| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection-molding method which can easily expand the inside of a thicker part 18 to a degree wherein the generation of sink marks at the thicker part 18 can be sufficiently suppressed while surely suppressing the expansion of a thinner part when an uneven molded article having the thinner part and the thicker part 18 is molded. SOLUTION: A die having a first die cavity 2 corresponding to the uneven molded article, and a second die cavity 3 which is connected with the first die cavity 2 is used, and an expandable molten resin in which carbon dioxide is dissolved is injected into the first die cavity 2 being pressurized with a gas. Then, one part of the molten resin is discharged into the second die cavity 3, and thus, only the thicker part 18 of the uneven molded article which is molded by the first die cavity 2 is expanded by this foaming injection-molding method for the uneven molded article. COPYRIGHT: (C)2004,JPO |
