| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of molding a synthetic resin made frame body having an opening part in the inner side which reduces a component of a mold and is simple and not troublesome in manufacturing. SOLUTION: In the method of molding the synthetic resin made frame body, a molten resin is flowed circumferentially from the central part, injected from an edge peripheral gate into a circumferential cavity, the gate communicating with the cavity is gate-cut in a molten state of the resin, and the synthetic resin made frame body is taken out. After the gate-cut is filled with the cavity, an annular projection part moving upward closes a fill port of the cavity. COPYRIGHT: (C)2011,JPO&INPIT |
