DOE applied to optimization of aluminum alloy die castings

This paper discusses the application of a design of experiments (DOEs) experimental method for analysing the influence of three injection parameters (slow shot, fast shot and up set pressure) on the internal quality of die casting SAE 305 alloy parts. Initially, the experimental methods applied to the manufacturing process are described. An experimental design was followed: it employed different combinations of injection parameters and aimed to assess the presence of porosity in the die casting parts. The quality assessment of the die casting parts was based on density measurements and qualitative image analysis. Results were evaluated by means of variance analysis, which assessed how the variation in the three different injection parameters influenced the integrity of the components.