Posts Tagged 'design guide'

Metal Injection Molding: Design Guide from Kinetics


Despite all the advancements in polymer chemistry, some times metal is the only material that will do the job. And, sometimes machining individual metal parts one-by-one isn’t practical. Metal Injection Molding (MIM or sometimes called PIM: Powder Injection Molding) is just what it sounds like: injection molding metal… The material is shot in standard plastic injection molding machines and molds. To make the metal moldable, metal power is combined with a polymer (plastic) binder and shot at normal plastics injection molding temperatures.

But, due to the presence of the polymer binder, mold cavities are designed approximately 20% larger than the final part size. After molding, green parts are sintered at temperatures up to 2,600°F. At those temperatures, the polymer binder breaks down and dissipates while the metal particles retain all of the molded features. The metal particles fuse together during sintering and the part shrinks approximately 20% to form a solid metal part.

Kinetics has a really nice design guide to give you an overview of how to design parts for MIM. You can download it as a PDF (accessible from the home page), or you can view it in an interactive flash presentation.

IDSA Ecodesign Section


Fellow Professional Interest Section, the IDSA Ecodesign Section supports the development of products, places and service systems that minimize damage to and restore the health of our natural environment. From their page on the IDSA web site:

Design can enable people to meet our needs without destroying the natural world. Ecological design can reduce costs, improve system usability, and inspire people to act for the benefit of our natural environment and the quality of life of human society in the future. It is the design challenge of our generation.

In addition to the expansive list of links including a great collection of materials suggestions, the Ecodesign Section offers designers the Okala Design Guide:

Co-developed by Philip White (founder of the Ecodesign Section), Louise St. Pierre and Steve Belletire and sponsored by Eastman Chemical, Whirlpool and an IDSA/EPA Partnership, the Okala Design Guide provides an introduction to ecological and sustainable design for practicing and beginning designers. The course modules were designed to be easy to integrate into existing design education classes. Over 60 design schools in North America requested the Okala materials.

Please take the time to check out all the great resources collected by the Ecodesign Section.