| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust plug used for the vent hole of a tire vulcanizing/molding mold which can improve exhaust efficiency and durability during tire vulcanization/molding, a tire molding mold, and a tire produced by using the tire molding mold. SOLUTION: The exhaust plug 3 comprises a cylinder 6 having a large diameter head part 4a in the upper part, a cylindrical exhaust hole 4b in the central part, and a through hole 5 communicating with the exhaust hole 4b in at least one place in the side; and a valve 8 which is inserted into the exhaust hole 4b of the cylinder 6 with a clearance 7 of a prescribed size (t) formed between them. In the clearance 7 formed between the cylinder 6 and the valve 8, between the through hole 5 formed in the cylinder 6 and the upper surface 6a of the cylinder 6, in at least one place in the longitudinal direction of the side of the valve 8, a gap part 9 with a size (T) larger than the size (t) of the gap is formed. COPYRIGHT: (C)2008,JPO&INPIT |
