Processing Machinery
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POM shutdown purging
Fenómeno del problema
Starting up after half an hour of shutdown, the products show yellow spots and an irritating odor
Análisis de la causa
POM melt residing at 200°C for more than 10-15 minutes begins to degrade, and the decomposition products contaminate subsequent products; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
For shutdowns exceeding 10 minutes, empty the barrel or cool it to 150°C; when restarting, discharge material until normal; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
The POM residence red line is counted in minutes, and shutdown must be followed by purging; 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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