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Injection molding is the most important process to produce plastic parts due to its ability to manufacture complex geometry of product in a single stage with high levels of reproducibility. Because of its high degree of automation, this process is also suitable for mass production purpose. The influence of injection speed, melt temperature and mold temperature on the properties of plastic product were observed in this study. The targeted properties were pressure profile, part weight and part shrinkage. The results show that the longitudinal shrinkage of the part could be decreased by increasing injection speed and melt temperature. The part weight was slightly affected by mold temperature and melt temperature, the maximum weight was obtained by low mold temperature and high melt temperature