OPTIMIZATION OF INJECTION MOLDING PARAMETERS TO ENHANCE THE QUALITY OF TRANSPARENT POLYCARBONATE (PC) PRODUCTS

Abstract

This study provides an optimization method for the injection molding parameters of a SABIC PC product, grade LEXAN™ 141R, with a melt flow index of 10.5 g/10 min, by conducting experiments on an injection molding machine. The part used in the experiment is the transparent outer housing of an electronic product. The research investigates the influence of molding parameters on visual defects, namely weld lines, and the deviation of a critical dimension. The experiments were conducted using an L16 orthogonal array and were analyzed using Grey Relational Analysis (GRA). The input variables were examined using the ANOVA method. To determine the optimal molding parameters, the Taguchi method was used in combination with GRA. In these experiments, we obtained the optimal parameters, achieving a 69.28% reduction in weld line width and a 65.76% reduction in dimensional deviation.