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, the hydraulic system including:

• a hydraulic drive unit for cyclically driving a component of the shaping machine at a start time;
• a pump;
• a hydraulic accumulator to be discharged for driving the hydraulic drive unit and to be charged up by operation of the pump;
• and
• an open-loop or closed-loop control unit for open-loop or closed-loop control of the pump, wherein the open-loop or closed-loop control unit is adapted to operate the pump continuously until the start time of the hydraulic drive unit to charge up the hydraulic accumulator until the start time of the hydraulic drive unit,
• wherein the open-loop or closed-loop control unit is configured to calculate, based on a hydraulic pressure of the hydraulic system and/or a delivery volume ascertained during a preceding cycle of the shaping machine, an average delivery output of the pump, and to provide for open-loop or closed-loop control of the pump with regard to the average delivery output.

A hydraulic system for a cyclically operating shaping machine, the hydraulic system including:

• a hydraulic drive unit for cyclically driving a component of the shaping machine at a start time;
• a pump;
• a hydraulic accumulator to be discharged for driving the hydraulic drive unit and to be charged up by operation of the pump;
• and
• an open-loop or closed-loop control unit for open-loop or closed-loop control of the pump, wherein the open-loop or closed-loop control unit is adapted to operate the pump continuously until the start time of the hydraulic drive unit to charge up the hydraulic accumulator until the start time of the hydraulic drive unit,
• wherein the open-loop or closed-loop control unit is configured to calculate, based on a hydraulic pressure of the hydraulic system and/or a delivery volume ascertained during a preceding cycle of the shaping machine, a hydraulic pressure and/or delivery volume required at the start time of the at least one hydraulic drive unit and to charge the hydraulic accumulator with the required delivery volume and/or hydraulic pressure by the pump.