The definition of investment casting
September 29th, 2009
What is investment casting?
Investment Casting is also known as the lost wax process. This
process is one of the oldest manufacturing processes. The
Egyptians used it in the time of the Pharaohs to make gold jewelry
(hence the name Investment) some 5,000 years ago. When beeswax
formed the pattern, to today’s high-technology waxes, refractory
materials and specialist alloys, the casting allow the production of
components with accuracy, repeatability, versatility and integrity in
a variety of metals and high-performance alloys. Lost foam
casting is a modern form of investment casting that eliminates
certain steps in the process.
The process is generally used for small casting, but has produced
complete aircraft door frames, steel casting of up to 300 kg and
aluminium casting of up to 30 kg. Intricate shapes can be made with
high accuracy. In addition, metals that are hard to machine or
fabricate are good candidates for this process. It can be used to
make parts that cannot be produced by normal manufacturing
techniques, such as turbine blades that have complex shapes, or
airplane parts that have to withstand high temperatures.
There are many kinds of investment casting.
