Nozzle for extruding a material rich in protein and water, as well as an extrusion machine comprising such a nozzle

A nozzle for extruding a material rich in protein and water, comprising:

• an outer casing which is tubular, centered on an axis, and which is thermoregulated, and
• an internal component which is arranged coaxially inside the outer casing and which is mounted so as to rotate about the axis with respect to the outer casing, so that:
• a downstream part of the internal component extends outside the outer casing and is engaged with a motorization suitable for rotating the internal component about the axis, and
• a channel is delimited between the outer casing and the internal component, the channel having a cross-section that is annular, centered on the axis, and the channel having an upstream end and a downstream end, which are axially opposed to each other and between which the material flows into the channel, so that when the material is pushed through the nozzle, the material advances through the channel from the upstream end to the downstream end through which the material axially comes out of the channel.