Injection Molding
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PMMA Injection Temperature Window Management
Fenómeno del problema
Light transmittance fluctuates between product batches, and measured melt temperature deviation among machines is large.
Análisis de la causa
PMMA light transmittance is temperature-sensitive; locking the 235±5℃ window can stabilize transmittance ≥91.5%; machine temperature control differences directly cause batch fluctuations.
Solución
①Unify melt temperature window settings; ②calibrate thermocouples of each machine; ③test light transmittance and YI batch by batch; ④archive stabilized process parameters.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusión clave
Temperature window standardization is the guarantee of PMMA optical quality consistency; measured melt temperature uses a unified benchmark, and parameter archiving facilitates traceability.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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