Special Casting Processes
Special Casting Processes
Special Casting Processes
1) Centrifugal Casting
a) True b) Semi c) Centrifuging
2) Die Casting
a) Hot chamber b) Cold chamber
3) Investment Casting
True centrifugal casting
Disadvantages:-
• Contaminations of inner surface of the casting make it
necessary to increase
• finishing allowance for subsequent machining of inner
surfaces.
• An inaccurate diameter of the surface of a casting.
Semi-centrifugal casting
When the molten metal enters into the mold from two gates
and when these two streams of molten metal meet at a
junction with low temperatures than they do not fuse with
each other and solidifies creating a cold shut (appear as line
on the casting). It looks like a crack with round edge.
When the molten metal solidifies before completely
filling the mold cavity and leaves a space in the mold
called as misrun.