung einer fünfschichtigen Streugutmatte, Figur 5- eine alternative Streuanlage zur Herstellung einer fünfschichtigen Streugutmatte mit zwei Streuköpfen nach
Figur 1 und außen liegenden Streuköpfen mit reiner Längsorientierung und Figur 6- ein schematischer Aufbau einer fünfschichtigen Streugutmatte.
- FIG. 1
- a schematic and lateral sectional view of a scattering head according to the invention and a circulating in the production direction below the scattering head molding strip,
- FIG. 2
- a similar sectional view through two scattering heads (after
FIG. 1 ) a spreading plant for producing a three-layer spreading material mat, - FIG. 3
- Another embodiment of a scattering head with three different scatterers in series,
- FIG. 4
- a spreader with two scatter heads after
FIG. 3 for producing a five-layer spreading material mat, - FIG. 5
- an alternative spreader for producing a five-layer grit mat with two scatter heads after
FIG. 1 and outer scattering heads with pure longitudinal orientation and - FIG. 6
- a schematic structure of a five-layer grit mat.
In
Claims (7)
- A scattering head (1) of a scattering installation for the production of at least a part of a scattered particle mat (7), which is scattered at least in a partly oriented manner and which is pressed in a press by means of pressure and/or heat in the course of producing material boards, wherein the scattered particle mat (7) is formed on a continuously circulating forming belt (8) arranged beneath the scattering head (1) in the falling direction of the scattered particles (3), characterized in that for scattering the scattered particles (3) a transverse orienting apparatus (12) and/or a longitudinal orienting apparatus (15) are arranged together with a spoke-type scattering apparatus (14) in any desired sequence in the direction of production (13) above the forming belt (8).
- A scattering head according to claim 1, characterized in that for scattering the scattered particles (4) at least one spoke roller (4) is arranged in the spoke-type scattering apparatus (14), at least one flap drum (2) in the transverse orienting apparatus (12), and/or at least one disc roller (5) in the longitudinal orienting apparatus (5).
- A scattering head according to claim 1 or 2, characterized in that the transverse orienting apparatus (12) and/or the longitudinal orienting apparatus (15) and the spoke-type scattering apparatus (14) are arranged in substantially one plane in the scattering head (1).
- A scattering head according to one or several of the preceding claims, characterized in that the transverse orienting apparatus (12), the longitudinal orienting apparatus (15) and/or the spoke-type scattering apparatus (14) are arranged directly above the forming belt (8).
- A scattering head according to one or several of the preceding claims, characterized in that at least one disintegration apparatus (11) is arranged in the falling direction of the scattered particles (3) before the transverse orienting apparatus (12) and/or the longitudinal orienting apparatus (15) and/or the spoke-type scattering apparatus (14).
- A method for producing a scattered particle mat (7), which is scattered at least partly in an oriented fashion, with a scattering head (1) in the course of producing material boards by means of pressure and/or heat in a press, wherein the scattered particle mat (7) is formed at least partly by the scattering head (1) on a continuously circulating forming belt (8) arranged beneath the scattering head (1) in the falling direction of the scattered particles (3), characterized in that the scattered particles are scattered onto the forming belt (8) in an oriented manner in the production direction (13) in random sequence by a transverse orienting apparatus (12) and/or a longitudinal orienting apparatus (15) and in a non-oriented manner by a spoke-type scattering apparatus (14).
- A method according to claim 6, characterized in that the scattered particles (3) are disintegrated prior to scattering by means of a disintegration apparatus (11) in the scattering head (1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010038434 DE102010038434A1 (en) | 2010-07-26 | 2010-07-26 | Scattering head of a scattering system for the at least partial production of a grit mat, scattering system and method for producing a grit mat in the course of the production of material plates and a grit mat for this purpose |
PCT/EP2011/062855 WO2012016888A1 (en) | 2010-07-26 | 2011-07-26 | Scattering head of a scattering installation for at least partially producing a scattered particle mat, scattering installation and method for producing a scattered particle mat in the course of producing material boards and a scattered particle mat for this purpose |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2598298A1 EP2598298A1 (en) | 2013-06-05 |
EP2598298B1 true EP2598298B1 (en) | 2015-02-11 |
Family
ID=44629274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11738210.1A Not-in-force EP2598298B1 (en) | 2010-07-26 | 2011-07-26 | Scattering head of a scattering installation for at least partially producing a scattered particle mat, and method for producing a scattered particle mat in the course of producing material boards |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2598298B1 (en) |
CN (1) | CN103124620B (en) |
DE (1) | DE102010038434A1 (en) |
WO (1) | WO2012016888A1 (en) |
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DE202016102898U1 (en) | 2016-05-31 | 2017-08-01 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Scattering plant for producing a multi-layer spreading material mat for pressing to material plates and a material plate |
DE202016102900U1 (en) | 2016-05-31 | 2017-09-01 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Plant for producing a material plate |
DE202016102907U1 (en) | 2016-05-31 | 2017-09-01 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Forming station for producing a multi-layer spreading material mat for pressing into material plates and a spreading material mat |
DE102016110070A1 (en) | 2016-05-31 | 2017-11-30 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Plant and method for producing a material plate |
DE102016110068A1 (en) | 2016-05-31 | 2017-11-30 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Scattering system and method for producing a multilayer grit mat for pressing to material plates and a material plate |
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EP2559530A1 (en) | 2011-08-17 | 2013-02-20 | Swedspan International s.r.o. | Apparatus and method for producing layered mats |
US10356885B2 (en) | 2015-09-04 | 2019-07-16 | Signify Holding B.V. | Installing and commissioning transceivers coupled to loads |
DE102017111093B4 (en) * | 2017-05-22 | 2020-01-30 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Spreading system for producing a spreading material mat and method for operating such a spreading system |
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FI98276C (en) | 1995-02-06 | 1997-05-26 | Sunds Defibrator Loviisa Oy | Apparatus for length screening of elongated particles |
FI101869B (en) * | 1997-02-07 | 1998-09-15 | Sunds Defibrator Loviisa Oy | Method and apparatus for making a structural product blank and a structural blank |
FI101949B (en) * | 1997-02-20 | 1998-09-30 | Sunds Defibrator Loviisa Oy | Process and plant for preparing a structural product substance e |
DE19846108B4 (en) * | 1998-10-07 | 2013-10-31 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Roller for spreading and braking free-flowing materials |
DE19846106A1 (en) * | 1998-10-07 | 2000-04-13 | Dieffenbacher Schenck Panel | Spreading station |
DE10206595A1 (en) * | 2002-02-15 | 2003-08-28 | Dieffenbacher Gmbh Maschf | Assembly to scatter glued wood chips, for the production of chipboards, has a roller sieve scattering unit between the supply bunker and the scattering head system, to separate out foreign bodies |
DE102007049947A1 (en) * | 2007-10-18 | 2009-04-30 | Dieffenbacher Gmbh + Co. Kg | Three-layer grit mat manufacturing method for manufacturing oriented strand board chip board, involves providing dividing device below breaking device for dividing falling chipping to transverse and longitudinal orientation devices |
-
2010
- 2010-07-26 DE DE201010038434 patent/DE102010038434A1/en not_active Withdrawn
-
2011
- 2011-07-26 EP EP11738210.1A patent/EP2598298B1/en not_active Not-in-force
- 2011-07-26 CN CN201180031025.2A patent/CN103124620B/en not_active Expired - Fee Related
- 2011-07-26 WO PCT/EP2011/062855 patent/WO2012016888A1/en active Application Filing
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WO2017207450A1 (en) | 2016-05-31 | 2017-12-07 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Forming station and method for producing a multilayered scattered particle mat for pressing into material boards and a scattered particle mat |
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Also Published As
Publication number | Publication date |
---|---|
CN103124620B (en) | 2015-07-22 |
EP2598298A1 (en) | 2013-06-05 |
CN103124620A (en) | 2013-05-29 |
WO2012016888A1 (en) | 2012-02-09 |
DE102010038434A1 (en) | 2012-01-26 |
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