WHAT IS INVESTMENT CASTING, HOW TO DO LOST WAX CASTING:-

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  • It is also called LOST WAX CASTING.
  • It is very ancient technologies i.e.  Used from years for many purposes of production.
  • In this method the pattern is made by the wax. The wax pattern then coated with ceramic material. The ceramic material then hardened so that it can take the shape of the pattern.
  • The ceramic mould will be expandable.
  • Large range of materials can be used for casting.
  • This method of casting is very popular because it provides, high accuracy and awesome surface finish. And compatibility with almost all metals and alloys.
  • The wax should be strong enough to endure the stresses or forces while the mould is being prepared.
  • This process of casting can be done for small casting as well as for large volume casting.
  • It has the ability to produce the exceptional complex shapes.
PROCESS:-
  1. In this process a pattern of ceramic is created to fill the material.
  2.  For this purpose, First of all make a pattern of wax. Any other appropriate material can also be used instead of using wax.
  3. A mould is needed to place the pattern. So one should create a mould of appropriate size to keep the pattern into it.
  4. After assessing the pattern of wax the ceramic material is applied onto the pattern. Then the ceramic material is hardened to create shape or a mould cavity around the wax.
  5. When the ceramic material get the shape of the pattern, the wax material is melted to get a cavity for desired product.
  6. Then the material is poured and allowed to solidify. The solidification process will take a definite time.
  7. After the solidification process the final product is to be taken out of the pattern.
  8. The pattern may require to be broken out to get the final product.
  9. The final processes of finishing can be performed if necessary.

ADVANTAGE: -

  1. This process is preferred because of its advantage of ‘good surface finish’.
  2. As the pattern will not be withdrawn by hand. Instead, it will be removed away by melting it. This provides the facility of producing complex shapes.
  3. Close tolerances can be achieved by lost wax pattern.

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