| 摘要 |
PROBLEM TO BE SOLVED: To manufacture an injection-molded article with which a sheet-like material such as a decorative sheet is integrated, without producing deformation or breakage in the sheet-like material. SOLUTION: When the molten resin (25) reaches the end face (17a) of the mold cavity (19a), it smoothly passes the edge (A) of the mold cavity (19a) without staying near the end face (17a) and enters the groove part (17b). When the injected molten resin (25) is cooled, because the volume of the groove part (17b) is smaller than that of the mold cavity (19a), the temperature of the molten resin (25) in the groove part (17b) drops faster than that in the mold cavity (19a). This increases the viscosities of the molten resin (25) in the groove part (17b) and near the edge (A) of the mold cavity (19a) to prevent the damage of the sheet-like material (9) near the edge (A). COPYRIGHT: (C)2007,JPO&INPIT |
