Patent ID: 7086852

Claim:
A stack injection molding apparatus comprising: an injection manifold having a melt inlet, a plurality of first melt outlets and a plurality of second melt outlets; a first plurality of hot runner nozzles in communication with said first plurality of melt outlets facing a first plurality of mold cavities, wherein said first plurality of mold cavities are located on a first mold plate, wherein at least one of said first plurality of hot runner nozzles includes a plurality of valve pins movable within the hot runner nozzle; a second plurality of hot runner nozzles in communication with said second plurality of melt outlets facing a second plurality of mold cavities, wherein said second plurality of mold cavities are located on a second, movable mold plate, wherein at least one of said second plurality of hot runner nozzles includes a plurality of valve pins within the hot runner nozzle; a first actuator connected to the plurality of valve pins movable in said at least one nozzle of said first plurality of hot runner nozzles; and a second actuator connected to the plurality of valve pins movable in said at least one nozzle of said second plurality of hot runner nozzles, wherein the injection manifold is located between said first and said second actuators.