| 摘要 |
PURPOSE: A method and an apparatus for designing molds, extruder dies and cores are provided to not require trial manufacture. CONSTITUTION: The designing method comprises the following processes: extruding molten resin through the gap between the extruder die and core to form a parison(P1), clamping the mold around the extruded parison(P2), blowing compressed air into the parison(P3), cooling the molten resin in the mold to solidify it(P4), and opening the mold and removing the molded product thereby obtained(P5). In the present invention, because the molded product is removed from the mold in a high-temperature state, it undergoes thermal deformation due to cooling.
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