| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that, in the injection molding of an article having a fine core pin held by one mold in the cavity formed by molds, the core pin is vibrated, shaken or bent at the time of inflow and filling of a resin or the like and molding is performed in this state. SOLUTION: The fine core pin, which forms a fine insertion hole to the central part of the cavity formed to one of a fixed mold and a movable mold or formed so as to straddle both molds in coaxial relation to the center axis of a molded product, is projected from one mold to the other mold and held to one mold by a bearing so as to be freely rotated around the center axis. The rotary device to be connected to the core pin is integrally provided in one mold.
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