Processing Machinery
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PA66 melt temperature too low
Fenómeno del problema
Producing with melt temperature set at 260℃, products have many cold slug marks and weak weld lines
Análisis de la causa
PA66 melting point is about 262℃; 260℃ melt plasticizes poorly with high viscosity, front cold material entrainment and weak weld line bonding; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solución
Raise melt temperature above 270℃; nozzle temperature raised synchronously; enlarge the cold slug well; thin-wall long-flow takes the temperature upper limit; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Settings below the melting point inevitably plasticize poorly, the temperature window lower limit must be held; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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