Injection Molding
4 Aufrufe
Low Weld Line Strength in CMC '2079851475616104452
Problembeschreibung
In multi-gate CMC injection molded products, the strength at the weld line is only 30-40% of the whole
Ursachenanalyse
The temperature of the two melt fronts has dropped, resulting in small molecular chain diffusion depth and insufficient entanglement; dispersed phase orientation at the weld line is discontinuous
Lösung
1)Increase injection temperature by 10-15°C to increase diffusion depth; 2)Increase injection speed to keep front temperature high; 3)Increase holding pressure to ensure compaction at the weld; 4)Set an overflow well at the weld line and cut it off afterwards
Wichtigste Erkenntnis
Low weld line strength is caused by insufficient molecular entanglement; high-temperature high-speed injection and overflow wells are effective countermeasures
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!