Simulation of injection process of polypropylene + styrene-butadiene rubber /natural rubber )PP + SBR / NR( thermoplastic elastomer

Thermoplastic elastomers )TPEs( bring a combination of good plasticity of plastics and mechanical properties of elastomers that are important to component designers. These materials are especially used in the automotive industry to make a variety of parts, including strong shields. The injection process is one of the most common methods of making these polymers, which allows mass and industrial production. In this study, the injection process of elastomeric thermoplastic shield made of polypropylene / styrene- butadiene rubber + natural rubber (PP + SBR / NR) was simulated using Autodesk Moldflow software and the appropriate injection port location, optimal process conditions and possible injection defects Were discussed. Injection mold filling time, injection pressure, melt and mold temperature, cooling time, warpage and shrinkage are among the parameters that have been analyzed in this study. Also, possible positions of air trapping and weld lines were identified as the most common possible injection defects.