Molding Process
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Material sticking to the sizing sleeve of EAA extruded pipe
Problembeschreibung
EAA extruded pipe adheres in the sizing sleeve, and longitudinal adhesion marks appear on the inner wall
Ursachenanalyse
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
Lösung
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
Wichtigste Erkenntnis
Sizing sleeve sticking is caused by the adhesion characteristics of the elastomer; polishing and lubricating water are the key
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