Extrusion & Post
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Wrinkling During Winding of CMC Extruded Film
Fenómeno del problema
Transverse wrinkles and longitudinal creases appear after winding of CMC extruded film
Análisis de la causa
Film tension is uneven, fluctuating ±20%; uneven film thickness causes inconsistent stretching of each section; shrinkage after cooling differs in each direction
Solución
1)Automatic tension control system to stabilize winding tension; 2)Improve film thickness uniformity to ±5%; 3)Adjust guide roller parallelism <0.05mm/m; 4)Wind after the film is fully cooled to <30°C
Conclusión clave
Film wrinkling is caused by tension fluctuation and uneven thickness; automatic tension control and homogenization are the key
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