3D model Plastic moulded component

This is 3D modeling in autocad version 2012. Using so many types commands Solid modeling Such asd extrude ,sweep, fillet , 3d array, shade , render, mesh model commands. and using boolean union subtract etc. To extract plastic moulded part first we requiered the 3D Model of component. To manufacturing the moulds for we required the core and cavity that why worked out product design important.