In this fourth lesson of this section, we will continue to apply the DOE theories from the first two lessons to real world examples of molded parts. This lesson focuses on a filter housing base and a large storage box. As this section progresses, we will continue to increase the number of process parameters and molding trials, applying DOE theory to reduce the number of runs while helping to maintain part quality.
Topic in this lesson include: how to evaluate various DOE tables and graphs to determine the optimal process for achieving desired part quality factors; how to compare the best and worst process set-ups and their impact on part warpage and flatness; how to establish a DOE strategy for a part with challenging wall thickness distribution; and how to determine whether the part is stable enough to be ejected using a molten core image at the time the mold opens.