(2) After the extruder adopts the servo control system, the motor and oil pump will be controlled by PLC to adjust the operation status of the motor and the required motor speed in real time according to the working state and extrusion speed requirements of the extruder, which truly reflects the power required by the host. Thus, the energy consumption is reduced, the service life of the oil pump is improved, the temperature of the hydraulic oil is reduced, the power factor of the power system is improved, and the control accuracy of the extrusion speed is improved. The extruder servo system can truly reflect the working power and power consumption of the extruder and achieve intelligent control. Compared with the old hydraulic control system, the power saving per ton of aluminum is 15% ~ 20%.(extruder)