A manufacturing method is proposed using two conventional methods, film insert molding and compression molding, to obtain rectangular of the size of 250 x 35 x 2.5 mm specimens of polycarbonate reinforced with 4% mat fibers glass with orientations 90/0 degrees and +/- 45 degrees, to investigate, disorientation of the fibers. A Finite Element Method was performed, using Moldflow to determine initial conditions to predict the behavior of the polymer during the compaction stage and then manufacture the mold. Physical tests were performed using a conventional injection machine, based on the results previously obtained in the simulation. Woven fiberglass did not require a chemical treatment previously to achieve adhesion between the two types of polycarbonate. Specimens of polycarbonate reinforced at 0/90 degrees and +/- 45 degrees orientation have demonstrated small fiber orientation distortion. For the case of 0/90 degrees specimens, the maximum deviation is show in the specimen with 2.58 degrees which represent a misalignment cause by compression stage which also happened in 0 degrees where the maximum standard deviation is 0.98 degrees. Measurements for the +45 degrees fibers, the standard deviation is 2.60 degrees and 2.23 degrees for -45 degrees. According to ASTM D3039, the deviation of fiber, are within the tolerance to be characterized and obtain the mechanical properties. POLYM. ENG. SCI., 59:E372-E379, 2019. (c) 2019 Society of Plastics Engineers