Injection Molding
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PA6 Injection Speed Strategy
Fenómeno del problema
Jetting marks appear on the surface, or incomplete filling appears after reducing speed for surface quality
Análisis de la causa
PA6 usually requires filling as fast as possible to prevent solidification; but high speed in glass fiber reinforced grades aggravates floating fibers and jetting, forming a contradiction between surface quality and filling completeness
Solución
①Inject neat PA6 as fast as possible; ②Appropriately reduce speed for reinforced grades in exchange for surface quality; ③Use temperature to compensate for the filling loss caused by speed reduction; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
PA6 injection speed strategy must be set separately by grade; neat material seeks speed, reinforced material seeks stability, and temperature is the regulating valve between the two; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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