during injection molding. It is a pervasive problem in the manufacturing of long slender
hollow parts, especially when they are thin-walled. Core deflection not only causes uneven
wall thickness, but also affects the melt flow. In this paper, an effective 3D numerical
approach is developed to simulate the flow around a cantilevered core, to calculate the
uneven pressure distribution around the core, and to predict the core deflection. Moreover …
Core deflection results from an unevenly advancing melt front around long slender cores
during injection molding. It is a pervasive problem in the manufacturing of long slender
hollow parts, especially when they are thin-walled. Core deflection not only causes uneven
wall thickness, but also affects the melt flow. In this paper, an effective 3D numerical
approach is developed to simulate the flow around a cantilevered core, to calculate the
uneven pressure distribution around the core, and to predict the core deflection. Moreover …