Abstract: An extruder for multi-lumen tubular products with multi-coronal arrangement comprises a main body (2) defining a passage cavity (2a) and an average outflow direction (2b), as well as an input surface (3) and an exit surface (4) respectively formed on opposite faces of the main body (2) and defining respective entry areas afferent to and efferent from the passage cavity (2a); the extruder further comprises an expansion portion (4a) associated with the exit surface (4) and adapted to mutually orient spontaneous expansive flows of said extrusion material through the exit surface (4) in reciprocal directions of mutual intersection.

Abstract: The extruder screw comprises a screw body (2) coated by an external functionalization coating (4), and also at least partially coated by a wear detection-quantification coating (5) arranged between the external surface (3) of the screw body (2) and the external functionalization coating (4), and detectable with respect to the external functionalization coating (4).

Abstract: A system for additive manufacturing processes includes an anthropomorphic robot, an extruder mounted on the robot, sensors for detecting a plurality of parameters related to an additive manufacturing process, means for regulating the state of a material extruded from the extruder and a control unit configured to control an extruder path; the control unit is configured to determine the extruder path and/or the deposition strategies of the material according to at least two parameters detected by the sensors.

Abstract: An extruder for multi-lumen tubular products with multi-coronal arrangement comprises a main body (2) defining a passage cavity (2a) and an average outflow direction (2b), as well as an input surface (3) and an exit surface (4) respectively formed on opposite faces of the main body (2) and defining respective entry areas afferent to and efferent from the passage cavity (2a); the extruder further comprises an expansion portion (4a) associated with the exit surface (4) and adapted to mutually orient spontaneous expansive flows of said extrusion material through the exit surface (4) in reciprocal directions of mutual intersection.

Abstract: Described is a dry calibration device for extruders comprising a calibration head (2) having a calibration duct (3); the device also comprising a heat exchange jacket (5) positioned in contact with the calibration head (2) and suction means (9) associated with the calibration duct (3), while the heat exchange jacket (5) comprises a thermally conductive element (6) positioned in contact with an outer surface (4a) of the calibration head and forming a contact surface (6a) extending continuously along a longitudinal axis (6A) of extension of the calibration head (2).

Abstract: Described is a dry calibration device for extruders comprising a calibration head (2) having a calibration duct (3); the device also comprising a heat exchange jacket (5) positioned in contact with the calibration head (2) and suction means (9) associated with the calibration duct (3), whilst the heat exchange jacket (5) comprises a thermally conductive element (6) positioned in contact with an outer surface (4a) of the calibration head and forming a contact surface (6a) extending continuously along a longitudinal axis (6A) of extension of the calibration head (2).

Abstract: An extrusion device, in particular for plastic materials comprising: an extrusion head (2) having a nozzle (2a) for ejection of at least one plastic material (M1, M2); a first duct (5) formed in said head (2) for feeding a first plastic material (M1) to said ejection nozzle (2a); a second duct (?) formed in said head (2) for feeding a second plastic material (M2) to said ejection nozzle (2a); and a selection element (8), disposed in the vicinity of said ejection nozzle (2a) and able to be switched between a first operating condition at which it closes the second duct (6) to enable feeding of the first plastic material (M1) through the first duct (5), and a second operating condition at which it closes the first duct (5) to enable feeding of the second plastic material (M2) through the second duct (6).

Abstract: An extrusion device, in particular for plastic materials comprising: an extrusion head (2) having a nozzle (2a) for ejection of at least one plastic material (M1, M2); a first duct (5) formed in said head (2) for feeding a first plastic material (M1) to said ejection nozzle (2a); a second duct (?) formed in said head (2) for feeding a second plastic material (M2) to said ejection nozzle (2a); and a selection element (8), disposed in the vicinity of said ejection nozzle (2a) and able to be switched between a first operating condition at which it closes the second duct (6) to enable feeding of the first plastic material (M1) through the first duct (5), and a second operating condition at which it closes the first duct (5) to enable feeding of the second plastic material (M2) through the second duct (6).

Abstract: A method for producing ceramic micromanufactured items comprises the following stages: a starting material constituting at least a micromanufactured item (1) is prepared and used to from the micromanufactured item (1); said starting material includes at least a pre-ceramic polymer, and the method further comprises a stage in which the inner structure of the starting material is modified, said structure being turned from a polymeric structure to a ceramic structure after the forming stage of said micromanufactured item (1).

Abstract: A method for producing ceramic micromanufactured items comprises the following stages: a starting material constituting at least a micromanufactured item (1) is prepared and used to from the micromanufactured item (1); said starting material includes at least a pre-ceramic polymer, and the method further comprises a stage in which the inner structure of the starting material is modified, said structure being turned from a polymeric structure to a ceramic structure after the forming stage of said micromanufactured item (1).