WO1999062680A1 - Bois synthetique a appliquer, notamment pour meubles, et son procede de fabrication - Google Patents

Bois synthetique a appliquer, notamment pour meubles, et son procede de fabrication Download PDF

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Publication number
WO1999062680A1
WO1999062680A1 PCT/EP1999/003650 EP9903650W WO9962680A1 WO 1999062680 A1 WO1999062680 A1 WO 1999062680A1 EP 9903650 W EP9903650 W EP 9903650W WO 9962680 A1 WO9962680 A1 WO 9962680A1
Authority
WO
WIPO (PCT)
Prior art keywords
wood
hollow cylinder
adhesive
molded part
mold
Prior art date
Application number
PCT/EP1999/003650
Other languages
German (de)
English (en)
Inventor
Barry Lipman
Original Assignee
Steinhoff Germany Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE1998124577 external-priority patent/DE19824577C2/de
Priority claimed from DE1998141852 external-priority patent/DE19841852A1/de
Application filed by Steinhoff Germany Gmbh filed Critical Steinhoff Germany Gmbh
Priority to EP99936161A priority Critical patent/EP0999924A1/fr
Publication of WO1999062680A1 publication Critical patent/WO1999062680A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
    • 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
    • B27N5/00—Manufacture of non-flat articles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B95/00—Fittings for furniture
    • A47B95/02—Handles
    • A47B2095/028—Knobs

Definitions

  • the invention relates to a process for the production of synthetic wood applications, in particular for furniture, in which a paste or dough is produced from wood particles and a binder which is shaped in a mold into a molded part, and synthetic wood application produced thereafter and furniture decorated therewith.
  • Such a method is known from DE 30 19 068 AI.
  • wood particles preferably wood fibers
  • wood particles are sprayed with an aqueous dispersion of a polyvinyl acetate and pre-compressed to a coarse fleece and then pressed under pressure and heat into a molded part.
  • the adhesive is bonded using the hot glue, which softens at elevated temperature, and hardens again when removed from the mold.
  • the object of the invention is to provide a simple and inexpensive alternative to the prior art.
  • wood flour made from resinous woods preferably pine wood flour
  • a cold-curing adhesive preferably vinyl acetate adhesive
  • the subclaims 2 to 11 contain design features which represent advantageous and beneficial developments of the task solution.
  • the synthetic wood application according to the invention is preferably formed from pure pine wood flour and a cold-curing vinyl acetate adhesive.
  • This pine wood flour accumulates in furniture production and can then be produced in a cost-effective manner with the adhesive for solid synthetic wood applications.
  • the wood pulp is mixed with the adhesive, pressed, and then the application is applied to the pasty, and / or on and / or in furniture parts, this application then combining with the adhesive contained in the paste with the furniture parts, then drying and hardens and a favorable connection has been made with the furniture parts.
  • these synthetic wood applications can be pasty fix in various shapes on the furniture parts and also around curves.
  • the applications are continuously pressed as an endless strand, cut to length in the still doughy state and then introduced in the doughy state into the grooves or the like of the solid wood or placed around furniture parts all around.
  • the strand application is wound up after shaping and can then harden.
  • the hardened, rolled-up strand can be softened again by warm water and then molded onto the furniture contour.
  • Stronger furniture applications can be filled and stabilized by inlays made of wood or MDF material, the molded part being pressed onto these inlays.
  • the applications can also be made from the paste with glue in a wide variety of patterns and sizes.
  • the applications have the appearance and strength of a solid wood. These applications are still easy to recycle.
  • epoxy resin is suitable as the plastic molding material.
  • a doughy mass of wood flour with dissolved high polymer vinyl acetate is suitable as thermoplastic mass, which is also used for the production of
  • the hollow cylinder of the intermediate form is advantageously divided into segments that can be dismantled, so that demolding can be carried out easily.
  • the segments are recyclable.
  • the first copy can also be made from a slightly flexible silicone or the like.
  • the wood flour-vinyl acetate polymer dough is prepared in such a way that the wood flour, preferably pine wood flour, is stirred and kneaded into the polymer dissolved in a common solvent, for example acetone.
  • a common solvent for example acetone.
  • An emulsifier for example lecithin, and / or a few percent by weight of petroleum jelly can be added as mixing aids.
  • the design options of the applications that can be produced in this way are very diverse, but it is advantageous to provide them with a slight draft slope, the slope in particular in the rolling direction being selected so that the beginning of the object is easily detached. Spraying the mold with a release agent makes molding even easier.
  • a metallization layer is suitable for extending the service life of the plastic surface, e.g. a zinc layer which is to be applied in a flame spraying process.
  • the epoxy resin mold is expediently covered with flanges on the cylindrical end faces and held on the core, via which the embossing force must be transferred to the mold and the doughy material to be processed.
  • the flanges laterally displace unnecessary strand material, which is then recycled.
  • FIG. 1 is a side view in partial section of a strand-shaped synthetic wood application
  • FIG. 2 shows a top view of the application according to FIG. 1,
  • FIG. 3 shows a perspective in partial section of the strand-shaped application inserted into a groove of an elongated wooden support part
  • Fig. 4 is a perspective of a furniture knob with in a
  • FIG. 6 shows a top view and a cross section of an application pattern
  • FIG. 8 shows a front view and a longitudinal section through and an application pressed onto a carrier part
  • FIG. 9 10 is a box shape with original sample, (prior art)
  • FIG. 11 shows a section A-A through Fig. 10 and the demolded Primarfor, (prior art),
  • FIG. 12 shows the mandrel with form closure to FIG. 12,
  • the synthetic wood application in particular for moles, is pressed as a molded part (1, 2, 3) from a paste of wood flour (4) and binder (5).
  • the molded pulp consists of wood flour from resinous wood, preferably predominantly from pine wood flour (4) and from a cold-hardening adhesive (5). Pure pine wood flour and a cold-hardening vinyl acetate liver are preferably used.
  • the molded part (1) is preferably produced as a strand (1) according to FIGS. 1 to 5 and this strand (1) is in the doughy state on and / or on a support body (6), such as furniture parts (side part, door, cover and base, armrest or the like), applied to wooden profiles and the strand (1) then connects with the adhesive (5) contained in the paste to the support body (6, 7) and dries and hardens.
  • the cross-sectional shape of the strand (1) can be of any design, such as part-circular, angular or the like, with a flat or concave or convex sample side.
  • the strand of the dough can be placed around the furniture button () and molded into grooves (8).
  • the slurry can be a profile, a
  • the molded part (3) can be pressed out of the slurry onto and / or around a support part (6) made of laminate, such as MDF laminar, or wood, as shown in FIGS. 8 and 9, as a result of which the application becomes dimensionally stable.
  • the fastening side (la, 2a, 3a) of the molded part (1, 2, 3) can be flat or curved.
  • the visible side of the molded part (1, 2, 3) has a pattern (10) - structure - formed by elevations and / or depressions.
  • the porridge (the pine wood flour 4) is mixed with the adhesive (5) and after the compression molding to the molded part (1,2,3), the pasty and inserted molded part (1,2,3) is dried and hardened so that it is a solid, wood-like shape.
  • the applications (2, 3) can also be produced in terms of manufacture with connecting and fastening parts (9), such as pins, springs, holes, grooves or the like, formed from the slurry (4, 5) (FIG. 8).
  • the doughy shaped part (1, 2, 3) can also be pressed after a certain, not yet hardened drying time.
  • the applications (1, 2, 3) are cold pressed and then harden in the air.
  • the strand-shaped application (1) is wound up after pressing and then hardens.
  • the then hard strand application (1) is placed in warm water for further processing, in which it softens again and can then be pressed and shaped.
  • Fig. 10 shows a box shape (11) in supervision, on the bottom (Fl) of which is arranged an underside flat, upwardly raised prototype (UR), which is known Way is poured with a molding compound (KF), preferably from a suitable epoxy resin.
  • UR underside flat, upwardly raised prototype
  • KF molding compound
  • Fig. 11 shows a vertical section AA and above the solidified molding compound, which is a primary mold (PF) after triggering the original (UR), which is to be repeatedly filled with a pasty moldable mass (M), so that the moldings it can be taken as the first just oriented copies (Kl, Kl *) that can be bent before the final hardening or after a re-softening.
  • PF primary mold
  • M pasty moldable mass
  • Hollow cylinder jacket (HM1, HM2) in supervision, in which the first copies (K1B, K1B *) are introduced in a curved design with the originally flat side adapted to the inside of the cylinder and sealed and fixed there at the edge.
  • the mold sectors (HM1, HM2) are put together and fixed, and then a cylinder core (ZK) and an end face sealing plate (S) -Fig. 13- inserted into the hollow cylinder or attached to the end of this.
  • the cylindrical space surrounding the cylinder core and the curved primary copies (K1B, K1B *) is then poured out with a hardening plastic molding compound, for example epoxy resin.
  • a hardening plastic molding compound for example epoxy resin.
  • the cylinder jacket segments (HM1, HM2) and the primary copies (K1B, K1B *) are removed, which completes the cylindrical secondary shape (SF), which is shown in radial section in FIG. 15.
  • the cylinder core (ZK) preferably remains in the Plastic mold as a receptacle for a drive shaft (W), as shown in Fig. 16.
  • the cylindrical shape (SF) is rolled in a known manner with its cylindrical surface over a conveyor table (FT) or on a counter roller on which a strand of the mass (M) to be formed lies. This is structured with the mold cavities (FH) and the remaining mass (RM) is pushed out of the mold sideways.
  • two identical mold cavities (FH) are arranged one behind the other on the cylinder circumference; whole sentences, e.g. pattern-like pattern form spaces are arranged there and shaped in one revolution.
  • FIG. 18 shows in sections a further secondary forme cylinder (SF3), which produces a single copy of a furniture application (KM) per revolution on the form table (FT) in the material strand (M).
  • the length of the application (KM) thus corresponds approximately to the cylinder circumference. Since the application (KM) has relatively steep, high side flanks, it only comes out of the mold cavity after a short lift. The detachment is therefore preferably promoted by a release agent.
  • the compressive stress on the mold is far lower than in the case of a flat parallel press mold, since only one is relative small mold area is actively in contact with the plastic medium. This protects the shape and can be used for a long time.
  • the hollow cylinder as well as the cylinder core and the end wall, which are used to manufacture the cylindrical shape, can be produced from MDF material (medium-density fiber pressed material) without great effort.
  • MDF material medium-density fiber pressed material
  • Several MDF boards can be connected in a stack if the usual board thicknesses are not sufficient to fully accommodate the width of the pattern.
  • the hollow cylinder mold with the curved model is treated with a release agent before the epoxy resin is poured in, so that it is easier to pull off the mold segments and to release the models.
  • the stretched one-sided flat original (UR) in the box mold (11) is covered with a plastic Pour molding material that hardens into a level oriented primary mold (PF), which is emptied from the original (UR) and filled with a moldable thermoplastic mass (M), which then forms a level oriented first copy (Kl, Kl *) of the primary shape (PF ) removed and bent in a hollow cylinder (HM1, HM2) with the originally flat side to match and fixed therein; in addition, the hollow cylinder (HM1, HM2) has an end wall seal (S) and possibly a cylinder core (ZK), and the molding space (FR) thus formed is filled with a plastic molding material (KF), after the hardening of which the hollow cylinder (HM1, HM2) and the first copy (Kl, Kl *) are removed, so that an exposed cylindrical secondary mold
  • the moldable thermoplastic mass (M) is made from a dissolved thermoplastic, enriched with a high filler content.
  • thermoplastic is a highly polymeric vinyl acetate into which wood flour is introduced as a filler.
  • thermoplastic is dissolved in acetone or the like and at least one emulsifier, such as lecithin or petroleum jelly, is added to the solution in a few percent by weight of the total mass.
  • emulsifier such as lecithin or petroleum jelly
  • the first copy (Kl, Kl *) is taken from the primary form (PF), solidified by evaporation of the solvent and heated and softened in warm water and then introduced into the hollow cylinder (HM1, HM2).
  • the mold cavity (FK) is filled with a release agent before filling with plastic molding material (KF).
  • a hardening mixture of epoxy resin and hardener is used as the plastic molding material (KF).
  • one or more first copies (K1B, K1B *) of the same or different originals (UR) are bent, spaced apart from one another on the inner wall of the cylinder, or arranged and fixed all the way round.
  • solvents individually or mixed are examples of solvents individually or mixed:
  • Hydrocarbons e.g. B. trichlorethylene

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Le bois synthétique à appliquer, notamment pour meubles, se présente sous la forme d'une pièce façonnée (1, 2, 3) obtenue par compression d'une pâte constituée de farine de bois et de liants. Cette pâte se compose de farine de bois de pin commun (4) pure et de colle d'acétate vinylique (5). La pièce façonnée (1) se fabrique sous forme de boudin et s'applique sur ou dans des parties de support (7) et autour de celles-ci. La pâte peut également être comprimée pour former un profilé, un motif tel qu'un motif à fleurs, une couronne, une rosace ou analogue, ou bien peut être appliquée par pression sur une partie de support en laminé ou en bois.
PCT/EP1999/003650 1998-06-02 1999-05-26 Bois synthetique a appliquer, notamment pour meubles, et son procede de fabrication WO1999062680A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99936161A EP0999924A1 (fr) 1998-06-02 1999-05-26 Bois synthetique a appliquer, notamment pour meubles, et son procede de fabrication

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19824577.7 1998-06-02
DE1998124577 DE19824577C2 (de) 1998-06-02 1998-06-02 Kunstholzapplikation, insbesondere für Möbel, und Herstellverfahren
DE19841852.3 1998-09-12
DE1998141852 DE19841852A1 (de) 1998-09-12 1998-09-12 Verfahren zur Herstellung einer Preßform

Publications (1)

Publication Number Publication Date
WO1999062680A1 true WO1999062680A1 (fr) 1999-12-09

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PCT/EP1999/003650 WO1999062680A1 (fr) 1998-06-02 1999-05-26 Bois synthetique a appliquer, notamment pour meubles, et son procede de fabrication

Country Status (2)

Country Link
EP (1) EP0999924A1 (fr)
WO (1) WO1999062680A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003002319A1 (fr) * 2001-05-31 2003-01-09 Masonite Corporation Plinthe decorative ou moulure couronnee
US6588162B2 (en) 2000-04-20 2003-07-08 Masonite Corporation Reverse molded panel
US7426806B2 (en) 2000-04-20 2008-09-23 Masonite Corporation Reverse molded panel, method of manufacture, and door manufactured therefrom
US9284772B2 (en) 2000-04-20 2016-03-15 Masonite Corporation Reverse molded plant-on panel component, method of manufacture, and method of decorating a door therewith

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042564A (en) * 1979-01-15 1980-09-24 Muntwyler Hochstrasser H Adjuvant mixture for use in the making of a plastic mouldable material
DE3019068A1 (de) * 1979-07-24 1981-02-19 Wtz Holzverarbeitende Ind Verfahren zur herstellung von formteilen aus thermoplastdispersionen und holzpartikeln
EP0159457A1 (fr) * 1984-04-26 1985-10-30 SOL.MAR. DI SOLDERA FIORENZO E MARTINUZZO ALBERTO s.a.s. Procédé de fabrication de panneaux pour meubles, par moulage, et panneaux de meubles ainsi fabriqués
JPS63283906A (ja) * 1987-05-18 1988-11-21 Nippon Sewing Mach T-Buru Kougiyoukumiai 導電性成型品の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042564A (en) * 1979-01-15 1980-09-24 Muntwyler Hochstrasser H Adjuvant mixture for use in the making of a plastic mouldable material
DE3019068A1 (de) * 1979-07-24 1981-02-19 Wtz Holzverarbeitende Ind Verfahren zur herstellung von formteilen aus thermoplastdispersionen und holzpartikeln
EP0159457A1 (fr) * 1984-04-26 1985-10-30 SOL.MAR. DI SOLDERA FIORENZO E MARTINUZZO ALBERTO s.a.s. Procédé de fabrication de panneaux pour meubles, par moulage, et panneaux de meubles ainsi fabriqués
JPS63283906A (ja) * 1987-05-18 1988-11-21 Nippon Sewing Mach T-Buru Kougiyoukumiai 導電性成型品の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 090 (M - 803) 2 March 1989 (1989-03-02) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6584743B2 (en) 2000-04-20 2003-07-01 Masonite Corporation Decorative skirting (base) board or crown molding
US6588162B2 (en) 2000-04-20 2003-07-08 Masonite Corporation Reverse molded panel
US7426806B2 (en) 2000-04-20 2008-09-23 Masonite Corporation Reverse molded panel, method of manufacture, and door manufactured therefrom
US7721499B2 (en) 2000-04-20 2010-05-25 Masonite Corporation Reverse molded panel
US7730686B2 (en) 2000-04-20 2010-06-08 Masonite Corporation Reverse molded panel
US9284772B2 (en) 2000-04-20 2016-03-15 Masonite Corporation Reverse molded plant-on panel component, method of manufacture, and method of decorating a door therewith
US9657512B2 (en) 2000-04-20 2017-05-23 Masonite Corporation Reverse molded plant-on panel component, method of manufacture, and method of decorating a door therewith
WO2003002319A1 (fr) * 2001-05-31 2003-01-09 Masonite Corporation Plinthe decorative ou moulure couronnee

Also Published As

Publication number Publication date
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