Abstract: Taking the buckle of automobile as an example, the injection molding was simulated using Moldflow software. Through analyzing the effects of materials kinds, melt temperature, and mold temperature, the best gate location and the optimized parameters were obtained. When PP(PP-7553) was used, the melt temperature was 220 ℃, and the mold temperature was 40 ℃, the minimum warp was obtained as 0.1519 mm.

Key words: melt temperature, mold temperature, automobile buckle, Moldflow software, polypropylene, injection molding, warpage, optimization, gate location