Injection Molding
8 visualizaciones
ASA injection pressure setting improper
Fenómeno del problema
ASA products have incomplete filling and poor surface replication at low pressure, and flash and internal stress cracks appear at high pressure; the window is difficult to grasp.
Análisis de la causa
Toray recommends an ASA injection pressure range of 70~140MPa; when pressure is too low, the flow end density is insufficient and the surface darkens; when too high, molecular orientation stress and flash coexist; switch to holding pressure immediately after filling ends.
Solución
①Injection pressure set within the 70~140MPa range; ②immediately reduce to holding pressure after filling ends; ③comprehensively adjust in coordination with product shape, gate size and mold temperature; ④solidify parameters with dual indicators of weighing and appearance.
Conclusión clave
The ASA pressure window has a clear supplier guidance range; timely switching between injection and holding pressure is a key action; parameter solidification relies on objective indicators such as weighing.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
¿Le ha resultado útil?
0 personas encontraron esto útil
¡Gracias por sus comentarios!