WHAT IS INVESTMENT CASTING, HOW TO DO LOST WAX CASTING:-
- 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:-
- In this process
a pattern of ceramic is created to fill the material.
- For this purpose, First of all make a pattern
of wax. Any other appropriate material can also be used instead of using wax.
- A mould is
needed to place the pattern. So one should create a mould of appropriate size
to keep the pattern into it.
- 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.
- When the ceramic
material get the shape of the pattern, the wax material is melted to get a
cavity for desired product.
- Then the
material is poured and allowed to solidify. The solidification process will
take a definite time.
- After the
solidification process the final product is to be taken out of the pattern.
- The pattern may
require to be broken out to get the final product.
- The final
processes of finishing can be performed if necessary.
ADVANTAGE: -
- This process is
preferred because of its advantage of ‘good surface finish’.
- 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will not be withdrawn by hand.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.
- Close tolerances
can be achieved by lost wax pattern.
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