EP1555096B1 - Anvil for cutting web material and method for making transverse cuts in a web material using such an anvil - Google Patents

Description

The present invention relates to a device for cutting sheet-like material according to the preamble of patent claim 1 and to a method for producing cross-sections in a web-like material according to the preamble of claim 12,

In the manufacture of products from z. B. cardboard or corrugated board is assumed in the production process of a web-like material, which is usually provided in the form of rolls. This web-like material is first cut longitudinally in a longitudinal processing for the production of various products by means of a slitter in a plurality of longitudinal webs (utility) of certain width (first web division) and then further processed. A change in the size of the products takes place in the continuous process in that by means of the slitter cuts for longitudinal webs (benefits) of different widths (second web division after format change) are generated. In the transition region between the first and second web splitting, at least one cut is made, which runs in the transverse direction. To produce such a cut, the device according to the invention and the method according to the invention are provided.

The generative EP 0 607 084 A1 as well as the US-A-5 152 205 each show a device for cutting sheet-like material, which has a rotating knife which cuts against a circumferential, consisting of elastic material belt. The belt is made by a vertically movable cylinder with punch on the side opposite the rotating blade in the Active position (cutting position) supported, but not supported in the passive position (non-cutting position).

The cutting against soft material causes high wear of the belt and as a result thereof short life d. H. frequent service intervals. In addition, the cut reliability is not guaranteed.

From the EP-A-0 894 583 B1 a device for cutting web-like material is known in which individual blade pieces are foldable out of a rotating roller and cut these knives in the active position against a roller, which consists of soft material, in particular polyurethane. The soft material of the roller is subject to high wear, which leads to low lifetimes.

The object of the present invention is to develop the generic device and the generic method such that on the one hand the life of the device can be increased, on the other hand, a high cutting safety.

The above object is achieved in the subject matter of claim 1, characterized in that the counter tool is cut to the cutting tool in Aktivpositionin the web-like material, a dull, directly with the web-like material related, from the cutting tool not cutable, flat counter surface for the cutting tool forms and the counter tool substantially horizontally from the active position to a passive position, in which the web-like material is not cut, and vice versa is movable. "Not capable of being cut" means that the counter-tool should not be subject to wear and tear, as is the case in the prior art. The web-like material is therefore using a not cutable counter bearing cut. The fact that the counter bearing is not capable of cutting eliminates the need for frequent replacement. At the same time a high cutting safety is ensured by the device according to the invention.

Conveniently, the counter tool made of hard material such. As hardened steel. Because the counter tool can be moved substantially horizontally from the active position into a passive position (non-cutting position) and vice versa, a reduced space requirement is made possible, on the one hand, and the counter tool can be used in passive position for supporting the web-like material, since the movement of movement of the counter tool parallel to the plane of the web-like material.

Conveniently, the counter tool comprises individual tool segments, which are substantially horizontally individually or in groups of the active in the passive position and vice versa specifically movable. In this way, depending on the selection of the relevant tool segments any part cuts in any length and arrangement can be made in the transverse direction to the web-like material.

Advantageously, a support device for the counter tool is provided, which may be provided, for example, as at least one stationary traverse, along which the individual tool segments are located.

According to a further embodiment of the present invention, the counter tool is damped, in particular sprung. As a result, the knife is somewhat relieved in the active position.

Conveniently, the counter tool is harder than the cutting tool. According to an alternative embodiment, counter tool and cutting tool can also have the same hardness.

In a further expedient embodiment of the present invention, a rotating cutter bar or a pendulum cutter bar is provided as a cutting tool.

To produce cross-sections of discrete size and arrangement, the cutting tool in an alternative embodiment has individual cutting tool segments, which can be brought from an active position into a passive position and vice versa. The counter bearing is not segmented in this case.

• Positionieren eines Schneidwerkzeugs auf einer ersten Seite des Längsweges des bahnartigen Materials,
• Positionieren eines Gegenwerkzeugs auf einer zweiten Seite des Längsweges des bahnartigen Materials,
• Auswählen wenigstens eines Abschnitts des bahnartigen Materials,
• Querschneiden des bahnartigen Materials im Bereich des wenigstens einen ausgewählten Abschnittes und
• zum Schneiden das Schneidwerkzeug mit einer stumpfen, vom Schneidwerkzeug nicht schnittfähigen Gegenfläche des Gegenwerkzeugs in direkten Kontakt tritt, wobei

das Gegenwerkzeug im Wesentlichen horizontal von der Aktivposition in eine Passivposition und umgekehrt verfahrbar ist Aufgrund der horizontalen Verfahrbarkeit ist es möglich, dass das bahnartige Material auch in Passivposition des Gegenwerkzeugs bzw. des jeweiligen Gegenwerkzeugsegments eine Auflage für das bahnartige Material begründet.To solve the problem according to the patent, the following method steps are proposed in the method according to the invention:

• Positioning a cutting tool on a first side of the longitudinal path of the web-like material,
• Positioning a counter tool on a second side of the longitudinal path of the web-like material,
• Selecting at least a portion of the web-like material,
• Cross cutting of the web-like material in the region of the at least one selected section and
• for cutting, the cutting tool comes into direct contact with a blunt, non-cutting edge of the cutting tool counter surface of the counter tool, wherein

Because of the horizontal movability, it is possible for the web-like material to justify a support for the web-like material even in the passive position of the counter-tool or the respective counter-tool segment.

In this case, the transverse cutting over the entire width of the web-like material or only over a part thereof, d. H. without interruption of the web-like material.

To produce cross-sections of defined length and position, the counter-tool expediently comprises a plurality of counter-tool segments, which can be moved individually or in groups essentially horizontally from an active to a passive position and vice versa.

Identical, recurring features are for the sake of clarity only once marked with a reference numeral.

Fig. 1

einen Formatbreitenwechsel zwischen einer ersten Bahnaufteilung und einer zweiten Bahnaufteilung während der Bearbeitung von bahnartigem Material in einem kontinuierlichen Arbeitsprozess;

Fig. 2

eine Ausführungsform der erfindungsgemäßen Vorrichtung zum Schneiden unter Verwendung einzelner Schneidwerkzeugsegmente in perspektivischer Darstellung;

Fig. 3

eine etwas vergrößerte Ausschnittsdarstellung aus Fig. 2 zur Verdeutlichung der unterschiedlichen Stellungen der Schneidwerkzeugsegmente;

Fig. 4

eine Darstellung der Anordnung der Schneidwerkzeugsegmente gemäß der Ausführungsform nach Fig. 3 aus rückwärtiger, perspektivischer Sicht sowie

Fig. 5

eine Schnittdarstellung der erfindungsgemäßen Vorrichtung zum Schneiden von bahnartigem Material gemäß der vorstehenden Ausführungsform.

Advantageous embodiments of the present invention are explained in more detail below with reference to drawing figures. Show it:

Fig. 1

a format width change between a first web split and a second web split during the processing of web-like material in a continuous work process;

Fig. 2

an embodiment of the inventive device for cutting using individual cutting tool segments in perspective view;

Fig. 3

a slightly enlarged detail view Fig. 2 to illustrate the different positions of the cutting tool segments;

Fig. 4

an illustration of the arrangement of the cutting tool segments according to the embodiment according to Fig. 3 from the rear, perspective view as well

Fig. 5

a sectional view of the device according to the invention for cutting sheet-like material according to the above embodiment.

Reference numeral 1 in Fig. 1 denotes a web-like material, such. B. corrugated board, which is processed in a continuous process. For the simultaneous production of products of different sizes (eg folding cartons made of corrugated cardboard), the web-like material 1 is divided by longitudinal cuts 4 into a plurality of webs ("benefits"). The in Fig. 1 right section represents a first format width area with multiple benefits 2. This first format width area is represented by a (in Fig. 1 not shown) cut knife assembly.

When changing the format widths on products of a different size takes place on the knife assembly a format width change from the first web splitting to a second web splitting with benefits 3, which is characterized by the cutting lines 5. This format width change also takes place in the continuous production process.

In order to ensure a trouble-free transition of the first format-width region to the second format-width region, cross-sections 6 are provided in the transition region. The cross section 6 in Fig. 1 connects a longitudinal section 4 of the first format width range with a longitudinal section 5 of the second format width range. Two further cross-sections positioned in the edge area are in the range of the offset of the respective edge-side section (trim).

Fig. 2 shows a useful embodiment of the device 7 according to the invention for generating the cross section 6 in Fig. 1 ,

The device 7 comprises a frame 15 within which the (in Fig. 2 not shown) web-like material 1 in the transport direction A is moved continuously. For cutting the web-like material 1, a cutting tool 8 in the form of a with a knife 9 (see. Fig. 5 ), provided rotating cylinder. The knife 9 extends in this embodiment over the entire width of the web-like material. 1

The device 7 comprises a counter tool 10, which in the embodiment according to Fig. 2 a plurality of individual cutting tool segments 11, which in the horizontal direction individually or in groups from an active position to a passive position and vice versa by suitable (not shown in the figure) driving means are movable.

The individual counter-tool segments 11 are supported along a transverse traverse 14, which is connected to the frame 15. The in Fig. 2 invisible, provided with a knife 9 cylinder is driven by a laterally provided on the frame 15 drive 16.

From the enlarged view Fig. 3 the respective position of the counter-tool segments 11 within the device 7 according to the invention becomes clear. Thus, those counter-tool segments 11, which lie further downstream in the transport direction A, are in the active position, ie cutting position, whereas the others are in the passive position.

The counter-tool segments 11 are moved by means of respective drive elements in the form of cylinders 17, which enable two positions, namely an extended and a retracted position. They are individually over (in Fig. 3 not shown) control devices directly controlled.

From the illustration according to Fig. 4 the rear view of the device 7 according to the invention can be seen. The advanced in the transport direction A Gegenwerkzeugsegmente 11 are those that are in the active position.

FIG. 5 shows the device according to the invention of the embodiment described above in section.

Immediately adjacent to the cutting tool 8 is the counter tool 10. In the gap formed between the cutting tool 8 and counter tool 10, the web-like material runs 1. The counter tool 10 also extends over the entire width of the web-like material. 1

Under gap is to be understood that an approximation between the knife 9 of the cutting tool 8 and the counter tool 10 can be realized by a Messerereinstellvorrichtung on the side of the cutting tool 8 and / or by a height adjustment device of the counter tool 10.

If not cut, there is a gap between the knife 9 and the counter tool 10. During the cut, knife 9 and counter tool 10 are in direct contact. Appropriately, in this case a contact pressure is provided, for example, at least 5000 N, preferably 7000 - 13000 N, preferably 9000 - 11000 N.

The counter-tool 10 is supported by a support device 13 which has a traverse 14 on its upper and lower sides. The traverse 14 has expediently a (in Fig. 5 not shown) height adjustment, with which the gap between the cutting tool 8 and counter tool 10 can be changed.

At the top of the support device 13, a slightly raised counter surface 12 is provided for the knife 9 of the cutting tool 8. The counter tool 10 or the counter surface 12 thereof is not capable of being cut by the knife 9 of the cutting tool 8. With regard to the material hardness, the counter-tool 10 expediently fulfills approximately the following condition: hardness _counter- tool ≥ hardness of _knife . For example, the counter tool 10 may be made of hardened steel.

The respective knife 9 of the cutting tool 8 is expediently by means of a (in Fig. 5 not shown) lubrication z. B. lubricated with oil. Also or in addition to this, an adjusting device for the respective blade 9 of the cutting tool 8 may be provided so that the blades can be readjusted several times before they are replaced.

In order to bring the device for cutting from an active position (cutting position) to a passive position (non-cutting position) and vice versa, the counter-tool 10 (in the present embodiment, each counter-tool segment 11 as part of the counter-tool 10) in horizontal Direction or approximately parallel to the plane of the web-like material 1 movable. For this purpose, the counter-tool 10 is movable on a carriage (not shown) by means of an associated cylinder 17, which can be moved pneumatically via an actuating cylinder (likewise not shown). In this way, the counter surface 12 of the counter tool 10 can be brought into the active or passive position, depending on whether a section of the web-like material 1 is desired or not.

According to the invention, the cut is ensured by direct abutment of the knife 9 on the mating surface 12 of the counter-tool 10 made of hard material.

In the in the Fig. 2-4 illustrated embodiment of the device according to the invention, the counter-tool 10 is divided into a plurality of counter-tool segments 11, which are each driven individually and / or in groups and can be moved as needed in the respective active or passive position. As a result, any desired cutting positions and / or cutting lengths across the width of the web-like material 1 can be realized.

The horizontal, d. H. Parallel movement to the plane of the web-like material 1, displacement of the counter tool 10 and the Gegenwerkzeugsegmente 11 ensures the advantage that the counter tool 10 and the Gegenwerkzeugsegmente 11 serves or serve as a support for the web-like material 1 in passive position. Incidentally, this construction requires only a small depth.

According to a further, not shown in the figures embodiment, instead of the segmentation of the counter tool 10 also has a segmentation of Cutting tool 8, for example, be provided by individual, individually controllable knife.

With the present invention, a substantial extension of the service life of the generic device for cutting web-like material is achieved. In addition, an increased cutting safety is ensured. Finally, the device according to the invention requires a comparatively small space requirement for the construction. All in all, the invention consequently represents a very special enrichment of the relevant state of the art.

LIST OF REFERENCE NUMBERS

1

web-like material

2

Benefits in the first format width range

3

Benefits in the second format width range

4

Longitudinal section (first format width range)

5

Longitudinal section (second format width range)

6

cross-section

7

Device for cutting

8th

cutting tool

9

knife

10

counter-tool

11

Counter-tool segments

12

counter surface

13

support device

14

traverse

15

frame

16

drive

17

cylinder

Claims (15)

1. Device for cutting web-like material (1) which is continuously guided through the device along a feed path, having
   a single- or multi-piece cutting tool (8) which is provided over the width of the feed path, a counter-tool (10) relative to the cutting tool (8), the web-like material (1) running between the cutting tool (8) and the counter-tool (10) with the upper and lower side thereof,
   characterised in that
   the counter-tool (10) relative to the cutting tool (8) in the active position, in which the web-like material (1) is cut, forms, for the cutting tool (8), a blunt planar counter-face (12) which is directly connected to the web-like material (1) and which cannot be cut by the cutting tool (8), and the counter-tool (10) can be moved in a substantially horizontal manner from the active position into a passive position in which the web-like material (1) is not cut and vice-versa.
2. Device according to claim 1,
   characterised in that
   the counter-tool (10) comprises hard material.
3. Device according to either of the preceding claims,
   characterised in that
   the counter tool (10) has individual tool segments (11) which can be moved in a substantially horizontal manner individually and/or in groups from the active position into the passive position and vice-versa during operation.
4. Device according to any one of the preceding claims,
   characterised in that
   a support device (13) is provided for the counter-tool (10).
5. Device according to claim 4,
   characterised in that
   a cross-member (14) which is in particular fixed in position is provided as a support device (13).
6. Device according to any one of the preceding claims,
   characterised in that
   the counter-tool (10) is damped, in particular cushioned.
7. Device according to any one of the preceding claims,
   characterised in that
   the counter-tool (10) is harder than the cutting tool (8).
8. Device according to any one of claims 1 to 6,
   characterised in that
   the counter-tool (10) and the cutting tool (8) have substantially the same hardness.
9. Device according to any one of the preceding claims,
   characterised in that
   at least the counter-face (12) of the counter tool (10) comprises hardened steel.
10. Device according to any one of the preceding claims,
    characterised in that
    a rotating cutting bar or an oscillating cutting bar is provided as a cutting tool (8).
11. Device according to any one of the preceding claims,
    characterised in that
    the cutting tool (8) has individual cutting tool segments which can be moved from an active position into a passive position and vice-versa.
12. Method for producing transverse cuts in a web-like material which is guided in a continuous or discontinuous manner through a cutting device,
    involving the following method steps:

    - positioning a cutting tool (8) on a first side of the longitudinal path of the web-like material (1),

    - positioning a counter tool (10) on a second side of the longitudinal path of the web-like material (1),

    - selecting at least one portion of the web-like material (1),

    - transversely cutting the web-like material (1) in the region of the at least one selected portion,

    characterised in that
    in order to cut, the cutting tool (8) comes into direct contact with a blunt planar counter face (12) of the counter tool (10) that cannot be cut by the cutting tool (8), and the counter tool (10) can be displaced in a substantially horizontal manner from the active position into a passive position and vice-versa.
13. Method according to claim 12,
    characterised in that
    the web-like material (1) is cut without interrupting the web-like material (1).
14. Method according to claim 12 or 13,
    characterised in that
    the counter tool (10) comprises a plurality of counter-tool segments (11) which can be moved individually or in a state combined in groups in a substantially horizontal manner from an active position into a passive position and vice-versa.
15. Method according to any one of claims 12 to 14,
    characterised in that
    the web-like material (1) also rests on the counter-tool (10) or the counter-tool segment (11) in the passive position of the counter-tool (10) or the counter-tool segments (11).

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