Investment casting history
Investment casting is an industrial process based on and also called low wax casting, one of the oldest known metal-forming techniques.
5000 years old. Originally done with bees wax and clay. Used by Egyptians, Mesopotamians, Mayans to make statues or idols, jewelry and ornaments. Demand in 19 th century for dental application
Steps in investment casting
1.Preparing the heat-disposal wax, plastic or polystyrene patterns in a die.
2.Assembly of the prepared patterns into a grating system
3.Ceramic coat is applied and then the refactory material named stucco is applied
4.Melting the pattern assembly(burning out wax) by firing, for removing the traces of the pattern material
5.The metal in molten state is poured into the formed mold
6.The metal in molten state is poured into the formed mold
7.Cutting off the unwanted parts like gates, spruce, pouring basin
8.Finishing operations to get the desired dimensional tolerance and finish
3.Ceramic coat is applied and then the refactory material named stucco is applied
How It Works?!
1.Investment
The ceramic mold, known as the investment, is produced by three repeating steps: coating, stuccoing, and hardening.
The first step involves ddipping the cluster into a slurry of fine refractory material and then letting any excess drain off, so a uniform surface is produced
In the second step, the cluster is stuccoed.
Finally, the coating is allowed to harden.
The investment is then allowed to completely dry, which can take 16 to 48 hours
2.Dewaxing
It is then turned upside-down and placed in a furnace or autoclave to melt out and/or vaporize the wax.So as the wax is heated it expands and induces great stresses. In order to minimize these stresses the wax is heated as rapidly as possible so that the surface of the wax can melt into the surface of the investment or run out of the mold, which makes room for the rest of the wax to expand
3.Burnout and preheating
The mold is then subjected to a burnout, which heats the mold between 870˚C and 1095˚C to remove any moisture and residual wax. Sometimes this heating is also as the preheat
4.Pouring
The investment mold is then placed cup-upwards into a tub filled with sand. The metal may be gravity poured, but if there are thin sections in the mold it may be filled by applying positive air pressure, pressure assisted pouring
5.Removal
The shell is hammered, media blasted, vibrated, water jeted, or chemically dissolved(sometimes with liquid nitrogento release the casting.the sprue is cut off and recycled. The casting may then be cleaned up to remove signs of the casting process, usually by grinding
Why Us!
We shall strive to be leaders in this business by offering products of a world class quality, and through constant technological innovation. We understand the needs of our customers and shall stay focused on them by offering them products, service and solutions of the highest quality..
Excellent surface finish
We enhance our industry operations by relieving you of the worries associated with freight forwarding.
100% Satisfaction Guarantee
Tight dimensional tolerances,Complex and intricate shapes may be produced
Highly Professional Staff
Our Technical team is having minimum work experience of 20 years in the same field
Low material waste
A wide variety of material can be cast using this method
