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Method of manufacturing pneumatic tire

A technology of pneumatic tires and treads, which is applied in the field of manufacturing pneumatic tires, and can solve problems such as strip winding disorder, internal defects, and tire rubber exposure

Inactive Publication Date: 2006-02-01
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if the rubber belt (f) is wound on the tread reinforcing belt (e) such that the tread rubber is wider than the belt, then as Figure 8 The coiling of the strip is prone to confusion at a position (pe) adjacent to the edge of the belt (e) as shown by
As a result, vulcanized tires may have internal defects such as exposed rubber

Method used

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  • Method of manufacturing pneumatic tire
  • Method of manufacturing pneumatic tire
  • Method of manufacturing pneumatic tire

Examples

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Embodiment Construction

[0028] According to the present invention, a method of manufacturing a pneumatic tire includes forming a green tire 1 and vulcanizing the green tire 1 in a mold.

[0029] In this embodiment, the pneumatic tire is a radial tire comprising a tread portion 2; a pair of sidewall portions 3; a pair of axially spaced bead portions 4 each having a bead core therein; a carcass 6 between the bead portions; a tread reinforcing belt 15 arranged radially outside the carcass in the tread portion; and a rubber member. The rubber components include: tread rubber 14 arranged on the belt 15; anti-crack sidewall rubber 9 arranged axially outside the carcass in the sidewall portion to define the outer surface of the sidewall portion 3; The axially outer side and the bottom of the bead portion are arranged in the bead portion to define the anti-wear bead rubber 8 of the outer surface of the bead portion 4 .

[0030] The carcass 6 is composed of at least one ply arranged radially at an angle of 7...

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Abstract

The present invention provides a method of manufacturing a pneumatic tire comprises making a raw tire and vulcanizing the raw tire. The raw tire comprises a toroidal main body and a tread ring. The tread ring comprises a tread reinforcing belt and a raw tread rubber disposed on the radially outside of the tread reinforcing belt. The making of the tread ring comprises: using a forming drum which is provided with a pair of lateral cylindrical surfaces and a central cylindrical surface therebetween to define a depression having a depth and a width; winding the tread reinforcing belt on a central cylindrical surface so that the edges of the tread reinforcing belt are placed in edge zones of the depression; and forming the tread rubber by winding at least one rubber tape on a winding face which is formed by said lateral cylindrical surfaces and the outer circumferential surface of the tread reinforcing belt wound within the width of the depression, wherein in said edge zones, the depth of the depression is substantially the same as the thickness of the tread reinforcing belt.

Description

technical field [0001] The present invention relates to a method of manufacturing a pneumatic tire comprising tread rubber formed by winding a thin narrow rubber strip several times. Background technique [0002] When manufacturing a pneumatic tire, a green tire (a) is formed, and then the green tire (a) is vulcanized in a mold. [0003] Especially in the process of manufacturing green tires (a) for radial tyres, usually, such as Figure 7 As shown, the body (b) comprises a pre-formed cylindrical carcass which is expanded into a ring shape such that its crown (b1 ) is attached to the inside of a green tread ring (c) arranged around it. Here, the raw tread ring (c) is a component of the tread reinforcing belt layer (e) and the tread rubber (g). [0004] Usually, by winding the tread reinforcing belt (e) around the cylindrical surface of the building drum (d) and then applying a wider strip of tread rubber (g) to the outside of the belt (e) A green tread ring (c) is formed. ...

Claims

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Application Information

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IPC IPC(8): B29D30/06B29D30/60
CPCB29D30/60B29D30/242B29D30/70
Inventor 三木洋二郎
Owner SUMITOMO RUBBER IND LTD