Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Relation of weld-quality and core shape in injection molding

사출성형 시 코어 형상과 웰드품질과의 관계

  • Lee, Gyu-Ho (Dept. of Mechanical Engineering, Pukyong National University) ;
  • Choi, Woo-Su (Dept. of Mechanical Engineering, Pukyong National University) ;
  • Noh, Keon-Cheol (Dept. of Mechanical Engineering, Pukyong National University) ;
  • Jeong, Yeong-Deug (Dept. of Mechanical Engineering, Pukyong National University)
  • Accepted : 2014.05.23
  • Published : 2014.06.13
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Abstract

The injection molding is used in more than 70% of total production of plastic products. Weld line in injection molded part is one of the defects in injection molding process. Weld line deteriorates not only appearance quality but also mechanical property. In this study weld quality has been examined according to the injection processing temperature, materials and mold designs. We selected four different materials such as PA, PP, ABS and PS as experimental materials. Weld quality increased as injection processing temperature increases. It was more dependent on materials flow ability. As a result, weld quality incase of rectangular core is better than circular core.

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