Processing Machinery
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PMMA Solvent Cracking
Fenómeno del problema
PMMA products develop fine cracks after contact with alcohol
Análisis de la causa
Solvents such as alcohol penetrate stress concentration areas, inducing environmental stress cracking (ESC); during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
Products avoid contact with alcohol solvents; reduce internal stress in molding and anneal; use special reagents for cleaning; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Conclusión clave
PMMA ESC prevention requires avoiding solvents plus reducing stress; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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