| 摘要 |
PROBLEM TO BE SOLVED: To realize a simple and precise molding and enable the productivity to be increased by using a plurality of molding space parts and auxiliary space parts which encircle the entire peripheries of molding space parts communicating with an injection hole as constituents for a production method and injecting a molten resin into the auxiliary space parts through the injection hole and then into each of the molding space parts. SOLUTION: The female die 1 and the male die 2 of a mold are lapped over each other in such a way that their reference faces 11, 21 come into contact with each other. In this state, a projecting part 23 is arranged in a recessed part 12, a projecting part 23d in a recessed part 12a and a projecting part 22 in a recessed part 13 respectively to form a molding space part 3 in each of the mated parts. In addition, auxiliary recessed parts 15, 16 are formed in a shallower level than the recessed parts 12, 13 around these parts 12, 13 and are used as auxiliary space parts 31. The auxiliary recessed parts 15, 16 cover the entire periphery of the upper/lower and right/left parts of the molding space part 3 and communicate with all the parts coming into contact with the molding space part 3. Further an injection hole 14 is allowed to communicate with the auxiliary space parts 31, and a resin injected through the injection hole 14 is introduced into the auxiliary space parts 31, through which the resin is, in turn, injected into the molding space part 3.
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