EP1115540B1 - A method for dividing a log and a wood unit - Google Patents

A method for dividing a log and a wood unit Download PDF

Info

Publication number
EP1115540B1
EP1115540B1 EP99930038A EP99930038A EP1115540B1 EP 1115540 B1 EP1115540 B1 EP 1115540B1 EP 99930038 A EP99930038 A EP 99930038A EP 99930038 A EP99930038 A EP 99930038A EP 1115540 B1 EP1115540 B1 EP 1115540B1
Authority
EP
European Patent Office
Prior art keywords
log
cuts
wood
cut
centre
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
EP99930038A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1115540A1 (en
Inventor
Lars Hammarström
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.)
Holmen AB
Original Assignee
Holmen 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 Holmen AB filed Critical Holmen AB
Publication of EP1115540A1 publication Critical patent/EP1115540A1/en
Application granted granted Critical
Publication of EP1115540B1 publication Critical patent/EP1115540B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B27B1/005—Methods for subdividing trunks or logs essentially involving sawing including the step of dividing the log into sector-shaped segments
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/14—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with substantially solid, i.e. unapertured, web

Definitions

  • the present invention relates to a method for dividing a log.
  • Such methods aim at obtaining a wood piece from a log which as such has good wood properties or may be assembled to wood units having such properties, and which by that stipulates a higher price.
  • "Log” also comprises the case of a log already round-reduced before carrying out the method.
  • Wood pieces having such properties aimed at may be called "industrial wood” and are primarily characterized by having at least several of the surfaces thereof provided with substantially standing annual rings.
  • the object of the present invention is to provide a method of the type defined in the introduction, in which the disadvantages just mentioned of such methods already known are reduced to a large extent.
  • This method may be carried out by means of a conventional simple saw mill equipment, and this means that a main part of the volume of the log may result in so called “cross-sawn industrial wood” by the fact that said third cuts are applied substantially perpendicularly to the first and second cuts.
  • Another important advantage of this method is that "cross-sawn industrial wood” is a defined article, which facilitates quality certification of the products produced by this wood article.
  • two cuts are applied on each side of the centre axis of the log for forming a centre wood piece resulting from second cuts and restricted by these cuts.
  • a wood piece will have substantially standing annual rings of at least the two surfaces resulting from said second cuts, i.e. is to be considered as industrial wood.
  • the first wood pieces receive substantially standing annual rings for the surfaces resulting from the third cut, which is to be compared with a conventional dividing of a log, in which only the very centre deal receives surfaces having substantially standing annual rings.
  • a third second cut is applied along a plane including the centre axis of the log. This is advantageous in the case of larger log dimensions, since an adaptation of the wood output to the log dimension takes place in this way, and it is at large log dimensions well be possible to apply even more than three second cuts for obtaining a higher number of centre wood pieces.
  • the centre wood piece or pieces resulting from the application of the second cuts are cut by applying cuts being substantially perpendicular to the second cuts on each side of the centre axis for removing surface-near material and obtaining at least one centre wood piece having a substantially rectangular cross-section.
  • the centre wood piece or the centre wood pieces gets in this way a pleasant appearance.
  • two cuts are applied on the centre wood piece substantially perpendicularly to said second cuts on each side of the centre axis and comparatively close thereto for removing the marrow streak of the log while obtaining part centre wood pieces located on each side thereof.
  • Such part centre wood pieces form high quality cross-sawn industrial wood having substantially standing annual rings for at least three surfaces.
  • step b) two third cuts are applied on each side of the centre axis of the log for forming a second wood piece having a substantially rectangular cross-section with the sides of the cross-section rectangle formed by the two third cuts, a part of one first cut surface and a part of one second cut.
  • a second wood piece is also to be considered as a high quality cross-sawn industrial wood having substantially standing annual rings for at least two sides thereof.
  • Such second wood pieces will of course be obtained on each side of said second cuts, i.e. two for each log.
  • said sub-surface and a surface of each said first wood piece emanating from a second cut are used as guide surfaces for material removing machining of the respective first wood piece. It will by this be very easy to machine the first wood piece further for refining it, so that for example this machining is carried out by removing material in the longitudinal direction of the log along a surface extending in the transversal direction substantially perpendicularly to said guide surfaces on the opposite side of the first wood piece with respect to the surface generated by the respective third cut, which constitutes a further preferred embodiment of the invention. Wood pieces having two surfaces suited for glueing to other corresponding such wood pieces for forming a wood unit according to the appended independent claim having a very high shape stability and substantially standing annual rings of all sides may by this be obtained.
  • said first cuts are applied substantially in parallel with the extension of the fibres of the log in the longitudinal direction of the log, and according to another preferred embodiment of the invention said first cuts are applied substantially in parallel with the centre axis of the log.
  • the corresponding possibilities are also offered for the other cuts.
  • sawing or cutting in parallel with the fibres as well as in parallel with the heart may be utilised for the method according to the invention.
  • a method for dividing a log according to a preferred embodiment of the invention is composed will now be described with reference to Fig. 1.
  • surface-near material is removed according to two first cuts 2, 3 applied in the longitudinal direction of the log on each side of the centre axis of the log along two planes extending in the transversal direction of the log substantially in parallel with each other for forming first cut surfaces 4.
  • two second cuts 5, 6 are applied on the log in the longitudinal direction thereof between the planes defined by said cut surfaces 4 and extending in the transversal direction of the log substantially in parallel with these planes, so that a centre wood piece 7 is obtained.
  • Two third cuts 17, 18 are then applied on each of the two outer pieces 15, 16 obtained by applying the second cuts 5, 6 on each side of the centre axis of the log, i.e. when looking at the log not divided yet, substantially perpendicularly to the first cut surface 4 while intersecting them so that sub-surfaces 19, 20 result on each side of the respective third cut, so that four first wood pieces 21, each having one said sub-surface 19 are formed in this way.
  • Two second wood pieces 22 in the form of cross-sawn industrial wood having very good properties are in this way obtained, which have a substantially rectangular cross-section with the side of the cross-section rectangle formed by the two third cuts 17, 18, a sub-surface part 20 of the first cut surface as well as a part of a second cut 5 and 6, respectively.
  • the first wood pieces 21 may then be placed in for example a planning machine while utilising the sub-surface 19 and the part of the second cut 5 or 6 extending substantially in parallel therewith as guide surfaces when planning, in which material is removed in the longitudinal direction of the log along a surface extending in the transversal direction substantially perpendicularly to said guide surfaces on opposite side of the first wood piece with respect to the surface generated by the respective third cut 17, 18. It is then possible to carry out the machining so that groove or tongue is formed in the surface resulting from the machining.
  • a wood unit 23 having a longitudinal inner hollow space 24 according to Fig. 2.
  • This wood unit has substantially standing annual rings at all surfaces, and the area inscribed by the outer outline thereof is considerably larger than the total cross-section area of the four wood pieces thereof, so that a considerable "wood gain” is made. It is also well possible to machine the circle arc surface of the respective wood piece 21 shown in Fig. 1 and 2 in an optional desired way before the gluing of the pieces together or for using the wood pieces so obtained in another way than by gluing them together with three other such ones, for example by flat planning this surface.
  • a method according to a second preferred embodiment of the invention may look like, in which this method only differs from that shown in Fig. 1 by the application of three second cuts, i.e. a second cut 25 extending substantially through the centre axis of the log is also applied, and the marrow streak is in this case not removed, which however is well possible.
  • This method is suited for larger log dimensions. It would also be possible to apply further second cuts when the dimensions are very large, and it would also be possible to apply more than two third cuts in such cases.
  • Said second cuts may for example be applied in a sawmill and then the first and third cuts be applied on said outer pieces after transport thereof to another sawmill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP99930038A 1998-05-29 1999-05-28 A method for dividing a log and a wood unit Expired - Lifetime EP1115540B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9801911 1998-05-29
SE9801911A SE510493C2 (sv) 1998-05-29 1998-05-29 Förfarande för sönderdelning av en stock samt virkesenhet
PCT/SE1999/000914 WO1999062679A1 (en) 1998-05-29 1999-05-28 A method for dividing a log and a wood unit

Publications (2)

Publication Number Publication Date
EP1115540A1 EP1115540A1 (en) 2001-07-18
EP1115540B1 true EP1115540B1 (en) 2006-02-15

Family

ID=20411513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99930038A Expired - Lifetime EP1115540B1 (en) 1998-05-29 1999-05-28 A method for dividing a log and a wood unit

Country Status (5)

Country Link
EP (1) EP1115540B1 (sv)
AT (1) ATE317750T1 (sv)
DE (1) DE69929884T2 (sv)
SE (1) SE510493C2 (sv)
WO (1) WO1999062679A1 (sv)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LT5083B (lt) 2002-04-17 2003-12-29 Erowa Ag Apdirbamos detalės užspaudimo įrenginys
LT5383B (lt) 2006-01-27 2006-11-27 Sergej Saveljev MEDIENOS GAMINYS IR JO GAMYBOS BuDAS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE115667C1 (sv) * 1943-02-17 1946-01-15
FI76726C (sv) * 1984-07-05 1988-12-12 Schauman Wilh Oy Förfarande för styckning av runt sågstockar
SE463467B (sv) * 1989-09-12 1990-11-26 Traeform Ab Massiv laettregel foer uppbyggnad av ett regelverk
EP0518246B1 (de) * 1991-06-14 1999-03-17 Berthold Fries Verfahren zur Holzhohlbalkenherstellung und Holzhohlbalkenformen nach diesem Verfahren
SE9103009L (sv) * 1991-10-16 1993-04-17 Lars Hammarstroem Foerfarande foer reducering av en stock

Also Published As

Publication number Publication date
DE69929884T2 (de) 2006-10-26
DE69929884D1 (de) 2006-04-20
SE9801911L (sv) 1999-05-31
EP1115540A1 (en) 2001-07-18
SE510493C2 (sv) 1999-05-31
ATE317750T1 (de) 2006-03-15
SE9801911D0 (sv) 1998-05-29
WO1999062679A1 (en) 1999-12-09

Similar Documents

Publication Publication Date Title
US6286287B1 (en) Converted wood articles
FI99194C (sv) Anordning och förfarande för behandling av trävaror
CA2316668C (en) Engineered wood member and method of its manufacture
AU2582795A (en) Spectrophotometric method to measure quality and strength parameters in trees, lumber, timber, chips, saw dust, pulp and paper
US6164027A (en) Method to produce elongated objects of wood
EP1080857A2 (en) Laminated timber element and a sawing method for timber
EP1115540B1 (en) A method for dividing a log and a wood unit
US6276413B1 (en) Method of making a wood product
DK1023146T3 (da) Fremgangsmåde til fremstilling af møbelplade ved limning og plade fremstillet ifølge fremgangsmåden
DE69926525D1 (de) Holzspan und verfahren zur herstellung von zellstoff
US6907707B2 (en) Converted wood article
EP1532326B1 (en) A panel having a wooden body made by board-shaped building elements
RU2051026C1 (ru) Способ переработки круглых лесоматериалов, имеющих сердцевинную гниль
SE9501916L (sv) Förfarande för sönderdelning av en stock samt för framställning av en sammansatt virkesenhet
RU2171175C1 (ru) Способ получения пилопродукции из хлыстов, пораженных сердцевинной гнилью
SE9704318D0 (sv) Limträprodukt samt sätt att tillverka sådan
WO2002064910A1 (en) A wall cladding board and a method for making the same
JPH06122106A (ja) 工芸的集成材とその製法
Jones Fingerjointing can raise solid-wood recovery
BG48841A1 (en) Method for manufacture of veneer from rounded thin wood having a small diameter
NZ227292A (en) Forming hollow timber beams from smaller section solid timbers
CZ3923U1 (cs) Složený dřevěný podélný útvar, zejména hranol
TH22543EX (th) ไม้อัดแผ่นและวิธีการผลิตวัสดุอื่นที่คล้ายคลึงกัน
TH22543A (th) ไม้อัดแผ่นและวิธีการผลิตวัสดุอื่นที่คล้ายคลึงกัน
WO1999011440A1 (en) A method for operation of a saw mill and a wood unit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010112

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FI FR GB

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HOLMEN AB

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HAMMARSTROEM, LARS

17Q First examination report despatched

Effective date: 20040914

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FI FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69929884

Country of ref document: DE

Date of ref document: 20060420

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

26N No opposition filed

Effective date: 20061116

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20150512

Year of fee payment: 17

Ref country code: DE

Payment date: 20150519

Year of fee payment: 17

Ref country code: GB

Payment date: 20150527

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20150427

Year of fee payment: 17

Ref country code: FR

Payment date: 20150508

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69929884

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 317750

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160528

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160528

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160528

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160531

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160528