Hydraulic system for a cyclically working molding machine and method for operation of such a hydraulic system

A hydraulic system for a cyclically operating shaping machine including:

• at least one hydraulic drive unit, in particular a piston-cylinder unit, for cyclically driving a component of the shaping machine at a start time,
• at least one pump,
• at least one hydraulic accumulator which can be discharged for driving the at least one hydraulic drive unit and which can be charged up by operation of the at least one pump,
• wherein there is provided an open-loop or closed-loop control unit for open-loop or closed-loop control of the at least one pump, wherein the open-loop or closed-loop control unit is adapted to operate the at least one pump continuously until the start time of the at least one hydraulic drive unit to charge up the at least one hydraulic accumulator until the start time of the hydraulic drive unit.