Processing Machinery
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HDPE nozzle temperature
Problem Phenomenon
HDPE nozzle drooling and cold material appear alternately
Cause Analysis
The nozzle temperature window does not match the melt temperature; 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
The nozzle temperature is consistent with the melt temperature; suck back; the nozzle aperture is appropriate; 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
Nozzle temperature matching the melt temperature plus suck back prevents drooling; 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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