Spritzgiessenanlage zum Verkürzen der Formgebungstaktzeit

摘要

An arrangement for molding a front or back polystyrene mold half which is used, with a second complementary back or front mold half, for subsequent molding of a soft contact lens such as a hydrogel soft contact lens. Each mold cavity has a first insert (70) on the optical quality side of the mold cavity and a second insert (80) on the second side. Each of the first and second inserts has a circumferential cooling passageway (76,84) defined therearound or in proximity for the first inserts, and also includes a bubbler (76,86) positioned internally therein. Coolant is circulated in a turbulent mode through the circumferential passageways and also through the bubblers against inner surfaces of the insert to provide rapid cooling of the mold cavity.