EP1316397A2 - Dispositif pour la fabrication de coupeaux de bois - Google Patents

Dispositif pour la fabrication de coupeaux de bois Download PDF

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Publication number
EP1316397A2
EP1316397A2 EP02022200A EP02022200A EP1316397A2 EP 1316397 A2 EP1316397 A2 EP 1316397A2 EP 02022200 A EP02022200 A EP 02022200A EP 02022200 A EP02022200 A EP 02022200A EP 1316397 A2 EP1316397 A2 EP 1316397A2
Authority
EP
European Patent Office
Prior art keywords
knife
washer
wood chips
screw
wood
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.)
Withdrawn
Application number
EP02022200A
Other languages
German (de)
English (en)
Other versions
EP1316397A3 (fr
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.)
Esterer WD GmbH and Co
Original Assignee
Esterer WD GmbH and Co
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
Priority claimed from DE10160034A external-priority patent/DE10160034B4/de
Application filed by Esterer WD GmbH and Co filed Critical Esterer WD GmbH and Co
Publication of EP1316397A2 publication Critical patent/EP1316397A2/fr
Publication of EP1316397A3 publication Critical patent/EP1316397A3/fr
Withdrawn legal-status Critical Current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
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005—Tools therefor

Definitions

  • the invention relates to a device for producing wood chips made of wood, with one in the predetermined direction the wood guided knife, the knife between one Top of a knife holder and bottom of a washer in each flat system by means of a washer, the knife and the knife holder at least partially penetrating screw is screwed to a threaded section has, and further that by means of the knife from Wood-cut wood chips past the washer to be led.
  • woodchips for tree trunks or to process parts of trees as a whole into wood chips, i.e. without other wood products such as boards and beams are generated.
  • Wood chips are a valuable raw material for paper and cellulose industry. This industry has for the purchase developed evaluation criteria from wood chips, according to which wood chips delivered in different categories Value can be classified. The highest value have wood chips of certain dimensions that are undamaged in their fiber course and no thinly running out Have areas.
  • a strong bend in the wood chips i.e. a generation of wood chips with a curve with a small radius of curvature, however, leads to weakening and possibly in the fiber area also to destruction. This has the consequence that the so generated wood chips into a category of lower value be classified and therefore a lower economic Bring yield.
  • knives have to be cut by those who are interested kind be clamped flat, and that for clamping used elements (screws) must also in immediate Be arranged near the knife edge. Otherwise, namely the knife is strongly bent and, since it is made of hard metal is break very soon.
  • the invention is therefore based on the object of a device of the type mentioned in further training in that the disadvantages mentioned above are avoided.
  • the screw has a head and the head is in screwed state of the screw in a recess of the Knife holder arranged.
  • This measure has the advantage that conventional machine screws can be used to bond the washer, Screw the knife and knife holder together can.
  • the washer on its facing the wood chips Side with a guide surface for the wood chips Mistake.
  • the guide surface is preferably against the predetermined one Direction inclined by an angle that is such that a Line of curvature of the wood chips passed by the guide surface has a minimum radius of curvature that is larger as a predetermined value.
  • This measure has the advantage that the known guide surface on the washer with regard to its angle of inclination can be dimensioned flatter, so that accordingly the minimum radius of curvature of the line of curvature increases.
  • this in turn means that the Wood chips should not be excessively bent when they are produced and thus maintain their high strength. This is from of particular importance when using such chips in composite components, the strength of which, among other things significantly influenced by the strength of the wood chips themselves becomes.
  • the device is a conical head Surface formed into which a plurality of knife holders is welded in.
  • the invention is particularly suitable if the knife has a Speed of about 40 m / s is feasible, preferably with a speed between 35 and 45 m / s.
  • FIG. 1 and 2 are the same components with the same reference numerals Mistake. Where, according to the invention, modifications in FIG. 2 compared to the state shown in Fig. 1 Technique are shown, the reference numerals are each an "a" been added.
  • 10 denotes a tree trunk in total or the like, i.e. a piece of wood, from the wood chips 12 are to be separated so that a surface 14 on the tree trunk 10 arises.
  • a typical application is the side one Flattening tree trunks 10 as part of a profiling or a cut of a tree trunk.
  • a knife 16 is provided for separating the chips 12, the cutting edge 18 of the wood chips 12 from the tree trunk 10 cuts. With 20 a minor cutting edge is referred to Separate the chips 12 in the transverse direction, that is, vertically to the drawing level in Fig. 1, is used.
  • the direction of movement of the knife 16 relative to the tree trunk 10 is marked with an arrow 22. This represents at the same time the speed at which the knife 16 moved through the tree trunk 10. This speed is in the Range of 40 m / s, preferably in the range between 35 and 45 m / s.
  • the knife 16 is held in a knife holder 30.
  • the knife holder 30 has an inclined, flat surface 32 the knife 16 rests flat, with one as well flat underside 34.
  • on an upper side 36 of the knife 16 is an underside 38 of a washer 40, which in the technical term is also referred to as "chip breaker".
  • chip breaker which in the technical term is also referred to as "chip breaker".
  • a through bore 42 is in the washer 40 intended. This is aligned with an elongated hole 44 in the knife 16 and with a threaded bore 46 in the knife holder 30.
  • a double arrow 48 indicates that the knife 16 is closed Adjustment purposes or to adjust the depth of cut relatively slidable to the washer 40 and the knife holder 30 is.
  • the mechanical cohesion is brought about by a screw 50, through the through hole 42 and the elongated hole 44 inserted and with a threaded portion 56 in the threaded bore 46 is screwed.
  • a head 52 of the screw 50 lies partially inside a recess 54 in the washer 40th
  • the washer 40 is on the wood chips 12 facing side with a guide surface 58.
  • the wood chips 12 cut from the tree trunk 10 by means of the knife 16 are bent away from the tree trunk 10.
  • the chips 12 move along a line of curvature 62, the minimum radius of curvature of which is denoted by r in FIG. 1.
  • the chips 12 run downstream of the cutting edge 18 onto the guide surface 58, which is at an angle with respect to the cutting direction (arrow 22) is employed.
  • the invention provides a remedy here by the known arrangement 1 is modified as shown in FIG. 2 is.
  • the knife holder 30a is first modified in such a way that that the recess 54a for the head 52a of the screw 50a 2 is located on the underside of the knife holder 30a and not in the washer 40a.
  • the screw 50a screwed in from below, which means that the through hole 42a in the knife holder 30a and the threaded bore 46a in the washer 40a.
  • the threaded portion is 56a thus screwed into the threaded bore 46a in the washer 40a, with the result that no elements of the screw 50a Extend above washer 40a.
  • the guide surface 58a on the washer 40a can be at an angle a little flatter. This leads to a line of curvature 62a of the chips 12a, the minimum radius of curvature R of which is greater than the radius of curvature r in the device according to FIG. 1.

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)
EP02022200A 2001-11-30 2002-10-04 Dispositif pour la fabrication de coupeaux de bois Withdrawn EP1316397A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10159681 2001-11-30
DE10159681 2001-11-30
DE10160034 2001-12-03
DE10160034A DE10160034B4 (de) 2001-11-30 2001-12-03 Vorrichtung und Verfahren zum Erzeugen von Hackschnitzeln aus Holz

Publications (2)

Publication Number Publication Date
EP1316397A2 true EP1316397A2 (fr) 2003-06-04
EP1316397A3 EP1316397A3 (fr) 2007-11-07

Family

ID=26010714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02022200A Withdrawn EP1316397A3 (fr) 2001-11-30 2002-10-04 Dispositif pour la fabrication de coupeaux de bois

Country Status (1)

Country Link
EP (1) EP1316397A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516510B1 (de) * 2015-02-13 2016-06-15 Christian Brandl Vorrichtung und Verfahren zur Herstellung eines profilierten und in seiner Höhe definierten Holzspanes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528304A1 (de) * 1965-01-14 1970-10-08 Brundell & Johnsson Ab Zerspanungsmaschine
FR2096228A5 (fr) * 1970-06-12 1972-02-11 Pitea Maskin Industri
US4610928A (en) * 1982-09-27 1986-09-09 Arasmith Stanley D Curved high absorbancy wood flake
US6293481B1 (en) * 1999-11-23 2001-09-25 Anders T. Ragnarsson Attachment arrangement facilitating rapid replacement of strikers of a wood comminuting rotor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1528304A1 (de) * 1965-01-14 1970-10-08 Brundell & Johnsson Ab Zerspanungsmaschine
FR2096228A5 (fr) * 1970-06-12 1972-02-11 Pitea Maskin Industri
US4610928A (en) * 1982-09-27 1986-09-09 Arasmith Stanley D Curved high absorbancy wood flake
US6293481B1 (en) * 1999-11-23 2001-09-25 Anders T. Ragnarsson Attachment arrangement facilitating rapid replacement of strikers of a wood comminuting rotor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516510B1 (de) * 2015-02-13 2016-06-15 Christian Brandl Vorrichtung und Verfahren zur Herstellung eines profilierten und in seiner Höhe definierten Holzspanes
AT516510A4 (de) * 2015-02-13 2016-06-15 Christian Brandl Vorrichtung und Verfahren zur Herstellung eines profilierten und in seiner Höhe definierten Holzspanes

Also Published As

Publication number Publication date
EP1316397A3 (fr) 2007-11-07

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