Rapid Manufacturing can be described as an ?Additive
Fabrication Technique’ to manufacture solid objects through the chronological
delivery of material and/or energy to precise points in the space for producing
that part. At present, the practice of controlling the process of manufacturing
with the help of computer by making use of mathematical model that has been
created through the computer’s aid is being followed. Rapid manufacturing, if
done with the help of Parallel Batch Production is capable of providing a huge
advantage in terms of cost and speed in comparison with alternative techniques
of manufacturing like die casting or Plastic Injection Molding.

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.