RIGID CORE FOR VULCANIZING TIRE AND MANUFACTURING METHOD OF PNEUMATIC TIRE

摘要

PROBLEM TO BE SOLVED: To provide a rigid core for vulcanizing a tire capable of realizing the high uniformity of the tire, and a manufacturing method of a pneumatic tire using the rigid core. SOLUTION: The rigid core X for vulcanizing the tire has the shape corresponding to the inner surface 24 of the cavity part of an unvulcanized tire 20 and is constituted by annularly arranging a plurality of segments 1. Each of the segments 1 is constituted of at least two segment bodies 3 and 4 divided in the diametric direction of the core and different in the coefficient of thermal expansion and the ratio (high/low) of the coefficients of the thermal expansion of two segment bodies 3 and 4 is 3 or above. COPYRIGHT: (C)2007,JPO&INPIT