Shrinkage and Warpage Detailed Analysis and Optimization for the Injection Molding Process Using Multistage Experimental Design

This work suggests a multistage experimentation for modeling and optimization of the shrinkage and warpage of injection molding parts. This methodology has moderate experimental size while analyzing all important interactions. Phase 1 is Taguchi experimentation, which determines significant factors, and Phase 2 is full factorial. This technique reduced the number of experiments from 729 to 108. It also assisted in modeling shrinkage and warpage up to an error value of 0.23 and 0.07 mm, respectively. It also resulted in better optimal process settings than single-stage Taguchi experimental design while performing fewer experiments than full factorial with all factors included.