EP0958900B1 - A knife for cutting machines - Google Patents

A knife for cutting machines Download PDF

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Publication number
EP0958900B1
EP0958900B1 EP99201562A EP99201562A EP0958900B1 EP 0958900 B1 EP0958900 B1 EP 0958900B1 EP 99201562 A EP99201562 A EP 99201562A EP 99201562 A EP99201562 A EP 99201562A EP 0958900 B1 EP0958900 B1 EP 0958900B1
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EP
European Patent Office
Prior art keywords
knife
cutting
machine
basic body
wedge
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Expired - Lifetime
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EP99201562A
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German (de)
French (fr)
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EP0958900A2 (en
EP0958900A3 (en
Inventor
Martin Dipl.-Ing. Mehl
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Plansee Tizit AG
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Plansee Tizit AG
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Priority to AT99201562T priority Critical patent/ATE244623T1/en
Publication of EP0958900A2 publication Critical patent/EP0958900A2/en
Publication of EP0958900A3 publication Critical patent/EP0958900A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member

Definitions

  • the invention relates to machine knives for cutting sheet-shaped Material, in particular paper, consisting of a knife body and an associated with this cutting part of wear-resistant material.
  • Machine knife for cutting sheet material such as paper, Veneer, plastic films and the like can be considered as the most diverse Types of knives, such as plan cutting knives, trimming knives, punching knife in often be designed very large sizes. So are especially at Cutting blades for cutting paper knife lengths of 2 m and about it in use.
  • the cutting part and the blade body are preferable firmly connected by brazing.
  • the problem with this is that Carbide and steel have a very different thermal Have expansion coefficients.
  • it comes on the one hand during heating Soldering temperature to distortion problems in one direction already at Soldering process requires a difficult alignment of the parts to be soldered.
  • At the Cooling after soldering is often a delay in the opposite direction, so that the blades are still mechanically aligned Need to become.
  • This alignment process is complicated and can often Cracks and breakouts in the cutting part lead so that the machine knife as a whole committee is. Due to the high price for the cutting part made of carbide and the considerable manufacturing effort is already there a committee of individual machine knives to a considerable increase in price the production.
  • the cutting part of wear-resistant material is designed so that it can be reground about 40 times after a dulling of the cutting edge. Then the cutting knife is finally used up.
  • the machine knives must be removed from the machine, packaged and transported to the grinding services, which is associated with high costs. In particular, the removal and installation of the blades in the machine is associated with machine downtime up to 1 hour and more, resulting in a high production loss.
  • DE-OS 44 16 230 describes, for example, a punching blade for cutting sheet material in which the wedge-shaped blade made of tungsten carbide frontally over individual pin-shaped connecting elements, which are expandable, for example, via a Sp Dahldom, interchangeable with the blade body is connected.
  • the disadvantage here is that the recesses for the peg-shaped connecting elements in the cutting part made of hard metal are difficult to incorporate and that is significantly weakened compared to steel significantly brittle cutting part sensitive. Moreover, a replacement of the cutting part is relatively cumbersome and time consuming.
  • DE-PS 41 10 039 describes a plan cutting blade in which the blade body has a recess for receiving a double-sided usable cutting blade, which is connected to the tool body by screws.
  • the receptacle is designed so that the cutting edge of the cutting blade, which is not located in the cutting insert is protected.
  • a disadvantage of this type of cutting knife turn is the cumbersome attachment of the cutting blade on the blade body and that the recording in the blade body is difficult to produce due to the wedge shape of the blade and is highly prone to deformation due to the mechanical stress during cutting.
  • Object of the present invention is therefore a machine blade to which avoids the problems described above.
  • this is achieved in that the cutting part on a Adapter part is attached, which frontally via continuous, self-locking fitting releasably attached to the blade body and can be locked with this over additional devices.
  • the cutting part can be made substantially smaller than in previously known embodiments.
  • the cutting part can be connected to the adapter part by a variety of connection options such as soldering, gluing, forming rolls or screws.
  • the connection with the adapter part by soldering and subsequent alignment is much easier and less problematic. Since the cutting part is no longer reground at all or at least substantially less often, an adhesive bond which satisfies all practical requirements can also be achieved between the cutting part and the adapter part.
  • the mating elements are designed as a wedge-shaped spring on the adapter part and a correspondingly adapted wedge-shaped groove on the blade body is particularly advantageous.
  • the adapter part of this is automatically held on the machine body and clamped by the additional locking device precisely fit positive locking and secured.
  • this wedge angle have proven in a range between 4 ° and 8 ° for tongue and groove.
  • Adpater presses have a or several perpendicular to the front side of the adapter part extending bolt with Circumferential circular recesses in the axial direction, which in engage corresponding holes in the blade body as well as in Tool body rotatable eccentric, which in the circular Recesses of the bolts intervene, proven.
  • the invention achieves a modular construction of the cutting blade with a flexible adaptation possibility to the respective requirements.
  • By simply grinding the knife body it is possible to tailor an adaptation of knife bodies of different thickness to an adapter part of a single type, which then varies only in the required lengths, whereby the bearing holder of the adapter parts is substantially simplified.
  • Knife body -1- and adapter part -3- are made of steel.
  • Knife body -1- and adapter part -3- are made of steel.
  • a recess is incorporated, in which a thin strip-shaped cutting part -2- is soldered hard metal.
  • the adapter part -3- has a continuous wedge-shaped spring -4- with a wedge angle of 5 °.
  • the blade body -1- has on one longitudinal side a correspondingly shaped wedge-shaped groove -5- for receiving the spring -4-.
  • the adapter part -3- has a plurality of perpendicular to the spring -4- extending bolts - 6- with circumferentially circular recesses -8- in the axial direction, the in corresponding holes -9- of the blade body -1- engage. over in the tool body -1- inserted rotatable eccentric -7-, in the circular recesses -8- the bolt -6- intervene, will be the final non-positive, secure connection of the adapter part -3- with the Tool body -1 reached.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Details Of Cutting Devices (AREA)
  • Knives (AREA)
  • Nonmetal Cutting Devices (AREA)

Description

Die Erfindung betrifft Maschinenmesser zum Schneiden von blattförmigem Material insbesondere Papier, bestehend aus einem Messergrundkörper und einem mit diesem verbundenen Schneidenteil aus verschleißfestem Material.The invention relates to machine knives for cutting sheet-shaped Material, in particular paper, consisting of a knife body and an associated with this cutting part of wear-resistant material.

Maschinenmesser zum Schneiden von blattförmigem Material wie Papier, Furnier, Kunststofffolien und dergleichen können als unterschiedlichste Messerarten, wie Planschneidmesser, Dreischneidmesser, Stanzmesser in oft sehr großen Baugrößen ausgeführt sein. So sind insbesondere bei Plansschneidmessern zum Schneiden von Papier Messerlängen von 2 m und darüber in Verwendung.Machine knife for cutting sheet material such as paper, Veneer, plastic films and the like can be considered as the most diverse Types of knives, such as plan cutting knives, trimming knives, punching knife in often be designed very large sizes. So are especially at Cutting blades for cutting paper knife lengths of 2 m and about it in use.

Um die Herstellungskosten derartiger Messer in Grenzen zu halten, ist es bekannt, lediglich den zum Schneiden verwendeten Schneidenteil aus hochwertigem, verschleißfestem Material wie beispielsweise Hartmetall zu fertigen und den restlichen, nicht auf Verschleiß beanspruchten Messergrundkörper aus einem kostengünstigeren Werkstoff wie Stahl zu fertigen.In order to limit the manufacturing costs of such knives, it is known, only the cutting part used for cutting high-quality, wear-resistant material such as carbide too finished and the rest, not stressed on wear Knife body made of a less expensive material such as steel too finished.

In den meisten Fällen sind Schneidenteil und Messergrundkörper vorzugsweise durch Hartlöten fix miteinander verbunden. Problematisch dabei ist, daß Hartmetall und Stahl einen stark unterschiedlichen thermischen Ausdehnungskoeffizienten aufweisen. Insbesondere bei langen Maschinenmessern kommt es dadurch einerseits beim Erwärmen auf Löttemperatur zu Verzugsproblemen in eine Richtung die schon beim Lötprozeß ein schwieriges Ausrichten der zu verlötenden Teile erfordert. Beim Abkühlen nach dem Verlöten kommt es vielfach zu einem Verzug in die entgegengesetzte Richtung, so daß die Messer noch mechanisch ausgerichtet werden müssen. Dieser Ausrichtvorgang ist aufwendig und kann vielfach zu Rissen und Ausbrüchen im Schneidenteil führen, so daß das Maschinenmesser als Ganzes Ausschuß ist. Aufgrund des hohen Preises für den Schneidenteil aus Hartmetall und des erheblichen Fertigungsaufwandes kommt es bereits bei einem Ausschuß einzelner Maschinenmesser zu einer erheblichen Verteuerung der Produktion. In most cases, the cutting part and the blade body are preferable firmly connected by brazing. The problem with this is that Carbide and steel have a very different thermal Have expansion coefficients. Especially with long Machine knives, it comes on the one hand during heating Soldering temperature to distortion problems in one direction already at Soldering process requires a difficult alignment of the parts to be soldered. At the Cooling after soldering is often a delay in the opposite direction, so that the blades are still mechanically aligned Need to become. This alignment process is complicated and can often Cracks and breakouts in the cutting part lead so that the machine knife as a whole committee is. Due to the high price for the cutting part made of carbide and the considerable manufacturing effort is already there a committee of individual machine knives to a considerable increase in price the production.

Bei derartigen einstückigen Verbundschneidmessern ist der Schneidenteil aus verschleißfestem Material so ausgelegt, daß er nach einem Stumpfwerden der Schneide etwa 40 x nachgeschliffen werden kann. Dann ist das Schneidmesser endgültig verbraucht. Zum Schleifen müssen die Maschinenmesser aus der Maschine ausgebaut, verpackt und zu den Schleifdiensten transportiert werden, was mit hohen Kosten verbunden ist.
Insbesondere der Aus- und Einbau der Messer in die Maschine ist mit Maschinenausfallzeiten bis zu 1 Stunde und mehr verbunden, wodurch sich ein hoher Produktionsausfall ergibt.In such one-piece composite cutting knives, the cutting part of wear-resistant material is designed so that it can be reground about 40 times after a dulling of the cutting edge. Then the cutting knife is finally used up. For grinding, the machine knives must be removed from the machine, packaged and transported to the grinding services, which is associated with high costs.
In particular, the removal and installation of the blades in the machine is associated with machine downtime up to 1 hour and more, resulting in a high production loss.

Um die Probleme beim Hartlöten der Verbundmesser zu beseitigen, hat man auch versucht den Schneidenteil durch Kleben mit dem Messergrundkörper zu verbinden. Insbesondere aufgrund der wiederholten hohen Temperaturbelastung der Klebestelle beim Nachschleifen der Messer und der gleichzeitigen Verkleinerung der Klebefläche wird die Klebeverbindung laufend geschwächt, weshalb sich derartige Verbundmesser nicht zuletzt aus Sichterheitsgründen bis jetzt nicht in der Praxis durchgesetzt haben. Derartige Maschinenmesser sind beispielsweise in der DE-OS 31 00 673 beschrieben.To eliminate the problems of brazing the compound knife, you have also tries the cutting part by gluing with the blade body too connect. Especially because of the repeated high Temperature load of the splice during regrinding of the knives and the Simultaneous reduction of the adhesive surface, the adhesive bond is running weakened, which is why such composite knife last but not least For reasons of clarity have not prevailed in practice. Such machine knives are, for example, in DE-OS 31 00 673 described.

Um die mit der Herstellung einstückiger Verbundmesser verbundenen Probleme zu beseitigen hat es nicht an Vorschlägen gefehlt, den Schneidenteil aus Hartmetall mechanisch, auswechselbar mit dem Messergrundkörper zu verbinden.To those associated with the production of one-piece composite knife To eliminate problems there was no lack of suggestions, the cutting edge made of tungsten carbide mechanically, interchangeable with the blade body too connect.

Die DE-OS 44 16 230 beschreibt beispielsweise ein Stanzmesser zum Schneiden von blattförmigem Material bei dem der keilförmige Schneidenteil aus Hartmetall stirnseitig über einzelne zapfenförmige Verbindungselemente, die beispielsweise über einen Spreizdom aufweitbar sind, auswechselbar mit dem Messergrundkörper verbunden ist.
Nachteilig dabei ist, daß die Ausnehmungen für die zapfenförmigen Verbindungselemente in den Schneidenteil aus Hartmetall nur schwer einzuarbeiten sind und der im Vergleich zu Stahl deutlich sprödere Schneidenteil empflindlich geschwächt wird. Darüberhinaus ist ein Auswechseln des Schneidenteiles verhältnismäßig umständlich und zeitaufwendig.DE-OS 44 16 230 describes, for example, a punching blade for cutting sheet material in which the wedge-shaped blade made of tungsten carbide frontally over individual pin-shaped connecting elements, which are expandable, for example, via a Spreizdom, interchangeable with the blade body is connected.
The disadvantage here is that the recesses for the peg-shaped connecting elements in the cutting part made of hard metal are difficult to incorporate and that is significantly weakened compared to steel significantly brittle cutting part sensitive. Moreover, a replacement of the cutting part is relatively cumbersome and time consuming.

Die DE-PS 41 10 039 beschreibt ein Planschneidmesser bei dem der Messergrundkörper eine Ausnehmung zur Aufnahme einer doppelseitig verwendbaren Schneidklinge aufweist, welche mit dem Werkzeuggrundkörper durch Schrauben verbunden ist. Die Aufnahme ist dabei so ausgestaltet, daß die Schneidkante der Schneidklinge, welche sich nicht im Schneideinsatz befindet, geschützt ist.
Nachteilig bei dieser Art von Schneidmesser ist wiederum die umständliche Befestigung der Schneidklinge am Messergrundkörper und daß die Aufnahme im Messergrundkörper bedingt durch die Keilform der Schneide nur schwer herstellbar ist und aufgrund der mechanischen Beanspruchung beim Schneiden stark verformungsgefährdet ist.DE-PS 41 10 039 describes a plan cutting blade in which the blade body has a recess for receiving a double-sided usable cutting blade, which is connected to the tool body by screws. The receptacle is designed so that the cutting edge of the cutting blade, which is not located in the cutting insert is protected.
A disadvantage of this type of cutting knife turn is the cumbersome attachment of the cutting blade on the blade body and that the recording in the blade body is difficult to produce due to the wedge shape of the blade and is highly prone to deformation due to the mechanical stress during cutting.

Aufgabe der vorliegenden Erfindung ist es daher ein Maschinenmesser zu schaffen, das die vorstehend beschriebenen Probleme vermeidet.Object of the present invention is therefore a machine blade to which avoids the problems described above.

Erfindungsgemäß wird dies dadurch erreicht, daß der Schneidenteil auf einem Adapterteil befestigt ist, welcher stirnseitig über durchgehende, selbstklemmende Paßelemente lösbar am Messergrundkörper befestigbar und mit diesem über Zusatzeinrichtungen arretierbar ist.According to the invention this is achieved in that the cutting part on a Adapter part is attached, which frontally via continuous, self-locking fitting releasably attached to the blade body and can be locked with this over additional devices.

Dadurch, daß der Schneidenteil auf einem Adapterteil befestigt ist, kann der Schneidenteil wesentlich kleiner als bei bisher bekannten Ausführungen ausgeführt werden. Bei einem Verschleiß des Schneidenteiles wird nicht mehr das gesamte Maschinenmesser und auch in der Regel nicht der Schneidenteil alleine, sondern der Schneidenteil einschließlich dem Adapterteil ausgewechselt. Dies erfolgt schnell und einfach, ohne daß der Messergrundkörper aus der Maschine ausgebaut werden muß.
Der Schneidenteil kann mit dem Adapterteil durch die unterschiedlichsten Verbindungsmöglichkeiten wie Löten, Kleben, Formwalzen oder Schrauben verbunden sein. Characterized in that the cutting part is mounted on an adapter part, the cutting part can be made substantially smaller than in previously known embodiments. In case of wear of the cutting part is no longer the entire machine knife and usually not the cutting part alone, but the cutting part including the adapter part replaced. This is done quickly and easily, without the blade body must be removed from the machine.
The cutting part can be connected to the adapter part by a variety of connection options such as soldering, gluing, forming rolls or screws.

Dadurch, daß der Schneidenteil gegenüber bekannten Ausführungen wesentlich kleiner ausgeführt ist, ist die Verbindung mit dem Adapterteil durch Verlöten und anschließendes Ausrichten wesentlich einfacher und unproblematischer.
Da der Schneidenteil überhaupt nicht mehr oder zumindest wesentlich weniger oft nachgeschliffen wird, kann auch eine Klebeverbindung, die allen praktischen Anforderngen genügt, zwischen Schneidenteil und Adapterteil erreicht werden.Characterized in that the cutting part is made much smaller compared to known designs, the connection with the adapter part by soldering and subsequent alignment is much easier and less problematic.
Since the cutting part is no longer reground at all or at least substantially less often, an adhesive bond which satisfies all practical requirements can also be achieved between the cutting part and the adapter part.

Durch die stirnseitigen durchgehenden, selbstklemmenden Paßelemte wird eine einfache Befestigung des Adapterteiles am Messergrundkörper und eine genügend genaue Ausrichtung über die vollständige Messerlänge erreicht.By the front-side continuous, self-locking Paßelemte is a simple attachment of the adapter part on the blade body and a achieved sufficiently accurate alignment over the entire knife length.

Besonders vorteilhaft ist es, wenn die Paßelemente als keilförmige Feder am Adapterteil und eine entsprechend angepaßte, keilförmige Nut am Messergrundkörper ausgeführt sind.
Durch einfaches Aufschieben des Adapterteiles wird dieser am Maschinengrundkörper automatisch gehalten und durch die zusätzliche Arretiereinrichtung paßgenau formschlüssig verspannt und gesichert.
Insbesondere haben sich dabei Keilwinkel in einem Bereich zwischen 4° und 8° für Nut und Feder bewährt.It when the mating elements are designed as a wedge-shaped spring on the adapter part and a correspondingly adapted wedge-shaped groove on the blade body is particularly advantageous.
By simply pushing on the adapter part of this is automatically held on the machine body and clamped by the additional locking device precisely fit positive locking and secured.
In particular, this wedge angle have proven in a range between 4 ° and 8 ° for tongue and groove.

Als Zusatzeinrichtungen zum Arretieren des Adpaterteiles haben sich ein oder mehrere senkrecht zur Stirnseite des Adapterteiles verlaufende Bolzen mit umfangsseitig kreisförmigen Ausnehmungen in Axialrichtung, welche in entsprechende Bohrungen des Messergrundkörpers eingreifen sowie im Werkzeuggrundkörper verdrehbare Exzenter, welche in die kreisförmigen Ausnehmungen der Bolzen eingreifen, bewährt.As an accessory for locking the Adpaterteiles have a or several perpendicular to the front side of the adapter part extending bolt with Circumferential circular recesses in the axial direction, which in engage corresponding holes in the blade body as well as in Tool body rotatable eccentric, which in the circular Recesses of the bolts intervene, proven.

Durch die Exzenter, die im Werkzeuggrundkörper eingearbeitet sind, wird eine einfache sichere kraftschlüssige und dennoch schnell lösbare Verbindung des Adapterteiles mit dem Messergrundkörper ohne verlierbare, lose Zusatzelemente erreicht. Due to the eccentric, which are incorporated in the tool body is a simple, secure non-positive and yet quickly detachable connection of the Adapter part with the blade body without losable, loose Additional elements achieved.

Durch die Erfindung wird ein modularer Aufbau der Schneidmesser mit einer flexiblen Anpassungsmöglichkeit an die jeweiligen Anforderungen erreicht. So ist insbesondere eine Bestückung der Messergrundkörper mit Schneidteilen unterschiedlicher Werkstoffqualitäten wie Hartmetall, Stahl oder Keramik aber auch mit unterschiedlichen Längen des Schneidenteiles möglich.
Durch einfaches Anschleifen der Messergrundkörper ist es möglich, eine Anpassung von Messergrundkörpern unterschiedlicher Dicke auf einen Adapterteil einer einzigen Bauart abzustimmen, der dann nur mehr in den erforderlichen Längen variiert, wodurch die Lagerhalterung der Adapterteile wesentlich vereinfacht wird.The invention achieves a modular construction of the cutting blade with a flexible adaptation possibility to the respective requirements. In particular, it is possible to assemble the knife body with cutting parts of different material qualities, such as hard metal, steel or ceramic, but also with different lengths of the cutting part.
By simply grinding the knife body, it is possible to tailor an adaptation of knife bodies of different thickness to an adapter part of a single type, which then varies only in the required lengths, whereby the bearing holder of the adapter parts is substantially simplified.

Im folgenden wird die Erfindung an Hand einer Zeichnung näher erläutert Es zeigt:

  • Figur 1 ein erfindungsgemäßes Maschinenmesser in perspektivischer Ansicht
    • In the following the invention with reference to a drawing is explained in more detail It shows:
  • 1 shows a machine knife according to the invention in a perspective view

    • In Figur 1 ist ein Teilstück eines erfindungsgemäßen Planschneidmessers zum Schneiden von Papier, bestehend aus einem Messergrundkörper -1- und einem auswechselbaren Adapterteil -3- in getrenntem Zustand dargestellt. Messergrundkörper -1- und Adapterteil -3- sind aus Stahl gefertigt. In den keilförmig auslaufenden Schneidenbereich des Adapterteiles -3- ist eine Ausnehmung eingearbeitet, in welche ein dünner streifenförmiger Schneidenteil -2- aus Hartmetall eingelötet ist.
    An der dem Schneidenbereich gegenüberliegenden Längsseite weist der Adapterteil -3- eine durchgehende keilförmige Feder -4- mit einem Keilwinkel von 5° auf. Der Messergrundkörper -1- weist an einer Längsseite eine entsprechend ausgeformte keilförmige Nut -5- zur Aufnahme der Feder -4- auf. Auf diese Weise wird allein durch kräftiges Aufschieben des Adapters auf den Messergrundkörper auch in aufgestelltem Zustand des Maschinenmessers selbst bei großen und schweren Maschinenmessern eine vorläufige selbsthaltende Verbindung erreicht Damit wird eine einfache Auswechselbarkeit des Adapters ermöglicht.     1 shows a portion of a plan cutting blade according to the invention for cutting paper, consisting of a blade base -1- and a replaceable adapter part -3- shown in a separate state. Knife body -1- and adapter part -3- are made of steel. In the wedge-shaped expiring cutting area of the adapter part -3- a recess is incorporated, in which a thin strip-shaped cutting part -2- is soldered hard metal.
    At the longitudinal side opposite the cutting area, the adapter part -3- has a continuous wedge-shaped spring -4- with a wedge angle of 5 °. The blade body -1- has on one longitudinal side a correspondingly shaped wedge-shaped groove -5- for receiving the spring -4-. In this way, even by strong pushing the adapter on the blade body even in the erected state of the machine knife even with large and heavy machine blades a provisional latching connection is achieved Thus, a simple interchangeability of the adapter allows.

    Der Adapterteil -3- weist mehrere senkrecht zur Feder -4- verlaufende Bolzen - 6- mit umfangsseitig kreisförmigen Ausnehmungen -8- in Axialrichtung auf, die in entsprechende Bohrungen -9- des Messergrundkörpers -1- eingreifen. Über im Werkzeuggrundkörper -1- eingesetzte verdrehbare Excenter -7-, die in die kreisförmigen Ausnehmungen -8- der Bolzen -6- eingreifen, wird die endgültige kraftschlüssige, sichere Verbindung des Adapterteiles -3- mit dem Werkzeuggrundkörper-1- erreicht.The adapter part -3- has a plurality of perpendicular to the spring -4- extending bolts - 6- with circumferentially circular recesses -8- in the axial direction, the in corresponding holes -9- of the blade body -1- engage. over in the tool body -1- inserted rotatable eccentric -7-, in the circular recesses -8- the bolt -6- intervene, will be the final non-positive, secure connection of the adapter part -3- with the Tool body -1 reached.

    Claims (4)

    1. Machine knife for cutting sheet-like material, in particular paper, comprising a knife basic body (1) and a knife-edge part (2) made of wear-resistant material connected to the latter,
      characterized in that the knife-edge part (2) is fastened on an adapter part (3), which is fastenable at one end by continuous, self-clamping fitting elements (4, 5) releasably to the knife basic body (1) and lockable with the latter by means of additional devices (6, 7).
    2. Machine knife according to claim 1, characterized in that the fitting elements (4, 5) are a wedge-shaped tongue (4) on the adapter part (3) and a correspondingly adapted wedge-shaped groove (5) in the knife basic body (1).
    3. Machine knife according to claim 2, characterized in that the wedge angles of tongue (4) and groove (5) lie in a range of between 4° and 8°.
    4. Machine knife according to one of claims 1 to 3,
      characterized in that the additional devices (6, 7) take the form of one or more bolts (6) extending at right angles to the end of the adapter part (3) and having in the periphery circular recesses (8) in axial direction, which engage into corresponding bores (9) in the knife basic body (1), as well as eccentrics (7), which are rotatably fixed in the tool basic body (1) and engage into the circular recesses (8) of the bolts (6).
    EP99201562A 1998-05-22 1999-05-19 A knife for cutting machines Expired - Lifetime EP0958900B1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    AT99201562T ATE244623T1 (en) 1998-05-22 1999-05-19 MACHINE KNIFE

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    AT33698U 1998-05-22
    AT0033698U AT2658U1 (en) 1998-05-22 1998-05-22 MACHINE KNIFE

    Publications (3)

    Publication Number Publication Date
    EP0958900A2 EP0958900A2 (en) 1999-11-24
    EP0958900A3 EP0958900A3 (en) 2002-07-17
    EP0958900B1 true EP0958900B1 (en) 2003-07-09

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99201562A Expired - Lifetime EP0958900B1 (en) 1998-05-22 1999-05-19 A knife for cutting machines

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    EP (1) EP0958900B1 (en)
    AT (2) AT2658U1 (en)
    DE (1) DE59906233D1 (en)
    ES (1) ES2200461T3 (en)

    Families Citing this family (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DK1124670T3 (en) * 1999-08-30 2004-04-05 Joachim Kozlowski Machine knife for pruning books and similar items
    CN102233592A (en) * 2010-04-26 2011-11-09 鸿富锦精密工业（深圳）有限公司 Cutter and shearing machine with same
    CN104097230A (en) * 2014-06-30 2014-10-15 张家港市华阳针纺织品有限公司 Blade of sealing cutting machine
    AT518842B1 (en) * 2016-07-12 2021-01-15 Boehlerit Gmbh & Co Kg Cutting knife
    DE102017223181A1 (en) * 2017-12-19 2019-06-19 BSH Hausgeräte GmbH Blade for an ultrasonic tool and ultrasonic tool with blade
    EP3737541A4 (en) 2018-01-14 2021-09-15 Craftstech, Inc. Modular cutter blade assembly and machines containing the same

    Family Cites Families (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CH320348A (en) * 1954-11-10 1957-03-31 Gerstner Fritz Knife holder with knife for paper cutting machines
    DE9309116U1 (en) * 1993-06-18 1993-08-12 Eugen Drohmann GmbH Stanzmesser und Werkzeugfabrik, 73547 Lorch Punching knife

    Also Published As

    Publication number Publication date
    ES2200461T3 (en) 2004-03-01
    EP0958900A2 (en) 1999-11-24
    EP0958900A3 (en) 2002-07-17
    DE59906233D1 (en) 2003-08-14
    ATE244623T1 (en) 2003-07-15
    AT2658U1 (en) 1999-02-25

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