A new barrier screw design utilizing solid bed deformation with forced melt removal

摘要

A new patent pending barrier screw geometry incorporating modifications to the solids channel of the barrier section of the screw was introduced to improve melting and mixing efficiency. The new design geometry repeatedly deforms the solid bed to improve melting and mixing. Cross channel pressure gradients and screw pullouts obtained from crash cooling experiments were used to investigate the working principles of the new design. The results were compared to those obtained under similar conditions with a conventional barrier screw.