Abstract:To explore the influence of processing parameters on quality of injection-compression molded thick wall products,with the sink mark index as study goal,the parameters of injection-compression molding including melt temperature,mold temperature,press open distance,waiting time,press compression time,compression force and compression speed were chosen as the factors,and the orthogonal experiments were carried out by using Moldflow,and then the five parameters were chosen as the optimal variables,the single factor analyses were completed,the influence degree and trend of the various processing parameters on the sink mark index,deflection and volumetric shrinkage were also obtained.According to the experimental data,the processing parameters were optimized,the values of indicators were greatly reduced.