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Method for producing pneumatic tire

A manufacturing method and technology of pneumatic tires, applied in the field of pneumatic tire manufacturing of pneumatic tires, can solve problems such as unfavorable tire weight reduction, achieve stable inflation and improve consistency

Inactive Publication Date: 2013-01-09
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the inner liner made of only butyl rubber needs to have a certain thickness in order to ensure sufficient air barrier performance, which is not conducive to reducing the weight of the tire.

Method used

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  • Method for producing pneumatic tire
  • Method for producing pneumatic tire
  • Method for producing pneumatic tire

Examples

Experimental program
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Embodiment Construction

[0045] Next, the method of manufacturing the pneumatic tire of the present invention will be described based on the embodiment shown in the drawings. Furthermore, the same reference numerals are used for the same components before and after vulcanization.

[0046] Figure 18The pneumatic tire 21 manufactured according to the present invention is exemplified in . In this pneumatic tire 21 , a carcass 24 is spanned between a pair of bead rings 25 , and the carcass 24 is folded back to the outside from inside around a bead core 25 a with a bead filler 25 b interposed therebetween. On the inner peripheral side of the carcass material 24, the joint rubber 23a, the film 23, and the inner liner 22 are laminated in this order. The innermost lining 22 is vulcanized butyl rubber, which together with the membrane 23 prevents air from penetrating. The thickness of the lining 22 is, for example, 0.2 mm to 2.5 mm, and the thickness of the film 23 is, for example, 0.005 mm to 0.2 mm.

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Abstract

In the disclosed method, a primary formed body (G1) is formed by a bead ring (25) being fitted to the outside of both ends in the widthwise direction of a cylindrical body having: a inner liner at the innermost periphery comprising butyl rubber; a film that is layered to the outside periphery thereof and that comprises a thermoplastic resin or a thermoplastic elastomer composition; and a carcass material disposed at the outside periphery thereof. The inner liner is prevulcanized in the state wherein the center in the widthwise direction of the primary formed body (G1) is caused to bulge in the outer peripheral direction and is held by suction to the inner peripheral surface of a transferring / holding mold (9) that has a similar shape to the outer peripheral surface of a rigid inner mold (11). After the rigid inner mold (11) is interpolated in the primary formed body (G1), the suction of the transferring / holding mold (9) is suspended, the primary formed body (G1) is transferred to the outer peripheral surface of the rigid inner mold (11), a green tire is formed at the outer peripheral surface of the rigid inner mold (11), and this green tire is vulcanized.

Description

technical field [0001] The present invention relates to a method for manufacturing a pneumatic tire, and more specifically, to a method for manufacturing a pneumatic tire capable of manufacturing a pneumatic tire that is light in weight and excellent in air-permeability and uniformity. Background technique [0002] There have been proposed various methods of manufacturing pneumatic tires by molding a green tire on the outer peripheral surface of a metal rigid inner mold, and then arranging the molded green tire and the rigid inner mold together in the inside of a vulcanization mold for vulcanization (e.g. , refer to Patent Document 1). According to such a manufacturing method using a rigid inner mold, the green tire can be molded into a shape close to that of the tire to be manufactured, so that the load acting on the green tire during vulcanization can be reduced. [0003] However, it is difficult to form a green tire by stacking tire components such as an inner liner in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/08B29C33/02B29C35/02B29L30/00
CPCB29D2030/0682B29D30/0681B29D30/0654B29D2030/062B29L2030/00B29D2030/0655B29D30/0661B29D30/10B29C33/02B29C35/02B29D30/08
Inventor 佐野拓三高田升
Owner THE YOKOHAMA RUBBER CO LTD
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