WO2006083175A1 - A method of machining fibre boards - Google Patents

A method of machining fibre boards Download PDF

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Publication number
WO2006083175A1
WO2006083175A1 PCT/NO2006/000045 NO2006000045W WO2006083175A1 WO 2006083175 A1 WO2006083175 A1 WO 2006083175A1 NO 2006000045 W NO2006000045 W NO 2006000045W WO 2006083175 A1 WO2006083175 A1 WO 2006083175A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibreboard
lateral edge
orientation determining
sections
board
Prior art date
Application number
PCT/NO2006/000045
Other languages
French (fr)
Inventor
Svein Herdal
Original Assignee
Fibo-Trespo As
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 Fibo-Trespo As filed Critical Fibo-Trespo As
Priority to US11/883,733 priority Critical patent/US20080282526A1/en
Priority to EP06716721A priority patent/EP1853411A1/en
Publication of WO2006083175A1 publication Critical patent/WO2006083175A1/en
Priority to NO20074340A priority patent/NO20074340L/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F1/00—Dovetailed work; Tenons; Making tongues or grooves; Groove- and- tongue jointed work; Finger- joints
    • B27F1/02—Making tongues or grooves, of indefinite length
    • 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
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • This invention regards a method of machining fibreboards . More particularly, it regards a method of machining fibreboards in which one section of the fibreboard is turned around after the board has been cut into at least two sections , for subsequent machining, e . g . milling of a tongue and groove along the longitudinal lateral edges of the board sections .
  • the method is particularly appropriate for the machining of panel boards that , when mounted; cover a surface in a room.
  • the board halves After cutting, the board halves are moved through a machine in which a groove and a tongue, respectively, are milled into at least two opposite lateral edges of each board half .
  • a fibreboard is often cut longitudinally, whereupon a first board half is first transported to a machine for milling of a tongue and groove, whereupon, following a lateral displacement , the second board half follows the first board half to the same machine .
  • the groove of e . g . the first board half will be on the side of the first board half that formed the outside edge of the original full board, while the tongue of the first board half will be on the side of the first board half that , prior to halving, was contiguous to the second board half .
  • the groove of the second board half will be on the side of the second board half that , prior to halving, was adjacent to the first board half , while the tongue of the second board half will be on the side of the second board half that formed the outer lateral edge of the original full fibreboard.
  • the obj ect of the invention is to remedy or reduce at least one of the drawbacks of prior art .
  • this problem of shrinkage is solved by allowing the fibreboards on e . g . a wall to contract in the same direction .
  • the concave side of a fibreboard section is mounted to the convex side of an adj acent fibreboard section .
  • these fibreboard sections constitute a fibreboard half .
  • the method means that the groove of each fibreboard section must be located on the side of the original fibreboard which formed the outside lateral edge, alternatively on the side of the one fibreboard section that was located adjacent to the second fibreboard section, and that the tongue of the fibreboard section must be on the opposite side .
  • the groove of one fibreboard section will be milled in a relatively dry area of the fibreboard section, and it will be coupled to a tongue milled in a relatively moist area of the other fibreboard section .
  • a first type of orientation determining j oining means is provided on a relatively dry lateral edge, while a second type of orientation determining j oining means is provided on a relatively moist lateral edge .
  • orientation determining joining means implies a joining means that prevents the fibreboard sections from being assembled in just any orientation relative each other .
  • the method is implemented quite simply by at least one of the fibreboard sections being turned around prior to being provided with orientation determining j oining means .
  • a typical orientation determining joining means is a tongue and a groove on opposite lateral edges .
  • Fig . 1 is a principle drawing of a mounting of fibreboard halves produced according to prior art , where the curving due to dehydration is greatly exaggerated
  • Fig . 2 is a principle drawing of a mounting of fibreboard halves produced according to the invention, where the curving due to dehydration is greatly exaggerated;
  • Fig . 3 is a principle drawing on a slightly smaller scale, showing a fibreboard being cut into two fibreboard halves ;
  • Fig. 4 is a principle drawing showing the fibreboard of figure 3 after cutting, where a first fibreboard half is being transported to subsequent machining, while a second fibreboard half is being rotated through 180 degrees in the plane of the board;
  • Fig . 5 shows the second fibreboard half , after having been rotated through 180 degrees , as it follows the first fibreboard half to the subsequent machining;
  • Fig . 6 is an end view of the fibreboard halves , on a larger scale .
  • reference number 1 denotes a clean-cut fibreboard with a middle section 2 , a first longitudinal lateral edge 4 , a second longitudinal lateral edge 6 , a first transverse edge 8 and a second transverse edge 10 , see figure 3.
  • the moisture content of the fibreboard 1 is higher in the middle section 2 than at the outer edges 4 , 6 , 8 and 10.
  • the first fibreboard half comprises the first longitudinal lateral edge 4 and an opposite third longitudinal lateral edge 18.
  • the second fibreboard half 14 comprises the second longitudinal lateral edge 6 and an opposite fourth longitudinal lateral edge 20.
  • the third longitudinal lateral edge 18 and the fourth longitudinal lateral edge 20 were created when the fibreboard 1 was cut through the middle section 2 of the fibreboard 1.
  • fibreboard halves 12 and 14 will contract more along their respective third and fourth longitudinal lateral edges 18 , 20 than along their respective first and second longitudinal lateral edges 4 , 6.
  • the first fibreboard half 12 is moved longitudinally to a following machine in which the first fibreboard half 12 receives a groove 22 in its relatively moist third longitudinal lateral edge 18 and a tongue 24 in its relatively dry first longitudinal lateral edge 4 , in a manner that is known per se.
  • the tongue 24 and groove 22 constitute a first type of orientation determining joining means and a second type of orientation determining j oining means , respectively.
  • the second fibreboard half 14 is then rotated through 180 degrees in the plane of the board, and so is turned around before following the first fibreboard half 12 to the machine (not shown) .
  • the second fibreboard half 14 receives a groove 22 in its relatively moist fourth lateral edge 20 and a tongue 24 in its relatively dry second lateral edge 6 , in the same way as the first fibreboard half 12.
  • the relatively moist third longitudinal lateral edge 18 of the first fibreboard half 12 is a complementary match to the relatively dry second longitudinal lateral edge 6 of the second fibreboard half 14 , which edge is provided with a tongue 24.
  • the relatively moist fourth longitudinal lateral edge 20 of the second fibreboard half is a complementary match to the relatively dry first longitudinal lateral edge 4 of another first fibreboard half 12 etc .
  • the fibreboard halves 12 , 14 When the moisture content of the fibreboard halves 12 , 14 evens out after mounting, the fibreboard halves 12 , 14 will draw in the same direction, thereby preventing cracks from occurring between the respective longitudinal lateral edges 4 , 6 , 18 and 20.

Abstract

A method of machining a fibreboard (1), where the fibreboard (1), which may have a non-uniform content of moisture, is cut into at least two fibreboard sections (12, 14), and where the 5 fibreboard sections (12, 14) are then provided with complementary matching orientation determining joining means along at least two of their lateral edges (4, 6, 8, 10, 18, 20), and where a first type of orientation determining joining means (22, 24) is provided on a relatively dry o lateral edge (4, 6), while a second type of orientation determining joining means (22, 24) is provided on a relatively moist lateral edge (18, 20).

Description

A METHOD OF MACHINING FIBRE BOARDS
This invention regards a method of machining fibreboards . More particularly, it regards a method of machining fibreboards in which one section of the fibreboard is turned around after the board has been cut into at least two sections , for subsequent machining, e . g . milling of a tongue and groove along the longitudinal lateral edges of the board sections . The method is particularly appropriate for the machining of panel boards that , when mounted; cover a surface in a room.
When machining fibreboards , which are often decorated on one side, it is common, for production related reasons , to produce relatively large boards that are typically cut into two equally sized board halves in the course of the subsequent machining .
After cutting, the board halves are moved through a machine in which a groove and a tongue, respectively, are milled into at least two opposite lateral edges of each board half . In prior art , a fibreboard is often cut longitudinally, whereupon a first board half is first transported to a machine for milling of a tongue and groove, whereupon, following a lateral displacement , the second board half follows the first board half to the same machine .
With this method of machining, the groove of e . g . the first board half will be on the side of the first board half that formed the outside edge of the original full board, while the tongue of the first board half will be on the side of the first board half that , prior to halving, was contiguous to the second board half .
Likewise, the groove of the second board half will be on the side of the second board half that , prior to halving, was adjacent to the first board half , while the tongue of the second board half will be on the side of the second board half that formed the outer lateral edge of the original full fibreboard.
Thus when mounted, after joining the tongue and groove, the fibreboards are assembled as they were in the original full fibreboard.
It has proven difficult to achieve a uniform content of moisture in a fibreboard. Typically the moisture content is higher in the middle section of a fibreboard than along its lateral edges . A certain equalizing of this moisture content must be expected after the fibreboard has been mounted. A reduction in moisture causes shrinkage/contraction, and it is known for fibreboard halves to pull apart slightly as they dry out . People in the trade know this phenomenon as "curving" . The problem is made worse by board halves produced according to prior art drawing in opposite directions after being mounted. Exaggerating a little, one may say that the fibreboard halves form arches with paired concave and convex, respectively, sides facing each other .
The obj ect of the invention is to remedy or reduce at least one of the drawbacks of prior art .
The obj ect is achieved in accordance with the invention, by the features specified in the description below and in the following Claims .
According to the invention this problem of shrinkage is solved by allowing the fibreboards on e . g . a wall to contract in the same direction . Thus the concave side of a fibreboard section is mounted to the convex side of an adj acent fibreboard section . Typically these fibreboard sections constitute a fibreboard half .
The method means that the groove of each fibreboard section must be located on the side of the original fibreboard which formed the outside lateral edge, alternatively on the side of the one fibreboard section that was located adjacent to the second fibreboard section, and that the tongue of the fibreboard section must be on the opposite side .
By so doing the groove of one fibreboard section will be milled in a relatively dry area of the fibreboard section, and it will be coupled to a tongue milled in a relatively moist area of the other fibreboard section .
When the fibreboards dry they will draw in the same direction, thus achieving approximately the same curvature . Thus the fibreboard sections will pull apart only slightly.
When machining a fibreboard where the fibreboard, which may have a non-uniform moisture content , is cut into at least two fibreboard sections , and where the fibreboard is then provided with complementary orientation determining means of j oining along at least two of its lateral edges , a first type of orientation determining j oining means is provided on a relatively dry lateral edge, while a second type of orientation determining j oining means is provided on a relatively moist lateral edge .
The term orientation determining joining means implies a joining means that prevents the fibreboard sections from being assembled in just any orientation relative each other .
The method is implemented quite simply by at least one of the fibreboard sections being turned around prior to being provided with orientation determining j oining means .
A typical orientation determining joining means is a tongue and a groove on opposite lateral edges .
In what follows is described a non-limiting exemplary embodiment of a preferred embodiment illustrated in the accompanying drawings , in which:
Fig . 1 is a principle drawing of a mounting of fibreboard halves produced according to prior art , where the curving due to dehydration is greatly exaggerated; Fig . 2 is a principle drawing of a mounting of fibreboard halves produced according to the invention, where the curving due to dehydration is greatly exaggerated;
Fig . 3 is a principle drawing on a slightly smaller scale, showing a fibreboard being cut into two fibreboard halves ;
Fig. 4 is a principle drawing showing the fibreboard of figure 3 after cutting, where a first fibreboard half is being transported to subsequent machining, while a second fibreboard half is being rotated through 180 degrees in the plane of the board;
Fig . 5 shows the second fibreboard half , after having been rotated through 180 degrees , as it follows the first fibreboard half to the subsequent machining; and
Fig . 6 is an end view of the fibreboard halves , on a larger scale .
In the drawings , reference number 1 denotes a clean-cut fibreboard with a middle section 2 , a first longitudinal lateral edge 4 , a second longitudinal lateral edge 6 , a first transverse edge 8 and a second transverse edge 10 , see figure 3.
The moisture content of the fibreboard 1 is higher in the middle section 2 than at the outer edges 4 , 6 , 8 and 10. After the fibreboard has been cut longitudinally into a first fibreboard half 12 and a second fibreboard half 14 by e . g . a saw blade 16 , the first fibreboard half comprises the first longitudinal lateral edge 4 and an opposite third longitudinal lateral edge 18. The second fibreboard half 14 comprises the second longitudinal lateral edge 6 and an opposite fourth longitudinal lateral edge 20. The third longitudinal lateral edge 18 and the fourth longitudinal lateral edge 20 were created when the fibreboard 1 was cut through the middle section 2 of the fibreboard 1.
It is to be expected that the fibreboard halves 12 and 14 will contract more along their respective third and fourth longitudinal lateral edges 18 , 20 than along their respective first and second longitudinal lateral edges 4 , 6.
After the splitting, the first fibreboard half 12 is moved longitudinally to a following machine in which the first fibreboard half 12 receives a groove 22 in its relatively moist third longitudinal lateral edge 18 and a tongue 24 in its relatively dry first longitudinal lateral edge 4 , in a manner that is known per se.
The tongue 24 and groove 22 constitute a first type of orientation determining joining means and a second type of orientation determining j oining means , respectively.
The second fibreboard half 14 is then rotated through 180 degrees in the plane of the board, and so is turned around before following the first fibreboard half 12 to the machine (not shown) .
The second fibreboard half 14 receives a groove 22 in its relatively moist fourth lateral edge 20 and a tongue 24 in its relatively dry second lateral edge 6 , in the same way as the first fibreboard half 12.
Thus upon mounting, see Figure 2 , the relatively moist third longitudinal lateral edge 18 of the first fibreboard half 12 , with the groove 22 , is a complementary match to the relatively dry second longitudinal lateral edge 6 of the second fibreboard half 14 , which edge is provided with a tongue 24. Likewise , the relatively moist fourth longitudinal lateral edge 20 of the second fibreboard half is a complementary match to the relatively dry first longitudinal lateral edge 4 of another first fibreboard half 12 etc .
When the moisture content of the fibreboard halves 12 , 14 evens out after mounting, the fibreboard halves 12 , 14 will draw in the same direction, thereby preventing cracks from occurring between the respective longitudinal lateral edges 4 , 6 , 18 and 20.

Claims

C l a i m s
1. A method of machining a fibreboard ( 1) , where the fibreboard (1) , which may have a non-uniform content of moisture, is split into at least two fibreboard 5 sections ( 12 , 14 ) , and where the fibreboard sections
(12 , 14) are then provided with complementary matching orientation determining joining means along at least two of their lateral edges (4 , 6 , 8 , 10 , 18 , 20) , c h a r a c t e r i z e d i n that a first type of o orientation determining joining means (22 , 24 ) is provided on a relatively dry lateral edge (4 , 6) , while a second type of orientation determining j oining means (22 , 24 ) is provided on a relatively moist lateral edge ( 18 , 20 ) .
s 2. A method in accordance with Claim 1 , c h a r a c t e r i z e d i n that at least one of the fibreboard sections ( 12 , 14) is turned around prior to being provided with orientation determining j oining means (22 , 24) .
o 3. A method in accordance with Claim 1 , c h a r a c t e r i z e d i n that the orientation determining joining means are a tongue (24) and a groove (22 ) .
PCT/NO2006/000045 2005-02-02 2006-02-02 A method of machining fibre boards WO2006083175A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US11/883,733 US20080282526A1 (en) 2005-02-02 2006-02-02 Method of Machining Fibre Board
EP06716721A EP1853411A1 (en) 2005-02-02 2006-02-02 A method of machining fibre boards
NO20074340A NO20074340L (en) 2005-02-02 2007-08-24 Process for processing fibreboard

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20050565A NO20050565D0 (en) 2005-02-02 2005-02-02 Process for processing fibreboard
NO20050565 2005-02-02

Publications (1)

Publication Number Publication Date
WO2006083175A1 true WO2006083175A1 (en) 2006-08-10

Family

ID=35220603

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000045 WO2006083175A1 (en) 2005-02-02 2006-02-02 A method of machining fibre boards

Country Status (4)

Country Link
US (1) US20080282526A1 (en)
EP (1) EP1853411A1 (en)
NO (1) NO20050565D0 (en)
WO (1) WO2006083175A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004379A1 (en) * 1989-09-12 1991-04-04 Träform Ab An individual stud for constructing a frame, the vertical and horizontal studs having the same cross section
US20010047702A1 (en) 2000-04-18 2001-12-06 Detlef Tychsen Process for cutting out panels or the like
WO2003074814A1 (en) * 2002-03-07 2003-09-12 Fritz Egger Gmbh & Co. Panels provided with a friction-based fixing

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5853037A (en) * 1995-07-06 1998-12-29 Moser; Thomas F. Rectilinear cross-sectional beam furniture, furniture design and furniture production
CA2299129C (en) * 1999-02-26 2008-04-22 Sir Walter Lindal Waterproof joints between timbers
US20020160147A1 (en) * 2001-02-27 2002-10-31 Suezone Chow Composite wood product and method of manufacture
US8028486B2 (en) * 2001-07-27 2011-10-04 Valinge Innovation Ab Floor panel with sealing means
CA2371152A1 (en) * 2002-02-06 2003-08-06 Guildo Deschenes Panels made of wood pieces edge-fitted one into another

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991004379A1 (en) * 1989-09-12 1991-04-04 Träform Ab An individual stud for constructing a frame, the vertical and horizontal studs having the same cross section
US20010047702A1 (en) 2000-04-18 2001-12-06 Detlef Tychsen Process for cutting out panels or the like
WO2003074814A1 (en) * 2002-03-07 2003-09-12 Fritz Egger Gmbh & Co. Panels provided with a friction-based fixing

Also Published As

Publication number Publication date
NO20050565D0 (en) 2005-02-02
US20080282526A1 (en) 2008-11-20
EP1853411A1 (en) 2007-11-14

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