EP0591225A1 - A device for cutting plywood veneer. - Google Patents

A device for cutting plywood veneer.

Info

Publication number
EP0591225A1
EP0591225A1 EP92907313A EP92907313A EP0591225A1 EP 0591225 A1 EP0591225 A1 EP 0591225A1 EP 92907313 A EP92907313 A EP 92907313A EP 92907313 A EP92907313 A EP 92907313A EP 0591225 A1 EP0591225 A1 EP 0591225A1
Authority
EP
European Patent Office
Prior art keywords
blade
veneer
cutting
web
shaft
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.)
Granted
Application number
EP92907313A
Other languages
German (de)
French (fr)
Other versions
EP0591225B1 (en
Inventor
Kari Sintonen
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.)
Raute Wood Processing Machinery Oy
Original Assignee
Raute Oyj
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 Raute Oyj filed Critical Raute Oyj
Publication of EP0591225A1 publication Critical patent/EP0591225A1/en
Application granted granted Critical
Publication of EP0591225B1 publication Critical patent/EP0591225B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B26D1/62—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder
    • B26D1/626—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D11/00—Combinations of several similar cutting apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G1/00—Machines or devices for removing knots or other irregularities or for filling-up holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/08—Severing sheets or segments from veneer strips; Shearing devices therefor; Making veneer blanks, e.g. trimming to size

Definitions

  • the object of the invention is a device for cutting ply- wood veneer.
  • the device is intended for cutting the veneer web issuing forth from a plywood lathe. The cutting is executed either so that the faulty spots are cut off or the veneer web is cut into sheets o certain width at set intervals.
  • the device is especially intended for a veneer cutting application in which the veneer web cut off a log is slit into two parts in the longitudinal direction, i.e. in the direction of motion of the veneer web in so far as the web has faulty spots.
  • the slitting is normally executed essentially along the middle of the web. Following the implementation of this method, the faults are removed independently from either part of the veneer web, whereas the sound part of the web is cut to set widths along the entire web without slitting it.
  • the invention that is the subject of this application brings about an essential improvement to the said problem in that the device in accordance with the invention makes it possible to execute both the cutting off of faulty spots in the web halves as well as the cutting into set widths of complete web sections.
  • the device in accordance with the invention is based on what may be called the technique of a rotary-blade cutter which embodies a cutting blade reaching across the web to be cut, the said cutting blade lending itself to be rotated in a con ⁇ trolled manner into cutting contact with a selected cut ⁇ ting point on the veneer web.
  • the rotary motion of the said blade has been selected to be such that it complies with the forward motion of the veneer web whereupon the blade does not cause the veneer web to be arrested on being cut.
  • this type of a cutting blade works in unison with a roller supporting the veneer web or with a correspon ⁇ ding opposing organ against which the blade is forced in order for the cutting action to be executed.
  • the blade can be made to sufficiently massive for the cutting oper- ation to occur successfully.
  • the said massiveness of the blade may be achieved, for instance, by making the blade shaft sufficiently solid.
  • the cutting ap ⁇ paratus may embody an abutting organ on the side opposite to the blade, the said abutting organ providing the blade with support for the cutting operation to be executed.
  • the stiffness of a structurally light blade can be in ⁇ creased by subjecting the blade shaft to tensile stress when in use.
  • the said blade element is divided into two consecutive sections along its shaft, the rotational position of the said elements being such that they can be controlled independently.
  • the invention is described by means of the appended dra ⁇ wing.
  • the drawing shows the blade arrangement in accordance with the invention, the said arrangement embodying a shaft 1 reaching across the entire veneer web that is to be cut and the two blade elements 2 and 2 ' ' supported by it.
  • the blade elements may be rotated independently on the shaft 1 and they are provided with their own rotating apparatus.
  • the blade elements 2 ' and 2 ' ' execute cutting operations on the web halves independently on one another in order to remove faulty spots from their respective halves.
  • the slitting of the veneer web coming to the slitter is discontinued and the control for the blade elements 2 ' and 2 ' ' are combined to obey the same command, this command usually being to cut the veneer web into sheets of certain width.
  • the blade elements 2' and 2" are, of course, angularly in unison with one another and form a contiguous blade reaching across the veneer web.
  • the said joint-function model may include situations in which the veneer web contains faulty spots that need to be removed. When this is the case, the faulty spots are cut off in strips extending across the entire veneer web by the blade elements 2 ' and 2 ' ' working in unison.
  • the blade elements 2 ' and 2 ' ' are composed of two blades 2'a, 2'b, and correspondingly 2 / a , 2' , b
  • the blade elements may consist more blades; e.g. four blades positioned at even angles on a shaft. Even one blade per blade element 2 ' and 2 ' ' forms a functioning solution.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Wood Veneers (AREA)

Abstract

Dispositif servant à couper le bois de placage de manière à éliminer les anomalies, et à couper le bois de placage en feuilles à des intervalles prédéterminés. Le dispositif est muni d'une lame rotative constituée de deux sections commandées indépendamment l'une de l'autre.Device for cutting veneer so as to eliminate anomalies, and for cutting veneer into sheets at predetermined intervals. The device is provided with a rotating blade consisting of two sections controlled independently of each other.

Description

A device for cutting plywood veneer
The object of the invention is a device for cutting ply- wood veneer.
The device is intended for cutting the veneer web issuing forth from a plywood lathe. The cutting is executed either so that the faulty spots are cut off or the veneer web is cut into sheets o certain width at set intervals. The device is especially intended for a veneer cutting application in which the veneer web cut off a log is slit into two parts in the longitudinal direction, i.e. in the direction of motion of the veneer web in so far as the web has faulty spots. The slitting is normally executed essentially along the middle of the web. Following the implementation of this method, the faults are removed independently from either part of the veneer web, whereas the sound part of the web is cut to set widths along the entire web without slitting it.
While the said method does save web, because faulty spots seldom extend very far across the web, it also imposes great demands on the cutting apparatus. In applications of this method it is known for more than one slitter to be used; that is to say, two narrow slitters are used for cutting off the faulty spots in the two halves of the web and one full-size slitter is used for cross cutting comp¬ lete web sections.
The invention that is the subject of this application brings about an essential improvement to the said problem in that the device in accordance with the invention makes it possible to execute both the cutting off of faulty spots in the web halves as well as the cutting into set widths of complete web sections. The device in accordance with the invention is based on what may be called the technique of a rotary-blade cutter which embodies a cutting blade reaching across the web to be cut, the said cutting blade lending itself to be rotated in a con¬ trolled manner into cutting contact with a selected cut¬ ting point on the veneer web. The rotary motion of the said blade has been selected to be such that it complies with the forward motion of the veneer web whereupon the blade does not cause the veneer web to be arrested on being cut.
Usually this type of a cutting blade works in unison with a roller supporting the veneer web or with a correspon¬ ding opposing organ against which the blade is forced in order for the cutting action to be executed. The blade can be made to sufficiently massive for the cutting oper- ation to occur successfully. The said massiveness of the blade may be achieved, for instance, by making the blade shaft sufficiently solid. Alternatively, the cutting ap¬ paratus may embody an abutting organ on the side opposite to the blade, the said abutting organ providing the blade with support for the cutting operation to be executed. The stiffness of a structurally light blade can be in¬ creased by subjecting the blade shaft to tensile stress when in use.
In accordance with the invention, the said blade element is divided into two consecutive sections along its shaft, the rotational position of the said elements being such that they can be controlled independently.
The invention is described by means of the appended dra¬ wing.
The drawing shows the blade arrangement in accordance with the invention, the said arrangement embodying a shaft 1 reaching across the entire veneer web that is to be cut and the two blade elements 2 and 2 ' ' supported by it. The blade elements may be rotated independently on the shaft 1 and they are provided with their own rotating apparatus. When the slit veneer web passes underneath the blade structure 2, and it contains random faults on one half or the other or simultaneously on both halves, the blade elements 2 ' and 2 ' ' execute cutting operations on the web halves independently on one another in order to remove faulty spots from their respective halves.
Once the peeling of the veneer web has proceeded onto the sound part of the peeled log, the slitting of the veneer web coming to the slitter is discontinued and the control for the blade elements 2 ' and 2 ' ' are combined to obey the same command, this command usually being to cut the veneer web into sheets of certain width. When executing this function, the blade elements 2' and 2" are, of course, angularly in unison with one another and form a contiguous blade reaching across the veneer web. The said joint-function model may include situations in which the veneer web contains faulty spots that need to be removed. When this is the case, the faulty spots are cut off in strips extending across the entire veneer web by the blade elements 2 ' and 2 ' ' working in unison.
In deviation from the above execution model, where the blade elements 2 ' and 2 ' ' are composed of two blades 2'a, 2'b, and correspondingly 2/ a , 2',b, the blade elements may consist more blades; e.g. four blades positioned at even angles on a shaft. Even one blade per blade element 2 ' and 2 ' ' forms a functioning solution.

Claims

Claims :
1. A device for cutting a veneer web into sheets of cer¬ tain width and/or for removing faulty spots by means of a cutting blade (2) that can be rotated in a controlled manner on a shaft (1) , the said blade (2) traversing es¬ sentially crosswise across the veneer web and lending itself to be rotated into cutting contact with the veneer web to execute a crosswise cut so that the blade complies with the motion of the veneer web, characterized in that the blade (2) is formed of two independently controllable sections (2', 2") along the shaft (1).
2. A device in accordance with claim 1, characterized in that each of the blade sections (2', 2,,) extends to half-way across the veneer web to be cut.
3. A device in accordance with claim 1 or 2, character¬ ized in that both of the blade sections contain two blad- es (2'a, 2'b; 2"a, 2"b) oppositely located with respect to the shaft (1) .
4. A device in accordance with any of claims 1 to 3, cha¬ racterized in that the blade (2) is arranged to cut the veneer against a supporting roller while at the same time behind abutting on a supporting organ.
5. A device in accordance with claim 4, characterized in that the blade shaft (1) is under tensile stress.
6. A device in accordance with any of claims 1 to 3, cha¬ racterized in that the blade (2) is mounted onto a mass¬ ive shaft (1) that is solid enough to provide the blade with sufficient support for the execution of the veneer cutting operation.
EP92907313A 1991-06-26 1992-03-27 A device for cutting plywood veneer Expired - Lifetime EP0591225B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI913111A FI87431C (en) 1991-06-26 1991-06-26 Veneer cutting device
FI913111 1991-06-26
PCT/FI1992/000091 WO1993000206A1 (en) 1991-06-26 1992-03-27 A device for cutting plywood veneer

Publications (2)

Publication Number Publication Date
EP0591225A1 true EP0591225A1 (en) 1994-04-13
EP0591225B1 EP0591225B1 (en) 1995-08-23

Family

ID=8532798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92907313A Expired - Lifetime EP0591225B1 (en) 1991-06-26 1992-03-27 A device for cutting plywood veneer

Country Status (6)

Country Link
EP (1) EP0591225B1 (en)
JP (1) JPH06508800A (en)
CA (1) CA2109583C (en)
DE (1) DE69204286T2 (en)
FI (1) FI87431C (en)
WO (1) WO1993000206A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1249595B (en) * 1991-02-12 1995-03-09 Cremona Angelo & Figlio CUTTING STATION IN SHEETS FOR SHEETS OF WOOD
FR2766476B1 (en) * 1997-07-22 1999-09-03 Ceca Sa IMPROVED ZEOLITIC ADSORBENT FOR THE SEPARATION OF AIR GASES AND PROCESS FOR OBTAINING SAME

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE395235B (en) * 1974-05-02 1977-08-08 Durand Machine Co Ltd ROTARY FANERSKER
IT1129514B (en) * 1980-01-14 1986-06-04 Colombo & Cremona Sas IMPROVEMENTS TO THE ROTARY CUTTERS TO ADAPT THEM TO THE CUT OF SHEETS IN WOOD
IT206331Z2 (en) * 1985-09-25 1987-08-10 Cremona Angelo & Figlio PERFECTED ROTARY CUTTER FOR LEAF MATERIALS, IN PARTICULAR SHEETS OF WOOD.
JPH0635125B2 (en) * 1986-02-13 1994-05-11 株式会社名南製作所 Veneer veneer cutting device
US4726271A (en) * 1986-10-21 1988-02-23 Elliott Bay Industries, Inc. Rotary cutting machine
FI80230B (en) * 1988-05-10 1990-01-31 Plymachine Engineering Oy Veneer cutter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9300206A1 *

Also Published As

Publication number Publication date
DE69204286T2 (en) 1996-05-09
CA2109583A1 (en) 1993-01-07
JPH06508800A (en) 1994-10-06
FI87431C (en) 1993-01-11
FI87431B (en) 1992-09-30
DE69204286D1 (en) 1995-09-28
EP0591225B1 (en) 1995-08-23
CA2109583C (en) 2004-02-03
WO1993000206A1 (en) 1993-01-07
FI913111A0 (en) 1991-06-26

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