Material Drying
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PMMA Recycled '2079851475616104451
Fenómeno do problema
PMMA products with recycled material blended in show increased bubbles and impurity spots
Análise das causas
Recycled material absorbs moisture and has accumulated heat history, and its moisture content and degradation degree are higher than virgin material; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solução
Dry recycled material separately for 4 hours; prohibit recycled material for optical parts; blending ratio not exceeding 20%; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusão principal
PMMA recycled material is dried separately and used in limited amounts, prohibited for optical parts; 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 future problems.
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