Injection Molding
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Severe Excessive Orientation of CMC
Fenómeno del problema
Longitudinal-transverse property difference of CMC products >50%, excessive orientation
Análisis de la causa
Injection speed is too fast and molecular chains are highly oriented in the flow direction; gate design causes unidirectional flow
Solución
1)Reduce injection speed to reduce orientation; 2)Multi-point gates to reduce unidirectional flow; 3)Annealing treatment to partially release orientation
Conclusión clave
Excessive orientation is caused by fast unidirectional flow; speed reduction and multi-point gates are the key
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