WO1986007300A1 - Method for cutting to size a stack of sheet-like material - Google Patents

Method for cutting to size a stack of sheet-like material Download PDF

Info

Publication number
WO1986007300A1
WO1986007300A1 PCT/SE1986/000285 SE8600285W WO8607300A1 WO 1986007300 A1 WO1986007300 A1 WO 1986007300A1 SE 8600285 W SE8600285 W SE 8600285W WO 8607300 A1 WO8607300 A1 WO 8607300A1
Authority
WO
WIPO (PCT)
Prior art keywords
stack
cutting
sheets
knives
moved
Prior art date
Application number
PCT/SE1986/000285
Other languages
French (fr)
Inventor
Jan Carlsson
Original Assignee
Delkani S.A.
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 Delkani S.A. filed Critical Delkani S.A.
Publication of WO1986007300A1 publication Critical patent/WO1986007300A1/en
Priority to NO870479A priority Critical patent/NO870479L/en
Priority to DK071487A priority patent/DK71487A/en

Links

Classifications

    • 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
    • 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
    • B26D1/01—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 does not travel with the work
    • B26D1/04—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 does not travel with the work having a linearly-movable cutting member
    • B26D1/06—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 does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—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 does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B26D1/09—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 does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type with a plurality of cutting members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
    • B28D1/222—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising by pressing, e.g. presses

Definitions

  • a cutting machine comprising a cutting knife (knives), a pres ⁇ sure beam, a worktable, parallel stops and angular stops.
  • a cutting knife Keratto knife
  • a pres ⁇ sure beam a worktable
  • parallel stops angular stops
  • angular stops For performing the cutting operation, one long side of the stack of veneer layers is first cut clean. Then, the desired size is set by means of a parallel stop against which the clean-cut side of the stack is maintained while the opposite side of the stack is cut clean.
  • the stack of parallel-cut veneer layers is placed against an angular stop where one short side is first cut clean, after which the clean-cut short side of the stack is placed against a longitudinal stop as at the same time the initially cut long side is maintained against the angular stop, whereupon the fourth short side is cut clean.
  • the object of the invention is to overcome this drawback. According to the invention, this object is achieved in that use is made of a cutting device comprising four separate cutting members two of which are moved through the stack from one flat side there ⁇ of for producing two opposed edge surfaces on the sheets and the remaining two cutting members of which are moved through the stack from the opposite flat side thereof for producing the other two opposed edge surfaces on the sheets.
  • the essential difference between traditional cutting techniques and the invention is that the lat- ter makes it possible to work (cut) the veneer layers in the stack on all sides without moving the veneer layers out of their position in relation to the cutting knives.
  • Fig. 1 perspective view
  • Fig. 2 part sectional side view
  • Fig. 3 end view
  • Fig. 1 perspective view
  • Fig. 2 part sectional side view
  • Fig. 3 end view
  • the machine comprises four cutting knives which are arranged in pairs B, B 1 and C, C, a specially designed worktable E, and a pressure beam D for holding down and compressing the stack of layers, e.g. veneer layers.
  • the two knives B, B' which are here parallel, are rigidly interconnected with a mutual spacing which corresponds to the desired width of the layers to be manufactured and which is slightly greater than the width of the pressure beam D, and are mounted on a frame (not shown) so as to be movable above the table E towards and away from it.
  • the two knives C, C which are here parallel and the mutual spacing of which corresponds to the length of the layers to be manufactured, are also mounted on a frame and adapted to move simultaneously underneath the table and through slots F provided therein, in a vertical plane contain ⁇ ing the end surfaces of the knives B, B' when these knives are in a position in which they have cut through the stack.
  • the knives B, B' will occupy this posi ⁇ tion after a pattern of motion which in a downward stroke contains a first vertical phase which, when the knives B, B' have encountered the layers, is fol ⁇ lowed by an oblique phase of movement through the layers.
  • This pattern of motion is known per se, e.g. from U.S. 3,174,375, and is here achieved by pendulum suspension of the knives B.
  • G designates a hydraulic cylinder for the knife C.
  • the method of the invention is carried out in the following manner.
  • a stack A of veneer layers with a length and width oversize (in relation to the spacing between the knives B, B' and C, C*, respectively, are placed in the machine on the worktable E, such that the di- rection of the fibres of the layers coincides with the longitudinal direction of the knives B, B' .
  • the veneer layers are then compressed by means of the pressure beam D and any unevenesses in the layers are leveled out.
  • the two cuttings knives B, B' are caused to make a downward-forward movement or stroke so as to cut through the veneer layers, the worktable E serving as abutment.
  • the two cutting knives C, C which are disposed underneath the worktable transverse ⁇ ly of the fibre direction, are thereafter caused to execute a straight upward movement- or stroke so as to cut through the veneer layers, the pressure beam D then serving as abutment. These two cutting operations are performed without lifting the pressure beam D.
  • the veneer layers are thus clamped in relation to the cutting knives B, B" and C, C during the entire working operation, thus ensuring high angular and dimen ⁇ sional accuracy on the veneer layers cut to size.
  • the knives C, C* can be curved or otherwise profiled. Instead of knives, saws can be used as cutting members.
  • the knives B, B' and C, C, respectively, need not necessarily be con ⁇ nected to each other for simultaneous movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Mining & Mineral Resources (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Pile Receivers (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)

Abstract

Method for cutting a stack of veneer or similar sheet-like material for obtaining sheets of veneer etc. which are cut to size and have at least four sides, in which method the cutting device, which is mounted on a frame for moving in a direction towards and away from the stack of sheets retained between a base (E) and a pressure beam (D), is brought into engagement with the stack for cutting through it. The cutting device consists of four separate cutting members (B, B', C, C') two of which are moved through the stack from one flat side thereof for producing two opposed edge surfaces on the sheets and the remaining two cutting members of which are moved through the stack from the other flat side thereof for producing the other two opposed edge surfaces on the sheets.

Description

METHOD FOR CUTTING TO SIZE A STACK OF SHEET-LIKE MATERIAL
In traditional techniques for cutting to size a stack of veneer layers, use is made of a cutting machine comprising a cutting knife (knives), a pres¬ sure beam, a worktable, parallel stops and angular stops. For performing the cutting operation, one long side of the stack of veneer layers is first cut clean. Then, the desired size is set by means of a parallel stop against which the clean-cut side of the stack is maintained while the opposite side of the stack is cut clean. For longitudinal adjustment, the stack of parallel-cut veneer layers is placed against an angular stop where one short side is first cut clean, after which the clean-cut short side of the stack is placed against a longitudinal stop as at the same time the initially cut long side is maintained against the angular stop, whereupon the fourth short side is cut clean.
This technique means that the stack of veneer layers must be moved many times. Further, when using angular stops, parallel stops and longitudinal stops, it is very difficult to manually ascertain that all veneer layers in the stack are actually maintained against the respective stop. In actual practice, this means that a substantial part of the layers will ex- hibit relatively large dimensional variations.
The object of the invention is to overcome this drawback. According to the invention, this object is achieved in that use is made of a cutting device comprising four separate cutting members two of which are moved through the stack from one flat side there¬ of for producing two opposed edge surfaces on the sheets and the remaining two cutting members of which are moved through the stack from the opposite flat side thereof for producing the other two opposed edge surfaces on the sheets.
The essential difference between traditional cutting techniques and the invention is that the lat- ter makes it possible to work (cut) the veneer layers in the stack on all sides without moving the veneer layers out of their position in relation to the cutting knives.
This ensures angular accuracy and reduced dimen- sional tolerances.
The invention will now be described in greater detail hereinbelow with reference to the accompanying drawings in which Fig. 1 (perspective view). Fig. 2 (part sectional side view), and Fig. 3 (end view) illustrate parts of a machine for carrying out the method according to the invention.
The machine comprises four cutting knives which are arranged in pairs B, B1 and C, C, a specially designed worktable E, and a pressure beam D for holding down and compressing the stack of layers, e.g. veneer layers. The two knives B, B', which are here parallel, are rigidly interconnected with a mutual spacing which corresponds to the desired width of the layers to be manufactured and which is slightly greater than the width of the pressure beam D, and are mounted on a frame (not shown) so as to be movable above the table E towards and away from it. The two knives C, C, which are here parallel and the mutual spacing of which corresponds to the length of the layers to be manufactured, are also mounted on a frame and adapted to move simultaneously underneath the table and through slots F provided therein, in a vertical plane contain¬ ing the end surfaces of the knives B, B' when these knives are in a position in which they have cut through the stack. The knives B, B' will occupy this posi¬ tion after a pattern of motion which in a downward stroke contains a first vertical phase which, when the knives B, B' have encountered the layers, is fol¬ lowed by an oblique phase of movement through the layers. This pattern of motion is known per se, e.g. from U.S. 3,174,375, and is here achieved by pendulum suspension of the knives B. For the strokes of the knives B, B1 and C, C, respectively, use may be made of hydraulic or pneumatic means. G designates a hydraulic cylinder for the knife C.
The method of the invention is carried out in the following manner.
A stack A of veneer layers with a length and width oversize (in relation to the spacing between the knives B, B' and C, C*, respectively, are placed in the machine on the worktable E, such that the di- rection of the fibres of the layers coincides with the longitudinal direction of the knives B, B' . The veneer layers are then compressed by means of the pressure beam D and any unevenesses in the layers are leveled out. The two cuttings knives B, B' are caused to make a downward-forward movement or stroke so as to cut through the veneer layers, the worktable E serving as abutment. The two cutting knives C, C, which are disposed underneath the worktable transverse¬ ly of the fibre direction, are thereafter caused to execute a straight upward movement- or stroke so as to cut through the veneer layers, the pressure beam D then serving as abutment. These two cutting operations are performed without lifting the pressure beam D.
The veneer layers are thus clamped in relation to the cutting knives B, B" and C, C during the entire working operation, thus ensuring high angular and dimen¬ sional accuracy on the veneer layers cut to size.
It will be appreciated that the knives C, C* can be curved or otherwise profiled. Instead of knives, saws can be used as cutting members. The knives B, B' and C, C, respectively, need not necessarily be con¬ nected to each other for simultaneous movement.

Claims

1. Method for cutting a stack of veneer or similar sheet-like material for obtaining sheets of veneer etc. which are cut to size and have at least four sides, in which method a cutting device which is mounted on a frame for moving in a direction towards and away from said stack retained between a base (E) and a pressure beam (D), is brought into engagement with the stack for cutting through it, c h a r a c t e r ¬ i z e d in that use is made of a cutting device com- prising four separate cutting members (B, B', C, C) two of which (B, B' and C, C, respectively) are moved through the stack (A) from one flat side thereof for producing two opposed edge surfaces on the sheets and the remaining two cutting members of which are moved through the stack from the opposite flat side thereof for producing the other two opposed edge sur¬ faces on the sheets.
2. Method as claimed in claim 1, c h a r a c ¬ t e r i z e d wherein the cutting members (B, B', C, C ) consist of knives, two of which (B, B') are moved through the stack in the direction of the fibres of the sheets in said stack, by executing a vertical movement combined with a movement in said direction of the fibres, while the other two knives (C, C) are moved through the stack in a vertical movement.
3. Method as claimed in claim 1 or 2, c h a r a c ¬ t e r i z e d in that said two knives are moved through the stack simultaneously.
PCT/SE1986/000285 1985-06-13 1986-06-13 Method for cutting to size a stack of sheet-like material WO1986007300A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO870479A NO870479L (en) 1985-06-13 1987-02-06 PROCEDURE FOR SIZE CUTTING OF A STABLE LIKE MATERIAL.
DK071487A DK71487A (en) 1985-06-13 1987-02-12 PROCEDURE TO CREATE A STACK OF SIZING MATERIAL IN SIZE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8502938-7 1985-06-13
SE8502938A SE447218B (en) 1985-06-13 1985-06-13 MAKE SIZE A STACK OF SHEET MATERIAL

Publications (1)

Publication Number Publication Date
WO1986007300A1 true WO1986007300A1 (en) 1986-12-18

Family

ID=20360563

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1986/000285 WO1986007300A1 (en) 1985-06-13 1986-06-13 Method for cutting to size a stack of sheet-like material

Country Status (3)

Country Link
DK (1) DK71487A (en)
SE (1) SE447218B (en)
WO (1) WO1986007300A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0530737A2 (en) * 1991-09-05 1993-03-10 FILTERWERK MANN & HUMMEL GMBH Device for separating filter elements
CN104589446A (en) * 2015-01-09 2015-05-06 湖州超凡塑木科技有限公司 Device for cutting wooden strip for bamboo blind
CN111906954A (en) * 2020-08-10 2020-11-10 王蒙蒙 Modified cement foamed insulation board forming processing method
EP4155039A1 (en) * 2021-09-27 2023-03-29 IMA Schelling Deutschland GmbH Separating device, edge processing device and method for separating a veneering material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523476A (en) * 1967-07-12 1970-08-11 Takeo Nakagawa Machine for cutting boards
DE2915707A1 (en) * 1978-12-12 1980-07-03 Ompec Di Provenzi Enrico Carug CUTTER FOR VENEER

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523476A (en) * 1967-07-12 1970-08-11 Takeo Nakagawa Machine for cutting boards
DE2915707A1 (en) * 1978-12-12 1980-07-03 Ompec Di Provenzi Enrico Carug CUTTER FOR VENEER

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0530737A2 (en) * 1991-09-05 1993-03-10 FILTERWERK MANN & HUMMEL GMBH Device for separating filter elements
EP0530737A3 (en) * 1991-09-05 1995-02-01 Mann & Hummel Filter Device for separating filter elements
CN104589446A (en) * 2015-01-09 2015-05-06 湖州超凡塑木科技有限公司 Device for cutting wooden strip for bamboo blind
CN111906954A (en) * 2020-08-10 2020-11-10 王蒙蒙 Modified cement foamed insulation board forming processing method
EP4155039A1 (en) * 2021-09-27 2023-03-29 IMA Schelling Deutschland GmbH Separating device, edge processing device and method for separating a veneering material

Also Published As

Publication number Publication date
SE8502938D0 (en) 1985-06-13
DK71487D0 (en) 1987-02-12
SE447218B (en) 1986-11-03
DK71487A (en) 1987-02-12

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