Precision Investment Casting

Precision investment casting is done by an expendable, injection wax, molded wax pattern method that helps in making or replicating complex forms and surface detailing in the produced metal product. A great method to get exceptional accuracy in a product design despite the material type and size.

If you are looking for a good quality Precision Investment Casting products manufacturing company to make any specific customization in a metal part, then Sumangal Casting Pvt. Ltd. can do the work for you.

We are the leading investment casting products manufacturer and supplier in India and worldwide.

Our Rajkot-based manufacturing plant providing a whole range of investment castings made from ferrous metals and its alloys including the cobalt and nickel super-alloy.

Our advanced casting process manufactures engineering components of the highest quality with an installed capacity of 600 MT per annum. One disposable pattern is used to produce only one metal part.

Benefits of Precision Investment Casting

There is more than one benefit of choosing Precision investment casting. It’s a highly touted way of making a diverse range of metal parts and components. Benefits of precision investment casting –

• You get an excellent surface finish.
• Any metal cast can be prepared using this process.
• High precision and dimensional accuracy in the final product.
• Extremely intricate parts can be successfully made.

     Precision Investment Casting Process

• The first step involves the making of an original wax model.
• Precision investment molds are created.
• Hot melted wax is poured in the mold to create an inner lining. A hollow wax copy is formed and it is then removed from the mold.
• The hollow wax copy is then chased with a hot metal tool to even out any marks and dressed to hide imperfections in it. Now, the wax looks like a finished piece and it is sprued with a tree-like structure, meant to make way for the air to escape and for the molten material to flow through it.
• The spruced wax copy is dipped into the slurry of silica and then sand-like stucco. The shell is prepared and allowed to dry. This process is repeated to achieve the desired thickness of the shell coating. For bigger pieces, the shell coating needs to be thicker. The inside of the cup is not coated and kept hollow. The core is then layered with fireproof material.
• Now the shell-coated piece is placed cup-down in a kiln where the shell gets hardened due to the heat and the wax is melted and runs out. This melted wax can be recovered to be reused.
• The shell is now cooled and tested with free-flowing water through the vent tubes and feeder. If any cracks are discovered they’re patched with a thick paste.
• The shell is reheated to remove any traces of moisture from it and to harden the applied paste. After this, the process of pouring is conducted.  The shells are first placed in a tub of sand with their cups facing upward and then the molten metal which is melted in a furnace is poured into these shells. This process should be done carefully and the shells should be hot while the metal is poured into them or they will break if they are cold at the time of pouring.
• Later the shell is removed and blasted away and the rough-casting is released. The spurs formed on the metal are cut off and these metal pieces that are cut off will be used in another casting process.
• Now the metal cast is chased to remove all the signs of casting from the surface by smoothing it. After being polished the prepared casting now looks like the original model.