The metal injection moulding process

The metal injection moulding process

This is how the metal injection moulding (MIM) process works

The metal injection moulding (MIM) process includes three steps: mixing of feedstock, moulding and sintering.

In the MIM process, metal powders and a binder system are combined to produce the feedstock. The binders can consist of polymers such as wax and polypropylene.

The feedstock is moulded into a “green part,” cooled and ejected from the mould.

In the next phase of the metal injection moulding process, the binder material is removed while the part is sintered to a solid shape. Sintering heats the powder to temperatures near the melting point to densify the particles. Diffusion rates are high, which lead to high shrinkage and densification.

The cost benefits of metal injection moulding applications lie in complexity of geometries in combination with high volumes of small-size parts (typically less than 50 mm).

MIM process

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