Injection Molding
3 visualizaciones
PEI Injection Speed Management
Fenómeno del problema
Improper PEI injection speed settings cause filling defects or shear problems; the speed window is difficult to grasp.
Análisis de la causa
PEI's high viscosity requires a relatively high injection speed, recommended at 50~80% of the screw's maximum speed; too fast causes shear heat and air entrapment; too slow causes front freezing and short shots; multi-stage injection balance.
Solución
①Injection speed in the range of 50~80% of the screw's maximum speed; ②multi-stage injection curve optimization; ③appropriate speed control in the gate area; ④verify filling status with short shot tests.
Conclusión clave
The 50~80% of PEI injection speed is quantitative guidance; multi-stage curves are a refined means; short shot tests provide intuitive verification.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!