| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection molding technique capable of finishing the design surface (surface) of a resin molded product so as to have an intended shape and capable of shortening the molding cycle of the resin molded product. SOLUTION: This injection molding method comprises a filling process for filling the cavity, which is ensured by closing a mold for molding the design surface of the resin molded product and a mold for molding the back of the resin molded product, with a molten resin, an injection process for injecting a cooled pressurizing fluid in the gap between the mold for molding the back of the resin molded product and the molten resin charged in the cavity, and a process for opening the molds to eject the resin molded product. The injection process is executed during the period on and after the start timing of the filling process and before mold opening timing. COPYRIGHT: (C)2007,JPO&INPIT
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