Extrusion device

Extrusion device comprising:

• at least one supply station suitable for containing a material to be extruded;
• a plurality of propellers, each propeller of said plurality of propellers being operatively connected to at least one corresponding supply station for receiving the material to be extruded from said at least one corresponding supply station, said at least one corresponding supply station selected from the at least one supply station;
• at least one extrusion head, arranged downstream of said plurality of propellers, connected to at least one propeller for receiving the material to be extruded from said at least one propeller, said at least one propeller selected from said plurality of propellers;
• wherein each propeller of said plurality of propellers can be selectively activated to modulate an extrusion speed and/or a quantity of material to be extruded as an output from a corresponding head or corresponding heads the at least one extrusion head;
• wherein the at least one supply station comprises:
• a first supply station suitable for containing a first material to be extruded;
• and
• a second supply station suitable for containing a second material to be extruded;
• wherein the plurality of propellers comprises:
• a first propeller operatively connected to the first supply station for receiving the first material to be extruded from said first supply station;
• a second propeller operatively connected to the second supply station for receiving the second material to be extruded from said second supply station;
• a third propeller selectively connected to the first or second supply station for receiving the first or second material to be extruded from said first or second supply station, respectively;
• and
• the extrusion device comprises:
• a plurality of extrusion heads, arranged downstream of said plurality of propellers, each extrusion head of the plurality of extrusion heads being connected to at least one propeller for receiving from said propeller the first or second material to be extruded, said at least one extrusion head selected from said plurality of extrusion heads;
• wherein said plurality of extrusion heads comprises:
• a first extrusion head operatively connected to the first and to the third propeller for receiving the first material to be extruded from said first and third propeller;
• and
• a second extrusion head operatively connected to the second and to the third propeller for receiving the second material to be extruded from said second and third propeller
• characterised in that said extrusion device comprises a thermo-regulating device simultaneously active on at least one pair of propellers so as to regulate a common extrusion temperature of said at least one pair of propellers, said at least one pair of propellers selected from said plurality of propellers.