Introduction of casting process

Casting process 

There are the only processes where liquid metal is used. Casting is also one of the oldest known manufacturing processes. It requires preparation of a cavity usually in a refractory material to resemble closely the final object to be made. Melten metal is poured into this refractory mould cavity and is allowed to solidify. The object after solidification is removed from the mould. Casting processes are universally used for manufacture of a wide variety of products. The principal process among these is sand casting where sand is used as the refractory material. The process is equally suitable for the production of a very small batch as well as on a very large scale. 

Some of the other casting processes for specialised needs are:

--shell-mould casting 

--precision-investment casting

--plaster-mould casting 

--permanent-mould casting 

--die-casting

--centrifugal casting