Processing Machinery
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PA66 glass fiber floating fibers
Fenómeno del problema
Surface fibers exposed, poor appearance.
Análisis de la causa
Insufficient encapsulation; low temperature, high shear; fibers enrich toward the surface; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience; during troubleshooting, confirm item by item around key factors such as glass fiber and floating fibers to avoid misjudgment.
Solución
①Raise temperature; ②reduce injection speed to reduce shear heat and flow disturbance; ③appropriately enlarge the gate to reduce shear rate and pressure loss; ④appearance surfaces can use texture covering or post-treatment; ⑤select reinforced grades with better encapsulation.
Conclusión clave
GF-PA66 floating fiber='encapsulation': raise temperature and slow speed; appearance surfaces need process + texture + grade coordination; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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