Patent ID: 6716387
Filing Date: 2004-04-06
Classification: B29C

Abstract:
A process for injection molding of fluid filled plastic bodies in an apparatus having a mold cavity and a separate fluid reservoir, the process comprising the steps of:connecting a source of flowable plastic material fluidly to the mold cavity with a supply passage; positioning at least one fluid injection pin partially within the mold cavity, the fluid injection pin being connectable to a fluid source; injecting a quantity of flowable plastic into an interior of the mold cavity through the supply passage; cooling part of the plastic melt along walls of the mold cavity, thereby providing an interior of flowable, plastic melt; injecting a quantity of fluid from the fluid source into the interior of flowable, plastic melt; selectively expelling at least a portion of the interior of flowable, plastic melt into the supply passage; and selectively expelling at least a portion of fluent plastic from the supply passage into the reservoir.