In the plastic processing industry, granulation lines, pipe extrusion lines, and pulverizers serve as core production equipment, operating under high load for extended periods. High electricity costs have become a key factor restricting the profit growth of enterprises. How to achieve a significant 15%-35% energy saving while ensuring production efficiency and product quality? Today, the application of water cooled servo motors provides a perfect solution. This “energy-saving trick” not only maintains the stable operation of the equipment’s water cooling system but also boasts multiple advantages such as an exquisite appearance, high protection level, low motor operating temperature, and full release of energy efficiency, opening up a new path for plastic processing enterprises to build energy-saving production lines.

The energy-saving effect of water cooled servo motors stems from the synergy of “stable heat dissipation + intelligent energy control + high protection”: the stable water circulation system breaks the limitation of traditional motors relying on environmental heat dissipation, keeping the motor in an efficient operating state at all times; the precise energy control of the servo system realizes “on-demand output”, reducing energy waste from the source; the IP65+ protection level is suitable for the complex environment of plastic workshops with high dust and high moisture, effectively extending the service life of the equipment. For enterprises, the investment payback period of this solution is only 1-2 years, which can not only respond to the national “dual carbon” policy but also effectively reduce operating costs, achieving a win-win situation of economic and social benefits.

For granulation lines, traditional motors need to continuously maintain high-power output during the material melting and extrusion granulation process to ensure stable extrusion pressure and speed. However, if a large amount of heat generated during operation cannot be dissipated in a timely manner, the motor temperature will rise rapidly. When the temperature exceeds 80°C, the motor efficiency will decrease by 10%-15%, and it may even cause faults such as magnet demagnetization and coil aging, which not only increases energy consumption but also shortens the service life of the equipment. After replacing with a water cooled servo motor, the closed-loop water circulation system can accurately control the temperature of the cooling medium, unaffected by changes in workshop dust, temperature, and humidity, and stably control the motor temperature within the efficient range of 45-60°C. At the same time, the servo system can dynamically adjust the output power according to the material viscosity and granulation specifications: when processing low-viscosity materials, it automatically reduces the speed to avoid “idle energy consumption”; when switching to high-specification granulation requirements, it quickly increases the torque to ensure that the production capacity is not affected. According to the actual application data of a large-scale plastic granulation enterprise, a granulation line equipped with water cooled servo motors saves more than 32,000 yuan in electricity bills per month, with an energy consumption reduction of 23%-31%.

Pipe extrusion lines have higher requirements for equipment stability and protection performance. During the pipe extrusion process, the motor needs to drive the screw to continuously convey materials, and frequent switching of pipe diameter and wall thickness specifications will cause fluctuations in motor load. Traditional air-cooled motors often have problems of uneven heat dissipation and fluctuating temperatures, which affect production stability; in addition, there are problems of cooling water splashing and plastic dust accumulation in the pipe workshop. Traditional motors with a protection level of only IP54 are prone to failure and shutdown due to water and dust ingress. Through a special sealing design, the water cooled servo motor directly increases its protection level to IP65 and above, which can not only completely block the intrusion of dust but also work normally even in case of short-term water splashing, completely solving the problem of damage to the motor caused by the complex environment of the workshop. In addition, its speed response speed is 35% faster than that of traditional motors. When switching pipe specifications, it can quickly match the screw speed, reducing the waste of transition materials; the low-temperature operation also reduces the motor power loss by more than 28%. After introducing this equipment, a pipe production enterprise not only achieved the energy-saving target of 21%-35% but also increased the pipe qualification rate by 8.5%, significantly reducing production costs.

With the continuous deepening of the concept of green production in the plastic industry, water cooled servo motors are gradually becoming the preferred solution for energy-saving transformation of granulation lines, pipe extrusion lines, and pulverizers. In the future, with the continuous optimization of water cooling technology and servo systems, their energy-saving potential will be further released, providing stronger support for the plastic processing industry to achieve the goals of “cost reduction, efficiency improvement, and green development”.

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