Material Drying
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PC insufficient drying hidden brittle fracture
Fenómeno del problema
【Problem Phenomenon】PC products appear normal in appearance but break brittlely during assembly or dropping, a hidden failure
Análisis de la causa
When drying insufficiency is slight, there are no silver streaks in appearance but the molecular weight has already decreased, and impact strength is greatly impaired; this hidden failure is the most dangerous, only exposed during assembly or use；During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solución
Moisture content strictly measured; impact strength sampling inspection; hidden brittle fracture traced to drying records；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 parameter changes to facilitate locating effective measures
Conclusión clave
Insufficient PC drying causes hidden brittle fracture; normal appearance does not mean qualification；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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