Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
권호 표지

A study on the reduction of blow hole defects in aluminum sand casting

알루미늄 사형주조에서 기공 결함 감소를 위한 연구

  • Lee, Dong-Youn (Department of Metal Mold Design Engineering, Kongju National University) ;
  • Lee, Chun-Kyu (Department of Metal Mold Design Engineering, Kongju National University)
  • 이동연 (공주대학교 금형설계공학과) ;
  • 이춘규 (공주대학교 금형설계공학과)
  • Received : 2020.12.14
  • Accepted : 2020.12.31
  • Published : 2020.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study attempted to prevent defects due to blow holes among defects of sand casting products. It was intended to reduce the defect rate by reducing the blow hole of the inner surface. Currently, expectations and requirements for the quality level of non-ferrous aluminum casting in the casting industry are increasing. In addition, the shape is complex and the shrinkage precision is required. Among them, the test prototype is expensive to manufacture the mold, and the production time is also long, and the product is manufactured by sand casting. At this time, the highest defect rates are defects caused by shrinkage defects, surface defects, and blow holes.. At this study, the manufacturing time was shortened by using the shape of the fluid movement path in advance. Also, it is possible to reduce defects due to blow holes.

Keywords

References

  1. Materials Industry Human Resource Development Committee, ISC 2019 Industry Workforce Status Report, 2019.
  2. Kim Young-sun, "A study on the temperature distribution and thermal deformation prediction of AC4C casting material for tire mold", Korean Master's Thesis Chosun University, Gwangju, 2008.
  3. J. Szekely and A. S. Jassal, Metall. Trans, Vol. 9B, p. 389, 1978.
  4. J. Cambell, Mat. Sci. & Tech, Vol. 17, p. 885, 1991. https://doi.org/10.1179/mst.1991.7.10.885
  5. Y. T. iM, "Solidification Analysis of Casting and Semi-solid Forging", Vol. 21, No. 3, pp. 155-162, 2001.
  6. Lee Jun-woo, "Experimental Study on the Effect of T6 Heat Treatment on the Mechanical Properties of Al18B4O33 / AC4CH Composites", Domestic Master's Thesis Gyeongsang National University, Gyeongsangnam-do, 1999.
  7. B. W. Cheon, "The Effect of the Metallic Mold Cooling System on the Solidification Structures and the Mechanical properties for Al alloy Casting", Dong-A University, 1994.
  8. J. H. Perepezko and S.E. Lebean, "Aluminum Transformation Technology and Application", J. of ASM, 1981.