MIM is attractive because it produces consistent, complex-geometry components for high-volume, high-strength and high-performance applications. Automation coupled with microprocessor process controls allow for the production of custom-engineered parts in large quantities while maintaining consistent quality control.

Design

Engineers apply computer-aided design technology to prepare a customer’s concepts for the MIM process.

Mold Making

Molds similar to those used in conventional plastic injection molding are designed and fabricated. CAD/CAM technology is used to enhance the design and fabrication process.

Compounding

Fine metal powders, thermoplastics and other proprietary materials are mixed to form a palletized molding compound at a typical volume ratio of 60% metal/40% binder.

Molding

Conventional injection molding machines are used to create “green parts.” These parts are typically 15-25% larger than the finished product.

De-Binding

Green parts are exposed to heat, solvent or a combination of both to remove most of the binder material. The de-bound or “brown parts” are approximately the same size as the “green parts”, but are quite porous.

Sintering

“Brown parts” are sintered in vacuum-type furnaces. The intense heat shrinks the parts 17-22% to almost complete density. The parts are then complete. Also, secondary machining or surface treatment is available.

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