Material Drying
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PP Silver Streak Drying Misjudgment
Fenómeno del problema
PP silver streaks still appear after drying verification, equipment or process factors troubleshooting.
Análisis de la causa
PP silver streaks still appear after sufficient drying; nozzle heater leakage; excessive back pressure; screw wear; excessive residence time; equipment inspection omissions.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solución
①Drying verification confirmation; ②nozzle heater inspection; ③back pressure reduction; ④screw wear inspection; ⑤residence time management.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Post-drying equipment troubleshooting of PP silver streaks is deep diagnosis; nozzle and back pressure are common omissions; systematic adjustment.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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