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Selective Laser Sintering or SLS is said to be a free-form
manufacturing technology which is developed by 3D systems. SLS is a method of
layered manufacturing which creates a solid 3D object by blending powdered
substances along with carbon dioxide. In other words SLS is one of the famous
mechanisms of Rapid Prototyping in which a laser beam carefully sinters or
fuses the powdered substances such as elastomer, nylon etc. A thin layer of
that powdered substances is being laid down and the laser sketches on the layer
sintering together the elements hit by the laser. SLS can provide a persons
manufacturing company with most important perimeter by producing metal or rapid
plastic prototyping which narrowly matches their molded complements.  

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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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