Material Drying
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PCABS Thermal Silver Streaks
Fenómeno del problema
PC/ABS thermal silver streaks are caused by excessive temperature or excessive residence time, to be distinguished from moisture silver streaks.
Análisis de la causa
PC/ABS thermal silver streaks are material degradation; excessive temperature or excessive barrel residence time; polymer chains break and release gas; similar in appearance to moisture silver streaks but different in cause; temperature-sensitive material.
Solución
①Systematically reduce barrel temperature; ②shorten cycle time; ③match shot size to the machine; ④distinguish from moisture silver streaks; ⑤degradation monitoring.; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusión clave
The distinction between PCABS thermal silver streaks and moisture silver streaks is precise diagnosis; temperature and residence time are the adjustment directions; monitoring prevents degradation.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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