Skip to main content

What’s the process of investment casting?

Investment casting is also known as lost-wax casting. It’s a process used by investment casting manufacturers in which a duplicate metal sculpture is made from an original sculpture. Intricate designs and work can be achieved through investment casting.

Wax pouring and removal

After the mould making is done hot melted wax is poured in the cast to create an inner lining to form an even coating. The hollow wax copy is removed from the mould.

Chasing and spruing

The hollow wax copy is then chased. In this process, a hot metal tool is used to even out any marks left and the wax is dressed to hide any imperfections to prepare the final finished look. Now, the wax looks like a finished piece. After this, the wax copy is sprued with a tree-like structure that’s meant to provide a path for the air to escape and the molten material to flow.

Slurry

A sprued 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.

Burnout

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.

Model preparation

First, an artist or mould-maker makes an original wax model in the casting process.

Testing

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.

Pouring

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.

Release

Later the shell is either 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.

Metal chasing

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.

Investment Casting Manufacturer & Supplier in India

Sumangal Casting Pvt. Ltd. is the leading Investment casting manufacturer and supplier. We have a modern and well laid out manufacturing plant in Rajkot. We provide a whole range of investment castings made from ferrous metals and its alloys that include the cobalt and nickel super-alloy. 

Our advanced casting process has an installed capacity of 600 MT per annum and it manufactures engineering components of the highest quality where one disposable pattern produces only one metal part.

Comments

Popular posts from this blog

What Is MicroFusion

  To get the precise details in the metal cast designs the process of micro fusion investment casting is used. Even the minutest details in the product design are attainable. The intricacies like – holes, slots, lettering, complex undercuts, and dimensional accuracy can be made by this process. Micro fusion Investment Casting Process  Microfusion investment casting  helps you achieve even the minutest details in the final metal products. The metal casts obtained by using this casting process have all the detailing of complex undercuts and dimensional accuracy with complete precision.  To understand the process completely here’s a brief account of the micro fusion investment casting process and how it’s done to produce high-quality casting products.  Die/Tool Preparation - A tool or die is made with the help of machines and the cavities in the tool are made in the same pattern as the original cast and after that pressurized wax is filled in this cavity to obtain ...

Unveiling the Secrets of Investment Casting Foundries: Precision, Versatility, and Quality

  Introduction Investment casting foundries are crucial in the manufacturing industry, providing precision-crafted components for various applications. In this blog, we will delve into investment casting foundries , exploring their process, capabilities, and    What is an Investment Casting Foundry?   Investment casting foundries are specialized facilities utilizing the lost-wax casting process to produce intricate, high-quality components. The process involves:   Creating a wax pattern. Coating it with ceramic. Melting the wax. Pouring molten metal into the mold. Once solidified, the ceramic mold is broken to reveal the finished product. The Advantages of Investment Casting Foundries   Investment casting foundries offer several advantages for manufacturers seeking precision and versatility. These include:   Complex Geometries: Investment casting allows for producing intricate and complex designs with minimal lim...

Know about investment Casting

  Investment casting  is one of the very old known metal making methods. It has been used in numerous forms since long many years and is always appraised for appropriator, to produce metals with multifaceted quality, exactness, replication and rectitude in varied elements and high-performance alloys. Investment casting procedure is quite uncomplicated rather simple that replicates the same pattern with wayward components to make a mould and molten matter is poured into the mould and hence it is named as investment casting. The chamber inside the mold is the desired part. The two primary investment castings methods is water glass and silica sol. Investment casting procedure is able to process complex shapes that would be nearly impossible with other casting methods. It is capable to produce products with unprecedented exterior qualities and low tolerances with slightest surface finishing  or assembling required. Investment casting  is one of the very old known metal m...