| 摘要 |
PURPOSE:To constitute the title method so that a facial part presents excellent conductivity, by a method wherein a part of an injection mold facing the facial part, which is to expose a conductive filler during molding, is held at a high- temperature state as compared with the other part. CONSTITUTION:When resin heated and fluidized by a heating cylinder is injected through a nozzle 11, the injected resin is led into a cavity 6 by passing through a sprue 2, runner 4 and gate 5 in succession, cooled, solidified and becomes a molded product thereupon, in an injection mold. Thereupon, since a core 8 is formed of a material whose thermal conductivity is comparatively high, the facial part 9 of the molded product coming into contact with a shaping surface of the core 8 is hard to be cooled suddenly at the time of cooling and solidification and therefore, it is seldom that the surface of the conductive filler is coated with the resin. |
