EP1626845B1 - Longitudinal cutting machine with a cooled cutting blade - Google Patents

Longitudinal cutting machine with a cooled cutting blade Download PDF

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Publication number
EP1626845B1
EP1626845B1 EP04721832A EP04721832A EP1626845B1 EP 1626845 B1 EP1626845 B1 EP 1626845B1 EP 04721832 A EP04721832 A EP 04721832A EP 04721832 A EP04721832 A EP 04721832A EP 1626845 B1 EP1626845 B1 EP 1626845B1
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EP
European Patent Office
Prior art keywords
cutter
cutting
cutting machine
blade
nozzle
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
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EP04721832A
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German (de)
French (fr)
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EP1626845A1 (en
Inventor
Rudolf Supe-Dienes
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Dienes Werke fuer Maschinenteile GmbH and Co KG
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Dienes Werke fuer Maschinenteile GmbH and Co KG
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Publication of EP1626845A1 publication Critical patent/EP1626845A1/en
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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
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/10—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/24—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter
    • B26D1/245—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with another disc cutter for thin material, e.g. for sheets, strips or the like
    • 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
    • Y10T83/263—With means to apply transient nonpropellant fluent material to tool or work
    • 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
    • Y10T83/283—With means to control or modify temperature of apparatus or work
    • Y10T83/293—Of tool

Definitions

  • the invention relates to a longitudinal cutting machine for cutting a material web guided by the longitudinal cutting machine, the longitudinal cutting machine being provided with a cutting arrangement having at least one upper knife for the material web guided by the cutting arrangement via the cutting point formed by the upper knife and a nozzle aligned with the outer cutter for passing a cooling medium is provided.
  • a longitudinal cutting machine with the generic features is in the DE 303 958 C described in which a blower or the like is mounted in front of the cutting blades, which drives an air flow through the blades.
  • a blower or the like is mounted in front of the cutting blades, which drives an air flow through the blades.
  • the knives are cooled as a result of the passing air flow and the paper web is cleaned by blowing off the dust.
  • the invention is therefore based on the object to provide a longitudinal cutting machine with the generic features available, which allows a better cutting result in temperature-sensitive materials, even at high cutting speeds.
  • Allen embodiments of the invention is peculiar that it is possible by bringing the nozzle to the upper blade in an advantageous manner to cool the knife blade of the upper blade by applying a suitable cooling medium or the temperature of the knife blade during the cutting process below a longitudinal cutting machine Keep set temperature, so that even at very high cutting speeds, which is to be assumed by an increasing heating of the material to be cut web in the cutting point, adhesions of components of the cut material web are avoided on the knife blade. Since only the knife blade is to be kept cold, the energy consumption must be kept within appropriate limits.
  • these nozzles are not superficially a targeted point-like jet, but the application of at least one flat, adjoining the knife edge area of the knife blade, including the corresponding nozzles, for example, a slot-shaped outlet for the cooling medium can have.
  • a plurality of distributed over the circumference of the circular blade blade arranged, directed to the knife blade nozzles is provided;
  • a nozzle extending over the circumference of the circular blade blade and designed in the manner of an annular gap is provided.
  • the knife is designed as a long blade and a plurality of over the length of the knife edge of the long blade spaced apart nozzles provided is;
  • the knife is designed as a long knife and that over the length of the knife edge extending slot-shaped nozzle is provided.
  • the nozzle for the cooling medium to be passed through is aligned with the inner side of the knife blade, which bears against the lower blade in the case of a shear cut; Since the occurrence of adhesions of the material web is the most probable, especially in this cutting region, the invention uses cooling of the inside of the knife blade.
  • the knife blade of the upper blade can be acted upon by the cooling medium by nozzles arranged on its two sides.
  • a nozzle assembly is set up to act on several knife blades. Such an arrangement is particularly suitable for very narrow cutting widths.
  • To support the correspondingly cold knife held according to an embodiment of the invention can be provided to cool the web at the cutting point itself by a directly aligned to the cutting point nozzle.
  • the upper blade including the nozzle aligned with its blade blade, is enclosed by a housing, it being possible to provide that an exhaust device for the applied cooling medium is connected to the housing.
  • the housing with an associated nozzle assembly corresponding to a plurality of knife blades can be included.
  • the blade blade is associated with a temperature sensor for detecting the respective temperature of the upper blade.
  • At least one nozzle is aligned with the material web in its region before passing through the cutting point area, so that in addition to the cooling of the knife blade and the temperature of the material web before entering the cutting assembly is lowered.
  • At least one nozzle is aligned with the region of the already cut material web located behind the cutting point and enclosing the cutting edge in the material web. So far as at a standstill of the slitter the just separated by the knife assembly parts of the material web can stick together again at their cutting edges, also causes a certain embrittlement in the transport direction of the web behind the cutting arrangement cooling the web so that when re-start the web the cut Parts of the web are separated automatically.
  • cooled air, an inert cooling gas, a liquid nitrogen or else a liquid carbon dioxide can be supplied as cooling medium; other suitable media can be used within the scope of the invention.
  • a top knife designed as a circular knife 12 is held on a knife holder 10 by means of a lowering device 11 and is enclosed by a hand guard 13.
  • the knife blade 14 of the circular blade 12 is associated with a lower blade 15 such that there is a cutting point 16 through which a web of material 17 is guided in the direction indicated by the arrow 18 transport direction.
  • Distributed over the circumference of the knife blade 14 a plurality of nozzles 19 are arranged and aligned with the knife blade 14 to cool by means of passage of a suitable cooling medium through the nozzles 19, the knife blade 14, so that only the cooled knife edge comes into contact with the web 17.
  • a suitable cooling medium through the nozzles 19
  • the knife blade 14 so that only the cooled knife edge comes into contact with the web 17.
  • a further alternative is shown for simplicity, in which instead of the individual nozzles 19 a circumferentially circumferential annular gap 20 is arranged so that each of the entire circumference of the blade 14 can be flowed through the annular gap 20 with the cooling medium.
  • a cooling bar 21 with correspondingly associated cooling nozzles 22 extends in a direction parallel to the material web 17 in the transport direction 18 of the web 17 behind the cutting point 16.
  • the area of the material web 17 which already encompasses the material web 17 and which has already been cut in the material web 17 is cooled, and hereby it is achieved in a particularly advantageous manner that the material web behind the web cools off Cutting point 16 enters a certain embrittlement of the web 17, so that automatically separate from each other after a possible stoppage of the slitter in a renewed start of the web, the cut parts of the web.
  • FIG. 4 an embodiment of the invention can be seen in Fig. 4, according to which the knife to be cooled is formed as a long blade 24, wherein distributed over the length of the knife edge 25 a plurality of nozzles 19 for cooling the long blade 24 is arranged. Similar to the embodiment described with reference to FIG. 1, it can also be provided in this exemplary embodiment-as not shown-that a slit-shaped nozzle extending over the length of the knife edge 25 of the long knife 24 is provided for applying the cooling medium to the knife blade.
  • cooling media no restrictions are recognizable; For example, an inert cooling gas, liquid nitrogen, liquid carbon dioxide or cooled air can be used and in this respect the slitter be fed.
  • an air cooling for example, be provided, the air only in the area of the longitudinal cutting machine by arranging To cool expansion nozzles to the required low temperature.
  • it must be ensured by appropriate control or fine dosing of the use of the respective cooling medium that no icing of the knife blade or the formation of condensation occurs, which would disturb the cutting process or impair the product quality.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)

Description

Die Erfindung betrifft eine Längsschneidemaschine zum Schneiden einer durch die Längsschneidemaschine geführten Materialbahn, wobei die Längsschneidemaschine mit einer wenigstens ein Obermesser aufweisenden Schneidanordnung für die durch die Schneidanordnung über den vom Obermesser gebildeten Schneidpunkt geführte Materialbahn versehen ist und eine auf das Obermesser ausgerichtete Düse zur Durchleitung eines Kühlmediums vorgesehen ist.The invention relates to a longitudinal cutting machine for cutting a material web guided by the longitudinal cutting machine, the longitudinal cutting machine being provided with a cutting arrangement having at least one upper knife for the material web guided by the cutting arrangement via the cutting point formed by the upper knife and a nozzle aligned with the outer cutter for passing a cooling medium is provided.

Bei derartigen Längsschneidemaschinen treten Anwendungen auf, im Rahmen derer das zu zerteilende Material in Abhängigkeit von der Umgebungstemperatur den Schneidvorgang mehr oder weniger beeinträchtigt. So bleiben beispielsweise bei dem Schneiden von mit einem Klebematerial beschichteten Materialbahnen häufige Materialreste an den Messern kleben, wobei auch die am Schneidpunkt durch die Schneidreibung ansteigende Temperatur das Schneidergebnis beeinträchtigen kann, was insbesondere für die angestrebten hohen Schneidgeschwindigkeiten gilt.In such slitters applications occur, in which the material to be divided depending on the ambient temperature more or less affected the cutting process. Thus, for example, in the cutting of material webs coated with an adhesive material, frequent remnants of material stick to the blades, whereby the temperature rising at the cutting point by the cutting friction can impair the cutting result, which is especially true for the desired high cutting speeds.

Eine Längsschneidmaschine mit den gattungsgemäßen Merkmalen ist in der DE 303 958 C beschrieben, bei welcher bereits vor den Schneidmessern ein Gebläse oder dergleichen angebracht ist, welches einen Luftstrom durch die Messer treibt. Soweit die bekannte Längsschneidmaschine zum Schneiden von Papier eingesetzt werden soll, sind als damit verbundene Vorteile genannt, dass die Messer in Folge des durchziehenden Luftstromes gekühlt werden und die Papierbahn durch Abblasen des Staubes gereinigt wird. Es liegt allerdings auf der Hand, dass mit der Anordnung eines Gebläses in einer gewissen Entfernung vor der Messeranordnung keine solchen Kühlleistungen erzielbar sind, dass eine derartige Längsschneidemaschine ohne weiteres zum Schneiden von temperaturempfindlichen Materialien einsetzbar ist.A longitudinal cutting machine with the generic features is in the DE 303 958 C described in which a blower or the like is mounted in front of the cutting blades, which drives an air flow through the blades. As far as the known slitter is to be used for cutting paper, as associated advantages are mentioned that the knives are cooled as a result of the passing air flow and the paper web is cleaned by blowing off the dust. However, it is obvious that with the arrangement of a fan at a certain distance in front of the knife assembly no such cooling performance can be achieved that such a longitudinal cutting machine is readily usable for cutting temperature-sensitive materials.

Der gleiche Nachteil gilt für die in den Druckschriften DE 44 25 666 A , DE 21 64 554 A sowie DE 32 19 774 A beschriebenen Längsschneidemaschinen, bei denen jeweils eine Absauganlage für den beim Schneidvorgang entstehenden Staub vorgesehen ist. Bei einer solchen Absauganlage stellt sich zwar auch ein wie bei der DE 303 958 C kühlender Luftstrom durch die Längsschneidemaschine ein, jedoch reicht dessen, in den vorgenannten Druckschriften nicht weiter angesprochene Kühlwirkung ebenfalls nicht für das Schneiden temperaturempfindlicher Materialien aus.The same disadvantage applies to those in the publications DE 44 25 666 A . DE 21 64 554 A such as DE 32 19 774 A described longitudinal cutting machines, in each of which an extraction system is provided for the dust generated during the cutting process. In such a suction system is indeed synonymous as in the DE 303 958 C cooling air flow through the slitter, but sufficient, not mentioned in the aforementioned publications cooling effect also not for cutting temperature-sensitive materials.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Längsschneidemaschine mit den gattungsgemäßen Merkmalen zur Verfügung zu stellen, die ein besseres Schneidergebnis bei temperaturempfindlichen Materialien auch bei hohen Schneidgeschwindigkeiten ermöglicht.The invention is therefore based on the object to provide a longitudinal cutting machine with the generic features available, which allows a better cutting result in temperature-sensitive materials, even at high cutting speeds.

Die Erfindung ist in den Ansprüchen 1-4 definiert.The invention is defined in claims 1-4.

Die Lösung dieser Aufgabe ergibt sich einschließlich vorteilhafter Ausgestaltungen und Weiterbildungen der Erfindung aus dem Inhalt der Patentansprüche, welche dieser Beschreibung nachgestellt sind.The solution to this problem arises, including advantageous refinements and developments of the invention from the content of the claims, which are adjusted to this description.

Allen Ausführungsformen der Erfindung ist zu eigen, dass es durch das Heranbringen der Düse an das Obermesser in vorteilhafter Weise gelingt, bei einer Längsschneidemaschine das Messerblatt des Obermessers durch Beaufschlagen mit einem geeigneten Kühlmedium zu kühlen bzw. die Temperatur des Messerblattes auch während des Schneidvorganges unterhalb einer eingestellten Temperatur zu halten, so dass auch bei sehr hohen Schneidgeschwindigkeiten, bei denen von einer zunehmenden Erwärmung der zu schneidenden Materialbahn im Schneidpunkt auszugehen ist, Anhaftungen von Bestandteilen der geschnittenen Materialbahn an dem Messerblatt vermieden sind. Da lediglich das Messerblatt kalt zu halten ist, ist auch der Energieaufwand in entsprechenden Grenzen zu halten. Soweit für das Aufbringen des Kühlmediums Düsen vorgesehen sind, geht es bei diesen Düsen vordergründig nicht um einen gezielten punktförmigen Strahl, sondern um die Beaufschlagung wenigstens eines flächigen, an die Messerschneide anschließenden Bereiches des Messerblattes, wozu die entsprechenden Düsen beispielsweise einen schlitzförmigen Austritt für das Kühlmedium aufweisen können.Allen embodiments of the invention is peculiar that it is possible by bringing the nozzle to the upper blade in an advantageous manner to cool the knife blade of the upper blade by applying a suitable cooling medium or the temperature of the knife blade during the cutting process below a longitudinal cutting machine Keep set temperature, so that even at very high cutting speeds, which is to be assumed by an increasing heating of the material to be cut web in the cutting point, adhesions of components of the cut material web are avoided on the knife blade. Since only the knife blade is to be kept cold, the energy consumption must be kept within appropriate limits. As far as nozzles are provided for the application of the cooling medium, these nozzles are not superficially a targeted point-like jet, but the application of at least one flat, adjoining the knife edge area of the knife blade, including the corresponding nozzles, for example, a slot-shaped outlet for the cooling medium can have.

Gemäß unabhängigen Ausführungsformen der Erfindung ist vorgesehen, daß eine Mehrzahl von über den Umfang des kreisförmigen Messerblattes verteilt angeordneten, auf das Messerblatt gerichteten Düsen vorgesehen ist; alternativ kann auch vorgesehen sein, daß eine sich über den Umfang des kreisförmigen Messerblattes erstreckende, nach Art eines Ringspaltes ausgebildete Düse vorgesehen ist.According to independent embodiments of the invention it is provided that a plurality of distributed over the circumference of the circular blade blade arranged, directed to the knife blade nozzles is provided; Alternatively, it can also be provided that a nozzle extending over the circumference of the circular blade blade and designed in the manner of an annular gap is provided.

Neben der Ausbildung des Obermessers als Kreismesser ist auch eine Ausbildung als Langmesser denkbar, und insoweit ist in einer weiteren Ausführungsform der Erfindung vorgesehen, daß das Messer als Langmesser ausgebildet ist und eine Mehrzahl von über die Länge der Messerschneide des Langmessers im Abstand zueinander angeordneten Düsen vorgesehen ist; alternativ kann auch hierzu vorgesehen sein, daß das Messer als Langmesser ausgebildet ist und daß eine sich über die Länge der Messerschneide erstreckende schlitzförmige Düse vorgesehen ist.In addition to the training of the upper knife as a circular blade training as a long knife is conceivable, and insofar provided in a further embodiment of the invention that the knife is designed as a long blade and a plurality of over the length of the knife edge of the long blade spaced apart nozzles provided is; Alternatively, it can also be provided for this purpose that the knife is designed as a long knife and that over the length of the knife edge extending slot-shaped nozzle is provided.

Nach einem Ausführungsbeispiel der Erfindung ist vorgesehen, dass die Düse für das durchzuleitende Kühlmedium auf die bei Scherenschnitt gegen das Untermesser anliegende Innenseite des Messerblattes ausgerichtet ist; da insbesondere in diesem Schneidbereich das Auftreten von Anhaftungen der Materialbahn am wahrscheinlichsten ist, setzt die Erfindung hier durch Kühlung der Innenseite des Messerblattes an.According to one embodiment of the invention, it is provided that the nozzle for the cooling medium to be passed through is aligned with the inner side of the knife blade, which bears against the lower blade in the case of a shear cut; Since the occurrence of adhesions of the material web is the most probable, especially in this cutting region, the invention uses cooling of the inside of the knife blade.

Gemäß einem Ausführungsbeispiel der Erfindung ist vorgeschlagen, dass das Messerblatt des Obermessers von auf seinen beiden Seiten angeordneten Düsen mit dem Kühlmedium beaufschlagbar ist.According to one exemplary embodiment of the invention, it is proposed that the knife blade of the upper blade can be acted upon by the cooling medium by nozzles arranged on its two sides.

Alternativ oder auch zusätzlich kann vorgesehen sein, im besonderen die Messerschneide zu kühlen, und hierzu ist nach einem Ausführungsbeispiel der Erfindung vorgesehen, dass wenigstens eine Düse in radialer Anordnung zum Messerblatt auf die Messerschneide ausgerichtet ist.Alternatively or additionally, it may be provided to cool the knife edge in particular, and for this purpose is provided according to an embodiment of the invention that at least one nozzle is aligned in a radial arrangement to the knife blade on the knife edge.

Nach einem Ausführungsbeispiel der Erfindung ist vorgesehen, daß bei mit geringem Abstand zueinander angeordeten Messerblättern eine Düsenanordnung zur Beaufschlagung mehrerer Messerblätter eingerichtet ist. Eine derartige Anordnung ist besonders für sehr schmale Schnittbreiten geeignet.According to one embodiment of the invention, it is provided that at a small distance angeordeten knife blades a nozzle assembly is set up to act on several knife blades. Such an arrangement is particularly suitable for very narrow cutting widths.

Zur Unterstützung des entsprechend kalt gehaltenen Messers kann nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, die Materialbahn am Schneidpunkt selbst durch eine unmittelbar auf den Schneidpunkt ausgerichtete Düse zu kühlen.To support the correspondingly cold knife held according to an embodiment of the invention can be provided to cool the web at the cutting point itself by a directly aligned to the cutting point nozzle.

Nach einem Ausführungsbeispiel der Erfindung ist vorgesehen, dass das Obermesser einschließlich der auf dessen Messerblatt ausgerichteten Düse von einem Gehäuse umschlossen ist, wobei vorgesehen sein kann, dass an das Gehäuse eine Absaugvorrichtung für das aufgebrachte Kühlmedium angeschlossen ist. Soweit bei einem schon angesprochenen Ausführungsbeispiel der Erfindung mit geringem Abstand zueinander angeordnete Messerblätter vorgesehen sind, kann das Gehäuse mit einer zugehörigen Düsenanordnung entsprechend mehrere Messerblätter in sich einschließen.According to one exemplary embodiment of the invention, it is provided that the upper blade, including the nozzle aligned with its blade blade, is enclosed by a housing, it being possible to provide that an exhaust device for the applied cooling medium is connected to the housing. As far as provided in an already mentioned embodiment of the invention with a small distance from each other arranged knife blades, the housing with an associated nozzle assembly corresponding to a plurality of knife blades can be included.

Im Hinblick auf die Steuerung des Einsatzes des Kühlmediums kann vorgesehen sein, dass dem Messerblatt ein Temperatursensor zur Erfassung der jeweiligen Temperatur des Obermessers zugeordnet ist.With regard to the control of the use of the cooling medium can be provided that the blade blade is associated with a temperature sensor for detecting the respective temperature of the upper blade.

Es kann vorgesehen sein, dass wenigstens eine Düse auf die Materialbahn in ihrem vor Durchlauf durch den Schneidpunkt gelegenen Bereich ausgerichtet ist, damit ergänzend zu der Kühlung des Messerblattes auch die Temperatur der Materialbahn vor Eintritt in die Schneidanordnung absenkbar ist.It can be provided that at least one nozzle is aligned with the material web in its region before passing through the cutting point area, so that in addition to the cooling of the knife blade and the temperature of the material web before entering the cutting assembly is lowered.

In einer besonderen Ausführungsform der Erfindung kann vorgesehen sein, dass wenigstens eine Düse auf den hinter dem Schneidpunkt gelegenen und die Schnittkante in der Materialbahn einfassenden Bereich der bereits geschnittenen Materialbahn ausgerichtet ist. Soweit nämlich bei einem Stillstand der Längsschneidemaschine die soeben durch die Messeranordnung getrennten Teile der Materialbahn an ihren Schnittkanten wieder zusammenkleben können, bewirkt eine auch in Transportrichtung der Materialbahn hinter der Schneidanordnung erfolgende Abkühlung der Materialbahn eine gewisse Versprödung, so dass beim erneuten Anlauf der Materialbahn die geschnittenen Teile der Materialbahn sich selbsttätig voneinander trennen.In a particular embodiment of the invention it can be provided that at least one nozzle is aligned with the region of the already cut material web located behind the cutting point and enclosing the cutting edge in the material web. So far as at a standstill of the slitter the just separated by the knife assembly parts of the material web can stick together again at their cutting edges, also causes a certain embrittlement in the transport direction of the web behind the cutting arrangement cooling the web so that when re-start the web the cut Parts of the web are separated automatically.

Nach Ausführungsbeispielen der Erfindung kann als Kühlmedium gekühlte Luft, ein inertes Kühlgas, ein flüssiger Stickstoff oder auch ein flüssiges Kohlendioxid zugeleitet werden; weitere geeignete Medien sind im Rahmen der Erfindung einsetzbar.According to exemplary embodiments of the invention, cooled air, an inert cooling gas, a liquid nitrogen or else a liquid carbon dioxide can be supplied as cooling medium; other suitable media can be used within the scope of the invention.

In der Zeichnung sind Ausführungsbeispiele der Erfindung wiedergegeben, welche nachstehend beschrieben sind. Es zeigen:

Fig. 1
eine Schneidanordnung bestehend aus einem an einem Messerhalter gehalterten, als Kreismesser ausgebildeten Obermesser, und aus einem zugeordneten Untermesser mit einer Mehrzahl von Einzeldüsen bzw. einer einzigen Ringspaltdüse,
Fig. 2
die Schneidanordnung gemäß Fig. 1 mit einem zusätzlichen, vor dem Durchlauf durch die Schneidanordnung angeordneten Kühlbereich für die Materialbahn,
Fig. 3
die Schneidanordnung gemäß Fig. 1 mit einem zusätzlichen, hinter dem Durchlauf durch die Schneidanordnung angeordneten Kühlbereich für die Materialbahn,
Fig. 4
ein für eine Schneidanordnung geeignetes Langmesser mit Kühldüsen.
In the drawings, embodiments of the invention are shown, which are described below. Show it:
Fig. 1
a cutting assembly consisting of a holder supported on a knife holder, designed as a circular knife upper blade, and from an associated lower blade having a plurality of individual nozzles or a single annular die,
Fig. 2
1 with an additional cooling region for the material web arranged before passing through the cutting arrangement,
Fig. 3
1 with an additional cooling region for the material web arranged behind the passage through the cutting arrangement,
Fig. 4
a suitable for a cutting assembly long knife with cooling nozzles.

Wie sich aus Fig. 1 zunächst ergibt, ist an einem Messerhalter 10 mittels einer Absenkvorrichtung 11 ein als Kreismesser 12 ausgebildetes Obermesser gehaltert, welches von einem Handschutz 13 umschlossen ist. Dem Messerblatt 14 des Kreismessers 12 ist ein Untermesser 15 derart zugeordnet, daß sich ein Schneidpunkt 16 ergibt, durch den eine Materialbahn 17 in der durch den Pfeil 18 angegebenen Transportrichtung geführt ist. Über den Umfang des Messerblattes 14 verteilt sind mehrere Düsen 19 angeordnet und auf das Messerblatt 14 ausgerichtet, um mittels Durchleitung eines geeigneten Kühlmediums durch die Düsen 19 das Messerblatt 14 zu kühlen, so dass jeweils nur die gekühlte Messerschneide in Kontakt mit der Materialbahn 17 kommt. Wie sich aus der beigefügten Skizze gemäß Fig. 1a ergibt, können auch zu beiden Seiten des Messerblattes 14 auf dieses entsprechende Düsen zur Durchleitung des Kühlmediums ausgebildet sein, so daß wie mit den Pfeilen 30 angedeutet, beidseitig ein entsprechendes Kühlmedium auf das Messerblatt 14 gerichtet sein kann.As is first apparent from FIG. 1, a top knife designed as a circular knife 12 is held on a knife holder 10 by means of a lowering device 11 and is enclosed by a hand guard 13. The knife blade 14 of the circular blade 12 is associated with a lower blade 15 such that there is a cutting point 16 through which a web of material 17 is guided in the direction indicated by the arrow 18 transport direction. Distributed over the circumference of the knife blade 14 a plurality of nozzles 19 are arranged and aligned with the knife blade 14 to cool by means of passage of a suitable cooling medium through the nozzles 19, the knife blade 14, so that only the cooled knife edge comes into contact with the web 17. As is apparent from the attached sketch according to FIG. 1a, can also be formed on both sides of the blade 14 on this corresponding nozzle for the passage of the cooling medium, so that as indicated by the arrows 30, be directed on both sides a corresponding cooling medium to the knife blade 14 can.

In Fig. 1 ist der Einfachheit halber eine weitere Alternative dargestellt, bei welcher anstelle der einzelnen Düsen 19 eine in Umfangsrichtung umlaufende Ringspaltdüse 20 angeordnet ist, so daß jeweils der gesamte Umfang des Messerblattes 14 über die Ringspaltdüse 20 mit dem Kühlmedium angeströmt werden kann.In Fig. 1, a further alternative is shown for simplicity, in which instead of the individual nozzles 19 a circumferentially circumferential annular gap 20 is arranged so that each of the entire circumference of the blade 14 can be flowed through the annular gap 20 with the cooling medium.

Wie sich aus Fig. 2 ergibt, kann vorgesehen sein, daß in Transportrichtung 18 der Materialbahn 17 vor dem Schneidpunkt 16 eine zusätzliche Kühlung der Materialbahn 17 erfolgt, indem ein Kühlbalken 21 mit einer Mehrzahl von darin angeordneten Kühldüsen 22 parallel zur Oberfläche der Materialbahn 17 angeordnet ist. Bei dieser Ausführungsform erfolgt zusätzlich zu der weiterhin beibehaltenen Kühlung des Messers 12 eine Kühlung der Materialbahn 17.As is apparent from Fig. 2, it can be provided that in the transport direction 18 of the web 17 before the cutting point 16, an additional cooling of the web 17 by a cooling bar 21 with a plurality of cooling nozzles 22 arranged therein parallel to the surface of the web 17 is. In this embodiment, in addition to the cooling of the knife 12, which is still maintained, cooling of the material web 17 takes place.

Wie aus Fig. 3 ersichtlich ist, ist nach einem Ausführungsbeispiel der Erfindung vorgesehen, daß ein Kühlbalken 21 mit entsprechend zugeordneten Kühldüsen 22 sich in einer parallelen Ausrichtung zur Materialbahn 17 in Transportrichtung 18 der Materialbahn 17 hinter den Schneidpunkt 16 erstreckt. Somit wird der die in der Materialbahn 17 bereits eingeschnittene Schnittkante umfassende Bereich der Materialbahn 17 gekühlt, und hiermit wird in einer besonders vorteilhaften Weise erreicht, daß mit der Abkühlung der Materialbahn hinter dem Schneidpunkt 16 eine gewisse Versprödung der Materialbahn 17 eintritt, so daß nach einem eventuellen Stillstand der Längsschneidemaschine bei einem erneuten Anlauf der Materialbahn sich die geschnittenen Teile der Materialbahn selbsttätig voneinander trennen.As is apparent from Fig. 3, it is provided according to an embodiment of the invention that a cooling bar 21 with correspondingly associated cooling nozzles 22 extends in a direction parallel to the material web 17 in the transport direction 18 of the web 17 behind the cutting point 16. Thus, the area of the material web 17 which already encompasses the material web 17 and which has already been cut in the material web 17 is cooled, and hereby it is achieved in a particularly advantageous manner that the material web behind the web cools off Cutting point 16 enters a certain embrittlement of the web 17, so that automatically separate from each other after a possible stoppage of the slitter in a renewed start of the web, the cut parts of the web.

Weiterhin ist in Fig. 4 ein Ausführungsbeispiel der Erfindung erkennbar, gemäß welchem das zu kühlende Messer als Langmesser 24 ausgebildet ist, wobei über die Länge von dessen Messerschneide 25 verteilt eine Mehrzahl von Düsen 19 zur Kühlung des Langmessers 24 angeordnet ist. Ähnlich der zu Fig. 1 beschriebenen Ausbildung kann auch bei diesem Ausführungsbeispiel - wie nicht weiter dargestellt - vorgesehen sein, daß eine sich über die Länge der Messerschneide 25 des Langmessers 24 erstreckende schlitzförmig ausgebildete Düse zum Aufbringen des Kühlmediums auf das Messerblatt vorgesehen ist.Furthermore, an embodiment of the invention can be seen in Fig. 4, according to which the knife to be cooled is formed as a long blade 24, wherein distributed over the length of the knife edge 25 a plurality of nozzles 19 for cooling the long blade 24 is arranged. Similar to the embodiment described with reference to FIG. 1, it can also be provided in this exemplary embodiment-as not shown-that a slit-shaped nozzle extending over the length of the knife edge 25 of the long knife 24 is provided for applying the cooling medium to the knife blade.

Hinsichtlich des Einsatzes von Kühlmedien sind keine Einschränkungen erkennbar; beispielsweise können ein inertes Kühlgas, flüssiger Stickstoff, flüssiges Kohlendioxid oder auch gekühlte Luft verwendet und insoweit der Längsschneidemaschine zugeleitet werden. Bei dem Einsatz einer Luftkühlung kann beispielsweise auch vorgesehen sein, die Luft erst im Bereich der Längsschneidemaschine durch Anordnung von Expansionsdüsen auf die erforderliche niedrige Temperatur zu kühlen. Bei dem Einsatz aller Kühlmedien ist durch eine entsprechende Steuerung bzw. Feindosierung des Einsatzes des betreffenden Kühlmediums darauf zu achten, daß keine Vereisung des Messerblattes oder auch die Bildung von Kondenswasser eintritt, die den Schneidprozeß stören bzw. die Produktqualität beeinträchtigen würden.With regard to the use of cooling media, no restrictions are recognizable; For example, an inert cooling gas, liquid nitrogen, liquid carbon dioxide or cooled air can be used and in this respect the slitter be fed. When using an air cooling, for example, be provided, the air only in the area of the longitudinal cutting machine by arranging To cool expansion nozzles to the required low temperature. When using all cooling media, it must be ensured by appropriate control or fine dosing of the use of the respective cooling medium that no icing of the knife blade or the formation of condensation occurs, which would disturb the cutting process or impair the product quality.

Claims (15)

  1. Longitudinal cutting machine for cutting a sheet of material (17) conveyed through the longitudinal cutting machine, with a cutter arrangement, which is provided with at least an upper cutter (12), for the sheet of material (17), which is conveyed through the cutting arrangement across the cutting (16) point formed by the upper cutter (12), and with at least one nozzle (19, 20), which is directed onto the upper cutter (12), for conveying a cooling medium, characterized in that a plurality of nozzles are distributed over the periphery of the circular cutter blade (14) and are directed onto the cutter blade (14).
  2. Longitudinal cutting machine for cutting a sheet of material (17) conveyed through the longitudinal cutting machine, with a cutter arrangement, which is provided with at least an upper cutter (12), for the sheet of material (17), which is conveyed through the cutting arrangement across the cutting (16) point formed by the upper cutter (12), and with at least one nozzle (19, 20), which is directed onto the upper cutter (12), for conveying a cooling medium, characterized in that a single nozzle (20) is provided that extends over the periphery of the circular cutter blade (14) and is embodied in the manner of a slotted nozzle.
  3. Longitudinal cutting machine for cutting a sheet of material (17) conveyed through the longitudinal cutting machine, with a cutter arrangement, which is provided with at least an upper cutter (12), for the sheet of material (17), which is conveyed through the cutting arrangement across the cutting (16) point formed by the upper cutter (12), and with at least one nozzle (19, 20), which is directed onto the upper cutter (12), for conveying a cooling medium, characterized in that the blade is embodied as a longitudinal blade (24) and is provided with a plurality of spaced-apart nozzles (19) disposed over the length of the cutting edge (25) of the longitudinal blade(24).
  4. Longitudinal cutting machine for cutting a sheet of material (17) conveyed through the longitudinal cutting machine, with a cutter arrangement, which is provided with at least an upper cutter (12), for the sheet of material (17), which is conveyed through the cutting arrangement across the cutting (16) point formed by the upper cutter (12), and with at least one nozzle (19, 20), which is directed onto the upper cutter (12), for conveying a cooling medium, characterized in that the blade is embodied as a longitudinal blade (24), and in that a single slotted nozzle extends over the length of the cutting edge (25).
  5. Longitudinal cutting machine according to one of the Claims 1 to 4, characterized in that the nozzles (19) for the cooling medium that is to be conveyed through are directed onto the inner side of the cutter blade that during shearing cut rests against the lower cutter(15).
  6. Longitudinal cutting machine according to one of the Claims 1 to 5 characterized in that cooling medium can be supplied to the cutter blade (14) by nozzles (19) disposed on both sides thereof.
  7. Longitudinal cutting machine according to one of the Claims 1 to 6, characterized in that at least one nozzle (19) is radially directed onto the cutting edge (25) relative to the cutter blade (14).
  8. Longitudinal cutting machine according to one of the Claims 1 to 7, characterized in that with closely spaced-apart cutter blades (14), a nozzle arrangement for supplying a plurality of cutter blades (14) is provided.
  9. Longitudinal cutting machine according to one of the Claims 1 to 8, characterized in that a nozzle (19) is directed directly against the cutting point (16).
  10. Longitudinal cutting machine according to one of the Claims 1 to 9, characterized in that the upper cutter (12, 24), including the nozzles (19) directed onlo the cutter blade (14) thereof, is surrounded by a housing.
  11. Longitudinal cutting machine according to the Claims 10, characterized in that a vacuum device for the cooling medium that is applied is connected to the housing.
  12. Longitudinal cutting machine according to one of the Claims 1 to 11, characterized in that with slightly spaced-apart cutter blades (14), the housing, including the associated nozzle arrangement, surrounds a plurality of cutter blades (14).
  13. Longitudinal cutting machine according to one of the Claims 1 to 12, characterized in that a temperature sensor for detecting the respective temperature of the upper cutter (12, 24) is associated with the cutter blade (14).
  14. Longitudinal cutting machine according to one of the Claims 1 to 13, characterized in that at least one nozzle (22) is directed against the sheet of material (17) in that region thereof disposed upstream of where it passes across the cutting point (16).
  15. Longitudinal cutting machine according to one of the Claims 1 to 14, characterized in that at least one nozzle (22) is directed against that region of the already cut sheet of material (17) that is disposed downstream of the cutting point (16) and includes the cut edge in the sheet of material (17).
EP04721832A 2003-05-22 2004-03-19 Longitudinal cutting machine with a cooled cutting blade Expired - Lifetime EP1626845B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003123753 DE10323753B4 (en) 2003-05-22 2003-05-22 Longitudinal cutting machine with cooled cutting region
PCT/EP2004/002871 WO2004103655A1 (en) 2003-05-22 2004-03-19 Longitudinal cutting machine with a cooled cutting blade

Publications (2)

Publication Number Publication Date
EP1626845A1 EP1626845A1 (en) 2006-02-22
EP1626845B1 true EP1626845B1 (en) 2007-11-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04721832A Expired - Lifetime EP1626845B1 (en) 2003-05-22 2004-03-19 Longitudinal cutting machine with a cooled cutting blade

Country Status (4)

Country Link
US (1) US20060230899A1 (en)
EP (1) EP1626845B1 (en)
DE (2) DE10323753B4 (en)
WO (1) WO2004103655A1 (en)

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Publication number Priority date Publication date Assignee Title
TW201200288A (en) * 2010-05-27 2012-01-01 Air Prod & Chem Apparatus and method for providing a temperature-controlled gas
PL230013B1 (en) * 2013-02-06 2018-09-28 Int Tobacco Machinery Poland Spolka Z Ograniczona Odpowiedzialnoscia Method and apparatus for cutting the filtering materials
ITBO20130234A1 (en) 2013-05-21 2014-11-22 Gd Spa SUPPLY DEVICE FOR FILTER ROPES OF AN AUTOMATIC TOBACCO INDUSTRY MACHINE.
DE102017117524A1 (en) * 2017-08-02 2019-02-07 DIENES WERKE FüR MASCHINENTEILE GMBH & CO. KG Knife holder with adjusting slide
CN114851272A (en) * 2022-04-11 2022-08-05 苏州腾达光学科技有限公司 Cutting equipment of OCA soft adhesive tape

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DE3219774A1 (en) * 1982-05-26 1983-12-01 Dr. Otto C. Strecker Kg, 6102 Pfungstadt Dust-extraction device for longitudinal cutters
DE3229368C1 (en) * 1982-08-06 1984-02-09 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Longitudinal-cutting device for paper webs
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DE4425666C2 (en) * 1994-07-20 1997-04-17 Roland Man Druckmasch Device for slitting webs
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DE29714312U1 (en) * 1997-08-11 1998-09-24 Bilstein Spezialfab Wilhelm Knife holder for circular knives with hand protection
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JP2002120193A (en) * 2000-10-11 2002-04-23 Japan Repro-Machine Industries Co Ltd Lamination layer removing method and device
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SG118084A1 (en) * 2001-08-24 2006-01-27 Micron Technology Inc Method and apparatus for cutting semiconductor wafers

Also Published As

Publication number Publication date
DE502004005508D1 (en) 2007-12-27
DE10323753B4 (en) 2007-05-03
DE10323753A1 (en) 2005-01-13
US20060230899A1 (en) 2006-10-19
WO2004103655A1 (en) 2004-12-02
EP1626845A1 (en) 2006-02-22

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