Molding Process
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Material sticking to the sizing sleeve of EAA extruded pipe
Fenómeno del problema
EAA extruded pipe adheres in the sizing sleeve, and longitudinal adhesion marks appear on the inner wall
Análisis de la causa
EAA is soft and easily adheres to metal surfaces; the inner wall of the sizing sleeve is rough Ra>0.4μm; insufficient cooling of the sizing sleeve, high surface temperature promotes adhesion
Solución
1) Polish the inner wall of the sizing sleeve to Ra<0.2μm; 2) Fully water-cool the sizing sleeve, surface <30°C; 3) Pass lubricating water containing 0.1% silicone oil emulsion through the sizing sleeve; 4) Coat the pipe surface with a thin layer to reduce adhesion
Conclusión clave
Sizing sleeve sticking is caused by the adhesion characteristics of the elastomer; polishing and lubricating water are the key
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