| 摘要 |
<p>A method and system of injection molding a thermoplastic material in a sandwich mold (17), which operates with desynchronized infection periods and usually with desynchronized opening and closing periods. The method includes a process of depressurizing the runner system (43, 44) and for preventing molding of layered products when using the desynchronized infection cycle. The method utilizes a bifurcated channel system encompassed by the injection unit (14) and two or more runner systems (43, 44) encompassed by the sandwich mold. Also disclosed is an improved method of transferring thermoplastic material from an injection unit (14) to a sandwich mold when a transfer of a molding material along the central axis of the clamping platens is not suitable. The method utilizes one or more snorkels (30, 31) which have a central axis which is displaced from the central axis of the clamping platens (10, 11).</p> |
