MOLD FOR VULCANIZATION-MOLDING TIRE

摘要

PROBLEM TO BE SOLVED: To provide a mold for vulcanization-molding tires keeping vent holes arranged so as to guide rubber uniformly over the whole circumference in order to prevent the poor filling of the rubber. SOLUTION: The mold for vulcanization-molding tires has circumferential ribs 2 divided with circumferential grooves 1 on the tread surface and treadware indicators 3 in the circumferential grooves 1. In recessed portions 12 of the inside surface of a mold portion for molding the tread surface in which the circumferential ribs 2 are molded, vent holes 15 for discharging air are arranged alternately at certain intervals and in a zigzag pattern in the circumference of the tire in the vicinity of the side ends on both sides along raised portions 11 and 11 for formation of the circumferential grooves 1 and 1 and with base points being positions in the vicinity of portions 13 and 13 for molding of the treadware indicators 3 and 3 in individual raised portions 11 and 11. COPYRIGHT: (C)2008,JPO&INPIT