Molding Process
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Material sticking to the sizing sleeve of EEA extruded pipe
Fenómeno del problema
EEA extruded pipe sticks in the sizing sleeve, longitudinal adhesion marks appearing on the inner wall
Análisis de la causa
EEA is soft and easily adheres to metal surfaces; sizing sleeve inner wall rough Ra>0.4μm; sizing sleeve insufficiently cooled, surface temperature too high promoting adhesion
Solución
1) Polish the sizing sleeve inner wall 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) Apply a thin layer on the pipe surface to reduce adhesion
Conclusión clave
Sizing sleeve sticking is caused by elastomer adhesion characteristics; polishing and lubricating water are the key
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