In this study, the experimental properties of Heat Deflection Temperature of acrylonitrile butadiene styrene and polycarbonate thermoplastics were investigated in five levels of the compound with injection pressure, injection temperature, specified injection speed and constant maintenance. After testing the components, the data obtained for The software for minifrection 16 has been analyzed by Taguchi method and the result is that pure polycarbonate has the greatest effect on the softening temperature, which is then reduced by the addition of acrylonitrile butadiene styrene to the amount of softening temperature.