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사출 성형에서의 Butt Weld Line에 대한 강도 연구
장민규(M. K. Jang),최해석(H. S. Choi),이호재(H. J. Lee),정영득(Y. D. Jung) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
Weld line is formed when separated melt fronts recombine together during the mold filling stage is one of problems in injection molding. Weld lines on the appearance of plastics parts can deteriorate visible quality. And most importantly, the local mechanical strength in the weld line area can be significantly weaker. It could be one of the most problems for structural applications in the weld line areas. In this study, the mold available two-shot - molding of same polymers have been designed, and a series of experiment about tensile strength in butt?weld - line area has been conducted using Taguchi's DOE(design of experiment) to optimize injection molding conditions decreasing of weld strength and find out a factor affected weld strength in two-shot-molding.