| 摘要 |
PROBLEM TO BE SOLVED: To solve such defects that a hollow part can not suitably be taken out from a forming die or a wax pattern is deformed or broken, which causes the damages when the wax pattern is taken out even if the wax pattern is precisely molded, and that accordingly, the yield of an original pattern is worsened, which brings high cost in production, in the conventional manufacturing method of the hollow decorative parts for spectacles. SOLUTION: Split molds 10 for hollow decorative parts as master model, are manufactured and rubber molds (figure 4), are manufactured based on this split molds, and after manufacturing the split wax patterns 14 corresponding to the split molds for hollow decorative parts by the rubber molds, plural wax patterns are integrated (figure 5) to manufacture the hollow wax pattern 17 having the hollow shape for hollow decorative parts. The wax pattern tree 18 is manufactured by the hollow wax patterns, and after manufacturing a green sand mold by the wax pattern tree, this green sand is burnt to manufacture a mold, and molten metal is poured into the mold to form the hollow decorative parts 1, 2, 3, 4, and 5 for spectacle. When a metallic mold is used instead of the rubber mold, this mold can naturally be adopted.
|
