Equipment considerations for high pressure extrusion

摘要

High discharge pressures in the extrusion process can adversely affect several aspects of extrusion equipment and reduce the capacity of the extrusionprocess. Aging or poorly maintained equipment is particularly prone to potential failure. This paper considers the effect of high discharge pressures on the extruder gear box safety factor, thrust bearing life, pumping capacity and extrudate quality. Considerationis given to screw and barrel wear, grooved feed sections, melt temperature and screw design.