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As shown in this MIM schematic, metal powders are blended and mixed with a polymer and additives.

Then they are processed on conventional injection molding machines used for thermoplastic materials into so-called green parts. The polymers serve as a binder that allows the metal powders to be injection-molded. The binder is removed from the green parts in a continuous process under a highly defined and controlled temperature-time profile. Subsequently, the parts are sintered to their final density.

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MIM Design Guidelines
MIM Materials/Applications