METHOD FOR SPLICING MATERIAL WEBS AND SPLICING DEVICE

Abstract

In a method for splicing material webs and an associated splicing device it is envisaged, for producing an improved joint, to join the material webs in the area of cut edges essentially overlap-free to form an endless material web, the cut edges being produced by cutting the material webs at least along a first cutting direction and along a second cutting direction, and the cutting directions enclosing an angle α such that 0°<α<180° applies.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a schematic side view of a splicing device according to a first embodiment example,

FIG. 2 shows a first detail of a cutting and joining device of the splicing device in FIG. 1,

FIG. 3 shows a second detail of the cutting and joining device of the splicing device in FIG. 1,

FIG. 4 shows a top view onto a joining area of an endless material web produced by means of the splicing device in FIG. 1,

FIG. 5 shows a cross-section of the endless material web in FIG. 4,

FIG. 6 shows a top view onto a joining area of an endless material web produced by means of a splicing device according to a second embodiment example, and

FIG. 7 shows a top view onto a joining area of an endless material web produced by means of a splicing device according to a third embodiment example.

Claims

1. Method for splicing material webs, comprising the following steps: a. unrolling of a first material web from a first material roll;b. producing of a first cut edge by cutting a second material web at least along a first cutting direction and along a second cutting direction, the cutting directions enclosing an angle α such that 0°<α<180° applies;c. producing of a second cut edge complementary to the first cut edge by cutting the first material web at least along the first cutting direction and along the second cutting direction;d. joining of the first material web with the second material web in the area of the cut edges to form an endless material web, the first material web and the second material web being arranged relative to each other essentially overlap-free; ande. unrolling of the second material web from a second material roll.

2. Method according to claim 1, wherein for the angle α of the cutting directions 30°≦α≦150° applies.

3. Method according to claim 1, wherein for the angle α of the cutting directions 45°≦α≦135° applies.

4. Method according to claim 1, wherein for the angle α of the cutting directions 60°≦α≦120° applies.

5. Method according to claim 1, wherein the first material web and the second material web engage into each other in a joining area along a transportation direction of the material webs.

6. Method according to claim 1, wherein the cut edges each form at least one cut edge projection and at least one cut edge recess.

7. Method according to claim 6, wherein the at least one cut edge projection and the at least one cut edge recess have a rectangular or square shape.

8. Method according to claim 6, wherein the at least one cut edge projection and the at least one cut edge recess have a triangular shape.

9. Method according to claim 6, wherein the at least one cut edge projection and the at least one cut edge recess have a wave-like shape.

10. Method according to claim 1, wherein the joining takes place by means of a single-sided adhesive tape.

11. Splicing device for the splicing of material webs, having a. a first unrolling device for unrolling a first material web from a first material roll,b. a second unrolling device for unrolling a second material web from a second material roll, andc. at least one cutting and joining device for the cutting and joining of the material webs to form an endless material web, wherein i. the cutting and joining device exhibits at least one first cutting section running along a first cutting direction,ii. the cutting and joining device exhibits at least one second cutting section running along a second cutting direction, andiii. the cutting directions enclose an angle α such that 0°<α<180° applies.

12. Splicing device according to claim 11, wherein the cutting sections are formed on at least one knife bar.