US 11,654,465 B2
Method for producing a blank from extrusion material, and extruder
Raouf Ben Amor, Fuerth (DE); Augustin Donhardt, Hummeltal (DE); Tim Guter, Fuerth (DE); Bjoern Hoschke, Essen (DE); Guenther Hoyer, Essen (DE); Herbert Rudolf Kauper, Fuerth (DE); Klaus Roediger, Bochum (DE); Fabian Rosenberger, Latrobe, PA (US); and Jürgen Schwägerl, Vohenstrauss (DE)
Assigned to Kennametal Inc., Latrobe, PA (US)
Filed by Kennametal Inc., Latrobe, PA (US)
Filed on Feb. 26, 2019, as Appl. No. 16/285,906.
Claims priority of application No. 102018202941.5 (DE), filed on Feb. 27, 2018.
Prior Publication US 2019/0262879 A1, Aug. 29, 2019
Int. Cl. B21C 23/14 (2006.01); B21C 25/08 (2006.01); B21C 25/02 (2006.01)
CPC B21C 23/147 (2013.01) [B21C 25/02 (2013.01); B21C 25/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for producing a blank for the production of a cutting tool in which a green body extending in the direction of an extrusion axis is produced from extrusion material by means of an extruder that has an extrusion channel extending along the extrusion axis, wherein the extrusion channel, together with a movable mold element, form an adjustable die of the extruder, the method comprising:
moving the first movable mold element relative to the extrusion channel and within said extrusion channel during the extrusion of the green body, wherein the first movable mold element is moved during the extrusion of the green body so that, as a result, the extruded green body has a first functional segment and a second functional segment following in the direction of the extrusion axis, wherein the first functional segment and the second functional segment have different geometries that are formed by the adjustable die, wherein the first movable mold element is moved in an orthogonal direction to the extrusion axis during the extrusion of the green body; and
moving a second movable mold element along the extrusion axis of the extrusion channel during the extrusion of the green body,
wherein the first movable mold element is configured to guide a filament that is moved relative to the first movable mold element during the extrusion of the green body so that said filament at least intermittently emerges with a free end from the first movable mold element and extends into the extrusion material.