Investment Casting

Investment casting got its name from the technique utilized by the Egyptians over 4,000 years ago to produce jewelry. Since gold is an investment, casting gold can be considered investment metal casting. Precision casting is used to produce jewelry and high-precision parts. Investment metal casting aluminum structures can have a wall dimension of less than a millimeter (0.40 to 0.75 mm) or up to several inches.

Investment metal casting can produce items in sizes and shapes that cannot be made by other metal casting methods. During the Second World War a huge demand for precision casting developed to furnish the jet propulsion systems in airplanes. Investment casting of mechanical parts later found its way to civilian aircraft.

Can Produce High-Precision Mechinical Parts

Since the invention of the jet engine, there has been increased interest in precision casting by the aerospace industry. It is reliable for its ability to produce accurate dimensional, high-precision casting parts. Increased resistance to corrosion and lower maintenance costs are the hallmarks of aluminum alloy metal casting. This type of casting can produce high-precision mechanical and engineering parts quickly and in large quantities.

Can Produce High-Precision Mechinical Parts

The process of investment precision casting is very simple. Plaster slurry is applied to a design formed from a fusible substance like wax. As the plaster bakes, the wax melts out. The name "lost-wax casting" is a perfect description of the process. The internal cavity thus formed is the shell or mould for the aluminum casting. The molten aluminum is poured into the cavity. After cooling, the external mold is broken and the casting is retained.

Offers the Greatest Design Flexibility

Investment casting has many advantages. It is a very versatile process and produces a wide range of products for a variety of industries. It allows the selection of suitable alloys, such as aluminum alloys. Investment precision casting offers the greatest design flexibility for producing complex structures. This flexibility cannot be found in other metal casting methods. This allows the engineers and designers to concentrate on the functional aspect of the part rather than its manufacture.

For more information about Investment Casting and Precise Dimensional Control

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