Injection Molding
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Difficult demolding of EVA '2079851475616104452
Problembeschreibung
EVA injection molded products have large demolding force with deformation or strain damage; demolding time accounts for 30% of cycle
Ursachenanalyse
Large adhesion between EVA and mold cavity; demolding draft insufficient <0.5°; insufficient cooling time with product demolded before full solidification; unreasonable ejection mechanism design
Lösung
1) Increase mold demolding draft to 1-2°; 2) Extend cooling time to demold after full solidification; 3) Polish mold surface to Ra<0.2μm; 4) Increase ejection area using large-area ejector plate; 5) Spray mold release agent (temporary solution)
Wichtigste Erkenntnis
Difficult demolding is caused by adhesion and insufficient mold design; increasing demolding draft is the fundamental measure
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