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Microfusion Investment Casting Company

Sumangal Castings Pvt. Ltd. is a Rajkot based leading microfusion investment casting manufacturer in India. We are the manufacturer and supplier of microfusion investment casting products in India, Netherlands, Poland, Russia, and other parts of the world.

Our modern manufacturing plant provides a complete range of microfusion casting products, where we manufacture engineering components of the highest quality.

Micro fusion in India is done at a large scale to produce metal casts. There are few prerequisites for the microfusion investment casting processes that must be followed –

  • It should be approved by the world’s leading and notifying agencies to assure product quality.

  • The products manufactured by the process of micro fusion must follow the international standards and should be made as per the requirements of the domestic and international OEMs.

  • The final metal products need to be treated with the same expertise and experience. 

Purchasing high-quality approved products, that can be safely used as parts of any machinery, is the prime concern of any buyer. Thus, the process of micro fusion needs to assure good product quality.

Microfusion Investment Casting Process

The precise details in the metal cast designs result from the process of micro fusion investment casting. These minutest details are attainable with all their intricacies like – slots, holes, lettering, complex undercuts, and dimensional accuracy.

Micro fusion investment casting helps you obtain metal casts obtained that have all the detailing of complex undercuts and display dimensional accuracy with complete precision.

Here’s a brief account of this process and how it’s done to produce high-quality casting products -

  • A tool/die is made with the help of machines. The cavities in the tool are in the same pattern as the original cast. Pressurized wax is filled in the cavity and a wax pattern is produced.

  • Mostly, aluminum alloys are used for this process and they can be easily handled, cooled, have high strength, and are easy in machining.

  • Petroleum wax or specialized wax can be used for wax pattern formation. The wax is melted following the QCP requirement of the pattern.

  • It is injected in the hollow tool containing the negative impression of the final product, to fill the spaces in the tool, and take the form of the final metal cast.

  • First, feeding the wax pattern into the hydraulic injection press, followed by injecting it into the hollow tool. Then the wax is allowed to get cooled and solidified.

  • The gating assembly is made by the process of making runner, riser, and spur.

  • The wax pattern model is then dipped in a ceramic slurry. Then repeatedly coated with the ceramic slurry to form the ceramic shell and attain the desired thickness of the ceramic shell. The repetitive dipping process helps in strengthening the shell mold.

  • Dewaxing is done before the pouring of the melted metal in the ceramic shell.

  • The assembly is placed in a pressured chamber, called a dewaxing autoclave, and steam is injected at high pressure. This melts the wax and the melted wax is removed from the shell.

  • The shell is then baked in a furnace to remove any traces of leftover wax. This also makes the shell compatible to endure the high temperature of poured liquid metal in the next step of the process. And the shell is ready to contain the melted metal without reacting to it.

  • The metal is poured in the shell and allowed to get cooled and solidified. The outer ceramic shell is removed by breaking it into the pieces with the help of a hammer machine. This process is referred to as knockout.

  • The metal cast undergoes the heat treatment process to gain the mechanical properties of the casting.

  • Grit blasting and pneumatic grinding give final finishing to the desired metal cast. The finished casting is machined.

  • Visual tests are done to check the finished products. The metal casts are checked on all the parameters to assure its quality and standard. 


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