Patent ID: 8075296

Claim:
An in-line screw injection molding machine in which a screw in a heating cylinder is rotated to move a raw resin toward a forward end of the screw while kneading and plasticizing the raw resin, accumulate the thus molten resin on the forward end side of the screw after measurement of the molten resin, and move the screw forward to thereby inject and fill the molten resin into a mold, wherein: an internally hollow built-in motor having a cylindrical stator and a cylindrical rotor located inside the stator is used as a metering electric motor, a sleeve is fixed to the inside of the rotor of the built-in motor, and a member to which a rear end portion of the screw is fixed is connected and fixed by a first bolt to the sleeve, while a nut body as a linear motion portion of a ball screw mechanism for converting rotation of an injecting electric motor into linear motion is connected and fixed with a second bolt to the sleeve.