How to control temperature by adjusting extruder screw speed?

How to control temperature by adjusting extruder screw speed?

Yongte is professional manufacturer for plastic extrusion machines in China, we have rich experience in plastic machine manufacturing and installation, we supply high quality machine and good customer service. Here are some ways to control temperature by adjusting extruder screw speed:

When increasing the screw speed:

Increased frictional heat: The faster rotation of the screw will lead to increased friction with the material, thereby generating more heat and possibly increasing the temperature.

Accelerate material transportation: The residence time of materials in the barrel is shortened, which may reduce heat accumulation and avoid excessive temperature rise to a certain extent.

When reducing screw speed:

Reduce friction heat: Correspondingly, the heat generated by friction will be reduced, helping to lower the temperature.

Extend the material residence time: The longer the material is heated, the temperature may rise slightly.

In actual operation, the following points need to be considered to accurately control the temperature:

• Closely monitor temperature changes: Know the temperature in real time with a temperature sensor installed on the extruder.
• Combined with other temperature adjustment methods: such as adjusting the power of the heating element, etc., it works synergistically with the screw speed adjustment.
• According to material characteristics: Different materials may respond differently to temperature changes caused by changes in screw speed.
• Consider product quality requirements: Ensure that the quality of the product still meets the standards after temperature adjustment.
• Conduct experiments and accumulate experience: Find the best matching relationship between screw speed and temperature suitable for specific production situations through multiple experiments.

For example, at the beginning of production, you can first set the screw speed at a moderate level and observe the temperature changes. If the temperature is too high, reduce the speed appropriately; if the temperature is too low and the heating power has reached the upper limit, you can increase the speed appropriately. Assisted heating. As production progresses and the process becomes familiar, the temperature can be controlled more accurately by adjusting the screw speed.