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Metal Injection Molding

A reliable source for Metal Injection Molding information and leading Metal Injection Molding Companies & Manufacturers.

It combines the way injection molded plastics are formed with powdered metal sintering to create metal or ceramic parts which are stronger, denser and more capable of complex geometric shapes than most forged or die cast metal parts. Read More…

Metal Injection Molding Metal injection molding, also called MIM, is a low cost, high volume manufacturing process that produces custom metal parts near to net shape.
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Leading Manufacturers

St.Marys , PA  |  814-781-7004

Catalus Corporation is a leading manufacturer of powder metal parts. Our products include parts used in the automotive, marine, heavy truck, lawn and garden, and recreational vehicle markets. We work with a variety of materials like iron, stainless steel, brass and bronze. Our research and development is done at our Galeton, PA facility and we offer strong engineering support and design assistance to our customers. We are registered to both the IATF-16949:2016 and ISO 9001:2015 standards.

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Catalus Corporation $$$

Tulsa, OK  |  918-663-7511

Since 1967, PSP has been a leader in small, intricate custom powdered metal parts for a wide range of industries, such as Sports & Recreation, Power Tools, Industrial Equipment, Oil & Gas.

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Precision Sintered Parts $$$

Los Angeles, CA  |  888-663-8256

Our metal injection molding cannot be topped! We have years of field industry experience that we want to put to work for you. It is our mission that we will be able to offer high quality customer service as well as products that will withstand the tests of time to provide lasting value. For more information on what we may be able to do for you, get in touch with our customer service department today!

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PSM Industries $$$

Sykesville, PA  |  814-894-2461

As a powder metal specialist, we will gladly consult with you about any gears, pulleys and sprockets you need. Symmco makes sintered stainless parts: cams, food processing machinery parts, gears, structural components. In inventory: SAE 841-sintered bronze, bearings, cored and solid bar, rectangular plate. We have a capacity of 5 tons through 750 tons. Contact us today to learn more about our capabilities.

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Symmco Incorporated $$$

Garden Grove, CA  |  714-898-9151

With over 30 years of experience, Poly Processing Company has become a leading manufacturer of rotationally molded poly tanks, plastic storage tanks, chemical tanks, double wall tanks, chemical storage tanks and miscellaneous tanks. We offer cost effective solutions to your plastic tank needs.

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Synertech P/M, Inc. $$$
placeholder image Catalus Corporation Precision Sintered Parts PSM Industries Symmco Incorporated Synertech P/M, Inc.

Metal injection molding, also called MIM, is a low cost, high volume manufacturing process that produces custom metal parts near to net shape. The process creates metal or ceramic parts which are stronger, denser and more capable of complex geometric shapes than most forged or die cast metal parts. A relatively new invention in manufacturing, metal injection molding combines the flexibility of the injection molding process with the strong structural integrity of sintered powdered metal.

The strength, economy and capacity for complex shapes demonstrated in injection molded metal and ceramic parts are sought-after attributes and are becoming more widely utilized by telecommunications, automotive, medical and dental instrumentation, industrial parts, orthodontics, firearms, hardware and lock components, computer and electrical application industries, among many others. Injection molded metal parts are formed from sintered powdered metal, as are regular powdered metal parts. The powdered metal or ceramic powder used in the injection molding process must, however, become plasticized in order to flow through the injection molding machine.

Metal Injection Molding Metal Injection Molding - Perry Tool & Research, Inc.

called binders or wax are added to the powdered metal base, creating what manufacturers call "feedstock". The feedstock pellets are fed through a hopper into a screw conveyor where they are sheared and friction heated until the material becomes malleable, then it is extruded into a closed die at the screw conveyor's opposite end. The tools used here range from simple designs to multi-cavity molds. The molded part is allowed to cool until it has solidified, then it is ejected and the mold is filled again. These molded but not yet sintered parts are called green parts.

The polymers of these parts must be extracted through a process called debinding. Debinding can be done chemically (as through a solvent bath) or thermally, and sometimes the sintering process is even sufficient to break down green parts' polymers, dissipating them during the sintering process. Green parts are sintered between 2200 and 2550 degrees Fahrenheit and shrink in the process as the pores where polymers were close, creating densities between 95 and 98%, almost as high as that of wrought metals. This is done in a high temperature sintering oven. Despite the shrinking, closer and more accurate tolerances can be achieved with injection molded metals than with die-casting or forging.

Metal powder parts which must be cast or forged in multiple pieces can often be molded and sintered as a single part, cutting down on expensive secondary assembly processes such as drilling, etching or assembling.. Other post-processing operations like machining, heat treating or plating take place at this time to enhance properties and reach higher tolerances. Resin impregnation is an example of a process used to enhance the lifespan of porous metal products.

Ferrous-based alloys are most commonly used in metal injection molding, as well as low alloys, stainless steels, copper, chrome, nickel alloys, semimetals, intermetallic compounds and magnetic ceramics. The densities injection molded metals achieve not only give parts much higher strength, but also higher corrosion resistance and, for magnetic compounds, improved magnetic qualities. Although some short runs may still be more economical than die-casting or forging, injection molded metals are usually manufactured in long runs to balance high overhead mold tooling costs.

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