Method for extruding a profile or a similar billet from a bolt or bar and corresponding device

摘要

A method for extruding a profile or a similar billet from a bolt or bar that is guided in a recipient bore of a recipient and that is extruded by an extrusion die through a shaping section of a shaping tool. Once the front face of the bar is placed on the rear surface of a preceding bar, air or similar flowing agents present on the surfaces are discharged during pressure build-up in an approximately radial relation together with the contaminations that are present in detached form on the transversal bur surface. During pressure build-up, parts of the transversal burs are radially displaced; the displaced parts of the traversal bur surface are discharged on the periphery in an approximately radial relation before the bar enters the shaping tool. To achieve this, a welding chamber or pre-chamber is disposed in the direction of extrusion (x) in a gap that can be adjusted between the recipient and the shaping tool. The chamber is provided with at least one lateral opening or discharge channel through which the displaced parts of the transversal bur are discharged.