EP0400359B1 - Method and device for the production of a coherent fleece of long fibres subsequently pressed into blocks or similar articles - Google Patents
Method and device for the production of a coherent fleece of long fibres subsequently pressed into blocks or similar articles Download PDFInfo
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- EP0400359B1 EP0400359B1 EP90108621A EP90108621A EP0400359B1 EP 0400359 B1 EP0400359 B1 EP 0400359B1 EP 90108621 A EP90108621 A EP 90108621A EP 90108621 A EP90108621 A EP 90108621A EP 0400359 B1 EP0400359 B1 EP 0400359B1
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- Prior art keywords
- slabs
- sticks
- breaking
- process according
- strand
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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
- B27N1/00—Pretreatment of moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/08—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood fibres, e.g. produced by tearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
- Y10T156/1067—Continuous longitudinal slitting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1062—Prior to assembly
- Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
- Y10T156/13—Severing followed by associating with part from same source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
- Y10T156/1317—Means feeding plural workpieces to be joined
- Y10T156/1322—Severing before bonding or assembling of parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/02—Other than completely through work thickness
- Y10T83/0267—Splitting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/02—Other than completely through work thickness
- Y10T83/0267—Splitting
- Y10T83/0274—By use of endless band or chain knife
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/02—Other than completely through work thickness
- Y10T83/0267—Splitting
- Y10T83/0296—With infeeding of work
Definitions
- the invention relates to a method and an apparatus for producing a coherent nonwoven from long splinters, which are produced by disassembling the supplied starting material and then compressed to form a nonwoven, which is subsequently glued and together with other nonwovens into blocks or the like. is pressed.
- a corresponding method and devices for carrying out the method can be found, for example, in DE-OS 27 16 748.
- the aim here is to create a compressed wood product which, in contrast to conventional chipboard, is composed of elongated chips, which are arranged largely parallel to each other. Natural wood is used as the starting material, which is impacted by squeeze rollers in such a way that the wood is broken down parallel to the fibers to form a still-connected nonwoven. To support this crushing resolution, longitudinal notches or the like can be inserted into the natural wood from above. be introduced.
- the invention has for its object to develop an improved method and an improved device for producing the nonwovens described above.
- the energy-consuming squeezing process is replaced by a fiber-parallel splitting process.
- the fiber composite is not only loosened according to the invention to a mat in which the fiber sections are still firmly connected, but the stacked starting material is split into individual, that is to say completely separate, longitudinal splinters, the cross sections of which are preferably on average 100 mm2, but maximum Should be 200 mm2.
- cutting movements should be carried out in connection with the preferably continuous feed of the parcel strand in such a way that a splitting process results in the wood material, that is to say an air gap precedes the knife edge in the wood.
- the splinters or rinds can be combined into individual bundles in the sawmill and separated from these bundles to form the endless bundle of packages. It is useful if the package strand is at a height is equalized, which is considerably smaller than the diameter of a collar.
- the splinters or rinds are acted upon from above with their compressive forces in order to compress the starting material, which is stacked on top of one another, during its longitudinal decomposition. Due to the longitudinal division of the splitters or rinds as a result of the repeated longitudinal splitting, internal tensions in the wood are released and lead to a fabric-like mat formed from loose longitudinal fragments lying next to or on top of one another. This mat-like structure is then compressed into a fleece by the tamping provided according to the invention. The pressure of the tamper can be adjusted so that the fiber composite can be loosened in a preselectable manner, which cannot be achieved with squeeze rollers.
- the long splinters are guided on paths crossing at an acute angle. This further supports the spreading effect which already results from the longitudinal splitting, in which the longitudinal splinters formed from a splitter are slightly deflected from the original conveying direction on both sides by the splitting knife, which divides them lengthwise, so that subsequently there is a different direction course.
- a particular advantage of the method according to the invention is that it does not process logs, but chisels and possibly rinds, which can normally be stacked on top of each other in several layers. In this case, raw material of any length can be used, while cut logs are required in the prior art. It is also advantageous that the process according to the invention can be used with controllable feed and cutting forces. According to the invention, the connection of the individual longitudinal splinters produced beforehand to form a transportable, continuous fleece takes place exclusively by pressurization. Any bark is separated or crumbled during the longitudinal cutting of the splinters or rinds and can therefore be easily removed.
- the splitters or rinds are combined in bundles before they are processed, it is advantageous if the bundle of strands is then leveled to a height that is considerably smaller than the diameter of a bundle.
- the oscillation of the cutting movements for producing the long splinters can be up to 80 Hz.
- the tamping acting on the long splinters or the braid to compress them from above exerts a sudden, sudden, high force effect, with a stored energy being converted in the range of milliseconds without large kinetic energies being developed have to.
- the fleece pressed in this way can then be subjected to thickness equalization.
- the parcel strand or the braid can be fed continuously at the same speed.
- guide elements for deflecting the longitudinally split splinters or rinds or elongated splinters are arranged within the dismantling device over their increasing conveying width in such a way that guide paths intersecting at an acute angle are formed for them.
- a metering device can be connected upstream of the parcel strand conveyor to separate the splitters or rinds from bundles supplied.
- the pressure device upstream of the disassembly device can preferably pressure rollers and / or pressure balls have, which can be actuated via interconnected hydraulic cylinders, the pressure rollers are preferably floating. This results in an optimal adaptation of the printing device to the surface contour of the package strand.
- the pressure device upstream of the disassembly device can have pressers with guide webs.
- the distance between the cutting edges of two splitting knives arranged in a row next to one another is smaller than between the rear knife edges.
- the pressure devices provided in the disassembly device can also comprise floating, freely rotating pressure rollers. So that the vertically arranged splitting knives do not pull up the respectively applied splinters or rinds during their stroke movement, it can be expedient if the splitting knives are arranged inclined against the conveying direction and thereby enclose an acute angle with the latter.
- the compression device downstream of the disassembly device can be composed of several force units, which convert the energy stored in them in a rapid cycle in the range of milliseconds. It is expedient if force units such as those used in German are used both for the oscillating drive of the splitting knife and for the drive of the compression device Patent specification 26 00 948 are described.
- FIG. 1 begins with a conveyor 1 for an endless parcel strand 2 consisting of longitudinally aligned splitters or rinds. Above the conveyor 1 there is a pressure device 3 which extends across the conveying width and acts vertically downwards and which forms the top of the parcel strand 2 acted upon and rolls on this.
- Figure 3 shows a presser 4 of this printing device 3, the pressure rollers 5 and / or pressure balls and guide webs 6 for better parallel guidance of the splinter 7 or rinds.
- a disassembly device 8 Downstream of the printing device 3 is a disassembly device 8, which has a plurality of rows of knives 10 which are aligned transversely to the conveying direction 9 and which are arranged one behind the other and offset from one another, each of which is composed of a plurality of splitting knives 11 arranged next to one another at a small spacing with the bundle strand 2 of opposing vertical cutting edges 12.
- the splitting knives 11 are guided such that they can be moved vertically and are subject to an oscillating drive 13.
- At least the splitting knives 11 of a row of knives 10 are arranged in a common gate 14 (see FIG. 5) which is acted upon by the oscillating drive 13 (not shown in more detail).
- the conveyor that transports the parcel strand 2 through the dismantling device 8 is formed by driven chains 15, which are passed between the splitting knives 11 and are arranged in an interleaved manner.
- pressing devices 16 are arranged between the individual rows of knives 10, which in turn may have pressure rollers and / or pressure balls and firmly compress the package strand 2 from above on the way through the disassembling device 8.
- the disassembly device 8 is followed by a compression device 17, in which the previously split long splinters are compressed into a fleece 18.
- the disassembly device 8 is followed by a plate belt 19 as a conveyor for the fleece 18.
- a leveling roller 20 is arranged downstream of the compacting device 17.
- FIG. 2 shows the area of the dismantling device 8, the pressing devices 16 provided between the rows of knives 10 not being shown for reasons of better clarity.
- the package strand 2 increases in height and in width.
- the dismantling device 8 is preceded by a leveling roller 21 and the compression device 17 composed of several force units 17a is connected downstream.
- Guide elements 22 for deflecting the longitudinally split splinters or rinds or longitudinal splinters are arranged within the dismantling device 8 over their increasing conveying width in such a way that guide paths 23 which intersect at an acute angle are formed for them.
- FIG. 4 shows that the distance a between the cutting edges 12 of two gap knives 11 arranged side by side in a row 10 is smaller than between the rear knife edges.
- the thickness of the knives 11 designed with a sharp cutting edge 12 is preferably 2-3 mm.
- the knife stroke can be around 200 mm.
- the splitters or rinds used as the starting material are aligned side by side and one above the other, approximately parallel to one another in the longitudinal direction and equalized to form the endless package strand 2 of approximately the same width and height.
- This parcel strand which is conveyed continuously or discontinuously on the conveyor 1, is acted upon by the printing device 3 in order to prevent evasion during the subsequent dismantling.
- the chain strand 2 is then transported by the disassembling device 8 in the conveying direction 9 from the chain conveyor 15.
- the packet strand 2 comes into the range of action of the splitting knives 11 which perform vertical oscillating cutting movements and which, with their vertical cutting edges 12, split the splinters or rinds in the longitudinal direction against their feed direction 9, longitudinal splits resulting from the repeated longitudinal splitting and being separated in parallel with the fibers.
- the guide elements 22 indicated in FIG. 2 are provided.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Finishing Walls (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Nonwoven Fabrics (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Polyesters Or Polycarbonates (AREA)
- Glass Compositions (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Herstellung eines zusammenhängenden Vlieses aus Langsplittern, die durch Zerlegung des zugeführten Ausgangsmaterials hergestellt und anschließend zu einem Vlies verdichtet werden, das nachfolgend verleimt und zusammen mit anderen Vliesen zu Blöcken o.dergl. verpreßt wird.The invention relates to a method and an apparatus for producing a coherent nonwoven from long splinters, which are produced by disassembling the supplied starting material and then compressed to form a nonwoven, which is subsequently glued and together with other nonwovens into blocks or the like. is pressed.
Ein entsprechendes Verfahren sowie Vorrichtungen zur Durchführung des Verfahrens lassen sich z.B. der DE-OS 27 16 748 entnehmen. Es handelt sich hier darum, ein verpreßtes Holzprodukt zu schaffen, das sich im Unterschied zu herkömmlichen Spanplatten aus Langsplittern zusammensetzt, die weitgehend faserparallel zueinander angeordnet sind. Als Ausgangsmaterial wird Naturholz verwendet, das von Quetschwalzen so beaufschlagt wird, daß das Holz faserparallel zu einem noch zusammenhängenden Vlies aufgelöst wird. Zur Unterstützung dieser Quetschauflösung können in das Naturholz von oben Längskerben o.dergl. eingebracht werden.A corresponding method and devices for carrying out the method can be found, for example, in DE-OS 27 16 748. The aim here is to create a compressed wood product which, in contrast to conventional chipboard, is composed of elongated chips, which are arranged largely parallel to each other. Natural wood is used as the starting material, which is impacted by squeeze rollers in such a way that the wood is broken down parallel to the fibers to form a still-connected nonwoven. To support this crushing resolution, longitudinal notches or the like can be inserted into the natural wood from above. be introduced.
Die Herstellung von derartigem Quetschholz war erstmalig beschrieben worden im Holz-Zentralblatt, Stuttgart, Nr. 11 vom 25. Januar 1967 (Aufsatz "Quetschholz - ein neuer Rohstoff für die Zellstoffindustrie"). Weitere dieses Produkt betreffende Veröffentlichungen sind die PCT-WO 85/02366, WO 85/02367, WO 85/02368, WO 85/02369 und WO 85/02370. Vergleichbar erscheint noch die US-Patentschrift 3,674,219.The production of such squeeze wood was described for the first time in Holz-Zentralblatt, Stuttgart, No. 11 of January 25, 1967 (essay "Squeeze wood - a new raw material for the pulp industry"). Other publications relating to this product are PCT-WO 85/02366, WO 85/02367, WO 85/02368, WO 85/02369 and WO 85/02370. US Pat. No. 3,674,219 still appears comparable.
Die diesem Stand der Technik gemeinsame Quetschung des Holzes zur Lockerung seines Faserverbundes und Herstellung einer Matte aus untereinander noch festverbundenen Holzfaserabschnitten erscheint in mehrfacher Hinsicht nachteilig, erfordert vor allem aber einen sehr hohen Energieaufwand.The pinch of the wood common to this prior art for loosening its fiber composite and producing a mat from wood fiber sections which are still firmly connected to one another appears to be disadvantageous in several respects, but above all requires a very high expenditure of energy.
Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Verfahren sowie eine verbesserte Vorrichtung zur Herstellung der eingangs erläuterten Vliese zu entwickeln.The invention has for its object to develop an improved method and an improved device for producing the nonwovens described above.
Diese Aufgabe wird hinsichtlich des Verfahrens durch folgende Verfahrensschritte gelöst:
- a) Als Ausgangsmaterial werden Spreißel oder Schwarten verwendet, die neben- und übereinander angenähert parallel zueinander in Längsrichtung ausgerichtet und zu einem endlosen Paketstrang angenähert gleicher Breite und Höhe egalisiert werden;
- b) dieser Paketstrang wird in Längsrichtung der Spreißel oder Schwarten angenähert horizontal vorgefördert und dabei von oben mit Druckkräften beaufschlagt, um ein Ausweichen bei der nachfolgenden Zerlegung zu verhindern;
- c) der Paketstrang wird anschließend durch eine Zerlegungsvorrichtung hindurchgeführt, in der die einzelnen Spreißel oder Schwarten in Längsrichtung durch lotrechte Schnittbewegungen in kurzer Taktfolge in einzelne, faserparallel voneinander getrennte Langsplitter gespalten werden, wobei der Paketstrang an Höhe abnimmt, an Breite jedoch zunimmt;
- d) diese Langsplitter werden anschließend durch von oben auf sie einwirkende Stampfung zu einem Vlies verdichtet.
- a) As a starting material, chisels or rinds are used, which are aligned side by side and one above the other, approximately parallel to each other in the longitudinal direction and leveled to form an endless package strand of approximately the same width and height;
- b) this bundle of parcels is conveyed approximately horizontally in the longitudinal direction of the splitters or rinds and in the process is subjected to pressure forces from above in order to prevent evasion during the subsequent dismantling;
- c) the parcel strand is then passed through a disassembling device in which the individual splitters or rinds are split in the longitudinal direction by perpendicular cutting movements in a short cycle into individual longitudinal splinters which are separated from one another in a fiber-parallel manner, the parcel strand decreasing in height but increasing in width;
- d) these long fragments are then compressed to form a fleece by tamping acting on them from above.
Als Ausgangsmaterial wird erfindungsgemäß kein Massivholz sondern Spreißel und ggf. Schwarten verwendet. Während bei herkömmlichen Verfahren eine vorherige Entrindung des Ausgangsmaterials erforderlich ist, ist dies erfindungsgemäß nicht notwendig. Der energieaufwendige Quetschvorgang wird erfindungsgemäß durch einen faserparallelen Spaltvorgang ersetzt. Entgegen den vorbekannten Verfahren wird erfindungsgemäß der Faserverbund also nicht nur gelockert zu einer Matte, in der die Faserabschnitte noch fest zusammenhängen, sondern das übereinander geschichtete Ausgangsmaterial wird aufgespalten in einzelne, also voneinander vollständig getrennte Längssplitter, deren Querschnitte vorzugsweise im Mittel 100 mm², maximal aber 200 mm² betragen sollen. Es wird zwar von "Schnittbewegungen" gesprochen; diese sollen aber in Verbindung mit dem vorzugsweise kontinuierlichen Vorschub des Paketstranges so ausgeführt werden, daß sich im Holzmaterial ein Spaltvorgang ergibt, daß also der Messerschneide im Holz ein Luftspalt vorausläuft.According to the invention, no solid wood is used as the starting material, but rather chisels and rinds if necessary. Whereas prior art debarking of the starting material is required, this is not necessary according to the invention. According to the invention, the energy-consuming squeezing process is replaced by a fiber-parallel splitting process. Contrary to the previously known methods, the fiber composite is not only loosened according to the invention to a mat in which the fiber sections are still firmly connected, but the stacked starting material is split into individual, that is to say completely separate, longitudinal splinters, the cross sections of which are preferably on average 100 mm², but maximum Should be 200 mm². One speaks of "cutting movements"; however, these should be carried out in connection with the preferably continuous feed of the parcel strand in such a way that a splitting process results in the wood material, that is to say an air gap precedes the knife edge in the wood.
Die Spreißel oder Schwarten können vor ihrer Verarbeitung schon im Sägewerk in einzelne Bunde zusammengefaßt und aus diesen Bunden heraus zur Bildung des endlosen Paketstranges vereinzelt werden. Dabei ist es zweckmäßig, wenn der Paketstrang auf eine Höhe egalisiert wird, die erheblich kleiner ist als der Durchmesser eines Bundes.Before they are processed, the splinters or rinds can be combined into individual bundles in the sawmill and separated from these bundles to form the endless bundle of packages. It is useful if the package strand is at a height is equalized, which is considerably smaller than the diameter of a collar.
Die Spreißel bzw. Schwarten werden auf ihrem Weg zwischen den einzelnen Schnittvorgängen von oben mit ihren vor fördernden Druckkräften beaufschlagt, um das übereinander geschichtete Ausgangsmaterial während seiner Längszerlegung fest zusammenzupressen.
Durch die Längsaufteilung der Spreißel oder Schwarten infolge der wiederholten Längssspaltung werden innere Spannungen des Holzes frei und führen zu einer gewebeartigen Matte gebildet aus lose neben bzw. übereinander liegenden Langsplittern. Dieses mattenartige Gebilde wird dann durch die erfindungsgemäß vorgesehene Stampfung zu einem Vlies verdichtet. Dabei läßt sich der Druck der Stampfer so einstellen, daß der Faserverbund vorwählbar gelockert wird, was sich mit Quetschwalzen nicht erreichen läßt.On their way between the individual cutting processes, the splinters or rinds are acted upon from above with their compressive forces in order to compress the starting material, which is stacked on top of one another, during its longitudinal decomposition.
Due to the longitudinal division of the splitters or rinds as a result of the repeated longitudinal splitting, internal tensions in the wood are released and lead to a fabric-like mat formed from loose longitudinal fragments lying next to or on top of one another. This mat-like structure is then compressed into a fleece by the tamping provided according to the invention. The pressure of the tamper can be adjusted so that the fiber composite can be loosened in a preselectable manner, which cannot be achieved with squeeze rollers.
Um das gegenseitige Verfilzen der Langsplitter bei der Bildung des Gewebes noch zu verstärken, kann es vorteilhaft sein, wenn die Langsplitter auf sich spitzwinklig kreuzenden Bahnen geführt werden. Hierdurch wird der Spreizeffekt noch unterstützt, der sich bereits durch die Längsspaltung ergibt, bei der die aus einem Spreißel gebildeten Langsplitter von dem sie längs aufteilenden Spaltmesser beidseitig aus der ursprünglichen Förderrichtung etwas abgelenkt werden, so daß sich nachfolgend ein unterschiedlicher Richtungsverlauf ergibt.In order to intensify the mutual felting of the long splinters during the formation of the fabric, it can be advantageous if the long splinters are guided on paths crossing at an acute angle. This further supports the spreading effect which already results from the longitudinal splitting, in which the longitudinal splinters formed from a splitter are slightly deflected from the original conveying direction on both sides by the splitting knife, which divides them lengthwise, so that subsequently there is a different direction course.
Grundsätzlich wäre es möglich, in kurzer Taktfolge Längsspaltungen durchzuführen mit Spaltmessern, deren Schneiden horizontal und faserparallel ausgerichtet sind. Als vorteilhafter, insbesondere aber energiesparender haben sich jedoch Längsspalte erwiesen, die mit lotrecht oszillierenden Schnittbewegungen von Spaltmessern ausgeführt werden, deren Schneiden zumindest angenähert lotrecht stehen, so daß die Spaltung entgegen der Holzvorschubrichtung ausgeführt werden.In principle, it would be possible to perform longitudinal splitting in a short cycle with splitting knives, the cutting edges of which are aligned horizontally and parallel to the fibers. However, longitudinal gaps, which are carried out with perpendicularly oscillating cutting movements of splitting knives, the cutting edges of which are at least approximately perpendicular, have proven to be advantageous, but in particular energy-saving, so that the splitting is carried out against the direction of the wood advance.
Ein besonderer Vorteil des erfindungsgemäßen Verfahrens besteht darin, daß kein Rundholz, sondern Spreißel und ggf. Schwarten verarbeitet werden, die normalerweise in mehreren Lagen übereinander geschichtet sein können. Dabei läßt sich Vormaterial beliebiger Länge einsetzen, während im Stand der Technik abgelängtes Rundholz erforderlich ist. Vorteilhaft ist ferner, daß bei dem erfindungsgemäßen Verfahren mit kontrollierbaren Vorschub- und Schnittkräften gearbeitet werden kann. Die Verbindung der einzelnen, zuvor erzeugten Langsplitter zu einem transportfähigen, zusammenhängenden Vlies erfolgt erfindungsgemäß ausschließlich durch Druckbeaufschlagung. Etwaige Rinde wird bei der Längszerlegung der Spreißel bzw. Schwarten abgetrennt bzw. zerbröselt und läßt sich dadurch problemlos abführen.A particular advantage of the method according to the invention is that it does not process logs, but chisels and possibly rinds, which can normally be stacked on top of each other in several layers. In this case, raw material of any length can be used, while cut logs are required in the prior art. It is also advantageous that the process according to the invention can be used with controllable feed and cutting forces. According to the invention, the connection of the individual longitudinal splinters produced beforehand to form a transportable, continuous fleece takes place exclusively by pressurization. Any bark is separated or crumbled during the longitudinal cutting of the splinters or rinds and can therefore be easily removed.
Werden die Spreißel oder Schwarten vor ihrer Verarbeitung in Bunde zusammengefaßt, dann ist es vorteilhaft, wenn der Paketstrang anschließend auf eine Höhe egalisiert wird, die erheblich kleiner ist als der Durchmesser eines Bundes.If the splitters or rinds are combined in bundles before they are processed, it is advantageous if the bundle of strands is then leveled to a height that is considerably smaller than the diameter of a bundle.
Die Oszillation der Schnittbewegungen zur Erzeugung der Langsplitter kann erfindungsgemäß bis zu 80 Hz betragen. Zur nachfolgenden Bildung des Vlieses ist es vorteilhaft, wenn die die Langsplitter bzw. das Geflecht zu deren Verdichtung von oben beaufschlagende Stampfung eine plötzliche, schlagartige hohe Krafteinwirkung ausübt, wobei eine gespeicherte Energie im Bereich von Millisekunden umgesetzt wird, ohne daß große kinetische Energien entwickelt werden müssen. Das so verpreßte Vlies kann anschließend einer Dickenegalisierung unterworfen werden. Der Paketstrang bzw. das Geflecht können kontinuierlich mit gleicher Geschwindigkeit vorgeschoben werden. Dadurch erreicht man u.a. vor der diskontinuierlich arbeitenden Stampfung einen Materialstau verbunden mit einer Stauchung der Langsplitter, die unter dieser Krafteinwirkung nadelöhrartig aufplatzen. Hierdurch wird die Verfilzung verbessert, wobei der genannte Effekt steuerbar ist.According to the invention, the oscillation of the cutting movements for producing the long splinters can be up to 80 Hz. For the subsequent formation of the nonwoven, it is advantageous if the tamping acting on the long splinters or the braid to compress them from above exerts a sudden, sudden, high force effect, with a stored energy being converted in the range of milliseconds without large kinetic energies being developed have to. The fleece pressed in this way can then be subjected to thickness equalization. The parcel strand or the braid can be fed continuously at the same speed. As a result, a material jam combined with a compression of the longitudinal splinters, which burst open like a needle under this force, is achieved, inter alia, before the discontinuous stamping. This improves the matting, the effect mentioned being controllable.
Die der Erfindung zugrundeliegende Aufgabe wird hinsichtlich der Vorrichtung durch folgende Merkmale gelöst:
- a) Ein Förderer für einen endlosen, aus längs ausgerichteten Spreißeln oder Schwarten bestehenden Paketstrang;
- b) eine oberhalb diese Förderers angeordnete, sich über die Förderbreite erstreckende und lotrecht nach unten wirkende, auf dem Paketstrang abrollende Druckvorrichtung;
- c) eine dem Förderer nachgeschaltete Zerlegungsvorrichtung, bestehend aus mehreren, quer zur Förderrichtung ausgerichteten, hintereinander und zueinander versetzt angeordneten Messerreihen, die sich jeweils aus mehreren, in lichtem Abstand nebeneinander angeordneten Spaltmessern zusammensetzen, die lotrecht verschiebbar geführt sind und einem Antrieb mit kurzer Taktfolge unterliegen;
- d) der Zerlegungsvorrichtung ist eine Verdichtungseinrichtung nachgeschaltet, in der die zuvor gespaltenen Langsplitter zu einem Vlies verdichtet werden.
- a) A conveyor for an endless package strand consisting of longitudinally oriented splitters or rinds;
- b) a printing device which is arranged above this conveyor, extends across the conveyor width and acts vertically downwards, and rolls on the package strand;
- c) a dismantling device connected downstream of the conveyor, consisting of a plurality of rows of knives aligned transversely to the conveying direction, one behind the other and offset from one another, each of which is composed of a plurality of splitting knives which are arranged next to one another at a short distance from one another and are guided vertically displaceably and are subject to a drive with a short cycle ;
- d) the dismantling device is followed by a compacting device in which the previously split long fragments are compacted to form a fleece.
Dabei kann es zusätzlich zweckmäßig sein, wenn innerhalb der Zerlegungsvorrichtung über deren zunehmende Förderbreite Leitelemente zur Ablenkung der längsgespaltenen Spreißel oder Schwarten bzw. Langsplitter so angeordnet sind, daß für diese sich spitzwinklig kreuzende Führungswege gebildet sind.It may also be advantageous if guide elements for deflecting the longitudinally split splinters or rinds or elongated splinters are arranged within the dismantling device over their increasing conveying width in such a way that guide paths intersecting at an acute angle are formed for them.
Dem Paketstrang-Förderer kann eine Dosiervorrichtung vorgeschaltet sein zur Vereinzelung der Spreißel oder Schwarten aus zugeführten Bunden. Die der Zerlegungsvorrichtung vorgeschaltete Druckvorrichtung kann vorzugsweise Druckrollen und/oder Druckkugeln aufweisen, die über untereinander verbundene Hydraulikzylinder betätigbar sein können, wobei die Druckrollen vorzugsweise schwimmend gelagert sind. Hierdurch erhält man eine optimale Anpassung der Druckeinrichtung an die Oberflächenkontur des Paketstranges.A metering device can be connected upstream of the parcel strand conveyor to separate the splitters or rinds from bundles supplied. The pressure device upstream of the disassembly device can preferably pressure rollers and / or pressure balls have, which can be actuated via interconnected hydraulic cylinders, the pressure rollers are preferably floating. This results in an optimal adaptation of the printing device to the surface contour of the package strand.
Um die Parallelführung der Spreißel bzw. Schwarten zu verbessern bzw. sicherzustellen, kann die der Zerlegungsvorrrichtung vorgeschaltete Druckvorrichtung Andrücker mit Führungsstegen aufweisen.In order to improve or ensure the parallel guidance of the splinters or rinds, the pressure device upstream of the disassembly device can have pressers with guide webs.
Um ein Verkeilen der Spreißel oder Schwarten zwischen den Spaltmessern zu vermeiden, ist es vorteilhaft, wenn der Abstand zwischen den Schneiden von zwei in einer Reihe nebeneinander angeordneten Spaltmessern kleiner ist als zwischen den rückwärtigen Messerkanten.In order to avoid wedging of the splinters or rinds between the splitting knives, it is advantageous if the distance between the cutting edges of two splitting knives arranged in a row next to one another is smaller than between the rear knife edges.
Auch die in der Zerlegungsvorrichtung vorgesehenen Andruckvorrichtungen können schwimmend gelagerte, frei drehende Druckrollen umfassen. Damit die lotrecht angeordneten Spaltmesser bei ihrer Hubbewegung die jeweils beaufschlagten Spreißel oder Schwarten nicht mit hochziehen, kann es zweckmäßig sein, wenn die Spaltmesser entgegen der Förderrichtung geneigt angeordnet sind und dadurch mit dieser einen spitzen Winkel einschließen.The pressure devices provided in the disassembly device can also comprise floating, freely rotating pressure rollers. So that the vertically arranged splitting knives do not pull up the respectively applied splinters or rinds during their stroke movement, it can be expedient if the splitting knives are arranged inclined against the conveying direction and thereby enclose an acute angle with the latter.
Die der Zerlegungsvorrichtung nachgeschaltete Verdichtungseinrichtung kann sich aus mehreren Krafteinheiten zusammensetzen, die in rascher Taktfolge die in ihnen gespeicherte Energie im Bereich von Millisekunden umsetzen. Dabei ist es zweckmäßig, wenn sowohl für den oszillierenden Antrieb der Spaltmesser als auch für den Antrieb der Verdichtungseinrichtung Krafteinheiten Verwendung finden, wie sie in der deutschen Patentschrift 26 00 948 beschrieben sind.The compression device downstream of the disassembly device can be composed of several force units, which convert the energy stored in them in a rapid cycle in the range of milliseconds. It is expedient if force units such as those used in German are used both for the oscillating drive of the splitting knife and for the drive of the compression device Patent specification 26 00 948 are described.
Weitere Merkmale der Erfindung sind Gegenstand der Unteransprüche und werden mit weiteren Vorteilen der Erfindung anhand von Ausführungsbeispielen näher erläutert.Further features of the invention are the subject of the dependent claims and are explained in more detail with further advantages of the invention on the basis of exemplary embodiments.
In der Zeichnung sind einige als Beispiele dienende Ausführungsformen der Erfindung schematisch dargestellt. Es zeigen:
Figur 1 in Seitenansicht eine Anlage zur Herstellung eines Vlieses aus Langsplittern;Figur 2 in vergrößertem Maßstab einen Anlagenabschnitt gemäß Figur 1 in Draufsicht und zum Teil im Horizontalschnitt;Figur 3 in gegenüber der Figur 1 vergrößertem Maßstab eine Druckvorrichtung in Stirnansicht und zum Teil im Querschnitt;Figur 4 einDetail der Figur 2 in vergrößertem Maßstab und in abgewandelter Ausführungsform und- Figur 5 in
gegenüber Figur 1 vergrößertem Maßstab einDetail der Figur 1 in abgewandelter Ausführungsform.
- Figure 1 is a side view of a plant for producing a nonwoven from long splinters;
- Figure 2 on an enlarged scale a plant section according to Figure 1 in plan view and partly in horizontal section;
- Figure 3 on an enlarged scale compared to Figure 1, a printing device in front view and partly in cross section;
- Figure 4 shows a detail of Figure 2 on an enlarged scale and in a modified embodiment and
- Figure 5 on a larger scale than Figure 1 shows a detail of Figure 1 in a modified embodiment.
Die in Figur 1 dargestellte Anlage beginnt mit einem Förderer 1 für einen endlosen, aus längs ausgerichteten Spreißeln oder Schwarten bestehenden Paketstrang 2. Oberhalb der Förderers 1 ist eine sich über die Förderbreite erstreckende und lotrecht nach unten wirkende Druckvorrichtung 3 angeordnet, die die Oberseite des Paketstranges 2 beaufschlagt und auf dieser abrollt. Figur 3 zeigt einen Andrücker 4 dieser Druckvorrichtung 3, der Druckrollen 5 und/oder Druckkugeln sowie Führungsstege 6 zur besseren Parallelführung der Spreißel 7 bzw. Schwarten aufweist.The system shown in FIG. 1 begins with a
Der Druckvorrichtung 3 ist eine Zerlegungsvorrichtung 8 nachgeschaltet, die mehrere, quer zur Förderrichtung 9 ausgerichtete, hintereinander und zueinander versetzt angeordnete Messerreihen 10 aufweist, die sich jeweils aus mehreren, in lichtem Abstand nebeneinander angeordneten Spaltmessern 11 mit dem Paketstrang 2 entgegengerichteten lotrechten Schneiden 12 zusammensetzen. Die Spaltmesser 11 sind lotrecht verschiebbar geführt und unterliegen einem oszillierenden Antrieb 13. Dabei sind zumindest die Spaltmesser 11 einer Messerreihe 10 in einem gemeinsamen Gatter 14 angeordnet (siehe Figur 5), das von dem nicht näher dargestellten oszillierenden Antrieb 13 beaufschlagt ist. Der den Paketstrang 2 durch die Zerlegungsvorrichtung 8 transportierende Förderer ist durch angetriebene, zwischen den Spaltmessern 11 durchgeführte Ketten 15 gebildet, die verschachtelt angeordnet sind. In der Zerlegungsvorrichtung 8 sind zwischen den einzelnen Messerreihen 10 Andrückvorrichtungen 16 angeordnet, die wiederum Druckrollen und/oder Druckkugeln aufweisen können und den Paketstrang 2 auf dem Weg durch die Zerlegungsvorrichtung 8 von oben fest zusammendrücken.Downstream of the
Der Zerlegungsvorrichtung 8 ist eine Verdichtungseinrichtung 17 nachgeschaltet, in der die zuvor gespaltenen Langsplitter zu einem Vlies 18 verdichtet werden. Der Zerlegungsvorrichtung 8 ist als Förderer für das Vlies 18 ein Plattenband 19 nachgeschaltet. Der Verdichtungseinrichtung 17 ist eine Egalisierwalze 20 nachgeordnet.The
Figur 2 zeigt den Bereich der Zerlegungsvorrichtung 8, wobei die zwischen den Messerreihen 10 vorgesehenen Andrückvorrichtungen 16 aus Gründen der besseren Übersichtlichkeit nicht dargestellt sind. Im Bereich dieser Zerlegungsvorrichtung 8 (sowie nachfolgend im Bereich der Verdichtungseinrichtung 17 und der Egalisierwalze 20) nimmt der Paketstrang 2 an Höhe ab an Breite jedoch zu. Der Zerlegungsvorrichtung 8 ist eine Egalisierwalze 21 vorgeschaltet und die aus mehreren Krafteinheiten 17a zusammengesetzte Verdichtungseinrichtung 17 nachgeschaltet. Innerhalb der Zerlegungsvorrichtung 8 sind über deren zunehmende Förderbreite Leitelemente 22 zur Ablenkung der längs gespaltenen Spreißel oder Schwarten bzw. Langsplitter so angeordnet, daß für diese sich spitzwinklig kreuzende Führungswege 23 gebildet sind.FIG. 2 shows the area of the
Figur 4 läßt erkennen, daß der Abstand a zwischen den Schneiden 12 von zwei in einer Reihe 10 nebeneinander angeordneten Spaltmessern 11 kleiner ist als zwischen den rückwärtigen Messerkanten. Die Stärke der mit scharfer Schneide 12 ausgebildeten Messer 11 beträgt vorzugsweise 2 - 3 mm. Der Messerhub kann bei etwa 200 mm liegen.FIG. 4 shows that the distance a between the cutting edges 12 of two
Die als Ausgangsmaterial verwendeten Spreißel oder Schwarten werden neben- und übereinander angenähert parallel zueinander in Längsrichtung ausgerichtet und zu dem endlosen Paketstrang 2 angenähert gleicher Breite und Höhe egalisiert. Dieser auf dem Förderer 1 kontinuierlich oder diskontinuierlich vorgeförderte Paketstrang wird von der Druckvorrichtung 3 beaufschlagt, um ein Ausweichen bei der nachfolgenden Zerlegung zu verhindern. Von dem Kettenförderer 15 wird der Paketstrang 2 dann durch die Zerlegungsvorrichtung 8 in Förderrichtung 9 transportiert. Dabei gelangt der Paketstrang 2 stirnseitig in den Wirkungsbereich der lotrechte oszillierende Schnittbewegungen ausführenden Spaltmessern 11, die mit ihren lotrechten Schneiden 12 die Spreißel oder Schwarten entgegen ihrer Vorschubrichtung 9 in Längsrichtung aufspalten, wobei sich aufgrund der wiederholten Längsspaltungen faserparallel voneinander getrennte Langsplitter ergeben. Um deren Verfilzung noch zu verstärken, sind die in Figur 2 angedeuteten Leitelemente 22 vorgesehen. Durch die Anordnung der genannten Führungswege 23 wird sichergestellt, daß sich die Langsplitter auf ihrem Weg durch die Zelegungsvorrichtung 8 kreuzen und so ein Gewebe bilden, das dann durch die nachgeschaltete Verdichtungseinrichtung 17, die auf das Gewebe von oben eine Stampfung ausübt, zu dem Vlies 18 verdichtet wird, in dem die Langsplitter überwiegend in ihrer Längsrichtung angeordnet sind.The splitters or rinds used as the starting material are aligned side by side and one above the other, approximately parallel to one another in the longitudinal direction and equalized to form the
Claims (30)
- Process for producing a coherent web from long slivers which are produced by breaking up the raw material fed and are then compacted to give a web which is subsequently glued and then pressed together with other webs to give blocks or the like, characterised by the following process steps:a) the raw material used is sticks or slabs which are aligned approximately parallel to each other in the longitudinal direction side by side and in superposition and are dressed to give a continuous packet strand of approximately equal width and height;b) this packet strand is advanced approximately horizontally in the longitudinal direction of the sticks or slabs and at the same time subjected to pressure forces from above, in order to prevent yielding during the subsequent breaking-up;c) the packet strand is then passed through a breaking-up device in which the individual sticks or slabs are split in the longitudinal direction by vertical cutting motions in a short time cycle to give individual long slivers which are mutually separate parallel to the fibres, the packet strand decreasing in height but increasing in width;d) these long slivers are then compacted into a web by ramming which acts on them from above.
- Process according to claim 1, characterised in that the long slivers are moved on paths crossing at acute angles to form a mesh.
- Process according to claim 1 or 2, characterised in that long slivers are produced having a cross-section of on average 100 mm², at most 200 mm².
- Process according to claim 1, 2 or 3, characterised in that the individual sticks or slabs are split into long slivers against their direction of advance by vertically oscillating cutting motions.
- Process according to one of the preceding claims, characterised in that, before they are processed, the sticks or slabs are combined into individual bundles and detached from these bundles to form the continuous packet strand.
- Process according to claim 5, characterised in that the packet strand is dressed to a height which is considerably smaller than the diameter of a bundle.
- Process according to one of the preceding claims, characterised in that the packet strand or its sticks or slabs are subjected successively to a plurality of vertically oscillating cutting motions.
- Process according to one of the preceding claims, characterised in that the oscillation of the cutting motions amounts to up to 80 Hz.
- Process according to claim 7 or 8, characterised in that the sticks or slabs are subjected from above to pressure forces promoting the advance of said sticks or slabs when said sticks or slabs are being passed between the individual cutting operations.
- Process according to one of the preceding claims, characterised in that the ramming, to which the long slivers or the mesh respectively are/is subjected from above for the purpose of compacting them/it, exerts a sudden, abrupt action of a large force, with stored energy being converted within milliseconds, without large kinetic energies having to be evolved.
- Process according to one of the preceding claims, characterised in that the compressed web is subjected to thickness dressing.
- Process according to one of the preceding claims, characterised by the use of un-barked raw material of any length.
- Process according to claim 9, characterised in that when the sticks or slabs are broken up or the mesh is formed, the bark is separated off and removed.
- Process according to one of the preceding claims, characterised in that the packet strand, which is preferably advanced continuously at constant speed, is supported while being transported through the breaking-up step.
- Device for producing a coherent web from long slivers which are produced by breaking-up the raw material fed and are then compacted to give a web which is subsequently glued and then pressed together with other webs to give blocks or the like, in particular for carrying out the method according to one of the preceding claims, characterised by the following features:a) a conveyor (1) for transporting a continuous packet strand (2) which consists of longitudinally aligned sticks or slabs;b) a pressing device (3) arranged above said conveyor (1) extending across the conveyor width, acting vertically downwardly and rolling on the packet strand (2);c) a breaking-up device (8) arranged downstream of the conveyor (1) including a plurality of rows of knives (10) aligned transversely to the direction of conveyance (9) and arranged with an offset behind one another and relative to one another, each of said rows of knives (10) being composed of a plurality of splitting knives (11) arranged side by side with a clearance, being guided to be vertically displaceable and being governed by a drive (13) with a short time cycle;d) a compacting device (17) provided downstream of the breaking-up device (8), in which the previously split long slivers are compacted to produce a web (18).
- Device according to claim 15, characterised in that located within the breaking-up device and extending across an increasing conveying width thereof, there are guide elements (22) for deflecting the longitudinally split sticks or slabs, or long slivers respectively, the guide elements (22) being arranged in such a way that guide paths (23) crossing at acute angles are formed for said split sticks or slabs, or long slivers respectively.
- Device according to claim 15 or 16, characterised in that a metering device for detaching the sticks (7) or slabs from bundles fed is arranged upstream of the packet strand conveyor (1).
- Device according to claim 15, 16 or 17, characterised by a dressing device associated with the packet strand conveyor (1) to form a packet strand (2) of approximately equal width and height.
- Device according to one of the claims 15 to 18, characterised in that the pressing device (3) arranged upstream of the breaking-up device (8) has pressing rolls (5) and/or pressing balls which can be actuated by interconnected hydraulic cylinders.
- Device according to claim 19, characterised in that the pressing rolls (5) include floating mounts.
- Device according to claim 15 or 16, characterised in that the pressing device (3) arranged upstream of the breaking-up device (8) includes contact pressure blocks (4) with guide strips (6) for improving the parallel guidance of the sticks (7) or slabs.
- Device according to one of the claims 15 to 21, characterised in that the splitting knives (11) are arranged at least approximately vertically with approximately vertical cutting edges (12) directed against the pocket strand (2).
- Device according to claim 22, characterised in that the distance (a) between the cutting edges (12) of two splitting knives (11) arranged side by side in one row (10) is smaller than the distance between the rear knife edges.
- Device according to one of the claims 15 to 23, characterised in that at least the splitting knives (11) of one row (10) are arranged in a common frame (14) which is subject to an oscillating drive (13).
- Device according to one of the claims 15 to 24, characterised in that the conveyor passing through the breaking-up device (8) comprises driven chains (15) guided through between the splitting knives (11).
- Device according to one of the claims 15 to 25, characterised in that a plate belt (19) for the web (18) is provided downstream of the breaking-up device (8).
- Device according to one of the claims 15 to 26, characterised in that arranged in the breaking-up device (8) between the individual rows of knives (10) there are contact pressure devices (16) which firmly compress the packet strand (2) or the mesh being formed from above on the way through the breaking-up device (8).
- Device according to claim 27, characterised in that the contact pressure devices (16) comprise freely rotating pressure rolls in floating mounts.
- Device according to one of the claims 15 to 28, characterised in that the splitting knives (11) are arranged with an inclination against the direction of conveyance (9) and thereby form an acute angle with the latter.
- Device according to one of the claims 15 to 29, characterised in that the compacting device (17) downstream of the breaking-up device (8) is composed of a plurality of power units (17a) which convert the energy stored in them within milliseconds in a rapid time cycle.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE3917452A DE3917452C1 (en) | 1989-05-30 | 1989-05-30 | |
DE3917452 | 1989-05-30 |
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EP90108621A Expired - Lifetime EP0400359B1 (en) | 1989-05-30 | 1990-05-08 | Method and device for the production of a coherent fleece of long fibres subsequently pressed into blocks or similar articles |
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US (1) | US5074945A (en) |
EP (1) | EP0400359B1 (en) |
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US6868877B2 (en) * | 2001-11-13 | 2005-03-22 | Louisiana-Pacific Corporation | Method for producing a processed continuous veneer ribbon and consolidated processed veneer strand product therefrom |
US7691223B2 (en) * | 2007-01-25 | 2010-04-06 | Ford Global Technologies, Llc | Apparatus and method for making fiber reinforced sheet molding compound |
CN108839146B (en) * | 2018-08-21 | 2023-04-07 | 南京林业大学 | Production mold and manufacturing method for recombined bamboo component with accurate positioning and reinforcing ribs |
DE102022123936A1 (en) | 2022-09-19 | 2024-03-21 | Peter Vente GmbH & Co. KG | Device for processing elongated wooden elements |
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US4704316A (en) * | 1983-11-23 | 1987-11-03 | Repco Limited | Manufacture of reconsolidated wood products |
WO1985002367A1 (en) * | 1983-11-23 | 1985-06-06 | Commonwealth Scientific And Industrial Research Or | Producing reconsolidated wood products |
AU563122B2 (en) * | 1983-11-23 | 1987-06-25 | Valjul Pty Ltd | Improvements in manufacture of reconsolidated wood products |
WO1985002366A1 (en) * | 1983-11-23 | 1985-06-06 | Commonwealth Scientific And Industrial Research Or | Improved process for reconsolidated wood production |
AU563123B2 (en) * | 1983-11-23 | 1987-06-25 | Valjul Pty Ltd | Improvements in manufacture of reconsolidated wood products |
NZ210306A (en) * | 1983-11-23 | 1987-04-30 | Repco Ltd | Continuously forming reconstituted wood product from separated fibres |
JPS63107505A (en) * | 1986-06-11 | 1988-05-12 | Koyo Sangyo Kk | Laminated material and its manufacture |
WO1988000517A1 (en) * | 1986-07-10 | 1988-01-28 | Wurster U. Dietz Gmbh U. Co. Maschinenfabrik | Process and device for cutting up tree trunks into wood products without shavings |
AU623399B2 (en) * | 1988-05-18 | 1992-05-14 | Commonwealth Scientific And Industrial Research Organisation | Improved method and apparatus for use in producing reconsolidated wood products |
-
1989
- 1989-05-30 DE DE3917452A patent/DE3917452C1/de not_active Expired - Fee Related
-
1990
- 1990-05-08 EP EP90108621A patent/EP0400359B1/en not_active Expired - Lifetime
- 1990-05-08 DE DE59006948T patent/DE59006948D1/en not_active Expired - Fee Related
- 1990-05-08 AT AT90108621T patent/ATE110615T1/en not_active IP Right Cessation
- 1990-05-28 DD DD90341045A patent/DD294659A5/en not_active IP Right Cessation
- 1990-05-29 NO NO902383A patent/NO173436C/en unknown
- 1990-05-29 CA CA002017727A patent/CA2017727A1/en not_active Abandoned
- 1990-05-30 AU AU56076/90A patent/AU627581B2/en not_active Ceased
- 1990-05-30 JP JP2141207A patent/JPH03121806A/en active Pending
- 1990-05-30 FI FI902694A patent/FI902694A0/en not_active Application Discontinuation
- 1990-05-30 PT PT94207A patent/PT94207A/en not_active Application Discontinuation
- 1990-05-30 US US07/530,576 patent/US5074945A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FI902694A0 (en) | 1990-05-30 |
AU5607690A (en) | 1990-12-06 |
NO902383L (en) | 1990-12-03 |
DD294659A5 (en) | 1991-10-10 |
EP0400359A3 (en) | 1992-03-18 |
NO173436C (en) | 1993-12-15 |
NO902383D0 (en) | 1990-05-29 |
JPH03121806A (en) | 1991-05-23 |
US5074945A (en) | 1991-12-24 |
DE59006948D1 (en) | 1994-10-06 |
EP0400359A2 (en) | 1990-12-05 |
ATE110615T1 (en) | 1994-09-15 |
CA2017727A1 (en) | 1990-11-30 |
AU627581B2 (en) | 1992-08-27 |
NO173436B (en) | 1993-09-06 |
PT94207A (en) | 1991-02-08 |
DE3917452C1 (en) | 1990-10-25 |
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