EP1237688A2 - Dispositif de production d'un copeau de bois, ainsi que dispositif servant a profiler un tronc d'arbre - Google Patents

Dispositif de production d'un copeau de bois, ainsi que dispositif servant a profiler un tronc d'arbre

Info

Publication number
EP1237688A2
EP1237688A2 EP00985092A EP00985092A EP1237688A2 EP 1237688 A2 EP1237688 A2 EP 1237688A2 EP 00985092 A EP00985092 A EP 00985092A EP 00985092 A EP00985092 A EP 00985092A EP 1237688 A2 EP1237688 A2 EP 1237688A2
Authority
EP
European Patent Office
Prior art keywords
saw blade
wood
circular saw
tree trunk
axis
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
EP00985092A
Other languages
German (de)
English (en)
Other versions
EP1237688B1 (fr
Inventor
Hans Dietz
Jürgen EDELMANN
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.)
Dietz Hans Prof Dr
Original Assignee
Dietz Hans Prof Dr
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 Dietz Hans Prof Dr filed Critical Dietz Hans Prof Dr
Priority to DK00985092T priority Critical patent/DK1237688T3/da
Publication of EP1237688A2 publication Critical patent/EP1237688A2/fr
Application granted granted Critical
Publication of EP1237688B1 publication Critical patent/EP1237688B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/007—Combined with manufacturing a workpiece

Definitions

  • the invention relates to a device for producing a substantially wedge-shaped woodchip, in which the woodchip is machined from the wood by means of a chipping tool that can be rotated about a first axis in such a way that it has a first, concave surface and a second, convex surface, which is between them limit the wood chips.
  • the invention also relates to a device for profiling a tree trunk, with a chipping tool rotatable about a first axis for chipping longitudinal corners out of the tree trunk, with means for sawing off side boards from the tree trunk, one narrow side of which is formed by one edge surface of the corner, and with a circular saw blade to make a saw cut along the other edge surface before removing the corners.
  • chipping tools In woodworking technology, it is generally known to cut wood in whole or in part by means of so-called chipping tools.
  • the chipper tools are usually rotating tools with chipper knives on their circumference.
  • the chipper tools are usually arranged fixed in space, and the wood to be chipped or chipped is guided along the chipper head in the axial direction of the wood.
  • the wood chips produced have a wing-like shape with an essentially wedge-shaped cross section.
  • the wood chips are delimited on their two large surfaces by a concave or convex side, these sides leading from a thick end of the wood chip to a thin end or, in the cross-sectional representation, of a tip in which the two surfaces run tangentially into one another.
  • Wood chips are a valuable raw material in various branches of industry. This includes the pulp industry, the paper industry, but also the manufacturers of wood-based materials and so-called composite components, ie Panels, boards and beams made by gluing wood chips.
  • Wood chips of medium size are particularly preferred because wood chips that are too large are difficult to process and that wood chips that are too small or too thin lead to losses or to no viable structures, particularly in the production of pulp, paper, wood-based materials and composite components.
  • wood chips are produced by means of a rotating chipping tool in the manner described in more detail above, they have the thinly tapering end along their wedge-shaped cross section. This thin end is a disadvantage for the further processing of the wood chips, because this thin end either dissolves in the pulp or leads to areas that are not very stable in the production of composite components. In practice, wood chips are produced either when wood is completely cut or when wood is partly cut out.
  • a partial removal of wood takes place e.g. when profiling tree trunks. This means the all-round processing of initially raw tree trunks in order to give them a cross-sectional shape (profile), in which the profiled tree trunk can be easily broken down into boards and beams by subsequent sawing.
  • a corresponding method and a corresponding device are e.g. described in DE 29 28 949 A.
  • the tree trunks are processed during profiling by means of so-called corner cutters, which mill corners out of the tree trunk in the axial direction, so that the tree trunk, which was flattened on all sides before or after, is given a profile in which so-called side boards can be sawn off.
  • a corresponding method and a corresponding device are described in DE 37 02 980 C2.
  • a first, for example horizontal saw cut of predetermined depth is first made from one side of a tree trunk, in which case the axis of rotation of the saw blade runs vertically.
  • a section of the wood above the saw cut is removed, with the axis of rotation of the chipping tool, or in the case of a combined tool head, the common axis of rotation, vertical runs. The removed area does not reach as far horizontally into the tree trunk as the first saw cut is deep.
  • EP 0 770 461 A2 discloses a method and a plant for dividing tree trunks into smaller wood products.
  • a tree trunk is profiled by first sawing the corners completely using circular saw blades whose axes are inclined at 90 ° to one another. When sawing out, strips are created that are removed from the actual profiling system and completely cut in a separate chipper.
  • a method for processing tree trunks is known from EP 0 775 558 AI.
  • a longitudinal cut is first made through the tree trunk using a band saw running in the vertical direction, alternatively also Circular saws are proposed.
  • the saw cut is in any case placed in a vertical plane so that it separates a side board from the tree trunk.
  • the saw blade is followed by a separating element in the sawn gap, with which the side board, which is still materially connected to the tree trunk, is kept at a distance from the remaining main goods.
  • the separating element in turn is followed by a combined trimming tool, which can be rotated about a vertical axis and, in the manner already described, consists of a chipper and a circular saw blade connected to it.
  • the corner area above the narrow side of the side board to be produced is machined and at the same time the narrow side of the side board is machined with a high-quality surface using the circular saw blade.
  • the cutting knife and the circular saw blade have the same radius in the cutting tool.
  • the flight circle runs tangentially to the broad side of the separated side board, in other words, the saw teeth and the chipper blades do not run into the gap created by the leading band saw. Even if, in this known method, the flight circle of the span knife would extend into the gap, this would be irrelevant in connection with the present invention, because band saws are known to produce only extremely narrow sawing joints, which are typically a maximum of 3 mm wide. This would only affect the outermost tips of the chips. However, this would only result in an economically insignificant change in the shape of the chips. With this known method, the "comma chips" already mentioned are generated in principle.
  • side boards are sawn from a tree trunk flattened at the side, which are still provided with forest edges at their edges. These side boards are bent out of the sawing plane as long as they are still materially connected to the tree trunk at the leading end and then run essentially parallel to the tree trunk at a distance. In this spaced-apart position, the side boards are machined on the narrow sides by means of a trimmer and thus trimmed. The cutting edges of the edger chipper run through the wood in the area of the forest edges at a radial pressure angle of approx. 45. The side boards thus run past the edger chipper almost in the area of the axis of rotation. This is possible because, as mentioned, the side boards are currently spaced from the main goods.
  • the known method and the known device thus have the advantage of producing chips which are more favorable for subsequent processing in the cellulose industry are, but this advantage must be bought with considerable additional effort because the side boards after sawing out of the sawing plane and must be trimmed there at a considerable distance from the main goods. This is not possible with all types of wood, at least not without damaging the side boards when bending in the fiber.
  • the invention is based on the object of developing a wood chip and method and devices of the type mentioned at the outset or of specifying the uses mentioned in order to avoid the disadvantages mentioned above.
  • wood chips should be produced in an economically optimal manner, the shape of which corresponds as closely as possible to those classes of wood chips that are most highly paid for by the processing industry
  • the object is achieved in that the first axis runs horizontally and in that a circular saw blade rotatable about a second, vertical axis is provided in order to remove the wood in the area prior to the removal , in which the surfaces converge in an imaginary tip.
  • the object is achieved in that the circular saw blade is rotatable about a vertical axis, and that the cutting tool with its radius of the circle extends into the gap created by the saw cut, such that it is empty therein running.
  • the object underlying the invention is completely achieved in this way.
  • the invention provides for this thinly tapering end to be removed, so that only the thicker end of the chips remains.
  • Such a shortened wood chip has a much higher economic value and can therefore be processed in a much better way.
  • the operator of a sawmill system can therefore expect a much higher economic yield during the recycling of the chips with such shaped chips.
  • the circular saw blade is not used according to the invention for separating a side board, but rather only for creating a gap of finite depth.
  • the circular saw blade is preferably formed with a thickness of more than 5 to 6 mm.
  • the circular saw blade is preferably followed by a riving knife which is arranged between the circular saw blade and the chipping tool. This measure opens up the possibility of preparing the wood to be chipped or chipped in one and the same work step by means of a cut, in particular a saw cut, in such a way that the shortened wood chips mentioned arise immediately when the rotating chipper tool is subsequently engaged, since the area has already been removed beforehand, in which the tapered ends or tips would have been produced.
  • Figure 1 is a sectional view through a wood chip, as it is produced with conventional chipping tools.
  • FIG. 2 shows an illustration, similar to FIG. 1, but for a wood chip produced in accordance with the invention
  • FIG. 3 shows a schematic, radial cross-sectional illustration of a tree trunk to explain a profiling process
  • Fig. 4 and 5 are extremely schematic views of a device for producing wood chips of a conventional type
  • FIG. 6 shows an illustration, similar to FIG. 5, but on an enlarged scale and with a different axis arrangement, illustrating an embodiment of an apparatus according to the invention for producing wood chips according to the invention when profiling tree trunks;
  • 10 denotes a woodchip of a conventional type.
  • the woodchip 10 has two sides or surfaces 12, 14 which are perpendicular to the plane of the drawing and form the essential surface of the woodchip 10.
  • the left surface 12 in FIG. 1 is concave, and the right surface 14 is convex.
  • the surfaces 12 and 14 converge tangentially at the bottom in FIG. 1 in a tip 16 or edge.
  • a preferably flat end face 18 can be seen at the opposite end of the chips 10.
  • the wood chips 10 thus have a thick end 20 and a thin end 22.
  • the position of the parting plane 24 within the woodchip 10 can be determined in different ways.
  • economic considerations are of primary importance, i.e. the question in which remaining shape of the woodchips 10 'offers the best economic yield.
  • a center line 26 between the surfaces 12 and 14 then for example the center line section 26a within the remaining wood chip 10 'with a length l x and the imaginary center line section 26b outside the remaining wood chip 10', namely up to the tip 16, Define with a length of 1 2 , the total length of the original wood chip being 10 l x + 1 2 .
  • An optimal position of the parting plane 24 is, for example, when 1 2 is between 40% and 100% of 1 1 .
  • Another possible definition is in the transition from the convex surface 14 to one Boundary surface 28 along the parting plane 24 to define the thickness d of the remaining wood chips 10 'with, for example, between 2 and 10 mm.
  • the interface 28 forms an acute angle ⁇ with the center line 26, which e.g. can be between 15 ° and 50 °.
  • the flat end face 18 is produced by machining or sawing and the interface 28 by sawing in the axial direction. They are therefore flat and run parallel to each other.
  • the essentially circular radial section through a tree trunk is indicated by dash-dotted lines.
  • the so-called rinds 32 are located on the side of the tree trunk 30, i.e. Surface sections affected by forest edges.
  • So-called corners 34 are provided at four circumferential positions of the tree trunk 10, each offset by 90 ° to one another.
  • rinds 32 usually by machining
  • corners 34 usually by milling or chipping
  • Corners 34 a corner mill 44, generally speaking a rotating chipping tool, is used.
  • the corner milling cutter 44 can be rotated about a vertical axis 46 in the direction of an arrow 48.
  • the axis 46 runs perpendicular to the longitudinal axis of the horizontally aligned tree trunk 30.
  • the corner milling cutter 44 is composed in a manner known per se from two tools, namely a chipper 50 and a saw blade 52 or a corresponding number of planing knives.
  • the knives of the chipper 50 dip into the corner 34 in the region of the first edge surface 38, while at the same time the second edge surface 40 of the corner 34 is treated by the saw blade 52 or the planing knives.
  • the second edge surface 40 receives a relatively high (sawn) surface quality, while the first edge surface 38 receives a wavy surface due to the rotary knife rotating with a rotary movement.
  • FIG. 5 shows a top view of the arrangement according to FIG. 4.
  • the arrow 54 indicates the rotary movement of the corner milling cutter 44 rotating around the vertical axis 48. Its radius is denoted by r.
  • An arrow 56 indicates the direction of advance of the tree trunk 30 relative to the corner milling cutter 44 which is mounted in a fixed position (or vice versa).
  • the plan view according to FIG. 5 also shows a flattened area 58 on the tree trunk 30, where the corresponding rind 32 has previously been removed by flattening it sideways has been.
  • the flattened area 58 is separated by an axially extending transition line 60 from the remaining forest-edged area 62, in which the corner 34 is to be worked out by means of the corner mill 44.
  • the orientation of the axis 46 'of the corner milling cutter 44 is first changed. According to the invention, this runs horizontally. Furthermore, a circular saw blade 70, which rotates about a vertical axis 72, is arranged in front of the revolving corner milling cutter 44, as indicated by an arrow 74. The axis 72 runs perpendicular to the longitudinal axis of the tree trunk 30, which in turn is aligned horizontally. The circular saw blade 70 thus saws a horizontal gap 76 of finite depth d (FIG. 7D) along the transition line 60.
  • the circular saw blade 70 typically has a thickness of more than 5 mm, preferably 6 mm and more, so that the gap 76 is correspondingly wide, at least considerably wider than in the case of a band saw. Depending on the individual case, the circular saw blade 70 can also be provided with particularly wide teeth.
  • a circular wedge 78 can follow the circular saw blade 70 and ends in the axial direction where the engagement area of the corner milling cutter 44 begins.
  • the arrangement is such that the gap 76 lies where the thin end 22 of the chips would lie in the conventional procedure (FIG. 5). Since the wood already there is already present in this area through the circular saw blade 70 has been removed, the cutter blades of the cutter 50 of the corner milling cutter 44 run empty, as does the saw blade 52 or the planing blades.
  • the wood chips 10 ′ are produced without the thinner end 22, ie they only consist of the thicker end 20.
  • the circular saw blade 70 is only to be understood as an example in this respect, and that other cutting tools can of course also be used, e.g. the width of the gap 76 should be larger.
  • the procedure shown in FIG. 6 also has the advantage that the first edge surface 38 'is also designed with a saw-quality surface from the outset.
  • FIGS. 7A to 7D again illustrate the sequence of the processing steps in the device according to FIG. 6 in four pictures.
  • FIG. 7A shows the moment at which the circular saw blade 70 (vertical axis of rotation 72) rotating in a horizontal plane dips laterally into the tree trunk 30a.
  • FIG. 7B shows that the circular saw blade 70 has created the horizontal gap 76 of finite width d in the tree trunk 30b.
  • FIG. 7C shows the corner milling cutter 44, which is now engaged on the tree trunk 30c, and which rotates about the horizontal axis 46 '. rotates.
  • the corner mill 44 cuts out the chips 10 'in a shape according to FIG. 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Details Of Cutting Devices (AREA)
  • Formation And Processing Of Food Products (AREA)

Abstract

La présente invention concerne un dispositif permettant de produire un copeau de bois (10') sensiblement biseauté, associé en particulier au profilage de troncs d'arbres. Le copeau de bois (10') est découpé du bois au moyen d'un outil d'enlèvement de copeaux (44), pouvant tourner autour d'un premier axe (46), de sorte qu'il présente une première surface concave (12) ainsi qu'une deuxième surface convexe (14) qui constituent les limites du copeau de bois (10'). Le premier axe (46) est horizontal. Une lame de scie circulaire (70), pouvant tourner autour d'un deuxième axe (72) vertical, sert, avant l'enlèvement de copeau, à éliminer le bois se trouvant dans la zone dans laquelle les surfaces (12, 14) se rejoignent en une pointe imaginaire (16).
EP00985092A 1999-12-15 2000-11-25 Dispositif de production d'un copeau de bois Expired - Lifetime EP1237688B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK00985092T DK1237688T3 (da) 2000-11-25 2000-11-25 Anordning til fremstilling af en flis

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19960319A DE19960319C1 (de) 1999-12-15 1999-12-15 Vorrichtung zum Erzeugen eines Hackschnitzels sowie Vorrichtung zum Profilieren eines Baumstammes
DE19960319 1999-12-15
PCT/EP2000/011756 WO2001043927A2 (fr) 1999-12-15 2000-11-25 Dispositif de production d'un copeau de bois, ainsi que dispositif servant a profiler un tronc d'arbre

Publications (2)

Publication Number Publication Date
EP1237688A2 true EP1237688A2 (fr) 2002-09-11
EP1237688B1 EP1237688B1 (fr) 2005-02-09

Family

ID=7932645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00985092A Expired - Lifetime EP1237688B1 (fr) 1999-12-15 2000-11-25 Dispositif de production d'un copeau de bois

Country Status (7)

Country Link
US (1) US6719022B2 (fr)
EP (1) EP1237688B1 (fr)
AT (1) ATE288817T1 (fr)
CA (1) CA2391804C (fr)
DE (2) DE19960319C1 (fr)
ES (1) ES2236016T3 (fr)
WO (1) WO2001043927A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051933A1 (de) * 2004-10-25 2006-05-04 Gebrüder Linck Maschinenfabrik "Gatterlinck" GmbH & Co KG Vorrichtung und Verfahren zum Profilieren von Baumstämmen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934630A (en) * 1973-04-16 1976-01-27 Cockle Roy R Method and apparatus for producing rough cut lumber
DE2918622C2 (de) * 1979-05-09 1981-11-19 Gebrüder Linck Maschinenfabrik und Eisengießerei Gatterlinck, 7602 Oberkirch Verfahren und Vorrichtung zur spanenden Zerlegung von Baumstämmen in allseitig bearbeitete Holzerzeugnisse
DE2928949C2 (de) * 1979-07-18 1981-10-01 Gebrüder Linck Maschinenfabrik und Eisengießerei Gatterlinck, 7602 Oberkirch Verfahren und Vorrichtung zur spanenden Zerlegung von Baumstämmen in allseitig bearbeitete Holzerzeugnisse
DE3244393C1 (de) * 1982-12-01 1984-03-01 Wurster u. Dietz GmbH u. Co Maschinenfabrik, 7400 Tübingen Verfahren zum Herstellen von allseitig bearbeiteten Holzerzeugnissen sowie Vorrichtung zur Durchfuehrung des Verfahrens
DE3702890A1 (de) * 1986-02-27 1987-09-03 Linck Masch Gatterlinck Verfahren und vorrichtung zur spanenden zerlegung von baumstaemmen in allseitig bearbeitete holzerzeugnisse mittels profilzerspanung
SE470378B (sv) * 1991-06-17 1994-02-07 Ari Ab Sätt och anordning för sönderdelning av stock till bräder och plank
DE4337682C1 (de) * 1993-11-04 1995-05-04 Dietz Hans Prof Dr Verfahren und Vorrichtung zum Zerlegen eines Baumstammes
SE510101C2 (sv) * 1995-10-24 1999-04-19 Soederhamns Verkstaeder Ab Förfarande och anläggning för delning av stockar i smärre virkesstycken
FI99096C (fi) * 1995-11-24 1997-10-10 Kauko Rautio Menetelmä puunrungon käsittelemiseksi lastuamalla
SE514304C2 (sv) * 1997-10-10 2001-02-05 Ari Ab Anordning och förfarande för bearbetning av en timmerstock
DE19829112C1 (de) * 1998-06-30 2000-03-30 Esterer Wd Gmbh & Co Hackschnitzel, Verfahren und Vorrichtung zum Erzeugen eines Hackschnitzels sowie zum Profilieren eines Baumstammes und deren Verwendungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0143927A2 *

Also Published As

Publication number Publication date
DE19960319C1 (de) 2001-07-26
US20030005976A1 (en) 2003-01-09
DE50009510D1 (de) 2005-03-17
EP1237688B1 (fr) 2005-02-09
US6719022B2 (en) 2004-04-13
CA2391804A1 (fr) 2001-06-21
WO2001043927A2 (fr) 2001-06-21
ATE288817T1 (de) 2005-02-15
WO2001043927A3 (fr) 2001-12-20
CA2391804C (fr) 2007-04-03
ES2236016T3 (es) 2005-07-16

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