Patent ID: 6755641
Filing Date: 2004-06-29
Classification: B29C

Abstract:
Injection molding apparatus comprising:a first array of injection nozzles, each nozzle having a melt channel and a valve pin movable within the melt channel to open and close a mold gate; a second array of injection nozzles, each nozzle having a melt channel and a valve pin movable within the melt channel to open and close a mold gate; a melt distribution manifold between said first and second arrays of injection nozzles and in fluid communication with the arrays of nozzles; a first actuating assembly for displacing the valve pins of the first array of injection nozzles, comprising at least one actuator and a common linkage element driven by the actuator and linked to all of the valve pins of the first array of injection nozzles to move the valve pins in unison; and a second actuating assembly for displacing the valve pins of the second array of injection nozzles, comprising at least one actuator and a common linkage element driven by the actuator and linked to all of the valve pins of the second array of injection nozzles to move the valve pins in unison; wherein the first actuating mechanism and the second actuating mechanism are operable independently.