Processing Machinery
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HDPE barrel temperature zoning
Fenómeno del problema
HDPE plasticization is uneven with entrained unmelted particles
Análisis de la causa
The barrel temperature gradient is unreasonable, and melting in the compression section is insufficient; 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
Solución
Barrel gradient: rear section 180℃, middle section 210℃, front section 230℃; back pressure 0.3-0.8MPa; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
HDPE temperature gradient rises gently to ensure plasticization; 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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