Inverters – Energy saving solution for plastic injection machines

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Inverters – Energy saving solution for plastic injection machines

1. Make a problem

  • In modern society, plastic products have a very important role, plastic products are present everywhere in life. From electronics to household products to auto parts, all are made of plastic. All of the above products are produced by plastic injection machines.

Inverters - Energy saving solution for plastic injection machines.

  • Plastic injection machine consists of many parts such as feeding system, mold, screw, hydraulic system…

Inverters - Energy saving solution for plastic injection machines.

2. Power consumption

  • Hydraulic system: 70 – 80%
  • Heating system : 15-  20%
  • Cooling system: 5 – 10%
  • The stages of molding, gluing, holding pressure, and cooling need different oil flows. But fixed oil pump will provide fixed flow and pressure. At each stage, the overflow valve and the linear valve are responsible for regulating flow and pressure.
  • If the control system can automatically adjust the speed of the oil pump motor according to the actual load requirements in different phases, then the energy consumption will be optimized. Eliminate the phenomenon of overflowing through the safety valve and still ensure the correct and stable operation of the machine.

3. Solution

  • Use inverter to adjust oil pump motor speed.
  • Use Servo pump to regulate oil flow.
See more :
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3-1. Using an inverter

  • Using the inverter to adjust the rotation speed of the oil pump motor based on the current working state of the machine according to the pressure and speed signal from the controller (PLC). When high pressure and flow is required, the motor rotates at the highest speed, otherwise the motor can slow down at background speed. Saving rate is about 10 – 30%.

Inverters - Energy saving solution for plastic injection machines.Inverters - Energy saving solution for plastic injection machines.

3-2. Using servo pump

Inverters - Energy saving solution for plastic injection machines.

  • Replace old pump with variable flow servo pump controlled by servo driver. This is the method that provides optimal savings (up to 60%) thanks to the fast response and precise control of the servo.
  • Save electricity from 40% – 60% of the machine’s power consumption.
  • Reduce engine oil temperature (from 5 to 10 degrees) and reduce oil usage by up to 40%.
  • The oil pressure of the system is always stable.

4. Contact

Inverters – Energy saving solution for plastic injection machines

  • If you have a need to buy or quote automation equipment or need further advice, please contact us immediately for dedicated, fast and effective support!
  • TRI VIET AUTOMATION SOLUTION JOINT STOCK COMPANY
    Ho Chi Minh Address:  36/6 street 4, quarter 5, An Lac A ward, Binh Tan district, Ho Chi Minh city.
    Hanoi Address: 41/M2, Yen Hoa new urban area, Yen Hoa ward, Cau Giay district, Hanoi city
    Phone: 0984868617
    Email: trivietautomation.info@gmail.com
    MST: 0316876097
    Website: www.triviettech.com.vn – www.sineedrive.vn
    Working hours: Monday – Sunday / 7:30 AM – 5:00 PM