| 摘要 |
PROBLEM TO BE SOLVED: To mold a roof prism with a high degree of accuracy even in the use of a mirror surface die which is divided into two pieces by a roof ridge line. SOLUTION: This mold is equipped with: first and second mirror surface dies 3 and 4 which have mirror surface parts for molding a roof surface and which are split from each other by a ridge line part 32a where the two roof surfaces cross each other; a first template 1 which has a face part abutting on a side surface of the first mirror surface die 3, and a first slope 7 formed away from a side surface of the second mirror surface die by a predetermined distance; a second template 2 which abuts on the first template; and a tapered die 5 which has a second slope 5a facing the first inclined face 7, which is arranged between the side surface of the second mirror surface die and the first slope, and which protrudes from a parting surface 12 by a predetermined amount b. The tapered die is pushed into the side of the first template by a force for mold-clamping the first and second templates, and the action of the first and second slopes makes the first and second mirror surface dies fastened by the tapered die. COPYRIGHT: (C)2005,JPO&NCIPI
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