With continuous upgrading of blown film equipment manufacturing technology, manufacturers keep optimizing production processes to deliver higher-quality film products. Energy saving has become an essential optimization direction for modern blown film machines, and its energy-saving transformation mainly covers two core modules: power drive system and heating system.
1. Energy-saving Transformation for Power Components
Frequency converters are the mainstream energy-saving solution for the power section. Its working principle is to recycle the redundant power consumption of the driving motor. For instance, the rated operating frequency of the motor is 50Hz, while actual production only requires 30Hz to meet processing demands. Without frequency conversion control, the extra power output will be completely wasted. The frequency converter adjusts motor output frequency according to real-time production load to cut invalid power loss.
2. Energy-saving Transformation for Heating Components
Electromagnetic heaters are widely adopted for heating energy-saving reconstruction. Compared with traditional resistance coil heating, they can achieve an energy-saving rate of 30%~70%, with prominent advantages shown as below:
An extra thermal insulation layer is equipped, greatly boosting thermal energy utilization efficiency;
Heat directly acts on the material barrel, minimizing intermediate heat transfer links and heat loss;
Heating speed rises by over 25%, shortening preheating waiting time;
Faster heating response improves overall production efficiency and maintains the motor in stable saturated operation state, avoiding energy waste caused by high power supply yet low actual load demand.
The above structural and performance advantages fully explain why electromagnetic heating technology can realize remarkable energy saving of 30% to 70% on blown film machines including three-layer co-extrusion models.
