EP0500161B1 - Sheet cutting station for rotary cut wood veneer - Google Patents
Sheet cutting station for rotary cut wood veneer Download PDFInfo
- Publication number
- EP0500161B1 EP0500161B1 EP92200356A EP92200356A EP0500161B1 EP 0500161 B1 EP0500161 B1 EP 0500161B1 EP 92200356 A EP92200356 A EP 92200356A EP 92200356 A EP92200356 A EP 92200356A EP 0500161 B1 EP0500161 B1 EP 0500161B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- station
- accordance
- cut
- transverse
- 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
Links
- 239000002023 wood Substances 0.000 title claims abstract description 16
- 230000007547 defect Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 230000002950 deficient Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 241000252254 Catostomidae Species 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002916 wood waste Substances 0.000 description 1
Images
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
- B26D11/00—Combinations of several similar cutting apparatus
-
- 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
- B26D1/12—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 cutting member moving about an axis
- B26D1/25—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 cutting member moving about an axis with a non-circular cutting member
- B26D1/34—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 cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
- B26D1/40—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 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
- B26D1/405—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 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
-
- 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
- CH 354890 discloses a transverse cutting apparatus in which cutting means comprises two side-by-side transverse blades. If the sheet is wide, then the two blades are operated simultaneously. If the sheet is narrower than one blade, only one blade is operated.
- 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 transverse 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 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.
- 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.
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)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94201351A EP0627285B1 (en) | 1991-02-12 | 1992-02-10 | Transverse cutting device for wood veneer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI910354 | 1991-02-12 | ||
ITMI910354A IT1249595B (it) | 1991-02-12 | 1991-02-12 | Stazione di taglio in fogli per sfogliati di legno |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94201351.7 Division-Into | 1992-02-10 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0500161A2 EP0500161A2 (en) | 1992-08-26 |
EP0500161A3 EP0500161A3 (en) | 1993-02-24 |
EP0500161B1 true EP0500161B1 (en) | 1997-05-02 |
Family
ID=11358533
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94201351A Expired - Lifetime EP0627285B1 (en) | 1991-02-12 | 1992-02-10 | Transverse cutting device for wood veneer |
EP92200356A Expired - Lifetime EP0500161B1 (en) | 1991-02-12 | 1992-02-10 | Sheet cutting station for rotary cut wood veneer |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94201351A Expired - Lifetime EP0627285B1 (en) | 1991-02-12 | 1992-02-10 | Transverse cutting device for wood veneer |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP0627285B1 (it) |
AT (2) | ATE174251T1 (it) |
DE (2) | DE69227842T2 (it) |
ES (2) | ES2127881T3 (it) |
IT (1) | IT1249595B (it) |
Families Citing this family (11)
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 |
US5694995A (en) * | 1995-05-31 | 1997-12-09 | Capital Machine Company, Inc. | Method and apparatus for preparing 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 |
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 |
WO1997032699A1 (en) * | 1996-03-08 | 1997-09-12 | Miller Veneers, Inc. | Method and apparatus for cutting veneer sheets |
US5960104A (en) * | 1996-08-16 | 1999-09-28 | Virginia Polytechnic & State University | Defect detection system for lumber |
WO2005102633A2 (en) | 2004-04-15 | 2005-11-03 | Miller Veneers, Inc. | Method and apparatus for cutting veneer sheets from a flitch |
US9050735B2 (en) | 2006-06-20 | 2015-06-09 | Danzer Services Schweiz Ag | Automatic clipping line |
JP2011513098A (ja) * | 2008-03-11 | 2011-04-28 | パダナ アーゲー | ベニヤ束の交差切断及び結束用装置及びその方法 |
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 |
Family Cites Families (14)
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 |
CH467658A (it) * | 1968-02-02 | 1969-01-31 | Saffa Spa | Taglierina per assicelle |
US3808925A (en) * | 1973-03-12 | 1974-05-07 | Durand Machine Co Ltd | Rotary veneer clipper |
JPS6246601A (ja) * | 1985-08-26 | 1987-02-28 | 橋本電機工業株式会社 | 細幅長尺単板の連続自動処理装置 |
IT206331Z2 (it) * | 1985-09-25 | 1987-08-10 | Cremona Angelo & Figlio | Taglierina rotante perfezionata per materiali in foglia, in particolare sfogliati di legno. |
IT1228658B (it) * | 1989-02-10 | 1991-06-27 | Cremona Angelo & Figlio | Dispositivo per la sezionatura ed l'accatastamento di rivette in 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 |
-
1991
- 1991-02-12 IT ITMI910354A patent/IT1249595B/it active IP Right Grant
-
1992
- 1992-02-10 DE DE69227842T patent/DE69227842T2/de not_active Expired - Fee Related
- 1992-02-10 AT AT94201351T patent/ATE174251T1/de not_active IP Right Cessation
- 1992-02-10 ES ES94201351T patent/ES2127881T3/es not_active Expired - Lifetime
- 1992-02-10 EP EP94201351A patent/EP0627285B1/en not_active Expired - Lifetime
- 1992-02-10 EP EP92200356A patent/EP0500161B1/en not_active Expired - Lifetime
- 1992-02-10 DE DE69219381T patent/DE69219381T2/de not_active Expired - Fee Related
- 1992-02-10 ES ES92200356T patent/ES2101794T3/es not_active Expired - Lifetime
- 1992-02-10 AT AT92200356T patent/ATE152390T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69219381D1 (de) | 1997-06-05 |
EP0627285A2 (en) | 1994-12-07 |
EP0627285A3 (en) | 1995-09-06 |
DE69227842D1 (de) | 1999-01-21 |
EP0500161A3 (en) | 1993-02-24 |
ES2101794T3 (es) | 1997-07-16 |
ATE152390T1 (de) | 1997-05-15 |
ATE174251T1 (de) | 1998-12-15 |
DE69227842T2 (de) | 1999-04-29 |
ITMI910354A0 (it) | 1991-02-12 |
IT1249595B (it) | 1995-03-09 |
EP0627285B1 (en) | 1998-12-09 |
EP0500161A2 (en) | 1992-08-26 |
DE69219381T2 (de) | 1997-11-20 |
ITMI910354A1 (it) | 1992-08-12 |
ES2127881T3 (es) | 1999-05-01 |
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