EP1623807B2 - Verfahren und Vorrichtung zur Herstellung eines Holzwerkstoffkörpers - Google Patents

Verfahren und Vorrichtung zur Herstellung eines Holzwerkstoffkörpers Download PDF

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Publication number
EP1623807B2
EP1623807B2 EP05012813.1A EP05012813A EP1623807B2 EP 1623807 B2 EP1623807 B2 EP 1623807B2 EP 05012813 A EP05012813 A EP 05012813A EP 1623807 B2 EP1623807 B2 EP 1623807B2
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EP
European Patent Office
Prior art keywords
fibers
fiber
wood
chips
spray head
Prior art date
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Application number
EP05012813.1A
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German (de)
English (en)
French (fr)
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EP1623807B1 (de
EP1623807A1 (de
Inventor
Manfred Riepertinger
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.)
Fritz Egger GmbH and Co OG
Original Assignee
Fritz Egger GmbH and Co OG
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Application filed by Fritz Egger GmbH and Co OG filed Critical Fritz Egger GmbH and Co OG
Priority to PL05012813T priority Critical patent/PL1623807T5/pl
Publication of EP1623807A1 publication Critical patent/EP1623807A1/de
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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
    • 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

Definitions

  • the present invention relates to a method for producing a wooden material body according to the preamble of claim 1. Furthermore, the invention relates to a corresponding apparatus for producing a wooden material body according to the preamble of claim 13.
  • wood material body means a body made of pressed wood particles, for example a plate-shaped body, in particular a wood-based panel.
  • Chipboard or Oriented Strand Board (OSB) boards are also covered by the term wood-based board. It is also conceivable to provide a wood-based panel of several, glued together individual plates.
  • shavings means chips, shavings or comparable particles produced by machining of any shape and size.
  • the DE 1 653 161 discloses a method of the type mentioned, namely for the production of a wooden material body, in which wood material is cut into wood chips. To improve the strength properties of the hergesteilten wood material body bands or strips of fibers are placed on the formed to a chip mat chip cake according to this document. The wood-based material body is then produced from the chips cake reinforced in this way.
  • the problem is that the reinforcement in the later Holzwerkstoffösch optimal, especially not in all levels, distributed and in this way the strength properties are not improved at least for a load in the direction of the plate longitudinal plane of a corresponding wood-based panel to any appreciable extent.
  • the document US 3231458 describes a process in which wood is crushed into chips which, after drying in a suitable mixing device, are mixed with fibers, for example glass fibers. After the chips and fibers are mixed, this mixture is mixed with a binder.
  • the binder-coated chips and fibers are placed in a mold and then pressed under pressure and temperature influence to a contoured wood material body.
  • the invention is based on the technical problem of providing an optimized method and an optimized apparatus for producing a wooden material body, with which the strength properties are further improved.
  • a material of artificial raw materials such as glass, carbon, plastic, metal, etc., or a material of natural raw material such as cellulose, hemp, flax, jute, coconut, etc. are also used as thread-like fiber material. Mixtures of these materials are also conceivable as fiber material.
  • such a thread consists of several parallel Einzelfasem or fiber parts.
  • the threads ie the filamentary fiber material
  • the threads are delivered in the form of one or more coils, onto which one or more threads are wound. It is also conceivable that the threads of several coils are connected to each other, so that a continuous thread for continuous production results, the upper runs a variety of coils.
  • a comminution of the filamentary fiber material takes place transversely to the longitudinal direction of the thread.
  • the sprinkling of the fibers is carried out with a fiber spray head provided with a cutting device.
  • a fiber spray head which has a cutting device, also the shredding into individual fibers can take place.
  • a binder is applied to the fibers immediately before shredding and / or spreading.
  • the application of the binder is preferably carried out with a fiber spray head, in particular a fiber spray head provided with a cutting device.
  • the fibers are sprinkled individually into the wood chips immediately after the shredding of the filamentary fiber material.
  • the fibers are chemically pretreated, for example by impregnation, or mechanically, for example by stretching.
  • an impregnation and / or stretching of the fibers takes place in a fiber spray head of the aforementioned type or immediately before or after. The same applies to the application of the binder to the fibers.
  • the fibers are at least partially interspersed in a predetermined direction. It is also conceivable to scatter the fibers in certain places in greater quantity than in other places.
  • a plurality of fiber spray heads of the type described above are used.
  • the fibers are interspersed in a predetermined length, in particular in a length of 10 to 50 mm. It is also conceivable to co-effect fibers of different lengths at the same time. For example, using multiple fiber spray heads, each head may incorporate fibers of a different length.
  • a fiber spray head will be described below, as it can be used and designed erfingdungsloom. It will be described below by way of example with reference to a mixing head for use in the production of plastic parts.
  • a mixing head for use in the production of plastic parts.
  • the following description refers to an application for the production of plastic parts, according to the present invention it may be correspondingly applied to the manufacture of wood-based panels.
  • An apparatus for producing reinforced fiber reinforced plastic parts having a mixing chamber for producing a mixture of chemically reactive plastic components, having a cylindrical outlet chamber (7, 70) downstream of the mixing chamber, in which there is a tubular extension (11, 81) whose outside diameter is smaller than that inner diameter of the outlet chamber (7; 70) and with the inner wall of the outlet chamber (7,70) includes an annular flow channel for the mixture of the chemically reactive plastic components, wherein in the tubular extension (11,81) into the outlet chamber (7,70 ), wherein the tubular projection (11, 81) is arranged on the end face (8, 80 ') of a cleaning piston (8, 80) guided reversibly in the outlet chamber (7, 70) and that the fiber Delivery channel conveyor rollers (140, 150) are associated with a cutting device (160) for supplying fibers.
  • a mixture of chemically reactive plastic components is passed as a flowable plastic in a cylindrical outlet chamber in which a cleaning piston is reversibly guided and extends through the center region of a fiber feed channel.
  • a cleaning piston is reversibly guided and extends through the center region of a fiber feed channel.
  • annular flow passage is created in the outlet chamber through which forms a tubular mixture flow, in the center region of the fiber feed channel opens, whereby the possibility exists to introduce long reinforcing fibers in the flowable plastic.
  • the fiber conveying channel preferably arranged in pairs at its inlet opening arranged conveying rollers which pull an endless fiber strand from a spool and shoot at high speed through the fiber conveying channel.
  • These conveyor rollers are provided with cutting means, whereby the reinforcing fibers can be divided into sections of a certain length. If a plurality of conveyor roller pairs with different diameters for producing fiber sections of different lengths arranged side by side and these conveyor rollers can be positioned in any order to the inlet opening of the fiber conveyor channel, then the flow of flowable plastic in time sequence reinforcing fibers can be added in different lengths. This is particularly advantageous when the device for generating the two streams of flowable plastic and long reinforcing fibers is passed over the surface of a plastic molding tool to produce a planar, with long reinforcing fibers interspersed plastic part.
  • a plastic part By varying the length of the fiber sections by Zupositionierung the corresponding conveyor rollers on the inlet opening of the fiber conveying channel, a plastic part can be created, which, depending on the strength requirements and shape, fibers of different lengths. So it can be e.g. be advantageous to cover strongly inclined surface areas of the mold with flowable plastic containing particularly long reinforcing fibers. Likewise, it can be ensured by different speed of the conveyor rollers that the plastic part is traversed in certain areas with fibers in higher or lower density. The reinforcing fibers are completely encased in flowable plastic.
  • the created with the above device annular flow channel can be created instead of a fixedly connected to the cleaning piston tubular approach with the help of a dip tube, which passes through the cleaning piston centrally and forms the fiber feed channel.
  • a dip tube which passes through the cleaning piston centrally and forms the fiber feed channel.
  • the cleaning piston can be moved independently of the dip tube.
  • the dip tube may pass through the cleaning piston and its hydraulic actuators and be secured in the housing of the device. This has the advantage that the means for generating long Verstärkungsfasem and for transporting these reinforcing fibers can be fixed to the housing through the fiber conveying channel in the dip tube.
  • the Fig. Shows the mixing head of a polyurethane system in which chemically reactive plastic components, such as polyol and isocyanate are mixed to form a mixture of flowable plastic.
  • Fig. 1 is arranged in a mixing chamber 1, a control piston 2, the means of a hydraulic piston 3 reversible in the mixing chamber 1 is guided.
  • injection openings (not shown) leading perpendicular to the drawing surface open for the chemically reactive plastic components.
  • the control piston 2 With the control piston 2, the injection openings are simultaneously opened and closed, likewise the control piston 2 fulfills the function to expel the reaction mixture formed in the mixing chamber 1 from the reactive plastic components from the mixing chamber 1 and to clean the walls of the mixing chamber 1 from the reaction mixture.
  • a calming chamber 4 is arranged, in which a first cleaning piston 5 is reversibly guided.
  • the first cleaning piston 5 can be actuated by means of a second hydraulic piston 6.
  • the outlet pipe 7 opens with its discharge opening 10 in the mold cavity of an injection mold (not shown).
  • the second cleaning piston 8 and the third hydraulic piston 9 are centrally penetrated by a dip tube 11 which is fixed in the cylinder cover 12 of the hydraulic cylinder 13.
  • dip tube 11 for the introduction of long fibers, for example for introducing strands of glass fibers or carbon fibers.
  • the fiber strands are detected by conveyor rollers 14 and 15 and injected through the immersion tube 11 arranged in the central bore 83 'into the reaction mixture.
  • One of the conveyor rollers 14 may be provided with cutters in the form of four distributed on the roll circumference knives 16, whereby the fiber strand sections can be divided into certain lengths. The length of the sections can be varied as required. In principle, fiber strands previously divided into length sections can also be injected through the dip tube 11 into the reaction mixture via the conveyor rollers 14 and 15. The fiber strand is first detected by the feed roller 17 and the pressure roller 18 after insertion through the insertion opening 17, whereupon the fiber strand passes between the two conveyor rollers 14 and 15 and is shot centrically thereof through the dip tube 11.
  • the long fiber strands or other fillers in any areas of the outlet pipe 7 can be injected into the reaction mixture.
  • the fibers or other fillers arrive centrally in the reaction mixture flowing through the outlet pipe 7 and are thus uniformly distributed in the casting during the transfer into the mold cavity.
  • the conveyance of the fiber strands or other fillers through the dip tube 11 may be accomplished by a fluidizing means, such as e.g. Compressed gas, which is introduced through the opening 19.
  • a fluidizing means such as e.g. Compressed gas
  • other fluid agents may also be introduced into the reaction mixture.
  • fillers with a fluidizing gas can additionally be introduced into the reaction mixture.
  • a dip tube 11 which passes through the cleaning piston 8 reversibly guided in the outlet pipe 7.
  • a dip tube of the type described can also be arranged in the control piston 2 and in the mixing chamber 1 of a simple straight mixing head, the mixing chamber 1 no settling chamber 4 is arranged downstream.
  • the dip tube 11 can also be arranged in a mixing head, which consists only of a mixing chamber 1 and a settling chamber 4, in the cleaning piston and in the settling chamber.
  • the Fig. 2 shows one after the mixing head Fig. 1 corresponding mixing head, wherein the same reference numerals 1 to 6 were used for the matching functional elements.
  • the outlet pipe 70 opens with its discharge opening 100 in the mold cavity of an injection mold (not shown).
  • the second cleaning piston 80 has a tubular extension 81 and the third hydraulic piston 90 has a tubular extension 82.
  • Both the tubular extension 81 and the tubular extension 82 are formed by a tube firmly pressed in the cleaning piston 80, so that the cleaning piston 80, the tubular extension 81 and the tubular extension 82 form a unitary component.
  • the tubular extension 81 and the tubular extension 82 may also be integrally connected to the cleaning piston 80, i. All parts can consist of a one-piece turned part.
  • By the cleaning piston 80 and the tubular extension 81 and the tubular extension piece 82 extends a central bore 83 which is surrounded by a dip tube 111.
  • the cleaning piston 80 and the tubular extension 82 pass through a cylinder cover 120.
  • the meeting of the fillers with the reaction mixture can be freely selected depending on the length of the tubular extension 81 or the axial positioning of the cleaning piston 80.
  • the fillers are encased in the reaction mixture and mix due to the fact that the fillers and the reaction mixture are conveyed in the same direction of transport in a particularly gentle manner,
  • the inventive method and the devices specified for this purpose are therefore particularly suitable for the addition of long fibers in the Reaction mixture, in particular strands of glass fibers or carbon fibers.
  • natural fibers such as hemp fibers can also be used.
  • the fibers e.g., fiberglass rovings wound endlessly on a fiber bobbin are gripped by conveyor rolls 140 and 150 and introduced through the central bore 83 into the tubular reaction mixture.
  • the conveyor rollers 140 and 150 and their drives are mounted on a housing 84 attached to the tubular extension piece 82 and move together with the cleaning piston 80.
  • One of the conveyor rollers 140 is provided with cutters in the form of knives 160 distributed on the roll periphery, whereby the fiber strand can be subdivided into specific lengths.
  • the length of the sections can be varied as required, depending on the number of knives and roll circumference.
  • the fiber strand is first detected by the feed roller 170 and the pressure roller 180 after insertion through the insertion opening 170, whereupon the fiber strand passes between the two feed rollers 140 and 150 and is shot centrally from the latter into the bore 83.
  • the conveyor rollers 140 and 150 and the housing 84 may be fixed independently of the cleaning piston 80 instead of being attached to the tubular extension 82 or the cleaning piston 80, e.g. on the cylinder cover 120, wherein the transfer of the accelerated from the conveyor rollers 140 and 150 fiber strands can be made in the central bore 83 in the tubular extension piece 82 by interposition of a telescopic tube.
  • the transport speed at which the fiber strands are shot through the central bore 83 is matched to the flow rate of the tube-like reaction mixture flow according to the proviso that with intensive and homogeneous mixing of the long fiber sections with the reaction mixture fiber breakage can be excluded in any case.
  • the mixing can e.g. At the same transport speeds of the two elements take place, but it can also be increased by low speed differences and thereby caused at the contact areas between fibers and reaction mixture shear flows, the mixing effects.
  • the reaction mixture exiting the settling chamber 4 is deflected in the outflow chamber 70 and formed into a tubular flow stream through the annular channel formed by the outlet tube 70 and the tubular extension 81, into the centric opening of which the fillers are introduced.
  • the fillers are thereby not brought into direct contact with the reaction mixture but only in the course of a rectified with the reaction mixture transport phase.
  • the outlet tube 7 and 70 can also be connected to a plasticizing unit, as is useful in a plastic injection molding machine for the production of plastic parts made of thermoplastic material. Also, a connection to an extruder is possible. Both devices provide flowable plastic in the form of a thermoplastic plastic melt.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Steering Controls (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
EP05012813.1A 2004-08-06 2005-06-15 Verfahren und Vorrichtung zur Herstellung eines Holzwerkstoffkörpers Active EP1623807B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05012813T PL1623807T5 (pl) 2004-08-06 2005-06-15 Sposób i urządzenie do wytwarzania korpusu z tworzywa drzewnego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004038543A DE102004038543B4 (de) 2004-08-06 2004-08-06 Verfahren und Vorrichtung zur Herstellung eines Holzwerkstoffkörpers

Publications (3)

Publication Number Publication Date
EP1623807A1 EP1623807A1 (de) 2006-02-08
EP1623807B1 EP1623807B1 (de) 2009-03-11
EP1623807B2 true EP1623807B2 (de) 2016-06-01

Family

ID=34937452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05012813.1A Active EP1623807B2 (de) 2004-08-06 2005-06-15 Verfahren und Vorrichtung zur Herstellung eines Holzwerkstoffkörpers

Country Status (6)

Country Link
EP (1) EP1623807B2 (es)
AT (1) ATE424980T1 (es)
DE (2) DE102004038543B4 (es)
ES (1) ES2321413T5 (es)
PL (1) PL1623807T5 (es)
PT (1) PT1623807E (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005038833B4 (de) * 2005-08-17 2010-06-17 Kronotec Ag OSB-Platte und Verfahren zur Herstellung einer OSB-Platte
ES2623824T3 (es) 2014-05-02 2017-07-12 SWISS KRONO Tec AG Procedimiento e instalación para fabricar un panel de fibras de madera
ES2857503T3 (es) 2014-11-20 2021-09-29 Flooring Technologies Ltd Procedimiento para ennoblecer un tablero de material derivado de la madera

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528154A (en) † 1983-06-15 1985-07-09 Atlantic Richfield Company Preparation of molded lignocellulosic compositions using an emulsifiable polyisocyanate binder and an emulsifiable carboxy functional siloxane internal release agent
US5002713A (en) † 1989-12-22 1991-03-26 Board Of Control Of Michigan Technological University Method for compression molding articles from lignocellulosic materials
EP0771259B1 (de) † 1995-05-08 2003-08-06 Krauss-Maffei Kunststofftechnik GmbH Vorrichtung zur herstellung von mit verstärkungsfasern durchsetzten kunststoffteilen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1653161A1 (de) * 1966-05-21 1971-01-21 Friedrich Bilger Armierung von Holzstoffplatten sowie Pressplatten und Formteilen mit Holzanteilen
DE1703076A1 (de) * 1968-03-28 1972-01-05 Teutoburger Sperrholzwerk Geor Spanplatte sowie Verfahren zu ihrer Herstellung
GB1360803A (en) * 1972-04-21 1974-07-24 Nat Res Dev Fibrereinforced articles
SE8008552L (sv) * 1980-12-05 1982-06-06 Lars Hammarberg Armerad tremasseskiva jemte sett for dess framstellning
GB2248246A (en) * 1990-09-14 1992-04-01 Furniture Ind Res Ass Reinforced fiberboard
AT407507B (de) * 1997-12-18 2001-04-25 Oesterreichische Homogenholz G Holzspanplatte mit hoher biegefestigkeit und hohem biege-e-modul
DE19805996A1 (de) * 1998-02-16 1999-09-16 Rolf Hesch Vorrichtung und Verfahren zur Herstellung eines Faserverbundes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528154A (en) † 1983-06-15 1985-07-09 Atlantic Richfield Company Preparation of molded lignocellulosic compositions using an emulsifiable polyisocyanate binder and an emulsifiable carboxy functional siloxane internal release agent
US5002713A (en) † 1989-12-22 1991-03-26 Board Of Control Of Michigan Technological University Method for compression molding articles from lignocellulosic materials
EP0771259B1 (de) † 1995-05-08 2003-08-06 Krauss-Maffei Kunststofftechnik GmbH Vorrichtung zur herstellung von mit verstärkungsfasern durchsetzten kunststoffteilen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Wikipedia Ausdruck "Roving" vom 02.12.2009 †

Also Published As

Publication number Publication date
PL1623807T5 (pl) 2017-07-31
DE102004038543B4 (de) 2008-10-09
PL1623807T3 (pl) 2009-08-31
ATE424980T1 (de) 2009-03-15
ES2321413T3 (es) 2009-06-05
DE502005006792D1 (de) 2009-04-23
EP1623807B1 (de) 2009-03-11
EP1623807A1 (de) 2006-02-08
DE102004038543A1 (de) 2006-03-16
PT1623807E (pt) 2009-04-23
ES2321413T5 (es) 2016-11-07

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