| 摘要 |
PURPOSE:To manufacture a vessel body for a case, etc. for a video and an audio cassette at a time by a pair of top and bottom forces by forming a surface side body and a back side body to an integral structure-shaped development plane shape through a joint wall section. CONSTITUTION:A molding surface (a) is formed by one surface side body molding surface section a1, the other back side molding surface section a2, and a joint wall section molding surface a4, which is positioned between both molding surfaces a1, a2 and communicated severally through connecting side molding sections a3, a3. The top and bottom forces A are united, a melted synthetic resin material is pressed into the molding surface (a), and solidified, the forces A are separated into upper and lower sections, and a black body B is injection-molded. A joint wall section B3 is erected to the surface side body B1 side from a connecting side B4 between the wall section B3 and the surface side body B1 after molding the blank body B to form one side wall b1, and a connecting side B4 between the wall section B3 and a back side body B2 is bent to the trough side, and both bodies B1, B2 are united, thus assembling a case. |
