Patent ID: 9039400
Filing Date: 2015-05-26
Classification: B29C,B29D,B29K,B29L

Abstract:
1. A rigid core for forming a tire comprising: a core body provided on an outer surface thereof with a tire forming surface configured to form thereon a green tire by sequentially sticking tire structural members, the rigid core being configured to be loaded together with the green tire formed on the tire forming surface into a vulcanization mold so as to subject the green tire to vulcanization molding between the vulcanization mold and the core body, wherein the core body comprises a plurality of divided core pieces configured to be divided inward and outward in a tire radial direction at a tire radial position P including a maximum width position P wherein an outward divided core piece disposed more outward in the tire radial direction than the maximum width position P wherein a coefficient of thermal expansion of the inward divided core piece is higher than a coefficient of thermal expansion of the outward divided core piece.