Deposition process optimization system multi extruder and related method

A system for performing a multi-extruder deposition process in a 3D printer with two or more extruders, the system comprising:

• a) an outer thermal insulation shell, which is made with one or more materials having low heat exchange coefficients;
• said shell being configured to allow the inlet/outlet of a fluid for the active and controlled refrigeration of the extruder;
• b) at least one extruder;
• wherein said extruder has a body comprising:
• a polymer melting tank, an extruder nozzle, a temperature probe;
• a first hole for housing a heating resistor of the polymer melting tank;
• a second hole for housing the extruder nozzle;
• one or more refrigeration holes for the melting tank;
• a third hole for housing the temperature probe;
• or said extruder has a body comprising:
• a nozzle;
• a containment structure for the nozzle in which the nozzle itself is inserted, a circular band heating resistor, in which a temperature probe is integrated, is keyed onto such containment structure;
• a space about the heating resistor, in which the active and controlled refrigeration fluid flows about the heating resistor substantially following a spiral path starting from a lower inlet towards an outlet in an upper part, thus taking advantage of the best heat exchange coefficient determined by the swirling motion.