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Investment casting is the process of making a wax pattern using a die. Many identical wax patterns are mounted together on an assembly. Next the assembly is given a coat of stucco, followed by coarser coats of stucco. Then the wax is removed, leaving a ceramic shell. Then molten metal is poured into the shell. Finally, after cooling, the shell is removed, leaving many finished metal parts. It's a very efficient method of producing parts and will save one a lot of money.

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Investment casting, also known as lost wax casting or precision casting, is a process that has been practiced for thousands of years, with the lost wax process being one of the oldest known metal forming techniques. Due to the complex structure in dimension and geometric, the investment castings are produced to reach net shape or near net shape, minimizing the need for secondary processes such as lathing, turning or other CNC machining process. Investment casting is a manufacturing process that can be traced back over 5,000 years ago. From then, when beeswax formed the pattern, to today's high technology waxes, refractory materials and special alloys, the lost wax casting ensure high-quality components are produced with the advantages of accuracy, repeatability, and integrity. Investment casting derives its name from the fact that the pattern is invested, or surrounded, with a refractory material. The wax patterns require extreme care for they are not strong enough to withstand forces encountered during the mold making.


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