Injection molding machine having coaxial injection motor and transmission shaft

Abstract

The injection molding machine comprises a cylinder member; an injection member disposed within the cylinder member such that the injection member can advance and retract; an injection motor (82); and a transmission shaft which is connected to the injection member such that the transmission shaft can rotate relative to the injection member. The transmission shaft has a rotation transmission portion, to which rotation of the injection motor (82) is transmitted, as well as a motion conversion portion for converting rotational motion to linear motion. The injection motor (82) and the transmission shaft are disposed on the same axis, and the transmission shaft is advanced and retracted inside the rotor (92) of the injection motor (82). Since the transmission shaft is advanced and retracted inside the rotor (92) of the injection motor (82), the injection molding machine can be reduced in axial length.

Dependencies are inferred from the claim text.