EP1555096A2 - Anvil for cutting web material and method for making transverse cuts in a web material using such an anvil - Google Patents

Abstract

The anvil has a blunt tool working against a cutting tool in an active position (cut position) so that a cut is not directly made. The blunt tool is made from hard material and is placed horizontally to the cutting position and can be moved into a passive position (non-cut position) and reversibly moved. The cut is made during the movement of the blunt tool against the cutting tool. An independent claim is included for a method for making transverse cuts in a web material using such an anvil.

Description

The present invention relates to a device for cutting sheet-like material according to the preamble of patent claim 1 and a Method for producing cross sections in a web-like material according to the preamble of claim 13.

In the manufacture of products from z. B. cardboard or corrugated cardboard is in Production process of a sheet-like material, which is usually in Form of roles provided is assumed. This web-like material is used in a continuous manufacturing process various products first by means of a slitter in several Longitudinal tracks (benefits) of certain width (first lane division) cut longitudinally 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 tracks (benefits) of different widths (second lane division after format change) are generated. In the transition area between the first and second web division, at least one cut is made in the transverse direction runs. To produce such a section is the invention Device and the inventive method provided.

US-A-5 152 205 shows a device for cutting web-like Material which has a rotating knife, which against a circumferential, made of elastic material existing belt cuts. The strap is replaced by a vertically movable cylinder with punch on the rotating blade supported in the active position (cutting position) in the opposite side Passive position (non-cutting position) but not supported.

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

From EP-A-0 894 583 B1 there is a device for cutting sheetlike Material known in the individual pieces of knife from a rotating roller fold out and these knives are in active position against a roller cut, which consists of soft material, in particular polyurethane. The soft material of the roller is subject to high wear, too small Lifetime leads.

The object of the present invention is to provide the generic Device and the generic method in such a way that on the one hand the service life of the device can be increased, on the other hand a high Cut safety exists.

The above object is the subject of claim 1 thereby solved that the counter tool to the cutting tool in the active position (Cutting position) a blunt, immediately with the web-like material in Connecting, not cutting the cutting tool counter surface forms. "Not cutable" means the counter tool should not be bought taken wear, as is the case in the prior art is. The web-like material is therefore using a not sliced counter bearing cut. Because the counter bearing is not capable of being cut, there is no need for frequent replacement. At the same time is through the device of the invention ensures a high cutting safety.

Conveniently, the counter tool made of hard material such. B. hardened steel. Characterized in that the counter tool substantially horizontally from the active position to a passive position (non-interface) and is reversible, on the one hand a reduced space requirement is made possible On the other hand, the counter tool in passive position for supporting the be used web-like material, since the movement of the Counter tool parallel to the plane of the web-like material.

Conveniently, the counter tool comprises individual tool segments, the essentially horizontally individually or in groups of the active in the Passivstellung and vice versa are specifically movable. This can vary depending on Selection of the relevant tool segments any partial cuts in any Length and arrangement made in the transverse direction to the web-like material become.

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

According to another embodiment of the present invention is Muted counter-tool, especially sprung. This will cause the knife in Active position somewhat relieved.

Conveniently, the counter tool is harder than the cutting tool. According to an alternative embodiment, counter tool and Cutting tool about the same hardness.

In a further advantageous embodiment of the present invention is as Cutting tool a rotating cutter bar or a swinging cutter bar intended.

For generating cross-sections of discrete size and arrangement has the Cutting tool in an alternative embodiment individual Cutting tool segments, which from an active position to a passive position and are reversible brought. 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.

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 counter surface of the counter tool that is not capable of being cut by the cutting tool.

Here, the cross-cutting over the entire width of the web-like Material or only part of it, d. H. without Interruption of the web-like material.

For generating cross sections of defined length and position, this includes Counter-tool expediently a plurality of Counter tool segments, individually or grouped together in the essentially horizontally from an active to a passive position and vice versa are movable.

Due to the horizontal mobility, it is possible that the web-like Material also in passive position of the counter tool or the respective Counter tool segment justifies a support for the web-like material.

Identical, recurring features are for 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 somewhat enlarged detail view of Figure 2 to illustrate the different positions of the cutting tool segments.

Fig. 4

a representation of the arrangement of the cutting tool segments according to the embodiment of FIG. 3 from a rear perspective view and

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 as. B. Corrugated board, which is processed in a continuous process. to simultaneous production of different sized products (eg Cartons made of corrugated cardboard), the web-like material 1 by Longitudinal sections 4 divided into several tracks ("benefits"). The right in Fig. 1 Section represents a first format width area with multiple uses 2. This first format width range is represented by a (not shown in FIG. 1) Cut knife assembly.

When changing the format widths to products of a different size takes place via the knife assembly a format width change of the first Bahnaufteilung to a second path division with benefits 3, which by the Section lines 5 is marked. This format width change also takes place in the continuous production process.

To ensure a smooth transition of the first format width range to the second format width range are in the transition range Cross sections 6 are provided. The cross section 6 in Fig. 1 connects one Longitudinal section 4 of the first format width range with a longitudinal section 5 of second format width range. Two more, positioned in the edge area Cross sections are in the range of the offset of the respective edge-side section (Trim).

Fig. 2 shows an expedient embodiment of the device according to the invention 7 for generating the cross section 6 in Fig. 1st

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

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

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

From the enlarged view of FIG. 3, the respective position of Counter tool segments 11 within the device 7 according to the invention clear. Thus, those counter-tool segments 11 which are in Transport direction A further downstream, in the active position, d. H. Cutting position, whereas the others are in the passive position.

The counter tool segments 11 are moved over each with these connected drive elements in the form of cylinders 17, the two positions, namely an extended as well as a retracted position allow. she are individually via (not shown in Fig. 3) control devices directly driven.

From the illustration of FIG. 4, the back view of Device 7 according to the invention can be seen. The in transport direction A advanced counter-tool segments 11 are those that are in Active position.

FIG. 5 shows the device according to the invention as described above Embodiment in section.

Immediately adjacent to the cutting tool 8 is the Counter tool 10. In between the cutting tool 8 and counter tool 10th formed gap runs the web-like material 1. The counter tool 10th 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 by a Knife adjustment on the side of the cutting tool 8 and / or by a height adjustment of the counter tool 10 can be realized. If not cut, is between the knife 9 and the Counter tool 10 a gap. During the cut are knife 9 and Counter tool 10 in direct contact. Appropriately, this is a Provided contact pressure, 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 at the Upper and underside each have a traverse 14. The Traverse 14 has expediently a (not shown in Fig. 5) height adjustment, with the the gap between cutting tool 8 and counter tool 10 are changed can.

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

To the device for cutting an active position (cutting position) in to bring a passive position (non-cutting position) and vice versa is that 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 on a carriage (not shown) by means an associated cylinder 17, which may be pneumatically movable via a (Also not shown) actuating cylinder movable. This allows the Counter surface 12 of the counter tool 10 in the active or passive position be brought, depending on whether a section of the web-like material. 1 desired or not.

According to the invention, the section by direct contact of the knife 9 at the Counter surface 12 of the existing hard material counter-tool 10th guaranteed.

In the embodiment of the invention shown in FIGS. 2-4 Device is the counter tool 10 in a variety of Sub-tool segments 11 divided, each individually and / or in groups are driven and according to need in the respective active or passive position are movable. This allows any cutting positions and / or Cutting lengths over the width of the web-like material 1 can be realized.

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

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

With the present invention, a significant extension of Service life of the generic device for cutting web-like Material reached. In addition, an increased cut safety guaranteed. Finally, the device according to the invention requires a comparatively small space requirement for the construction. All in all the invention consequently a very special enrichment of Related prior 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 (16)

Apparatus for cutting sheet-like material (1), which is continuously guided by the device along a feed path, with
a one-piece or multi-part cutting tool (8), which is provided across the width of the feed path, a counter tool (10) to the cutting tool (8), wherein the sheet-like material (1) with its top and bottom between the cutting tool (8) and Counter-tool (10) passes through,
characterized in that
the counter tool (10) to the cutting tool (8) in the active position (cutting position) forms a blunt counter surface (12) for the cutting tool (8), which is directly connected to the web-like material (1) and not cut by the cutting tool (8). Device according to claim 1,
characterized in that
the counter tool (10) consists of hard material. Apparatus according to claim 1 or 2,
characterized in that
the counter tool (10) is substantially horizontally movable from the active position to a passive position (non-cutting position) and vice versa. Device according to one of the preceding claims,
characterized in that
the counter tool (10) individual tool segments (11) which are substantially horizontally individually and / or in groups from the active to the passive position and vice versa, has. Device according to one of the preceding claims,
characterized in that
a support device (13) for the counter-tool (10) is provided. Device according to claim 5,
characterized in that
as a supporting device (13), in particular stationary, Traverse (14) is provided. Device according to one of the preceding claims,
characterized in that
the counter-tool (10) is damped, in particular sprung. Device according to one of the preceding claims,
characterized in that
the counter tool (10) is harder than the cutting tool (8). Device according to one of claims 1-7,
characterized in that
the counter tool (10) and the cutting tool (8) have approximately the same hardness. Device according to one of the preceding claims,
characterized in that
at least the counter surface (12) of the counter tool (10) made of hardened steel. Device according to one of the preceding claims,
characterized in that
as cutting tool (8) a rotating cutter bar or pendulum cutter bar is provided. Device according to one of the preceding claims,
characterized in that
the cutting tool (8) has individual cutting tool segments, which can be brought from an active to a passive position and vice versa. Method for producing cross sections in a web-like material, which is guided continuously or discontinuously through a cutting device,
with the following process steps: Positioning a cutting tool (8) on a first side of the longitudinal path of the sheet-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 a portion of the sheet-like material (1), Transverse cutting of the web-like material (1) in the region of the at least one selected section, characterized in that
for cutting the cutting tool (8) with a blunt, by the cutting tool (8) non-cutting mating surface (12) of the counter tool (10) comes into direct contact. Method according to claim 13,
characterized in that
the web-like material (1) is cut without interruption of the web-like material (1). Method according to claim 13 or 14,
characterized in that
the counter-tool (10) comprises a plurality of counter-tool segments (11), which can be moved individually or in groups substantially horizontally from an active to a passive position and vice versa. Method according to one of claims 13 to 15,
characterized in that
the web-like material (1) also rests in the passive position of the counter-tool (10) or the counter-tool segments (11) on the counter-tool (10) or the counter-tool segment (11).

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