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WO1998030370A1 - Procede de fabrication d'une planche en bois et la planche en soi - Google Patents

Procede de fabrication d'une planche en bois et la planche en soi Download PDF

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Publication number
WO1998030370A1
WO1998030370A1 PCT/CA1997/001000 CA9701000W WO9830370A1 WO 1998030370 A1 WO1998030370 A1 WO 1998030370A1 CA 9701000 W CA9701000 W CA 9701000W WO 9830370 A1 WO9830370 A1 WO 9830370A1
Authority
WO
WIPO (PCT)
Prior art keywords
wood
pieces
wood board
board
edges
Prior art date
Application number
PCT/CA1997/001000
Other languages
English (en)
Inventor
Raoul Grenier
Original Assignee
Cfl Structure Inc.
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 CA002194793A external-priority patent/CA2194793A1/fr
Application filed by Cfl Structure Inc. filed Critical Cfl Structure Inc.
Priority to AU54740/98A priority Critical patent/AU5474098A/en
Publication of WO1998030370A1 publication Critical patent/WO1998030370A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/04—Sorting according to size
    • B07C5/12—Sorting according to size characterised by the application to particular articles, not otherwise provided for
    • B07C5/14—Sorting timber or logs, e.g. tree trunks, beams, planks or the like
    • 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

Definitions

  • the present invention relates generally to the art of wood. More particularly, it concerns a process for making a wood board from coniferous trees and the wood board produced thereby.
  • Coniferous trees such as black spruce, white spruce, red spruce, grey pine, balsam fir and larch, because of their small size, are traditionally known to produce low grade quality lumber products such as wood chips or 1"X3", 1"X4" and 1"X6" boards.
  • Uses of those coniferous trees for structural purposes are very limited because of their inherent weakness.
  • the demand for those low-grade quality products is not as high as the demand for high-grade quality and as can be easily understood, the latter is a lot more profitable for producers. Therefore, there is presently a need for a process that will permit new, interesting and profitable uses for those coniferous trees.
  • An object of the present invention is to propose a process for making a wood board that satisfies the above-mentioned needs. More particularly, an object of the present invention is to propose a process for making a wood board from coniferous trees, the board produced thereby showing excellent mechanical characteristics .
  • Another object of the present invention is to provide a process for making a high strength structural wood board from coniferous trees which are traditionally considered as nonstructural wood.
  • the present invention relates to a process for making a wood board, the process comprising the steps of: a) providing elongated pieces of wood each from a coniferous tree and each having a rectangular cross section; b) detecting an average fibre density of each of the pieces of wood; c) selecting among the pieces of wood those having an average fibre density at least equal to a predetermined fiber density which is preferably equal to 0,420 g/cm 3 ; d) planing off edges of the pieces of wood selected in step c) ; and e) bonding side by side the pieces of wood planed off in step d) by means of their edges to form the wood board.
  • the pieces of wood selected in step c) are joined end to end to form a plurality of lamellae of wood and in step e) those lamellae are bonded side by side to form the wood board.
  • the coniferous tree is preferably selected from among black spruce, white spruce, red spruce, grey pine, balsam fir and larch. Most preferably, it is black spruce.
  • the above process comprises after step c) , the additional step of removing any defect present in each of the pieces of wood selected in step c) .
  • the present invention also relates to a wood board obtained by the process described above.
  • the present invention provides new interesting and profitable uses for coniferous trees traditionally known as nonstructural material.
  • the present invention also allows the quantity of wood required for any construction to be reduced without affecting the strength of the construction.
  • Figure 1 is a perspective view of a wood board according to a preferred embodiment of the present invention.
  • Figures 2a) to 2g) are each a perspective view of a wood board according respectively to another preferred embodiment of the present invention showing only an end portion of the board.
  • a wood board (10) according to a preferred embodiment of the present invention comprises a plurality of lamellae of wood (12a and 12b) edge joined together.
  • each of the lamellae (12) preferably consist of a single pieces of wood (14) as for lamellae (12a) or consist of a plurality of pieces of wood (14), joined end to end in order to obtain a desired length for each lamella, as for lamellae (12b) .
  • the thickness (t) of a wood board (10) according to the present invention preferably varies approximately between 1.25 to 3.00 inches, the width (w) preferably varies between 1.50 to 96.00 inches and the length (1) preferably vary between 48 to 720 inches.
  • a wood board according to the present invention may have other dimensions than the ones above without departing from the scope of the present invention.
  • Each lamella (12a, 12b) preferably has a thickness comprised between 1.25 to 3.00 inches, a width varying from 0.5 to 4.00 inches and a length varying from 48 to 720 inches.
  • each piece of wood (14) preferably varies from 8 to 96 inches.
  • Each piece of wood (14) comes from a coniferous tree and has been specifically selected in order to make a wood board of superior quality.
  • This board shows uniform quality throughout and may be used for structural purposes. More particularly, only the pieces of wood (14) having at least a predetermined average fibre density are selected and any defect such as knots, blazes, blights, cracks, flaws or deviation present in each of the pieces of wood (14) selected have preferably been removed.
  • Each piece of wood (14) comes from a coniferous tree which is preferably selected from among black spruce, white spruce, red spruce, grey pine, balsam fir and larch. Most preferably, the coniferous tree is the black spruce.
  • the average fiber density of each of the pieces selected is at least equal to 0.420 g/cm3. It has been discovered that among the pieces of wood coming from coniferous trees, the ones that show the best mechanical properties are those coming from the top of the tree or from stunted trees having a very slow growing rate. Those small trees may reach 120 years, thereby providing very close and dense fibers .
  • the lamellae (12) are joined edge to edge preferably by means of glue.
  • the glue used is preferably a structural wood glue known in the art and may be selected from among pure resorcinol and phenol -resorcinol- formaldehyde (PRF) or it may be a nonstructural wood glue selected from among polyvinyl acetate (PVA) , urea melamine (UM) or urea formaldehyde.
  • edges (16) of the lamellae (12) may be plane, as shown in figure 1 or they may be profiled as shown in figures 2a) to 2g) .
  • the profile is preferably selected from among a T-shaped profile as in figure 2a) , an obliquely-shaped profile as in figure 2b) , a squarely-shaped profile as in figure 2c) , a triangularly-shaped profile as in figure 2d) , a circularly- shaped profile as in figure 2e) , a step-shaped profile as in figure 2f) and a finger-shaped profile as in figure 2g) .
  • the lamellae (12) are formed from a plurality of pieces of wood (14) joined end to end, those pieces (14) are preferably finger-jointed by means of glue as shown in figure 1. Finger jointing is already known in prior art and does not require further explanation.
  • the process for making a wood board (10) as described above comprises the steps of : a) providing elongated pieces of wood (14) each from a coniferous tree and each having a rectangular cross section; b) detecting an average fiber density of each of the pieces of wood (14) ; c) selecting among the pieces of wood (14) those having an average fiber density at least equal to a predetermined fiber density; d) planing off edges of the pieces of wood .(14) selected in step c) ; and e) bonding side by side the pieces of wood (14) planed off in step d) by means of their edges (16) to form the wood board.
  • step e) the pieces of wood (14) are preferably edge- glued together by using an appropriate wood glue as described hereinbefore .
  • any piece of wood (14) selected in step c) is not long enough, for example if its length is less than 4 feet, the process comprises, prior to step d) , an additional step of jointing end to end said pieces of wood (14) to form a plurality of lamellae of wood (12) and in step e) those lamellae (12) are bonded side by side to form the wood board (10) .
  • the jointing is preferably made with a finger-joint using an appropriate wood glue.
  • the predetermined fiber density is approximately 0,420 g/cm 3 .
  • the process comprises, after step c) , the additional step of removing any defect present in each of the pieces of wood (14) selected in step c) .
  • the selection of the appropriate pieces of wood (14) is obtained by means of an electronic system which can first detect the fiber density at different locations along each piece of wood (14) passing through the system and then calculate the average fiber density of each of said pieces of wood (14) .
  • the electronic system is adapted to detect any defect present in each of the pieces of wood (14) and to remove those defects therefrom.
  • the process may comprise, prior to step d) of planing off, a step of profiling edges (16) of the pieces of wood (14) as described hereinbefore and as shown in figures 2a) to 2g) .
  • the process preferably comprises, after step e) of bonding side by side the pieces of wood (14) , an additional step of taking off sides of the wood board.
  • sequence of steps for making a wood board (10) according to a preferred embodiment of the invention from the reception of the raw material to the final product may be the following:
  • a wood board according to the present invention shows surprisingly improved mechanical properties. If each of the pieces of wood is selected such that its average fibre density is at least equal to 0,420 g/cm 3 , the wood board produced therefrom according to the present invention may compete with any traditional structural lumber products.
  • the following table I shows the mechanical properties of a wood board EGB(edge glued board) according to the present invention which has been tested in laboratory and the mechanical properties of conventional and engineered lumber product of the same size.
  • the EGB mentioned therein comprises a plurality of edge glued pieces of wood, each free from any defect and having an average fiber density at least equal to 0,420 g/cm 3 .
  • a wood board according to the present invention may have many different uses in a framework.
  • it may be used as a frame wall, as a composing element of a truss, as a composing element of a floor beam, as a composing element of a laminated beam or as a joist.
  • the raw material used in the making of a board according to the present invention comes from coniferous tree and most preferably from black spruce which are traditionally used for the production of wood chips or low grade quality boards, this invention will provide a new interesting market for these trees.

Landscapes

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

Abstract

Le procédé de fabrication de planches en bois (10) décrit comprend les étapes consistant à: a) fournir des pièces allongées de bois (12), dont chacune provient d'un conifère et chacune possède une section rectangulaire; b) détecter une densité moyenne de fibre pour chacune des pièces de bois; c) sélectionner parmi les pièces de bois celles possédant une densité moyenne de fibre au moins égale à une densité de fibre prédéterminée; d) raboter les bords des pièces de bois sélectionnées dans l'étape c); et e) fixer côte à côte les pièces de bois rabotées dans l'étape d) au moyen de leurs bords afin de former une planche en bois. Ladite planche en bois offre des caractéristiques mécaniques excellentes. L'avantage que présente l'invention tient au procédé de fabrication de produits très résistants de bois débité provenant de conifères et considérés normalement comme du bois non porteur.
PCT/CA1997/001000 1997-01-09 1997-12-19 Procede de fabrication d'une planche en bois et la planche en soi WO1998030370A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU54740/98A AU5474098A (en) 1997-01-09 1997-12-19 A process for making a wood board and the wood board

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA002194793A CA2194793A1 (fr) 1997-01-09 1997-01-09 Bois panneaute a haute resistance
CA2,194,793 1997-01-09
CA2,215,890 1997-10-02
CA 2215890 CA2215890C (fr) 1997-01-09 1997-10-02 Procede pour la fabrication de pieces de bois de charpente et pieces ainsi produites

Publications (1)

Publication Number Publication Date
WO1998030370A1 true WO1998030370A1 (fr) 1998-07-16

Family

ID=25678972

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1997/001000 WO1998030370A1 (fr) 1997-01-09 1997-12-19 Procede de fabrication d'une planche en bois et la planche en soi

Country Status (3)

Country Link
AU (1) AU5474098A (fr)
CA (1) CA2215890C (fr)
WO (1) WO1998030370A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10024084C1 (de) * 2000-05-17 2001-11-15 Hans Schneider Holzplatte aus einer Vielzahl von Holzelementen und Verfahren zu deren Herstellung
EP1329266A1 (fr) * 2002-06-04 2003-07-23 Franz Binder Ges. mbH Holzindustrie Installation de classification machinale de planches ou de poutres
EP1360999A1 (fr) * 2002-06-04 2003-11-12 Franz Binder Ges. mbH Holzindustrie Installation de tri de planches ou poutres
WO2009008791A1 (fr) * 2007-07-09 2009-01-15 Nyland Design Ab Procédé de fabrication de panneaux stratifiés à bords collés, et panneaux stratifiés à bords collés fabriqués selon ce procédé
RU2436668C2 (ru) * 2007-07-09 2011-12-20 Ска Форест Продактс Аб Устройство и способ изготовления ламинированных панелей со склеенными боковыми поверхностями и ламинированные панели со склеенными боковыми поверхностями, изготовленные упомянутым способом
CN109129799A (zh) * 2018-11-01 2019-01-04 福建森源木作有限公司 一种实木书柜玻璃边框的开料方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060011266A1 (en) * 2004-07-13 2006-01-19 Holzhey Michael G Variable dimension engineered timber system
AU2020295065A1 (en) 2019-06-18 2022-02-17 Timberworks Industrial Group Pty Ltd Engineered timber panel for structural use and method of formation thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029256A2 (fr) * 1979-11-26 1981-05-27 Kurt Feyler Procédé pour la fabrication de segments de planche à partir de bois rond
WO1990011488A1 (fr) * 1989-03-29 1990-10-04 Visionsmart Inc. Procede et systeme de classement de bois debites en temps reel
US5034259A (en) * 1988-06-23 1991-07-23 The Weyerhaeuser Company Process for re-manufacturing wood board and the product produced thereby
EP0692372A1 (fr) * 1994-07-14 1996-01-17 Tetsuya Hashiguchi Stratifié en bois et procédé de sa fabrication

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029256A2 (fr) * 1979-11-26 1981-05-27 Kurt Feyler Procédé pour la fabrication de segments de planche à partir de bois rond
US5034259A (en) * 1988-06-23 1991-07-23 The Weyerhaeuser Company Process for re-manufacturing wood board and the product produced thereby
WO1990011488A1 (fr) * 1989-03-29 1990-10-04 Visionsmart Inc. Procede et systeme de classement de bois debites en temps reel
EP0692372A1 (fr) * 1994-07-14 1996-01-17 Tetsuya Hashiguchi Stratifié en bois et procédé de sa fabrication

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10024084C1 (de) * 2000-05-17 2001-11-15 Hans Schneider Holzplatte aus einer Vielzahl von Holzelementen und Verfahren zu deren Herstellung
EP1329266A1 (fr) * 2002-06-04 2003-07-23 Franz Binder Ges. mbH Holzindustrie Installation de classification machinale de planches ou de poutres
EP1360999A1 (fr) * 2002-06-04 2003-11-12 Franz Binder Ges. mbH Holzindustrie Installation de tri de planches ou poutres
CZ298053B6 (cs) * 2002-06-04 2007-06-06 Franz Binder Ges. Mbh Holzindustrie Zarízení pro trídení prken nebo trámu
CZ298054B6 (cs) * 2002-06-04 2007-06-06 Franz Binder Ges. Mbh Holzindustrie Zarízení pro strojní klasifikaci prken nebo trámu
WO2009008791A1 (fr) * 2007-07-09 2009-01-15 Nyland Design Ab Procédé de fabrication de panneaux stratifiés à bords collés, et panneaux stratifiés à bords collés fabriqués selon ce procédé
RU2436668C2 (ru) * 2007-07-09 2011-12-20 Ска Форест Продактс Аб Устройство и способ изготовления ламинированных панелей со склеенными боковыми поверхностями и ламинированные панели со склеенными боковыми поверхностями, изготовленные упомянутым способом
US8365781B2 (en) 2007-07-09 2013-02-05 Sca Forest Products Ab Method of manufacturing edge glued laminated panels and edge glued laminated panels manufactured according to said method
CN109129799A (zh) * 2018-11-01 2019-01-04 福建森源木作有限公司 一种实木书柜玻璃边框的开料方法

Also Published As

Publication number Publication date
AU5474098A (en) 1998-08-03
CA2215890A1 (fr) 1998-07-09
CA2215890C (fr) 1999-02-23

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