| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold member which can form a bubble-free molding at a low pressure, a press molding mold, and the bubble-free molding. SOLUTION: The side member 4 of the press molding mold 1 has a lower surface 40B and an upper surface 40A which are approximately parallel to each other and is penetrated by an opening (cavity 2) whose shape is symmetrical in relation to the axis L1 approximately vertical to the lower and upper surfaces 40B and 40A. The inside side circumferential surface 6 of the opening has the first cylindrical side circumferential surface 6A centering on the axis L1, the second cylindrical side circumferential surface 6B centering on the axis L1 whose radius is larger than that of the first side circumferential surface 6A, and the third cylindrical side circumferential surface 6C centering on the axis L1 whose radius is larger than that of the second side circumferential surface 6B in turn from a first plane side and also has planes approximately perpendicular to the axis L1 between the first side circumferential surface 6A and the second side circumferential surface 6B and between the second side circumferential surface 6B and the third side circumferential surface 6C, respectively. COPYRIGHT: (C)2008,JPO&INPIT |
