Conveying, Driving and Pressing Belt with Reinforcing Insert

Abstract

A transport, driving or pressing belt, comprising at least one belt material having a lower and an upper face limited by two longitudinal edges and two transverse edges running obliquely with respect to the main extension direction of the belt, the belt material being closed and the longitudinal edges being folded down, and a method for manufacturing a transport, driving or pressing belt. To ensure high tensile strength over the complete belt length and avoid an edge tearing of the first belt material at the longitudinal edges, the transverse edges of a first belt material lie against each other in abutting relationship, and a second belt material is arranged centrically on the first belt material at least in the region of the transverse edges. The second belt material here nearly covers a width of 50% of the first belt material and is centrically glued with the first belt material.

Claims

1. Transport, driving or pressing belt (1), in particular for belt grinding machines, comprising at least one belt material (2) with a lower and an upper face which is limited by two longitudinal edges (3, 4) and two transverse edges (5, 6) extending obliquely with respect to the main extension direction of the belt, wherein the belt material (2) is closed and the longitudinal edges (3, 4) are folded down, characterized in that the transverse edges (5, 6) are lying against each other in abutting relationship, and a second belt material (10) is arranged centrically on the first belt material (2) at least in the region of the transverse edges (11, 12) and covers nearly 50% of the belt's width and is bordered by the folded edges, whereby a three-layer arrangement is formed at least in the region of the transverse edges (5, 6) of the first belt material (2).

2. Transport, driving or pressing belt (1) according to claim 1, characterized in that a three-layer arrangement is present over the complete face of the first belt material (2).

3. Transport, driving or pressing belt (1) according to claim 1, characterized in that both the first (2) and the second belt material (10) consist of the same material, or that the second belt material (10) comprises a material having a lower or higher tensile strength in the longitudinal direction.

4. Transport, driving or pressing belt (1) according to claim 1, characterized in that the second belt material (10) is, after the longitudinal edges (3, 4) of the first belt material (2) have been folded in, completely covered and the two longitudinal edges (3, 4) nearly touch each other.

5. Transport, driving or pressing belt (1) according to claim 1, characterized in that the folded edge regions are glued with the upper or lower face.

6. Transport, driving or pressing belt (1) according to claim 1, characterized in that between the folded regions and the upper and/or lower face, reinforcing fibres, strings or wires are arranged.

7. Transport, driving or pressing belt (1) according to claim 1, characterized in that the reinforcing fibres, strings or wires are essentially oriented in the main extension direction of the first belt material (2).

8. Transport, driving or pressing belt (1) according to claim 1, characterized in that the reinforcing fibres, strings or wires consist of plastic, natural fibres or metal.

9. Transport, driving or pressing belt (1) according to claim 1, characterized in that the folded regions are connected with pressing elements.

10. Transport, driving or pressing belt (1) according to claim 1, characterized in that the pressing elements are glued with the folded regions.

11. Transport, driving or pressing belt (1) according to claim 1, characterized in that the pressing elements consist of felt, rubber or graphite.

12. Transport, driving or pressing belt (1) according to claim 1, characterized in that the upper face and the lower face of the first belt material (2) comprises a width of 30 to 400 mm, and/or that the distance between the upper face or the lower face is 0.1 to 2 mm before the folding procedure.

13. Transport, driving or pressing belt (1) according to claim 1, characterized in that the folded regions each comprise 50% of the upper or lower face.

14. Transport, driving or pressing belt (1) according to claim 1, characterized in that between the folded regions and the upper face and/or lower face, at least one detection element is arranged.

15. Transport, driving or pressing belt (1) according to claim 1, characterized in that the detection element at least partially consists of metal.

16. Method for manufacturing a transport, driving or pressing belt (1), in particular for belt grinding machines, comprising at least one belt material (2) with a lower and an upper face which is limited by two longitudinal edges (3, 4) and two transverse edges (5, 6) extending obliquely with respect to the main extension direction of the belt, wherein the belt material (2) is closed and the longitudinal edges (3, 4) are folded, characterized in that the two transverse edges (5, 6) are placed against each other in abutting relationship and folded down onto a second belt material (10) together with the longitudinal edges (3, 4) which is glued with the first belt material (2), and the folded regions are glued with the outer face of the second belt material (10), wherein the overlapping region along the transverse edges (5, 6) forms, together with the second belt material (10), a three-layer arrangement at least across the region of the transverse edges (5, 6) of the first belt material (2).

17. Method according to claim 16, characterized in that a second belt material (10) is joined with the transverse edges (11, 12) in abutting relationship in such a manner that a three-layer arrangement is formed over the complete length of the first belt material (2).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The invention will be further illustrated again below with reference to the figures.

[0032] In the drawings:

[0033] FIG. 1 shows, in a perspective view, the individual steps for manufacturing the belt, and

[0034] FIG. 2 shows, in a plan view, the individual steps for manufacturing the belt.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] FIG. 1 shows, in a perspective view, the individual manufacturing steps for manufacturing a transport, driving or pressing belt 1.

[0036] A first belt material 2 with longitudinal edges 3, 4 and transverse edges 5, 6 is placed against each other in abutting relationship with its transverse edges 5, 6 according to step 2. Furthermore, a second belt material 10 with transverse edges 11, 12 is placed centrically onto the first belt material 2, also lying in abutting relationship, and glued, as is shown in step three. The second belt material 10 here nearly covers up to 50% of the width of the first belt material 2, so that the longitudinal edges 3, 4 of the first belt material 2 may be folded inwards. This folding step follows after the gluing of the first and second belt materials 2, 10. The longitudinal edges 3, 4 are also glued with the upper side of the second belt material 10, so that gluing is accomplished over the whole surface of the first and second belt materials 2, 10. The folding procedure is shown in step four, while in step five, the completed transport, driving or pressing belt 1 is shown. The two longitudinal edges 3, 4 are in this case lying close to each other, quasi folded in abutting relationship, and glued with the second belt material 10. The second belt material is here also lying in abutting relationship with its transverse edges 11, 12. After the folding of the longitudinal edges 3, 4 of the first belt material 2 towards the centre, the transverse edges 5, 6 have a zigzagged arrangement in the completed transport, driving or pressing belt 1.

[0037] The advantage of this transport, driving or pressing belt 1 is that the now obtained outer longitudinal edges 15, 16 form a stable outer edge which only has a supposed weak point in one single point 17, 18. This, however, is prevented by a second belt material having been folded through the longitudinal edges, and thus a three-layer design is present for the whole length of the transport, driving or pressing belt 1.

[0038] FIG. 2 shows steps 1 to 5 again in a plan view. The loose belts of the first belt material 2 are placed against each other in abutting relationship. Equally, the first 2 as well as the second belt material 10, which is subsequently glued with the first belt material 2 centrically in the longitudinal direction, are placed together. After gluing, the longitudinal edges 3, 4 of the first belt material 2 are folded in, wherein the second belt material 10 has a width of nearly 50% of the first belt material 2, so that the longitudinal edges 3, 4 may be folded completely up to the centre in abutting relationship. By the folding in, in the first belt material 2, a zigzagged arrangement of the transverse edges 5, 6 is formed, while the second belt material 10 comprises obliquely extending transverse edges 11, 12 which are not changed during the folding operation. Moreover, there is an offset between the transverse edges 3, 4 of the first belt material 2 and the transverse edges 11, 12 of the second belt material 10, so that high tensile strength may be ensured over the complete length of the transport, driving or pressing belt 1.

LIST OF REFERENCE NUMERALS

[0039] 1 transport, driving or pressing belt

[0040] 2 belt material

[0041] 3 longitudinal edge

[0042] 4 longitudinal edge

[0043] 5 transverse edge

[0044] 6 transverse edge

[0045] 10 belt material

[0046] 11 transverse edge

[0047] 12 transverse edge

[0048] 15 longitudinal edge

[0049] 16 longitudinal edge

[0050] 17 point

[0051] 18 point