The procedure through which a metal is to be processed to mould into different shape with the aid of heat when the work piece is transformed by the speedy concluding of a blow and the work piece forced by die to match to a die crater is known as forging. The shape of the work piece can be changed when it is forged by a sequence of blow and processes of die. When the work piece is to be reformed into a new shape then the work piece should be kept on die. Work piece when contacted with the ram is forced to metal and heat to transform into new structure with a blow of a die. Flash helps in release of excessive pressure generated by closing die valves and it acts as the relief valve. Flash is necessary to withstand the seam of the blow. Thus, after reformation the flashing is removed.

Forging is a process of molding hot metals into different shapes. Other process of molding also include like custom injection molding, plastic injection molding, plastic molding. In plastic injection molding, various plastic materials are conformed into several good shapes and the process is very cost effective. Plastic molding is a procedure where coarse plastic is compelled to move into heated chamber where the melting process starts as the plunger progresses the melted material of plastic is molded in to various shapes. This happens when the plastic material becomes cold and solidifies in to different shapes.

Various shapes and sizes can be formed through forging like 3D or 2D shapes. The process can be repeated as the cost is very low and various finished products can be formed through forging. However, before forging the material used for the purpose should be good enough to produce finished products that can be used for prolong period of time. The physical properties that are required for the forging are toughness, ductility and strength.

There are various general processes of forging like open die forging, forging through pressing, forging through precision, upset forging, forging through the shape of a net and roll forging. Thus, forging are very important as it produces various materials of different shapes and sizes in machine shops.