Material Drying
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ASA humidity seasonal adjustment
Problem Phenomenon
[Problem phenomenon] ASA defect rate rises in rainy season, the same process performs differently in summer and winter
Cause Analysis
Seasonal changes in environmental humidity affect pellet moisture absorption rate and drying endpoint; shortened open-bag exposure time and extended drying time in rainy season are necessary adjustments; during on-site investigation, verify item by item according to this mechanism, avoid blindly adjusting the machine based on experience alone
Solution
Rainy season drying extended 1-2h with densified moisture content sampling; hopper heat preservation executed year-round; workshop dehumidification auxiliary; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
ASA process adjusted with seasons, rainy season drying and sampling doubly strengthened; 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 subsequent similar problems
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