| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold for vulcanization which can improve the exhaust efficiency of a vent hole while keeping superior durability. SOLUTION: By attachably/detachably embedding a vent piece 5 in which a plurality of inner pipes 8 closely contacted with each other are fitted into an outer pipe 6 in the vent hole 3 of the vulcanizing mold, exhaust through the ventilation passage V1 of each inner pipe 8 and exhaust through a ventilation passage V2 formed in the clearance between the inner pipes 8 are secured. Strength in the axial direction is high because the inner pipes 8 are used. Even when the total opening area of the inner pipes 8 in the cross section of the vent piece 5 is enlarged, deformation can hardly occurs practically, and superior durability can be obtained. COPYRIGHT: (C)2011,JPO&INPIT
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