Processing Machinery
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PVC Screw Temperature
Problem Phenomenon
After PVC screw wear, product degradation points increase
Cause Analysis
Worn screw clearance backflow makes material residence time uneven, local overheating degradation; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Screw wear regularly detected; replace when wear exceeds standard; select PVC-dedicated low-shear screw; after adjustment, continuously sample 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
Screw condition is part of PVC residence control; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
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