EP0732180A2 - Procédé pour tranches des planches minces, en particulier des lamelles de parquet - Google Patents

Procédé pour tranches des planches minces, en particulier des lamelles de parquet Download PDF

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Publication number
EP0732180A2
EP0732180A2 EP96103619A EP96103619A EP0732180A2 EP 0732180 A2 EP0732180 A2 EP 0732180A2 EP 96103619 A EP96103619 A EP 96103619A EP 96103619 A EP96103619 A EP 96103619A EP 0732180 A2 EP0732180 A2 EP 0732180A2
Authority
EP
European Patent Office
Prior art keywords
thickness
cutting
board
residual
cutting device
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
EP96103619A
Other languages
German (de)
English (en)
Other versions
EP0732180A3 (fr
EP0732180B1 (fr
Inventor
Siegmar Gönner
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
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 Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik filed Critical Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Publication of EP0732180A2 publication Critical patent/EP0732180A2/fr
Publication of EP0732180A3 publication Critical patent/EP0732180A3/fr
Application granted granted Critical
Publication of EP0732180B1 publication Critical patent/EP0732180B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a method and a system according to the preambles of claims 1 and 7 for cutting thin boards from a square timber. Such a method is used inter alia. used to create thin boards for the top layer of floor covering laminates.
  • the cutting-free production of thin boards from a square timber is known. It is also known that in this method, the thickness of the thin boards produced cannot be determined relatively precisely, as in the sawing of preferably dry wood, since the wood is processed in the moist and preferably also in the heated state and both different wood parameters and also in the cutting processes Machine parameters affect the thickness of a board produced.
  • DE 40 26 346 A1 describes a method in which the residual squared timber remaining after the removal of one or more thin boards is measured in its thickness and then an attempt is made to change the setting of the machine parameters relevant to the cutting thickness in such a way that the residual squared timber thinner as evenly as possible in the remaining number Boards are divided, which are still to be generated from it, so that there is no remaining unusable remaining board.
  • This approach is based on the philosophy of dividing a squared timber completely and loss-free into usable thin boards as the desired goal, whereby possible deviations in the thickness of the thin boards produced are accepted. This is acceptable to a certain extent in processes in which the boards have to be leveled after the drying process following the cutting because of the dimensional changes of the wood that occur.
  • the method is preferably also used in systems with only one cutting device or a sequence of a few cutting devices, for example two machines, in which the squared timber is measured after its passage through one or the small group of cutting devices in terms of its residual thickness, and then by repeated passage to be further divided by the cutting system. With this procedure, there is usually enough time to adjust the cutting devices during the return time of the squared timber, so that the squared timber can then be used again under new conditions.
  • the invention is therefore based on the object of producing lamellae or thin boards leaving the cutting devices for such a process sequence, which already have a high constant thickness.
  • the invention proceeds from the previous aim of converting the residual thickness measured on a squared timber into measures for the further division of this squared timber.
  • the primary goal is to determine the exact thickness of the thin boards produced in each of the cutters. If the board thickness produced by a cutting device deviates from the target thickness, assuming that essentially the same parameters are processed in a production run, the cutting thickness-relevant parameters of this cutting device, as a rule the distance of the knife from the contact surface for the squared timber, corrected in such a way that when thin boards are cut off from subsequent squared timber, boards of nominal thickness or within a predetermined tolerance are again generated.
  • Such a procedure is particularly advantageous if a device, in particular a planing machine, for reducing the thickness of the remaining board leaving the last machine is provided anyway behind a sequence of cutting machines which is intended to completely divide a squared timber in one pass.
  • the aim should be to obtain a board as a residual board, the thickness of which is greater than the target thickness of a board to be produced, so that machining can still take place in the planing machine.
  • a determination of the thickness of the residual squared timber before the last intended cutting process is used to determine how this residual squared timber is to be processed further.
  • the remaining squared timber can be subjected to a further cutting process, whereby the remaining board then has to be discarded because its thickness is below the target thickness of one to generated boards.
  • the occurrence of this condition should be avoided as far as possible, but in such a case a switch to remove residual boards that are no longer acceptable should preferably be provided in front of the planing machine.
  • the system should preferably be designed in such a way that that at least one or more of the cutting devices are designed to pass through a square timber without cutting off a board, or that a residual square timber can be guided past one or more cutting devices via a bypass conveying path.
  • the sequence of the cutting process described here is preferably embedded in an overall process sequence in which the cut thin boards are dried in a manner known per se after cutting to a certain final moisture and are then used as a covering layer for a laminate product, in particular a floor covering, in which one of them is used the top layer composed of the lamellae with base layers of a certain thickness, for example sawn wooden bars, chipboard or the like. is glued under pressure, the lamellae possibly being reworked on their side edges after drying, but preferably in their thickness, as created, are left. This saves a thickness processing step. As already mentioned above, the surface of the lamellar top layer is reworked on the already glued product. The possibility of calibrating the thickness of the slats Grinding after drying, but being able to omit it before further processing, saves material and abrasives.
  • lamellae of the same thickness do not necessarily have to be produced in a sequence of cutting devices.
  • the method according to the invention provides that thin boards of different thicknesses can also be produced, in particular when dividing a squared timber in one pass through a sequence of cutting devices in the individual cutting devices.
  • the production of the thickest desired boards is preferably relocated to the last or the last cutting devices of a sequence, since this reduces the handling difficulties of the remaining squared timber in the cutting machine.
  • the thickness of the lamellae produced in each cutting device is preferably determined by forming the difference from the thickness measurements of the (residual) squared timber entering and leaving a cutting device. Since in a preferred embodiment of the method it makes sense to measure the remaining squared timber in the area of the last of a sequence of cutting devices in each case in order to make decisions about their further processing, it makes sense to provide the difference measurement at least in this area.
  • a thickness measurement on the separated boards themselves can be problematic and expensive because the freshly produced boards have a warp in the form of a curvature and / or twist, so that an alignment of the board surface at the measuring point exactly perpendicular to the direction of action of the sensor cannot be guaranteed . Straightening devices for the boards are not always used.
  • the thickness measurement is preferably carried out in the area of the conveying means which are provided for guiding the (residual) squared timbers. Thickness measuring devices which use the laser beam principle are preferably used.
  • the thickness measurement is expediently carried out at points where the thickness of the conveying means, for example a conveyor belt, is not included.
  • the belt can be made narrower than the width of the squared timber, for example, so that they preferably protrude on each side of the conveyor belt in order to carry out the measurements in these protruding areas, preferably two measurements at a distance from the two side edges of the material to be conveyed respectively.
  • the measuring point can also be arranged at an interruption point in the conveying means. When using a conveyor belt, an interruption point can be created by briefly guiding the conveyor belt away from the conveyed material via deflection rollers, in order then to bring it together again. The point of transition from one funding to another can also be used.
  • the centerpiece of the plant for the production of parquet panels shown in FIG. 1 is the cutting device 1, through which a squared timber or parquet frieze or the residual wood 5 is passed until it is finished.
  • the transport route designated 6 is followed.
  • the system also includes a planing machine 2, a warming tunnel 3 and two thickness measuring devices 4.0 and 4.1.
  • the thickness of the parquet frieze or the residual wood 5 is measured before and after a parquet panel has been cut off. The difference between the measured values gives the actual thickness of the parquet panels, which is discharged from the system at 7. If the actual thickness deviates from the target thickness D, the cutting thickness setting is corrected on the cutting device.
  • the residual wood thickness S is greater than or equal to twice the nominal thickness D of the parquet panels. If the measurement after the cutting device 1 shows that the residual wood thickness S is greater than or equal to twice the nominal thickness D of the parquet panels, a further circulation or cutting process is carried out. If the residual wood thickness S ⁇ 2 D but greater than Dx with Dx> D, the residual wood 5 is fed again to the cutting device 1 and the resulting residual board of thickness (Dx-D) is discarded. If the residual wood thickness S is less than Dx, the residual wood 5 is fed to the planing machine 2 and machined to the desired thickness D in a cutting process. The value Dx is chosen depending on the machine parameters and the type of wood so that a remaining board of the thickness (Dx-D) can still be detected and handled by the cutting device 1 without any problems.
  • the finished parquet panels are removed at 7.2 and the chips are removed from the planing machine 2 at 9.
  • the residual wood thickness S is exactly equal to D
  • the measurement shows a residual wood thickness S ⁇ D
  • the residual wood is discharged at 8 as a reject.
  • a parquet frieze is finished, a new example is introduced from the warming tunnel 3 into the cutting device 1, the necessary control signals also being based on the thickness measurement at 4.2.
  • the parquet panels are produced in a single pass through the parquet frieze or the residual wood 5, n cutting devices and a planing machine 2 being required for the production of n + 1 parquet panels from a parquet frieze. Only three cutting machines are shown, namely the first 1.1, any intermediate stage 1.i and the last 1.n. Correspondingly, the associated thickness measuring devices are designated 4.1, 4.i and 4.n. In addition, a thickness measuring device 4.0 is also provided, with which the thickness of the parquet frieze is determined before entering the first cutting device 1.1. With 7.1, 7.i and 7.n the parquet panels are removed from the system.
  • the last parquet panels 5a are removed from the planing machine 2, regardless of whether the last measured residual wood thickness S is larger or the same size D. In the latter case, there is no longer any cutting thickness reduction. With 9 the removal of the chips and 8 the removal of residual wood with a thickness smaller than D is referred to as a reject. Fresh parquet friezes are fed from the warming tunnel 3 to the first cutting device 1.1. Otherwise, the rest of the wood 5 is processed in principle in the same way as described for the system according to FIG. 1, depending on the thickness measurement.
  • Figure 3 shows a section perpendicular to the transport device.
  • the parquet frieze or residual wood 5 is wider than the conveyor belt 10 so that the thickness measurement by the thickness measuring device 4.0, 4.1 consisting of the transmitter 4a and receiver 4b can take place laterally past the conveyor belt 10.
  • FIG. 4 Another possibility of the interference-free thickness measurement is shown in FIG. 4, in a side view of the area of the thickness measurement device 4.0, 4.1 again consists of transmitter 4a and receiver 4b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Detergent Compositions (AREA)
EP96103619A 1995-03-17 1996-03-08 Procédé pour tranches des planches minces, en particulier des lamelles de parquet Expired - Lifetime EP0732180B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19509653 1995-03-17
DE19509653A DE19509653C1 (de) 1995-03-17 1995-03-17 Verfahren zur Herstellung von dünnen Brettern, insbesondere Parkettlamellen

Publications (3)

Publication Number Publication Date
EP0732180A2 true EP0732180A2 (fr) 1996-09-18
EP0732180A3 EP0732180A3 (fr) 1997-01-15
EP0732180B1 EP0732180B1 (fr) 2000-07-19

Family

ID=7756916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103619A Expired - Lifetime EP0732180B1 (fr) 1995-03-17 1996-03-08 Procédé pour tranches des planches minces, en particulier des lamelles de parquet

Country Status (5)

Country Link
EP (1) EP0732180B1 (fr)
JP (1) JPH0985712A (fr)
AT (1) ATE194791T1 (fr)
CA (1) CA2171508A1 (fr)
DE (2) DE19509653C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2243606B1 (fr) 2009-04-24 2017-02-22 GreCon Dimter Holzoptimierung Süd GmbH & Co. KG Installation de fabrication de plaques en lamelles de bois et procédé destiné à la fabrication de telles plaques

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29703542U1 (de) * 1997-02-27 1997-04-17 Große, Dieter, 27386 Bothel Schablone zum Fräsen von und damit hergestellte Lamellen und/oder Segmenten, insbesondere von Bodenbelägen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026346A1 (de) * 1989-11-01 1991-05-02 Linck Masch Gatterlinck Verfahren zum spanlosen aufteilen eines kantholzes in bretter gleicher dicke
JPH05131401A (ja) * 1991-09-10 1993-05-28 Marunaka Tekkosho:Kk 基材切削装置及び基材切削方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4244310C1 (de) * 1992-12-28 1993-10-28 Linck Masch Gatterlinck Verfahren und Anlage zum schneidenden Aufteilen eines Kantholzes in Bretter vorbestimmter Dicke

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4026346A1 (de) * 1989-11-01 1991-05-02 Linck Masch Gatterlinck Verfahren zum spanlosen aufteilen eines kantholzes in bretter gleicher dicke
JPH05131401A (ja) * 1991-09-10 1993-05-28 Marunaka Tekkosho:Kk 基材切削装置及び基材切削方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2243606B1 (fr) 2009-04-24 2017-02-22 GreCon Dimter Holzoptimierung Süd GmbH & Co. KG Installation de fabrication de plaques en lamelles de bois et procédé destiné à la fabrication de telles plaques

Also Published As

Publication number Publication date
ATE194791T1 (de) 2000-08-15
DE19509653C1 (de) 1996-05-23
EP0732180A3 (fr) 1997-01-15
DE59605614D1 (de) 2000-08-24
JPH0985712A (ja) 1997-03-31
CA2171508A1 (fr) 1996-09-18
EP0732180B1 (fr) 2000-07-19

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