Device for arranging transverse deformations on the insides of extruded light-metal hollow profiles

摘要

The invention relates to a device for arranging transverse deformations on the insides of extruded light-metal hollow profiles (9) which are used in particular for the manufacture of thermally insulated light-metal frames for windows or doors. To this end, a knurling tool (1) is provided, which is connected via a connection piece (4) to the mandrel (7) of the extrusion tool (6). The length of the connection piece (4) is in this case dimensioned in such a manner that the knurling tool (1) is arranged outside the temperature zone of the kneadability of the extruded profile (9). The knurling tool (1) is guided in the interior of the hollow profile (9) and is secured by the connection piece (4). As a result, a knurling working of the hollow profile takes place in one work operation with the extrusion. <IMAGE>