Since 1979, Producer has thrived for over 40 years. Although we are a traditional manufacturing company, we consistently pursue progress and innovation. As energy conservation becomes a global priority, we recommend servo motors as the primary power source for our zinc die casting machines. Aside from the crucible burner (or electric furnace), the hydraulic motor is the main consumer of energy in a zinc die casting machine. Mechanical actions—such as mold opening/closing, nozzle retraction, injection, and ejection—all depend on motor power. By utilizing servo motors, customers can achieve significant energy savings.

In our tests under stringent conditions (including repeated ejection, full-stroke injection, continuous operation, etc.), we measured the electricity consumption of a P75 model zinc die casting machine​ using a traditional 220V motor. With a main pressure setting of 105 kg/cm² and a cycle time of 9.2 seconds per shot, the machine consumed about 6.95 kWh per hour.

We then replaced the traditional motor with servo motors from two different manufacturers and conducted the same tests under identical conditions. The power consumption ranged between 5.5 to 5.7 kWh, which is approximately 79%~82% of the usage of traditional ones.

In real production environments, factors such as inspection, mold adjustments, spraying, cooling, and troubleshooting lead to lower overall machine activity, allowing servo motors to save even more energy. Field tests showed that on zinc die casting machines, power savings reached 26 ~ 27%, which is even better than in factory.

Traditional motors operate at a fixed speed once turned on, regardless of actual need. In contrast, servo motors only run when required, and their speed can drop to zero during idle periods. For example, in our 9.2 second test cycle, the servo motor only needed to run for 4 seconds to maintain pressure in the accumulator between 80 ~ 100 kg/cm². During the remaining 5.2 seconds, the motor was idle, consuming almost no energy. With larger zinc die casting machines​ that have longer cycle times, the idle period is even longer, leading to even more energy savings. In fact, real-world testing of our P130 zinc die casting machine​ showed that each cycle could reduce energy consumption by more than 30%!

You can refer to the chart below for a visual comparison of energy usage. The ‘orange shaded area’ represents the energy consumption of a traditional motor, while the ‘blue shaded area’ represents that of a servo motor. The longer the zinc die casting machine’s​ cycle time, the larger the difference, with the orange area significantly exceeding the blue one.

We recommend that clients transition to servo motors to replace traditional ones; this is an investment that truly pays for itself.