Material Drying
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PCABS seasonal humidity adjustment
Problem Phenomenon
【Problem Phenomenon】PC/ABS silver streak rate rises in the plum rain season, the process is not adjusted with the season
Cause Analysis
Seasonal changes in environmental humidity affect pellet moisture absorption and drying endpoint; in the rainy season, drying time must be extended and hopper management strengthened; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based on experience alone
Solution
Extend drying by 1-2h in the rainy season; hopper heat preservation executed all year; workshop dehumidification assistance; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record the parameter changes, to facilitate locating the effective measures
Key Takeaway
PC/ABS rainy season drying is intensified, hopper management is year-round; 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 similar problems later
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