Injection molding process simulation of tensile strength and impact specimen test

The characteristic of plastic which are easy made and shaped, make plastic become famous in industry. Injection molding is one of plastic shaping process that used by common industry due to its capability of mass producing of complicated plastic part. In this study, the mold cavity was designed for making tensile strength and impact specimen tests. This design was suitable with 900 ton capacity HAITIAN MA 900/260e injection molding machine. ASTM D638 was used for tensile strength specimen test standart dimension and ASTM D256 was used for impact specimen test standart dimension. The study started with draw the specimen tests, design the mold cavity such as number of cavity, layout cavity, channel system, and cooling system, and then do simulation. The parameters variance of simulation were melt temperature, mold temperature, packing pressure, and packing time. The simulation result was analyzed by using Taguchi method and ANOVA. The result of study said that this machine could have 12 specimen tests. Taguchi method had result that the best parameter of injection molding process is 180o for melt temperature, 60o for mold temperature, 70 Mpa for packing pressure, and 5 sec for packing time. ANOVA had result that the significant process parameters were melt tempaerature, packing pressure and packing time, where melt temperature was the most valuable process parameter.