RIGID CORE FOR TIRE FORMATION AND TIRE PRODUCTION METHOD USING SAME

摘要

Provided is a rigid core for tire formation that limits the rubber stuck between inner mold segments in an inner mold segment while mi ni mi zi ng the occurrence of unevenness in the radial direction between inner mold segments that is caused by thermal expansion. A core main body 2 is divided into: a first inner mold segment 5A in which both circumferential end surfaces 5As are inclined radially inward in a di recti on in which the circumferential width increases; a second inner mold segment 5B that is arranged in an alternating manner with the inner mold segment 5A and in which both circumferential end surfaces 5Bs are inclined radially inward in a direction in which the circumferential width decreases; and a butting member 6 that is arranged between the fi rst inner mold segment 5A and the second inner mold segment 5B. Young's modulus Ea of the butting member 6 is smaller than Young's modulus Eb of the first and second inner mold segments 5A and 5B.