DE102017120026A1 - Cross cutter and method for material- and / or thickness-dependent adaptation of the relative cutting position of a rotating knife to the cutting position of a stationary knife in a cross cutter - Google Patents

Abstract

The invention relates to a cross cutter (1) for cutting, perforating and / or severing a running material web of preferably paper, cardboard, plastic, composite material and / or metal, with a rotation axis (4) extending transversely to the material web and its conveying direction (3) ), wherein the blade shaft (2) has at least one circumferential knife (5) extending in the axial direction, and with a stationary knife carrier (8), the stationary knife carrier (8) extending substantially in the direction of the rotating knife (5) has transverse to the web extending and in a separation zone for cutting with the rotating blade (5) cooperating stationary knife (9). According to the invention, at least one setting means is provided for adjusting at least two different positions of the axis of rotation (4) of the knife shaft (2) in and / or against the conveying direction (3) of the material web and / or perpendicular to the conveying plane of the material web.

Description

The invention relates to a cross cutter for cutting, perforating and / or cross cutting a running web of preferably paper, cardboard, plastic and / or metal, with a about a transverse to the material web and its conveying direction rotating axis rotating cutter shaft as a rotatable cutter, wherein the cutter shaft at least a rotating knife extending in the axial direction of the knife shaft, and having a stationary knife carrier as a fixed cutting device, wherein the stationary knife carrier has a stationary in the direction of the rotating knife transverse to the web extending and cooperating in a separation zone for cutting with the rotating knife stationary knife , In addition, the present invention relates to a method for material- and / or thickness-dependent adaptation of the relative cutting position of at least one mounted on a rotating knife shaft rotating blade to the cutting position of a fixed blade fixed to a stationary knife in a cross cutter.

A cross cutter of the aforementioned type is for example from the DE 20 2008 007 221 U1 known. Such cross-cutters are used for introducing incisions and / or perforations in transported, moving material webs transversely to the conveying or transport direction. With the sheeter, the web can be cut one or more times, with equal and / or different lengths of sheets can be generated from the web. Alternatively, the moving web may be provided with one or more transverse perforations. The material web may be webs of paper, cardboard, plastic or metal foil, fabric or other materials.

The known cross cutter has a fixed cutting device on one side of a flat material web transported through the cross cutter and a rotatable cutting device cooperating with this cutting device on the flat side of such a flat material web lying opposite thereto. Such cross-cutters are also referred to as "convoy cross-cutters" and are distinguished from the so-called "synchro-cross cutters", which have two cooperating rotatable cutting devices, by a much simpler and more cost-effective design, the Konvo cross cutters opens and secures its own market segment ,

The cutting positions of the fixed blade and the rotating blade to each other, that is, the vertical and / or horizontal distance of the blades to each other and / or the angle of the knife edges to each other during the cutting process and / or the immersion depth during the cutting process, have a decisive effect on the quality of cut and the Passing the web during the cutting process. If the position of the knives does not change with respect to one another, this can result in the case of a change of the material web, for example when using material webs of different materials and / or different thickness of the material web, that the cross cutter altogether by a cross cutter with a to the Use case adapted blade position must be replaced. This leads to long downtimes of the entire system, while the cross cutter is replaced.

Cross-cutters are already known from the prior art which, by converting the cross-cutter, allow a change in the cutting positions of the knives relative to one another and an adaptation of the cutting geometry when the material web changes. This can be done for example by replacing the knife or it is the position of the fixed blade on the stationary blade carrier changed by the fixed blade is clamped or clamped in different positions in a knife holder of the knife carrier. An exchange of the entire knife carrier by a knife carrier with other knife assembly and / or by a knife carrier with another position of fixed to the knife carrier stationary knife comes into consideration. All alternatives have the disadvantage that the retooling of the cross cutter is complicated and has to be carried out manually by skilled personnel.

The invention has for its object to provide a cross cutter and a method of the type mentioned above, which allow a little time and laborious change in the relative cutting position of the rotating blade to the cutting position of the fixed blade, in particular for material and / or thickness-dependent adaptation of the cutting positions when changing the material web. By simply and quickly retooling the cross cutter, various cuts or different, required cutting geometries should be achieved. The cutting positions of the knives relative to one another should preferably be able to be adjusted both for coarse and for fine adjustment. In addition, the cross cutter should be characterized by a structurally simple design and a longer service life of the knife. In particular, the object can be seen to provide a structurally simple and inexpensive universal cross cutter available that works on the so-called convoy principle and Similarly, the cutting, perforating and / or cross cutting of different material webs with high quality of the cut or perforation results and unrestricted paper pass allows.

The above objects are achieved by a sheeter with the features of claim 1 and by a method having the features of claim 10. Meaningful continuations, developments and advantageous embodiments of the invention are the subject of each subsequent sub-claims.

The object is achieved in a cross cutter of the type mentioned in the present invention that at least one adjusting means for adjusting at least two different positions of the axis of rotation of the rotatable blade shaft in and / or against the conveying direction of the web and / or transversely to the conveying direction, i. perpendicular to the conveying plane, is provided. Accordingly, according to the method, the rotary axis of the knife shaft is adjusted to change the cutting position of the rotating knife in and / or against the conveying direction of the material web and / or perpendicular to the conveying plane of the material web. The inventive design of the cross cutter makes it possible to adapt the cutting position of the rotating blade by moving, adjusting and / or moving the blade shaft in a structurally simple manner and with little effort and short machine downtime to the cutting position of the stationary blade and thus the cross cutter if necessary, to use for cutting, perforating and / or cross cutting of different material webs with high quality of the cut or perforation result. A high variance in the adjustability of the knife to each other is ensured by the adjustment. Also, material-specific requirements can be met on the geometry of the Schnittkannten. The adjustability of the blade shaft can be achieved in a simple manner knife positions that lead to longer life of the knife.

The cross cutter according to the invention has a knife shaft with at least one rotating knife extending in the axial direction. The rotating blade on the blade shaft may be aligned axially parallel to this or be wound in the circumferential direction of the shaft. Furthermore, the cross cutter has a stationary knife running essentially in the direction of the rotating knife transversely to the material web and cooperating in a separating zone for cutting with the rotating knife.

The position of the axis of rotation of the knife shaft is variable according to the invention and adjustable with the aid of the adjusting means to at least two different positions in the conveying direction of the material web and / or transversely to the conveying direction. It is thus realized a simple way to side and / or height adjustment of the blade shaft. The adjustment can serve for coarse and / or fine adjustment of the position of the knife to each other. The adjustment of the position of the axis of rotation of the knife shaft can be done manually, for example by means of a threaded rod or other adjusting means, or also automated, for example via a controlled pneumatic or hydraulic cylinder.

The stationary knife can be positioned, held or fastened on a stationary knife carrier directly or indirectly via a knife holder fastened to the knife carrier. Accordingly, the rotating blade can also be positioned, held or fastened directly or indirectly to the blade shaft via a blade holder fastened to the blade shaft. An additional fine adjustment of the relative cutting positions of the knife to each other is possible via the adjustment of the knife position in and / or on the knife holder. This is an optimal adaptation of the cutting positions of the knife to the material web used when changing the material web possible.

The different positions of the blade shaft are preferably adjustable in steps. The stepwise setting can be done mechanically, for example, by means of spacers, latching clamping means or lever systems. A gradual adjustment to different positions of the blade shaft has the advantage that in a simple and fast way defined positions that are adapted to the application, can be set. However, it is also possible that the different positions of the blade shaft stepless, for example by means of a spindle, are adjustable. It is known to the person skilled in the art that the stepwise as well as the infinitely variable adjustment of the different positions of the blade shaft can take place via a multiplicity of possible adjusting means.

It is particularly preferred if the horizontal position of the axis of rotation of the knife shaft can be set in preferably equal stages. This can be achieved, for example, with appropriately dimensioned spacers in a structurally simple manner, wherein an adjustment of the axis of rotation of the blade shaft relative to a zero position (without spacer) can be achieved by selecting one or another spacer with different dimensions. This will be further exemplified below.

In this context, the position of the axis of rotation of the knife shaft in the horizontal direction in an interval between zero and 50mm, preferably between zero and 30 mm, can be adjusted. This achieves sufficient variance in the adjustability of the blades relative to one another.

To ensure that even with a change in the position of the axis of rotation of the blade shaft in the horizontal direction, a proper cut is made, is a certain overlap of the blades or overlap of the cutting edges when the rotating knife its deepest stationary knife facing position or the lowest vertical distance achieved on its orbit required. For this purpose, the invention provides that the vertical position of the axis of rotation of the knife shaft for varying the overlapping of the cutting edges in stages is adjustable, in particular in dependence on the horizontal position of the axis of rotation of the knife shaft. Again, a stepless adjustability is not excluded in principle. This makes it possible to achieve a certain coverage of the knife in a simple and accurate manner and at the same time set a particularly low-wear alignment of the knife to each other. In addition, by horizontal and vertical adjustment of the axis of rotation of the blade shaft, the cutting angle between the blades can be changed. This has positive effects on the cut and the passage of the web through the sheeter.

In an advantageous embodiment, the cross cutter has a machine carrier, designed, for example, as a machine table or machine frame, for receiving and / or supporting the stationary knife carrier and a machine structure, for example designed as a machine frame or machine frame upper part, for supporting the knife shaft. In this embodiment, different cutting positions of the rotating blade and the fixed blade are set to each other by at least two different positions of the machine structure relative to the machine frame. The machine construction is preferably set up on the machine carrier and supported on the machine carrier. The machine structure according to the invention in and / or against the conveying direction of the web and / or in the vertical direction relative to the machine carrier adjustable or movable and can be set to at least two different horizontal and / or vertical positions. The setting can, as already described, both stepwise and infinitely. The invention also includes such embodiments in which the blade shaft is mounted in the machine carrier and the machine structure is provided for receiving and / or supporting the stationary blade carrier. The machine structure with the stationary blade carrier can then be adjusted relative to the machine carrier and thus to the blade shaft in order to change the relative cutting position of the rotating blade to the cutting position of the stationary blade.

Advantageously, the position of the machine structure is adjusted relative to the machine carrier by at least one arranged between the machine structure and the machine carrier spacer. The spacers can preferably also fulfill the task of firmly and immovably position the machine structure during operation on the machine frame. By different spacers, which differ in their size, in particular their width and / or height, different positions of the machine structure relative to the machine carrier and thus different cutting positions of the knife can be adjusted to each other. Thus, a first spacer with a lower height between the machine structure and the machine carrier can be arranged to define a first position or set. With the help of a second larger spacer, a second position of the machine structure can be adjusted relative to the machine carrier. The two positions in this example lead to a different vertical distance of the blades in the separation zone. However, spacers of different width or length can also be used for a different positioning of the machine structure relative to the machine carrier and thus the knife relative to each other in the conveying direction of the material web. Different spacers can be provided for adjusting the machine construction relative to the machine carrier in the vertical and in the horizontal direction.

Further advantageous in the inventive cross cutter at least one locking means for (non-destructive) detachable locking a set position of the blade shaft is provided. The locking means may for example consist of one or more screws, for example, clamp a provided for supporting the blade shaft machine structure over at least one spacer against a machine carrier, wherein mounted on the machine support of the stationary blade carrier. Alternatively, a latching mechanism may be used to detect a set position. Other possible locking means for determining a set position of the blade shaft are known in principle to those skilled in the art and can be provided.

In a particularly preferred embodiment, the stationary knife carrier in a block-like structure as such, that is, as an assembly with the fixed blade and possibly a knife holder, in and / or against the The conveying direction of the material web and / or adjustable perpendicular to the conveying plane and / or rotatable or tiltable about a rotational or tilting axis extending transversely to the conveying direction of the material web lying in the conveying plane. By means of this arrangement according to the invention, a larger interval of possible adjustable positions of the knives with respect to one another can be achieved with only one adjustment possibility of the blade shaft with the same installation space. It is thus possible to combine a very compact design of the cross cutter with a wide adjustment possibility of the knife positions to each other. Due to the rotatable or tiltable arrangement of the stationary knife carrier, the angle of the knife can be adjusted to each other in a simple manner in section. The sheeter is thus even better adjustable to the particular application and thus universally applicable, with a variety of cutting geometries are adjustable. An adjustment of the knife carrier in the horizontal and / or vertical direction can be done by using different sized spacers, with each of which a particular arrangement of the knife carrier is predetermined on the machine frame, the knife carrier rests against at least one spacer against the machine frame, supported and / or can be tense.

A rotation or inclination of the stationary knife carrier can be done in a simple manner such that in or against the conveying direction of the material web, a wedge is arranged under the knife carrier. By using different wedges, which differ in their wedge angle, different rotational positions of the stationary blade carrier can be easily adjusted. The rotation or inclination of the stationary knife carrier can also be done in other ways, for example, by the knife carrier is rotatably mounted about an axis.

Further advantageous in the inventive cross cutter at least one locking means for (non-destructive) releasable detection of a set position of the blade carrier is provided.

The stationary knife carrier can be designed in the manner of an exchangeable cassette, which can be removed from the machine carrier in a simple manner. The knife carrier can be arranged, for example, movable on rails transversely to the conveying direction of the material web and can thus easily move out of the separating zone of the knife. By means of a latching device, it can be ensured that the cutter cartridge is arranged fixed in position during the operation of the cross cutter. In the case of a wear-related change of the stationary knife, for example, the knife cassette can be removed and replaced by another knife cassette. In this way, a change of the stationary knife can be done quickly and inexpensively. The possibility of a direct blade change is not excluded and beneficial.

The invention is not limited to the paragraph-wise description of individual embodiments or to the following description of the figures, but also includes any combination of the forms and embodiments and their obvious and / or obvious developments.

• 1 einen erfindungsgemäßen Querschneider mit verstellbarer Messerwelle sowie verstellbarem Messerträger und
• 2 eine Detailansicht der Trennzone des Querschneiders.

In the drawing show

• 1 a cross cutter according to the invention with adjustable blade shaft and adjustable blade carrier and
• 2 a detailed view of the separation zone of the cross cutter.

1 shows a cross cutter 1 with a knife shaft 2 for cutting, perforating and / or cross-cutting a running web of preferably paper, cardboard, plastic and / or metal. The knife shaft 2 has a transverse to the material web and its conveying direction 3 through the sheeter 1 extending axis of rotation 4 on, with the knife shaft 2 at least one circumferential knife extending in the axial direction 5 having. The direction of rotation of the knife shaft 2 is in 1 through the arrow 19 characterized. The rotating knife 5 can be directly on the knife shaft 2 be attached or indirectly via a knife holder not shown in detail on the blade shaft 2 be attached. The rotating knife 5 on the knife shaft 2 can be arranged axially parallel to this or in the circumferential direction of the blade shaft 2 be winding. The knife shaft 2 is in a machine construction 6 arranged and rotatable in the machine structure 6 stored. The machine construction 6 stands on a machine carrier 7 up and is supported on this.

The machine carrier 7 is for receiving and / or storage of a stationary knife carrier 8th educated. The knife carrier 8th has a stationary knife 9 in a separation zone to cut with the rotating knife 5 interacts.

The machine construction 6 lies over spacers 10 . 11 on both sides of the machine frame 7 on. By using different thickness spacers 10 . 11 with the thickness D according to 1 can have different positions of the machine construction 6 to the machine carrier 7 in the vertical direction and thus different heights of the axis of rotation 4 the knife shaft 2 be set. The machine carrier 7 also has two lateral stops 12 . 13 on, against which the foot of the machine structure 6 over another spacer 14 by means of a screw 15 clamped as a locking means and found in its horizontal position. By using different lengths of spacers 14 with the length L according to 1 can have different positions of the machine construction 6 to the machine carrier 7 in the horizontal direction and thus different lateral orientations of the axis of rotation 4 the knife shaft 2 be set. As a result, a stationary positioning of the machine structure 6 ensured during operation of the cross cutter.

In addition to the possibility shown here to use screws as a locking means, any type of locking means are conceivable, such as pins and bolts. With the help of further locking means there is basically the possibility of the machine construction 6 in a certain position with the machine carrier 7 to bolt and thus additionally secure.

With the help of different widths or long spacers 14 can the position of the machine construction 6 relative to the machine carrier 7 changed and thus the position of the machine in the structure 6 mounted knife shaft 2 in the horizontal direction or in the conveying direction 3 the material web are adjusted. By using spacers 10 . 11 . 14 With different size and / or geometry, the cutting positions of the stationary knife can thus be achieved in a structurally simple manner 9 and the rotating knife 5 to each other, that is, the vertical and / or horizontal distance of the knife 5 . 9 to each other and / or the angle of the knife edges to each other during the cutting process and / or the immersion depth during the cutting process, change and adjust when changing the material web to the material and / or the thickness of another material web.

At the in 1 embodiment shown can be different positions of the axis of rotation 4 the knife shaft 2 gradually by using different thickness spacers 10 . 11 and / or different lengths spacers 14 to adjust. However, the adjustment can basically also be made continuously, for example by the spacer 14 is replaced by another set screw. This is then at least a stepless horizontal adjustment of the axis of rotation 4 possible.

2 shows a detailed view of the cross cutter 1 , in particular the separation zone of the material web, in which the rotating knife 5 with the stationary knife 9 interacts with the cut. The stationary knife holder 8th stands on the machine carrier 7 on and is attached to this.

For attachment serve two lateral stops 16 . 17 , against the knife carrier 8th abut side and set this in a particular horizontal position. The stationary knife 9 is via a clamping part 18 on the stationary knife carrier 8th held and fastened. The knife carrier 8th can together with the fixed knife 9 from the sheeter 1 in the manner of a removable cassette transversely to the conveying direction 3 be removed. In 2 this corresponds to a removal of the knife carrier 8th in the direction of the viewer out of the paper plane.

Not shown in detail is that the stationary knife carrier 8th together with the fixed knife 9 and optionally with a knife holder in and / or against the conveying direction 3 the material web and / or perpendicular to the conveying plane adjustable and / or a transverse to the conveying direction 3 the material web in the conveying plane extending rotary or tilting axis is arranged rotatable or tiltable. Different horizontal and / or vertical positions of the knife carrier 8th can be adjusted stepwise or steplessly. A horizontal and / or vertical adjustability of the stationary blade carrier 8th For example, the use of differently sized stops 16 . 17 done and / or on the use of appropriately sized spacers (not shown) or via a spindle. To tilt the knife holder, wedge-shaped spacers can be used or the knife holder is rotated about a rotation axis.

Moreover, at least one likewise not shown locking means, for example a locking screw, may be provided to the blade carrier 8th in a certain horizontal and / or vertical position to lock.

By the possibility of both the position of the axis of rotation 4 the knife shaft 2 as well as the position of the stationary knife carrier 8th To adjust, there is a very compact design of the cross cutter 1 a high variance in the adjustability of the blades 5 . 9 relative to each other. The inventive design of the cross cutter 1 allows, when changing the material web, the cutting positions of the two knives 5 . 9 by displacing, adjusting and / or moving either the blade shaft 2 and / or by moving, adjusting, moving and / or tilting the blade carrier 8th in a structurally simple way and with little effort and short machine downtime to adapt to a required material for a particular web cutting position and thus the cross cutter 1 if necessary, to use for cutting, perforating and / or cross cutting of different material webs with high quality of the cut or perforation result.

LIST OF REFERENCE NUMBERS

1

Sheeter

2

cutterhead

3

conveying direction

4

axis of rotation

5

knife

6

machine design

7

machine support

8th

blade carrier

9

knife

10

spacer

11

spacer

12

attack

13

attack

14

spacer

15

screw

16

attack

17

attack

18

clamping part

19

arrow

D

thickness

L

length

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202008007221 U1 [0002]

Claims (11)

Cross cutter (1) for cutting, perforating and / or cross cutting a moving web of preferably paper, cardboard, plastic, composite and / or metal, with a about a transverse to the web and its conveying direction (3) extending axis of rotation (4) rotatable blade shaft ( 2), wherein the knife shaft (2) has at least one circumferential knife (5) extending in the axial direction, and with a stationary knife carrier (8), wherein the stationary knife carrier (8) transversely substantially in the direction of the rotating knife (5) characterized in that at least one adjusting means for adjusting at least two different positions of the axis of rotation (4) of the knife shaft (2) in and / or opposite to the conveying direction (3) of the material web and / or perpendicular to the conveying plane of the material web is provided. Cross cutter after Claim 1 , characterized in that different positions of the axis of rotation (4) of the knife shaft (2) are adjustable in stages. Cross cutter after Claim 2 , characterized in that the horizontal position of the axis of rotation (4) of the knife shaft (2) is adjustable in preferably equal stages. Cross cutter after Claim 2 or 3 , characterized in that the position of the axis of rotation (4) of the knife shaft (2) in the horizontal direction in an interval between zero and 50mm, preferably between zero and 30 mm, can be adjusted. Cross cutter according to one of the preceding claims, characterized in that the vertical position of the axis of rotation (4) of the knife shaft (2) for varying the overlap of the cutting edges is adjustable in steps, in particular in dependence on the horizontal position of the axis of rotation (4) of the knife shaft ( 2). Cross cutter according to one of the preceding claims, characterized in that a machine carrier (7) for receiving and / or supporting the stationary knife carrier (8) and a machine structure (6) for supporting the blade shaft (2) is provided, wherein for different positions of the axis of rotation (4) of the blade shaft (2) at least two different positions of the machine structure (6) relative to the machine carrier (7) are adjustable. Cross cutter after Claim 6 , characterized in that the position of the machine structure (6) relative to the machine carrier (7) by at least one between the machine structure and the machine carrier (7) arranged spacer (10, 11, 14) is set. Cross cutter according to one of the preceding claims, characterized in that at least one locking means for detecting a set position of the blade shaft (2) is provided. Cross cutter according to one of the preceding claims, characterized in that the stationary knife carrier (8) together with the fixed knife (9) and optionally with a knife holder in and / or against the conveying direction (3) of the material web and / or perpendicular to the conveying plane adjustable and / or about a transverse to the conveying direction (3) of the material web and parallel to the conveying plane extending rotation or tilting axis is arranged rotatable or tiltable. Method for material- and / or thickness-dependent adaptation of the relative cutting position of at least one rotating knife (5) attached to a rotatable knife shaft (2) to the cutting position of a fixed knife (9) fixed to a stationary knife carrier (8) in a cross cutter (1), in particular in a cross cutter (1) according to one of the preceding claims, characterized in that the axis of rotation (4) of the knife shaft (2) for changing the cutting position of the rotating blade (5) in and / or against the conveying direction (3) of the material web and / or is adjusted perpendicular to the conveying plane of the web. Method according to Claim 10 , characterized in that the stationary knife carrier (8) relative to the axis of rotation (4) of the knife shaft (2) in and / or against the conveying direction (3) of the web and / or adjusted perpendicular to the conveying plane and / or a transversely to the conveying direction ( 3) of the material web and parallel to the conveying plane extending rotation or tilting axis is rotated or tilted.

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