Process introduction
MIM (Metal Injection Molding), short for metal injection molding, is a new technology for metal parts manufacturing developed by combining powder metallurgy and plastic molding technology, which combines plastic injection molding technology, polymer science, powder metallurgy technology and metal A new type of near-net forming technology for metal parts in materials science. It not only inherits the advantages of traditional powder metallurgy and plastic injection molding, but also breaks through the limitations of traditional metal powder molding in the shape of parts. It can quickly manufacture parts with small size and complex shape that cannot be processed or difficult to process using traditional methods.
Process flow
MIM technology consists of four main processes:
① Mixing and granulation of powder and binder;
② Injection molding by injection molding machine;
③ Select proper degreasing process for degreasing;
④ Sintered parts make it dense.
Advantages of MIM molding
MIM technology has parts with simple process, low cost, no cutting or less cutting, high economic efficiency, high density, good mechanical properties, small surface roughness, and can also produce parts with complex structures in large quantities and efficiently, generally There is no need to continue finishing, the cost of parts is reduced, and it overcomes many shortcomings of traditional powder metallurgy, cutting, and investment casting.
Technology application
1. Computer and its auxiliary facilities: such as printer parts, magnetic core, striker pin, drive parts;
2. Tools: such as drills, cutter heads, nozzles, gun drills, spiral milling cutters, punches, sleeves, wrenches, electrician tools, hand tools, etc .;
3. Household appliances: such as watch cases, bracelets, electric toothbrushes, scissors, fans, golf club heads, jewelry links, ballpoint pen clamps, cutting tool heads and other parts;
4. Parts for medical machinery: such as orthodontic brackets, scissors, tweezers;
5. Military parts: missile tail, gun parts, warheads, medicine cover, credit parts;
6. Parts for electrical appliances: electronic packaging, micro motors, electronic parts, sensor parts;
7. Mechanical parts: such as loose cotton machine, textile machine, hemming machine, office machinery, etc .;
8. Automobile and ship parts: such as clutch inner ring, fork sleeve, distributor sleeve, valve guide, synchronization hub, airbag parts, etc.