| 摘要 |
PROBLEM TO BE SOLVED: To adjust a gross value of the drawn area of a resin part molded by a resin mold to a proper value by giving blast treatment to the drawing- molded part of the resin mold by the projection of a sand material, and then giving the blast treatment by the beads shot projection. SOLUTION: In manufacturing a resin mold, a resin product model is manufactured by utilizing a mold (die and the like) of an existing resin component, then one of mold models is manufactured on the basis of the product model, and one of resin molds 10 is manufactured on the basis of this mold model. Continuously, the other mold model is manufactured by using the obtained resin mold 10 and the product model, and the other resin mold is manufactured on the basis of the other mold model. Finally, the finishing work is executed onto each resin mold to complete the resin mold. On this occasion, the blast treatment is given by the projection of a sand material onto a surface of the drawing-molded part 13a formed on the resin mold 10, and then the gross is adjusted by the blast treatment by the beads shot projection.
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