History & Modernization

Investment Casting, also widely known as the 'Lost Wax Process', is supposedly the mostancient mode of manufacturing metal parts. As old as about 5000 years ago, in the timeof the Pharaohs, it was used by the Egyptians to make gold jewelry (Therefore the name'Investment').Thus, a Mould, also called as a Cast is created which can then be filled with the molten metal.

About 100 years ago, the use of the Lost Wax process was discovered and applied for Dental inlays and later also for Surgical Implants. The process, as versatile as this, promises casting of intricate shapes with high accuracy. And therefore, is used to manufacture parts ranging from turbocharger wheels to golf club heads, from electronic boxes to modish replacement implants. Additionally, metals which are hard to machine or fabricate otherwise, stage as good contenders for this process. The process capable of making parts that cannot be produced by normal manufacturing techniques is therefore utilized to manufacture turbine blades that have complex shapes, or airplane parts that have to withstand high temperatures. manufacture turbine blades that have complex shapes, or airplane parts that have to withstand high temperatures.

Amidst all this, the attention however, was turned to this process when there felt a need to manufacture accurately shaped blades. It was the solution of the four key problems that entitled the process to take all the credit:
1. Castings had to be reproducible within close dimensional limits
2. Castings had to be produced in high melting point alloys
3. There had to be high standards of metallurgical quality
4. Costs had to be lower than for alternative techniques

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