EP2353810A1 - Device for treating a sheet of material - Google Patents

Abstract

The device has rotation axes (B) aligned transverse to a longitudinal direction (L) and parallel to a material web (2) in a concurrent inclined position. An anvil cylinder and a tool cylinder (4) are rotated against each other and rotatably mounted at respective rotation axes. A material web is arranged between the anvil cylinder and the tool cylinder. The anvil cylinder and the tool cylinder are pivoted in the concurrent inclined position. The rotation axes are varied in a concurrent angle (alpha) from a right angle to the longitudinal direction.

Description

The invention relates to a device for processing a material web transported in a longitudinal direction through the device, having a machine frame in which an anvil cylinder and a tool cylinder are mounted, according to the preamble of claim 1.

Devices of the type mentioned are known for example for cutting and perforating material webs in web-fed rotary printing presses. So revealed the DE19927920 Such a device which is provided as a cutting device in the folder of a rotary printing press. The EP1186561 relates to a device for processing, in particular for cutting and perforating a material web, in which a working cylinder cooperates with a fixed counter knife.

When punching, cutting and / or perforating material webs of rotationally cooperating working cylinder occur relatively high forces, which are removed via appropriate tools. These forces increase with decreasing sharpness of the tool. Since the working cylinders are mounted only at their ends, a certain deflection of the working cylinder between the bearing points of the machine frame is unavoidable. Even a comparatively small deflection of the working cylinder can lead to a reduction in the quality of the punching, the cut or the perforation. The deflection and the concomitant reduction in quality is comparatively great, especially for working cylinders with smaller diameters.

The EP 1818299 A1 discloses a device for processing material webs with mutually limited or restrictable anvil or tool cylinders. By such a cabinet of the cooperating working cylinder, it is possible to substantially reduce the forces required for processing, since only one part of the tool cylinder is always engaged with the material web or the anvil cylinder during machining. In this way, a successive immersion of the tools in the material web is achieved. Another advantage of this device is that with a set the deflection, in particular of the tool cylinder can be compensated because the center distance decreases in the middle of the two working cylinders, while it remains unchanged at the ends of the working cylinder. When cabinets thus targeted the center distance in the middle of the two working cylinder influenced.

In this device bearer rings are arranged at both ends of the working surface of the working cylinder over which the working cylinder roll on each other. The bearer rings each have a cylindrical rolling surface, so that the working cylinders run in the mutually limited state very precisely on each other or on the material web guided between them. Alternatively, the bearer rings can be made conical, so that the distance between the working surfaces of the working cylinder is defined defined by an axial displacement of the bearer rings each other. Because the two cylinders are adjusted against each other in the cabinets, the direction of the bearer rings changes to each other. Instead of a parallel line rolling of the bearer rings thus created only a point contact, which has a greater wear of the bearer rings result.

Since the setting of the cylinder provides benefits by means of Schmitzringen, solutions for the above problems was already sought in the past, without having to restrict the working cylinder against each other. In general, however, there are problems with magnetic cylinder inserts, in which the working cylinders are arranged parallel to each other and perpendicular to a direction of movement of the material web. For example, there is an uneven heating of the respective cylinder body and vibrations due to the necessary high pressure between anvil and tool cylinder.

In addition to the limitation of the working cylinder has been trying to solve the problems encountered by cooling or improved storage of the working cylinder or by a spherical shape of the anvil cylinder. However, these solutions are relatively expensive and therefore expensive.

The object of the invention is to provide a simple and inexpensive device for processing material webs, with the good quality but still can be achieved when punching, cutting and / or perforating the webs.

To achieve this object, the present invention pursues the idea of matching the two working cylinders, i. to be inclined to the same extent with respect to the direction of movement of the material web. The working cylinders can therefore also roll on each other as in conventional, i. is arranged perpendicular to the direction of movement working cylinders. By a corresponding design of the punching, cutting or perforating a successive immersion of the tools in the web can be realized.

For this purpose, the generic device has a machine frame, through which the material web is transportable in a longitudinal direction. In the machine frame, an anvil cylinder about a first axis of rotation and a tool cylinder are rotatably mounted about a second axis of rotation. The axes of rotation are each aligned transversely to the longitudinal direction and parallel to the material web. The anvil cylinder and the tool cylinder are rotatable relative to each other, so that the material web between the anvil cylinder and the tool cylinder is feasible.

According to the anvil cylinder and the tool cylinder are pivotable in a coincident inclination. In this inclined position, the axes of rotation of these two working cylinders are again aligned transversely to the longitudinal direction and parallel to the material web. In each case, the working cylinders deviate at a matching angle from a right angle to the longitudinal direction.

The working cylinders are thus aligned parallel to each other in the inclined position. This allows the punching, cutting or perforating during operation of the device on the parallel to the tool cylinder inclined anvil cylinder "unroll". In this case, significantly fewer vibrations than in a solution with mutually limited working cylinders, which is reflected in an improved quality of the material web. The inclination is advantageously about 1-2%, but if necessary, of course, also deviate from it. Advantageously can thus be used to adjust the distance of the working surfaces of tool and anvil cylinder conical bearer rings.

The vibrations occurring during punching, cutting or perforation are advantageously compensated for by the fact that the tools for producing the cutting edges of the corresponding punching, cutting or perforating patterns running perpendicular to the material web do not abruptly come into contact with the anvil cylinder over the entire cylinder length. Rather, contact with the anvil cylinder occurs only at the moment of unrolling the tool, i. his respective engaged section. This is achieved by punching, cutting or perforating with a defined geometric distortion factor according to the inclination of the two cylinders are produced to the web. Due to the parallel inclination of the two cylinders arise when dipping the tools of the punching, cutting or perforating in the web instead of the usual line contact a successively progressing point contact between the web and the punching, cutting or perforating as well as a point contact line contact between the bearer rings. Thus, the forces on the working cylinders can be advantageously reduced and the service life of the tools and the bearer rings can be increased. This while improving the punching, cutting or perforation quality by lower deflection of the working cylinder and reducing the tendency to oscillate.

In conventional parallel arrangement of the two working cylinders, the deflection is enhanced by the line contact of the punching, cutting or perforating across the width of the working cylinder away. The invention avoids such a line contact, without having to make the working cylinder obliquely to each other. In the case of the oblique position of the two working cylinders according to the invention, a local deflection of the material web guided between them is to be expected in relation to their global direction of movement. This is because the material web is frictionally guided in a common contact region of the working cylinder over almost its entire length. As a result of the inclination of the working cylinder whose contact area with respect to the global direction of movement of the web is also tilted.

The expected drifting of the material web by a certain deflection just before the contact area of the working cylinder is taken into account in the design of the punching, cutting or perforating, which are usually to be stretched over the cylinder circumference of the working cylinder. For example, edge guides of the tools are avoided on the punching, cutting or perforating, which favor a guidance of the material web. If, nevertheless, a drifting of the material web is observed, in advantageous embodiments the inclination can be changed during the operation of the device, so that the angle corresponding to both axes of rotation becomes smaller. In the case of major changes of this kind, a renewed adaptation of the punching, cutting or perforation pattern must take place.

Slight and depending on the punching, cutting or perforating more or less strong deflections of the paper web can be accepted or do not lead to significant quality losses in the punching, cutting or perforating.

In a further advantageous embodiment, the anvil cylinder and the tool cylinder are mounted in side plates of the machine frame. In this case, the side plates have recesses and the anvil cylinder and the tool cylinder are arranged in a common, mounted in the recesses of the side plates insert. The latter has an operator-side Schiebeschwenkkulisse and a drive-side pivoting gate. The drive-side recess has a pivot pin engaging in the slot. Due to this arrangement, the working cylinder can advantageously be pivoted together by means of the insert in the inclined position. In such a recording is the adjustment the working cylinder ensured each other without any effort and simplifies the construction of the machine frame.

The anvil cylinder and the tool cylinder of a further embodiment are each provided at their respective ends with a particular conical bearer ring. By axial displacement of the bearer rings to each other is thus advantageously a simple and defined adjustment of the distance between the working surfaces of the working cylinder possible.

In a further advantageous embodiment, a punching mold with a punching pattern is releasably secured on the tool cylinder. The punching pattern compensates for the inclination of the anvil cylinder and the tool cylinder.

The flexibility in the design of the stamping pattern offers cost advantages over alternative stamping concepts that provide no skewing of the two working cylinders involved in the stamping process. Here punching patterns are mentioned here only as an example. The same applies to cutting or perforating tools, which can also be clamped as corresponding shapes on the tool cylinder. In advantageous embodiments of the device consequently the tool cylinder is provided for punching, cutting or perforating.

If rectangular punching fields are to be generated in the material web, an advantageous embodiment of the punching pattern has tools in the form of parallelograms. These are caused by parallel displacement of one of the sides of an image of the rectangular punching fields running transversely to the axis of rotation in the circumferential direction. Such suitable for adaptation to the respective skew punching patterns can be realized inexpensively.

The anvil cylinder and the tool cylinder of another embodiment are each driven by a single drive. In particular, the single drive is designed as a servo drive, which advantageously allows easy adaptation to different inclinations of the working cylinder. Alternatively, the anvil cylinder can drive the tool cylinder.

The device is intended for punching, cutting or perforating an endless paper web. The punching dies described above are generally usable on inclined tool cylinders.

Fig. 1

eine perspektivische Teilansicht einer Vorrichtung zum Bearbeiten einer Materialbahn,

Fig. 2

eine schematische Darstellung der Arbeitszylinder einer konventionellen Vorrichtung,

Fig. 3

eine schematische Darstellung einer erfindungsgemäßen Vorrichtung mit jeweils um den gleichen Betrag geschränkten Arbeitszylindern,

Fig. 4

eine Draufsicht in schematisierter Darstellung auf einen mit einer konventionellen Stanzform bestückten Werkzeugzylinder in konventioneller Ausrichtung mit darunter geführter Materialbahn,

Fig. 5

eine Draufsicht in schematisierter Darstellung auf einen mit einer erfindungsgemäßen Stanzform bestückten Werkzeugzylinder in erfindungsgemäßer Ausrichtung mit darunter geführter Materialbahn,

Fig. 6

eine Draufsicht auf eine konventionelle Stanzform,

Fig. 7

eine Draufsicht auf die Stanzform aus Fig. 6 mit Markierung eines Kontaktbereichs zwischen Amboss- und Werkzeugzylinder,

Fig. 8

eine Draufsicht auf eine erfindungsgemäße Stanzform gemäß einem ersten Ausführungsbeispiel,

Fig. 9

eine Draufsicht auf die Stanzform aus Fig. 8 mit Markierung eines Kontaktbereichs zwischen Amboss- und Werkzeugzylinder,

Fig. 10

eine Draufsicht auf eine weitere konventionelle Stanzform,

Fig. 11

eine Draufsicht auf die Stanzform aus Fig. 10 mit Markierung eines Kontaktbereichs zwischen Amboss- und Werkzeugzylinder,

Fig. 12

eine Draufsicht auf eine erfindungsgemäße Stanzform gemäß einem zweiten Ausführungsbeispiel,

Fig. 13

eine Draufsicht auf die Stanzform aus Fig. 12 mit Markierung eines Kontaktbereichs zwischen Amboss- und Werkzeugzylinder,

Fig. 14

eine Draufsicht auf einen Ausschnitt einer mit der Stanzform aus Fig. 6 oder aus Fig. 8 bearbeiteten Materialbahn, und

Fig. 15

eine Draufsicht auf einen Ausschnitt einer mit der Stanzform aus Fig. 10 oder aus Fig.12 bearbeiteten Materialbahn.

The invention will be explained with reference to an embodiment of the device and with reference to two embodiments of stamping forms with reference to drawings. Show it:

Fig. 1

a perspective partial view of an apparatus for processing a material web,

Fig. 2

a schematic representation of the working cylinder of a conventional device,

Fig. 3

FIG. 2 is a schematic representation of a device according to the invention, each with working cylinders set back by the same amount, FIG.

Fig. 4

a top view in a schematic representation of a equipped with a conventional punching tool cylinder in conventional alignment with guided underneath material web,

Fig. 5

a top view in a schematic representation of a equipped with a punching mold according to the invention tool cylinder in accordance with the invention with guided underneath material web,

Fig. 6

a top view of a conventional stamping die,

Fig. 7

a plan view of the die Fig. 6 Marking a contact area between anvil and tool cylinder,

Fig. 8

a top view of a punching mold according to the invention according to a first embodiment,

Fig. 9

a plan view of the die Fig. 8 Marking a contact area between anvil and tool cylinder,

Fig. 10

a top view of another conventional stamping die,

Fig. 11

a plan view of the die Fig. 10 Marking a contact area between anvil and tool cylinder,

Fig. 12

a top view of a punching mold according to the invention according to a second embodiment,

Fig. 13

a plan view of the die Fig. 12 Marking a contact area between anvil and tool cylinder,

Fig. 14

a plan view of a section of a punched with the shape Fig. 6 or off Fig. 8 machined material web, and

Fig. 15

a plan view of a section of a punched with the shape Fig. 10 or off Figure 12 processed material web.

Fig. 1 shows a perspective partial view of an inventive device 1 for processing a material web 2. The device 1 is for example a punching device with an anvil cylinder 3 and a tool cylinder 4. The recording of these cylinders is done as usual in a equipped with a drive side 5 and an operating side 6 machine frame. 7 the device 1, of which only one side plate 8 is shown on both sides. In the side plates 8 recesses 9 are introduced. The anvil cylinder 3 and the tool cylinder 4 are mounted in a common slot 10, which in turn, is arranged in the recesses 9 of the side plates 8. With the insert 10, these two working cylinders can be introduced together into the device 1 or removed from it. After insertion of the insert 10 in the device 1, this can be regarded as part of the machine frame 7.

The two working cylinders rotate against each other, so that the material web 2 is passed between them. In this case, the anvil cylinder 3 rotates about a first axis of rotation A and the tool cylinder 4 about a second axis of rotation B.

At an in Fig. 2 illustrated, constructed analogously conventional device 1 ', of which only the anvil cylinder 3' and the tool cylinder 4 'are shown, whose axes of rotation A', B 'are parallel to each other, aligned parallel to the material web 2 and perpendicular to a longitudinal direction L of the web 2 wherein the longitudinal direction L corresponds to the global direction of movement of the material web 2.

The Fig. 3 on the other hand shows the device 1 according to the invention accordingly Fig. 1 in a representation analogous to Fig. 2 , Again, the web 2 is in a longitudinal direction L can be transported by the device 1, ie by an opposite rotation of the two working cylinders. The axes of rotation A, B of anvil cylinder 3 and tool cylinder 4 are aligned as the axes of rotation A ', B' of the working cylinder of the conventional device 1 'parallel to the web 2 and transversely to the longitudinal direction L. However, according to the invention, the axes of rotation A, B are not aligned perpendicular to the longitudinal direction L, but they are designed to deviate at an angle α from a right angle to the longitudinal direction L. For clarification is in Fig. 3 a corresponding auxiliary line H _A drawn. The anvil cylinder 3 and the tool cylinder 4 are shown in the inclined position according to the invention.

The two working cylinders are designed to be pivotable in a coincident inclination. In an advantageous embodiment, the working cylinders are pivotable together in the inclined position, in particular by common storage in the insert 10, which is formed pivotable in the inclined position. For this purpose, the insert 10 on the operating side a sliding pivot link 11 and the drive side a pivoting gate 12 and the drive-side recess 9 a engaging in the slot 10 pivot pin 13 with a pivot axis 14. The Fig. 1 shows the drawer 10 and the working cylinder in its inclination.

In the inclined position, the axes of rotation A, B of the working cylinder are parallel to each other and also not perpendicular to the longitudinal direction L. With respect to the longitudinal direction L, which is to be regarded as the global direction of movement of the web 2, the axes of rotation A, B at an angle β is not equal to 90 ° aligned.

Even if, during operation of the device 1, it is locally around a common contact area 15 (FIG. Fig. 9 ) of the two working cylinders should come to deflections of the material web 2, the movement direction L can nevertheless be maintained globally.

With the Fig. 4 to 9 is a first embodiment of a punching plate according to the invention designed as a punching mold 16 of a conventional die 16 'opposite. By means of the cutting die 16 is an inclination of the working cylinder to the angle α compensated. With conventional arrangement of the working cylinder, however, no compensation is required. The use of the punching mold 16 according to the invention and the conventional punching die 16 'result in the same punching result according to FIG Fig. 14 , Of course, in a corresponding device 1 for processing a material web 2 instead of a punching mold 16 and a cutting form or a perforating be arranged and clamped on the tool cylinder 4. Accordingly, instead of being punched with the punching mold 16 described here by way of example, the material web 2 can also be cut with a cutting mold or perforated with a perforating mold.

The Fig. 4 . 6 and 7 refer to the conventional die 16 'for the covering of the conventional tool cylinder 4'. In Fig. 4 is the tool cylinder 4 'covered with the punching mold 16' in a representation from above. Below the anvil cylinder 3 'is arranged, which in the illustration according to Fig. 4 is not recognizable. Between these two working cylinders, the material web 2 is guided in the longitudinal direction L. The working cylinders are aligned in a transverse direction Q perpendicular to the longitudinal direction L. On the material web 2 rectangular, punched into the material web 2 punching fields 17 'can be seen, which may be labels, for example. These punching fields 17 'correspond to a punching pattern 18' on the punching mold 16 ', which is used as a tool 19' in the contact region 15 '(FIG. Fig. 7 ) of the working cylinder dips into the material web 2.

In a comparable representation to Fig. 4 is in Fig. 5 illustrated the inclination of the working cylinder according to the invention. The oblique position of the working cylinder through the angle α to the transverse direction Q formed perpendicular to the longitudinal direction L of the material web 2 is compensated by a corresponding punching pattern 15 of the punching mold 16. In order to produce, for example, usable as labels, rectangular punching fields 17 in the material web 2, tools 19 designed as parallelograms are arranged on the punching mold 16. The shape of the tools 19 is formed by parallel displacement of one of the transverse axis of rotation B extending sides 20 of an image of the rectangular punching fields 17 in the circumferential direction of the tool cylinder 4. In this case, the punching mold 16 itself in the form of a parallelogram and is clamped on the tool cylinder 4. Accordingly, one does not run illustrated abutting edge of the punching mold 16 obliquely to the transverse direction Q. It is alternatively also conceivable to extend the abutting edge parallel to the axis of rotation A, B of the working cylinder. Then, however, depending on the punching pattern 15, it may happen that the punching dies 16 cross beyond the bumping edge. A corresponding embodiment is not shown.

The tool cylinder 4 and the anvil cylinder 3 have on the operator side and on the drive side each a bearer ring 21. Both working cylinders are each operated by means of a servo motor designed as a single drive 22 ( Fig. 1 ). Of course, an unillustrated, conventional drive via a gear train is possible. In this case, at least the anvil cylinder 3 in each case a narrow and / or a crowned gear. As an alternative to the use of servomotors, a direct drive can also be arranged on each axis of rotation A, B, for example by means of torque motors and without gear grading.

In Fig. 6 is one for the conventional tool cylinder 4 'off Fig. 4 provided punching 16 'shown with the punching pattern 15'. On this punching pattern 15 'is in Fig. 7 with a black line, the contact area 15 'shown, in which the material web 2 between the tool cylinder 4' and the anvil cylinder 3 'is passed.

In an analogous way to the 6 and 7 show the 8 and 9 In contrast, the punching mold 16 for clamping on the tool cylinder 4 according to the invention, in. The inclination of the punching mold 16 by the angle α relative to the transverse direction Q is clearly visible, especially in the illustration according to Fig. 9 with the marked by a black line marking the contact area 15 between the tool cylinder 4 and the anvil cylinder 3. Thus, the according to Fig. 5 Under the tool cylinder 4 hidden, gradually progressing point contact to the material web 2 illustrates.

In Fig. 14 is shown for the two arrangements according to the conventional and inventive device 1 ', 1, the punching result on the material web 2. The Fig. 10 to 13 illustrate a second embodiment of a die 26, 26 '. For a conventional device 1' show the 10 and 11 the punching die 26 'with the punching pattern 28' in the form of large rectangles. On the other hand, the show FIGS. 12 and 13 the second embodiment as a punching mold 26 according to the invention with the punching pattern 28 in the form of parallelograms.

According to the FIGS. 7 and 9 is in the FIGS. 11 and 13 the respective contact region 15 ', 15 between anvil and tool cylinder 4', 3 'and 4, 3 marked. Analogous to Fig. 14 is in Fig. 15 the punched material web 2 shown, as it emerges from the punching operation with conventional as well as inventive device 1 ', 1 with a punching die 26', 26.

Of course, with the device 1 with appropriate tool design and punching fields with other shapes, such as elliptical or round punching fields can be produced.

Claims (12)

Device for processing a material web (2) transported in a longitudinal direction (L) by the device (1), comprising a machine frame (7) in which an anvil cylinder (3) revolves around a first axis of rotation (A) and a tool cylinder (4) a second axis of rotation (B) are rotatably mounted, wherein the axes of rotation (A, B) are each aligned transversely to the longitudinal direction (L) and parallel to the material web (2) and wherein the anvil cylinder (3) and the tool cylinder (4) are mutually rotatable and thereby the material web (2) between the anvil cylinder (3) and the tool cylinder (4) is feasible, characterized in that the anvil cylinder (3) and the tool cylinder (4) are pivotable in a coincident inclination, in which their axes of rotation (A , B) are aligned again transversely to the longitudinal direction (L) and parallel to the material web (2) and in each case deviate in a matching angle (α) from a right angle to the longitudinal direction (L) , Apparatus according to claim 1, characterized in that on the tool cylinder (4) a punching, cutting or perforating (16) is releasably secured, which a the oblique position of the anvil cylinder (3) and the tool cylinder (4) compensating punching, cutting - or perforation (15). Apparatus according to claim 2, characterized in that the punching, cutting or perforation pattern (15) for achieving rectangular punching, cutting or perforation fields (17) in the material web (2) has tools (19) in the form of parallelograms, which by parallel displacement of one of the transverse to the axis of rotation (B) extending sides (20) of an image of the rectangular punching, cutting or perforating fields (17) in the circumferential direction of the tool cylinder (4) arise. Device according to one of the preceding claims, characterized in that the anvil cylinder (3) and the tool cylinder (4) in side plates (8) of the machine frame (7) are mounted. Apparatus according to claim 4, characterized in that the side plates (8) have recesses (9) and the anvil cylinder (3) and the tool cylinder (4) in a common, in the recesses (9) of the side plates (8) mounted insert (10 ) are arranged. Device according to Claim 5, characterized in that it has a drive side (5) and an operating side (6), that the insert (10) has an operator-side sliding swivel gate (11) and a drive-side pivoting link (12) and the drive-side recess (9). a in the insert (10) engaging pivot pin (13). Device according to one of the preceding claims, characterized in that the tool cylinder (4) and the anvil cylinder (3) are each provided at their ends with a particular conical bearer ring (21). Device according to one of the preceding claims, characterized in that the anvil cylinder (3) and the tool cylinder (4) in each case via a single drive (22) are drivable. Apparatus according to claim 8, characterized in that the individual drives (22) are designed as servo drives. Device according to one of the preceding claims, characterized in that the tool cylinder (4) is provided for punching, cutting or perforating. Device according to one of the preceding claims, characterized in that it is intended for processing an endless paper web. Cutting die for a tool cylinder (4), with a punching, cutting or perforating pattern (15) according to one of claims 2 or 3.

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