Producing method of pneumatic tire

A technology for pneumatic tires and a manufacturing method, which is applied to tire parts, tire treads/tread patterns, tires, etc., can solve the problem of difficulty in setting conductive through terminals, etc., and achieve the effect of high productivity

Inactive Publication Date: 2006-05-17
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the rubber strip g of the tread rubber a2 is continuously wound, it is difficult to provide a conductive through terminal

Method used

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  • Producing method of pneumatic tire
  • Producing method of pneumatic tire
  • Producing method of pneumatic tire

Examples

Experimental program
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Effect test

Embodiment Construction

[0031] An embodiment of the present invention will be described below based on the drawings.

[0032] figure 1 is a cross-sectional view of a pneumatic tire 1 manufactured by the method of the present invention. The pneumatic tire 1 includes: an annular carcass 6 extending from the tread portion 2 to the bead core 5 of the bead portion 4 via the sidewall portion 3; outside and on the inside of the tread portion 2.

[0033] The carcass 6 includes, for example, a carcass ply 6A of radial structure. The carcass ply 6A includes, for example, an annular main body portion 6 a extending between the bead cores 5 and 5 , and a pair of turned-back portions 6 b continuously extending from both sides of the main body portion 6 a around the bead core 5 . Fold the tire axially from the inside to the outside. A bead apex 8 extending radially outward from the bead core 5 is arranged between the main body portion 6 a and the turnback portion 6 b of the carcass ply 6A.

[0034] The tread r...

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Abstract

It is an object of the present invention to provide a method of manufacturing a pneumatic tire capable of releasing the static charge of a vehicle to a road surface. A pneumatic tire manufacturing method for manufacturing a pneumatic tire in which a tread portion includes: an electrically conductive inner conductive portion which conducts with a rim when the rim is assembled; and an annular cap rubber portion thereof, in which The peripheral surface is in contact with the inner conductive part and its outer peripheral surface is in contact with the road surface. The manufacturing method includes a cap rubber forming step for forming a cylindrical unvulcanized cap rubber by helically winding a band-shaped unvulcanized rubber strip 28 around the central axis of a substantially cylindrical wound body 23 part, wherein the cover rubber forming step includes a simultaneous winding step for simultaneously winding the non-conductive rubber strip 28A and the conductive rubber strip around the body to be wound by using the applicators 24A and 24B which guide the rubber strips 28A and 28B with 28B.

Description

technical field [0001] The present invention relates to a method of manufacturing a pneumatic tire capable of discharging the static charge of a vehicle to a road surface. Background technique [0002] In recent years, silica has been incorporated into tread rubber of pneumatic tires. Silica has the advantage of reducing the tire's rolling resistance and improving wet grip. However, this leads to an increase in tire resistance because silica has poor electrical conductivity. If the tire has a large electrical resistance, static charges are accumulated in the vehicle, and disturbances such as radio noise are liable to be generated. [0003] Conventionally, in order to prevent accumulation of static charges in a vehicle, Published Japanese Patent Application H9-71112 proposes a tread rubber a1 as shown in FIG. 13(A). The tread rubber a1 includes a base rubber portion b made of conductive carbon-rich rubber, and a cap rubber layer c made of non-conductive silica-rich rubber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/60B60C11/00B60C19/08
CPCB29D30/30B29D30/60B29D2030/526
Inventor 三木洋二郎
Owner SUMITOMO RUBBER IND LTD
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