Patent ID: 7955068

Claim:
An injection molding machine comprising: a cylinder; a frame supporting the cylinder; a screw provided in the cylinder; a screw advancing and retracting mechanism advancing and retracting the screw axially in the cylinder; and a screw rotation mechanism rotating the screw around a shaft in the cylinder, wherein the frame comprises: a front wall to which the cylinder is attached; a rear wall to which the screw advancing and retracting mechanism is attached; and a side member provided on each of laterally opposite sides of the front wall and the rear wall to connect the front wall and rear wall together, and the screw rotation mechanism includes: a driving electric motor; and transmission means for transmitting rotation of the driving electric motor to the screw, and a guide member is provided on each of the side members, the screw advancing and retracting mechanism slidably reciprocates the screw rotation mechanism on the guide members, and the screw reciprocates in the cylinder.