A Study on the Weld Line Strength in Injection Molded Part

사출성형품의 웰드라인 강도에 관한 연구

  • 모정혁 (서울산업대학교 정밀기계공학과) ;
  • 홍형식 (서울산업대학교 정밀기계공학과) ;
  • 류민영 (서울산업대학교 금형설계학과)
  • Published : 2003.10.01

Abstract

Weld line in injection molded part is one of the defect in injection molding process. Weld line deteriorates not only appearance quality but mechanical property. In this study weld line strength has been examined according to the injection operational conditions, materials and mold designs. PC and PP were used, and four different specimens were used in this experiment. Weld line strength decreased as injection temperature increases for PC. It was more dependent on mold temperature than injection temperature for PP Among the four different specimens, uneven thickness specimen showed the highest weld line strength.

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