Extrusion & Post
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Glass Fibre extrusion unstable dimensions
Fenómeno del problema
Glass Fibre extruded product cross-section dimensions fluctuate ±10%, length direction also has periodic variation
Análisis de la causa
Feed amount unstable, feed screw speed fluctuates; extrusion temperature periodically fluctuates ±5°C; haul-off speed not matched with extrusion speed
Solución
1) Use loss-in-weight feeder to ensure stable feeding; 2) extruder each zone temperature PID control accuracy ±1°C; 3) haul-off speed closed-loop control linked with extrusion speed; 4) processing temperature controlled at 160-220±5°C
Conclusión clave
Extrusion dimensional stability depends on feeding accuracy, temperature control and haul-off synchronization
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