TIRE MANUFACTURING METHOD - SUMITOMO RUBBER IND

Title:

TIRE MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2015/079757

Kind Code:

A1

Abstract:

The present invention increases tire formation precision and is a tire manufacturing method, which comprises a step (S1) for forming a green tire (Tn) on the outer surface (S) of a rigid inner ring (1) and a vulcanization step (S2) for vulcanizing the green tire (Tn). The rigid inner ring (1) comprises: an inner ring body (3), which is obtained from multiple segments (4); a core (5), which substantially binds the various segments (4); and an outer diameter-adjustment means (33) for changing the outer diameter (D1) of the core (5) by changing the temperature of the core (5). Moreover, the rigid inner ring (1) performs changes such that by expansion of the outer diameter (D1) of the core (5), the various segments (4) move outward in the radial direction of the tire and gaps (G) between the segments (4) are enlarged, while by reducing the outer diameter (D1) of the core (5), the various segments (4) move inward in the radial direction of the tire and the level differences (R) on the outer surface (S) between adjacent segments (4) increase. The vulcanization step (S2) comprises an adjustment step (S21) for adjusting the outer diameter (D1) of the core (5) using the outer diameter adjustment means (33) so that the gaps (G) and the level differences (R) are within a previously established range.

Inventors:

TSUNODA MASAYA (JP)
KOHARA KEI (JP)
TANAKA TAKASHI (JP)

Application Number:

PCT/JP2014/072317

Publication Date:

June 04, 2015

Filing Date:

August 26, 2014

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SUMITOMO RUBBER IND (JP)

International Classes:

B29C35/02; B29C33/02; B29D30/10

Foreign References:

JP2013006390A	2013-01-10
JP2003311741A	2003-11-05
JP2001088143A	2001-04-03
JP2013006366A	2013-01-10
JP2013193310A	2013-09-30
JP2013006367A	2013-01-10

Other References: