| 摘要 |
PURPOSE: To provide an improved molding method for producing a molded product by either one of extrusion blow molding, thermoforming and injection molding. CONSTITUTION: The surface of a mold cavity is always duplicated in this method. Further, in this method, the surface of the mold cavity is heated to temp. lower than the softening temp. of a thermoplastic resin and the surface of the mold cavity and thermoplastic resin are brought to a contact state while air between them is vented and the surface of the mold cavity is heated to peak temp. exceeding the softening temp. of the thermoplastic resin and subsequently cooled to temp. lower than the softening temp. of the thermoplastic resin from the peak temp. and cooling is continued until a molded product has rigidity sufficient to take the product out of a mold and, thereafter, the molded product is taken out of the mold. |
