Abstract: A system for optimizing the multi-extruder deposition process in a 3D printer including multiple extruders requires each extruder to have a body including an outer thermal insulation shell; the shell allowing the inlet/outlet of a fluid for the active and controlled refrigeration of the extruder. A method for optimizing the multi-extruder deposition process in a 3D printer with multiple extruders involves managing the temperature of each extruder using active refrigeration sized so as to have a sudden control of the cooling ramp and to manage the viscosity of the material in the event of extruder change. For the entire duration of the printing with another extruder, the unused extruder nozzle remains in a limited range around the extrusion temperature, thus eliminating downtime, while the solidified filament from the sudden forced cooling is pulled back into a low temperature nozzle area where it does not degrade during non-use.

Abstract: A calibration system for automatically resetting the effective vertical Z coordinate corresponding to the tip of an extruder of a printing head with filler material filament for 3D printers provided with a printing plane movable along the vertical Z axis, wherein the printing head is installed on a carriage for moving the extruder on the horizontal plane XY, includes at least one touch probe unit associated with and operatively connected to the extruder, specifically arranged between the carriage and the extruder itself, including: at least one movable support, at least one touch probe, at least one extruder support, at least one coupling system, at least one carriage, at least one extruder. The movable support is substantially a mechanical spring-operated sliding system, configured to allow the extruder to travel the path needed to activate the touch probe during the touching operation and to return to the printing position.

Abstract: An automatic calibration system for calibrating the parallelism between a printing plane of a 3D printer and a virtual plane on which the extruder of the 3D printer moves, to align the printing plane with the virtual plane on which the extruder moves, includes: at least one extruder, or a printing head on which the extruder itself is mounted, movable on a horizontal plane; at least one device for measuring the distance of the printing plane associated with the extruder or with a printing head; a movable printing plane along the vertical axis Z, the plane being equipped with at least three non-aligned actuators, which are controllable and operable independently of each other; a central control unit (MCU or PLC) of the calibration system and of all the parts thereof.

Abstract: Disclosed is an extrusion system including a cooled extruder, fixable to a pressing carriage of a machine for quick prototyping with thread of filler material, including: a unit for controlled and localized heating of the filler material, a unit blowing compressed air onto a zone of the extruder to be cooled, immediately upstream of the melting zone, with a predetermined flow rate, a channel supplying the thread of filler material. The extruder includes a nozzle whose body includes a melting zone, and with an outlet end conveying the material on a pressing plane. The nozzle is integral with a heating block. The nozzle is made of a material having high wear and corrosion resistance and good workability. At least at the melting zone of the nozzle is internally processed with a surface finishing having a roughness 0.2-2.5 pm or less, which ensures a good flowabitly of the material.

Abstract: An automatic calibration system for calibrating the parallelism between a printing plane of a 3D printer and a virtual plane on which the extruder of the 3D printer moves, to align the printing plane with the virtual plane on which the extruder moves, includes: at least one extruder, or a printing head on which the extruder itself is mounted, movable on a horizontal plane; at least one device for measuring the distance of the printing plane associated with the extruder or with a printing head; a movable printing plane along the vertical axis Z, the plane being equipped with at least three non-aligned actuators, which are controllable and operable independently of each other; a central control unit (MCU or PLC) of the calibration system and of all the parts thereof.

Abstract: A calibration system for automatically resetting the effective vertical Z coordinate corresponding to the tip of an extruder of a printing head with filler material filament for 3D printers provided with a printing plane movable along the vertical Z axis, wherein the printing head is installed on a carriage for moving the extruder on the horizontal plane XY, includes at least one touch probe unit associated with and operatively connected to the extruder, specifically arranged between the carriage and the extruder itself, including: at least one movable support, at least one touch probe, at least one extruder support, at least one coupling system, at least one carriage, at least one extruder. The movable support is substantially a mechanical spring-operated sliding system, configured to allow the extruder to travel the path needed to activate the touch probe during the touching operation and to return to the printing position.

Abstract: Disclosed is a mechatronic movement system for three-dimensional printing for a rapid-prototyping machine, such as a 3D printer, of the type provided with at least one microprocessor electronic management board, in which the movement of the printing way of the 3D printer along the axes X and Y of the horizontal plane is obtained exclusively with geared kinematic chains.

Abstract: Disclosed is a mechatronic movement system for three-dimensional printing for a rapid-prototyping machine, such as a 3D printer, of the type provided with at least one microprocessor electronic management board, in which the movement of the printing way of the 3D printer along the axes X and Y of the horizontal plane is obtained exclusively with geared kinematic chains.