Abstract: It is important for the quality of tire products to ensure the velocity uniformity of tire compounds along the width at the outlet of flow channel during extrusion. In order to investigate the influential factor of the velocity uniformity based on the optimized flow channel structure, the velocity, wall shear stress, and pressure fields are analyzed by a numerical simulation with CFD software Fluent. It showed that the velocity uniformity at the outlet was influenced by the viscosity and pressure of the tire compounds, but hardly affected by the change of temperature.

Key words: tire compound, velocity uniformity, outlet of flow channel, numerical simulation