| 摘要 |
PROBLEM TO BE SOLVED: To restrain the generation of warp of a molded form effectively even when the resin molded form of a complicated configuration is molded through injection molding. SOLUTION: Molten resin is injected into the cavity 1 of a molding tool 2 consisting of split molds and, thereafter, minute mold opening of the molding tool 2 is effected during the injection of pressure gas into the molten resin fed in the cavity. The resin pressure in the cavity 1 is reduced by the minute mold opening and, therefore, sufficient amount of pressure gas can be injected into the molten resin and the generation of warp of the molded form and the like can be restrained effectively. |
