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Pneumatic tire and method for manufacturing the same

A technology for pneumatic tires and sidewalls, applied in the field of manufacturing pneumatic tires, can solve problems such as tire surface deformation and internal tire structural defects, and achieve the effect of avoiding air bubbles.

Inactive Publication Date: 2008-12-10
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If gaps remain in the finished tire as large air bubbles, defects in the internal tire structure, deformation of the tire surface, etc. are likely to occur

Method used

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  • Pneumatic tire and method for manufacturing the same
  • Pneumatic tire and method for manufacturing the same
  • Pneumatic tire and method for manufacturing the same

Examples

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Embodiment Construction

[0025] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] According to the present invention, as shown in FIG. 1 , a pneumatic tire 1 includes a tread portion 2, a pair of sidewall portions 3, a pair of bead portions 4, a carcass 6 extending between the bead portions 4, and a tread reinforcement. Belt 8, Tread Reinforcement The belt 8 is provided radially outward of the carcass in the tread portion.

[0027] In the ensuing description, unless otherwise indicated, various dimensions, positions, etc. refer to the dimensions, positions, etc. of the tire under its normal inflated, unloaded condition.

[0028] The normal inflation, no load condition has the tire mounted on a standard rim and inflated to standard pressure, but no tire load is applied. Standard rims are rims for tires that are officially recognized by standards organizations, namely JATMA (Japan and Asia), T&RA (North America), ETRTO (Europe), S...

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PUM

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Abstract

A pneumatic tire comprises a carcass ply extending between bead portions through a tread portion and sidewall portions. The carcass ply is formed by arranging unvulcanized strip pieces around a surface of a toroidal core which surface has a horseshoe-shaped profile, whereby the carcass ply is made up of a plurality of circumferentially arranged strip pieces. The strip pieces are each made of rubberized parallel cords extending between the bead portions through the tread portion and sidewall portions. In the green tire, the strip pieces are each provided on at least one side thereof with a plurality of vent grooves having a depth of 0.1 to 2.0 mm and a width of 0.1 to 3.0 mm.

Description

technical field [0001] The present invention relates to a method for manufacturing a pneumatic tire provided with a carcass ply formed by circumferentially arranging a large number of bead-to-bead-extending pieces. Background technique [0002] Hitherto, in the process of manufacturing pneumatic tires, green tires—that is, unvulcanized tires—are formed by using tire building drums. Since this tire building drum is cylindrical, after some tire components including the carcass ply are wound or applied to the building drum as shown in FIG. 15(A), the tire is made as shown in FIG. The assembly (AS) is expanded and the remaining tire components are placed onto the assembly to complete the green tire build. [0003] On the other hand, in recent years, for example in European patent application EP-0928702-A1, it has been proposed to replace such a cylindrical tire building drum with an annular core having a horseshoe shape similar to the contour of the inner surface of a vulcanize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C9/04B60C9/02B60C9/20B60C13/00B60C15/00
CPCB29D30/1642B29D30/165B29D30/3042B29D30/305B29D30/38B29D2030/0682B29D2030/1671B29D2030/3071B60C9/023
Inventor 坂本雅之黑木武
Owner SUMITOMO RUBBER IND LTD
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