Experimental Study of Lost Foam Casting

T. Siva Prasad *, M. Devaiah **
*-** Department of Mechanical Engineering, Geethanjali College of Engineering and Technology, Telangana, India.
Periodicity:May - July'2018

Abstract

In lost foam casting process, polystyrene beads are heated to foam and the required pattern is made by polystyrene foam, which is then coated with refractory and placed in a flask backed up with un-bonded sand. The molten metal poured, takes the shape of foam pattern by evaporative action of foam. Whereas in conventional sand casting, a wooden pattern is used to create mold cavity and the cavity is filled with molten metal to get the final shape of casting. In this paper, an experimental analysis was done on lost foam casting process and compared with sand casting processes. The main objective of this study is to investigate and compare the physical parameters like dimensional accuracy, surface finish, and quality of the final product obtained from lost foam casting process and sand casting process. The results from both the processes are observed and compared to find the accurate and precise process among the two processes.

Keywords

Lost Foam Casting (LFC), Expandable Polystyrene (EPS), Polymethyl Methacrylate (PMMA), Polyalkylene Carbonate (PAC) Permeability, Pyrolysis, Synthetic Mullite(3Al2 O3 , 2Si02).

How to Cite this Article?

Prasad, T. S., Devaiah, M. (2018). Experimental Study of Lost Foam Casting. i-manager’s Journal on Future Engineering and Technology, 13(4), 46-52.

References

[1]. AutoCAD (n.d). In Wikipedia. Retrieved from https://en.wikipedia.org/wiki/AutoCAD
[2]. Hill, M. W., Lawrence, M., Ramsay, C. W., & Askeland, D. R. (1997). Influence of gating and other processing parameters on Mold Filling in the LFC Process (AFS Research). Transactions of the American Foundrymen's Society, 105, 443-450.
[3]. Lawrence, M. D., Ramsay, C. W., & Askeland, D. R. (1998). Some observations and principles for gating of lost foam castings. In One Hundred Second Annual Meeting of the American Foundrymen's Society (pp. 349-356).
[4]. Liu, X. (1995). The mechanisms of mold filling and casting defect formation in the lost foam casting process. AFS Transaction, 86, 635-642.
[5]. Mehta, S., & Shivkumar, S. (1994). Thermal degradation of foamed polymethyl methacrylate in the expendable pattern casting process. Journal of Materials Engineering and Performance, 3(3), 329-333.
[6]. Mehta, S., Biederman, S., & Shivkumar, S. (1995). Thermal degradation of foamed polystyrene. Journal of Materials Science, 30(11), 2944-2949.
[7]. Molibog & Vitalyevich. T (2002). Modeling of metal/pattern replacement in the lost foam casting process. Dissertation Abstracts International, 63(05), 2539.
[8]. Reynolds, J. H., Chelazzi. L., & Desimone, R. (1999). Competitive mechanisms subserve attention in macaque areas V2 and V4. The Journal of Neuroscience, 19(5), 1736-1753.
[9]. Shivkumar, S. (1994). Modelling of temperature losses in liquid metal during casting formation in expendable pattern casting process. Materials Science and Technology, 10(11), 986-992.
[10]. Shivkumar, S., & Gallois, B. (1987). Physico-chemical aspects of the full mold casting of aluminum alloys, part I: The degradation of polystyrene. AFS Transactions, 95, 791-800.
[11]. Shroyer, H. F. (1958). Cavity-less Casting Mold and Method of Making Same. U.S. Patent No. 2,830,343.
[12]. Tseng, C. H., & Askeland, D. R. (1991). A study of selected process parameters for the evaporative pattern casting process. AFS Transactions, 99, 455-464.
[13]. Wall, M. E., Rechtsteiner. A, & Rocha, L. M. (2003). Singular Value Decomposition and Principal Component Analysis. In Berrar, D. P., Dubitzky, W., & Granzow, M. (Eds.), A Practical Approach to Microarray Data Analysis (pp. 91- 109). Kluwer: Norwell, MA.
[14]. Warner, M. H., Miller, B. A., & Littleton, H. E. (1998). Pattern pyrolysis defect reduction in lost foam castings. Transactions of the American Foundrymen's Society, 161, 777-786.
[15]. Yao. D, A. (1994). Expropriation and inventions: Appropriable rents in the absence of property rights. American Economic Review, 84(1), 190-209.

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