WO1999036235A1 - Method of manufacturing part units to end products of different kinds of wood - Google Patents

Method of manufacturing part units to end products of different kinds of wood Download PDF

Info

Publication number
WO1999036235A1
WO1999036235A1 PCT/SE1999/000055 SE9900055W WO9936235A1 WO 1999036235 A1 WO1999036235 A1 WO 1999036235A1 SE 9900055 W SE9900055 W SE 9900055W WO 9936235 A1 WO9936235 A1 WO 9936235A1
Authority
WO
WIPO (PCT)
Prior art keywords
timber
units
wood
order
moisture content
Prior art date
Application number
PCT/SE1999/000055
Other languages
French (fr)
Inventor
Anders Björk
Original Assignee
Green Gluing Scandinavia Ab
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 Green Gluing Scandinavia Ab filed Critical Green Gluing Scandinavia Ab
Priority to AU24451/99A priority Critical patent/AU2445199A/en
Publication of WO1999036235A1 publication Critical patent/WO1999036235A1/en

Links

Classifications

    • 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
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0026—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally
    • B27M3/0053—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally using glue
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board

Definitions

  • the present invention relates to a method in which, with the aid of several units, an end product can be produced that is rather complicated and in which a method using gluing has been utilized.
  • the object of the present invention is to provide a rational method for utilizing pure timber and thus achieve considerable savings in the manufacture of wooden products.
  • the starting materials are the following types of timber: spruce, pine, birch, beech, oak, larch and timber with equivalent properties.
  • a slim trunk with a top diameter of between 80 and 140 mm is selected. This trunk is placed in a water bath so that it acquires a moisture content between 20 and 40 %.
  • the water suitably has a temperature somewhere between 15° and 25°.
  • each part contains a core part having at least 8 annual rings. This method makes it unnecessary to remove the bark.
  • the desired end product is obtained when the individual timber units of desired dampness have been joined together to form different bodies.
  • These wooden sleepers are manufactured in exactly the same way as described above, namely tree trunks are placed in a water bath in order to acquire a certain degree of dampness, and are then processed to bars of substantially rectangular shape, provided with polyurethane glue or the like and joined together so that they form sleepers, after which the sleepers are subjected to pressure.
  • sleepers it is obvious that not every unit in the sleeper need be as long as the sleeper itself. The latter may consist of several parts arranged one after the other and very inexpensive sleepers can be produced in this way.
  • the unit it is extremely advantageous when producing a unit in accordance with the present method, for the unit to consist of heartwood and to have at least eight annual rings.

Abstract

The present invention relates to joining different wooden elements by means of wet gluing. In accordance with the invention this is performed by placing trunks of spruce, pine, birch, beech, oak and larch, said trunks usually having a top diameter of approximately 80-400 mm, in a water bath so that the desired moisture content is obtained, after which the trunks are sawn into pieces and joined with the aid of glue under pressure.

Description

METHOD OF MANUFACTURING PART UNITS TO END PRODUCTS OF DIFFERENT KINDS OF WOOD
Various wooden objects can be manufactured from a single unit but it is also feasible, and in certain cases advisable, to use several units and join them together in one way or another.
The present invention relates to a method in which, with the aid of several units, an end product can be produced that is rather complicated and in which a method using gluing has been utilized.
The object of the present invention is to provide a rational method for utilizing pure timber and thus achieve considerable savings in the manufacture of wooden products.
In the present case the starting materials are the following types of timber: spruce, pine, birch, beech, oak, larch and timber with equivalent properties. A slim trunk with a top diameter of between 80 and 140 mm is selected. This trunk is placed in a water bath so that it acquires a moisture content between 20 and 40 %. The water suitably has a temperature somewhere between 15° and 25°. When sufficient moisture has been absorbed by the timber it is cut into parts, generally in such a way that each part contains a core part having at least 8 annual rings. This method makes it unnecessary to remove the bark. The desired end product is obtained when the individual timber units of desired dampness have been joined together to form different bodies. All flat surfaces are provided with glue consisting of polyurethane glue or some other similar glue with the same properties. When the product is glued together it is compressed under a pressure of between 0.6 and 0.8 N/mm2. Finished products may then be surface-treated and possibly impregnated. Timber units from a warm bath can be used with great ingenuity for innumerable different products such as furniture, tables and generally for all kinds of furniture material as well as for wall material. The railway industry places high demands on rails that are laid, namely that they shall withstand a load of approximately 40 tons. This in turn places considerable demands on the track foundation and sleepers. It has therefore been found that sleepers made from wood h ave advantages over concrete sleepers. These wooden sleepers are manufactured in exactly the same way as described above, namely tree trunks are placed in a water bath in order to acquire a certain degree of dampness, and are then processed to bars of substantially rectangular shape, provided with polyurethane glue or the like and joined together so that they form sleepers, after which the sleepers are subjected to pressure. With regard to sleepers it is obvious that not every unit in the sleeper need be as long as the sleeper itself. The latter may consist of several parts arranged one after the other and very inexpensive sleepers can be produced in this way.
It is extremely advantageous when producing a unit in accordance with the present method, for the unit to consist of heartwood and to have at least eight annual rings.

Claims

C LAIM
1. A method of manufacturing part units to end products of various kinds, characterized in that the wood is selected from spruce, pine, birch, beech, oak, larch and timber with equivalent properties, the selected timber unit having a diameter at the top in the order of 80-140 mm, in that selected timber is placed in a tank for the purpose of acquiring a moisture content in the order of 20-40 %, in that the moisture-treated timber is cut in such a way that each unit contains flat surfaces and a cross section with a number of annual rings, in that the units are glued together with polyurethane glue or equivalent while having a moisture content in the order of 40 %, the units to be joined being subjected to a pressure in the order of 0.6-0.8 N/mm2, and in that when gluing is completed the moisture content is permitted to decrease to 14%.
PCT/SE1999/000055 1998-01-16 1999-01-17 Method of manufacturing part units to end products of different kinds of wood WO1999036235A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24451/99A AU2445199A (en) 1998-01-16 1999-01-17 Method of manufacturing part units to end products of different kinds of wood

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9800105-0 1998-01-16
SE9800105A SE9800105L (en) 1998-01-16 1998-01-16 Method for producing sub-assemblies for end products of different types of wood

Publications (1)

Publication Number Publication Date
WO1999036235A1 true WO1999036235A1 (en) 1999-07-22

Family

ID=20409884

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/000055 WO1999036235A1 (en) 1998-01-16 1999-01-17 Method of manufacturing part units to end products of different kinds of wood

Country Status (3)

Country Link
AU (1) AU2445199A (en)
SE (1) SE9800105L (en)
WO (1) WO1999036235A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002068164A1 (en) * 2001-02-27 2002-09-06 Canadian Forest Products Ltd. Composite wood product and method of manufacture
WO2010020829A1 (en) * 2005-01-20 2010-02-25 Riviere Jim Assembly of solid elements
EP3127669A1 (en) * 2015-08-04 2017-02-08 Binderholz International AG Method for manufacturing wooden components

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897581A (en) * 1973-03-27 1975-07-29 Sumitomo Bakelite Co Plywood veneer of edge-bonded wet wood pieces and method of making same
US3969558A (en) * 1972-07-18 1976-07-13 Dantani Plywood Co., Ltd. Veneer sheet of a plurality of thin flat sections of wood
DE2947611A1 (en) * 1979-11-26 1981-05-27 Kurt Ing.(grad.) 8625 Sonnefeld Feyler METHOD FOR PRODUCING BOARD SLATS FROM ROD
SE501131C2 (en) * 1992-11-04 1994-11-21 Martin Wiklund Methods of making disc shaped elements of end wood type, as well as plate and elements made therewith
EP0650811A1 (en) * 1993-10-30 1995-05-03 Holzbau Krämer GmbH Endless timber pole
US5593530A (en) * 1994-07-14 1997-01-14 Hashiguchi; Tetsuya Laminated lumber and method of manufacturing the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969558A (en) * 1972-07-18 1976-07-13 Dantani Plywood Co., Ltd. Veneer sheet of a plurality of thin flat sections of wood
US3897581A (en) * 1973-03-27 1975-07-29 Sumitomo Bakelite Co Plywood veneer of edge-bonded wet wood pieces and method of making same
DE2947611A1 (en) * 1979-11-26 1981-05-27 Kurt Ing.(grad.) 8625 Sonnefeld Feyler METHOD FOR PRODUCING BOARD SLATS FROM ROD
SE501131C2 (en) * 1992-11-04 1994-11-21 Martin Wiklund Methods of making disc shaped elements of end wood type, as well as plate and elements made therewith
EP0650811A1 (en) * 1993-10-30 1995-05-03 Holzbau Krämer GmbH Endless timber pole
US5593530A (en) * 1994-07-14 1997-01-14 Hashiguchi; Tetsuya Laminated lumber and method of manufacturing the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002068164A1 (en) * 2001-02-27 2002-09-06 Canadian Forest Products Ltd. Composite wood product and method of manufacture
WO2010020829A1 (en) * 2005-01-20 2010-02-25 Riviere Jim Assembly of solid elements
US8662120B2 (en) 2005-01-20 2014-03-04 Jim Riviere Complete assembling of massive elements
EP3127669A1 (en) * 2015-08-04 2017-02-08 Binderholz International AG Method for manufacturing wooden components

Also Published As

Publication number Publication date
SE9800105L (en) 1999-07-17
SE9800105D0 (en) 1998-01-16
AU2445199A (en) 1999-08-02

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