Injection Molding
1 visualizações
Difficult demolding of EVA '2079851475616104452
Fenómeno do problema
EVA injection molded products have large demolding force with deformation or strain damage; demolding time accounts for 30% of cycle
Análise das causas
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
Solução
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)
Conclusão principal
Difficult demolding is caused by adhesion and insufficient mold design; increasing demolding draft is the fundamental measure
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!