Case Study: Nonuniform Wall StockIn this part the nominal wall stock was thinner than certain areas with a much thicker cross section. As a result of the variation in nominal wall stock the material temperature was run on the high side of the material supplier’s recommended temperature range. As a result, the cycle time to cool the thick areas was longer than necessary. A secondary problem with this type of part design is that the thinner nominal wall stock freezes early preventing full pack of the thick sections, which leads to sink, nonuniform cooling, and shrinkage resulting in warp.Maintaining nominal wall stock is critical for quality molding processes!