Apparatus for generating surface pressure in an injection molding machine

A pressure-generating apparatus comprising a stationary carrier plate, and a clamping plate traveling in relation thereto and capable of being fixed in working position, said clamping plate comprising on its side opposite towards the carrier plate an electromechanically disengageable closure plate, wherein material to be pressed or tools to be clamped are arranged between the closure plate and the carrier plate, further wherein a plurality of piezoelectric actuators are arranged between the closure plate and the clamping plate, and the closure plate is capable of being fixed in at least one piezo displacement intermediate position from which intermediate position the clamping plate can be guided and subsequently fixed with the closure plate being disengaged by an additional piezo displacement.