Casting process involves adding pressure to the molten materials to shape it to a mold at under high pressures. In the mold the material is made to cool and later hardens to form the required final product shape. The most common casting materials used is aluminum and steel molten metals. The non-metallic materials are like rubber, plastic and spray are

By using casting process along with some specifications the replica of an object is made, which is known as pattern. Different types of patterns are used in the casting process which depends upon the configuration of casting they are divided into 8 types. They are: Single piece pattern Cope and drag pattern Loose piece pattern Sweep pattern Skelton pattern Match

Flask: A wooden frame or metal without static top or bottom, a mould is formed. The moulding structure depends on the location of the flask. It is known with various names they are DRAG, COPE, and CHEEK. Drag: Is for lower moulding flask Cope: Is for upper moulding flask Cheek– In the three piece moulding intermediate moulding flask is used.