Electric injection apparatus

摘要

An electric injection apparatus having front and rear supports coupled by a tie bar and having a movable screw thrust member therebetween; a heating barrel attached to said front support; an injection screw for arrangement inside said barrel; an injection screw end rotatably coupled to a front center of said thrust member with said tie bar penetrating therethrough; a ball screw shaft nut portion for threaded coupling between said rear support and said thrust member; a hydraulic cylinder for back pressure control across said rear support thrust member in parallel with said ball screw shaft, said hydraulic cylinder including a cylinder for attachment to the rear support side and a piston rod for attachement to a screw thrust member side; means for driving said ball screw shaft; and means for driving said injection screw.