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Method of producing pneumatic tire and housing holder of bead member

A technology for pneumatic tires and manufacturing methods, applied to tire parts, vehicle parts, tires, etc., which can solve the problems of unrecorded bead parts manufacturing processes, etc., and achieve the effect of suppressing poor molding

Active Publication Date: 2020-05-05
TOYO TIRE & RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no description of the manufacturing process of the bead member

Method used

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  • Method of producing pneumatic tire and housing holder of bead member
  • Method of producing pneumatic tire and housing holder of bead member
  • Method of producing pneumatic tire and housing holder of bead member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0027] A pneumatic tire according to one embodiment includes a pair of bead portions 10 , a pair of sidewall portions 12 extending outward in the tire radial direction from the bead portions 10 , and a tread portion provided between the pair of sidewall portions 12 . 14.

[0028] An annular bead core 16 and an annular bead cover 18 disposed on the outer peripheral side of the bead core 16 are respectively embedded in the pair of bead portions 10 . The bead core 16 is coated with a constricting body such as a steel wire with rubber, and in this example, the cross-sectional shape of the bead core 16 is substantially hexagonal. The bead cover 18 is made of hard rubber and is a rubber member having a cross-sectional shape that becomes narrower toward the tip.

[0029] An annular carcass ply 20 is disposed between the pair of bead portions 10 . The carcass ply 20 is forme...

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Abstract

The invention provides a method of producing a pneumatic tire, which can suppress curl of a bead filler in a bead member. A method of producing a pneumatic tire includes the steps of fabricating a bead member (32) by integrating a bead filler (18) formed by extrusion molding with a bead core (16) in a state where a temperature difference between an edge part (18A) and a root part (18B) of the beadfiller is 25DEG C. or less as well as a temperature at the edge part is 39DEG C or more, cooling the bead member (32) by being placed on a support surface (50) supporting a side surface (18D) of thebead filler (18) and forming a green tire (34) using the cooled bead member (32).

Description

technical field [0001] Embodiments of the present invention relate to a method of manufacturing a pneumatic tire. Moreover, it also relates to the storage holder of the bead member used for manufacturing a pneumatic tire. Background technique [0002] Embedded in the bead portion of the pneumatic tire are: an annular bead core and a bead sheath. In the manufacture of this pneumatic tire, when a bead member composed of a bead core and a bead cover is to be produced, an extruded bead cover having a substantially triangular cross-section is used, and the two ends of the bead cover are Joining is performed to form a ring shape. Thereafter, the thick side base of the bead cover is crimped to the outer peripheral surface of the bead core, and the front end side of the bead cover is raised. Accordingly, a bead member is manufactured in which a bead cover rubber having a cross-sectional shape whose width becomes narrower toward the tip is integrated with the outer peripheral side...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D30/48B60C15/06
CPCB29D30/48B60C15/06B29C48/12B29C48/911B29D2030/481B29C48/022B29D30/0016B29D2030/0044
Inventor 儿玉纪彦
Owner TOYO TIRE & RUBBER CO LTD
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