Comparison between investment casting (lost wax process) and M.I.M. (Metal Injection Moulding) technology

Precision ± 0.8 % nominal dimension ± 0.5 % nominal dimension
Costs for mould/tooling construction ex: 2500 ex: 7500
Surface finishing (Ra) 3.2 1.6
Range of alloys nearly unlimited Minor
nearly unlimited
medium-high very high
Weight 5 Kg max 70 grams max

Investment casting came into use as a modern industrial process in the late 19th century, when dentists began using it to make crowns and inlays, as described by Dr. D. Philbrook of Council Bluffs, Iowa in 1897. Its use was accelerated by Dr. William H. Taggart of Chicago, whose 1907 paper described his development of a technique. He also formulated a wax pattern compound of excellent properties, developed an investment material, and invented an air-pressure casting machine.

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