EP0167013B1 - A method of cutting round timber - Google Patents

A method of cutting round timber Download PDF

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Publication number
EP0167013B1
EP0167013B1 EP85107022A EP85107022A EP0167013B1 EP 0167013 B1 EP0167013 B1 EP 0167013B1 EP 85107022 A EP85107022 A EP 85107022A EP 85107022 A EP85107022 A EP 85107022A EP 0167013 B1 EP0167013 B1 EP 0167013B1
Authority
EP
European Patent Office
Prior art keywords
pieces
section
cutting
log
cuts
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.)
Expired - Lifetime
Application number
EP85107022A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0167013A3 (en
EP0167013A2 (en
Inventor
Olavi Jaakkola
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.)
Schauman Wood Oy
Original Assignee
Schauman Wood Oy
Wilh Schauman Oy 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 Schauman Wood Oy, Wilh Schauman Oy AB filed Critical Schauman Wood Oy
Priority to AT85107022T priority Critical patent/ATE52440T1/de
Publication of EP0167013A2 publication Critical patent/EP0167013A2/en
Publication of EP0167013A3 publication Critical patent/EP0167013A3/en
Application granted granted Critical
Publication of EP0167013B1 publication Critical patent/EP0167013B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing

Definitions

  • the present invention relates to a method for cutting a round log.
  • the most common machine for cutting round timber such as logs or similar is saw, such as frame saw, band saw, or circular saw.
  • milling cutters are used for cutting round timber into pieces alone or together with saw blades.
  • a feasible feature of using cutters is that the type of wood chips produced in milling cutters is, better than sawdust, suited for use as raw material in paper and pulp industry.
  • the most common final or intermediate products produced by known methods of cutting round timber are timber pieces of rectangular cross section, such as spars, boards and planks of various sorts.
  • Figures F, G, H, I, J, and K represent another method of producing oblique-sided timber pieces.
  • trapezoidal timber pieces 10 illustrated in Figure A have been made as shown in Figures C, D, and E. These timber pieces 10 have been assembled to for instance shelf boards illustrated in Figure B.
  • log 12 have been cut in a sawing-milling line into rectangular timber pieces 13, 14, 15 and 16.
  • pieces 15 and/or 16 Figure D
  • pieces 15 and 16 Figure D
  • parts 20 have been removed from pieces 15, 16 by sawing and/or planing as shown in Figure E.
  • FIG. F to K Another known method of making oblique-sided timber pieces is illustrated in Figures F to K.
  • the log is at first turned on a lathe to completely round piece 19, which is thereafter sawn 21 to two halves 22 and 23.
  • Said halves 22 and 23 are dried in a separate stage, after which each half 22, 23 are separately sawn and/or milled so that their cross sections become trapezoidal; i.e. two opposite sides 25 of the halves 22, 23 will be parallel, while two other opposite sides 26 will be oblique in respect with each other.
  • the invention has the task of placing the longitudinal cuts in the log such that with as little waste product as possible useable pieces are produced which are as approximately equal as possible to the cross-section of the log.
  • raw material log 40 is brought by means of conveyor 50 to a cutting stage in accordance with the invention.
  • Figure 2 shows the cross section of log 40, its base 41 a and top 41 b.
  • Log 40 is fed from behind and/or from the side onto the feeding conveyor 50, whose idler rollers are indicated with numbers 51 and 52.
  • cutting line in which the procedure in accordance with the invention has been implemented, which cutting line may comprise for instance cutting means shown in Figure 1, which cutting means comprise lateral levelling means 53 and 54, which may be combined with oblique cutting means and top and bottom levelling means 55, which also may be combined with oblique cutting means.
  • cutting means comprise lateral levelling means 53 and 54, which may be combined with oblique cutting means and top and bottom levelling means 55, which also may be combined with oblique cutting means.
  • This cutting and/or sawing produces rectangular timber pieces 42 and 43 and trapezoidal timber pieces 44 and 45.
  • Figures 4, 5, 6, and 7 illustrate some alternative log cutting patterns.
  • the cutting pattern determines the number of required cutting organs and milling cutters and the need of oblique cutting organs.
  • a plank or spar 49 is taken from the center part of the log, and two oblique-sided pieces 4 and 45 are separated from both broad sides of the spar 49.
  • two planks or boards 42 and 43 are taken from the center part of the log, and oblique-sided pieces 44 and 45 are separated from their broad sides.
  • two planks or spars 42 and 43 are taken from the center part of the log, and from their each side are taken oblique-sided pieces 44, 45, 47, 48 so that surface parts 46 consist only a very small portion of the whole cross section of the log.
  • the oblique cutting means included, yet arranged in such a way, that when cutting smaller logs a part of these organs may be out of operation.
  • the round cross-sectional area of the log can be used more efficiently compared with the situation where only pieces with rectangular cross section are produced. This fact is easy to perceive when comparing for instance cutting patterns of Figures C and 6 of the Application.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Ropes Or Cables (AREA)
  • Lubricants (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP85107022A 1984-07-05 1985-06-07 A method of cutting round timber Expired - Lifetime EP0167013B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85107022T ATE52440T1 (de) 1984-07-05 1985-06-07 Verfahren zum schneiden von rundholz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI842710A FI76726C (fi) 1984-07-05 1984-07-05 Foerfarande foer styckning av runt saogstockar.
FI842710 1984-07-05

Publications (3)

Publication Number Publication Date
EP0167013A2 EP0167013A2 (en) 1986-01-08
EP0167013A3 EP0167013A3 (en) 1987-09-09
EP0167013B1 true EP0167013B1 (en) 1990-05-09

Family

ID=8519355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107022A Expired - Lifetime EP0167013B1 (en) 1984-07-05 1985-06-07 A method of cutting round timber

Country Status (4)

Country Link
EP (1) EP0167013B1 (fi)
AT (1) ATE52440T1 (fi)
DE (1) DE3577518D1 (fi)
FI (1) FI76726C (fi)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294997A3 (en) * 1987-06-12 1990-01-31 Erling Jim Andersen Method and apparatus for sawing logs
DE58909326D1 (de) * 1989-03-23 1995-08-03 Berthold Fries Holzbalken und Verfahren zu dessen Herstellung.
SE511577C2 (sv) * 1997-03-19 1999-10-25 Aelvsbyhus Ab Förfarande för tillverkning av långsträckta föremål samt föremål tillverkat enligt förfarandet
SE9801911L (sv) * 1998-05-29 1999-05-31 Lars Hammarstroem Förfarande för sönderdelning av en stock samt virkesenhet
AT406131B (de) 1998-07-17 2000-02-25 Wolf Systembau Gmbh & Co Kg Verfahren und vorrichtung zum herstellen von acht- oder mehrseitigen kanthölzern
SE538283C2 (sv) 2014-08-08 2016-04-26 Stora Enso Oyj A gluelam structural member and a method of producing such a gluelam structural member

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE290153C (fi) *
US3903943A (en) * 1974-04-15 1975-09-09 Weyerhaeuser Co Log cutting and rejoining process
US4239069A (en) * 1979-08-10 1980-12-16 Zimmerman Edwin H Automatic cant production machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3552457A (en) * 1968-05-29 1971-01-05 Mac Millan Bloedel Ltd Log break-down method and apparatus
IT1116595B (it) * 1979-06-05 1986-02-10 Franciosi Giovanni Metodo e dispositivo per la segazione di tronchi dotati di naturale conicita'per ottenere il massimo rendimento in travi parallelepipede a sezione rettangolare con tolleranze d'uso

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE290153C (fi) *
US3903943A (en) * 1974-04-15 1975-09-09 Weyerhaeuser Co Log cutting and rejoining process
US4239069A (en) * 1979-08-10 1980-12-16 Zimmerman Edwin H Automatic cant production machine

Also Published As

Publication number Publication date
FI842710A (fi) 1986-01-06
FI842710A0 (fi) 1984-07-05
ATE52440T1 (de) 1990-05-15
DE3577518D1 (de) 1990-06-13
FI76726B (fi) 1988-08-31
EP0167013A3 (en) 1987-09-09
EP0167013A2 (en) 1986-01-08
FI76726C (fi) 1988-12-12

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