Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2754

Full Length Research Paper

Injection moulding temperature and powder loading influence to the metal injection moulding (MIM) green compact

Khairur Rijal JAMALUDIN1*, Norhamidi MUHAMAD2, Sufizar AHMAD3, Mohd Halim Irwan IBRAHIM3, Nor Hafiez MOHD NOR4 and Yusof DAUD1        
1UTM Razak School of Engineering and Advanced Technology, Universiti Teknologi Malaysia, International Campus, 54100 Kuala Lumpur, Malaysia. 2Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia. 3Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, Malaysia. 4Faculty of Mechanical Engineering, Universiti Technologi MARA, 40450 Shah Alam, Selangor, Malaysia.
Email: [email protected]

  •  Accepted: 22 August 2011
  •  Published: 30 September 2011

Abstract

The influence of temperature and powder loading on the Metal Injection Moulding (MIM) green compact is presented. The feedstock used is a mixture of stainless steel (SS316L) powder and a composite binder system consisting of polyethylene glycol (PEG) and polymethyl methacrylate (PMMA). The bi-modal particle size distribution powder has a composition of 30 and 70% by weight of fine and coarse SS316L powder respectively with a powder loading of 64 and 65% by volume. The Battenfeld BA 250 CDC injection-moulding machine was used to produce a MIMA tensile specimen. The as-moulded density was measured using the Archimedes water immersion method according to the MPIF Standard 42. The injection temperature was varied from 120 to 150°C while the injection pressure remains at 350 bars. The three-point bending test was performed using INSTRON 5567 to measure the green strength according to the MPIF Standard 15. Results showed that the bi-modal feedstock with the higher powder loading was more sensitive to temperature and that the injection temperature was less significant to the as-moulded strength and density.

 

Keywords: Metal injection moulding, bi-modal, particle size distribution, density, green strength, powder loading.

Abbreviation

MIM, Metal Injection Moulding; PEG, polyethylene glycol; PMMA,polymethyl methacrylate; SA, stearic acid