Processing Machinery
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HDPE screw selection
Problem Phenomenon
HDPE plasticization is poor and energy consumption is high
Cause Analysis
The screw compression ratio does not match the melting characteristics of HDPE; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Select a screw with a compression ratio of 2.5-3.0 for HDPE; length-to-diameter ratio above 25; replace worn screws; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
HDPE screws should be selected to match the melting characteristics; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar future problems
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