Device and method for cooling an extrusion cylinder

摘要

A longitudinal stream of cooling air is caused to flow around the cylinder (10) and over the length of each of one or more heating-and-cooling zones. This longitudinal flow is facilitated by specially designed cooling fins (22; 25). The performance of the extruder is improved in that the temperature over the cross-section of the cylinder is more uniform. Moreover, wear and tear on the extrusion screw and on the cylinder are greatly reduced.