Material Drying
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PC drying temperature 120℃ upper limit
Fenómeno do problema
【Problem Phenomenon】Raising drying temperature for speed, PC pellets instead agglomerate and discolor
Análise das causas
PC drying temperature 120℃ is appropriate; above 120℃ pellets soften and stick and thermally oxidize and discolor; temperature and time must be balanced, not the higher the faster；During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solução
Drying temperature controlled at 110-120℃; time 3-4h; agglomerated material screened out, discolored material downgraded；After adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
PC drying 120℃ is the upper limit, agglomeration and discoloration are overtemperature signals；After confirming effectiveness, solidify 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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