There have been several types of Additive Manufacturing (AM) developed in the last few decades that can produce parts made of polymers, ceramic and metals. AM takes digital input in the form of a Computer Aided Design (CAD) model and creates the desired three dimensional part through an additive, layer-by-layer deposition process in 3D printing machine. At the initial phase of development of AM, only plastic items could be produced, which was being used as a pattern for casting. Further development on the AM was extended for producing ceramic and metal objects directly. It has provided several alternatives to produce a metallic component. These are Production of plastic model, which is used as a pattern for investment casting; Production of mould/core by 3D inkjet printing or binder jetting and casting; Direct production of metallic part by 3D printing.
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