Die-casting machine with energy saving evaluation

A method for evaluating energy savings of a die-casting machine with an electric motor and an inverter compared to a chosen die-casting machine model having a predefined electric motor without inverter when performing a particular processing operation, the method comprising:

• receiving selection of the chosen die-casting machine model having the predefined electric motor without inverter;
• receiving a pump delivery pressure over a time interval detected by a delivery pressure sensor;
• receiving energy consumption of the electric motor of the die-casting machine operatively connected to the inverter of the die-casting machine during the time interval detected by a consumption detection device;
• obtaining an absorbed power of the predefined electric motor without inverter corresponding to the chosen die-casting machine model from a storage device;
• and
• calculating an estimated energy consumption over the time interval from the pump delivery pressure and the absorbed power of the chosen die-casting machine model having the predefined electric motor without inverter by a processing device operatively connected to the storage device;
• and
• comparing energy consumption of the die-casting machine with the inverter with the estimated energy consumption of the chosen die-casting machine model having the predefined electric motor without inverter for a processing cycle to obtain a difference in energy consumption;
• if the difference in energy consumption is below a target value, determining that the die-casting machine does not need the inverter or
• if the difference in energy consumption is above the target value, determining that the die-casting machine is beneficial with inverter.