Processing Machinery
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Polyolefin plastomer polyolefin plastomer processing barrel temperature fluctuation is large
Problem Phenomenon
The actual temperature of each section of the barrel deviates greatly from the set value, and the melt quality fluctuates.
Temperature fluctuation causes unstable product dimensions, appearance, and mechanical properties.
Cause Analysis
（1）Aging of the heating ring causes insufficient or uneven heating power
（2）The thermocouple is damaged or improperly installed, making temperature measurement inaccurate
（3）The PID parameters of the temperature control instrument are improperly set
（4）Cooling fan failure causes the barrel to overheat
（5）Large changes in ambient temperature affect temperature control accuracy
Solution
（1）Check and replace aging heating rings to ensure uniform heating of each section
（2）Check the position and integrity of the thermocouples and replace damaged ones
（3）Optimize the PID parameters of the temperature control instrument, with control accuracy of ±2°C
（4）Ensure the cooling fan works normally, and install air conditioning to maintain the ambient temperature when necessary
（5）Install insulation covers to reduce heat loss
Key Takeaway
Barrel temperature fluctuation is caused by heating or temperature control system failure, and the heating rings, thermocouples, and temperature control instruments need to be regularly inspected and maintained.
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