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
CN1772465AInactive Publication Date: 2006-05-17SUMITOMO RUBBER IND LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUMITOMO RUBBER IND LTD
Publication Date
2006-05-17
Estimated Expiration
Not applicable · inactive patent

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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.
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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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