The widespread application and development of servo internal gear oil pumps in hydraulic machinery such as injection molding machines and hydraulic presses

The application and development characteristics of the Pushi servo gear oil pump under Wuliangye and the German Ekler servo oil pump sold by Shanghai Zhouding Electromechanical Equipment Co., Ltd. in hydraulic machinery such as injection molding machines:

Super energy-saving: Compared to hydraulic systems using quantitative pumps, the energy-saving effect is 50-80%. High stability: Due to the use of a pressure and flow closed-loop system, the system stability is significantly improved. In general, the weight repeatability accuracy of the product can be controlled at 0.3%. After customers use the servo system, the product qualification rate is higher. The phenomenon of adjusting machine parameters for each shift no longer exists, and technicians can free up time to study more innovation, efficiency, and other aspects.


High precision: Due to the extremely small moment of inertia of the servo motor, the system response speed is extremely fast, reaching up to 50ms, making it easier to meet the requirements of injection molding processes that require precise adjustment. Low noise: Compared to the quantitative pump system, the servo system significantly reduces noise, making the working environment more environmentally friendly.


Low oil temperature: Due to the significant reduction in heat generated by the system itself, even without the need for cooling water, the oil temperature can be maintained at a lower temperature, significantly extending the service life of hydraulic oil and hydraulic components. Low investment, high return: In general, equipment investment can be recovered within 6-12 months (depending on product technology and regional electricity prices). Super energy-saving: Compared with traditional quantitative and variable displacement pump systems, the servo oil pump control system combines the fast and stepless speed regulation characteristics of servo motors and the autonomous oil pressure regulation characteristics of hydraulic oil pumps, bringing huge energy-saving potential. Compared with quantitative pumps, it saves 45% -80% of energy


High stability:

1. Position repeatability accuracy: The fast response speed ensures the accuracy of opening and closing the mold, and the precision of the injection endpoint position can reach 0.1mm. When combined with precision molds, it can achieve an injection molding accuracy of 0.3%.

2. Pressure control accuracy: The high-precision and high response PID algorithm module makes the system pressure very stable, with pressure fluctuations below ± 0.5 bar. Compared with traditional hydraulic presses, it exhibits stronger injection stability and significantly improves the qualification rate of molded products. High precision: Due to the extremely small moment of inertia of the servo motor, the system response speed is extremely fast, reaching up to 50ms, making it easier to meet the requirements of injection molding processes that require precise adjustment. Low noise: The servo energy-saving injection molding machine equipped with a low-noise screw pump, under the control of an excellent PID algorithm module, has a significantly lower noise level than ordinary injection molding machines, achieving silent operation and improving the working environment. Low oil temperature: Due to the significant reduction in heat generated by the system itself, even without the need for cooling water, the oil temperature can be maintained at a lower temperature, significantly extending the service life of hydraulic oil and hydraulic components. Low investment, high return: In general, equipment investment can be recovered within 6-12 months (depending on product technology and regional electricity prices).


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