| 摘要 |
PROBLEM TO BE SOLVED: To provide a mold manufacturing method capable of avoiding a state that casting sand enters the gap between an original mold and a member for transferring an uneven pattern to a sand mold and capable of preventing the occurrence of the collapse or the like of the sand mold at the time of pulling-out of the original mold. SOLUTION: In manufacturing the mold for molding a foamed molded product comprising a thermoplastic resin, an uneven pattern molding member 40 is fixed to the whole or a part of the molding surface of the original mold 30 and the original mold 30 is used to manufacture the sand mold having the uneven pattern on its molding surface. Further, the sand mold is used to cast the mold having the uneven pattern on its molding surface. In this manufacturing method of the mold, the uneven pattern molding member 40 is constituted by superposing a porous sheet member having a large number of pores and a synthetic resin film 50 one upon another and the uneven pattern is formed to the synthetic resin film 50 by sucking the synthetic resin film 50 through the pore parts of the porous sheet member on the side of the original mold 30. COPYRIGHT: (C)2006,JPO&NCIPI |
