Processing Machinery
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HDPE melt temperature too low
Fenómeno do problema
The HDPE melt temperature was set to 190℃, and the product surface is rough with obvious flow marks
Análise das causas
When the temperature is too low, the melt viscosity is large, causing filling flow marks and rough surface; 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
Solução
Raise the melt temperature to 210-250℃; take the upper limit for thin walls and long flow paths; 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
Conclusão principal
The lower limit of HDPE temperature ensures flow and surface quality; 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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