EP0500161A2 - Machine de découpage pour le placage déroulé - Google Patents

Machine de découpage pour le placage déroulé Download PDF

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Publication number
EP0500161A2
EP0500161A2 EP92200356A EP92200356A EP0500161A2 EP 0500161 A2 EP0500161 A2 EP 0500161A2 EP 92200356 A EP92200356 A EP 92200356A EP 92200356 A EP92200356 A EP 92200356A EP 0500161 A2 EP0500161 A2 EP 0500161A2
Authority
EP
European Patent Office
Prior art keywords
strip
station
accordance
cut
blade units
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
EP92200356A
Other languages
German (de)
English (en)
Other versions
EP0500161B1 (fr
EP0500161A3 (en
Inventor
Lorenzo Cremona
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.)
Angelo Cremona e Figlio SpA
Original Assignee
Angelo Cremona e Figlio SpA
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 Angelo Cremona e Figlio SpA filed Critical Angelo Cremona e Figlio SpA
Priority to EP94201351A priority Critical patent/EP0627285B1/fr
Publication of EP0500161A2 publication Critical patent/EP0500161A2/fr
Publication of EP0500161A3 publication Critical patent/EP0500161A3/en
Application granted granted Critical
Publication of EP0500161B1 publication Critical patent/EP0500161B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D11/00Combinations of several similar cutting apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting 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
    • B26D1/01Cutting 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
    • B26D1/12Cutting 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 cutting member moving about an axis
    • B26D1/25Cutting 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 cutting member moving about an axis with a non-circular cutting member
    • B26D1/34Cutting 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 cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/40Cutting 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 cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
    • B26D1/405Cutting 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 cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G1/00Machines or devices for removing knots or other irregularities or for filling-up holes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00Manufacture of veneer ; Preparatory processing therefor
    • B27L5/08Severing sheets or segments from veneer strips; Shearing devices therefor; Making veneer blanks, e.g. trimming to size

Definitions

  • a method of cutting as mentioned above is substantially the only one used at present and the only palliative found in the known art is reuse of the large quantity of strips of scrap for low quality applications or production of chipboard or the like.
  • the general purpose of the present invention is to obviate the above mentioned shortcomings by supplying a method and a machine for cutting veneer in sheets which would reject defective parts with minimal wood waste.
  • a method of cutting a continuously fed wood veneer strip into sheets comprising the phases of detecting the presence of a plurality of specific zones of the strip, completely cutting the strip transversely on command to obtain sheets of a length included in preset ranges and strips of strip circumscribing specific zones of said plurality such as those containing defects and characterized in that at least in portions of the strip constituting specific zones of said plurality is performed a continuous longitudinal cut to divide it in half strips each cut transversely in predetermined positions to obtain portions of strip circumscribing specific zones or said plurality having a width equal to a fraction of the width of the strip.
  • a sheet cutting station for rotary cut wood veneer fed continuously thereto and comprising in combination means of transverse cutting of the strip commanded by control means to obtain sheets of lengths falling within preset ranges and sensor means for detecting a plurality of specific zones of the strip upstream and downstream of which is performed a transverse cut and characterized in that the cutting means comprise a blade unit designed to perform a complete transverse cut of the strip and individual blade units operated by said control means at strip zones cut longitudinally in half strips by longitudinal cutting means and said individual blade units being designed to cut each half strip.
  • a cutting station indicated as a whole by reference number 10 comprises in accordance with the present invention conveyor belts supplying a veneer strip 12 (arriving from veneer cutting machines of known type and hence not shown) in front of known systems 13 of detection of specific zones of the strip such as those containing defects.
  • Said defect detection systems can for example comprise telecameras, transparency or reflection sensors or the like, as easily imagined by those skilled in the art, to supply information on the presence and position of defects such as for example holes in the veneer transiting opposite them.
  • Such systems of defect detection of the known art being well known to those skilled in the art they are not described further.
  • the means 14 comprise a circular shear 20 driven to cut the veneer in two parallel strips while the means 15 comprise, as better seen in FIG. 3, a rotary-blade cutter made up of blade units consisting of two blades 21 and 22 arranged side by side to rotate coaxially between bucking rollers 23 and 24 by motors 25 and 26 respectively having position sensors.
  • Axial sliding is controlled by a double action piston 28 driven hydraulically through the ducts 40, 54 by a hydraulic control unit 29 connected to electronic processing and control means 19.
  • an axially sliding clutch 30 having a spring 31, e.g. the Melville type, which usually holds it in engagement of the two blades (blades brought near).
  • a spring 32 e.g. the Melville type, which usually holds it in engagement of the two blades (blades brought near).
  • Another spring 32 weaker than the spring 31, placed in the piston 28, maintains axial tension of the blades.
  • FIG. 4 shows schematically an example of an embodiment of the axial clutch 30.
  • integral with the blade 21 is a supporting and containing structure 46 in which is inserted in a sliding manner a shaft 47 integral with the blade 22. Reciprocal rotation between the structure 46 and the shaft 47 is permitted by bearings 48 and 49.
  • the spring 31 pushes between an element 50 integral with the shaft 47 and an element 51 rotating with the shaft 47, sliding coaxially thereto and butted axially on the structure 46 with an interposed bearing 52.
  • the bearing 48 is of known type permitting mutual axial translation of the parts between which it is placed.
  • selection means 16 selectively sending the cut sheets to an automatic stacker 18 and to a scrap bin 17.
  • the selection means 16 are the vacuum type with top conveyor belt 33. Selection is performed separately in front of each blade 21 and 22 and is actuated by suckers 34 and 35. When one of the suckers is operated the wood sheet passing under it after leaving the cutter remains in adherence to the top belt 33, which deposits it on a double belt 36 for conveyance to the stacker 18 On the contrary, if the sucker is not operated the corresponding product leaving the cutter falls freely in the scrap bin 17.
  • Said selectors are of the known art and therefore not further described nor shown.
  • the stacker 18 can be of any type of the known art.
  • a stacker comprising a top belt 37 which, by a vacuum method of the type described for the selector 16, conveys the wood sheets to deposit them in piles selected in accordance with the dimensions of the sheets and which form on the vertically movable tables with full width 38 or halved width 39 for the full width sheets 41 or half width sheets 42 respectively.
  • All the various parts of the station are controlled and commanded to operate substantially as described below by electronic processing and control means 19, e.g. provided by programmed logics such as a microprocessor of the known art programmed in accordance with the description given below and optionally interconnected to a personal computer or the like.
  • electronic processing and control means 19 e.g. provided by programmed logics such as a microprocessor of the known art programmed in accordance with the description given below and optionally interconnected to a personal computer or the like.
  • the control device 19 in addition to processing the data from the sensor and synchronizing the movements of the various devices, commands coupling or not of the two blades of the transverse cutter depending on requirements.
  • the device 19 commands the control unit 29 to supply fluid to the piston through the duct 54.
  • the piston moves the blade 22 axially away from the blade 21, thus disengaging the clutch 30 and permitting the two motors 25 and 26 to rotate the respective blade independently with independent speeds.
  • control device 19 To again engage the blades so that they behave substantially as a single blade the control device 19 first resynchronizes them electronically, putting the motors in step (by means of the signals emitted by their position sensors), so that the blades are rearranged as much as possible with parallel faces, and then commands the control unit 29 to supply the piston 28 with a fluid counterpressure through the duct 40, thus reconnecting the mechanical clutch 30 between the blades.
  • the cutting station described above receives on its conveyors 11 an unbroken strip 12 of wood veneer.
  • the sensor 13 scans the veneer in transit beneath it and sends corresponding signals to the control device 19.
  • the possible conditions which can occur are 'no defect', 'defect on the right half of the veneer', 'defect on the left half of the veneer', 'defect on both halves of the veneer'.
  • the distance between the vertical line of the sensor and the shear 14 permits the processing system 19 to select the best plan for minimizing wood scrap before the zone involved reaches said shear.
  • the system decides whether to start the longitudinal cut or not and whether to perform a transverse cut on the entire width of the veneer or only on one half of it.
  • FIG. 5 shows schematically a possible cutting situation in which the parts of the veneer to be scrapped are identified by oblique lines.
  • the control means 19 activate the longitudinal shear 20 and remove the defect, commanding the blade 21 or 22 corresponding to the defective half so as to remove a strip with the defect, which will be scrapped by the selector means 16. In this manner the half free of defects is not uselessly scrapped as would happen by the known art but there is produced a wood sheet of half width as indicated by 42.
  • the longitudinal cut can be maintained until a defect free section of wood is detected for a length of veneer sufficient to justify obtaining a full width sheet without creating a preceding half sheet too short.
  • a defect free section of wood is detected for a length of veneer sufficient to justify obtaining a full width sheet without creating a preceding half sheet too short.
  • the section of veneer indicated by 44 in FIG. 5 would be acceptable.
  • the senor detects defects affecting both halves of the veneer, e.g. as indicated at 45, the entire defective strip is removed by a double paired cut of the blades 21 and 22.
  • the blades 21 and 22 are commanded by the device 19 at intervals so as to always obtain sheets, halved or not, of a length not exceeding a preset value.
  • the control system can also be programmed to optimize the positions of the transverse cuts so as not to obtain, as far as possible, sheets shorter than a preset value.
  • FIGS. 6 and 7 show schematically a different transverse cutter 15' usable in place of the cutter 15.
  • the cutter 15' comprises a shaft 56 on which are supported independently in a rotating manner two blade holder units each with a plurality 50, 60 of equally spaced radial blades as may be seen well in FIG. 7.
  • bucking roller 61 Parallel to the shaft 56 is a bucking roller 61 on which slides the veneer 12.
  • Each blade holder 57 and 58 is rotated by a motor 62 or 63 through a kinematic transmission, e.g: with a chain, 64 and 65.
  • the motors are mechanically engaged together through an electromechanical joint of the known art, e.g the electromagnetic type controlled by the device 19. In use the cutting station operates as described above.
  • the joint 66 When cuts are to be made on half strips the joint 66 is disengaged and the motors drive the blade holders independently.
  • the device 19 first synchronizes the blades by controlling the motors 62, 63 through position sensors, similarly to the motors of the cutter 15, and then operates the clutch 66 so that the blades of the two blade holders rotate integrally and with mated cutting edges.
  • FIG. 7 shows three blades for each blade unit, as a compromise between cutting speed and manufacturing cost it is also possible to use cutters with a different number of blades.
  • connection means between the blades of the cutters 15 or 15' can be provided differently than described schematically or could even be replaced by only electronic synchronization of the rotation of the respective motors.
  • the sheets emerging from the cutters can be accumulated in a manner different from that shown in the stacker 18, e.g. by selecting them in larger piles.
  • the actual cutting plan can vary depending on which cutting parameter it is intended to favour. For example, it may be preferred to maximize the length of the sheets, even if they are half width, rather than the number of full length but shorter sheets, etc.
EP92200356A 1991-02-12 1992-02-10 Machine de découpage pour le placage déroulé Expired - Lifetime EP0500161B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP94201351A EP0627285B1 (fr) 1991-02-12 1992-02-10 Dispositif de coupe transversale pour placage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI910354A IT1249595B (it) 1991-02-12 1991-02-12 Stazione di taglio in fogli per sfogliati di legno
ITMI910354 1991-02-12

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP94201351.7 Division-Into 1994-05-11

Publications (3)

Publication Number Publication Date
EP0500161A2 true EP0500161A2 (fr) 1992-08-26
EP0500161A3 EP0500161A3 (en) 1993-02-24
EP0500161B1 EP0500161B1 (fr) 1997-05-02

Family

ID=11358533

Family Applications (2)

Application Number Title Priority Date Filing Date
EP94201351A Expired - Lifetime EP0627285B1 (fr) 1991-02-12 1992-02-10 Dispositif de coupe transversale pour placage
EP92200356A Expired - Lifetime EP0500161B1 (fr) 1991-02-12 1992-02-10 Machine de découpage pour le placage déroulé

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP94201351A Expired - Lifetime EP0627285B1 (fr) 1991-02-12 1992-02-10 Dispositif de coupe transversale pour placage

Country Status (5)

Country Link
EP (2) EP0627285B1 (fr)
AT (2) ATE152390T1 (fr)
DE (2) DE69219381T2 (fr)
ES (2) ES2101794T3 (fr)
IT (1) IT1249595B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5960104A (en) * 1996-08-16 1999-09-28 Virginia Polytechnic & State University Defect detection system for lumber
US20110011497A1 (en) * 2008-03-11 2011-01-20 Padana Ag Crossclipping and bundling system and method for veneer packets
CN102350713A (zh) * 2011-08-01 2012-02-15 济南德佳机器控股有限公司 物料优选加工设备及方法
EP2476498A1 (fr) * 2006-06-20 2012-07-18 Padana AG Ligne de rognure automatique

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5562137A (en) * 1995-05-31 1996-10-08 Capital Machine Company, Inc. Method and apparatus for retaining a flitch for cutting
US5868187A (en) 1995-05-31 1999-02-09 Capital Machine Company, Inc. Method and apparatus for retaining a flitch for cutting
US5694995A (en) * 1995-05-31 1997-12-09 Capital Machine Company, Inc. Method and apparatus for preparing a flitch for cutting
US5590700A (en) * 1995-11-15 1997-01-07 Capital Machine Co., Inc. Vacuum flitch table with self-cleaning vacuum valve
US5680887A (en) * 1995-11-30 1997-10-28 Capital Machine Co., Inc. Veneer slicer with timing belt
BR9707956A (pt) * 1996-03-08 2000-01-04 Miller Veneers Inc Método e aparelho para cortar folhas de maderia compensada.
EP1750913A2 (fr) 2004-04-15 2007-02-14 Miller Veneers, Inc. Procede et appareil pour decouper des feuilles de placage a partir d'un quartelot

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616501A (en) * 1947-11-12 1952-11-04 Willis E Smith Combined veneer clipper and trimmer
GB692783A (en) * 1950-02-03 1953-06-17 Marvin Hart Improvements in the production of wood veneers
US2928305A (en) * 1957-01-14 1960-03-15 Prentice Machine Works Inc Veneer clipper for cutting measured lengths with means responsive to feed of work to regulate the cutting cycle
US2942635A (en) * 1959-01-16 1960-06-28 Roy C Horne Method of reconstituting lumber and product thereof
CH353890A (de) * 1957-09-05 1961-04-30 Mueller Ag Furnierschere
US3165961A (en) * 1962-11-30 1965-01-19 Weyerhaeuser Co Apparatus for automatically cutting defective veneer sheets
FR1579361A (fr) * 1968-02-02 1969-08-22
US3808925A (en) * 1973-03-12 1974-05-07 Durand Machine Co Ltd Rotary veneer clipper
US4682639A (en) * 1985-08-26 1987-07-28 Hashimoto Denki Co., Ltd. Apparatus for cutting veneer pieces into equal sections
EP0382281A2 (fr) * 1989-02-10 1990-08-16 ANGELO CREMONA & FIGLIO S.p.A. Dispositif pour couper et empiler des feuilles de bois

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT206331Z2 (it) * 1985-09-25 1987-08-10 Cremona Angelo & Figlio Taglierina rotante perfezionata per materiali in foglia, in particolare sfogliati di legno.
JP2706332B2 (ja) * 1989-11-10 1998-01-28 三菱重工業株式会社 回転ドラム式切断装置
FI86818C (fi) * 1990-12-28 1992-10-26 Raute Oy Avskaerare
FI87431C (fi) * 1991-06-26 1993-01-11 Raute Oy Anordning foer kapning av faner

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616501A (en) * 1947-11-12 1952-11-04 Willis E Smith Combined veneer clipper and trimmer
GB692783A (en) * 1950-02-03 1953-06-17 Marvin Hart Improvements in the production of wood veneers
US2928305A (en) * 1957-01-14 1960-03-15 Prentice Machine Works Inc Veneer clipper for cutting measured lengths with means responsive to feed of work to regulate the cutting cycle
CH353890A (de) * 1957-09-05 1961-04-30 Mueller Ag Furnierschere
US2942635A (en) * 1959-01-16 1960-06-28 Roy C Horne Method of reconstituting lumber and product thereof
US3165961A (en) * 1962-11-30 1965-01-19 Weyerhaeuser Co Apparatus for automatically cutting defective veneer sheets
FR1579361A (fr) * 1968-02-02 1969-08-22
US3808925A (en) * 1973-03-12 1974-05-07 Durand Machine Co Ltd Rotary veneer clipper
US3808925B1 (fr) * 1973-03-12 1990-03-13 Durand Raute Ind Ltd
US4682639A (en) * 1985-08-26 1987-07-28 Hashimoto Denki Co., Ltd. Apparatus for cutting veneer pieces into equal sections
EP0382281A2 (fr) * 1989-02-10 1990-08-16 ANGELO CREMONA & FIGLIO S.p.A. Dispositif pour couper et empiler des feuilles de bois

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5960104A (en) * 1996-08-16 1999-09-28 Virginia Polytechnic & State University Defect detection system for lumber
EP2476498A1 (fr) * 2006-06-20 2012-07-18 Padana AG Ligne de rognure automatique
US9050735B2 (en) 2006-06-20 2015-06-09 Danzer Services Schweiz Ag Automatic clipping line
US20110011497A1 (en) * 2008-03-11 2011-01-20 Padana Ag Crossclipping and bundling system and method for veneer packets
US9993935B2 (en) * 2008-03-11 2018-06-12 Danzer Services Schweiz Ag Crossclipping and bundling system and method for veneer packets
CN102350713A (zh) * 2011-08-01 2012-02-15 济南德佳机器控股有限公司 物料优选加工设备及方法
CN102350713B (zh) * 2011-08-01 2014-04-02 济南德佳机器控股有限公司 物料优选加工设备及方法

Also Published As

Publication number Publication date
ATE174251T1 (de) 1998-12-15
DE69227842T2 (de) 1999-04-29
EP0627285A3 (fr) 1995-09-06
DE69219381T2 (de) 1997-11-20
ES2127881T3 (es) 1999-05-01
ITMI910354A1 (it) 1992-08-12
EP0500161B1 (fr) 1997-05-02
ITMI910354A0 (it) 1991-02-12
EP0500161A3 (en) 1993-02-24
ES2101794T3 (es) 1997-07-16
DE69227842D1 (de) 1999-01-21
EP0627285B1 (fr) 1998-12-09
DE69219381D1 (de) 1997-06-05
EP0627285A2 (fr) 1994-12-07
ATE152390T1 (de) 1997-05-15
IT1249595B (it) 1995-03-09

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