Electromotive adjustment drive for an injection unit

An injection molding apparatus having an electromotive adjustment drive, said electromotive adjustment drive comprising:

• an electric drive for operating a plasticizing screw, said drive having a single motor having a motor housing, a rotor having a first magnetic pole assembly, and a stator interacting with the rotor and having a second magnetic pole assembly, said rotor and said stator being received in the motor housing, said rotor being operatively connected to the plasticizing screw and constructed for movement relative to the motor housing along a travel path, wherein one of the first and second magnetic pole assemblies of the rotor and the stator is extended in relation to the other one of the first and second magnetic pole assemblies of the rotor and the stator by a portion corresponding to the travel path;
• a spindle drive operatively connected to the rotor and supported by the motor housing for implementing the movement of the rotor along the travel path;
• and
• a switching assembly constructed for selective operation of the electric drive as a rotary drive or as an injection drive.