Metal Injection Molding: An Overview of Process and Applications
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Metal Injection Molding (MIM) mixes fine metal powders with a polymer binder, injects the feedstock into a mold, then removes the binder and sinters the part to near-full density.
Typical relative density reaches 98% or higher, with dimensional tolerances of ±0.3–0.5% and as-sintered surface roughness down to Ra 1.0 µm.
MIM is most competitive for complex-shaped, small, thin-walled parts in monthly volumes above 20,000 pieces — applications range from foldable phone hinges and watch cases to automotive gears and medical accessories.