Introduction and comparison of MIM injection process
Date：[2014/6/30]
First, the concept and process of MIM
Metal powder injection molding is a new technology combining traditional powder metallurgy technology and plastic injection molding, is a revolution of small complex parts forming process. Technology of powder and binder, it will apply evenly mixed into feed with rheology, in the injection molding machine injection molding, the blank after degreasing Sintering Densification is finished, can be carried out after the treatment is necessary
The production process is as follows
Batching, mixing, granulation, injection forming, chemical extraction, high-temperature debonding → sintering → after treatment, the finished product
Second, the characteristics of MIM Technology
By combining the advantages of powder metallurgy and plastic injection molding technology of two metal powder injection molding, break through the restrictions process in product shape on the forming of traditional metal powder moulding, and the use of plastic injection molding technology to mass, high efficiency production parts with complex shapes: such as various external cutting, thread, conical outer surface through holes, blind holes, cross, concave, a key pin, reinforcing rib plate, surface knurling
Advantages of MIM Technology
The geometry of complex parts A. direct forming, usually weight 0.1~200g
B. good surface finish, high precision, typical tolerance of ± 0.05mm
C. alloy has good flexibility for a wide range of products, materials, the density of 95%~99%, the internal organization of uniform, no internal stress and segregation
D. production of high degree of automation, no pollution, and can realize continuous mass of cleaner production
Comparison of MIM and precision casting forming ability
Comparison of MIM with other forming process
Third commonly used materials, MIM
The basic properties of fourth, several kinds of MIM materials
Fifth, MIM products are typical applications
Aerospace Industry: the wing hinge, rocket, missile tail nozzle, turbine blade core
The automotive industry: the airbag module, ignition control lock parts, turbocharger rotor, seat parts, brake parts
Electronic industry: disk drive components, connectors, electronic package, mobile phone, computer print head vibrator
The military industrial: Mine rotor, a trigger of the gun, sabot heart, quasi constellation, flechette cartridge.
Daily necessities: watchcase, strap, buckle, golf head and the ball seat, sewing machine parts, electric toy parts etc.
Machinery industry: shaped milling cutter, cutting tools, electric tool parts, gear, hinge etc.
Medical devices: orthopedic rack teeth, scissors, tweezers, operation knife
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