Abstract: In this paper, the unequal thickness plastic parts was studied. The injection molding of plastic parts was simulated through finiteelement software, the predeformation compensation technology was used for mold parting surface. CAE analysis and experimental results showed that the amount of warpage of plastic parts was reduced from 1.830 to 0.1 mm

Key words: warpage deformation, pre-compensation, computer aided engineering, mold design