Injection Molding
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LLDPE nozzle temperature
Problem Phenomenon
Nozzle drool in LLDPE '2079851475616104452
Cause Analysis
Drool occurs when melt viscosity is low; when troubleshooting on site, verify item by item according to this mechanism to 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
Match nozzle temperature; suck-back; valve gate nozzle; 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
Drool relies on suck-back and structural anti-drool; after confirming effectiveness, fix 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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