Molding Process
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PPS melt temperature 300-340℃
Fenómeno del problema
Low melt temperature causes filling difficulty and thick weld lines; exceeding 360℃ causes degradation and discoloration
Análisis de la causa
PPS melting point is about 280℃, melt temperature window 300-340℃; too low temperature means poor flowability and obvious weld lines; exceeding 360℃ causes thermal degradation, and high-temperature melt has irritating gas release risk
Solución
①Melt temperature set at 300-340℃; ②strictly prohibit exceeding 360℃; ③local exhaust at the machine head to prevent irritating gas accumulation; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
The high-temperature window 300-340℃ of PPS is a balance of flowability and safety; exhaust configuration is a supporting requirement for high-temperature processing; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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