Injection drive mechanism for a servo injection molding machine
OwnerYing-Fu Changinventor
Life of this patent
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Abstract
A servo injection molding machine includes an injection screw, a ball screw, and a spline shaft that are mounted along the same axis. The spline shaft and the injection screw are connected by a connecting seat. An injection servomotor drives an injection sleeve mounted to a side of an injection seat, which, in turn, makes a ball nut drive a ball screw to move rectilinearly. A metering servomotor drives the spline shaft on a feeding seat to rotate in a direction that is same as or different from that of the injection servomotor or to rotate at a speed the same or not the same as that of the injection servomotor, thereby controlling the spline shaft to rotate on site or move rectilinearly for performing injection.
Claims9
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.
Dependencies are inferred from the claim text.