Our Process

Pattern Assembly

Several such patterns are assembled by sticking them on to wax bars called runners or sqrues. A cluster is formed and this is call “wax assembly”.

Shelling

The Wax Assembly is dipped into refractory slurry. After dipping, it is coated with refractory grains called “Stucco”. This process of

dipping and coating is repeated several times depending on the size and configuration of the component, this creates several layers until the required thickness is achieved. The process of surrounding the wax assembly with refractory materials is called “investing” in old English, which gives the process the name of “Investment Casting” process. A casting made through this process is called an “Investment Casting”.

Dewaxing

After the assembly is “invested” (covered with refractory layers), it is kept for drying. Once dried, the wax inside the assembly is

removed by melting it inside a steam autoclave. The removal of the wax was named in the past as “lost” by burning off; therefore this process of casting is also called the “Lost Wax Process”.

Shell Preheating

After removal of the wax, the resulting hollow “mould shells” are pre-heated in a shell pre-heating furnace to make them strong

enough to with stand the metal pressure when the liquid metal is poured into the shell.

Knock-Out

once the metal has been poured and cooled, the mould shells are put in a vibrating machine so the fragility of the

ceramic makes it break and reveal the metal assembly.

Cutting And Heat Treatment

Individual castings are cut-off from the cluster using an electric arc, a gas flame, or an abrasive disc.

Castings are then heat treated to achieve the required mechanical properties.

Value Added Processes

In many cases, the castings are subjected to additional operations such as machining, surface hardening, electroplating, electro

polishing and several other processes as per customer requirement.