| 摘要 |
PURPOSE:To facilitate the formation of an electromagnetic shield having a metal film satisfactorily put tight on the inner surface of a plastic molding by a method wherein a metal film is formed on the core surface of an injection molding die by spraying and then, resin is injection molded on the metal film using the injection molding die. CONSTITUTION:After the core 2 is separated from a cavity 3, metal is sprayed on the surface facing the hollow 4 of the core 2 with a sprayer 6 to form a metal film 7. Then, the core 2 forming the metal film 7 is combined with the cavity 3 to clamp the die and a melted resin 8 is injected into the hollow 4 with an injection molding machine and then, cooled to solidify. The resin 8 therein usable is an injection moldable thermoplastic resin. When the resin 8 in the die 1 is solidified by cooling and with-drawn from the die, an electromagnetic wave shield box body 9 having the metal film 7 joined on the inner surface of the resin 8 is obtained. |
