Injection Molding
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Glass Fibre '2079851475616104452 low weld line strength
Fenómeno del problema
Glass Fibre injection multi-gate product strength at weld line only 30-40% of the whole
Análisis de la causa
Two melt fronts' temperature has dropped, causing small molecular chain diffusion depth and insufficient entanglement; dispersed phase orientation discontinuous at weld line
Solución
1) Raise injection temperature 10-15°C to increase diffusion depth; 2) raise injection speed to keep front temperature higher; 3) increase holding pressure to ensure weld compaction; 4) set overflow well at weld line and cut off afterwards
Conclusión clave
Low weld line strength is caused by insufficient molecular entanglement; high-temperature high-speed injection and overflow well are effective countermeasures
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