EP0400359A2 - Procédé et dispositif pour fabriquer une nappe cohérente de fibres longues, par la suite pressée pour former un bloc ou un objet similaire - Google Patents

Procédé et dispositif pour fabriquer une nappe cohérente de fibres longues, par la suite pressée pour former un bloc ou un objet similaire Download PDF

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Publication number
EP0400359A2
EP0400359A2 EP90108621A EP90108621A EP0400359A2 EP 0400359 A2 EP0400359 A2 EP 0400359A2 EP 90108621 A EP90108621 A EP 90108621A EP 90108621 A EP90108621 A EP 90108621A EP 0400359 A2 EP0400359 A2 EP 0400359A2
Authority
EP
European Patent Office
Prior art keywords
splinters
rinds
strand
longitudinal
conveyor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90108621A
Other languages
German (de)
English (en)
Other versions
EP0400359B1 (fr
EP0400359A3 (fr
Inventor
Gerd Schäfer
Karl Schäfer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inter Wood Maschinen GmbH and Co KG
Original Assignee
Inter Wood Maschinen GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inter Wood Maschinen GmbH and Co KG filed Critical Inter Wood Maschinen GmbH and Co KG
Publication of EP0400359A2 publication Critical patent/EP0400359A2/fr
Publication of EP0400359A3 publication Critical patent/EP0400359A3/fr
Application granted granted Critical
Publication of EP0400359B1 publication Critical patent/EP0400359B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00Pretreatment of moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/08Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood fibres, e.g. produced by tearing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27MWORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1052Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062Prior to assembly
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1052Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062Prior to assembly
    • Y10T156/1067Continuous longitudinal slitting
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1052Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062Prior to assembly
    • Y10T156/1075Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/13Severing followed by associating with part from same source
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1317Means feeding plural workpieces to be joined
    • Y10T156/1322Severing before bonding or assembling of parts
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/02Other than completely through work thickness
    • Y10T83/0267Splitting
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/02Other than completely through work thickness
    • Y10T83/0267Splitting
    • Y10T83/0274By use of endless band or chain knife
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/02Other than completely through work thickness
    • Y10T83/0267Splitting
    • Y10T83/0296With 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 acted upon 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 made in the natural wood from above. be introduced.
  • the object of the invention is to develop an improved method and an improved device for producing the nonwovens explained at the outset.
  • the fiber composite is not only loosened according to the invention to form 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. It is spoken of "cutting movements"; however, these should be carried out in connection with the preferably continuous feed of the package 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 already be combined in individual bundles and separated from these bundles to form the endless package strand. It is useful if the package strand to one level 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 stacked starting material firmly during its longitudinal decomposition. Due to the longitudinal division of the splinters 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 longitudinal splinters lying loosely 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 which intersect at an acute angle.
  • the spreading effect is further supported, 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.
  • raw material of any length can be used, while in the prior art cut logs are required.
  • the connection of the individual, previously produced long splinters to form a transportable, coherent fleece takes place according to the invention exclusively by applying pressure. Any bark is separated or crumbled during the longitudinal cutting of the splinters or rinds and can thus be easily removed.
  • the splitters or rinds are combined in bundles before they are processed, then it is advantageous if the package strand is then leveled to a height which is considerably smaller than the diameter of a bundle.
  • the oscillation of the cutting movements for generating the long splinters can be up to 80 Hz.
  • the tamping which acts on the long splinters or the braid to compress them from above exerts a sudden, sudden, high force action, 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 have balls that 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 package strand 2 consisting of longitudinally aligned splitters or rinds. Above the conveyor 1 there is arranged a pressure device 3 which extends across the conveyor width and acts vertically downwards and which forms the top of the package 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 splay 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 a short distance apart with the bundle strand 2 opposing vertical blades 12.
  • the splitting knives 11 are guided so as to be vertically displaceable 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 any more detail.
  • the conveyor which transports the parcel strand 2 through the dismantling device 8 is formed by driven chains 15, which are carried out 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 can have pressure rollers and / or pressure balls and firmly compress the parcel strand 2 from above on the way through the disassembling device 8.
  • the dismantling device 8 is followed by a compression device 17, in which the previously split long fragments 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 but in width.
  • the dismantling device 8 is preceded by a leveling roller 21 and the compression device 17 composed of a plurality of 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 counter to their feed direction 9, longitudinal splits resulting from the repeated longitudinal splitting, which are separated from one another in a fiber-parallel manner.
  • the guide elements 22 indicated in FIG. 2 are provided.
  • the genann th guideways 23 ensures that the long fragments cross on their way through the separating device 8 and thus form a fabric, which is then compressed by the downstream compression device 17, which exerts a pounding on the fabric from above, to form the fleece 18 which the long splinters are mainly arranged in their longitudinal direction.

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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)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Nonwoven Fabrics (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Glass Compositions (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Polyesters Or Polycarbonates (AREA)
EP90108621A 1989-05-30 1990-05-08 Procédé et dispositif pour fabriquer une nappe cohérente de fibres longues, par la suite pressée pour former un bloc ou un objet similaire Expired - Lifetime EP0400359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3917452 1989-05-30
DE3917452A DE3917452C1 (fr) 1989-05-30 1989-05-30

Publications (3)

Publication Number Publication Date
EP0400359A2 true EP0400359A2 (fr) 1990-12-05
EP0400359A3 EP0400359A3 (fr) 1992-03-18
EP0400359B1 EP0400359B1 (fr) 1994-08-31

Family

ID=6381609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90108621A Expired - Lifetime EP0400359B1 (fr) 1989-05-30 1990-05-08 Procédé et dispositif pour fabriquer une nappe cohérente de fibres longues, par la suite pressée pour former un bloc ou un objet similaire

Country Status (11)

Country Link
US (1) US5074945A (fr)
EP (1) EP0400359B1 (fr)
JP (1) JPH03121806A (fr)
AT (1) ATE110615T1 (fr)
AU (1) AU627581B2 (fr)
CA (1) CA2017727A1 (fr)
DD (1) DD294659A5 (fr)
DE (2) DE3917452C1 (fr)
FI (1) FI902694A7 (fr)
NO (1) NO173436C (fr)
PT (1) PT94207A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010145A1 (fr) * 1997-08-21 1999-03-04 Babcock-Bsh Gmbh Procede et installation de fabrication de panneaux en materiau derive du bois

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2411720C (fr) * 2001-11-13 2007-02-06 Louisiana-Pacific Corporation Methode de production d'un ruban de placage continu usine et produits fabriques a partir de ruban de placage usine combine
US7691223B2 (en) * 2007-01-25 2010-04-06 Ford Global Technologies, Llc Apparatus and method for making fiber reinforced sheet molding compound
CN108839146B (zh) * 2018-08-21 2023-04-07 南京林业大学 一种精准定位增强筋重组竹构件生产模具及制作方法
DE102022123936B4 (de) * 2022-09-19 2024-11-07 Peter Vente GmbH & Co. KG Vorrichtung zur Aufbereitung von langgestreckten Holzelementen

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
CH473653A (de) * 1968-07-31 1969-06-15 Bauwerk Bodenbelagsind Ag Verfahren und Vorrichtung zum Schneiden von Holz und Holzwerkstoffen
US3674219A (en) * 1970-07-24 1972-07-04 Tennessee Valley Authority Green-wood fibrating means and method
DE2600948C3 (de) * 1976-01-13 1984-04-19 Knäbel, Horst, Ing.(grad.), 4005 Meerbusch Krafteinheit als Arbeitsorgan, z.B. für Pressen zum Formgeben, Verdichten usw.
ZA772210B (en) * 1976-04-15 1978-03-29 Commw Scient Ind Res Org Reconsolidated wood product
US4122236A (en) * 1977-05-09 1978-10-24 Holman John A Artificial board of lumber and method for manufacturing same
CA1098423A (fr) * 1978-03-13 1981-03-31 Macmillan Bloedel Limited Traduction non-disponible
US4371020A (en) * 1978-03-13 1983-02-01 Macmillan Bloedel Limited Three-step process for preparation of long wood strands
CA1091135A (fr) * 1978-03-13 1980-12-09 Macmillan Bloedel Limited Preparation en trois etapes de grandes lamelles de bois
US4337809A (en) * 1980-08-25 1982-07-06 Bertolette Robert K Log Splitter
AU563122B2 (en) * 1983-11-23 1987-06-25 Valjul Pty Ltd Improvements in manufacture of reconsolidated wood products
AU569764B2 (en) * 1983-11-23 1988-02-18 Commonwealth Scientific And Industrial Research Organisation Two-step compression reconsolidated wood production
NZ210304A (en) * 1983-11-23 1987-06-30 Repco Ltd Reconstituted wood product: expanded web at angle to surface
DE3482774D1 (de) * 1983-11-23 1990-08-23 Commw Scient Ind Res Org Herstellung zusammengestellter holzerzeugnisse.
AU563123B2 (en) * 1983-11-23 1987-06-25 Valjul Pty Ltd Improvements in manufacture of reconsolidated wood products
WO1985002368A1 (fr) * 1983-11-23 1985-06-06 Repco Limited Procede continu ou semi-continu de formage de produits de bois reconstitue
JPS63107505A (ja) * 1986-06-11 1988-05-12 Koyo Sangyo Kk 積層材及びその製造方法
WO1988000517A1 (fr) * 1986-07-10 1988-01-28 Wurster U. Dietz Gmbh U. Co. Maschinenfabrik Procede et dispositif de decoupage sans eclats de troncs d'arbres en produits de bois
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999010145A1 (fr) * 1997-08-21 1999-03-04 Babcock-Bsh Gmbh Procede et installation de fabrication de panneaux en materiau derive du bois

Also Published As

Publication number Publication date
CA2017727A1 (fr) 1990-11-30
US5074945A (en) 1991-12-24
AU5607690A (en) 1990-12-06
PT94207A (pt) 1991-02-08
NO902383L (no) 1990-12-03
EP0400359B1 (fr) 1994-08-31
NO173436B (no) 1993-09-06
EP0400359A3 (fr) 1992-03-18
DE59006948D1 (de) 1994-10-06
NO902383D0 (no) 1990-05-29
ATE110615T1 (de) 1994-09-15
FI902694A7 (fi) 1990-12-01
JPH03121806A (ja) 1991-05-23
AU627581B2 (en) 1992-08-27
NO173436C (no) 1993-12-15
DD294659A5 (de) 1991-10-10
DE3917452C1 (fr) 1990-10-25
FI902694A0 (fi) 1990-05-30

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