Material Drying
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PA66 rainy season strengthening
Fenómeno do problema
In the rainy season PA66 silver streak defect rate rose from 1% to 8%, conventional process failed
Análise das causas
High-humidity environment accelerates raw material moisture absorption and increases dryer load, conventional drying margin is offset; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solução
In the rainy season extend drying 1-2 hours and increase sampling frequency; raw material warehouse dehumidified and humidity controlled below 60%; open and use immediately to reduce exposure; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Systematically strengthen drying and warehouse dehumidification in high-humidity seasons; 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 subsequent similar problems
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