Investment Casting Manufacturer

SumangalCasting Pvt. Ltd. is a Rajkot based Investment casting manufacturer and supplier. We manufacture metal components that are designed, developed, and produced for use across various industries.

We offer expert consultation on design and development related queries from idea to implementation. Our investment casting process covers all the essential criteria related to quality, reliability, and certainty.

Our manufacturing plant is modern and uses advanced equipment for the casting process and we make the whole range of investment castings. With an installed capacity of 600 MT per annum, we manufacture engineering metal components of the highest grade.

Investment casting process

• The process of Investment casting is called lost-wax casting and is one of the oldest metal making process.
• The investment casting manufacturers replicate the features and details of an original sculpture to cast multiple identical metal parts.
• Intricate designs of the metal parts are successfully replicated through investment casting.
• The fundamental steps of the investment casting process -
• A pattern is designed in the form of an original wax model similar to the sample metal part that needs to be manufactured.
• After the wax pattern is made, mold making is done for the casting process. The outer rigid mold is made when the wax pattern is dipped in a ceramic slurry and sand-like stucco.
• The wax pattern is dipped in the slurry many times to get the desired thickness of the outer mold or shell. This mold becomes the exact negative of the original wax pattern.
• The wax-shell assembly is sprued with a tree-like structure to allow the molten metal to flow and provide a path for the air to escape. The shell-coated wax assembly is put in a kiln.
• There the shell gets hardened and due to the high temperature the wax is melted and drained out. The melted wax from the shell can be reused in the next investment casting process.
• The shell is cooled and water is flown into the shell through the vent tubes and feeder to check for any existing cracks in it, if found these cracks are then patched with a thick paste.
• Reheating the shell helps in removing the traces of moisture left in the shell and hardens the applied paste.
• Hot and melted metal is poured in the preheated shell. The molten metal is poured into these shells.
• The shells are preheated and kept hot at the time of metal pouring. The reason to do so is to prevent the shell from breaking or reacting with the hot metal.
• Later, the shell is blasted away to release the rough metal cast and for finishing, the spurs formed on the metal is cut off.
• These spurs can be reused in another investment casting process. The metal cast is then chased to remove all the signs of casting from it and smoothen the metal surface.