Injection molding is well suited for mass production of complex shapes plastic parts with precise dimensions. The injection molded product quality is influenced by many process parameters especially in complex shape parts. Hence, the optimum process parameters are crucial for desire quality products. This study aim to analysis the flow of material in complex plastics shell injection molding processes of two and three plates mold layouts using Mold flow insight. The Mold flow Plastic Insight (MPI) is useful tool to decide the gate position and the suitable types of plastic material for the complex part with shorter time. Typical Mobile Phone cover model was selected as a product to be examined. Selected parameters of end fill pressure, sink marks, weld lines and time to reach ejection temperature are analyzed to examine quality of products. From the analysis result, three plates mold is better feasible and applicable for complex plastics shell high quality products
