Abstract: The injection molding process of the automobile interior decoration lock body part was simulated based on Moldflow software in this paper. The best gate location, flowing, warping, and cooling during the injection were analyzed. According to the distribution of air traps in the part and the mold structure, the gating system was designed reasonably. Keeping constant time of holding pressure, the total deformation of the part reached a minimum value. When the local mass of the part and the thin wall surface was large, the warp deformation was seriously affected by the structure of the part.

Key words: holding pressure, injection molding, Moldflow, interior decoration lock, gate location, cooling, wrap