An experimental investigation of the cooling and heating performance of a gravity die casting mold with conformal cooling channels


Kurtuluş K. , Bolattürk A. , Coşkun A. , Gürel B.

APPLIED THERMAL ENGINEERING, vol.194, no.117105, pp.1359-4311, 2021 (Journal Indexed in SCI Expanded)

  • Publication Type: Article / Article
  • Volume: 194 Issue: 117105
  • Publication Date: 2021
  • Doi Number: 10.1016/j.applthermaleng.2021.117105
  • Title of Journal : APPLIED THERMAL ENGINEERING
  • Page Numbers: pp.1359-4311

Abstract

In the gravity die casting process, cooling directly affects the unit cost and microstructure quality of casting

products. In the conventional manufacturing methods, cooling channels in gravity casting molds are usually

produced linearly in circular profiles. When cooling is not conformal, molding defects such as hot spots and

distortions form in the products. This study investigated the effects of cooling channels on the casting steps and

final properties of the products in standard and conformal cooling gravity die casting molds. Numerical analysis

results were compared with the experimental data and then were verified. The pressure losses in cooling

channels, the times for molds to reach the required temperature and the cycle times were all measured. The

pressure losses in standard and conformal cooling channels were measured at 5250 Pa and 12100 Pa, respectively.

In addition, a more homogeneous mold surface temperature distribution was achieved in the conformal

cooling mold, as well as a 28% shorter cycle time. The average particle size of the parts cast with conformal

molds was 13.5% smaller than those cast with standard molds. Finally, the mechanical properties of the parts

cast with conformal cooling channel molds were found to be better than those cast with standard channel molds.