Comparative characteristics of MIM technology and other processing technology

MIM feedstock powder size used in the 2-15μm, while the original powder metallurgy powder size mostly in the tradition 50-100μm. Finished high density MIM process, because the use of a fine powder. MIM process has the advantages of traditional powder metallurgy process, and high degree of freedom in shape is the traditional powder metallurgy can not be achieved.

Traditional powder metallurgy limited strength and packing density of the mold, mostly two-dimensional cylindrical shape traditional casting off the dry process production of complex shape of the product as a very effective technique, in recent years the use of ventricular assist pottery can be done slit deep hole The finished product, but because of the strength of the pottery of the heart, as well as casting liquid liquidity constraints, the process still has some technical difficulties.

In general, this process of manufacturing large and medium-sized parts more appropriate, small and complex shaped parts MIM process is more suitable places. Comparison Project MIM manufacturing process of traditional powder metallurgy process powder particle size (μm) 2-1550-100 relative density (%) 95-9880-85 Product weight (g) of less than or equal to 400 g 10- Hundreds of three-dimensional shape of the product of complex shape Simple mechanical properties of two-dimensional shapes and compare the merits of MIM process die-casting process using conventional powder metallurgy aluminum and zinc alloy low melting point, good fluidity casting liquid material. The product of this process due to material limitations, its strength, wear resistance, corrosion resistance are limits.

Historical origin MIM technology

California Parmatech invented in 1973 in the early 1980s in many European countries and Japan have invested great effort began to study the technology, and the rapid promotion. Especially in the mid-eighties, but get this technology to achieve rapid industrialization since the development are increasing at an alarming rate every year. So far, the United States, Western Europe, Japan and other countries and regions, more than 100 companies engaged in the technology of product development, research and marketing.

Japan in the competition is very positive, and outstanding performance, many are involved in the promotion of large-scale Corporation MIM industry, these companies include Pacific Metals, Mitsubishi Steel, Kawasaki Steel, Kobe Steel, Sumitomo Mining, Seiko - Epson, Datong Special steel. Japan currently has more than forty companies specialized in the MIM industry, the total value of its sales of industrial products, MIM has already exceeded catching up with Europe and the United States.

So far, the world has the technology hundred companies engaged in product development, research and sales work, MIM technology has thus become the most active of the new cutting-edge manufacturing technology, is the world's pioneering technology metallurgical industry, representatives the main direction of the MIM process powder metallurgy technology.

Metal powder injection molding technology is a set of plastic molding technology, polymer chemistry, powder metallurgy technology and metal materials science and other disciplines through the cross product of injection molding using a mold can be blank and rapid manufacturing by sintering high-density, high-precision , three-dimensional structure of a complex shape parts, can be quickly and accurately design ideas materialized into a certain structure, functions and features of products and direct mass-produced parts, the manufacturing technology industry a new revolution.

The technology not only has the less conventional powder metallurgy process steps, no cutting or less cutting and economic advantages, but also to overcome the traditional powder metallurgy technology products, non-uniform materials, low mechanical performance, easy molding of thin-walled, complex structural shortcomings, particularly suitable for mass production of small, complex and metal parts with special requirements. Process binder → mixing → injection molding → degreasing → → after sintering process.