Explanation

Also called discharge, it is the flow caused by a pressure gradient in the polymer extrusion process, which is caused by the back pressure of the die, die, filter screen, etc. on plastics. leakage flow usually flows from the clearance between the screw edge and the barrel along the direction of the screw axial hopper, and the flow is determined by the back pressure and clearance. The gap between the screw and the barrel is usually small, so the flow rate of leakage flow is usually small, and the impact on the extrusion process is also small.

Classification