EP2851124A1 - Method and apparatus for comminution of web-shaped and/or plate-shaped materials - Google Patents

Abstract

Method for comminution of web-shaped and / or plate-like materials in which the raw material to be comminuted is fed via a feed device to a rotationally driven cutting rotor, which is occupied by knives or cutting plates and forms a cutting gap in the direction of at least one fixed stator knife, wherein the raw material Chips are cut off, and wherein during a single revolution of the cutting rotor, a complete separation of located in a transverse axis of the raw material web Schneidgutschnipseln is generated from the raw material.

Description

The invention relates to a method and a device for comminution of web and / or plate-shaped materials according to the preamble of claim 1.

In particular, the invention relates to the comminution of plastic sheets or plates or composites, wherein the length or width of the web is arbitrary. It can also be very short, flat or even provided with bulges or other elevations web-like structures having a thickness corresponding to a conventional film up to a multiple (100 or 10,000 times) of such a film thickness. act.

With a going back to the same applicant DE 102 22 814 B4 An initially mentioned method has become known in which a rotationally driven cutting rotor is used to operate a knife mill, which serves for comminution of plastic material, which works against a stationary stator knife. Disadvantage of the method and resulting from the process device, however, was that only an insufficient cutting performance was present, because with each of the three arranged on the circumference of the cutting rotor cutting blade only a single cut could be performed.

With a cutting knife arranged on the circumference for this purpose, a further cut was made in the material web to be comminuted. The multiple-running cutting sequences were placed one behind the other, that the material was crushed in the space between the cutting rotor and the stator knife until it fitted as a snippet through a arranged on the material outlet of the cutting rotor sieve.

Elongated splices, which due to their material properties have already passed through the sieve openings from the outset, without being crushed enough, have also been produced in an undesired manner.

Disadvantage of this arrangement was therefore the insufficient cutting performance, because the material to be crushed could be sufficiently crushed only after a large number of revolutions of the cutting rotor, and associated high heating of the cutting elements, which even led to a low-melting plastic melted during the cutting process and deposited undesirably on the blades of the cutting rotor.

Due to the fact that the material was cut several times at the same or a staggered position during one revolution of the cutting rotor, there was a very high energy requirement, an undesirably high heating and also cutting dust, which was released into the environment.

The same criticism applies also to the subject of the DE 1 811 262 A1 , The rotating knife mill shown there, in turn, uses a rotationally driven cutting rotor and a plurality of circumferentially arranged cutting blades which operate against a plurality of fixedly arranged stator knives.

Again, there is the disadvantage that with a single revolution of the cutting rotor takes place a variety of cuts in the material to be cut, and the cut material is cut as long as in the gap between the blades of the cutting rotor and the fixed Statormessern until it is so broken that it passes through the screen openings a sieve disposed on the outer periphery of the cutting rotor passes through.

In the subject of DD 149 780 A1 an arrangement for crushing flat and / or sheet material residues is shown. During the cutting process, the plastics are cut by means of a cutter or knife Cutting tool pressed against an oppositely profiled cutting bar.

The cited document merely discloses a cutting rotor in which the cutting tools are arranged on a same circumferential line without radial offset on the outer circumference. However, there is the disadvantage that the material is only cut at a particular point, which leads to undefined cutting waste.

The invention is therefore based on the prior art, as for example by the DD 149 780 A1 or the DE 102 22 814 B4 has become known, so educate that with significantly lower energy consumption and less heat in their size dimension defined cutting waste can be generated in a single revolution of the cutting rotor.

To solve the problem, the invention is characterized by the technical teaching of claim 1.

An essential feature of the invention is that according to the inventive method, a meandering cut edge is produced in the web-shaped raw material, which means that during a single cutting operation, based on a certain rotation angle, a first meandering cut edge is attached to the front edge of the web-shaped raw material and that in axial distance from the first meandering (zig-zag) cutting edge a second meandering cut edge is applied in the raw material, which is laid to the first cutting edge, that the second cutting edge reaches a complete separation of located in a transverse axis of the raw material web Schneidgutschnipseln.

Thus, in a single revolution of the cutting rotor in its dimensions precisely defined (eg rectangular or square) Schneidgutschnipsel be cut or punched out of the web. It no longer requires several revolutions of the cutting rotor to produce such Schneidgutschnipsel.

Accordingly, it is provided that, starting from the first meander cutting edge, two mutually offset transverse axes are defined, wherein the two transverse axes are arranged offset from one another by a certain longitudinal spacing of the raw material (in the direction of passage). It is important now that in the area of the first transverse axis precisely defined snippets are cut out in a cutting process, these snippets occupy a lateral distance from each other, but lie on the same transverse axis.

On the other transverse axis, which is arranged offset with respect to the length of the web-shaped raw material to the first transverse axis in the direction of passage, a further number of Schnipseln are completely cut out of the web-shaped raw material in the same cutting operation.

This means according to the inventive method that in one and the same cutting process approximately rectangular, square or otherwise shaped snippets are completely cut out of the web on a first transverse axis, and that in the same cutting process by a certain length of the web in the direction of passage again completely bordered snippets are cut out of the material web, which are offset from one another to the Schnipseln the first material web on the first transverse axis by a certain distance in the direction of passage.

This means that in the same cutting process, both on a first transverse axis of the material web complete, in its shape precisely defined snippets are cut out of the material web, punched or cut, and that in the same cutting operation on a second transverse axis of the web, by a certain length is offset in the direction of passage to the first transverse axis, in turn, a number of Schnipseln be completely cut out.

Thus, with the method according to the invention, in each case complete snippets, which are outlined in their shape and completely surrounded by the material, are cut or punched out of the material web on at least two different transverse axes of the web-shaped raw material.

Thereby, there is the advantage that from the web-shaped raw material with a single cutting process a defined waste material is cut out in the form of Schnipseln, and that therefore for the first time requires no sieve through which the cut undefined according to the prior art cut and multiple cut parts, when the crushing process has been completed.

The invention thus dispenses with a screen arranged on the circumference of the cutting rotor, because precisely defined chips are cut out of the sheet-like raw material at at least two transverse axes which are different in the direction of passage.

The chips have a well-defined shape, so that they can be delivered immediately after the cutting process - without passing through a sieve- in a Schneidgutbehälter.

Because it is possible to dispense with a sieve, there is no need for multiple cutting operations of a cutting material that has already been partially separated from the sheet-like raw material, because according to the invention only one cut is made and then defined cuts are produced with defined shape using this unique cut.

The shape of the chips, which are cut out of the sheet-like raw material with a one-time cutting operation, is defined by the type and arrangement of the cutting plates on the cutting rotor, by the feed rate of the raw material to the cutting rotor, and by the rotational speed of the cutting rotor.

In a preferred embodiment, in web-like plastic raw materials, chips are cut out, for example, in the size of 12 mm width and a height of about 3 to 4 mm.

Of course, the invention is not limited to this size. The size specification should only make it clear that snippets of a well-defined size are cut out with a single cutting operation.

The indicated size of the chips is based on that a plastic material web to be comminuted in the form of raw material is formed over its entire surface. However, other raw materials can be cut with the invention, such as plastic lattice sheets, plastic sheets having bulges, bulges or cutouts, and the like. Of course, when the cutting tools of the cutting rotor enter associated recesses of the plastic web to be shredded, the chips are changed in size according to the defect in the raw material.

It is essential, however, that a one-off cutting process takes place in order to enable, for example, the shredding of stamped grids from the thermoforming process (plastic thermoforming). In this special application, a plastic strip, which is, for example, 10 mm to 900 mm wide, fed endlessly in the form of a web of the crushing plant according to the invention. The tape is shredded in a single step on the plastic band in the form of snippets.

The device according to the invention operates without a sieve and without continuous suction. A suction is not required. The material leaves the cutting area merely by accelerating the rotor and due to gravity. Subsequently, the material, which was crushed in the form of Schnipseln be sucked out of the machine by means of a vacuum conveyor.

Another discharge can be done by a blower.

A feature of the invention is thus a special cutting rotor having distributed over the circumference of a plurality of rows of cutting plates, wherein the one row of cutting plates at a radial first distance against the web-like raw material to be crushed, while at least one second bar with cutting plates is present, the radial offset to the first bar offset with cutting plates and cuts on another radius line.

Accordingly, in a preferred embodiment, the invention provides a cutting rotor which has two radially offset cutting edges, each of which is occupied by cutting inserts.

However, the invention is not limited thereto. It can be provided instead of two radially staggered cutting strips and three or more radially staggered cutting strips.

Thus seen in the axial direction of the cutting rotor are the cutting plates of the radially inwardly directed cutting bar on a certain radius line which extends parallel to the transverse axis of the cutting rotor, while the other cutting plates of the other cutting bar sit on a radially outwardly offset second cutting bar.

The cutting plates of the first cutting bar are offset from one another in the axial direction relative to the cutting plates of the second cutting bar.

The inserts are so arranged in the axial direction on gap to each other on different radius lines, so that their coverage is virtually zero. Accordingly, the right edge of the one cutting plate adjoins the left edge of the radially offset cutting plate with a gap spacing of about 0 to 2 mm.

The gap spacing may also be negative, that is, the inserts may overlap each other along the axial line.

It is preferred in this case if a single stator knife is arranged stationary, because it is not necessary according to the functional principle of the invention to provide a plurality of stator knives, as required by the prior art.

The meandering edge of the cutting rotor is achieved by arranging on the circumference of the cutting rotor a multiplicity of guide profiles running on a first radius, between which guide grooves running on a second, shorter radius line are arranged.

The cutting plates of the first transverse axis of the cutting rotor are formed approximately in alignment with the guide profile of the cutting rotor, while the other cutting plates, which are arranged on the second transverse axis, are formed in alignment with the guide groove of the cutting rotor.

Accordingly, the surface of the cutting rotor is also profiled meandering, which is defined by the aforementioned guide profiles and arranged therebetween on the gap guide grooves.

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

All information and features disclosed in the documents, including the abstract, in particular the spatial design shown in the drawings, are claimed to be essential to the invention insofar as they are novel individually or in combination with respect to the prior art.

In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. Here are the drawings and its description further features essential to the invention and advantages of the invention.

• Figur 1: schematisiert ein Schnitt durch eine Vorrichtung nach der Erfindung
• Figur 2: eine vergrößerte Ansicht eines Details aus Figur 1
• Figur 3: die Vorderansicht des Schneidrotors
• Figur 4: ein vergrößertes Detail aus der Vorderansicht nach Figur 3
• Figur 5: die perspektivische Ansicht des Schneidrotors
• Figur 6: die perspektivische Ansicht des Schneidrotors kurz vor dem Eintauchen in die Materialbahn
• Figur 7: die gleiche Darstellung wie Figur 6, bei der die Schneidplatten des Schneidrotors in die Materialbahn eintauchen
• Figur 8: die gleiche Darstellung wie Figur 7, bei der aus der Materialbahn bezüglich verschiedener Querachsen zueinander versetzte Schnipsel ausgestanzt wurden
• Figur 9: schematisiert die Darstellung der Schnittkanten und der Art und Anordnung der Schnipsel, die aus der Materialbahn herausgeschnitten werden
• Figur 10: die in Figur 9 dargestellte Mäanderschnittkante
• Figur 11: ein gegenüber Figur 10 abgewandeltes Ausführungsbeispiel, bei dem nicht zwei auf einer Radiuslinie zueinander versetzte Schneidplatten angeordnet sind, sondern drei

Show it:

• FIG. 1 : Schematically a section through a device according to the invention
• FIG. 2 : an enlarged view of a detail FIG. 1
• FIG. 3 : the front view of the cutting rotor
• FIG. 4 : an enlarged detail from the front view FIG. 3
• FIG. 5 : the perspective view of the cutting rotor
• FIG. 6 : the perspective view of the cutting rotor just before immersion in the material web
• FIG. 7 : the same representation as FIG. 6 , in which the cutting plates of the cutting rotor are immersed in the material web
• FIG. 8 : the same representation as FIG. 7 in which snippets staggered from one another with respect to different transverse axes have been punched out of the material web
• FIG. 9 : schematizes the representation of the cut edges and the type and arrangement of the snippets that are cut out of the material web
• FIG. 10 : in the FIG. 9 illustrated meander cutting edge
• FIG. 11 : one opposite FIG. 10 modified embodiment in which not two on a radius line staggered cutting plates are arranged, but three

In FIG. 1 schematically, a housing 1 is shown, on which a dancer arm 2 is pivotally arranged, via whose dancer roller 5 the raw material 3 to be comminuted is fed in the direction of arrow 4. The material to be crushed is guided around the dancer roller 5 in the form of the material web 3 a and guided over a further deflection point 7 in the housing 1 into the inlet gap 8 between two feed rollers 9, 10 driven in opposite directions.

The material web of the raw material, which enters the inlet gap 8, is designated by 3b.

The invention is not limited to the arrangement of two feed rollers 9, 10 driven in opposite directions to one another, which form the inlet gap 8 between them. In another embodiment, not shown, other feeding devices may be used instead of feed rollers, such as belt conveyors, chain conveyors, air ducts, air bags and the like.

At the outlet of the inlet gap 8, a material guide 11 is arranged, which brings the material in the inlet region of a rotationally driven in the direction of arrow 33 cutting rotor 12.

In the exemplary embodiment shown, the cutting rotor 12 has four clamping strips 23 arranged uniformly distributed on the circumference of the cutting rotor 12, to which associated knife holders 24 are fastened. The knife holder 24 carry associated cutting plates 25, 26 (knife), which are formed in the illustrated embodiment as a turning inserts. This is merely a preferred embodiment of the invention. Instead of using indexable inserts - which have the advantage of multiple use - also single inserts or cutting profiles can be used.

After comminution in the cutting rotor 12, the comminuted material in the form of Schnipseln 31, 32 (see FIG. 9 ) in the direction of arrow 13 in a Schneidgutbehälter 16.

For maintenance purposes, the cutting rotor 12 is laterally covered by a housing cover 18, wherein access is provided by an access door 19.

The cutting rotor 12 is driven by a main drive motor 17 via a belt drive, not shown.

Subsequent to the material guide 11, a stator blade 14 is arranged, on which two cutting plate rows staggered in the radial direction with cutting plates 21, 22 are arranged. This is best done FIG. 6 remove.

The FIG. 2 shows a detail of the illustration in FIG. 1 , There it can be seen that, for example, the feed roller 9 in the radial direction, namely in the direction of arrow 20, can be lifted off the inlet gap 8 in order to set the width of the inlet gap 8 to the thickness of the raw material web.

The cutting rotor 12, the fixed stator blade 14 is rotationally driven in the direction of arrow 33.

The cutting rotor 12 has at least two cutting edge strips arranged on different radius lines. The one cutting inserts of the outer cutting edge strip are designated by 25, while the inner cutting inserts located radially inward on the second cutting edge strip are denoted by 26.

On the inner circumference of the cutting rotor 12 are distributed uniformly on the circumference a number of terminal strips 23 are arranged on which interchangeable and can be fixed, the knife holder 24 for the attachment of the cutting plates 25, 26 are arranged.

Instead of arranging four clamping bars 23 with associated knife holders 24, any other number of clamping bars, knife holders and cutting plates can also be provided. For example, three clamping bars 23 can be provided with knife holders 24 and inserts 25, 26 or even one, two or more than four.

The FIGS. 3 and 4 show the front view of the cutting rotor 12, which forms with its surface a meander profile shape.

Out FIG. 3 It can be seen that the rotor shaft 28 rotatably connected to a pulley 27, which is driven by the main drive motor 17.

Furthermore, it is off FIG. 3 in comparison with FIG. 4 can be seen that arranged on the stator blade 14 cutting plates 21, 22 are arranged radially offset from each other on the gap. The gap spacing is preferably zero. However, it can be negative or positive.

Between the cutting plates 21 of the stator blade 14 placeholders are arranged, which lie exactly on the gap to the cutting plates 22 on the other radius line of the stator blade 14.

Furthermore, in the plan view FIG. 4 recognizable that also arranged on the cutting rotor 12 on different radius lines and with each axial gap (in the direction of the transverse axis) mutually offset cutting plates 25, 26 are arranged.

This is best off FIG. 4 can be seen in the upper and lower part of the drawing.

In FIG. 5 It can be seen that the profile shape of the cutting rotor 12 is approximately meander-shaped, that is, there are a number of parallel and juxtaposed gap guide profiles 29 with a larger diameter, relative to the rotor shaft 28, which is in gap with guide grooves 30th alternate with a smaller radius.

As a result, the meander-shaped profile forms on the outer circumference of the cutting rotor, which is formed by the guide profiles 29 and the guide grooves 30 located therebetween.

FIG. 5 shows, moreover, that the cutting plates 25 in aligned extension of the guide profiles 29 on a same transverse axis 41 (see FIG. 9 ), while radially rearwardly offset the inner cutting plates 26 on a second transverse axis 42 (see FIG. 9 ) are arranged.

Likewise are in FIG. 5 the clamping bar 23 and the knife holder 24 indicated, wherein the parts extend over the entire axial length of the cutting rotor 12.

The FIGS. 6 to 8 show the succession of cuts, which are mounted in the web-like raw material 3 in the same cutting process.

The raw material 3 is fed in the direction of arrow 4 against the outer periphery of the cutting rotor 12, while first the first cutting edge is produced on the chip 31; the cutting plates 25 are about to be immersed in the material web of the raw material. This also applies to the inner cutting plates 26, which are offset behind it on another radius line and produce their cut in the raw material at about the same time.

The cut was in FIG. 6 not yet completed. FIG. 6 only shows the type and arrangement of the web-shaped raw material just before attachment of the cut.

FIG. 7 shows the immersion of the cutting axes 25, 26 arranged on different transverse axes 41, 42. First, the outer cutting plates 25 dip into the material web of the raw material 3, and shortly thereafter, the inner cutting plates 26 dip into the material web. The immersion of the outer cutting plates 25 in relation to the immersion of the inner cutting plates 26 takes place in a succession of one or a few milliseconds. This depends on the peripheral speed of the cutting rotor.

In the general description was spoken in simplified terms of a simultaneous cut. In another embodiment, the geometry of the cutting plates 25 and 26 are chosen so that they immerse exactly at the same time or clearly offset in the surface of the web-shaped raw material 3 and synchronously or staggered perform their cutting lines ,

The FIG. 8 shows the next to be punched snippets 31, 32 in the web, so if the cut to FIG. 7 was completed and a new cut begins.

It is still - in contrast to the above description - added that the invention is not dependent on two or more arranged on the circumference of the cutting rotor 12 terminal strips with knife holders and there arranged cutting plates 25, 26 to use.

It would be quite sufficient in another embodiment of the invention, if only a single terminal block with a single blade holder and each on this blade holder on different transverse axes radially offset cutting plates 25, 26 are arranged. With this simple embodiment, only the cutting performance is impaired. The desired function, that in a single revolution in a certain angular range complete cutting of Schnipseln 31, 32 takes place, is also achieved with this simplified embodiment.

Likewise, it is not necessary for the solution that the outer, located on the first radius line cutting plates 25 and located on the second radius line inner cutting plates 26 are in the same plane. The two cutting plate planes with respect to the outer cutting plates 25 and the inner cutting plates 26 may also be offset from one another. That is, the two cutting edge strips with the cutting plates 25 and 26 would then be arranged offset by an arbitrary circumferential angle in the range of 360 degrees to each other.

The FIG. 9 shows the top view of the front end of a web-shaped raw material 3, which is supplied to the cutting rotor 12 in the direction of arrow 4. In approximately the same cutting process, a meandering cut edge 38 is thus defined, wherein the cut edges 34, 35, 36 are each offset at an angle of 90 degrees to one another.

However, the invention is not limited thereto. The cut edges 34-36 may also differ from one another by a certain angle. An angle of 90 degrees is not necessary for the solution.

It is important that the cutting operations are carried out in the same angular degree of the cutting rotor 12 so that with a single cutting operation both in the inner transverse axis 41, the snippets 31 are punched or cut around in a circle, and in the same operation lying on the second transverse axis 42 further Chips 32 are each also cut out to the full extent, so that they are completely separated from the web-shaped raw material 3 and fall down.

It can be seen that the chips 31 to the Schnipseln 32 - and thus the associated cutting plates 25 and 26 - are arranged in a gap to each other, because the distance 46 on the axial length of the respective cutting plate 25, 26 depends.

There are thus longitudinal lines 43, 44, 45 defined, each cut off with the edges of the chips 31, 32.

It can thus be seen that the chips 31, 32 lie on different transverse axes 41, 42, wherein these transverse axes have a longitudinal spacing 40.

The distance 40 depends on the meandering profile shape of the guide profile 29 of the cutting rotor 12. This distance 40 depends on whether the lying on the outer radius line cutting plates 25 are disposed in front of the arranged on the inner radius line inner cutting plates 26.

Because the chips 31, 32 occupy a mutual distance 40 relative to each other with respect to the circumference of the cutting rotor 12, this results in rectangular material peaks 39, which are alternated by rectangular material recesses 37 in the web-shaped raw material 3.

Accordingly, the serrated or zigzag-shaped meandering edge 38 follows FIG. 10 , The cut edges 34, 35, 36 are thus arranged in a zig-zag or meander shape and consequently also cut a zig-zag-shaped cut line out of the front edge of the raw material 3.

FIG. 11 shows as a modified embodiment, the arrangement of a Statormessers 14 schematically in plan view, where it can be seen that not only two rows of cutting plates 25, 26 may be arranged, but that behind a third row may be arranged, wherein the cutting plate rows each have a mutual distance 40th have from each other, and a third transverse axis 47 is provided, which is arranged downstream of the two other transverse axes 41, 42.

It follows that the invention is not limited to the arrangement of two radially offset, extending over the length of the cutting rotor cutting plates 25, 26, but that more additional cutting plate series can be provided with inserts 26 a.

Instead of the three cutting lines specified here, more than three cutting lines can be used.

drawing Legend

1

casing

2

dancer

3

Raw material 3a, 3b

4

arrow

5

dancer roll

6 7

idler pulley

8th

going nip

9

feed roller

10

feed roller

11

Media guide

12

cutting rotor

13

arrow

14

Stator

15

arrow

16

material to be cut

17

Main drive motor

18

housing cover

19

access door

20

arrow

21

Insert (from 14)

22

Insert (from 14)

23

terminal block

24

knife holder

25

outer insert (from 24/12)

26

inner insert (from 24/12)

27

pulley

28

rotor shaft

29

guide profile

30

guide

31

Snippets (front)

32

Snippets (back)

33

Arrow direction (from 12)

34

cutting edge

35

cutting edge

36

cutting edge

37

material recess

38

Mäanderschnittkante

39

material pips

40

length distance

41

transverse axis

42

transverse axis

43

longitudinal line

44

longitudinal line

45

longitudinal line

46

distance

47

transverse axis

Claims (10)

Method for comminution of web-shaped and / or plate-shaped materials in which the raw material (3, 3a, 3b) to be comminuted is fed via a feed device (5-11) to a rotationally driven cutting rotor (12) which is provided with knives or cutting plates (25, 26) is occupied and forms a cutting gap in the direction of at least one fixed stator blade (14), wherein from the raw material (3, 3, 3b) snippets (31, 32) are cut off, characterized in that during a single revolution of the cutting rotor ( 12) a complete separation of Schneidgutschnipseln located in a transverse axis of the raw material web (31, 32) from the raw material (3, 3a, 3) is generated. A method according to claim 1, characterized in that a first meander-shaped cutting edge (34) at the front edge of the web-shaped raw material (3, 3a, 3b) is mounted and that in the direction of passage of the web at a distance from the first cutting edge (34) has a second meandering cut edge (36) is applied in the raw material, which is laid to the first cutting edge (34) that the second cutting edge (36) produces a complete separation of located in a transverse axis of the raw material web Schneidgutschnipseln (31, 32). A method according to claim 1 or 2, characterized in that along the first transverse axis (41) of the raw material first chips (31) are cut out in a cutting operation, which occupy a lateral distance from each other, and that along the second transverse axis (42), in Passing direction offset from the first transverse axis (41) is arranged, in the same cutting operation, a further number of Schnipseln (32) are completely cut out of the web-shaped raw material. Apparatus for comminution of web and / or plate-shaped materials, in which the raw material (3, 3a, 3b) to be comminuted is fed via a feed device (5-11) to a rotationally driven cutting rotor (12), which is occupied by knives or cutting plates (25, 26) and forms a cutting gap in the direction of at least one fixed stator blade (14), wherein snippets (31, 32) are cut off from the raw material (3, 3, 3b), characterized in that the cutting plates (25, 26) or knives on the cutting rotor (12) are staggered in the axial direction of the cutting rotor (12) such that the cutting plates (25) or knives of a transverse axis (42) lie on a first radius line of the Cut cutting rotor (12), and that cut the cutting plates (26) or blades of the other transverse axis (41) on a deviating radius line. Apparatus according to claim 4, characterized in that the cutting rotor (12) has at least two arranged on different radius lines cutting plate strips with thereon mounted cutting plates (25, 26). Device according to one of claims 4 or 5, characterized in that the cutting rotor (12) has at least one circumferentially arranged knife holder (24) on which at least one clamping strip (23) is fixed, on which the cutting plates (25, 26) interchangeable are held. Device according to one of claims 4 to 6, characterized in that the profile shape of the cutting rotor (12) is approximately meander-shaped, and that a number of parallel and juxtaposed on gap guide profiles (29) having a larger diameter, relative to the rotor shaft ( 28) which alternate in gap with guide grooves (30) of smaller radius. Device according to one of claims 4 to 7, characterized in that arranged on the stator blade (14) cutting plates (21, 22) are arranged radially offset from each other on gap. Device according to one of claims 4 to 8, characterized in that a total of four on the circumference of the cutting rotor (12) evenly distributed clamping strips (23) are provided, where associated blade holder (24) are fixed, and that on each blade holder (24). arranged on two different transverse axes (41, 42) and on different diameter lines intersecting cutting plates (25, 26) or knives are arranged. Material web (3, 3a, b) which was produced by the method according to one of claims 1 to 4 and / or a device according to one of claims 4 to 9, characterized in that at the front end of the web-shaped material web (3, 3a, 3b ) is cut a meandering edge (38) whose cutting edges (34, 35, 36) are each offset at an angle of about 90 degrees to each other and connect to each other.

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