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Metals 2017, 7(4), 130; doi:10.3390/met7040130

Heating System for Riser Size Minimizing in Sand Casting Process and Its Experimental Verification

1
School of Mechanical Engineering, Kyungnam University, 7 Kyungnamdaehak-ro, Masanhappo-gu, Changwon-si, Gyeongsangnam-do, 51767, Korea
2
Global Core Research Center for Ship and Offshore Plants (GCRE-SOP), San 30 Chang Jun-dong, Geum Jung-Gu, Busan 46241, Korea
3
School of Mechanical Engineering, Pusan National University, San 30 Chang Jun-dong, Geum Jung-Gu, Busan 46241, Korea
*
Author to whom correspondence should be addressed.
Received: 28 February 2017 / Revised: 26 March 2017 / Accepted: 4 April 2017 / Published: 8 April 2017
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Abstract

In the conventional sand casting process, the size of the riser is made larger than that of the cavity (product part) in order for the molten metal in the riser to solidify at a later stage than the molten metal in the cavity. In this study, a continuous heating method is developed and applied to the riser, using a cylindrical heater, to minimize the size of the riser. A mold having four cavities is designed for casting turbine housings. The height and diameter of the riser are chosen to be 80 mm and 20 mm, respectively. Solidification analysis results, using the analysis program MAGMA soft for casting simulation, showed that when the heater is implemented, the riser is the last to solidify. However, without the heater, the riser solidifies before the cavity, thus causing the riser to function improperly. Moreover, misruns are generated in the casted product if the heater is not implemented, as opposed to the case of a solid product without any defects, with the heater attached in the riser. View Full-Text
Keywords: riser; sand casting; gate system; ductile cast iron; casting simulation riser; sand casting; gate system; ductile cast iron; casting simulation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jin, C.K.; Seo, H.Y.; Kang, C.G. Heating System for Riser Size Minimizing in Sand Casting Process and Its Experimental Verification. Metals 2017, 7, 130.

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