EP0486770B1 - Verfahren und Vorrichtung zum spanlosen Abtrennen von Holzlamellen von einem Kantholz - Google Patents

Verfahren und Vorrichtung zum spanlosen Abtrennen von Holzlamellen von einem Kantholz Download PDF

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Publication number
EP0486770B1
EP0486770B1 EP91114048A EP91114048A EP0486770B1 EP 0486770 B1 EP0486770 B1 EP 0486770B1 EP 91114048 A EP91114048 A EP 91114048A EP 91114048 A EP91114048 A EP 91114048A EP 0486770 B1 EP0486770 B1 EP 0486770B1
Authority
EP
European Patent Office
Prior art keywords
support
drive belt
lamina
squared beam
squared
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
EP91114048A
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German (de)
English (en)
French (fr)
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EP0486770A1 (de
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.)
Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Original Assignee
Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
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Publication date
Application filed by Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik filed Critical Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Publication of EP0486770A1 publication Critical patent/EP0486770A1/de
Application granted granted Critical
Publication of EP0486770B1 publication Critical patent/EP0486770B1/de
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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
    • B27L5/06—Cutting strips from a stationarily- held trunk or piece by a rocking knife carrier, or from rocking trunk or piece by a stationarily-held knife carrier; Veneer- cutting machines
    • 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
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/04—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed chains or belts

Definitions

  • the invention relates to a method for the non-cutting removal of wooden lamellae from a square timber, the square timber being conveyed in several successive revolutions along a knife, each of which cuts a wooden lamella until only a remaining lamella remains from the square timber, an endlessly rotating drive belt counteracting the square timber the knife presses.
  • chipless cutting technology Such methods, which are referred to as “chipless cutting technology", are known.
  • One of the advantages of this method is that there is no material loss in the form of sawdust.
  • the prepared, ie all-round processed squared timber is broken down into the wooden slats in several successive runs.
  • wood lamella is understood to mean any flat, elongated wood product up to board thickness. The only waste or material loss that arises with this working process is the remaining lamella after the last wooden lamella has been cut off.
  • the thickness of this remaining lamella and thus the size of the material loss is determined by the fact that the endlessly rotating drive belt, which presses the squared timber against the knife, can only be advanced against the knife to such an extent that it does not come into contact with the knife. otherwise it would be destroyed.
  • the devices for cutting wood lamellae from a square timber without cutting are usually designed in such a way that the square timber is pressed from above against the knife below.
  • the lower run of the endless drive belt has a certain sag even at the highest possible belt tension, which also depends on the belt length and the material properties, in particular the elasticity of the drive belt.
  • the "remaining lamella” is the rest of the squared timber remaining after the last wooden lamella has been cut off. This remaining lamella must still be so thick that the drive belt does not touch the knife due to its sag after passing through the remaining lamella, a considerable additional safety distance having to be maintained because the size of the sag of the drive belt cannot be determined reliably enough and after a long period of operation increases.
  • the object of the invention is to develop a method of the type mentioned at the outset such that the squared timber can be broken down into wooden lamellae as completely as possible, ie with as little material loss as possible. This means that the remaining lamella is thinner than the wooden lamellae produced.
  • This object is achieved in that before the separation of at least the wooden lamella, a supporting lamella is inserted between the drive belt and the remaining lamella of the squared timber and is conveyed together with the latter.
  • the distance to be maintained between the drive belt and the knife when the last wooden lamella is severed can be selected to be so large that the drive belt is reliably prevented from touching and damaging the knife.
  • the thickness of the support lamella is chosen so that it is certainly greater than the largest band slack that occurs. Then the squared timber can be processed except for any thin lamella. Even if the remaining lamella is very thin, the drive belt remains so far away from the knife during the last run that it does not come into contact with the knife when the belt slack subsequently sets in.
  • the support plate preferably a plurality of support plates, is or are conveyed from the outlet of the drive belt to its inlet. This allows working with a relatively small stock of support slats.
  • the support plates are temporarily stored at one point in the circuit.
  • This intermediate storage forms a buffer, which ensures that a sufficient number Support slats are kept ready for use at the belt inlet.
  • the invention also relates to an advantageous device for carrying out the method.
  • the device according to the invention is based on a device with an endlessly rotating height-adjustable drive belt that transports the squared timber in the longitudinal direction and presses the squared timber against a knife that separates the wooden lamella, and with a conveyor device that conveys the squared timber in the circuit to the inlet under the drive belt.
  • the device according to the invention is characterized in that a feed device is arranged in front of the inlet of the drive belt, which places a support lamella on the square timber, and in that a removal device is arranged behind the outlet of the drive belt, which removes the support lamella from the remaining lamella of the square timber, and in that a transport device for the support slats, the removal device connects to the application device.
  • This device increases the construction effort only insignificantly, but enables a significantly increased wood yield by reducing the material losses due to the remaining lamellae.
  • the device or system shown in the drawing serves to separate a wooden lamella 2 from a square timber 1 machined on all sides in each pass.
  • the squared timber 1 is conveyed up on a longitudinal conveyor, for example a chain bed or roller bed 3, and processed in a cutting station 4.
  • an endlessly rotating drive belt 5 is accommodated in a height-adjustable frame 7 guided on the machine frame 6 and is driven by a motor 8.
  • the lower run 5a of the drive belt 5 is supported by the frame 7
  • Pressure rollers 9 pressed against the top of the square timber 1 runs over a roller bed 10 in the machine frame 6 of the cutting station 4 and is pressed by the drive belt 5 against a knife 11 which separates the wooden lamella 2 from the bottom side of the square timber 1.
  • the remaining squared timber or the remaining lamella 1a remaining after the last wooden lamella 2 has been cut off is conveyed away on a roller bed 3a adjoining the cutting station 4.
  • the squared timber 1 is conveyed again in the circuit from the outlet of the cutting station 4 to the separation of further wooden lamellae 2 to the inlet thereof.
  • the rest of the squared timber 1 is referred to as the remaining lamella 1, which is too thin to separate a wooden lamella 2 from it.
  • This remaining lamella 1a is conveyed away after leaving the cutting station 4.
  • an application device 12 is arranged at the inlet of the drive belt 5, the details of which are shown in FIG. 5.
  • a support lamella 17 is laterally displaced from a stack 16, actuated by a pressure medium cylinder 14, from a stack 16, from a stack 16, and placed on the rest of the squared timber 1, which is on the roller conveyor 3 is located.
  • This placement of a support lamella 17 only takes place when the rest of the squared timber 1 has become so thin after the separation of several wooden lamellae 2 that the drive belt 5 would have to be lowered so deep that the lower belt strand 5a after the wood has passed through with the knife 11 in Can come into contact, so that it would be damaged.
  • the supporting lamella 17 placed on the squared timber 1 before the entry into the cutting station 4 increases the distance between the lower belt strand, which is sagging by a certain amount 5a and the knife 11 so that the band strand 5a cannot come into contact with the knife 11.
  • a driven transport roller 18 (FIG. 1) takes over the transport in the longitudinal direction of the squared timber 1 or the remaining lamella 17 placed thereon.
  • the remaining lamella 1a of the square timber 1 remaining after the last wooden lamella 2 has been cut off, together with the supporting lamella 17 located thereon, is conveyed further by a driven transport roller 19 on the roller bed 3a and reaches a removal device 20.
  • the supporting lamella 17 is removed from the remaining lamella 1a by means of pressure-actuated cylinders 21 and sliders 22 and transported in the transverse direction via transverse conveyor belts 23 to a longitudinal conveyor 24. From there, the remaining lamellae 17 return to the stacking device 13 via further transverse conveyor belts 25, which are shown in detail in FIG. 5.
  • the stacking device 13 which forms an intermediate bearing for the support plates 17, has pivot arms 27 which can be actuated by cylinders 26 and which each cycle feed a support plate 17 onto two pivoting flaps 28. If the two swivel flaps 28 are then folded down into the position indicated by dash-dotted lines in FIG. 5, the support plate 17 received thereon falls onto the stack 16. From this stack 16, the individual support plates 17 are then replaced in the manner already described by the Slider 15 removed.
  • FIG. 7 shows, in a representation similar to FIG. 5, another possible embodiment of an intermediate storage device for a plurality of support lamellae 17 on the application device 12.
  • the intermediate storage device is formed here by a flat conveyor 29, for example a belt conveyor, which conveys the support lamellae 17 in the transverse direction.
  • the incoming support lamellae 17 are transferred from the longitudinal conveyor 24 to the cross conveyor 29 by means of a slide 30 and collected there.
  • a two-armed lever 31 At the end of the cross conveyor 29 there is a two-armed lever 31, which is controlled in such a way that it is held alternately in front of the side edge of the foremost support lamella 17 or in a recess 17a on the top of the next support lamella 17 with holding lugs 31a and 31b attached at both ends thereof intervenes.
  • a support lamella 17 is only released for application to the square timber 1 if it was determined in the central control system via a measuring device (not shown) that the rest of the square timber 1 is so thin that the Placing a support plate 17 is required.
  • the squared timber 1 conveyed out of the cutting station 4 runs in the longitudinal direction via the removal device 20 to a cross conveyor 32 and arrives from there via a longitudinal conveyor 33 and one another (not shown) cross conveyor again to the inlet of the cutting station. If a support lamella 17 was placed, which was at least before the last wooden lamella 2 was cut off, but possibly already - depending on the thickness of the wooden lamellae - when the preceding wooden lamellae, the support lamella 17 is removed in the removal device 20 in the manner already described and conveyed again in the circuit to the inlet of the cutting station 4. If the remaining lamella 1a remaining after the last wooden lamella 2 has been cut off is so thin that no further wooden lamella 2 can be separated therefrom, then this remaining lamella 1a is conveyed away without again coming to the cutting station 4.
  • FIG. 6 a modified version of the system is shown in FIG. 6.
  • the support lamella 17 is lifted from the squared timber 1 or the remaining lamella 1a located in the removal device 20 and conveyed in the longitudinal direction up to a cross conveyor 34.
  • the support plates 17 used here have longitudinal grooves on their longitudinal edges, in which guide wheels 35 engage from both sides. The guide wheels 35 raise the support plate 17 and promote it in the longitudinal direction.
  • the circulation of the support lamellae 17 takes place, as already described, via the cross conveyor 34 and the longitudinal conveyor 24 for the entry of the cutting station.
  • the squared timber 1 or the remaining lamella 1a is taken over by the cross conveyor 32 and transferred to the longitudinal conveyor 33.
  • the intermediate storage device 13 or 29 is shown on the application device 12.
  • the intermediate storage facility can also be located on the Removal device 20 or in the region of the transport devices which support the support lamella 17 in the circuit.
  • the support lamellae 17 consist of wear-resistant material, for example of metal, plastic, hardwood, wood composite material or laminated material. Their wear resistance should be so high that they have a sufficiently long service life. However, the material should be so soft that it does not damage the knife 11 when the support plate 17 comes into contact with the knife 11.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Laser Beam Processing (AREA)
  • Processing Of Solid Wastes (AREA)
EP91114048A 1990-10-20 1991-08-22 Verfahren und Vorrichtung zum spanlosen Abtrennen von Holzlamellen von einem Kantholz Expired - Lifetime EP0486770B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4033471 1990-10-20
DE4033471A DE4033471A1 (de) 1990-10-20 1990-10-20 Verfahren und vorrichtung zum spanlosen abtrennen von holzlamellen von einem kantholz

Publications (2)

Publication Number Publication Date
EP0486770A1 EP0486770A1 (de) 1992-05-27
EP0486770B1 true EP0486770B1 (de) 1995-01-11

Family

ID=6416758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114048A Expired - Lifetime EP0486770B1 (de) 1990-10-20 1991-08-22 Verfahren und Vorrichtung zum spanlosen Abtrennen von Holzlamellen von einem Kantholz

Country Status (3)

Country Link
EP (1) EP0486770B1 (zh)
AT (1) ATE116895T1 (zh)
DE (2) DE4033471A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4201339C1 (zh) * 1992-01-20 1992-07-23 Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295571A (en) * 1963-10-28 1967-01-03 Bork Per Veneer production
US3627006A (en) * 1970-03-02 1971-12-14 Polymer Chemical Co Method and means for producing wood veneer
DE2222694A1 (de) * 1971-04-21 1973-11-22 Marunaka Tekkosho Inc Holzschneidemaschine
DE3247551C2 (de) * 1982-12-22 1986-12-18 Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe Anlage zur Herstellung von Span-, Faser- oder dergleichen Platten
DE8701511U1 (zh) * 1987-01-31 1988-05-26 Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De
FR2625130B1 (fr) * 1987-12-28 1990-05-11 Martin Michel Trancheuse longitudinale a bois et installation de tranchage
US4934199A (en) * 1988-03-25 1990-06-19 Boeing Company Method and apparatus for preparing specimens for destructive testing of graphite epoxy composite material

Also Published As

Publication number Publication date
DE4033471A1 (de) 1992-04-23
EP0486770A1 (de) 1992-05-27
DE4033471C2 (zh) 1992-08-20
ATE116895T1 (de) 1995-01-15
DE59104243D1 (de) 1995-02-23

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