Uniformity of flow from sheeting dies

Abstract

Abstract A numerical method for analyzing the uniformity of flow from sheeting dies is presented. The method assumes that the flow is isothermal and that the material is a power law fluid. A uniformity index is defined and methods are presented which enable die dimensions to be established which will result in a specified uniformity at particular flow rates and pressure drops. The analysis shows that the flow index “ n ” of the power law is the key parameter determining the uniformity of flow from a sheeting die.