Extrusion & Post
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PA6 Glass Fiber Floating Fibers
Fenómeno do problema
GF-PA6 surface had rough fiber texture and poor appearance.
Análise das causas
Insufficient resin coating; low material temperature and mold temperature, and large shear make fibers concentrate on the surface; insufficient coating is the essence; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solução
①Raise material temperature and mold temperature;②reduce injection speed to reduce shear and front tumbling;③appropriately enlarge the gate to reduce shear rate and pressure loss;④appearance surfaces can be covered with texture or post-treated;⑤select reinforced grades with better coating.
Conclusão principal
GF-PA6 floating fibers = 'insufficient coating': raising temperature and slowing speed lets the resin wrap the fibers; appearance surfaces require process + texture + grade cooperation, and machine adjustment alone is hard to eradicate.
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