Material Analysis
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Middle zone temperature fluctuation causes unstable melt viscosity
Problem Phenomenon
Middle zone temperature fluctuation causes unstable melt viscosity
Cause Analysis
Middle zone temperature too high, local degradation
Middle zone temperature low, insufficient plasticization
Unreasonable temperature difference setting between middle zone and front zone
Temperature control system responds slowly in the middle zone
Middle zone temperature setting affects melt uniformity
Solution
Reasonably set the middle zone temperature to the middle value of the 170-230°C range
Ensure the middle zone temperature is 10-15°C higher than the rear zone
Stabilize middle zone temperature control
Set the middle zone temperature according to the cellulose acetate butyrate melting curve
Calibrate the middle zone temperature control system
Key Takeaway
Middle zone temperature needs to ensure uniform melt plasticization
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