Material Drying
8 visualizaciones
Radial silver streaks on product surface
Fenómeno del problema
Silver-white streaks radiating outward from the gate; the product appearance is severely defective
Análisis de la causa
The material contains moisture or low-molecular volatiles; excessive temperature in the rear barrel section causes a component to decompose and produce gas; insufficient back pressure fails to squeeze the gas out of the melt
Solución
Strictly dry to moisture <0.05%; reduce the rear barrel section temperature to reduce decomposition; increase back pressure to 5-10MPa to squeeze out gas
Conclusión clave
Silver streaks are a direct manifestation of gas entrained in the melt or decomposition gas
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!