Processing Machinery
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Large barrel temperature fluctuation during processing of random copolymer polypropylene pipe special material random copolymer polypropylene pipe special material (Variant: strengthened measures)
Fenómeno do problema
The actual temperature of each section of the barrel deviates greatly from the set value, and the melt quality fluctuates.
Temperature fluctuation leads to unstable product dimensions, appearance, and mechanical properties.
In particular, extra attention is needed on the original basis, this problem is more prominent and needs key attention.
Análise das causas
（1）The heater band is aging, resulting in insufficient or uneven heating power
（2）The thermocouple is damaged or improperly installed, and the temperature measurement is inaccurate
（3）The PID parameters of the temperature controller are improperly set
（4）The cooling fan is faulty, causing the barrel to overheat
（5）The large ambient temperature change affects the temperature control accuracy
（6）On the original basis, extra attention is needed: process parameter fluctuations or equipment status changes have aggravated this problem
Solução
（1）Check and replace the aged heater bands to ensure uniform heating of each section
（2）Check the position and integrity of the thermocouples, and replace the damaged ones
（3）Optimize the PID parameters of the temperature controller, control accuracy ±2°C
（4）Ensure that the cooling fan works normally, and install air conditioning to maintain the ambient temperature if necessary
（5）Install an insulation cover to reduce heat loss
（6）And strengthen process monitoring; on the original basis, extra attention is needed, with special attention to parameter stability
Conclusão principal
Barrel temperature fluctuation is caused by heating or temperature control system faults, and the heater bands, thermocouples, and temperature controllers need to be regularly checked and maintained.
In different production scenarios, targeted preventive measures need to be taken.
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