Development of Rapid Tooling for Investment Casting Using Fused Deposition Modeling Process

Abstract

Fused Deposition Modeling (FDM) process can be used to produce the rapid tooling directly or indirectly. However, rapid tooling application demands good surface finish since the poor surface finish of FDM parts has become a limitation for its tool application. So there is need to improve the surface finish of FDM made tools. In this study, surface roughness of FDM tools are drastically reduced by a post processing technique called chemical treatment process. Surface finish was improved by filling the gap between layers by diffusion of parent material. Thus FDM made tools can be used as direct as well as indirect tools after the chemical treatment. Comparative study was made between Silicon Rubber Moulding and FDM Tooling towards the cost, time, life of mould, quality and feasibility aspects. It was found that FDM tooling is more economical, easy to use, reduced cycle time, improved quality, long life of mould and more feasibility towards complex parts etc.