Moldex3D (Chupei City, Taiwan) has linked its 3D injection molding simulation software to Livermore Software Technology Corp. (LSTC)'s (Livermore, CA, US) LS-DYNA draping analysis software for multicomponent molding simulation. This linking is designed to assist molders performing two-step overmolding, which usually includes draping of a fiber prepreg, followed by overmolding via back injection in an injection molding machine. A major challenge in this process is to effectively predict the product properties that combine these two parts. Moldex3D R14 version has integrated with LS-DYNA’s draping analysis to simulate the deformation behavior. The fiber mat orientation of the fiber prepreg after the draping process can be considered in Moldex3D’s analysis for the subsequent molding process to obtain a more comprehensive warpage analysis of the composite product. LS-DYNA focuses on analyzing the deformation behavior of a continuous fiber in compression molding. Moldex3D will incorporate LS- DYNA’s calculation of prepreg deformation and consider the product geometry and continuous fiber mat orientation analysis as the parameters of a part insert. In Moldex3D’s filling analysis, it will consider the prepreg geometry and its material characteristics as the boundary condition. In the subsequent warpage analysis, it will consider the insert as a continuous fiber composite material and perform a deformation analysis of a multi-component part. Through Moldex3D’s Multiple Component Molding feature, the fiber mat orientation predictions of a uniaxial prepreg in three directions can be analyzed and the product’s strength variation in different directions can be attained. Moldex3D’s filling analysis also considers the effect of chopped fiber orientation in the subsequent plastic molding process and reportedly is able to observe the influences of the plastic material and the chopped fiber orientation.