| 摘要 |
PURPOSE:To shorten the molding cycle and at the same time obtain a thick- walled molded part with little fear of the generation of sink mark and bubble by a method wherein some portion of a molding space is occupied by a substance excluding filling resin and, after that, the resin is poured in the remaining space. CONSTITUTION:A thin-walled molded part 1 is prepared and put between a pair of molds 3 and 4. Filling resin, which is the same resin as what the thin- walled molded part 1 is made of, is poured through a gate 5 so as to be filled in the remaining portion of a molding space 2 or in a pseudo thin-walled molding space. As a result, a thick-walled molded part 7 integrating the filling resin 6 with the thin-walled molded part 1 is obtained. In order to obtain an internally uniform and transparent thick-walled molded part, both the thin-walled molded part and the filling resin are preferably made of the resin of the same quality. In case other than that as just mentioned above, only thing to be indispensable is that the filling resin 6 surrounding the thin-walled molded part is the resin necessary (in color, kind and the like) no matter what resin excluding the above- mentioned resin (different in color and kind) may be employed to the thin-walled molded part 1. |
