| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold structure for molding a cylindrical product with a bottom having a uniform wall by preventing inclining of a core even by using a long core or enhancing an injecting pressure of a molten resin and opening no hole at an original bottom. SOLUTION: In the case of molding a cylindrical resin product with a bottom, a molten resin is injected from a bottom side of the product through a gate, and a support pin is retracted from a rugged engaging part before the cavity is fully filled with the resin. Thus, the resin is filled even at a position where the pin is disposed in the cavity, and hence the product having a bottom including no through hole by the pin can be molded.
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