Great potential for energy savings, even with short cycle times

Project Name Hot chamber die casting machine
Industry Plastic Machinery and Die Casting
Technologies Hydraulics
4EE Levers Energy System Design, Efficient Components, Energy on Demand

Increasing energy efficiency in die casting machines

Initial Situation

Die casting machines require high forces in a rough production environment. With a relatively short cycle of only 7.5 seconds and negligible auxiliary process times, the previous concept was based on two uncontrolled pumps for high and low pressure.

The Rexroth 4EE Solution

The manufacturer of a die casting machine with a clamping force of 50 tons opted for a Sytronix SvP 7000 variable speed pump drive when the machine series was updated. It consists of a synchronous servo motor, an intelligent servo drive, an internal gear pump, as well as all necessary software functions.

The result

By using Sytronix, energy consumption was reduced by around 84 percent from 11 kW to only 1.7 kW at identical cycle times. At the same time, the manufacturer was able to significantly decrease the number of components needed for the hydraulic system.


- Energy consumption: 79,200 kWh/a

After Rexroth 4EE

- Energy consumption: 12,240 kWh/a

- Savings: 66,960 kWh/a


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