Sintered Metal Parts For High Quality Medical

Metal powder injection moulding (MIM) is a new manufacturing process that combines powder metallurgy and plastic moulding processes. It involves mixing the selected powder with a binder, then granulating the mixture and injecting it into the desired shape. The polymer imparts its viscous flow characteristics to the mix, which in turn contributes to the homogeneity of the forming, cavity filling and powder loading. After forming, the binder is removed and the skimmed blanks are then sintered. Some sintered products may be subjected to further densification, heat treatment or machining. The sintered product not only has the same complex shape and high precision as a plastic injection moulded product, but also has physical, chemical and mechanical properties close to those of a forged part. This process technology is suitable for the manufacture of small, precise, three-dimensional parts with complex shapes and special performance requirements in high volume production.

Application areas for MIM technology

Typical applications
Aerospace industry: aircraft wing strands, rocket nozzles, missile tail fins, ceramic turbine blade cores;
Automotive industry: components for ignition control locks, turbocharger rotors, valve guides, components for automotive brakes, components for automotive sunscreens;

Electronics industry: disk drive components, cable connectors, electronic tube housings, computer print heads, electronic packages, heat sink materials;

Military industry: mine rotors, gun plate triggers, armour-piercing bullet cores, collimators, small arrows for cluster projectiles;
Medical devices: orthodontic brackets, internal sutures, biopsy forceps, radiation shields;
Household products: watch cases, watch straps, watch clasps, golf heads and holders, sports shoe buckles, sporting gun parts, document binders and hole punchers;

Machinery industry: shaped milling cutters, cutting tools, miniature gears;

MIM advantages

1, high degree of freedom of part geometry, one time forming production of complex-shaped metal parts;

2, MIM products have uniform density, good finish, surface roughness can reach Ra 0.80 ~ 1.6μm, weight range of 0.1 ~ 200g. high dimensional accuracy (±0.1% ~ ±0.3%), generally without subsequent processing;

3, wide range of applicable materials, wide application areas, high utilization rate of raw materials, high degree of production automation, simple procedures, continuous mass production can be achieved;

4, stable product quality, reliable performance, the relative density of products can reach 95% to 99%, can be carburized, quenched, tempered and other heat treatment. The products have high mechanical properties such as strength, hardness and elongation, good wear resistance, fatigue resistance and uniform organization;