EP0807500A2 - Chipping machine for chips - Google Patents

Chipping machine for chips Download PDF

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Publication number
EP0807500A2
EP0807500A2 EP97104843A EP97104843A EP0807500A2 EP 0807500 A2 EP0807500 A2 EP 0807500A2 EP 97104843 A EP97104843 A EP 97104843A EP 97104843 A EP97104843 A EP 97104843A EP 0807500 A2 EP0807500 A2 EP 0807500A2
Authority
EP
European Patent Office
Prior art keywords
knife
clamping plate
clamping
ring
blade
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
EP97104843A
Other languages
German (de)
French (fr)
Other versions
EP0807500B1 (en
EP0807500A3 (en
Inventor
Robert Loth
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.)
B Maier Zerkleinerungstechnik GmbH
Original Assignee
B Maier Zerkleinerungstechnik GmbH
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 B Maier Zerkleinerungstechnik GmbH filed Critical B Maier Zerkleinerungstechnik GmbH
Publication of EP0807500A2 publication Critical patent/EP0807500A2/en
Publication of EP0807500A3 publication Critical patent/EP0807500A3/en
Application granted granted Critical
Publication of EP0807500B1 publication Critical patent/EP0807500B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005Tools therefor

Definitions

  • the invention relates to a chipper for wood chips.
  • chippers have become known in a variety of embodiments. For example, reference is made to DE-U-93 07 371.
  • Such chippers are supplied with wood chips of a certain size, with the aim of breaking down the wood chips into chips, which are mainly processed by the chipboard industry.
  • a chip extraction duct follows the gap in the radial direction. This channel is formed from the outer surface of the knife carrier of the one knife pack and from the outer surface of the clamping plate of the other knife pack.
  • the space is limited, on the one hand due to the diameter of the knife ring and on the other hand due to the fact that the individual knife pack - viewed in the circumferential direction - occupies a certain minimum space, due to the structurally required strength of the three components of the knife pack mentioned, namely of the carrier, the knife and the clamping plate.
  • the knife packs cannot be as close together as desired. This would mean a reduction in the size of the chip extraction channel.
  • the invention is based on the object of designing a chipper of the type mentioned in such a way that, for a given knife ring diameter, even more knife packs than previously can be accommodated on the knife ring.
  • the inventor has recognized that the clamping plate can be made much thinner than it has since, given the appropriate design - namely the arrangement of a rib.
  • the knife packs can thus be moved closer together, so that a larger number of knife packs can be accommodated on a knife ring of a given diameter, but at the same time the width of the chip extraction channel is retained.
  • the stiffening rib according to the invention extends above all to the radially inner end of the clamping plate. This is important so that the necessary clamping force is still transmitted from the clamping plate to the knife there, and so that there is no gaping between the radially inner clamping plate tip and the knife.
  • the rib can even extend in the radial direction beyond the radially inner main edge of the clamping plate.
  • the individual stiffening rib is suitably designed so that it affects the flow of chips as little as possible.
  • the edge of the rib which is flown against by the chips is expediently formed with sharp edges, so that current is divided.
  • This flowed edge can also be hardened or consist of a particularly hard, inserted part.
  • the clamping plate can not only be made thinner overall, but it can also taper particularly strongly in the direction of the cutting edge of the knife, so that the radially inner end of the clamping plate forms a very acute angle.
  • the knife packs according to FIGS. 1 to 4 each comprise a knife holder 1, a clamping plate 3 and a knife 2 clamped between them.
  • the decisive feature according to the invention is a stiffening rib 3.1, which is molded onto each cutter plate 3.
  • the stiffening rib 3.1 in the exemplary embodiment shown is advanced over the front edge 3.2 of the clamping plate 3, in the direction of the cutting edge 2.1 of the knife 2.
  • Figures 3 to 8 each have a guide body 4. This can be inserted into the knife package from the side. It has different cross sections, as can be seen from the figures. For example, it has a cross-shaped cross section in FIG. 3 and a T-shaped cross section in FIG. 4.

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

Abstract

The cutter comprises a rotor which has a ring of axially parallel vanes. Sets of blades are distributed around the periphery of a ring. Each set comprises a blade-holder (1) and a clamping plate (3) between which a blade (2) is clamped. The holder, blade and clamping plate are tightened by clamping screws. Each blade has elongated holes through which the clamping screws pass and which enables the blades to be radially adjusted for grinding. Each clamping plate has reinforcement ridges (3.1) at least on its part near the blade.

Description

Die Erfindung betrifft einen Zerspaner für Hackschnitzel. Derartige Zerspaner sind in einer Vielzahl von Ausführungsformen bekanntgeworden. Beispielsweise wird verwiesen auf DE-U-93 07 371. Solchen Zerspanern werden Hackschnitzel von einer bestimmten Größe zugeführt, mit dem Ziel, die Hackschnitzel in Späne zu zerlegen, die vor allem von der Spanplattenindustrie verarbeitet werden.The invention relates to a chipper for wood chips. Such chippers have become known in a variety of embodiments. For example, reference is made to DE-U-93 07 371. Such chippers are supplied with wood chips of a certain size, with the aim of breaking down the wood chips into chips, which are mainly processed by the chipboard industry.

Die allgemeinen Anforderungen an solche Zerspaner sind eine hohe Mengenleistung bei guter Spanqualität, ferner ein konstruktiver Aufbau, der eine kostengünstige Herstellung erlaubt.The general requirements for such chippers are a high volume output with good chip quality, as well as a structural design that allows cost-effective production.

Zwischen den einander benachbarten Messerpaketen des Messerringes befindet sich ein Spalt, der zwischen dem Messer des einen Messerpaketes und dem Träger des benachbarten Messerpaketes gebildet ist. Der Spalt verläuft parallel zur Schneide. Auf den Spalt folgt in radialer Richtung eine Späneabzugskanal. Dieser Kanal ist aus der Außenfläche des Messerträgers des einen Messerpaketes und aus der Außenfläche der Klemmplatte des anderen Messerpaketes gebildet.Between the knife packs of the knife ring which are adjacent to one another there is a gap which is formed between the knife of the one knife pack and the carrier of the adjacent knife pack. The gap runs parallel to the cutting edge. A chip extraction duct follows the gap in the radial direction. This channel is formed from the outer surface of the knife carrier of the one knife pack and from the outer surface of the clamping plate of the other knife pack.

In gewissen Fällen kann es vorteilhaft sein, eine möglichst große Anzahl von Messerpaketen auf dem Messerring unterzubringen. Der Raum ist jedoch begrenzt, und zwar zum einen aufgrund des Durchmessers des Messerringes und zum anderen infolge der Tatsache, daß das einzelne Messerpaket - in Umfangsrichtung gesehen - einen gewissen Mindestraum einnimmt, bedingt durch die konstruktiv erforderliche Stärke der genannten drei Komponenten des Messerpaketes, nämlich des Trägers, des Messers und der Klemmplatte. Außerdem können die Messerpakete nicht beliebig eng beieinander stehen. Dies würde eine Verringerung der Weite des Späneabzugskanals bedeuten.In certain cases it can be advantageous to accommodate the largest possible number of knife packs on the knife ring. However, the space is limited, on the one hand due to the diameter of the knife ring and on the other hand due to the fact that the individual knife pack - viewed in the circumferential direction - occupies a certain minimum space, due to the structurally required strength of the three components of the knife pack mentioned, namely of the carrier, the knife and the clamping plate. In addition, the knife packs cannot be as close together as desired. This would mean a reduction in the size of the chip extraction channel.

Letzteres wäre nicht akzeptabel, weil es zur Verstopfung dieses Kanales und damit zu einer Verringerung der Mengenleistung des Zerspaners kommen würde.The latter would not be acceptable because it would clog this channel and thus reduce the volume output of the chipper.

Der Erfindung liegt die Aufgabe zugrunde, einen Zerspaner der genannten Art derart zu gestalten, daß bei einem gegebenen Messerringdurchmesser noch mehr Messerpakete als bisher auf dem Messerring untergebracht werden können.The invention is based on the object of designing a chipper of the type mentioned in such a way that, for a given knife ring diameter, even more knife packs than previously can be accommodated on the knife ring.

Diese Aufgabe wird durch die Merkmale von Anspruch 1 gelöst.This object is solved by the features of claim 1.

Der Erfinder hat erkannt, daß die Klemmplatte bei entsprechender Gestaltung - nämlich der Anordnung einer Rippe - wesentlich dünner gemacht werden kann als seither. Man kann somit die Messerpakete näher aneinanderrücken, so daß sich eine größere Anzahl von Messerpaketen auf einem Messerring gegebenen Durchmessers unterbringen läßt, daß aber gleichzeitig die Weite des Späneabzugskanals erhalten bleibt. Die Versteifungsrippe gemäß der Erfindung erstreckt sich hierbei vor allem bis zum radial inneren Ende der Klemmplatte hin. Dies ist wichtig, damit auch dort noch die notwendige Klemmkraft von der Klemmplatte auf das Messer übertragen wird, und damit es somit nicht zu einem Klaffen zwischen der radial inneren Klemmplattenspitze und dem Messer kommt.The inventor has recognized that the clamping plate can be made much thinner than it has since, given the appropriate design - namely the arrangement of a rib. The knife packs can thus be moved closer together, so that a larger number of knife packs can be accommodated on a knife ring of a given diameter, but at the same time the width of the chip extraction channel is retained. The stiffening rib according to the invention extends above all to the radially inner end of the clamping plate. This is important so that the necessary clamping force is still transmitted from the clamping plate to the knife there, and so that there is no gaping between the radially inner clamping plate tip and the knife.

Die Rippe kann sich sogar in radialer Richtung über die radial innere Hauptkante der Klemmplatte hinaus erstrecken.The rib can even extend in the radial direction beyond the radially inner main edge of the clamping plate.

Besonders zweckmäßig ist es, die einzelnen Versteifungsrippen gerade dort anzuordnen, wo sich die Langlöcher zum Hindurchführen der Klemmschrauben befinden. Hat sich nämlich durch häufiges Nachschleifen das Maß des einzelnen Messers in radialer Richtung verringert, so daß sich die Schneide dem Langloch angenähert hat, so wird das betreffende Langloch durch die zugehörende Versteifungsrippe abgedeckt, falls diese entsprechend gestaltet ist.It is particularly expedient to arrange the individual stiffening ribs precisely where the elongated holes for the passage of the clamping screws are located. If the size of the individual knife in the radial direction has decreased due to frequent regrinding, so that the cutting edge has approached the elongated hole, the relevant one becomes Elongated hole covered by the associated stiffening rib, if this is designed accordingly.

Die einzelne Versteifungsrippe ist zweckmäßigerweise so ausgebildet, daß sie den Spänefluß so wenig wie möglich beeinträchtigt. So wird die von den Spänen angeströmte Kante der Rippe zweckmäßigerweise scharfkantig ausgebildet, so daß eine Stromteilung erfolgt. Diese angeströmte Kante kann auch gehärtet sein oder aus einem besonders harten, eingesetzten Teil bestehen.The individual stiffening rib is suitably designed so that it affects the flow of chips as little as possible. For example, the edge of the rib which is flown against by the chips is expediently formed with sharp edges, so that current is divided. This flowed edge can also be hardened or consist of a particularly hard, inserted part.

Durch die erfindungsgemäße Gestaltung kann die Klemmplatte nicht nur insgesamt dünner gemacht werden, sondern sie kann sich darüber hinaus in Richtung auf die Schneide des Messers besonders stark verjüngen, so daß das radial innere Ende der Klemmplatte einen sehr spitzen Winkel bildet.Due to the design according to the invention, the clamping plate can not only be made thinner overall, but it can also taper particularly strongly in the direction of the cutting edge of the knife, so that the radially inner end of the clamping plate forms a very acute angle.

Die Erfindung ist anhand der Zeichnung näher erläutert. Darin ist im einzelnen folgendes dargestellt:

Die Figuren 1 bis 4
zeigen Messerpakete unterschiedlicher Konfiguration.
Fig. 5
ist eine Schnittansicht durch den Gegenstand von Fig. 4, jedoch ohne Messerträger, und außerdem in Achsrichtung des Messers etwas versetzt.
Fig. 6
ist eine Draufsicht auf eine Klemmplatte mit darunter befindlichem Messer.
Fig. 7
ist ein Schnitt durch den Gegenstand von Fig. 6.
Fig. 8
ist eine Schnittansicht, ebenfalls durch eine Klemmplatte mit Messer.
Fig. 9
ist eine Draufsicht auf ein Messer.
The invention is explained in more detail with reference to the drawing. The following is shown in detail:
Figures 1 to 4
show knife packages of different configurations.
Fig. 5
is a sectional view through the object of Fig. 4, but without knife holder, and also slightly offset in the axial direction of the knife.
Fig. 6
is a top view of a clamping plate with a knife underneath.
Fig. 7
6 is a section through the subject of FIG. 6.
Fig. 8
is a sectional view, also through a clamping plate with a knife.
Fig. 9
is a top view of a knife.

Die Messerpakete gemäß der Figuren 1 bis 4 umfassen jeweils einen Messerträger 1, eine Klemmplatte 3 sowie ein zwischen diesen beiden eingespanntes Messer 2.The knife packs according to FIGS. 1 to 4 each comprise a knife holder 1, a clamping plate 3 and a knife 2 clamped between them.

Das entscheidende Merkmal gemäß der Erfindung ist eine Versteifungsrippe 3.1, die einer jeden Messerplatte 3 angeformt ist.The decisive feature according to the invention is a stiffening rib 3.1, which is molded onto each cutter plate 3.

Wie man besonders gut aus Fig. 6 erkennt, ist die Versteifungsrippe 3.1 bei dem dargestellten Ausführungsbeispiel über die Vorderkante 3.2 der Klemmplatte 3 vorgezogen, in Richtung auf die Schneide 2.1 des Messers 2 gesehen.As can be seen particularly well from FIG. 6, the stiffening rib 3.1 in the exemplary embodiment shown is advanced over the front edge 3.2 of the clamping plate 3, in the direction of the cutting edge 2.1 of the knife 2.

Die Figuren 3 bis 8 weisen jeweils einen Führungskörper 4 auf. Dieser ist von der Seite her in das Messerpaket einschiebbar. Er hat unterschiedliche Querschnitte, so wie aus den Figuren erkennbar. So hat er beispielsweise in Fig. 3 einen kreuzförmigen Querschnitt, und in Fig. 4 einen T-förmigen Querschnitt.Figures 3 to 8 each have a guide body 4. This can be inserted into the knife package from the side. It has different cross sections, as can be seen from the figures. For example, it has a cross-shaped cross section in FIG. 3 and a T-shaped cross section in FIG. 4.

Claims (4)

Zerspaner für Hackschnitzel 1.1 mit einem Rotor, der einen Kranz mit achsparallelen Flügeln aufweist; 1.2 mit einem Messerring, der eine Mehrzahl von über den Umfang verteilten Messerpaketen aufweist; 1.3 jedes Messerpaket umfaßt einen Messerträger, eine Klemmplatte sowie ein zwischen diesen beiden sandwichartig eingeklemmtes Messer; 1.4 Träger, Messer und Klemmplatte sind jeweils durch Klemmschrauben zusammengespannt; 1.5 jedes Messer weist Langlöcher auf, durch die die betreffende Klemmschraube hindurchgeführt ist, und die ein radiales Justieren des Messers entsprechend dessen Schneiden-Nachschliff ermöglichen; gekennzeichnet durch die folgenden Merkmale: 1.6 jede Klemmplatte weist wenigstens an ihrem der Messerschneide nahen Bereich Versteifungsrippen auf. Chipper for wood chips 1.1 with a rotor which has a ring with axially parallel blades; 1.2 with a knife ring which has a plurality of knife packets distributed over the circumference; 1.3 each knife package comprises a knife carrier, a clamping plate and a knife sandwiched between these two; 1.4 Carrier, knife and clamping plate are each clamped together by clamping screws; 1.5 each knife has elongated holes through which the clamping screw in question is passed and which allow the knife to be radially adjusted in accordance with its re-sharpening; characterized by the following features: 1.6 each clamping plate has stiffening ribs at least in its area near the knife edge. Zerspaner nach Anspruch 1, dadurch gekennzeichnet, daß die Versteifungsrippen - in Draufsicht gesehen - in Richtung auf die Messerschneide hin über die Kante der Klemmplatten vorspringen.Chipper according to claim 1, characterized in that the stiffening ribs - seen in plan view - project in the direction of the knife edge over the edge of the clamping plates. Zerspaner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Versteifungsrippen - in Draufsicht gesehen - zungenartig ausgebildet sind.Chipper according to claim 1 or 2, characterized in that the stiffening ribs - seen in plan view - are tongue-like. Zerspaner nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die einzelne Versteifungsrippe - in Draufsicht gesehen - über einem Langloch des Messers liegt.Chipper according to one of claims 1 to 3, characterized in that the individual stiffening rib - seen in plan view - lies over an elongated hole in the knife.
EP97104843A 1996-05-14 1997-03-21 Chipping machine for chips Expired - Lifetime EP0807500B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19619345A DE19619345A1 (en) 1996-05-14 1996-05-14 Chipper for wood chips
DE19619345 1996-05-14

Publications (3)

Publication Number Publication Date
EP0807500A2 true EP0807500A2 (en) 1997-11-19
EP0807500A3 EP0807500A3 (en) 1998-09-23
EP0807500B1 EP0807500B1 (en) 2000-07-19

Family

ID=7794240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104843A Expired - Lifetime EP0807500B1 (en) 1996-05-14 1997-03-21 Chipping machine for chips

Country Status (3)

Country Link
EP (1) EP0807500B1 (en)
AT (1) ATE194792T1 (en)
DE (1) DE19619345A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999059784A2 (en) * 1998-05-16 1999-11-25 B. Maier Zerkleinerungstechnik Gmbh Blade ring cutter
EP1050390A2 (en) * 1999-05-07 2000-11-08 Maier, B. Zerkleinerungstechnik GmbH Blade ring-type chip shredder for cutting coarse chips
EP1559522A1 (en) * 2004-01-30 2005-08-03 Pallmann Maschinenfabrik Gmbh + Co. Kg Chipper with a ring of knives
EP3292967A1 (en) * 2016-09-09 2018-03-14 Turner Development Limited Cutter and fly-wheel for wood chipping machines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI112185B (en) * 1999-05-28 2003-11-14 Andritz Patentverwaltung Device for reducing coarse fraction of wood chips
DE10160034B4 (en) * 2001-11-30 2004-02-26 Esterer Wd Gmbh & Co. Device and method for producing wood chips from wood

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746269A (en) * 1970-06-26 1973-07-17 G Maier Apparatus for cutting pre comminuted material into chips
US3904138A (en) * 1973-04-13 1975-09-09 Maier Kg Maschf B Holding device for knife sets in a shredding device
US4155384A (en) * 1946-03-29 1979-05-22 Aktiebolaget Iggesunds Bruk Disk type wood chipper
DE3600771A1 (en) * 1984-10-15 1987-07-16 Inter Wood Maschinen Cutter mounting for the cutter head of a wood-chipping machine
DE9307371U1 (en) * 1992-11-28 1994-01-13 B. Maier Zerkleinerungstechnik Gmbh, 33649 Bielefeld Chipper for wood chips
AU8184994A (en) * 1993-12-30 1995-07-06 Matthew D'ornan Keith Dean Blade structure for comminuting apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155384A (en) * 1946-03-29 1979-05-22 Aktiebolaget Iggesunds Bruk Disk type wood chipper
US3746269A (en) * 1970-06-26 1973-07-17 G Maier Apparatus for cutting pre comminuted material into chips
US3904138A (en) * 1973-04-13 1975-09-09 Maier Kg Maschf B Holding device for knife sets in a shredding device
DE3600771A1 (en) * 1984-10-15 1987-07-16 Inter Wood Maschinen Cutter mounting for the cutter head of a wood-chipping machine
DE9307371U1 (en) * 1992-11-28 1994-01-13 B. Maier Zerkleinerungstechnik Gmbh, 33649 Bielefeld Chipper for wood chips
AU8184994A (en) * 1993-12-30 1995-07-06 Matthew D'ornan Keith Dean Blade structure for comminuting apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999059784A2 (en) * 1998-05-16 1999-11-25 B. Maier Zerkleinerungstechnik Gmbh Blade ring cutter
WO1999059784A3 (en) * 1998-05-16 2000-04-06 Maier Zerkleinerungstech Gmbh Blade ring cutter
EP1050390A2 (en) * 1999-05-07 2000-11-08 Maier, B. Zerkleinerungstechnik GmbH Blade ring-type chip shredder for cutting coarse chips
EP1050390A3 (en) * 1999-05-07 2004-04-28 Maier, B. Zerkleinerungstechnik GmbH Blade ring-type chip shredder for cutting coarse chips
EP1559522A1 (en) * 2004-01-30 2005-08-03 Pallmann Maschinenfabrik Gmbh + Co. Kg Chipper with a ring of knives
DE102004004877A1 (en) * 2004-01-30 2005-08-18 Pallmann Maschinenfabrik Gmbh & Co Kg Crushing device with knife ring
EP3292967A1 (en) * 2016-09-09 2018-03-14 Turner Development Limited Cutter and fly-wheel for wood chipping machines

Also Published As

Publication number Publication date
ATE194792T1 (en) 2000-08-15
DE19619345A1 (en) 1997-11-20
EP0807500B1 (en) 2000-07-19
EP0807500A3 (en) 1998-09-23

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