Patent ID: 7862329
Filing Date: 2011-01-04
Classification: B29C

Abstract:
1. A valve gated injection molding assembly comprising: first and second plates in face to face juxtaposition with a front face of said second plate facing said first plate and defining a manifold cavity therebetween for receiving a melt manifold; a nozzle extending through said first plate having a base for contacting said manifold and a tip opposite said base, said nozzle having a passage extending therethrough between said base and said tip; a valve pin slidably mounted in said passage, said valve pin having a tip end extending through said nozzle tip to open and close a melt passage through a gate registering with said nozzle tip, said valve pin further having an actuator end opposite said tip end; a valve pin guide bushing extending from said base of said nozzle for receiving and guiding said valve pin for movement along said passage, said valve pin guide bushing removably engaging said base of said nozzle for removal in a direction away from said base toward said second plate; a valve pin actuator mounted to said second plate and connected to said actuator end of said valve pin for moving said valve pin along said passage for said opening and closing of said melt outlet; said second plate having an actuator access port for removal of said valve pin actuator from a rear face of said second plate opposite said front face; said second plate further having a bushing access port for removal of said bushing therethrough absent said actuator, such that said bushing is removable without separating said first plate from said second plate.