ABSTRACT
In casting industries with the development of technology there is need to cast complex and intricate parts very
accurately in dimension and geometry with the good surface finish. after the development of additive
manufacturing technologies the casting industries are able to improve casting by improving pattern making up
to certain limit and also some special casting processes like investment casting becomes more easier because of
direct manufacturing of wax pattern using 3D printers but due to different joints in complex component
manufacturing industries and also automobile industries require Mechanical joint less casting. So, now it
becomes necessary for casting industries to make direct mold without the use of pattern. Also, there is
development in additive manufacturing technology in material compatibility. This paper reviews the Additive
manufacturing technologies for growing patternless casting manufacturing.
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INTRODUCTION
In current industrial development, especially in developing country, it is required to achieve the highest quality in quick time as well as with the
lowest price.
In metal industry qualities like strength, dimensional & geometrical tolerance on component depends on
removal of mechanical joints from complex component, this can be done by improving design of part or component but there is limitation that in complex part we can reduce mechanical joint by improving component design & we cannot completely eliminate mechanical joints from complex part by design improvement.
http://www.pfa.org.pk/wp-content/uploads/2017/04/Technical_Review_of_Additive_Manufacturi-1.pdf
