STRENGPRESSVERKTYG FOR FRAMSTELLNING AV HALPROFILER

摘要

Extrusion tool for the manufacture of hollow sections the said tool comprising a die cap with a bearing surface to form the outer contour of the hollow section and a core supported on the die cap or a one-piece core and die cap with at least one mandrel held by webs to form the inner contour of the hollow section, characterised in that a core shielding plate situated in front of the core in the direction of extrusion and provided with ports for the metal to be extruded, is separated by a stress relieving gap from the core at least at its area facing the mandrel.