MIM技术介绍(国外英文资料).doc

MIM技术介绍(国外英文资料) MIM technology introduction First, the concept of MIM and process Metal powder injection molding technology is the combination of the traditional powder metallurgy technology and plastic injection molding, is a revolution of small complex parts forming process. It will apply the technology of powder and adhesive evenly mixed into feed with rheology in injection machine, injection molding, the blank after degreasing Sintering Densification for the finished product, can also postprocessing when necessary The production process is as follows Proportioning, mixing, granulating, injection molding, chemical extraction, debonding and sintering temperature, postprocessing and product Two, the characteristics of MIM Technology By combining the advantages of powder metallurgy and plastic injection molding technology of two metal powder injection molding process, breaking the limit on the product shape forming traditional metal powder moulding, and the use of plastic injection molding technology to large scale and high efficiency production of parts with complex shapes such as: external grooving, external thread, conical outer surface cross holes, blind holes, concave, pin, stiffener, surface knurling The advantages of MIM Technology The geometry of complex parts forming A. directly, usually weight 0.1~200g B. good surface smoothness, high precision, tolerance is + 0.05mm typical C. alloy has good flexibility, suitable for a wide range of materials, product density is 95%~99%, the internal organization of uniform, no internal stress and segregation D. production and high degree of automation, no pollution, can realize continuous large quantities of clean production Comparison of MIM and precision casting forming ability The characteristics of precision casting MIM The pore diameter of 2mm 0.4mm The diameter of 2mm blind maximum depth 2mm 20mm The minimum wall thickness of 2mm 1mm The maximum wall thickness limit 10mm 4mm + 0.2mm + 0.05mm diameter tolerance The