Optimization of Injection Molding Process to Minimize Weld-line and Sink-mark Defects Using Taguchi based Grey Relational Analysis

Abstract

The study gives an insight of the material ABS stare UT-0510T material with MFI OF 16G/10MIN by conducting experiment on an injection molding machine. The part that is considered for this V3 window transparent used in air conditioners. This study is basically done to identify the effect of molding parameters on defects such as weld line and sink mark. The experiments have been performed by using L27 ORTHOGONAL ARRAY and these have been normalized by Grey relational analysis (GRA).The input variables are considered by using ANOVA. To determine optimal molding parameters Taguchi method constructed GRA was used. On these experiments we got optimized parameters which have reduced the weld-line width of 56.4% and sink mark depth of 68.9.