Tire vulcanization mold and tire manufacturing method

A technology for vulcanizing molds and tires, applied in the direction of tire tread/tread pattern, tire parts, tires, etc., can solve problems such as uneven rigidity and partial wear, and achieve the effect of restraining bending or breaking and restraining damage

Pending Publication Date: 2021-04-16
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the rigidity of the tread portion becomes uneven in the tire circumferential direction, and a new problem of partial wear in the tire circumferential direction arises.

Method used

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  • Tire vulcanization mold and tire manufacturing method
  • Tire vulcanization mold and tire manufacturing method
  • Tire vulcanization mold and tire manufacturing method

Examples

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Effect test

Embodiment Construction

[0035] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

[0036] figure 1 Represent using vulcanization mold 1 of the present invention ( figure 2 Shown) is a developed view of the tread portion 2 of the manufactured tire T.

[0037] Such as figure 1 As shown, a plurality of sipes 3 arranged in the tire circumferential direction are arranged on the tread portion 2 . In this example, the tread portion 2 has a plurality of (for example, four) circumferential grooves 4 extending in the tire circumferential direction, and by the circumferential grooves 4, the tread portion 2 is divided into a plurality of (for example, four) extending in the tire circumferential direction. 5) Rib-shaped land part 5. In addition, a plurality of sipes 3 arranged along the tire circumferential direction are arranged on at least one rib-shaped land portion 5 (in this example, each rib-shaped land portion 5 ).

[0038] As the rib-shaped land p...

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Abstract

The invention provides a tire vulcanization mold and a tire manufacturing method, which can suppress damages such as bending or breaking of a blade, and can homogenize the rigidity of a tread part in the circumferential direction of a tire so as to suppress uneven wear in the circumferential direction of the tire. A tire vulcanization mold (1) is provided with a plurality of sipes (3) arranged in the circumferential direction of a tire. The tire vulcanization mold (1) is provided with a tread mold (10) in which a plurality of blades (14) for forming sipes (3) are provided on a tread molding surface (10S). The tread mold (10) is composed of a plurality of split molds (15) which are divided in the circumferential direction of the tire and can move in the radial direction of the tire, and the number of divisions of the split molds (15) is 17-29.

Description

technical field [0001] The present invention relates to a tire vulcanization mold and a tire manufacturing method in which a plurality of sipes arranged in the tire circumferential direction are arranged on a tread portion. Background technique [0002] In tires such as studless tires and snow tires, in order to improve performance on ice, a plurality of sipes arranged in the tire circumferential direction are formed on the outer surface of the tread portion. [0003] Such tires are vulcanized and molded by a vulcanization mold including an annular tread mold. The tread mold has a tread molding surface for molding the outer surface of the tread portion, and a plurality of blades for sipe forming protruding from the tread molding surface. In addition, the tread mold is composed of a plurality of split molds divided in the tire circumferential direction by dividing planes. [0004] Here, each blade protrudes inward in the tire radial direction toward the tire axis. In addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/42B29C33/44B29C35/02B29L30/00
CPCB29D30/0629B29D2030/0613B29D30/0606B29C33/44B29C33/424B29D2030/0612B60C11/12B60C2011/0341
Inventor 细田恭弘
Owner SUMITOMO RUBBER IND LTD
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