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Rapid prototyping is a process by which a working model or
prototype is developed to test the various design ideas, features, concepts, use,
functionality and performance. The user can immediately give a feedback to the
producer. The technology of rapid prototyping is quite revolutionary and
innovative and has found widespread applications in nearly all types of
industries. The prototypes can be developed on the basis of past design and its
performance and necessary modifications can be made to refine the final product
as per the requirements. Rapid prototyping has manifold advantages like
reduction of process cost, time and risks, conceptualizing of the actual
product, delivery of high quality product, better communications and so on.

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Casting is basically the
manufacturing process through which a liquid material is emptied into a mold
that includes a hollow opening of the desired art or shape and is then allowed
to harden. This hardened casting is then removed and broken out in order to
complete the process. Apart from using sand as the main mold material there is
a metal that is used as the mold. Normally, a cast meehanite or an iron is used
as the material for mold and the objects are made from the sand or metal. The
cavity surface is basically covered with a thin layer of material that is heat
resistant which can be either sodium silicate or clay.

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