EP0523435B1 - Transverse cutter device in folders for web-feb rotary presses - Google Patents

Transverse cutter device in folders for web-feb rotary presses Download PDF

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Publication number
EP0523435B1
EP0523435B1 EP19920110936 EP92110936A EP0523435B1 EP 0523435 B1 EP0523435 B1 EP 0523435B1 EP 19920110936 EP19920110936 EP 19920110936 EP 92110936 A EP92110936 A EP 92110936A EP 0523435 B1 EP0523435 B1 EP 0523435B1
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EP
European Patent Office
Prior art keywords
grooved
cutting device
transverse cutting
spring part
pressure spring
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.)
Expired - Lifetime
Application number
EP19920110936
Other languages
German (de)
French (fr)
Other versions
EP0523435A1 (en
Inventor
Horst Bernhard Michalik
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert AG
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 DE19924220480 external-priority patent/DE4220480A1/en
Application filed by Koenig and Bauer Albert AG filed Critical Koenig and Bauer Albert AG
Publication of EP0523435A1 publication Critical patent/EP0523435A1/en
Application granted granted Critical
Publication of EP0523435B1 publication Critical patent/EP0523435B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B26D7/20—Cutting beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B41F13/56—Folding or cutting
    • B41F13/60—Folding or cutting crosswise
    • 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
    • B26D7/20—Cutting beds
    • B26D2007/202—Rollers or cylinders being pivoted during operation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y10T83/4838—With anvil backup
    • Y10T83/4841—With resilient anvil surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y10T83/4844—Resiliently urged cutter or anvil member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9309—Anvil
    • Y10T83/9312—Rotatable type

Definitions

  • the invention relates to a cross cutting device according to the preamble of patent claim 1.
  • the generic US-E-17 892 shows a cross cutting device on folding units for rotary printing presses.
  • a cutting cylinder with a rigid cutting knife is provided.
  • a working cylinder which interacts with the cutting cylinder has a groove strip as an abutment for separating material to be cut.
  • the groove strip consists of a one-piece groove part and a compression spring part. Seen in the working direction of rotation of the working cylinder, the groove part and then the compression spring part are arranged next to one another on its circumference.
  • the compression spring part consists of a compression spring loaded rail.
  • a device for cutting and transferring multilayer products that come from a rotary printing press which has a cutting cylinder and a useful cylinder.
  • the invention has for its object to provide a cross cutting device on folding units for web-fed rotary printing presses using a cutting cylinder and a working cylinder with groove strips for processing thin and thick material to be cut.
  • the groove part of the groove strip consists of a plastic with low elasticity
  • the cutting knife that penetrates through the material to be cut is subjected to a relatively large resistance.
  • the cutting knife teeth are fully immersed in the groove bar without the groove bar being able to escape.
  • the groove strip By designing the groove strip with an elastic part, it has become possible to absorb the forces caused by the difference in speed of the cutting edge to the groove strip by compressing this elastic part during the cutting process. As a result, the bending stress of the Cutting knife greatly reduced and jamming of the pressure bars avoided. For this reason, thicker cutting knives can be used, which are rigid and have a longer service life. Thinner products can also be cut.
  • the invention has also made it possible to use a material for the groove part of the groove strip which is elastic and abrasion-resistant and nevertheless does not damage the cutting knife as a result of the use of the elastic part.
  • FIG. 1 shows a vertical section through a cross cutting device according to the invention, the useful cylinder 1 and the cutting cylinder 2 being shown only in part and both cylinders 1; 2 revolve in the direction of arrow B at approximately the same peripheral speed.
  • the pressure strips on the cutting cylinder 2 have not been shown for the sake of clarity. This also applies to FIGS. 2 to 5.
  • the cutting cylinder 2 has a cutting knife 6 arranged in the radial direction and with its tip 3 protruding from the circumference 4 of the cutting cylinder 2.
  • the cutting knife 6 is clamped in a known knife bar (not shown).
  • the cutting knife 6 extends in a coaxial direction to the axis of the cutting cylinder 2, not shown.
  • the groove 7 runs in the coaxial direction to the axis of the useful cylinder 1, which is also not shown.
  • the groove 7 is made in two parts and consists of a groove part 8 and a compression spring part 9.
  • the groove part 8 and the compression spring part 9 are loosely next to each other and parallel on the circumference of the utilization cylinder 1 arranged, always so that in the direction of arrow B first the groove part 8 and then the compression spring part 9 is attached.
  • the point 3 of the cutting knife 6 which moves on the flight circle 11 in the direction of the arrow B touches the product strand 13 at point 12 and leaves the product strand 13 again after the cutting operation at point 14.
  • the groove part 8 consists of polyurethane with a hardness of 90 to 95 Shore.
  • the compression spring part 9 consists here for example of polyurethane with a hardness of 60 to 70 Shore.
  • the compression spring part 9 absorbs the forces caused by the difference in speed of the cutting edge to the groove strip by compression during the cutting process. As a result, the bending stress of the cutting knife 6 is greatly reduced and the pressure bars are not jammed.
  • the two strips 8; 9 can preferably be inserted loosely into the groove 7. This has the advantage that only the groove part 8, in which the cutting knife 6 is immersed, has to be replaced as a wearing part.
  • the groove strip 7 is again in two parts, but is made of one material and consists of the groove part 8 and a compression spring part 21.
  • a resilient element 22 is arranged, which is rectangular in cross-section and can also extend in a wavy line in the axial direction.
  • the compression spring part 21 can consist of polyamide 12.
  • the resilient element 22 can consist of steel, polyamide or the like. Material. The effect of the groove 7 is the same as described in FIG. 1.
  • FIG. 3 a further embodiment variant of the groove strip 7 is shown, with FIG. 4 representing view A according to FIG. 3.
  • the groove strip 7 is in two parts, but made of one material, ie the groove part 8 and a compression spring part 23 are firmly connected to one another.
  • the compression spring part 23 has holes 24 which extend in the axial direction and are spaced apart from one another and which increase the elasticity of the groove strip 7.
  • the material can be the same as that used in the groove part 8.
  • the effect is the same as described in Fig. 1.
  • the cutting knife 6 can have a thickness of 2 to 3 mm. Products up to 96 pages can be cut with the same cross cutter.
  • the groove strip 7 is tightly enclosed in a groove running in the radial direction away from the lateral surface on at least three sides, namely on the underside and the two longitudinal sides, and its fourth side, ie the top side, Is flush with the jacket of the useful cylinder 1.
  • the "less elastic” groove part 8 and then the "more elastic” compression spring part 9 is arranged.
  • the groove part 8 can also be integrally connected to the compression spring part 9, e.g. B. glued or welded, or be positively connected. For example, it is possible to interlock the groove part 8 with the compression spring part 9 on the two adjacent longitudinal sides.
  • the groove 7 is made in one piece and has better handling when replacing the same.
  • the compression spring part 9 arranged next to the groove part 8 has approximately the same dimensions as the groove part 8.
  • the cutting knife 6 always strikes the free upper side of the harder groove part 8, which cannot deflect in the radial direction to the axis of the working cylinder 1, since it presses against the bottom of the groove.
  • An elastic dodge is only possible in the direction of the compression spring part 9, which has a lower modulus of elasticity, for. B. a 33 percent lower modulus of elasticity compared to the modulus of elasticity of the groove 7.
  • the rigid knife 6 only occurs very much little wear and tear, so that long service lives are achieved. Both thin and thick products, or rather sections, can be cut equally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

Die Erfindung betrifft eine Querschneideeinrichtung gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a cross cutting device according to the preamble of patent claim 1.

Die gattungsgemäße US-E-17 892 zeigt eine Querschneideeinrichtung an Falzwerken für Rotationsdruckmaschinen. Hierbei ist ein Schneidzylinder mit einem biegesteifen Schneidmesser vorgesehen. Ein mit dem Schneidzylinder zusammenwirkender Nutzylinder weist eine Nutleiste als Widerlager zum Trennen von Schneidgut auf. Die Nutleiste besteht aus einem einteilig ausgebildeten Nutteil und einem Druckfederteil. In Arbeitsdrehrichtung des Nutzylinders gesehen, sind auf seinem Umfang nebeneinander zuerst das Nutteil und dann das Druckfederteil angeordnet. Das Druckfederteil besteht aus einer druckfederbelasteten Schiene.The generic US-E-17 892 shows a cross cutting device on folding units for rotary printing presses. Here, a cutting cylinder with a rigid cutting knife is provided. A working cylinder which interacts with the cutting cylinder has a groove strip as an abutment for separating material to be cut. The groove strip consists of a one-piece groove part and a compression spring part. Seen in the working direction of rotation of the working cylinder, the groove part and then the compression spring part are arranged next to one another on its circumference. The compression spring part consists of a compression spring loaded rail.

Gemäß DE-OS 14 36 520 ist eine Einrichtung zum Schneiden und Übertragen von mehrlagigen Produkten, die aus einer Rotationsdruckmaschine kommen, bekannt, welche einen Schneidzylinder und einen Nutzylinder aufweist.According to DE-OS 14 36 520, a device for cutting and transferring multilayer products that come from a rotary printing press is known, which has a cutting cylinder and a useful cylinder.

Um den in das Falzwerk einlaufenden Papierstrang in einzelne Produkte aufzuteilen, befindet sich im Falzwerk eine Querschneideeinrichtung. Diese Einrichtung besteht ans einem Schneidzylinder mit eingesetztem Messerbalken und Schneidleisten, auch Nutleisten genannt, welche im Nut- oder Nutsammelzylinder eingesetzt sind. Durch das Abrollen des Schneidzylinders mit dem Nutzylinder setzt sich das Schneidmesser auf den einlaufenden Papierstrang auf. Da das Schneidmesser aus der Oberfläche des Schneidzylinders hervorsteht, taucht die Schneidkante des Messers in die Nutleiste des Nutzylinders ein und trennt das Produkt vom Strang. Die Eintauchtiefe des Schneidmessers in die Nutleiste wird durch die Zahnform der Schneidmesserkante festgelegt.In order to divide the paper strand entering the folding unit into individual products, there is a cross cutting device in the folding unit. This facility exists to a cutting cylinder with an inserted cutter bar and cutting strips, also called groove strips, which are inserted in the groove or groove collecting cylinder. By unrolling the cutting cylinder with the working cylinder, the cutting knife sits on the incoming paper strand. Since the cutting knife protrudes from the surface of the cutting cylinder, the cutting edge of the knife dips into the groove of the working cylinder and separates the product from the strand. The depth of immersion of the cutting knife in the slot bar is determined by the tooth shape of the cutting knife edge.

Da das Schneidmesser sich beim Schneidvorgang in der Nutleiste nicht abrollen kann wie ein Zahnrad, da nur ein schmaler Einschnitt vorhanden ist, entstehen an dieser Stelle hohe Belastungen für Nutleiste und Schneidmesser. Bei der Erzeugung von dünnen Produkten wird dieses Problem gelöst, indem man sehr elastische Nutleisten und Messerbalken mit dünnen Schneidmessern einsetzen kann, da ja nur geringe Schnittkräfte vorhanden sind. Die Schneidmesser können die Biegebeanspruchung durch ihre Blattfedereigenschaft ausgleichen, und die sehr elastischen Nutleisten deformieren sich in der Schneidnute, ohne diese zu zerstören. Außerdem sind bei diesen geringen Schnittkräften die Andruckleisten, welche sich rechts und links des Schneidmessers befinden, aus einem hochelastischen Kunststoff mit guter Federungseigenschaft und werden daher beim Schneidvorgang nicht eingeklemmt.
Bei der Erzeugung von dicken Produkten werden Nutleisten mit sehr geringer Elastizität und sehr biegesteifen Schneidmessern sowie unelastische Andruckleisten eingesetzt, welche über Schraubenfedern angedrückt werden. Mit dieser Ausführung der Schneideinrichtung werden die großen Kräfte, die beim Schneidvorgang entstehen, aufgenommen. Diese Ausführung der Schneideinrichtung hat durch ihre Steifigkeit einen schnelleren und größeren Verschleiß von Nutleiste, Schneidmesser und Andruckleisten zur Folge.Since the cutting knife is in the cutting process in the Groove bar cannot roll off like a gear, since there is only a small incision, high loads are created for the groove bar and cutting knife at this point. When producing thin products, this problem is solved by using very elastic groove strips and cutter bars with thin cutting knives, since there are only minimal cutting forces. The cutting blades can compensate for the bending stress due to their leaf spring properties, and the very elastic groove strips deform in the cutting groove without destroying it. In addition, with these low cutting forces, the pressure strips, which are located on the right and left of the cutting knife, are made of a highly elastic plastic with good spring properties and are therefore not pinched during the cutting process.
When producing thick products, grooved strips with very low elasticity and very rigid cutting blades as well as inelastic pressure strips are used, which are pressed on using coil springs. With this design of the cutting device, the large forces that arise during the cutting process are absorbed. Due to its stiffness, this design of the cutting device results in faster and greater wear of the groove strip, cutting knife and pressure strips.

Mit derartigen Schneideinrichtungen müssen jedoch sowohl dünne als auch dicke Produkte bearbeitet werden. Nachteilig dabei ist, daß dann für jede Produktart das Schneidsystem gewechselt werden muß.With such cutting devices, however, both thin and thick products must be processed. The disadvantage here is that the cutting system must then be changed for each type of product.

Der Erfindung liegt die Aufgabe zugrunde, eine Querschneideeinrichtung an Falzwerken für Rollenrotationsdruckmaschinen unter Verwendung eines Schneidezylinders und eines Nutzylinders mit Nutleisten zum Verarbeiten von dünnem und dickem Schneidgut zu schaffen.The invention has for its object to provide a cross cutting device on folding units for web-fed rotary printing presses using a cutting cylinder and a working cylinder with groove strips for processing thin and thick material to be cut.

Die Aufgabe wird erfindungsgemäß durch das Kennzeichen des Patentanspruches 1 gelöst. Zweckmäßige Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.The object is achieved by the characterizing part of patent claim 1. Appropriate embodiments of the invention can be found in the subclaims.

Durch die zweiteilige Ausführung der Nutleiste werden folgende Vorteile erzielt. Dadurch, daß das Nutteil der Nutleiste aus einem Kunststoff mit geringer Elastizität besteht, wird dem Schneidmesser, das durch das Schneidgut dringt, ein verhältnismäßig großer Widerstand entgegengesetzt. Dabei tauchen die Schneidmesserzähne voll in die Nutleiste ein, ohne daß die Nutleiste ausweichen kann.The following advantages are achieved by the two-part design of the groove strip. Because the groove part of the groove strip consists of a plastic with low elasticity, the cutting knife that penetrates through the material to be cut is subjected to a relatively large resistance. The cutting knife teeth are fully immersed in the groove bar without the groove bar being able to escape.

Durch die Ausgestaltung der Nutleiste mit einem Elastikteil ist es möglich geworden, durch die Verdichtung dieses Elastikteils beim Schneidvorgang die Kräfte aufzunehmen, die durch die Differenzgeschwindigkeit der Schneidkante zur Nutleiste entstehen. Dadurch wird die Biegebeanspruchung des Schneidmessers stark vermindert und ein Einklemmen der Druckleisten vermieden. Aus diesem Grunde können dickere Schneidmesser eingesetzt werden, die biegesteif sind und eine höhere Standzeit haben. Es können auch dünnere Produkte geschnitten werden.By designing the groove strip with an elastic part, it has become possible to absorb the forces caused by the difference in speed of the cutting edge to the groove strip by compressing this elastic part during the cutting process. As a result, the bending stress of the Cutting knife greatly reduced and jamming of the pressure bars avoided. For this reason, thicker cutting knives can be used, which are rigid and have a longer service life. Thinner products can also be cut.

Durch die Erfindung ist es auch möglich geworden, für das Nutteil der Nutleiste einen Werkstoff zu verwenden, welcher elastisch und abriebfest ist und trotzdem das Schneidmesser infolge des Einsatzes des Elastikteils nicht beschädigt wird.The invention has also made it possible to use a material for the groove part of the groove strip which is elastic and abrasion-resistant and nevertheless does not damage the cutting knife as a result of the use of the elastic part.

Die Erfindung soll nachstehend an mehreren Ausführungsbeispielen näher erläutert werden.The invention will be explained in more detail below using several exemplary embodiments.

Die zugehörigen Zeichnungen zeigen in

Fig. 1
den Vertikalschnitt durch eine erfindungsgemäße Querschneideeinrichtung, wobei der Schneidzylinder und der Nutzylinder ausschnittsweise dargestellt ist,
Fig. 2
eine weitere Ausführungsvariante,
Fig. 3
eine weitere Ausführungsvariante,
Fig. 4
die Ansicht A nach Fig. 3.
The associated drawings show in
Fig. 1
the vertical section through a cross cutting device according to the invention, the cutting cylinder and the useful cylinder being shown in sections,
Fig. 2
another variant,
Fig. 3
another variant,
Fig. 4
the view A according to FIG. 3.

Gemäß Fig. 1 ist ein Vertikalschnitt durch eine erfindungsgemäße Querschneideeinrichtung gezeigt, wobei der Nutzylinder 1 und der Schneidzylinder 2 nur ausschnittsweise dargestellt ist und beide Zylinder 1; 2 in Pfeilrichtung B mit annähernd gleicher Umfangsgeschwindigkeit umlaufen. Die Andruckleisten auf dem Schneidzylinder 2 sind der besseren Übersicht halber nicht dargestellt worden. Dies trifft auch für die Fig. 2 bis 5 zu. Der Schneidzylinder 2 besitzt ein in radialer Richtung angeordnetes und mit seiner Spitze 3 aus dem Umfang 4 des Schneidzylinders 2 herausragendes Schneidmesser 6. Das Schneidmesser 6 ist in einem bekannten, nicht dargestellten Messerbalken festgeklemmt. Das Schneidmesser 6 erstreckt sich in koaxialer Richtuung zur nicht dargestellten Achse des Schneidzylinders 2.1 shows a vertical section through a cross cutting device according to the invention, the useful cylinder 1 and the cutting cylinder 2 being shown only in part and both cylinders 1; 2 revolve in the direction of arrow B at approximately the same peripheral speed. The pressure strips on the cutting cylinder 2 have not been shown for the sake of clarity. This also applies to FIGS. 2 to 5. The cutting cylinder 2 has a cutting knife 6 arranged in the radial direction and with its tip 3 protruding from the circumference 4 of the cutting cylinder 2. The cutting knife 6 is clamped in a known knife bar (not shown). The cutting knife 6 extends in a coaxial direction to the axis of the cutting cylinder 2, not shown.

Die Nutleiste 7 verläuft in koaxialer Richtung zur ebenfalls nicht dargestellten Achse des Nutzylinders 1. Die Nutleiste 7 ist zweiteilig ausgeführt und besteht aus einem Nutteil 8 und einem Druckfederteil 9. Das Nutteil 8 und das Druckfederteil 9 sind lose nebeneinander und parallel am Umfang des Nutzylinders 1 angeordnet, und zwar immer so, daß in Pfeilrichtung B zuerst das Nutteil 8 und dann das Druckfederteil 9 angebracht ist. Die sich auf dem Flugkreis 11 in Pfeilrichtung B bewegende Spitze 3 des Schneidmessers 6 berührt im Punkt 12 den Produktstrang 13 und verläßt den Produktstrang 13 wieder nach dem Schneidvorgang im Punkt 14.The groove 7 runs in the coaxial direction to the axis of the useful cylinder 1, which is also not shown. The groove 7 is made in two parts and consists of a groove part 8 and a compression spring part 9. The groove part 8 and the compression spring part 9 are loosely next to each other and parallel on the circumference of the utilization cylinder 1 arranged, always so that in the direction of arrow B first the groove part 8 and then the compression spring part 9 is attached. The point 3 of the cutting knife 6 which moves on the flight circle 11 in the direction of the arrow B touches the product strand 13 at point 12 and leaves the product strand 13 again after the cutting operation at point 14.

Das Nutteil 8 besteht aus Polyurethan mit einer Härte von 90 bis 95 Shore. Das Druckfederteil 9 besteht hierbei beispielsweise aus Polyurethan mit einer Härte von 60 bis 70 Shore. Das Druckfederteil 9 nimmt durch Verdichtung beim Schneidvorgang die Kräfte auf, die durch die Differenzgeschwindigkeit der Schneidkante zur Nutleiste entstehen. Dadurch wird die Biegebeanspruchung des Schneidmessers 6 stark vermindert und ein Einklemmen der Druckleisten vermieden. Die beiden Leisten 8; 9 können vorzugsweise lose aneinanderliegend in die Nutleiste 7 eingesetzt werden. Dies hat den Vorteil, daß nur das Nutteil 8, in welchem das Schneidmesser 6 eintaucht, als Verschleißteil gewechselt werden muß.The groove part 8 consists of polyurethane with a hardness of 90 to 95 Shore. The compression spring part 9 consists here for example of polyurethane with a hardness of 60 to 70 Shore. The compression spring part 9 absorbs the forces caused by the difference in speed of the cutting edge to the groove strip by compression during the cutting process. As a result, the bending stress of the cutting knife 6 is greatly reduced and the pressure bars are not jammed. The two strips 8; 9 can preferably be inserted loosely into the groove 7. This has the advantage that only the groove part 8, in which the cutting knife 6 is immersed, has to be replaced as a wearing part.

Gemäß Fig. 2 ist eine weitere Ausführungsvariante gezeigt. Die Nutleiste 7 ist wiederum zweiteilig, jedoch aus einem Material ausgeführt und besteht aus dem Nutteil 8 und einem Druckfederteil 21. Innerhalb des Druckfederteils 21 ist ein federndes Element 22 angeordnet, welches im Querschnitt rechteckig ausgebildet ist und sich in axialer Richtung auch wellenlinienförmig erstrecken kann. Das Druckfederteil 21 kann aus Polyamid 12 bestehen. Das federnde Element 22 kann aus Stahl, Polyamid oder dgl. Material bestehen. Die Wirkung der Nutleiste 7 ist ebenso, wie bei Fig. 1 beschrieben.2 is a further embodiment shown. The groove strip 7 is again in two parts, but is made of one material and consists of the groove part 8 and a compression spring part 21. Inside the compression spring part 21, a resilient element 22 is arranged, which is rectangular in cross-section and can also extend in a wavy line in the axial direction. The compression spring part 21 can consist of polyamide 12. The resilient element 22 can consist of steel, polyamide or the like. Material. The effect of the groove 7 is the same as described in FIG. 1.

Gemäß Fig. 3 ist eine weitere Ausführungsvariante der Nutleiste 7 gezeigt, wobei die Fig. 4 die Ansicht A nach Fig. 3 darstellt. Die Nutleiste 7 ist zweiteilig, jedoch aus einem Material ausgeführt, d. h. das Nutteil 8 und ein Druckfederteil 23 sind fest miteinander verbunden. Das Druckfederteil 23 besitzt sich in axialer Richtung erstreckende, in Abständen voneinander angeordnete Löcher 24, welche die Elastizität der Nutleiste 7 erhöhen. Das Material kann das gleiche sein, wie das beim Nutteil 8 verwendete. Die Wirkung ist die gleiche, wie bei Fig. 1 beschrieben. Das Schneidmesser 6 kann eine Dicke von 2 bis 3 mm aufweisen. Es können Produkte bis zu 96 Seiten mit derselben Querschneideeinrichtung geschnitten werden.According to FIG. 3, a further embodiment variant of the groove strip 7 is shown, with FIG. 4 representing view A according to FIG. 3. The groove strip 7 is in two parts, but made of one material, ie the groove part 8 and a compression spring part 23 are firmly connected to one another. The compression spring part 23 has holes 24 which extend in the axial direction and are spaced apart from one another and which increase the elasticity of the groove strip 7. The material can be the same as that used in the groove part 8. The effect is the same as described in Fig. 1. The cutting knife 6 can have a thickness of 2 to 3 mm. Products up to 96 pages can be cut with the same cross cutter.

Ergänzend zu Fig. 1 wird ausgeführt, daß sich die Nutleiste 7 in einer in radialer Richtung von der Mantelfläche weg verlaufenden Nut mindestens an drei Seiten, nämlich an der Unterseite und den zwei Längsseiten, fest umschlossen ist und ihre vierte Seite, d. h. die Oberseite, bündig ist mit dem Mantel des Nutzylinders 1. Jeweils in Drehrichtung B des Nutzylinders 1 gesehen, ist zuerst das "weniger elastische" Nutteil 8 und anschließend das "elastischere" Druckfederteil 9 angeordnet. Das Nutteil 8 kann mit dem Druckfederteil 9 auch stoffschlüssig verbunden, z. B. verklebt oder verschweißt, oder aber formschlüssig verbunden sein. Z. B. ist es möglich, das Nutteil 8 mit dem Druckfederteil 9 an den beiden aneinanderliegenden Längsseiten miteinander zu verzahnen. Die Nutleiste 7 ist einstückig ausgeführt ist und besitzt eine bessere Handhabung beim Auswechseln derselben. Das neben dem Nutteil 8 angeordnete Druckfederteil 9 weist etwa die gleichen Dimensionen auf wie das Nutteil 8. Das Schneidmesser 6 trifft immer auf die freie obere Seite des härteren Nutteiles 8 auf, welches in radialer Richtung zur Achse des Nutzylinders 1 nicht ausweichen kann, da es gegen den Boden der Nut drückt. Ein elastisches Ausweichen ist nur in Richtung des Druckfederteiles 9 möglich, welches ein geringeres Elastizitätsmodul aufweist, z. B. ein um 33 Prozent geringeres Elastizitätsmodul im Vergleich zum Elastizitätsmodul der Nutleiste 7. Überraschenderweise treten an dem biegesteifen Schneidmesser 6 nur sehr geringe Verschleißerscheinungen auf, so daß hohe Standzeiten erzielt werden. Es können sowohl dünne als auch dicke Produkte, besser gesagt Abschnitte, gleichermaßen geschnitten werden.In addition to FIG. 1, it is stated that the groove strip 7 is tightly enclosed in a groove running in the radial direction away from the lateral surface on at least three sides, namely on the underside and the two longitudinal sides, and its fourth side, ie the top side, Is flush with the jacket of the useful cylinder 1. Each seen in the direction of rotation B of the useful cylinder 1, the "less elastic" groove part 8 and then the "more elastic" compression spring part 9 is arranged. The groove part 8 can also be integrally connected to the compression spring part 9, e.g. B. glued or welded, or be positively connected. For example, it is possible to interlock the groove part 8 with the compression spring part 9 on the two adjacent longitudinal sides. The groove 7 is made in one piece and has better handling when replacing the same. The compression spring part 9 arranged next to the groove part 8 has approximately the same dimensions as the groove part 8. The cutting knife 6 always strikes the free upper side of the harder groove part 8, which cannot deflect in the radial direction to the axis of the working cylinder 1, since it presses against the bottom of the groove. An elastic dodge is only possible in the direction of the compression spring part 9, which has a lower modulus of elasticity, for. B. a 33 percent lower modulus of elasticity compared to the modulus of elasticity of the groove 7. Surprisingly, the rigid knife 6 only occurs very much little wear and tear, so that long service lives are achieved. Both thin and thick products, or rather sections, can be cut equally.

Claims (11)

  1. A transverse cutting device on folding units for web-fed rotary printing machines, comprising a rigid cutting knife (6) arranged on a cutting cylinder (2), and a grooved strip (7), arranged on a grooved cylinder (1), as an abutment for separating material to be cut, the grooved strip (7) comprising a grooved part (8) constructed in one piece, and a pressure spring part (9; 16; 21; 23), and, seen in the direction of movement (B) of the grooved cylinder (1), first the grooved part (8) and then the pressure spring part (9; 16; 21; 23) being arranged next to one another at the periphery of the grooved cylinder (1), and the grooved part (8) of the grooved strip (7) comprising a synthetic material with a low degree of elasticity, characterized in that the pressure spring part (9; 16; 21; 23) is of a synthetic material of a higher degree of elasticity than the grooved part (8).
  2. A transverse cutting device according to Claim 1, characterized in that the grooved part (8) is of an elastomer.
  3. A transverse cutting device according to Claim 1, characterized in that the grooved part (8) is of polyurethane.
  4. A transverse cutting device according to Claim 1, characterized in that the pressure spring part (9) is of an elastomer.
  5. A transverse cutting device according to Claims 1, 4, 5, characterized in that the pressure spring part (9) is of polyurethane.
  6. A transverse cutting device according to Claim 1, characterized in that the pressure spring part (21) is of a thermoplastic synthetic material.
  7. A transverse cutting device according to Claims 1 and 7, characterized in that the pressure spring part (21) is of polyamide in which a resilient element (22) is arranged running in the axial direction.
  8. A transverse cutting device according to Claim 8, characterized in that the resilient element (22) is of steel or a thermoplastic synthetic material, and is constructed in the shape of a wavy line in the direction of its longitudinal axis.
  9. A transverse cutting device according to Claims 1, 8 and 9, characterized in that the resilient element (22) is of polyamide.
  10. A transverse cutting device according to Claim 1, characterized in that the grooved part (8) and the pressure spring part (23) are connected fixedly to one another, and in that the pressure spring part (23) has holes (24) arranged in the axial direction.
  11. A transverse cutting device according to Claim 1, characterized in that the cutting knife (6) has a thickness of 2 to 3 mm.
EP19920110936 1991-07-04 1992-06-27 Transverse cutter device in folders for web-feb rotary presses Expired - Lifetime EP0523435B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4122110 1991-07-04
DE4122110 1991-07-04
DE19924220480 DE4220480A1 (en) 1992-06-25 1992-06-25 Rotary press cutter
DE4220480 1992-06-25

Publications (2)

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EP0523435A1 EP0523435A1 (en) 1993-01-20
EP0523435B1 true EP0523435B1 (en) 1997-02-19

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EP19920110936 Expired - Lifetime EP0523435B1 (en) 1991-07-04 1992-06-27 Transverse cutter device in folders for web-feb rotary presses

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US (2) US5259283A (en)
EP (1) EP0523435B1 (en)
JP (1) JP2595170B2 (en)
DE (1) DE59208046D1 (en)
RU (1) RU2037427C1 (en)

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Also Published As

Publication number Publication date
DE59208046D1 (en) 1997-03-27
US5357831A (en) 1994-10-25
US5259283A (en) 1993-11-09
JPH05200695A (en) 1993-08-10
JP2595170B2 (en) 1997-03-26
RU2037427C1 (en) 1995-06-19
EP0523435A1 (en) 1993-01-20

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