EP4159391A1 - Longitudinal cutting system and method for materials in the form of a web - Google Patents

Longitudinal cutting system and method for materials in the form of a web Download PDF

Info

Publication number
EP4159391A1
EP4159391A1 EP22198859.5A EP22198859A EP4159391A1 EP 4159391 A1 EP4159391 A1 EP 4159391A1 EP 22198859 A EP22198859 A EP 22198859A EP 4159391 A1 EP4159391 A1 EP 4159391A1
Authority
EP
European Patent Office
Prior art keywords
knife
cutting system
counter
heating device
longitudinal cutting
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.)
Withdrawn
Application number
EP22198859.5A
Other languages
German (de)
French (fr)
Inventor
Josef Bäumer
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.)
Baeumer Converting Machines GmbH
Original Assignee
Baeumer Converting Machines GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Baeumer Converting Machines GmbH filed Critical Baeumer Converting Machines GmbH
Publication of EP4159391A1 publication Critical patent/EP4159391A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • B26D1/143—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 rotating about a stationary axis
    • B26D1/15—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 rotating about a stationary axis with vertical cutting member
    • B26D1/151—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 rotating about a stationary axis with vertical cutting member for thin material, e.g. for sheets, strips or the like
    • 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
    • B26D1/20—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 a fixed member
    • B26D1/205—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 a fixed member for thin material, e.g. for sheets, strips or the like
    • 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
    • B26D1/22—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 a movable member, e.g. a roller
    • B26D1/225—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 a movable member, e.g. a roller for thin material, e.g. for sheets, strips or the like
    • 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
    • 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
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat
    • B26F3/08—Severing by using heat with heated members
    • B26F3/10—Severing by using heat with heated members with heated rollers or discs

Definitions

  • the invention relates to a slitting system for web-like materials according to the preamble of claim 1.
  • the invention also relates to a method for slitting web-like materials according to the preamble of claim 9.
  • Web-like materials are used in many areas. This can be, for example, foils, papers, fabrics, composites and similar materials. In general, these are thin webs of the respective material whose length is significantly greater than their width. In manufacturing and processing, sheet materials are usually in roll form.
  • Web-like materials usually have to be cut to the appropriate dimensions for different purposes. Due to the longitudinal extent, a division in the longitudinal direction will therefore usually first be necessary, i.e. into several longitudinal strips, the so-called partial panels. If necessary, however, it can also be cut to length, ie cuts in the transverse direction.
  • fixed cutting elements In order to be able to reach higher temperatures, fixed cutting elements are usually used. These can be brought to temperatures of up to 350 degrees Celsius by heating them with thermal conduction. The process speed is limited to a few tens of meters per minute because the material is not crushed with rotating knives, but rather melted.
  • a disadvantage of the known methods is, on the one hand, that with the cutting methods mentioned, sufficiently high temperatures for a hot cut cannot be reached. Also, in principle, high web speeds cannot be achieved with heated stationary cutting elements for hot cutting.
  • the object of the invention to eliminate these disadvantages.
  • the aim is to achieve high process speeds at the same time and to enable hot cutting of the materials.
  • a longitudinal cutting system for sheet materials with the features of claim 1 solves this problem.
  • the slitting system for sheet materials is equipped with at least one knife for slitting the sheet material.
  • it has a heating device for heating the at least one blade.
  • a warm cut and/or hot cut of the web-shaped material is preferably provided.
  • the longitudinal cutting system is characterized in that the heating device is provided for the inductive heating of the at least one blade.
  • an inductive heating device is provided for the at least one knife. In this way, direct heating of the knife can be achieved.
  • only indirect types of heating are provided, in particular based on heat conduction.
  • the heating device preferably has at least one induction loop, in particular at least one conductor loop and/or induction coil.
  • a control device for the heating device is preferably also provided. This serves in particular for temperature measurement and/or temperature regulation, preferably for the at least one knife.
  • a temperature measurement can be carried out, for example, by means of a radiation measuring device, such as in particular an infrared thermometer or the like. The heating output can then be adjusted accordingly or regulated, in particular automatically by the control device.
  • the heating device in particular the induction loop, is preferably arranged in the immediate vicinity of the at least one knife.
  • a compact structure is thus achieved.
  • the inductive heating is used in a targeted manner for the at least one blade. In this way, contactless heating of the at least one blade is preferably provided. In particular, the heating should also take place less in the vicinity of the knife.
  • the electromagnetic field strength usually depends in particular on the distance. The effect of the inductive heating preferably increases with a smaller distance.
  • the temperatures of the at least one blade can be set almost arbitrarily within wide limits.
  • the temperatures vary in particular between room temperature, ie about 20° C., or also the ambient temperature on the one hand up to about 800° C. on the other hand.
  • the heating device enables or allows heating of the at least one knife to temperatures of at least 50°C, preferably at least 70°C. In this way, a so-called hot cut of a web-shaped material can be carried out.
  • the temperatures can also be set higher.
  • the heating device preferably enables or permits heating of the at least one knife to temperatures of more than 70°C, preferably at least 100°C, more preferably at least 300°C. This preferably enables hot cutting of the web-like material.
  • the maximum temperatures are primarily limited by the material of the at least one blade. Material damage can occur from around 800°C, but higher temperatures are also conceivable if the knife is made of a suitable material.
  • the at least one blade is designed in particular as a crush blade and/or circular blade. This enables a clean cutting process using known methods.
  • the at least one knife preferably has a cutting edge, in particular a peripheral one. This is the case in particular with a circular knife, ie a circular knife.
  • At least one counter-pressure element preferably at least one counter-pressure roller, is provided.
  • the counter-pressure element is provided in particular for the at least one knife.
  • the at least one knife is involved the counter-pressure element together.
  • the at least one knife is preferably in contact with the counter-pressure element, in particular with its cutting edge. Between the at least one knife and the counter-pressure element there is merely a small distance in relation to the material thickness or even no distance at all.
  • the knife with the counter-pressure element can thus cut through the web-shaped material, in particular by means of a crush cut. A crush cut can thus be combined with the new technology according to the invention.
  • At least one temperature control device is preferably provided, more preferably a cooling device.
  • the temperature control device preferably serves to control the temperature of the area surrounding the at least one knife and/or the induction loop and/or the counter-pressure element. In this way, unwanted thermal effects on other components can be limited. Heating can also affect neighboring components, for example due to inductive or thermal effects. In particular, an undesired heating up, for example of counter-pressure elements, knife holders and other components of the longitudinal cutting system, can be reduced by the temperature control device.
  • the at least one heating device in particular the induction loop, can preferably be flowed through at least in sections by a temperature control medium and/or has at least one flow channel, with water in particular being provided as the temperature control medium.
  • the counter-pressure element can preferably be flowed through by a temperature control medium at least in sections and/or has at least one flow channel, with water in particular being provided as the temperature control medium. This allows a simple but effective temperature control to be achieved.
  • Other temperature control means are also preferably conceivable, such as in particular thermal oils and/or special refrigerants.
  • the object described at the outset is also achieved by a method for longitudinally cutting web-like materials with the measures of claim 9.
  • a longitudinal cutting system according to the above statements can be used.
  • the material is divided lengthwise with at least one knife.
  • the method is characterized in that the at least one blade is inductively heated.
  • a new type of heating for cutting web-shaped materials is thus used. This allows high temperatures in particular. In addition, rapid and even heating is enabled.
  • Eddy currents are preferably generated in the at least one knife by an electromagnetic field. This is preferably done by means of at least one heating device, more preferably by means of at least one induction loop. A new type of heating can thus be achieved according to the invention.
  • the longitudinal cutting system can preferably be at least partially tempered, in particular cooled. This is done in particular by means of at least one temperature control device, preferably a cooling device. Thermal effects on other components can be reduced in this way, such as on knife holders, knife bars, bearings, counter-pressure elements, etc.
  • the web-like material is preferably divided in the longitudinal direction by means of the at least one blade, in particular a crushing blade and/or circular blade, in cooperation with a counter-pressure element, preferably a counter-pressure roller. This is done in particular by squeezing. A crush cut can thus be combined with the new technology according to the invention.
  • the at least one knife can be heated to a temperature of at least 70°C, preferably at least 100°C, more preferably at least 300°C.
  • a temperature of at least 70°C preferably at least 100°C, more preferably at least 300°C.
  • Material damage can occur from around 800°C, but higher temperatures are also conceivable if the knife is made of a suitable material.
  • the longitudinal cutting system 10 is used to cut a web-like material 11, as in the 2 can be seen.
  • a plurality of knives 12 are provided for cutting up the web-like material 11 .
  • the knives 12 are circular knives, which are accordingly also referred to as circular knives 12 .
  • the knife or knives 12 each have a cutting edge 13 .
  • the cutting edge 13 runs around the entire circumference of the circular blade 12.
  • the circular blade 12 is mounted in a blade holder 15 with an axis of rotation 14 . Accordingly, it is arranged to be rotatable about the central axis 14 .
  • the knife holder 15 is fastened to a knife bar 16 of the longitudinal cutting system 10 .
  • fastening levers 17 are provided on the respective knife holders 15 in the present example. This makes it possible to attach one or more knives 12 to the knife bar 16, in particular to clamp them. At the same time, the distances between the knives 12 and their position relative to the web-like material 11 can be adjusted.
  • other types of attachment can also be provided for the knife holder 15, for example mechanical, motorized or other attachments and locking options, including automatic ones.
  • the at least one blade 12 is designed here as a so-called crush blade. This means that it works against a counter-pressure element, here a counter-pressure cylinder or a counter-pressure roller 18 . For this purpose, no or only a small gap is provided between the knife 12 and the counter-pressure roller 18 .
  • the gap between knife 12 and counter-pressure roller 18 should in particular be smaller than the thickness of the web-like material 11 to be separated.
  • These longitudinal sections 19 and 20 are also referred to as part panels. In the 2 a section 21 is indicated with a dashed line for illustration.
  • a heating device 22 is provided in the exemplary embodiment. This heating device 22 is used for the inductive heating of the knives 12.
  • the heating device 22 has in particular an induction loop 23 on.
  • the induction loop 23 serves to generate an electric field in order to heat the knives 12 .
  • the induction loop 23 is arranged in the immediate vicinity of the knives 12 . In this way, a large proportion of the field in the area of the knives 12 is generated. A high temperature can be reached in particular in the area of the cutting edges 13 of the knives 12 .
  • temperatures of a few 10 K (Kelvin) above ambient temperature up to several hundred Kelvin above ambient temperature can be achieved in this way.
  • temperatures of between 50° C. and 750° C. or even 800° C. are easily possible.
  • the material properties of the knives 12 may also have to be taken into account in order to avoid damage to the knives 12 due to excessively high temperatures.
  • control the heating device 22 typically also has a control unit 24.
  • This control unit 24 contains in particular the electrical components for controlling the heating device 22, such as in particular for supplying a current to the induction loop 23.
  • a power connection 25 can be provided accordingly on a housing 26 of the control device 24.
  • a temperature control device for the induction loop 23 can also be provided.
  • the induction loop 23 can be tubular, for example.
  • a temperature control medium, such as water, can be used for temperature control.
  • the induction loop 23 will be cooled.
  • Corresponding coolant connections 27 can accordingly be provided on the heating device 22 .
  • induction loop holders 28 can be provided, as shown here. Preferably several Induction loop holder 28 installed. These hold the induction loop 23, in particular to prevent relative movement to the knives 12. A change in the distance to the knives 12 typically leads directly to a changed field strength. Consequently, this could also result in a change in the heating output and thus in the temperature of the blade 12 .
  • the heating now takes place in such a way that the induction loop 23 is traversed by an alternating electric current.
  • the resulting alternating field leads to eddy currents, in particular in the at least one knife 12.
  • the eddy currents are converted into heat.
  • the heat input into the knife or knives 12 can thus also be adjusted via the current strength or generally via the strength of the electromagnetic field.
  • Undesirable heating in other components for example due to induction, as well as due to thermal radiation or thermal conduction, can be eliminated in particular by temperature control, ie in particular cooling.
  • the heated knife or knives 12 can now be used in a simple manner for a combined crush cut and hot cut at temperatures of up to a few hundred degrees Celsius.

Landscapes

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

Abstract

Die Erfindung betrifft ein Längsschneidsystem (10) für bahnförmige Materialien, mit wenigstens einem Messer (12) zum Längsteilen des bahnförmigen Materials (11) und mit einer Heizeinrichtung (22) zum Beheizen des wenigstens einen Messers (12), wobei vorzugsweise ein Warmschnitt und/oder Heißschnitt vorgesehen ist. Das Längsschneidsystem (10) zeichnet sich dadurch aus, dass die Heizeinrichtung (22) zur induktiven Beheizung des wenigstens einen Messers (12) vorgesehen ist. Des Weiteren ist auch ein Verfahren zum Längsschneiden von bahnförmigen Materialien beschrieben.The invention relates to a longitudinal cutting system (10) for web-like materials, with at least one knife (12) for slitting the web-like material (11) and with a heating device (22) for heating the at least one knife (12), with a hot cut and/or or hot cutting is provided. The longitudinal cutting system (10) is characterized in that the heating device (22) is provided for inductively heating the at least one blade (12). Furthermore, a method for longitudinally cutting web-like materials is also described.

Description

Die Erfindung betrifft ein Längsschneidsystem für bahnförmige Materialien gemäß dem Oberbegriff des Anspruchs 1. Des Weiteren betrifft die Erfindung ein Verfahren zum Längsschneiden von bahnförmigen Materialien gemäß dem Oberbegriff des Anspruchs 9.The invention relates to a slitting system for web-like materials according to the preamble of claim 1. The invention also relates to a method for slitting web-like materials according to the preamble of claim 9.

Bahnförmige Materialien werden in vielen Bereichen eingesetzt. Es kann sich dabei beispielsweise um Folien, Papiere, Gewebe, Verbunde und ähnliche Materialien handeln. Im Allgemeinen handelt es sich dabei um dünne Bahnen des jeweiligen Materials, deren Längsausdehnung deutlich größer ist als deren Breite. Bei der Herstellung und Bearbeitung liegen bahnförmige Materialien üblicherweise in Rollenformen vor.Web-like materials are used in many areas. This can be, for example, foils, papers, fabrics, composites and similar materials. In general, these are thin webs of the respective material whose length is significantly greater than their width. In manufacturing and processing, sheet materials are usually in roll form.

Für unterschiedliche Einsatzzwecke müssen bahnförmige Materialien in der Regel auf die entsprechenden Abmessungen gebracht werden. Aufgrund der Längsausdehnung wird daher üblicherweise zunächst eine Aufteilung in Längsrichtung erforderlich sein, also in mehrere Längsstreifen, die sogenannten Teilnutzen. Gegebenenfalls kann aber auch ein Ablängen erfolgen, also Schnitte in Querrichtung.Web-like materials usually have to be cut to the appropriate dimensions for different purposes. Due to the longitudinal extent, a division in the longitudinal direction will therefore usually first be necessary, i.e. into several longitudinal strips, the so-called partial panels. If necessary, however, it can also be cut to length, ie cuts in the transverse direction.

Aus dem Stand der Technik ist es bekannt, Längsschnitte bahnförmiger Materialien mit sogenannten Quetschmessern durchzuführen. Hierzu wird das Material zwischen einem Messer und einem Gegendruckelement durchlaufend zerteilt. Hierzu werden häufig Kreismesser und entsprechende Gegendruckwalzen verwendet.It is known from the prior art to make longitudinal cuts in web-like materials using so-called crush knives. For this purpose, the material is continuously divided between a knife and a counter-pressure element. Circular knives and corresponding counter-pressure rollers are often used for this purpose.

Bei schmelzbaren Materialien, wie insbesondere Kunststoffen, aber auch anderen temperaturempfindlichen Materialien, zum Beispiel Geweben, können auch "Warmschnitte" oder sogar "Heißschnitte" durchgeführt werden. Auf diese Weise kann möglicherweise erreicht werden, dass die Randbereiche der Schnitte unmittelbar verschweißt werden.In the case of fusible materials, such as plastics in particular, but also other temperature-sensitive materials, for example fabrics, "warm cuts" or even "hot cuts" can also be carried out. In this way it can possibly be achieved that the edge areas of the cuts are welded directly.

Es wird bisher mit indirekter Beheizung gearbeitet. Daher erfolgt typischerweise Wärmeleitung von einer Wärmequelle zum Messer. Daher sind die Temperaturen üblicherweise auf etwa 50°C bis 70°C begrenzt. Derartige Verfahren werden daher auch als "Warmschnitt" bezeichnet.So far, indirect heating has been used. Therefore, heat conduction typically occurs from a heat source to the knife. Hence the temperatures usually limited to about 50°C to 70°C. Such methods are therefore also referred to as "hot cutting".

Um höhere Temperaturen erreichen zu können, werden üblicherweise feststehende Schneidelemente verwendet. Diese können durch Beheizung per Wärmeleitung auf Temperaturen von bis zu 350 Grad Celsius gebracht werden. Da das Material hierbei nicht durch einen Quetschschnitt mit rotierenden Messern, sondern durch das Zerschmelzen des Materials erfolgt, ist die Prozessgeschwindigkeit auf wenige zehn Meter pro Minute begrenzt.In order to be able to reach higher temperatures, fixed cutting elements are usually used. These can be brought to temperatures of up to 350 degrees Celsius by heating them with thermal conduction. The process speed is limited to a few tens of meters per minute because the material is not crushed with rotating knives, but rather melted.

Nachteilig an den bekannten Verfahren ist daher einerseits, dass bei benannten Schneideverfahren keine ausreichend hohe Temperaturen für einen Heißschnitt erreicht werden können. Auch lassen sich mit beheizten feststehenden Schneidelementen zum Heißschnitt prinzipiell keine hohen Bahngeschwindigkeiten erreichen.A disadvantage of the known methods is, on the one hand, that with the cutting methods mentioned, sufficiently high temperatures for a hot cut cannot be reached. Also, in principle, high web speeds cannot be achieved with heated stationary cutting elements for hot cutting.

Es ist daher die Aufgabe der Erfindung diese Nachteile zu beseitigen. Insbesondere soll erreicht werden, gleichzeitig hohe Prozessgeschwindigkeiten zu erreichen und einen Heißschnitt der Materialien zu ermöglichen.It is therefore the object of the invention to eliminate these disadvantages. In particular, the aim is to achieve high process speeds at the same time and to enable hot cutting of the materials.

Ein Längsschneidsystem für bahnförmige Materialien mit den Merkmalen des Anspruchs 1 löst diese Aufgabe. Das Längsschneidsystem für bahnförmige Materialien ist mit wenigstens einem Messer zum Längsteilen des bahnförmigen Materials ausgestattet. Außerdem weist es eine Heizeinrichtung zum Beheizen des wenigstens einen Messers auf. Vorzugsweise ist ein Warmschnitt und/oder Heißschnitt des bahnförmigen Materials vorgesehen. Das Längsschneidsystem zeichnet sich dadurch aus, dass die Heizeinrichtung zur induktiven Beheizung des wenigstens einen Messers vorgesehen ist. Mit anderen Worten ist eine induktive Heizeinrichtung für das wenigstens eine Messer vorgesehen. Damit kann eine direkte Beheizung des Messers erreicht werden. Im Stand der Technik sind dagegen lediglich indirekte Beheizungsarten insbesondere basierend auf Wärmeleitung vorgesehen.A longitudinal cutting system for sheet materials with the features of claim 1 solves this problem. The slitting system for sheet materials is equipped with at least one knife for slitting the sheet material. In addition, it has a heating device for heating the at least one blade. A warm cut and/or hot cut of the web-shaped material is preferably provided. The longitudinal cutting system is characterized in that the heating device is provided for the inductive heating of the at least one blade. In other words, an inductive heating device is provided for the at least one knife. In this way, direct heating of the knife can be achieved. In the prior art, on the other hand, only indirect types of heating are provided, in particular based on heat conduction.

Vorzugsweise weist die Heizeinrichtung wenigstens eine Induktionsschleife auf, insbesondere wenigstens eine Leiterschleife und/oder Induktionsspule. Es ist vorzugsweise außerdem eine Steuerungseinrichtung für die Heizeinrichtung vorgesehen. Diese dient insbesondere zur Temperaturmessung und/oder Temperaturregelung, vorzugsweise für das wenigstens eine Messer. Dabei kann eine Temperaturmessung beispielsweise mittels eines Strahlungsmessgeräts, wie insbesondere eines Infrarotthemometers oder ähnlichem, vorgenommen werden. Die Heizleistung kann dann passend dazu eingestellt beziehungsweise geregelt werden, insbesondere automatisiert durch die Steuerungseinrichtung.The heating device preferably has at least one induction loop, in particular at least one conductor loop and/or induction coil. A control device for the heating device is preferably also provided. This serves in particular for temperature measurement and/or temperature regulation, preferably for the at least one knife. A temperature measurement can be carried out, for example, by means of a radiation measuring device, such as in particular an infrared thermometer or the like. The heating output can then be adjusted accordingly or regulated, in particular automatically by the control device.

Bevorzugt ist die Heizeinrichtung, insbesondere die Induktionsschleife, in unmittelbarer Nähe des wenigstens einen Messers angeordnet. Damit wird ein kompakter Aufbau erreicht. Des Weiteren wird die induktive Beheizung zielgerichtet für das wenigstens eine Messer eingesetzt. Vorzugsweise ist auf diese Weise eine kontaktlose Beheizung des wenigstens einen Messers vorgesehen. Insbesondere soll die Beheizung auch weniger in der Umgebung des Messer erfolgen. Die elektromagnetische Feldstärke ist üblicherweise insbesondere vom Abstand abhängig. Damit steigt vorzugsweise mit kleinerem Abstand die Wirkung der induktiven Heizung.The heating device, in particular the induction loop, is preferably arranged in the immediate vicinity of the at least one knife. A compact structure is thus achieved. Furthermore, the inductive heating is used in a targeted manner for the at least one blade. In this way, contactless heating of the at least one blade is preferably provided. In particular, the heating should also take place less in the vicinity of the knife. The electromagnetic field strength usually depends in particular on the distance. The effect of the inductive heating preferably increases with a smaller distance.

Die Temperaturen des wenigstens einen Messers lassen sich vorzugsweise erfindungsgemäß grundsätzlich nahezu beliebig in weiten Grenzen einstellen. Die Temperaturen bewegen sich dabei insbesondere zwischen Raumtemperatur, also etwa 20°C, oder auch der Umgebungstemperatur einerseits bis hin zu etwa 800°C andererseits. Insbesondere ermöglicht beziehungsweise erlaubt die Heizeinrichtung ein Beheizen des wenigstens einen Messers auf Temperaturen von wenigstens 50°C, vorzugsweise wenigstens 70°C. Auf diese Weise kann ein sogenannter Warmschnitt eines bahnförmigen Materials vorgenommen werden. Die Temperaturen lassen sich insbesondere auch höher einstellen. Vorzugsweise ermöglicht beziehungsweise erlaubt die Heizeinrichtung ein Beheizen des wenigstens einen Messers auf Temperaturen von mehr als 70°C, vorzugsweise wenigstens 100°C, weiter vorzugsweise wenigstens 300°C. Damit wird vorzugsweise ein Heißschnitt des bahnförmigen Materials ermöglicht. Die maximalen Temperaturen werden dabei vorrangig durch das Material des wenigstens einen Messers beschränkt. Ab etwa 800°C kann es dabei zu Materialbeschädigungen kommen, bei geeigneten Material des Messers sind aber auch höhere Temperaturen denkbar.According to the invention, the temperatures of the at least one blade can be set almost arbitrarily within wide limits. The temperatures vary in particular between room temperature, ie about 20° C., or also the ambient temperature on the one hand up to about 800° C. on the other hand. In particular, the heating device enables or allows heating of the at least one knife to temperatures of at least 50°C, preferably at least 70°C. In this way, a so-called hot cut of a web-shaped material can be carried out. In particular, the temperatures can also be set higher. The heating device preferably enables or permits heating of the at least one knife to temperatures of more than 70°C, preferably at least 100°C, more preferably at least 300°C. This preferably enables hot cutting of the web-like material. The maximum temperatures are primarily limited by the material of the at least one blade. Material damage can occur from around 800°C, but higher temperatures are also conceivable if the knife is made of a suitable material.

Das wenigstens eine Messer ist insbesondere als Quetschmesser und/oder Kreismesser ausgebildet. Damit wird ein sauberer Schnittvorgang mit bekannten Methoden ermöglicht. Das wenigstens eine Messer weist vorzugsweise eine insbesondere umlaufende Schneide auf. Dies ist insbesondere bei einem Rundmesser der Fall, also einem kreisrunden Messer.The at least one blade is designed in particular as a crush blade and/or circular blade. This enables a clean cutting process using known methods. The at least one knife preferably has a cutting edge, in particular a peripheral one. This is the case in particular with a circular knife, ie a circular knife.

Es ist insbesondere wenigstens ein Gegendruckelement, vorzugsweise wenigstens eine Gegendruckwalze, vorgesehen. Das Gegendruckelement ist insbesondere für das wenigstens eine Messer vorgesehen. Insbesondere wirkt das wenigstens eine Messer mit dem Gegendruckelement zusammen. Vorzugsweise steht das wenigstens eine Messer mit dem Gegendruckelement in Kontakt, insbesondere mit seiner Schneide. Zwischen dem wenigstens einen Messer und dem Gegendrucklelement ist lediglich ein im Verhältnis zur Materialdicke kleiner Abstand oder sogar kein Abstand vorgesehen. Damit kann das Messer mit dem Gegendruckelement das bahnförmige Material durchtrennen, insbesondere mittels eines Quetschschnitts. Damit kann ein Quetschschnitt mit der erfindungsgemäßen neuen Technik kombiniert werden.In particular, at least one counter-pressure element, preferably at least one counter-pressure roller, is provided. The counter-pressure element is provided in particular for the at least one knife. In particular, the at least one knife is involved the counter-pressure element together. The at least one knife is preferably in contact with the counter-pressure element, in particular with its cutting edge. Between the at least one knife and the counter-pressure element there is merely a small distance in relation to the material thickness or even no distance at all. The knife with the counter-pressure element can thus cut through the web-shaped material, in particular by means of a crush cut. A crush cut can thus be combined with the new technology according to the invention.

Es ist vorzugsweise wenigstens eine Temperiereinrichtung vorgesehen, weiter vorzugsweise eine Kühleinrichtung. Die Temperiereinrichtung dient vorzugsweise zur Temperierung der Umgebung des wenigstens einen Messers und/oder der Induktionsschleife und/oder des Gegendruckelements. Damit lassen sich unerwünschte thermische Auswirkungen auf andere Bauteile begrenzen. Ein Aufheizen kann beispielsweise durch induktive oder auch thermische Effekte auch Nachbarkomponenten betreffen. Insbesondere kann ein unerwünschtes Aufheizen beispielsweise von Gegendruckelementen, Messerhaltern und anderen Komponenten des Längsschneidsystems durch die Temperiereinrichtung verringert werden.At least one temperature control device is preferably provided, more preferably a cooling device. The temperature control device preferably serves to control the temperature of the area surrounding the at least one knife and/or the induction loop and/or the counter-pressure element. In this way, unwanted thermal effects on other components can be limited. Heating can also affect neighboring components, for example due to inductive or thermal effects. In particular, an undesired heating up, for example of counter-pressure elements, knife holders and other components of the longitudinal cutting system, can be reduced by the temperature control device.

Die wenigstens eine Heizeinrichtung, insbesondere die Induktionsschleife, ist vorzugsweise zumindest abschnittsweise von einem Temperierungsmittel durchströmbar und/oder weist wenigstens einen Durchströmungskanal auf, wobei als Temperierungsmittel insbesondere Wasser vorgesehen ist. Das Gegendruckelement ist vorzugsweise zumindest abschnittsweise von einem Temperierungsmittel durchströmbar und/oder weist wenigstens einen Durchströmungskanal auf, wobei als Temperierungsmittel insbesondere Wasser vorgesehen ist. Damit kann eine einfache, aber effektive Temperierung erreicht werden. Auch andere Temperierungsmittel sind vorzugsweise denkbar, wie insbesondere Thermoöle und/oder spezielle Kältemittel.The at least one heating device, in particular the induction loop, can preferably be flowed through at least in sections by a temperature control medium and/or has at least one flow channel, with water in particular being provided as the temperature control medium. The counter-pressure element can preferably be flowed through by a temperature control medium at least in sections and/or has at least one flow channel, with water in particular being provided as the temperature control medium. This allows a simple but effective temperature control to be achieved. Other temperature control means are also preferably conceivable, such as in particular thermal oils and/or special refrigerants.

Die eingangs geschilderte Aufgabe wird außerdem gelöst durch ein Verfahren zum Längsschneiden von bahnförmigen Materialien mit den Maßnahmen des Anspruchs 9. Insbesondere kann ein Längsschneidsystem nach obigen Ausführungen eingesetzt werden. Das Material wird gemäß dem Verfahren mit wenigstens einem Messer in Längsrichtung geteilt. Das Verfahren zeichnet sich dadurch aus, dass das wenigstens eine Messer induktiv beheizt wird. Damit wird eine neue Art der Beheizung für das Schneiden bahnförmiger Materialien eingesetzt. Diese erlaubt insbesondere hohe Temperaturen. Außerdem wird ein schnelles und gleichmäßiges Aufheizen ermöglicht.The object described at the outset is also achieved by a method for longitudinally cutting web-like materials with the measures of claim 9. In particular, a longitudinal cutting system according to the above statements can be used. According to the method, the material is divided lengthwise with at least one knife. The method is characterized in that the at least one blade is inductively heated. A new type of heating for cutting web-shaped materials is thus used. This allows high temperatures in particular. In addition, rapid and even heating is enabled.

Vorzugsweise werden Wirbelströme in dem wenigstens einen Messer durch ein elektromagnetisches Feld erzeugt. Dies erfolgt vorzugsweise mittels wenigstens einer Heizeinrichtung, weiter vorzugsweise mittels wenigstens einer Induktionsschleife. Damit lässt sich erfindungsgemäß eine neue Art der Beheizung erreichen.Eddy currents are preferably generated in the at least one knife by an electromagnetic field. This is preferably done by means of at least one heating device, more preferably by means of at least one induction loop. A new type of heating can thus be achieved according to the invention.

Das Längsschneidesystem kann vorzugsweise zumindest teilweise temperiert werden, insbesondere gekühlt werden. Dies erfolgt insbesondere mittels wenigstens einer Temperiereinrichtung, vorzugsweise Kühleinrichtung. Thermische Effekte bei anderen Bauteilen lassen sich so reduzieren, wie an Messerhaltern, Messerbalken, Lagern, Gegendruckelementen etc.The longitudinal cutting system can preferably be at least partially tempered, in particular cooled. This is done in particular by means of at least one temperature control device, preferably a cooling device. Thermal effects on other components can be reduced in this way, such as on knife holders, knife bars, bearings, counter-pressure elements, etc.

Das bahnförmige Material wird bevorzugt mittels des wenigstens einen Messers, insbesondere Quetschmessers und/oder Rundmessers, in Zusammenwirkung mit einem Gegendruckelement, vorzugsweise einer Gegendruckwalze, in Längsrichtung zerteilt. Dies erfolgt insbesondere durch Quetschen. Damit kann ein Quetschschnitt mit der erfindungsgemäßen neuen Technik kombiniert werden.The web-like material is preferably divided in the longitudinal direction by means of the at least one blade, in particular a crushing blade and/or circular blade, in cooperation with a counter-pressure element, preferably a counter-pressure roller. This is done in particular by squeezing. A crush cut can thus be combined with the new technology according to the invention.

Vorzugsweise kann das wenigstens eine Messer auf eine Temperatur von wenigstens 70°C, vorzugsweise wenigstens 100°C, weiter vorzugsweise wenigstens 300°C, erhitzt werden. Damit wird insbesondere die Möglichkeit zum Heißschnitt des bahnförmiges Materials gegeben. Ab etwa 800°C kann es dabei zu Materialbeschädigungen kommen, bei geeigneten Material des Messers sind aber auch höhere Temperaturen denkbar.Preferably, the at least one knife can be heated to a temperature of at least 70°C, preferably at least 100°C, more preferably at least 300°C. In this way, in particular, the possibility of hot-cutting the web-like material is given. Material damage can occur from around 800°C, but higher temperatures are also conceivable if the knife is made of a suitable material.

Die vorstehenden und nachfolgenden Ausführungen und Merkmale stellen keine Beschränkung auf die konkreten Kombinationen dar. Vielmehr lassen sie sich im technisch sinnvollen Rahmen auch weiter miteinander kombinieren.The above and following statements and features do not represent a restriction to the specific combinations. Rather, they can also be further combined with one another within the technically reasonable framework.

Ein bevorzugtes Ausführungsbeispiel der Erfindung wird im Folgenden anhand der Zeichnung näher beschrieben. In dieser zeigt:

  • Fig. 1 Eine perspektivische Ansicht eines erfindungsgemäßes Längsschneidsystem, und
  • Fig. 2 eine weitere Ansicht des erfindungsgemäßen Längsschneidsystems gemäß Fig. 1.
A preferred embodiment of the invention is described in more detail below with reference to the drawing. In this shows:
  • 1 A perspective view of a longitudinal cutting system according to the invention, and
  • 2 a further view of the longitudinal cutting system according to the invention 1 .

In der Fig. 1 ist ein Ausschnitt aus einem Längsschneidsystem 10 gezeigt. Das Längsschneidsystem 10 dient zum Zerschneiden eines bahnförmigen Materials 11, wie es in der Fig. 2 zu erkennen ist.In the 1 a detail from a longitudinal cutting system 10 is shown. The longitudinal cutting system 10 is used to cut a web-like material 11, as in the 2 can be seen.

Zum Zerteilen des bahnförmigen Materials 11 sind im gezeigten Ausführungsbespiel mehrere Messer 12 vorgesehen. Bei den Messern 12 handelt es sich hier um kreisförmige Messer, die dementsprechend auch als Kreismesser 12 bezeichnet werden.In the exemplary embodiment shown, a plurality of knives 12 are provided for cutting up the web-like material 11 . The knives 12 are circular knives, which are accordingly also referred to as circular knives 12 .

Das beziehungsweise die Messer 12 weisen jeweils eine Schneide 13 auf. Die Schneide 13 sverläuft um den gesamten Umfang des Kreismessers 12.The knife or knives 12 each have a cutting edge 13 . The cutting edge 13 runs around the entire circumference of the circular blade 12.

Das Kreismesser 12 ist jeweils mit einer Drehachse 14 in einem Messerhalter 15 gelagert. Dementsprechend ist es um die zentrale Achse 14 drehbar angeordnet.The circular blade 12 is mounted in a blade holder 15 with an axis of rotation 14 . Accordingly, it is arranged to be rotatable about the central axis 14 .

Der Messerhalter 15 ist im gezeigten Ausführungsbeispiel an einem Messerbalken 16 des Längsschneidsystems 10 befestigt. Hierzu sind im vorliegenden Beispiel Befestigungshebel 17 an den jeweiligen Messerhaltern 15 vorgesehen. Damit ist es möglich, ein oder mehrere Messer 12 am Messerbalken 16 zu befestigen, insbesondere festzuklemmen. Gleichzeitig können die Abstände der Messer 12 beziehungsweise deren Position relativ zum bahnförmigen Material 11 eingestellt werden. Grundsätzlich können natürlich auch andere Befestigungsarten für die Messerhalter 15 vorgesehen sein, beispielsweise mechanische, motorische oder sonstige Befestigungen und Feststellmöglichkeiten, auch automatische.In the exemplary embodiment shown, the knife holder 15 is fastened to a knife bar 16 of the longitudinal cutting system 10 . For this purpose, fastening levers 17 are provided on the respective knife holders 15 in the present example. This makes it possible to attach one or more knives 12 to the knife bar 16, in particular to clamp them. At the same time, the distances between the knives 12 and their position relative to the web-like material 11 can be adjusted. In principle, of course, other types of attachment can also be provided for the knife holder 15, for example mechanical, motorized or other attachments and locking options, including automatic ones.

Das wenigstens eine Messer 12 ist hier als sogenanntes Quetschmesser ausgebildet. Dies bedeutet, dass es gegen ein Gegendruckelement, hier ein Gegendruckzylinder beziehungsweise eine Gegendruckwalze 18, arbeitet. Zwischen dem Messer 12 und der Gegendruckwalze 18 ist dazu kein oder nur ein kleiner Spalt vorgesehen.The at least one blade 12 is designed here as a so-called crush blade. This means that it works against a counter-pressure element, here a counter-pressure cylinder or a counter-pressure roller 18 . For this purpose, no or only a small gap is provided between the knife 12 and the counter-pressure roller 18 .

Der Spalt zwischen Messer 12 und Gegendruckwalze 18 sollte insbesondere kleiner sein als die Dicke des zu trennenden, bahnförmigen Materials 11. Auf diese Weise wird das durchlaufende Material 11 durch das jeweilige Messer 12 in zwei Längsabschnitte 19 und 20 geteilt. Diese Längsabschnitte 19 und 20 werden auch als Teilnutzen bezeichnet. In der Fig. 2 ist ein Schnitt 21 mit einer gestrichelten Linie zur Veranschaulichung angedeutet.The gap between knife 12 and counter-pressure roller 18 should in particular be smaller than the thickness of the web-like material 11 to be separated. These longitudinal sections 19 and 20 are also referred to as part panels. In the 2 a section 21 is indicated with a dashed line for illustration.

In dem Ausführungsbeispiel ist eine Heizeinrichtung 22 vorgesehen. Diese Heizeinrichtung 22 dient zur induktiven Beheizung der Messer 12. Die Heizeinrichtung 22 weist insbesondere eine Induktionsschleife 23 auf. Die Induktionsschleife 23 dient dazu, ein elektrisches Feld zu erzeugen, um eine Beheizung der Messer 12 zu erreichen.A heating device 22 is provided in the exemplary embodiment. This heating device 22 is used for the inductive heating of the knives 12. The heating device 22 has in particular an induction loop 23 on. The induction loop 23 serves to generate an electric field in order to heat the knives 12 .

Dies wird insbesondere dadurch erreicht, dass ein elektromagnetisches Wechselfeld durch die Induktionsschleife 23 erzeugt wird. Auf diese Weise kann in den Messern 12 jeweils ein elektromagnetisches Wechselfeld erzeugt werden. Dies hat erfindungsgemäß zur Folge, dass in den Messern 12 Wirbelströme angeregt werden. Diese Wirbelströme sorgen dafür, dass sich das Material der Messer 12 aufheizt.This is achieved in particular in that an alternating electromagnetic field is generated by the induction loop 23 . In this way, an alternating electromagnetic field can be generated in each of the knives 12 . According to the invention, this results in eddy currents being excited in the knives 12 . These eddy currents ensure that the material of the knives 12 heats up.

Die Induktionsschleife 23 wird dazu in unmittelbarer Nähe der Messer 12 angeordnet. Auf diese Weise wird ein großer Feldanteil im Bereich der Messer 12 erzeugt. So kann insbesondere im Bereich der Schneiden 13 der Messer 12 eine hohe Temperatur erreicht werden.For this purpose, the induction loop 23 is arranged in the immediate vicinity of the knives 12 . In this way, a large proportion of the field in the area of the knives 12 is generated. A high temperature can be reached in particular in the area of the cutting edges 13 of the knives 12 .

Insbesondere lassen sich auf diese Weise Temperaturen von einigen 10 K (Kelvin) über Umgebungstemperatur bis hin zu mehreren hundert Kelvin über Umgebungstemperatur erreichen. Vorzugsweise sind Temperaturen von zwischen 50°C und 750°C oder auch 800°C ohne weiteres möglich. Bei höheren Temperaturen müssen gegebenenfalls auch die Materialeigenschaften der Messer 12 berücksichtigt werden, um Beschädigungen der Messer 12 aufgrund zu hoher Temperaturen zu vermeiden.In particular, temperatures of a few 10 K (Kelvin) above ambient temperature up to several hundred Kelvin above ambient temperature can be achieved in this way. Preferably, temperatures of between 50° C. and 750° C. or even 800° C. are easily possible. At higher temperatures, the material properties of the knives 12 may also have to be taken into account in order to avoid damage to the knives 12 due to excessively high temperatures.

Zur Steuerung der Heizeinrichtung 22 weist diese typischerweise noch eine Steuerungseinheit 24 auf. Diese Steuerungseinheit 24 beinhaltet insbesondere die elektrischen Komponenten zur Steuerung der Heizeinrichtung 22, wie insbesondere zur Zufuhr eines Stromes in die Induktionsschleife 23. Ein Stromanschluss 25 kann entsprechend an einem Gehäuse 26 der Steuerungseinrichtung 24 vorgesehen sein.To control the heating device 22, it typically also has a control unit 24. This control unit 24 contains in particular the electrical components for controlling the heating device 22, such as in particular for supplying a current to the induction loop 23. A power connection 25 can be provided accordingly on a housing 26 of the control device 24.

Zusätzlich kann auch noch eine Temperierungseinrichtung für die Induktionsschleife 23 vorgesehen sein. Hierzu kann die Induktionsschleife 23 beispielsweise rohrförmig ausgebildet sein. Ein Temperierungsmittel, wie beispielsweise Wasser, kann zur Temperierung verwendet werden. Typischerweise wird es sich um eine Kühlung der Induktionsschleife 23 handeln. Entsprechende Kühlmittelanschlüsse 27 können dementsprechend an der Heizeinrichtung 22 vorgesehen sein.In addition, a temperature control device for the induction loop 23 can also be provided. For this purpose, the induction loop 23 can be tubular, for example. A temperature control medium, such as water, can be used for temperature control. Typically, the induction loop 23 will be cooled. Corresponding coolant connections 27 can accordingly be provided on the heating device 22 .

Um die Induktionsschleife 23 sicher in Position zu halten, können, wie hier gezeigt ist, Induktionsschleifenhalter 28 vorsehen sein. Vorzugsweise sind mehrere Induktionsschleifenhalter 28 eingebaut. Diese halten die Induktionsschleife 23 fest, insbesondere um eine Relativbewegung zu den Messern 12 zu verhindern. Eine Änderung des Abstandes zu den Messern 12 führt typischerweise unmittelbar zu einer geänderten Feldstärke. Daraus könnte folglich auch eine Änderung der Heizleistung und damit der Temperatur des Messers 12 resultieren.In order to hold the induction loop 23 securely in position, induction loop holders 28 can be provided, as shown here. Preferably several Induction loop holder 28 installed. These hold the induction loop 23, in particular to prevent relative movement to the knives 12. A change in the distance to the knives 12 typically leads directly to a changed field strength. Consequently, this could also result in a change in the heating output and thus in the temperature of the blade 12 .

Die Beheizung erfolgt nun so, dass die Induktionsschleife 23 von einem elektrischen Wechselstrom durchflossen wird. Das entstehende Wechselfeld führt zu Wirbelströmen insbesondere in dem wenigstens einen Messer 12. Die Wirbelströme werden in Wärme umgesetzt. Damit kann über die Stromstärke beziehungsweise allgemein über die Stärke des elektromagnetischen Feldes auch der Wärmeeintrag in das oder die Messer 12 eingestellt werden.The heating now takes place in such a way that the induction loop 23 is traversed by an alternating electric current. The resulting alternating field leads to eddy currents, in particular in the at least one knife 12. The eddy currents are converted into heat. The heat input into the knife or knives 12 can thus also be adjusted via the current strength or generally via the strength of the electromagnetic field.

Unerwünschte Erwärmungen in weiteren Komponenten, beispielsweise durch Induktion, sowie auch durch Wärmestrahlung oder Wärmeleitung, lassen sich insbesondere durch Temperieren, also insbesondere Kühlen, beseitigen.Undesirable heating in other components, for example due to induction, as well as due to thermal radiation or thermal conduction, can be eliminated in particular by temperature control, ie in particular cooling.

Das oder die erhitzten Messer 12 lassen sich nun auf einfache Weise zu einem kombinierten Quetschschnitt und Heißschnitt bei Temperaturen von bis zu einigen hundert Grad Celsius nutzen.The heated knife or knives 12 can now be used in a simple manner for a combined crush cut and hot cut at temperatures of up to a few hundred degrees Celsius.

BezugszeichenlisteReference List

1010
Längsschneidsystemlongitudinal cutting system
1111
bahnförmiges Materialsheet material
1212
MesserKnife
1313
Schneidecutting edge
1414
Drehachseaxis of rotation
1515
Messerhalterknife holder
1616
Messerbalkenknife bar
1717
Befestigungshebelfastening lever
1818
Gegendruckwalzebacking roller
1919
Längsabschnittlongitudinal section
2020
Längsabschnittlongitudinal section
2121
Schnittcut
2222
Heizeinrichtungheating device
2323
Induktionsschleifeinduction loop
2424
Steuerungseinrichtungcontrol device
2525
Stromanschlusspower connection
2626
GehäuseHousing
2727
Kühlmittelanschlusscoolant connection
2828
Induktionsschleifenhalterinduction loop holder

Claims (13)

Längsschneidsystem für bahnförmige Materialien, mit wenigstens einem Messer (12) zum Längsteilen des bahnförmigen Materials (11) und mit einer Heizeinrichtung (22) zum Beheizen des wenigstens einen Messers (12), wobei vorzugsweise ein Warmschnitt und/oder Heißschnitt vorgesehen ist, dadurch gekennzeichnet, dass die Heizeinrichtung (22) zur induktiven Beheizung des wenigstens einen Messers (12) vorgesehen ist.Longitudinal cutting system for web-like materials, with at least one knife (12) for slitting the web-like material (11) and with a heating device (22) for heating the at least one knife (12), with a warm cut and/or hot cut preferably being provided, characterized that the heating device (22) is provided for inductively heating the at least one blade (12). Längsschneidsystem nach Anspruch 1, dadurch gekennzeichnet, dass die Heizeinrichtung (22) wenigstens eine Induktionsschleife (23) aufweist, insbesondere wenigstens eine Leiterschleife und/oder Induktionsspule, wobei vorzugsweise eine Steuerungseinrichtung (24) für die Heizeinrichtung (22) vorgesehen ist, insbesondere zur Temperaturmessung und/oder Temperaturregelung, vorzugsweise für das wenigstens eine Messer (12).Longitudinal cutting system according to Claim 1, characterized in that the heating device (22) has at least one induction loop (23), in particular at least one conductor loop and/or induction coil, with a control device (24) preferably being provided for the heating device (22), in particular for temperature measurement and/or temperature control, preferably for the at least one knife (12). Längsschneidsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Heizeinrichtung (22), insbesondere die Induktionsschleife (23), in unmittelbarer Nähe des wenigstens einen Messers (12) angeordnet ist, wobei vorzugsweise eine kontaktlose Beheizung des wenigstens einen Messers (12) vorgesehen ist.Longitudinal cutting system according to Claim 1 or 2, characterized in that the heating device (22), in particular the induction loop (23), is arranged in the immediate vicinity of the at least one knife (12), contactless heating of the at least one knife (12) preferably being provided is. Längsschneidsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Heizeinrichtung (22) ein Beheizen des wenigstens einen Messers (12) auf Temperaturen von wenigstens 50°C, vorzugsweise wenigstens 70°C erlaubt, vorzugsweise für einen Warmschnitt des Materials (11), und/oder dass die Heizeinrichtung (22) ein Beheizen des wenigstens einen Messers (12) auf Temperaturen von wenigstens 70°C, vorzugsweise wenigstens 100°C, weiter vorzugsweise wenigstens 300°C erlaubt, vorzugsweise für einen Heißschnitt des Materials (11).Longitudinal cutting system according to one of the preceding claims, characterized in that the heating device (22) allows the at least one knife (12) to be heated to temperatures of at least 50°C, preferably at least 70°C, preferably for a hot cut of the material (11), and/or that the heating device (22) allows the at least one blade (12) to be heated to temperatures of at least 70°C, preferably at least 100°C, more preferably at least 300°C, preferably for a hot cut of the material (11). Längsschneidsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das wenigstens eine Messer (12) als Quetschmesser und/oder Kreismesser ausgebildet ist, wobei das wenigstens eine Messer (12) vorzugsweise eine insbesondere umlaufende Schneide (13) aufweist.Longitudinal cutting system according to one of the preceding claims, characterized in that the at least one knife (12) is designed as a crush knife and/or circular knife, the at least one knife (12) preferably having a cutting edge (13), in particular a peripheral one. Längsschneidsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens ein Gegendruckelement, vorzugsweise wenigstens eine Gegendruckwalze (18), für das wenigstens eine Messer (12) vorgesehen ist, wobei vorzugsweise das wenigstens eine Messer (12) mit dem Gegendruckelement zusammenwirkt und/oder wobei vorzugsweise das wenigstens eine Messer (12) mit dem Gegendruckelement in Kontakt steht, insbesondere mit seiner Schneide (13).Longitudinal cutting system according to one of the preceding claims, characterized in that at least one counter-pressure element, preferably at least one counter-pressure roller (18), is provided for the at least one blade (12), wherein preferably the at least one blade (12) interacts with the counter-pressure element and/or the at least one blade (12) preferably being in contact with the counter-pressure element, in particular with its cutting edge (13). Längsschneidsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens eine Temperiereinrichtung, vorzugsweise eine Kühleinrichtung, vorgesehen ist, vorzugsweise zur Temperierung der Umgebung des wenigstens einen Messers (12) und/oder der Induktionsschleife (23) und/oder des Gegendruckelements.Longitudinal cutting system according to one of the preceding claims, characterized in that at least one temperature control device, preferably a cooling device, is provided, preferably for temperature control of the area surrounding the at least one knife (12) and/or the induction loop (23) and/or the counter-pressure element. Längsschneidsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die wenigstens eine Heizeinrichtung (22), insbesondere die Induktionsschleife (23), und/oder dass das Gegendruckelement zumindest abschnittsweise von einem Temperierungsmittel durchströmbar ist und/oder wenigstens einen Durchströmungskanal aufweist, wobei als Temperierungsmittel insbesondere Wasser vorgesehen ist.Longitudinal cutting system according to one of the preceding claims, characterized in that the at least one heating device (22), in particular the induction loop (23), and/or that the counter-pressure element can be flowed through at least in sections by a temperature control medium and/or has at least one flow channel, the temperature control medium in particular water is provided. Verfahren zum Längsschneiden von bahnförmigen Materialien, insbesondere mit einem Längsschneidsystem (10) nach einem der vorhergehenden Ansprüche, wobei das Material mit wenigstens einem Messer (12) in Längsrichtung geteilt wird, dadurch gekennzeichnet, dass das wenigstens eine Messer (12) induktiv beheizt wird.Method for longitudinally cutting web-like materials, in particular with a longitudinal cutting system (10) according to one of the preceding claims, the material being divided in the longitudinal direction with at least one knife (12), characterized in that the at least one knife (12) is inductively heated. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass Wirbelströme in dem wenigstens einen Messer (12) durch ein elektromagnetisches Feld erzeugt werden, vorzugsweise mittels wenigstens einer Heizeinrichtung (22), weiter vorzugsweise mittels wenigstens einer Induktionsschleife (23).Method according to Claim 9, characterized in that eddy currents are generated in the at least one knife (12) by an electromagnetic field, preferably by means of at least one heating device (22), more preferably by means of at least one induction loop (23). Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass das Längsschneidesystem (10) zumindest teilweise temperiert wird, insbesondere gekühlt wird, insbesondere mittels wenigstens einer Temperiereinrichtung, vorzugsweise Kühleinrichtung.Method according to Claim 9 or 10, characterized in that the longitudinal cutting system (10) is at least partially temperature-controlled, in particular cooled, in particular by means of at least one temperature-control device, preferably a cooling device. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass das bahnförmige Material (11) mittels des wenigstens einen Messers (12), insbesondere Quetschmessers und/oder Rundmessers, in Zusammenwirkung mit einem Gegendruckelement, vorzugsweise einer Gegendruckwalze (18), in Längsrichtung zerteilt wird, insbesondere gequetscht wird.Method according to one of Claims 9 to 11, characterized in that the web-like material (11) is cut in the longitudinal direction by means of the at least one knife (12), in particular a crushing knife and/or circular knife, in cooperation with a counter-pressure element, preferably a counter-pressure roller (18). is divided, in particular is crushed. Verfahren nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass eine das wenigstens eine Messer (12) auf eine Temperatur von wenigstens 70°C, vorzugsweise wenigstens 100°C, weiter vorzugsweise wenigstens 300°C, erhitzt wird, insbesondere zum Heißschnitt des bahnförmiges Materials (11).Method according to one of Claims 9 to 12, characterized in that one of the at least one knives (12) is heated to a temperature of at least 70°C, preferably at least 100°C, more preferably at least 300°C, in particular for the hot cutting of the sheet material (11).
EP22198859.5A 2021-09-30 2022-09-29 Longitudinal cutting system and method for materials in the form of a web Withdrawn EP4159391A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021125477.9A DE102021125477A1 (en) 2021-09-30 2021-09-30 Slitting system for sheet materials and method for slitting sheet materials

Publications (1)

Publication Number Publication Date
EP4159391A1 true EP4159391A1 (en) 2023-04-05

Family

ID=83508420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22198859.5A Withdrawn EP4159391A1 (en) 2021-09-30 2022-09-29 Longitudinal cutting system and method for materials in the form of a web

Country Status (2)

Country Link
EP (1) EP4159391A1 (en)
DE (1) DE102021125477A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1800395A1 (en) * 1968-10-01 1970-05-14 Brueckner Engineering Gmbh Heatable cutter for synthetic materials
FR2396823A1 (en) * 1977-07-07 1979-02-02 Hanriot Raymond Induction heated rotary knife for cutting synthetic fabrics - for free movement and efficient heat transfer
US4148236A (en) * 1976-12-21 1979-04-10 Norsk Treteknisk Institutt Method and a device for controlling thermal stresses in a power saw blade
DE2923559A1 (en) * 1979-06-11 1981-01-22 Dienes Werke Knife arrangement for roller cutting machine - has electrical heaters assigned to cutting edge to prevent cut laminate adhering to edge
EP0841132A1 (en) * 1996-11-06 1998-05-13 Maysun Co., Ltd. Contact pressure control method and device for rotary cutter
CN207014438U (en) * 2017-06-05 2018-02-16 南京能益节能科技有限公司 A kind of fervent edge equipment of chemical fabric
CN208788693U (en) * 2018-08-30 2019-04-26 泉州市信昌精密机械有限公司 A kind of automatic heating cutter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1800395A1 (en) * 1968-10-01 1970-05-14 Brueckner Engineering Gmbh Heatable cutter for synthetic materials
US4148236A (en) * 1976-12-21 1979-04-10 Norsk Treteknisk Institutt Method and a device for controlling thermal stresses in a power saw blade
FR2396823A1 (en) * 1977-07-07 1979-02-02 Hanriot Raymond Induction heated rotary knife for cutting synthetic fabrics - for free movement and efficient heat transfer
DE2923559A1 (en) * 1979-06-11 1981-01-22 Dienes Werke Knife arrangement for roller cutting machine - has electrical heaters assigned to cutting edge to prevent cut laminate adhering to edge
EP0841132A1 (en) * 1996-11-06 1998-05-13 Maysun Co., Ltd. Contact pressure control method and device for rotary cutter
CN207014438U (en) * 2017-06-05 2018-02-16 南京能益节能科技有限公司 A kind of fervent edge equipment of chemical fabric
CN208788693U (en) * 2018-08-30 2019-04-26 泉州市信昌精密机械有限公司 A kind of automatic heating cutter

Also Published As

Publication number Publication date
DE102021125477A1 (en) 2023-03-30

Similar Documents

Publication Publication Date Title
EP2699404B1 (en) Extrusion device and method for influencing wall thicknesses of an extruded plastic profile
EP2809496B1 (en) Stretching device and method for elongating a film web
WO2008119633A1 (en) Cross-cutting device
EP1798020A2 (en) Splicing device
DE102008019720A1 (en) Heated embossing roll
DE102013002920B4 (en) Bekantungsvorrichtung
WO2019110342A1 (en) Device and method for cooling a cross-cutting shear in hot strip mills
DE19933497A1 (en) Gap adjustment device and method
EP4159391A1 (en) Longitudinal cutting system and method for materials in the form of a web
DE102004030823B4 (en) Device for forming films or sheets of material
DE2213974C2 (en) Device for the mechanical bonding of workpieces by means of a hot melt adhesive
DE10164070B4 (en) Device for separating laminated glass and its use
EP2896704B1 (en) Method and device for setting band saw blades
DE2315919A1 (en) DEVICE FOR GLUING PANELS WITH FOILS
EP3753710B1 (en) Optimized cooling device, device and method for producing tube bodies
DE19549229A1 (en) Material folding and pleating table
DE2228268A1 (en) METHOD AND DEVICE FOR MANUFACTURING BIMETAL STRIPS
EP1162045A2 (en) Temperature controlling means for cylinders
EP1409783B1 (en) Method and device for the mechanical-thermal separation of different materials
DE102007062755B4 (en) hot press
EP1458547B1 (en) Method and device for cooling slab- or web-shaped substrates by means of variable absorbing and reflecting plates
EP2881350A1 (en) Longitudinal slitter blade tracking
EP1651375B1 (en) Method and device for trimming a metal casting
DE2365682C3 (en) Device for high frequency welding of non-magnetic metals such as copper or copper alloys
DE2149538A1 (en) Method for controlling the quality of a seam-welded product

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20231006