Material Drying
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PVC Plum Rain Season
Problem Phenomenon
In plum rain season PVC powder clumps and product bubbles increase
Cause Analysis
High-humidity environment powder absorbs moisture and clumps, feeding uneven and brings in moisture; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Powder silo dehumidified; sieve and dry before use; feeding system anti-bridging; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
High-humidity season powder management needs dehumidification and sieving; 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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