Advantages of the MIM process

Excellent shaping possibilities

Very complex-shaped parts can be manufactured without or with only very little secondary finishing. Undercuts, which are not possible with conventional sintering processes, can be realised with MIM without problems. One particular advantage of the Parmatech process is the extremely accurate reproduction of even the finest mould cavities. The extremely flowable material also allows the forming of sharp edges.

Very good material properties

In contrast to conventional compression and sintering, which usually allows densities of 90% of the theoretical material density. The MIM process reaches densities of between 96% and 100% of the theoretical material density. Thereby, material properties are reached which largely correspond to those of parts processed entirely of metal.

Excellent surface quality

The surface of MIM parts is far superior to that of precision cast parts. A roughness height of Ra 3.2 is reached without polishing. Thereby, finishing and polishing costs can be eliminated or substantially reduced.

Low tolerance limits

The MIM process allows an accuracy of better than +/- 0.3% of the required dimensions. This means that with respect to extremely small parts, the accuracy can be in the range of hundredths of a millimetre. Calibrating, or secondary finishing may become necessary with parts of larger dimensions.

Material selection

MIM parts usually do not have to be mechanically refinished. The harder it is for a material to be machined, the more advantageous the MIM process. In particular stainless steel, soft magnetic alloys, iron/nickel materials but also tool steel and special purpose alloys can be employed. Case hardening of MIM parts is also possible without problems and is often usual. All surface treatment processes such as nickel plating, hard chroming etc, can also be applied.