EP0052670A1 - Process and device for producing flat shavings - Google Patents

Process and device for producing flat shavings Download PDF

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Publication number
EP0052670A1
EP0052670A1 EP80107400A EP80107400A EP0052670A1 EP 0052670 A1 EP0052670 A1 EP 0052670A1 EP 80107400 A EP80107400 A EP 80107400A EP 80107400 A EP80107400 A EP 80107400A EP 0052670 A1 EP0052670 A1 EP 0052670A1
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EP
European Patent Office
Prior art keywords
chip
wood
knife
fiber
knives
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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.)
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Application number
EP80107400A
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German (de)
French (fr)
Inventor
Karl-Heinz Köstermeier
Wilhelm Pallmann
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KOSTERMEIER KARL HEINZ
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KOSTERMEIER KARL HEINZ
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Priority to EP80107400A priority Critical patent/EP0052670A1/en
Publication of EP0052670A1 publication Critical patent/EP0052670A1/en
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
    • B27G13/04—Securing the cutters by mechanical clamping means

Definitions

  • the invention relates to a method for producing flat wood chips from round, log or industrial waste wood using a rotating cutting body provided with strip knives and to an apparatus for performing this method.
  • Such methods and devices are widely known.
  • a knife shaft for producing flat wood chips is known, which is provided with a double comb knife.
  • a knife shaft for wood-cutting machines is known, which is provided with so-called comb knives.
  • DE-PS 16 53 090 a wood cutting machine is known which with strip knives cutting on gaps, i.e. so-called profile knives is provided, while a knife shaft with a double-comb knife is known from DE-OS 27 21 930.
  • Strip knives with integrated scribing tips or with separate scribing tips for wood cutting are also known.
  • chip removal and chip removal are common to all these known devices for wood cutting.
  • special shapes of the knives or separate cutters are therefore necessary, with corresponding wood supports being provided in the separating cut which is produced by the shape of the knives or by separate cutters transverse to the grain of the wood.
  • the invention solves the problem of creating a method and an apparatus for performing this method, with which on be; in a particularly simple manner, a high, uniform chip quality is achieved with a low proportion of fine material and the chips can be divided into both the longitudinal and the transverse fiber directions.
  • the advantages achieved by the invention are essentially to be seen in the fact that the splitting of a chip in the longitudinal and transverse directions of the fibers is made possible, a normal straight strip knife without protruding serrated noses being used for the peeling process of the chip and the size and type of the conventional recess within the knife shaft for the reception of knives, knife holders and centrifugal wedge remains unchanged. Furthermore, the chip length in the cross fiber direction can be easily adjusted.
  • Chip cutters 3 are used within a knife holder 2 and are assigned to one another at a distance of the desired fiber length of the chips.
  • the width 9 of the chip separator 3 depends on the chip thickness and the type of wood. However, both parameters vary with one another, the preferred width of the chip separator being in the range from approximately 3 to 6 mm.
  • the position of the chip separator 3 in relation to the flight circle of the knife edge 4 is defined by the distance 13, which results from the chip thickness plus the wear portion of the knife edge 4 within a knife service life.
  • the chip separator 3 advantageously stands behind this knife edge 4 by this distance and thus lies flush against the knife shaft jacket 5.
  • the wear on the chip breaker that occurs within a service life does not impair the function, since there is also sufficient functional reliability if the distance between the knife shaft jacket 5 and the chip breaker 3 is at least 3 mm.
  • the chip separator is functional as long as there is a full contact between the chip separator and the chip discharge side of the knife 6.
  • the separating function of the chip separator 3 is supported by profiles on the side of the chip separator 3 facing the wood, as shown in FIGS. 3, 4 and 5.
  • FIG. Width and full contact on the chip discharge side of the knife is important for the functionality of the chip separator. With this arrangement it is easily possible to separate the chip transversely to the fiber direction.
  • the size of the angle ⁇ to the cutting edge of the knife which is decisive for the length of the chip perpendicular to the fiber direction, is selected as a function of the bevel cutting angle ⁇ .
  • a separation of the chip in the transverse direction of the fiber is made possible in that the chip exits at the same angle to the cutting edge of the knife as the wood has previously hit the knife.
  • the right side of the chip leads the amount of the edge to the angle ß of the oblique position of the knife in relation to the left side of the chip.
  • the chip With increasing chip length, the chip is deflected within the chip pocket along the chip path 8 by the chip separator 3.
  • a shifting force occurs in the direction of arrow 7, the counterforce of which is given by the strength of the wood or the binding of the fibers to one another.
  • the displacement force represented by the arrow 7 becomes greater than the binding of the fibers of the chip to one another, so that the chip breaks open in the direction of the fiber.
  • the displacement force or the increase in the displacement force increases in connection with the chip length, the magnitude of the displacement force can be reduced to zero by changing the angle ⁇ .
  • the result of this arrangement is a chip, the length of which in the transverse direction of the fiber is equal to the maximum possible cutting length in the wood to be cut.
  • an angle ⁇ must be selected which is less than 90 °.
  • the size of this angle is determined by the minimum chip length in the fiber longitudinal direction 11 and the minimum dimension of the required chip pocket, the width of which is designated by 10 in the direction of travel of the chip, for the trouble-free drainage of the cut chip. Particularly fine chips are achieved if the angle ⁇ does not fall below the range of 30 °. 13 in FIG. 1 also indicates the chip thickness plus the expected wear of the knife. Furthermore, the arrow in FIG. 2 denotes 12, which indicates the running direction of the knife shaft 1.
  • the chip separator 3 Due to the position of the chip separator 3, there are new possibilities with regard to wear due to the chip separation in the transverse direction of the fibers. Since the chip breaker does not protrude from the knife circle, hard metals and oxide ceramics can be used. The chip breaker itself can be held in the knife holder 2 releasably or non-releasably. Even an adjustment in the direction of the knife edge 4 for possible wear on the Compensating the side of the chip breaker facing the wood is possible with the conventional means.
  • the centrifugal wedge belonging to the knife holder 2 with chip separator 3 has wooden supports, the size and position of which depend on the size and position of the chip separator. However, it is also entirely possible to dispense with a knife holder entirely and to arrange the chip separators in the centrifugal wedge itself.
  • the invention thus achieves particularly good and uniform chip thicknesses, since protruding cutting elements which protrude beyond the flight circle of the knives are dispensed with and the wood is not unnecessarily set in motion. Even thin woods can be machined with excellent chip quality. In addition, the proportion of fines is particularly low due to the lack of separating cuts; the use of strip knives in the simplest version reduces the knife costs per machine. Another advantage is that when the parts according to the invention are installed in conventional knife shafts, they do not have to be changed.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Abstract

Process and device for producing flat wood shavings from round wood, billet wood or industrial waste wood, wherein a rotating cutting body is provided with strip knives (6) and also with shaving separators (3) which are arranged below the cutting edge of the strip knife (6) and adjacent to the latter, the shaving separators (3) either terminating flush with the shell for the rotating cutting body or protruding in relief from the latter. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung flächiger Holzspäne aus Rund-, Scheit- oder Industrierestholz unter Verwendung eines rotierenden mit Streifenmessern versehenen Schneidkörpers sowie auf eine Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for producing flat wood chips from round, log or industrial waste wood using a rotating cutting body provided with strip knives and to an apparatus for performing this method.

Derartige Verfahren und Vorrichtungen sind vielfältig bekannt. So ist aus dem DE-GM 77 15 433 eine Messerwelle zur Erzeugung flächiger Holzspäne bekannt, die mit einem Doppelkamm-Messer versehen ist. Aus der DE-OS 23 45 961 ist eine Messerwelle für Holzzerspanungsmaschinen bekannt, die mit sogenannten Kamm-Messern versehen ist. Ferner ist aus der DE-PS 16 53 090 eine Holzzerspanungsmaschine bekannt, die mit auf Lücke schneidenden Streifenmessern, d.h. sogenannten Profilmessern, versehen ist, während aus der DE-OS 27 21 930 eine Messerwelle mit einem Doppelkamm-Messer bekannt ist.Such methods and devices are widely known. From DE-GM 77 15 433 a knife shaft for producing flat wood chips is known, which is provided with a double comb knife. From DE-OS 23 45 961 a knife shaft for wood-cutting machines is known, which is provided with so-called comb knives. Furthermore, from DE-PS 16 53 090 a wood cutting machine is known which with strip knives cutting on gaps, i.e. so-called profile knives is provided, while a knife shaft with a double-comb knife is known from DE-OS 27 21 930.

Ferner sind Streifenmesser mit integrierten Ritzerspitzen oder mit separaten Ritzerspitzen zur Holzzerspanung bekannt.Strip knives with integrated scribing tips or with separate scribing tips for wood cutting are also known.

Allen diesen bekannten Vorrichtungen zur.Holzzerspanung sind die Funktionen des Spanabschälens und des Spanteilens gemeinsam. Um eine Spanteilung quer zur Faserrichtung des Holzes zu vermöglichen, sind deshalb spezielle Formgebungen der Messer oder separate Ritzer erforderlich, wobei entsprechende Holzabstützungen im Trennschnitt vorgesehen sind, der durch die Formgebung der Messer oder durch separate Ritzer quer zur Faserrichtung des Holzes erzeugt wird.The functions of chip removal and chip removal are common to all these known devices for wood cutting. In order to enable chip splitting transversely to the grain of the wood, special shapes of the knives or separate cutters are therefore necessary, with corresponding wood supports being provided in the separating cut which is produced by the shape of the knives or by separate cutters transverse to the grain of the wood.

Alle diese bekannten Schneidelemente weisen noch den Nachteil auf, daß bei fehlender Holzabstützung im Trennschnitt das Holz in die Spantasche gezogen wird und zu unkontrollierbaren Spandicken zerspant wird. Ferner ist die spezielle Formgebung der mit den Ritzern versehenen Messer mit besonderen Kosten verbunden.All these known cutting elements still have the after Part of the fact that if there is no wood support in the separating cut, the wood is pulled into the chip pocket and cut to uncontrollable chip thicknesses. Furthermore, the special shape of the knives provided with the cuts is associated with special costs.

Die Erfindung, wie sie in den Ansprüchen gekennzeichnet ist, löst die Aufgabe,ein Verfahren und eine Vorrichtung zur Durchführung dieses Verfahren zu schaffen, mit denen auf be; sonders einfache Art und Weise eine hohe gleichmäßige Span-' qualität bei geringem Feingutanteil erzielt wird und wobei die Späne sowohl in Faserlängs- als auch in Faserquerrich- tung aufteilbar sind.The invention, as characterized in the claims, solves the problem of creating a method and an apparatus for performing this method, with which on be; in a particularly simple manner, a high, uniform chip quality is achieved with a low proportion of fine material and the chips can be divided into both the longitudinal and the transverse fiber directions.

Die durch die Erfindung erreichten Vorteile sind im wesentlichen darin zu sehen, daß die Aufteilung eines Spanes in Faserlängs- und in Faserquerrichtung ermöglicht wird, wobei für den Abschälvorgang des Spanes ein normales gerades Streifenmesser ohne vorstehende Ritzernasen verwendet wird und die Größe und Art der herkömmlichen Ausnehmung innerhalb der Messerwelle für die Aufnahme von Messern, Messerhaltern und Fliehkeil unverändert bleibt. Weiterhin kann die Spanlänge in Faserquerrichtung leicht eingestellt werden.The advantages achieved by the invention are essentially to be seen in the fact that the splitting of a chip in the longitudinal and transverse directions of the fibers is made possible, a normal straight strip knife without protruding serrated noses being used for the peeling process of the chip and the size and type of the conventional recess within the knife shaft for the reception of knives, knife holders and centrifugal wedge remains unchanged. Furthermore, the chip length in the cross fiber direction can be easily adjusted.

Im folgenden wird die Erfindung anhand der Zeichnung näher erläutert, in der vorteilhafte Ausführungsbeispiele dargestellt sind. Es zeigen:

  • Figur 1 einen Querschnitt durch eine Ausnehmung innerhalb einer Messerwelle mit Messer, Messerhalter und Fliehkeil;
  • Figur 2 eine Draufsicht auf einen Abschnitt der Messerwelle gemäß Figur 1;
  • Figur 3 ein Rechteckprofil für einen Spantrenner gemäß dem Schnitt A-A in Figur 6;
  • Figur 4 ein Spitzprofil für einen Spantrenner gemäß Figur 6;
  • Figur 5 ein Rundprofil für einen Spantrenner gemäß Figur 6 und
  • Figur 6 einen Spantrenner mit zugehörigem Streifenmesser.
The invention is explained in more detail below with reference to the drawing, in which advantageous exemplary embodiments are shown. Show it:
  • 1 shows a cross section through a recess within a knife shaft with knife, knife holder and centrifugal wedge;
  • FIG. 2 shows a plan view of a section of the knife shaft according to FIG. 1;
  • Figure 3 shows a rectangular profile for a chip separator according to section AA in Figure 6;
  • FIG. 4 shows a pointed profile for a chip separator according to FIG. 6;
  • Figure 5 is a round profile for a chip breaker according to Figure 6 and
  • Figure 6 shows a chip separator with associated strip knife.

Innerhalb eines Messerhalters 2 werden Spantrenner 3 eingesetzt, die im Abstand der gewünschten Faserlänge der Späne aneinander zugeordnet sind. Dabei ist die Breite 9 der Spantrenner 3 abhängig von der Spandicke und der Holzart. Beide Parameter variieren jedoch miteinander, wobei die bevorzugte Breite des Spantrenners im Bereich von ca. 3 bis 6 mm liegt.Chip cutters 3 are used within a knife holder 2 and are assigned to one another at a distance of the desired fiber length of the chips. The width 9 of the chip separator 3 depends on the chip thickness and the type of wood. However, both parameters vary with one another, the preferred width of the chip separator being in the range from approximately 3 to 6 mm.

Die Lage des Spantrenners 3 zum Flugkreis der Messerschneide 4 ist definiert durch den Abstand13,üer sich aus der Spandicke zuzüglich des Verschleißanteils der Messerschneide 4 innerhalb einer Messerstandzeit ergibt. Um diesen Abstand steht vorteilhafterweise der Spantrenner 3 hinter der Messerschneide 4 zurück und liegt damit bündig am Messerwellenmantel 5 an. Der innerhalb einer Standzeit auftretende Verschleiß am Spantrenner beeinträchtigt die Funktion nicht, da auch noch eine ausreichende Funktionssicherheit besteht, wenn der Abstand zwischen Messerwellenmantel 5 und Spantrenner 3 wenigstens noch 3 mm beträgt.The position of the chip separator 3 in relation to the flight circle of the knife edge 4 is defined by the distance 13, which results from the chip thickness plus the wear portion of the knife edge 4 within a knife service life. The chip separator 3 advantageously stands behind this knife edge 4 by this distance and thus lies flush against the knife shaft jacket 5. The wear on the chip breaker that occurs within a service life does not impair the function, since there is also sufficient functional reliability if the distance between the knife shaft jacket 5 and the chip breaker 3 is at least 3 mm.

Die Funktionstüchtigkeit des Spantrenners ist solange gegeben, wie eine satte Anlage zwischen Spantrenner und Spanablaufseite des Messers 6 gegeben ist. Die trennende Funktion des Spantrenners 3 wird unterstützt durch Profile der dem Holz zugewandten Seite des Spantrenners 3, wie sie in den Figuren 3, 4 und 5. dargestellt sind. Wichtig für die Funktionstüchtigkeit der Spantrenner ist also Breite und satte Anlage an der Spanablaufseite des Messers. Mit dieser Anordnung ist es ohne weiteres möglich, den Span quer zur Faserrichtung zu trennen.The chip separator is functional as long as there is a full contact between the chip separator and the chip discharge side of the knife 6. The separating function of the chip separator 3 is supported by profiles on the side of the chip separator 3 facing the wood, as shown in FIGS. 3, 4 and 5. FIG. Width and full contact on the chip discharge side of the knife is important for the functionality of the chip separator. With this arrangement it is easily possible to separate the chip transversely to the fiber direction.

Um auch die Länge der Späne in senkrechter Lage zur Faser- richtung zu beeinflussen, wird die Größe des Winkels α zur Schneidkante des Messers , welcher ausschlaggebend für die Länge des Spanes senkrecht zur Faserrichtung ist,als Funktion des Schrägschnittwinkels β geeignet gewählt. Eine Trennung des Spanes in Faserquerrichtung wird dadurch ermöglicht, daß der Span unter dem gleichen Winkel zur Schneidkante des Messers austritt wie zuvor das Holz auf das Messer aufgetroffen ist. Dabei eilt die rechte Seite des Spanes um den Betrag der Ankathete zum Winkel ß der Schräglage des Messers gegenüber der linken Seite des Spanes vor. Mit zunehmender Spanlänge wird der Span innerhalb der Spantasche entlang des Spanweges 8 durch den Spantrenner 3 abgelenkt. Dabei tritt eine Verschiebekraft in Richtung des Pfeiles 7 auf, deren Gegenkraft durch die Festigkeit des Holzes bzw. der Bindung der Fasern untereinander gegeben ist.In order to influence the length of the chips in a position perpendicular to the fiber direction, the size of the angle α to the cutting edge of the knife, which is decisive for the length of the chip perpendicular to the fiber direction, is selected as a function of the bevel cutting angle β. A separation of the chip in the transverse direction of the fiber is made possible in that the chip exits at the same angle to the cutting edge of the knife as the wood has previously hit the knife. The right side of the chip leads the amount of the edge to the angle ß of the oblique position of the knife in relation to the left side of the chip. With increasing chip length, the chip is deflected within the chip pocket along the chip path 8 by the chip separator 3. A shifting force occurs in the direction of arrow 7, the counterforce of which is given by the strength of the wood or the binding of the fibers to one another.

Mit fortschreitender Spanlänge 11 wird die durch den Pfeil 7 dargestellte Verschiebekraft größer als die Bindung der Fasern des Spanes untereinander, so daß der Span in Faserrichtung aufreißt. Da durch die Lage des Spantrenners 3 die Verschiebekraft bzw. der Anstieg der Verschiebekraft im Zusammenhang mit der Spanlänge ansteigt, ist durch eine Veränderung des Winkels γ die Größe der Verschiebekraft bis auf Null reduzierbar. Das bedeutet aber, daß in dieser Stellung der Winkel, den der Spantrenner 3 zur Schneidkante 4 des Messers 6 einnimmt, gleich dem Austrittswinkel des Spanes in der Spantasche ist, so daß ein ungehinderter Abfluß des austretenden Spanes möglich ist. Die Folge dieser Anordnung ist ein Span, dessen Länge in Faserquerrichtung gleich der maximal möglichen Schnittlänge im zu zerspanenden Holz ist.As the chip length 11 progresses, the displacement force represented by the arrow 7 becomes greater than the binding of the fibers of the chip to one another, so that the chip breaks open in the direction of the fiber. Because of the position of the chip breaker 3, the displacement force or the increase in the displacement force increases in connection with the chip length, the magnitude of the displacement force can be reduced to zero by changing the angle γ. However, this means that in this position the angle which the chip separator 3 makes to the cutting edge 4 of the knife 6 is equal to the exit angle of the chip in the chip pocket, so that an unimpeded outflow of the emerging chip is possible. The result of this arrangement is a chip, the length of which in the transverse direction of the fiber is equal to the maximum possible cutting length in the wood to be cut.

Um andererseits Späne zu erhalten, deren Längen in Faser- ... querrichtung sehr kurz sind, muß ein Winkel γ gewählt wer- den, der kleiner als 90° ist. Die Größe dieses Winkels wird durch die minimale Spanlänge in Faserlängsrichtung 11 und der minimalen Abmessung der erforderlichen Spantasche, deren Breite in Laufrichtung des Spans mit 10 bezeichnet ist, zum störungsfreien Abfluß des geschnittenen Spans bestimmt. Besonders feine Späne werden erzielt, wenn der Winkel γ den Bereich von 30° nicht unterschreitet. Mit 13 in Figur 1 ist fernerhin die Spandicke plus dem zu erwartenden Verschleiß des Messers bezeichnet. Fernerhin ist in Figur 2 mit 12 der Pfeil bezeichnet, der die Laufrichtung der Messerwelle 1 angibt.On the other hand, in order to obtain chips whose lengths in the fiber ... transverse direction are very short, an angle γ must be selected which is less than 90 °. The size of this angle is determined by the minimum chip length in the fiber longitudinal direction 11 and the minimum dimension of the required chip pocket, the width of which is designated by 10 in the direction of travel of the chip, for the trouble-free drainage of the cut chip. Particularly fine chips are achieved if the angle γ does not fall below the range of 30 °. 13 in FIG. 1 also indicates the chip thickness plus the expected wear of the knife. Furthermore, the arrow in FIG. 2 denotes 12, which indicates the running direction of the knife shaft 1.

Aufgrund der Lage des Spantrenners 3 ergeben sich hinsichtlich des Verschleisses durch die Spantrennung in Faserquerrichtung neue Möglichkeiten. Da der Spantrenner nicht aus dem Flugkreis der Messer herausragt, können als Werkstoff Hartmetalle und Oxidkeramik verwendet werden. Der Spantrenner selbst kann im Messerhalter 2 lösbar oder unlösbar gehalten werden. Selbst eine Verstellung in Richtung der Messerschneide 4 um einen eventuellen Verschleiß an der dem Holz zugewandten Seite des Spantrenners auszugleichen, ist mit den herkömmlichen Mitteln möglich.Due to the position of the chip separator 3, there are new possibilities with regard to wear due to the chip separation in the transverse direction of the fibers. Since the chip breaker does not protrude from the knife circle, hard metals and oxide ceramics can be used. The chip breaker itself can be held in the knife holder 2 releasably or non-releasably. Even an adjustment in the direction of the knife edge 4 for possible wear on the Compensating the side of the chip breaker facing the wood is possible with the conventional means.

Der zum Messerhalter 2 mit Spantrenner 3 gehörende Fliehkeil weist Holzabstützungen auf, deren Größe und Lage sich nach der Größe und Lage des Spantrenners richten. Es ist aber auch durchaus möglich, auf einen Messerhalter ganz zu verzichten und die Spantrenner im Fliehkeil selbst anzuordnen.The centrifugal wedge belonging to the knife holder 2 with chip separator 3 has wooden supports, the size and position of which depend on the size and position of the chip separator. However, it is also entirely possible to dispense with a knife holder entirely and to arrange the chip separators in the centrifugal wedge itself.

Mit der Erfindung werden also besonders gute und gleich- ' mäßige Spandicken erzielt, da auf vorstehende Schneidelemente, die über den Flugkreis der Messer ragen, verzichtet wird und das Holz damit nicht unnötig in Bewegung versetzt wird. Selbst dünne Hölzer können mit hervorragender Spanqualität zerspant werden. Außerdem ist der Feingutanteil wegen der fehlenden Trennschnitte besonders gering; die Verwendung von Streifenmessern in einfachster Ausführung reduziert die Messerkosten pro Maschine. Als weiterer Vorteil sei genannt, daß beim Einbau der erfindungsgemäßen Teile in herkömmliche Messerwellen diese nicht geändert werden müssen.The invention thus achieves particularly good and uniform chip thicknesses, since protruding cutting elements which protrude beyond the flight circle of the knives are dispensed with and the wood is not unnecessarily set in motion. Even thin woods can be machined with excellent chip quality. In addition, the proportion of fines is particularly low due to the lack of separating cuts; the use of strip knives in the simplest version reduces the knife costs per machine. Another advantage is that when the parts according to the invention are installed in conventional knife shafts, they do not have to be changed.

Claims (5)

1. Verfahren zur Herstellung flächiger Holzspäne aus Rund-, Scheit- oder Industrierestholz unter Verwendung eines rotierenden mit Streifenmessern versehenen Schneidkörpers, dadurch gekennzeichnet , daß die Spantrennung quer zur Holzfaser mittels Spantrenner erfolgt, die unterhalb der Schneidkante des Streifenmessers angeordnet werden.1. A process for the production of flat wood chips from round, log or industrial waste wood using a rotating cutting body provided with strip knives, characterized in that the chip separation takes place transversely to the wood fiber by means of chip separators which are arranged below the cutting edge of the strip knife. 2. Verfahren zur Herstellung flächiger Holzspäne aus Rund-, Scheit-, oder Industrierestholz unter Verwendung eines_rotierenden mit Streifenmessern versehenen Schneidkörpers, dadurch gekennzeichnet , daß die Spantrennungs längs zur Holzfaser mittels Spantrenner erfolgt, die durch die Umlenkung des Spanes senkrecht zur Holzfaserlängsrichtung eine Trennung in Faserrichtung herbeiführen, wobei die Umlenkung an der Faserstirnfläche des Spanes erfolgt.2. Process for the production of flat wood chips from round, log, or industrial waste wood using a rotating body provided with strip knives, characterized in that the chip separation takes place lengthways to the wood fiber by means of chip separators which separate the fiber direction by deflecting the chip perpendicular to the longitudinal direction of the wood fiber bring about, the deflection taking place on the fiber end face of the chip. 3. Vorrichtung zur Herstellung flächiger Holzspäne aus Rund-, Scheit- oder Industrierestholz, mit einem rotierenden Schneidkörper, der mit Streifenmessern versehen ist, zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet , daß zur Spantrennung quer zur Holzfaser Spantrenner (3) unterhalb der Schneidkante (4 des Messers (6) an diesem anliegend angeordnet sind.3. Device for the production of flat wood shavings from round, log or industrial waste wood, with a rotating cutting body which is provided with strip knives, for carrying out the method according to claim 1, characterized in that for chip separation transverse to the wood fiber chip separator (3) below the Cutting edge (4 of the knife (6) are arranged adjacent to this. 4. Vorrichtung zur Herstellung flächiger Holzspäne aus Rund-, Scheit- und Industrierestholz, mit einem rotierenden Schneidkörper, der mit Streifenmessern versehen ist, zur Durchführung des Verfahrens nach Anspruch 2, dadurch gekennzeichnet , daß die Spantrenner (3) im spitzen oder stumpfen Winkel zur Schneidkante (4) der Messer (6) angeordnet sind.4. Device for the production of flat wood chips from round, log and industrial waste wood, with a rotating cutting body, which is provided with strip knives, for carrying out the method according to claim 2, characterized in that the chip separator (3) at an acute or obtuse angle to Cutting edge (4) of the knives (6) are arranged. 5. Vorrichtung nach Ansprüchen 3 oder 4, dadurch gekennzeichnet , daß die dem Holz zugewandte Fläche des Spantrenners (3) bündig abschließend mit dem Mantel des rotierenden Schneidkörpers angeordnet ist oder erhaben aus dem Mantel des rotierenden Schneidkörpers herausragt und unterhalb der Schneidkante (4) des Messers (6) liegt.5. Device according to claims 3 or 4, characterized in that the wood facing surface of the chip separator (3) is arranged flush with the jacket of the rotating cutter body or protrudes from the jacket of the rotating cutter body and below the cutting edge (4) of the Knife (6) lies.
EP80107400A 1980-11-26 1980-11-26 Process and device for producing flat shavings Withdrawn EP0052670A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP80107400A EP0052670A1 (en) 1980-11-26 1980-11-26 Process and device for producing flat shavings

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Application Number Priority Date Filing Date Title
EP80107400A EP0052670A1 (en) 1980-11-26 1980-11-26 Process and device for producing flat shavings

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EP0052670A1 true EP0052670A1 (en) 1982-06-02

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EP80107400A Withdrawn EP0052670A1 (en) 1980-11-26 1980-11-26 Process and device for producing flat shavings

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT514422A4 (en) * 2013-11-05 2015-01-15 Böhler Profil Gmbh Method for producing cutting blades

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2648231A1 (en) * 1972-03-24 1978-01-19 Ver Edelstahlwerke Ag Disposable blade assembly for wood shaving device
DE2721930B2 (en) * 1977-05-14 1980-07-10 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach Knife shaft for producing flat wood chips

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2648231A1 (en) * 1972-03-24 1978-01-19 Ver Edelstahlwerke Ag Disposable blade assembly for wood shaving device
DE2721930B2 (en) * 1977-05-14 1980-07-10 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach Knife shaft for producing flat wood chips

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT514422A4 (en) * 2013-11-05 2015-01-15 Böhler Profil Gmbh Method for producing cutting blades
AT514422B1 (en) * 2013-11-05 2015-01-15 Böhler Profil Gmbh Method for producing cutting blades
US10532486B2 (en) 2013-11-05 2020-01-14 Boehler Profil Gmbh Method for producing cutting blades

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