The Impact of Pre-Heating on Pressure Behavior in Tapered Cylindrical Die in Pultrusion of Large-Sized Composite Rods

Abstract

A mathematical model to describe the pressure distribution in a thermoset large-sized composite rod as it travels through the pultrusion die is developed on the basis of Darcy’s law. A finite-difference method is employed to solve the governing equations of three-dimensional axis-symmetric cylindrical die geometry. The influence of pre-heating on pressure rise inside a cylindrical die inlet is investigated. The present model may be utilized to obtain the optimal linear taper angle for die inlet and process conditions to achieve maximum possible pressure rise in the die inlet.

Investigation of closed compartment moulding for pull-winding process

“…The models have been established on soil science that assumes a pressure gradient across vertical and horizontal direction of the laminate. Grigoriev et al [11] have assumed the pressure gradient to be linear while few others have considered it to be nonlinear [12][13].…”