Effect of Core Geometry, Orientation and Support on the Core Shift in Mould

Abstract

Abstract: This paper focuses on how to improve the effect of core geometry and its orientation when core shift occurs in the mould. Core shift is the change in position of the core from its original position in the mould before the molten fluid is passed into the cavity. Core shift occurs due to the temperature difference in the mould box and the pressure induced on the side walls of the mould box. Thus, the final product will have unexpected and uncountable variations and defects which will have a huge impact on the mechanical properties which in turn will affect the performance when running an operation. Also, the design and analysis of the final product will give an estimation on the various stresses acting on the core and how it will eventually affect both the mould and the core during the casting process. The problem of core shift has been resolved and the results obtained from the correction, have made an impact on the small foundries which usually do not operate in a systematic way. Thus, the goal of minimal to absolutely zero core shift can be achieved and the new final product will have more advantages compared to the old product with defects. Keywords: Core shift, Cavity, Knuckle joint, Fork end, Sand casting, Core, Mould.