A drive device includes an output for an injection piston of an injection device to be acted upon to generate an injection force, a hydraulic drive mechanically connected to the output for the injection piston, and an electric drive. The electric drive is mechanically connected to the output for the injection piston via the hydraulic drive, so that the drive force generated by the electric drive can be transmitted together with the drive force generated by the hydraulic drive via the hydraulic drive to the output for actuating the injection piston. The electric drive is at least partially integrated into the hydraulic drive, and has an electric motor and a coupling device. The coupling device of the electric drive is arranged completely in a cylinder of the hydraulic drive.

An injection molding machine includes a screw to which a tag including identification information that is readable by a reading unit is attached, a drive unit that performs rotation and advancing and retreating of the screw, and a control device that controls the drive unit, the control device performs a control of moving of the tag to a reading position at which the identification information is read by the reading unit.