Injection molding machine with an electromotive spindle drive and a spring-based energy storage device for supporting the electric motor

An injection molding machine, comprising:

• at least one actuating drive constructed in the form of a spindle drive having an electric motor, said spindle drive moving between first end position and a second end position and having an equilibrium position distal from the end positions;
• and
• a dual energy storage device operatively connected with the spindle drive and receiving energy from the spindle drive in the first end position and transferring energy to the spindle drive in the second end position, said transferred energy boosting power of the electric motor,
• wherein the electric motor has a rotor and the spindle drive has a spindle nut connected to the rotor and a housing having a housing portion for support of the electric motor, and further comprising a variable force coupling mechanism operating in parallel with the dual energy storage device and disposed between one member of the group selected of the rotor and the spindle nut, and the housing portion.