Taking a camera case as an example, using Moldflow software for finite element mesh division, establishment the cooling system and the flow channel. In order to get the shrink mark, shrinkage and warpage of the product, the mold temperature, melt temperature, injection time, injection pressure and cooling time were chosen as the objects of research. The L~6 orthogonal tables was established using orthogonal experiment, then get the optimum levels and indicate the impact of the process parameters on shrink mark, shrinkage and warpage by using th...