EP0253628A2 - Méthode pour la fabrication de feuilles de contre-plaqué - Google Patents

Méthode pour la fabrication de feuilles de contre-plaqué Download PDF

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Publication number
EP0253628A2
EP0253628A2 EP87306219A EP87306219A EP0253628A2 EP 0253628 A2 EP0253628 A2 EP 0253628A2 EP 87306219 A EP87306219 A EP 87306219A EP 87306219 A EP87306219 A EP 87306219A EP 0253628 A2 EP0253628 A2 EP 0253628A2
Authority
EP
European Patent Office
Prior art keywords
adhesive
layers
sheets
applying
strips
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.)
Withdrawn
Application number
EP87306219A
Other languages
German (de)
English (en)
Other versions
EP0253628A3 (fr
Inventor
Alan Charles Rotherham
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.)
TEE-SERT Pty Ltd
Tee Sert Pty Ltd
Original Assignee
TEE-SERT Pty Ltd
Tee Sert Pty Ltd
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 TEE-SERT Pty Ltd, Tee Sert Pty Ltd filed Critical TEE-SERT Pty Ltd
Publication of EP0253628A2 publication Critical patent/EP0253628A2/fr
Publication of EP0253628A3 publication Critical patent/EP0253628A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets

Definitions

  • the present invention relates to a method for the manufacture of plywood sheet.
  • Conventionally plywood has been manufactured by the following method. Firstly, dry sheets of timber veneer are passed either through rollers or past spray heads which apply a coating of adhesive to the surface's top and bottom. Interleaved with the sheets to which glue has been applied, are dry sheets of veneer, usually, but not always, with the grain direction running in the opposite direction to the glued sheets. The wet pack of veneer sheets are then placed into either flat or curved moulds and the moulds closed by hydraulic pressure. The pack is held in situ until the glues have cured by heating. The time the pack is cured is dependent on the thickness and type of glue used. Once the glue has cured, the sheets are then removed from the press.
  • a method of manufacturing a laminated sheet consisting of at least two layers secured together including the following steps: providing at least two of said layers, applying an adhesive to at least one major surface of one of said layers, applying the other layer to said surface so that upon curing of said adhesive said layers are fixed together, and wherein the step of applying said adhesive comprises applying a first adhesive to portions of said surface which first adhesive has a predetermined curing time, and also applying a second adhesive to further portions of said surface, with said second adhesive having a shorter curing time than said first adhesive so that said second adhesive retains said layers in a fixed relative position while said first adhesive cures.
  • FIG. 10 there is schematically depicted a laminated sheet of plywood 10.
  • the sheet 10 consists of several layers of timber veneer 11 which are to be secured together to form a sheet of plywood.
  • the sheet 10 is actually a "wet" sheet with the glue still to be cured.
  • the sheets 11 are to be fixed together by means of glue strips 12 and 13.
  • the strips 12 and 13 are located between each pair of adjacent sheets 11.
  • the glued strips 12 and 13 are alternatively arranged, however, other arrangements are contemplated for other materials.
  • the strips 12 consist of a normal adhesive used for cold setting bonding, ie. a PVA, or an EVA glue.
  • the beads 13 are of a quicker setting glue, preferably a foamed hot melt adhesive as applied by the Nordson (Registered Trade Mark) applicators sold by Nordson Corporation, 350 Research Court, Technology Park/Atlanta, Norcross, Georgia 30092, USA.
  • Nordson Registered Trade Mark
  • the material characteristics of most hot melt adhesives are improved by dissolving in the hot melt adhesive a gas such as nitrogen or carbon dioxide.
  • the hot melt adhesive is volumetrically metered. When the hot melt adhesive, with gas dissolved, is applied to the veneer, the hot melt adhesive foams as it is exposed to atmospheric pressure.
  • the hot melt adhesive with an advantage in that the "open time" is increased.
  • the open time refers to the maximum allowable time available between the deposition of the adhesive and joining of the layers so that a useful bond can still be formed.
  • the hot melt adhesive still retains its fast setting time and it has been found that by foaming the hot melt, it is possible to shorten the set time.
  • the strips 12 and 13 are of a predetermined size and are spaced apart so that the resulting glue layer will be generally continuous between any two abutting layers 11.
  • a curing time of 8 seconds for the strips 13 is all that is required. This is in contrast to 8 minutes in a conventional system.
  • the glue strips 13 hold the sheets in a compacted configuration with the glue strips 12 cure.
  • the above described preferred embodiment of the present invention has the advantages that expensive moulds and heating equipment are not required. This reduces energy consumption and reduces the capital investment requried to produce the plywood sheets.
  • the sheets are formed quickly and cleaning of the glue applicators is considerably less in comparison to standard glue machines using thermal setting glues. In these standard machines, a great deal of maintenance is required.
  • the applicators can be clean flushed relatively easily. eg. a flushing operation may only take 10 minutes and may need only to be performed every six weeks.
  • the sheets are depicted as forming a generally planar plywood sheet. If the layers 11 are placed in a contoured mould, a shaped product can be produced.
  • strips 12 could consist of an adhesive which is heat curable or curable by other means such as exposure to ultra violet light.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
EP87306219A 1986-07-15 1987-07-14 Méthode pour la fabrication de feuilles de contre-plaqué Withdrawn EP0253628A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU6926/86 1986-07-15
AU692686 1986-07-15

Publications (2)

Publication Number Publication Date
EP0253628A2 true EP0253628A2 (fr) 1988-01-20
EP0253628A3 EP0253628A3 (fr) 1988-08-17

Family

ID=3697533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87306219A Withdrawn EP0253628A3 (fr) 1986-07-15 1987-07-14 Méthode pour la fabrication de feuilles de contre-plaqué

Country Status (1)

Country Link
EP (1) EP0253628A3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292813A2 (fr) * 1987-05-26 1988-11-30 REICH Spezialmaschinen GmbH Procédé et dispositif pour joindre des éléments latéraux aux parties frontales d'ouvrages en forme de plaque
WO2002096607A1 (fr) * 2001-05-31 2002-12-05 Hans Niedermayer Plaque comportant une face et moyens permettant de coller ladite face a la face d'une autre plaque
US7226517B2 (en) * 2004-01-30 2007-06-05 Paul Lane Method of surfacing a substrate
EP1992759A2 (fr) * 2007-05-14 2008-11-19 Fritz Egger GmbH & Co. Panneau de construction léger
JP2015120324A (ja) * 2013-12-25 2015-07-02 Dic株式会社 積層体、木質板、化粧板、及び、積層体の製造方法
GB2579813A (en) * 2018-12-14 2020-07-08 Rivdal Developments Ltd Improvements in relating to the bonding of solid wood, mdf, particle board or such like

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146641B (de) * 1961-03-22 1963-04-04 Paul Lechler Kunststoff Chemie Verfahren zum Aufkleben von Platten oder anderen Bauteilen auf einen Untergrund
BE668090A (fr) * 1964-08-11 1966-02-10
JPS5347506A (en) * 1976-10-06 1978-04-28 Minami Machine Method of horizontally jointing raw veneers
JPS5563258A (en) * 1978-11-08 1980-05-13 Nat Jutaku Kenzai Preparation of panel
JPS58185673A (ja) * 1982-04-23 1983-10-29 Natl House Ind Co Ltd 接着方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146641B (de) * 1961-03-22 1963-04-04 Paul Lechler Kunststoff Chemie Verfahren zum Aufkleben von Platten oder anderen Bauteilen auf einen Untergrund
BE668090A (fr) * 1964-08-11 1966-02-10
JPS5347506A (en) * 1976-10-06 1978-04-28 Minami Machine Method of horizontally jointing raw veneers
JPS5563258A (en) * 1978-11-08 1980-05-13 Nat Jutaku Kenzai Preparation of panel
JPS58185673A (ja) * 1982-04-23 1983-10-29 Natl House Ind Co Ltd 接着方法

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292813A2 (fr) * 1987-05-26 1988-11-30 REICH Spezialmaschinen GmbH Procédé et dispositif pour joindre des éléments latéraux aux parties frontales d'ouvrages en forme de plaque
EP0292813A3 (fr) * 1987-05-26 1990-07-18 REICH Spezialmaschinen GmbH Procédé et dispositif pour joindre des éléments latéraux aux parties frontales d'ouvrages en forme de plaque
WO2002096607A1 (fr) * 2001-05-31 2002-12-05 Hans Niedermayer Plaque comportant une face et moyens permettant de coller ladite face a la face d'une autre plaque
US7226517B2 (en) * 2004-01-30 2007-06-05 Paul Lane Method of surfacing a substrate
EP1992759A2 (fr) * 2007-05-14 2008-11-19 Fritz Egger GmbH & Co. Panneau de construction léger
EP1992759A3 (fr) * 2007-05-14 2010-03-03 Fritz Egger GmbH & Co. Panneau de construction léger
JP2015120324A (ja) * 2013-12-25 2015-07-02 Dic株式会社 積層体、木質板、化粧板、及び、積層体の製造方法
GB2579813A (en) * 2018-12-14 2020-07-08 Rivdal Developments Ltd Improvements in relating to the bonding of solid wood, mdf, particle board or such like
GB2579813B (en) * 2018-12-14 2022-02-02 Rivdal Developments Ltd A method of industrially bonding wood-based materials

Also Published As

Publication number Publication date
EP0253628A3 (fr) 1988-08-17

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Inventor name: ROTHERHAM, ALAN CHARLES