RIGID CORE FOR FORMING TIRE - SUMITOMO RUBBER IND

Title:

RIGID CORE FOR FORMING TIRE

Document Type and Number:

WIPO Patent Application WO/2013/140964

Kind Code:

A1

Abstract:

A rigid core for forming a tire is configured so that the non-uniformity of the amount of thermal expansion of the core body is reduced to improve the quality of the tire. The core body comprises divided core pieces (10i, 10o) divided into the inner and outer portions in the radial direction of the tire at a position (P) in the radial direction of the tire, the position (P) including the maximum width position (PO) of the tire forming surface. The divided core pieces (10o) which are disposed further toward the outside in the radial direction of the tire than the maximum width position and the divided core pieces (10i) which are disposed on the inside in the radial direction of the tire are formed from metallic materials having different coefficients of thermal expansion. The coefficient of thermal expansion of the divided core pieces (10i) on the inside is higher than the coefficient of thermal expansion of the divided core pieces (10o) on the outside.

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Inventors:

KOHARA KEI (JP)

Application Number:

PCT/JP2013/055137

Publication Date:

September 26, 2013

Filing Date:

February 27, 2013

Export Citation:

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Assignee:

SUMITOMO RUBBER IND (JP)

International Classes:

B29C33/02; B29C35/02; B29D30/12; B29L30/00

Foreign References:

JP2003311741A	2003-11-05
JP2008207342A	2008-09-11
JP2006264018A	2006-10-05
JP2006160236A	2006-06-22

Other References: