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An Influence of SS316L’s Particle Shape to the Injection Molding of Composite Binder Feedstock

Jamaludin, K. R. and Muhamad, N. and Ab. Rahman, M. N. and Amin, S. Y. M. and Ahmad, S. and Ibrahim, M. H. I. and Murtadhahadi, I. and Nor, N. H. M. (2008) An Influence of SS316L’s Particle Shape to the Injection Molding of Composite Binder Feedstock. In: Confederation of ASEAN Engineers Organization Conference 2008 , 26-29 November 2008, Bangkok, Thailand.

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Abstract

Metal injection molding (MIM) has emerged as a viable method of producing complex shaped parts at a competitive cost. The MIM process uses a combination of powder metallurgy and injection molding technologies to produce net-shape parts and comprising of five main sub processes: raw materials selection (powder/binder), feedstock preparation, injection molding, debinding, and sintering. One of the advantages of MIM is its ability to produce parts with complex geometry without machining. However, most of the MIM parts are produced with fine and spherical shaped metal powder (gas atomized), which is expensive in cost. Thus, this paper presents an investigation to study the particle shape’s influence to the injection molding performance as well as the green body characteristics. The investigation is vital because the author attempts to seek a possibility of minimizing the production cost by substituting such existing metal powders with nearly spherical but still irregular shaped metal powder. The investigation begins with a rheological properties of the feedstock followed with the green body characteristics, and finally ends with analysis of variance of the processing parameters that influences the green strength and green density. The investigation discovered that the green characteristics of the green body produced with water atomized feedstock are satisfactory as its green characteristics are the equivalent as the one produced with gas atomized feedstock.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Metal injection molding, Particle shape, Gas atomized powder, Water atomized powder
Subjects:T Technology > TS Manufactures
Divisions:Mechanical Engineering
ID Code:7050
Deposited By: Khairur Rijal Jamaludin
Deposited On:30 Dec 2008 13:50
Last Modified:01 Jun 2010 15:49

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