Processing Machinery
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PPO Barrel Zone Temperature Setting
Fenómeno del problema
【Problem Phenomenon】PPO barrel temperature settings jump greatly, plasticization is uneven and melt temperature is scattered
Análisis de la causa
SABIC general NORYL zones are: rear 250-270℃, middle 270-290℃, front 280-300℃, nozzle 280-300℃, hopper 60-80℃; progressive heating ensures plasticizing quality
Solución
Set zone temperatures progressively from low at the rear to high at the front; hopper 60-80℃ to prevent bridging; measure actual melt temperature to calibrate zone settings; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
PPO barrel progressive heating from 250 to 300℃, hopper 60-80℃ prevents bridging; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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