Patent ID: 6192730
Filing Date: 2001-02-27
Classification: B21C

Abstract:
A process for extruding a hollow section from a billet, comprising the steps of:introducing the billet into a bore of a container; andfeeding the billet in an extrusion direction into a shape-forming opening in a die, the feeding step including pressing the billet material into at least two neighboring central inlets in the die which are respective central inlet elements for channels running out from the inlets, the central inlets being within an extension to a hollow space in a forming section, and feeding a resultant ductile mass outwards at an angle to the direction of extrusion through a plurality of channels to the shape-forming cross-section of the die so that the material is always fed to the die from a middle of the billet and is not spread out to the shape-forming region of the die until the material is in the die itself.