Browse > Article
http://dx.doi.org/10.6111/JKCGCT.2022.32.1.025

A study on structure of feed sprue considering turbulence and mold temperature in the investment casting process  

Lee, Jong-Rae (Department of Computer and Applied Machinery, Korea Polytechnic)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.32, no.1, 2022 , pp. 25-32 More about this Journal
Abstract
Investment casting is a production method commonly used to manufacture precision equipment, medical fields, and accessories, and has continued to develop through the modernization of equipment and high quality of materials, and its scope of use has been expanded. The purpose of this study is to minimize the defect rate by deriving structural improvement and standardization of mold temperature, which are key elements of the investment casting process, to minimize the defect rate. The scope of the study is limited to jewelry manufacturing casting processes suitable for understanding the structure and principles of small gate, and an experimental research is to be conducted by using soft Wax, gypsum powder, and 14 K gold as research materials. According to the results, the most appropriate casting standard temperature for the casting pattern of Alloy 14 k was the lowest turbulence at 980℃ flask temperature of 550℃, so good products could be produced. As a future task of this study, detailed studies are needed to data the structure and system temperature of small gate, reduce production defects in the field, and provide data for excellent investment casting competitiveness.
Keywords
Investment casting; Sprue; Liquid metal; Turbulence; System temperature; Wax tree;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y.G. Kim "Numerical analysis of an axisymmetric turbulent rotating flow in an arbitrary geometry" (Chonnam Univ., Korea, 1988) p. 36.
2 S.I. Yun, "Process analysis forprocess design of precision casting of metal" (Chungnam National Univ., Korea, 1994) p. 55.
3 J.P. Ha, "A study of investment casting process for improving of the mechanical properties" (Pukyong National Univ., Korea, 2005) p. 24.
4 J.H. Lee, "A study on quality improvement of silver jewelry in lost wax casting" (Kookmin Univ., Korea, 2015) p. 47.
5 U.J. Kim, "A study on the ornaments design using precision casting techniques" (Keimyung Univ., Korea, 2002) p. 36.
6 J.S. Lee, S.H. Jung and J.M. Bae, "The castability of new casting rings on noble and base metal alloys", KJDM, 32, Special Issue (2005) 27.
7 M.H. Guen, "A study on the technology development of investment casting using 3D printer pattern" (Pusan National Univ., Korea, 2003) p. 34.
8 G.J. Jung, "Study on the technological solution of jewelry foundry defect in alloy precious metals" (Kaya Univ. Korea, 2018) p. 42.
9 Suhas V. patankar, "Numerical heat transfer and fluid flow", American Nuclear Society, 1st Edition (CRC Press, Boca Raton, 1980) p. 196.
10 J.H. Ahn and J. N. Lee, "Study on phosphate investment for high temperature precision castings(I); The effect of particle size and distribution of silica sand on the characteristics of the investment", J. Korea Foundry Society 5 (1985) 85.