METHOD OF USING CORRUGATED ZERO-DEGREE BELT TO MANUFACTURE TIRE

Abstract

A method of using a corrugated zero-degree belt to manufacture a tire. A belt ply structure includes a No. 1 belt ply, No. 2 belt ply, No. 3 belt ply, corrugated zero-degree belt, and shoulder wedge. In a belt ply structure of an all-steel radial tire, a zero-degree belt has a halved density and is wound in two turns, thus a strength problem of a joint portion is solved. The upper and lower ply are arranged in a staggered manner, thereby forming a single belt. The belt ply structure realizes restraining and fastening functions of a zero-degree belt ply while reducing costs and weight of a tire. The entire belt ply is flat and smooth and has consistent thickness. The belt ply structure can improve high-speed performance and abrasion resistance of a tire. Circumferential distribution of framework material is more uniform, thereby enhancing uniformity of the tire and driving comfort.

Claims

1. A belt ply structure of a pneumatic all-steel radial tire, wherein the belt ply structure comprises a No. 1 belt ply, a No. 2 belt ply, a No. 3 belt ply, a corrugated zero-degree belt, and a shoulder wedge.

2. A method of using corrugated zero-degree belt to manufacture a tire, comprising the steps of: (1) preparing corrugated belt strips: design special extrusion die to extrude corrugated belt strips with density lower than ordinary zero-degree belt ply; (2) reeling up corrugated belt strips: the extruded corrugated zero-degree belt ply is wrapped and reeled up by a plastic film with better preservation effect; (3) jointing belt ply: centering the first, second and third belt plies according to the normal belt structure; (4) winding corrugated zero-degree belt: the first layer of corrugated belt is wound at the corresponding belt ply position, and the first layer of corrugated belt ply is wound by the winding machine at an angle of 0-2 with the crown center; (5) using the method in the step (4) to wind the second layer of the corrugated belt, and the upper ply and the lower ply are arranged in a staggered manner to form a belt ply with closely doubled density of a single layer, and the end of the belt strips are overlapped by 0-30 mm.

3. The method, as recited in claim 2, wherein the belt strip with width of 25-50 mm, and halved density of the ordinary product is prepared using the new extrusion die.

4. The method, as recited in claim 2, wherein parallel winding is carried out above, below, or between the belt plies along the circumferential direction of the tire.

5. The method, as recited in claim 2, wherein the upper ply and the lower ply are arranged in a staggered manner, and the dislocation value is half of the distance between the centers of two adjacent cords in the single layer belt.

6. The method, as recited in claim 2, wherein belt ply overlapping mode: for the winding structure above the belt plies, the overlapping length is also 30 mm based on the existing form of the corrugated belt ply; for the structure below or between the belt plies, the two ends of the belt strip are at the same level, forming a complete cycle.

7. The method, as recited in claim 3, wherein the width of the belt strip is 35 mm.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0016] FIG. 1 is the ordinary 3+0 belt structure in the prior art;

[0017] FIG. 2 is the belt ply structure of a pneumatic all-steel radial tire described in the present invention;

[0018] FIG. 3 is a belt strip described in the present invention;

[0019] FIG. 4 is the structure of the upper belt and the lower belt arranged in a staggered manner described in the present invention;

[0020] In the figures: 1. Belt ply I, 2. Belt ply II, 3. Belt ply III, 4. Zero-degree belt winding, 5. Shoulder wedge, 11. No. 1 belt ply, 12. No. 2 belt ply, 13. No. 3 belt ply, 14. Corrugated zero-degree belt, 15. Shoulder wedge.

SPECIFIC EMBODIMENTS

[0021] A belt ply structure of a pneumatic all-steel radial tire. The belt ply structure comprises a No. 1 belt ply 11, a No. 2 belt ply 12, a No. 3 belt ply 13, a corrugated zero-degree belt 14, and a shoulder wedge 15.

[0022] A method of using corrugated zero-degree belt to manufacture a tire, comprising the steps of:

[0023] (1) Preparing corrugated belt strips: design special extrusion die to extrude corrugated belt strips with density lower than ordinary zero-degree belt ply;

[0024] (2) Reeling up corrugated belt strips: the extruded corrugated zero-degree belt ply is wrapped and reeled up by a plastic film with better preservation effect;

[0025] (3) Jointing belt ply: centering the first, second and third belt plies according to the normal belt structure;

[0026] (4) Winding corrugated zero-degree belt: the first layer of corrugated belt is wound at the corresponding belt ply position, and the first layer of corrugated belt ply is wound by the winding machine at an angle of 0-2 with the crown center;

[0027] (5) Using the method in the step (4) to wind the second layer of the corrugated belt, and the upper ply and the lower ply are arranged in a staggered manner to form a belt ply with closely doubled density of a single layer, and the end of the belt strips are overlapped by 0-30 mm.

[0028] A belt strip with width of 25-50 mm (35 mm is preferred), and halved density of the ordinary product is prepared using the new extrusion die.

[0029] Parallel winding is carried out above, below, or between the belt plies along the circumferential direction of the tire.

[0030] The upper ply and the lower ply are arranged in a staggered manner, and the dislocation value is half of the distance between the centers of two adjacent cords in the single layer belt;

[0031] Belt ply overlapping mode: For the winding structure above the belt plies, the overlapping length is also 30 mm based on the existing form of the corrugated belt ply. For the structure below or between the belt plies, the two ends of the belt strip are at the same level, forming a complete cycle.