Abstract: The injection molding of glass fiber reinforced PP for anelectric box covers was simulated and analyzed by Moldflow software. The first step was to find the best gate location according to the conventional method, to determine the contrast parameters, and the average fiber orientation value of 0.9956 was detected. The second step was to get fiberglass WIP in the best orientation of value by setting different gate location, and the average fiber orientation value of the best gate location was 0.9992.According to the tensile modulus and poisson cloud graph, this gate location was verified to be the best gate location.

Key words: short fiber reinforced plastic, fiber orientation, gate location, injection molding, processing parameter