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Manufacturing method of pneumatic tire

A technology for a pneumatic tire and a manufacturing method, which is applied to tires, other household appliances, household appliances, etc., can solve the problems of increased winding time, longer forming time, cracks in rubber belts, etc., so as to improve production efficiency and improve adhesion. , to ensure the effect of uniformity

Inactive Publication Date: 2009-01-28
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to this method, although the shape uniformity of the rubber member is improved, the winding man-hour is increased and the molding time becomes longer
In addition, there is a problem that cracks tend to occur along the interface of the rubber belt

Method used

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  • Manufacturing method of pneumatic tire
  • Manufacturing method of pneumatic tire
  • Manufacturing method of pneumatic tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Embodiments of the present invention will be described with reference to the drawings.

[0024] figure 1 is a half cross-sectional view showing a tire meridian of an example of a pneumatic tire manufactured according to the present invention. The pneumatic tire includes a pair of bead portions 1 , sidewall portions 2 extending radially outward from the respective bead portions 1 of the tire, and a tread portion 3 provided between these sidewall portions 2 . In the bead portion 1 are arranged an annular bead 1a constituted by an aggregate of bead wires, and a bead filler 12 formed into a triangular cross-sectional shape on the outer side of the bead 1a in the tire diameter direction, and The ends of the carcass ply 14 are rolled up outside in such a manner that they are clamped, wherein the bead wires are made of steel wire or the like.

[0025] An inner liner rubber 5 for maintaining air pressure is arranged on the inner peripheral side of the carcass ply 14 . Furthe...

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PUM

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Abstract

Provided is a manufacturing method of pneumatic tire. A side surface of an apex rubber is exposed annularly by injection molding the annular apex rubber and opening a forming mold while retaining the annular apex rubber in an unvulcanized state. Further, a side surface of a rubber pad is exposed annularly by injection molding the annular rubber pad and opening a forming mold while retaining the annular rubber pad in an unvulcanized state. Thereafter, an integrated compound rubber member is formed by overlapping a lower mold retaining the apex rubber and a lower mold retaining the rubber pad and laminating the side surface of the apex rubber to the side surface of the rubber pad, and an unvulcanized tire is formed by laminating the compound rubber member to the carcass ply.

Description

technical field [0001] The present invention relates to a manufacturing method of a pneumatic tire including the step of forming a green tire (unvulcanized tire) by laminating a plurality of rubber members on a carcass ply formed into a tubular shape. Background technique [0002] A pneumatic tire is a rubber compound constructed by laminating various rubber members to the inside and outside of a frame composed of carcass plies, and a plurality of rubber members are laminated on a production line in a manufacturing step to be On the carcass ply formed into a tubular shape, thereby forming a green tire. These rubber members include those wound on an in-line forming drum or carcass ply to be formed into a ring shape or a cylinder, and rubber members preformed into a ring shape according to off-line manufacturing to be supplied to a production line when necessary. [0003] The rubber member that can be manufactured off-line as described above has generally been manufactured by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/52
CPCB29D30/32B29D2030/724B29D30/72B29D30/0678B29C45/1459B29L2030/001
Inventor 濑川政弘
Owner TOYO TIRE & RUBBER CO LTD
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