Injection Molding
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Glass fiber PA requires special process parameters to avoid floating fiber and property fluctuation
Fenómeno del problema
Glass fiber PA requires special process parameters to avoid floating fiber and property fluctuation
Análisis de la causa
Injection speed on the low side, excessive glass fiber orientation, severe floating fiber
Injection speed on the high side, glass fiber breakage, reduced reinforcement effect
Barrel temperature on the low side, insufficient melt flowability, floating fiber
Mold temperature on the low side, poor fusion of glass fiber with matrix, rough surface
Screw design unsuitable for glass fiber PA, fast wear, much breakage
Solución
Medium injection speed, avoid too fast or too slow
Set barrel temperature to the high side of 170-230°C to improve flow
Set mold temperature to the high side of 40-80°C to improve surface
Select screw design suitable for glass fiber PA
At 30% glass fiber content, shrinkage drops to 0.3-0.5%
Conclusión clave
Glass fiber PA requires medium speed and high mold temperature
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