DIRECT OR INDIRECT METAL PIPE EXTRUSION PROCESS, MANDREL FOR EXTRUDING METAL PIPES, METAL PIPE EXTRUDER AND EXTRUDED METAL PIPE

摘要

different radial embossing (embossing) and has two axially offset arrangement with includes two pressure surface ( 63,64 ) and the two pressure surfaces ( 63,64 ), the mandrel (6) for the extrusion of a metal pipe comprising a transition region 66 in the transition region between the 66 the support surface 62 to Having , the first pressure surface of the two pressing surfaces (63) interact with the die and the second pressing surface 64 is pressed from the first position to the die and interacting with the mandrel to a second pressing position ( the adverse effect due to the change (shifting) of 6) can be minimized. ;