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Influence of temperature to the injection molding of bimodal powder mixtures

Jamaludin, Khairur Rijal and Muhamad, Norhamidi and Ab. Rahman, Mohd Nizam and M. Amin, Sri Yulis and Abdullah, Shahrir and Hussain Ismail, Muhammad (2007) Influence of temperature to the injection molding of bimodal powder mixtures. In: World Engineering Congress 2007, 5–9 August 2007, Pulau Pinang.

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Abstract

Investigation on the influence of temperature to the injection of Metal Injection Molding (MIM) feedstock prepared with bimodal powder mixture is presented. Feedstocks used were a mixture of 19.606 and 11.225 µm stainless steel powder with composition of 30 and 70 % volume respectively mixed with PMMA/PEG and stearic acid as a binder in sigma blade mixer. Tensile specimen according to MIMA standard was injection molded with Battenfeld BA 250 CDC injection-molding machine and the as-molded density was measured with Archimedes water immersion method according to the MPIF Standard 42. The injection temperature was varied from 120 to 140 oC while the injection pressure remains at 350 bars. The three-point bend test was performed using INSTRON 5567 to measure the green strength according to the MPIF Standard 15. Results found that an injection temperature 140 oC is able to produce an acceptable compact. Also a compact with bimodal powder containing 30 % of fine powder distribution has an acceptable density and strength when injection molded at 140 oC.

Item Type:Conference or Workshop Item (Paper)
Additional Information:World Engineering Congress 2007 (2007 : Penang, Malaysia); ISBN 978-983-43571-0-8
Uncontrolled Keywords:metal injection molding, bimodal powder distribution, packing density, as-molded strength
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Others
ID Code:5666
Deposited By: Khairur Rijal Jamaludin
Deposited On:23 Jun 2008 00:23
Last Modified:01 Jun 2010 15:33

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