| 摘要 |
PROBLEM TO BE SOLVED: To obtain a rubber vulcanizing mold capable of avoiding the generation of burr without requiring shrink fitting or post-processing. SOLUTION: On the basis of conception, such that the gap between the fitting surfaces of a core mold and a core insertion hole is closed in a stable state by a penetrated rubber composition, different from conventional conception not generating the above mentioned gap, an annular groove communicating with a vulcanizing molding surface is formed to the fitting surface of the core mold insertion hole with the core mold through the fitting gap between the core mold insertion hole and the core mold.
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