thermal residual stress;  warping;  Injection molded parts

Uneven thermal residual stress and its deformation are one of the common engineering problems in injection molding processing. The recursive formula obtained by applying the two-dimensional thermoviscous constitutive equation of thermally rheological simple materials numerically simulates the thermal residual stress and its warpage deformation in molding, and discusses the influence of temperature and pressure on the residual stress and deformation of injection molded parts by numerical experiments, and finds that uneven temperature change is the most important cause of warpage deformation of injection molded parts, and its influence is much greater than the effect of pressure, which is consistent with the conclusion of engineering experiments.