Method for producing a blank from extrusion material, and extruder

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 first 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 green body is produced from two different extrusion materials, wherein the extruder has a slide control movable between two positions, wherein the slide control releases one of two extrusion material feed devices toward the extrusion channel depending on the position, and wherein the slide control is moved between the two positions during the extrusion of the green body.

An extruder for producing green bodies, comprising:

• an extrusion channel extending along an extrusion axis and
• a first movable mold element, wherein the extrusion channel and the first movable mold element form an adjustable die configured for producing an extruded green body extending in the direction of the extrusion axis,
• wherein the first movable mold element is movable relative to the extrusion channel within the extrusion channel during the extrusion of the green body, whereby the first movable mold element of the adjustable die is moved so that the extruded green body has a first functional segment and a second functional segment following the first functional segment 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,
• wherein a second movable mold element is moved along the extrusion axis during the extrusion of the green body, and
• 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.

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 first movable mold element and a second 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 the second movable mold element along the extrusion axis of the extrusion channel during the extrusion of the green body, wherein the green body is produced from two different extrusion materials, wherein the extruder has a slide control movable between two positions, wherein the slide control releases one of two extrusion material feed devices toward the extrusion channel depending on the position, and wherein the slide control is moved between the two positions during the extrusion of the green body.