Assessment of the efficiency of using blind feeders of various designs based on mathematical simulation results

Abstract

The actual location of shrinkage defects in variously designed feeders is considered. The method of estimation of variously designed feeders’ effectiveness is proposed on the basis of mathematical modeling results. Characteristics of shrinkage defects location in feeder volume are proposed to use for estimation of feeders effectiveness. The calculation of the feeders’ effectiveness of equal size but having differently designed top part is shown. The introduced efficiency index has a good adjustment with relation between volume and surface of feeder (V/S). Increasing feeder V/S increases its thermal efficiency. It is shown that the use of a notch allows to increase feeder efficiency. The explanation of mechanism of notch thermal behavior and its influence on shrinkage defects location is offered on the basis of analysis of isothermal lines in feeder cross section. Recommendations towards maximization of casting yield due to the change in feeder top part design are substantiated.