Based on generating mechanism and mathematical model of residual stress in traditional injection process

plane polarization and numerical simulation method were used to research residual stress distribution of ICM(injection compression molding)products with variety curvature qualitatively and quantificationally. The investigation has shown that residual stress distributions followed the shape of part except gate and end of part region. Well geometric asymmetry of stress fringe were detected in ICM-seq molding

while two layers of stress distribution states at end of part were found in ICM-sim molding. The phenomenon was different from tradition injection molding. Within the same plane

maximum residual stress values were reduced as the decrease of curvature. Meanwhile

inversely proportional relationships between average residual stress and part curvature were obtained for all different type of part (except for plate shape). It makes sense for optimizing design of optical products with variable curvature.