RESIN MULTILAYER INJECTING-MOLDING METHOD

摘要

While a second-layer resin is being injected, a movable platen is retracted to a predetermined movable platen position (S1) to enlarge the capacity of a secondary cavity. Immediately after the completion of the charge of the resin, a toggle mechanism is driven to reduce the capacity of the secondary cavity to a predetermined movable platen position (S2). After the lapse of a predetermined time, the toggle mechanism is driven again to enlarge the capacity of the secondary cavity to a predetermined movable platen position (S3). Thus, it is possible to produce such a multilayer injection molding of a high quality stably as has little dispersion in the thickness, size and mass and as has neither deformation nor warpage.