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A Study on the Development of Micro Metal Gear with Outer Diameter of 500um Using MIM Process

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Abstract:

At present there are many studies that are carried out to develop micro parts. A micro drive unit assembled with several micro movable parts is needed to industrialize the functional micro parts such as micro pump, micro-chip, micro motor, and micro gear. In this study, a powder injection molding process was used in making micro metal gear with outer diameter of 500um. To make micro metal parts, it necessary to create micro shape cavities and cores for the filling of feedstocks. To make micro shapes or patterns, there are several methods to choose such as LIGA, laser machining, micro etching, and micro milling. But these micro methods are expensive and need some special facilities to fabricate. So in this study, conventional machining methods were tested to make micro gear cavity shapes. The preliminary studies were conducted to evaluate the filling of cavity and the EDM machining. Finally micro gear with outer diameter of 500um was injection molded, de-binded, and sintered. Some incomplete fillings occurred at the end of filling gear teeth using 17-4PH 3F feedstock. The final sintered micro metal gear showed about 434um of outer diameter.

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Periodical:

Applied Mechanics and Materials (Volume 267)

Pages:

25-28

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.267.25

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Online since:

December 2012

Authors:

Young Moo Heo, Kwang Ho Shin, Jong Deok Kim

Keywords:

17-4PH 3F Feedstock, Micro Metal Gear, MIM Process, Outer Diameter, Stainless Steel Powder

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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References

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