Processing Machinery
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PC screw rotation speed and back pressure
Problem Phenomenon
【Problem Phenomenon】PC screw runs at high speed and high back pressure, plasticization shear is excessive causing degradation
Cause Analysis
PC screw rotation speed should be medium-low, back pressure 5-15MPa; high rotation speed and high back pressure shear heat degrades PC; plasticization relies mainly on external heat；During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
Screw at medium-low speed; back pressure 5-15MPa; if plasticization is insufficient, raise external heat instead of adding shear；After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability；Change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
PC screw at medium-low speed and low back pressure, external heat as the main and shear as the auxiliary；After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence；Include this case in the defect archive as a reference for troubleshooting similar problems in the future
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