①Employ a circular air flow design through segmented control of individual fan to provide closed-loop temperature control. A short-circuit prevention design is also added to achieve a dynamic temperature control within a deviation range of ±1℃.
② Separately controlled fan power supply driven by dedicated program (The fan stops the program with a 30 minutes time delay after turning off the heater or pressing of the emergency stop button) to ensure that the melt will not be decomposed or carbonized due to barrel overheat caused by machine pause or shutdown and result in problems such as black spots in products or tough carbon deposit on screw surface.