Material Drying
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Cracking, deformation, or poor coating occurs during secondary processing
Fenómeno del problema
Cracking, deformation, or poor coating occurs during secondary processing
Análisis de la causa
Cracking during machining (PA has high dry-state brittleness)
Insufficient surface treatment before coating, poor coating adhesion
Local overheating and degradation during hot bending or welding
Improper ultrasonic welding energy, poor weld quality
Poor compatibility between ink and cellulose acetate butyrate during printing, peeling off
Solución
Conditioning treatment before machining to reduce brittleness
Full surface treatment before coating (grinding/primer)
Control secondary heating temperature to avoid degradation
Optimize ultrasonic welding parameters
Select ink compatible with cellulose acetate butyrate
Conclusión clave
Post-processing needs to consider material state and compatibility
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