Patent ID: 6368095
Filing Date: 2002-04-09
Classification: B29C

Abstract:
An injection drive mechanism for a servo injection molding machine, comprising:a base having an injection seat and a feeding seat mounted thereon, the injection seat having a first side and a second side, the base further including a top side with a feeding inlet; a barrel mounted to the first side of the injection seat; an injection screw rotatably extending through the barrel, the feeding inlet being adapted to allow feeding of plastic material to the injection screw; a ball screw mounted to the second side of the injection seat, the ball screw including a first end that is connected with the injection screw and a second end, the ball screw including an axis that is coincident with that of the injection screw; a spline shaft rotatably supported by the feeding seat, the spline shaft including an end connected to the second end of the ball screw, the spline shaft having an axis coincident with that of the ball screw; an injection servomotor for driving the ball screw; and a metering servomotor for driving the spline shaft.