A device for cooling the area of the exit of the molten thermoplastic material from the nozzle of a 3D printer and the models obtained from it

摘要

The device belongs to the field of additive technologies, in particular to devices for cooling the area of the exit of the melt of thermoplastic material from the nozzle of a 3D printer and the models obtained from it using the technology of layer-by-layer fusion. models contain a centrifugal fan, an air duct with an air inlet channel. The air duct is a hollow truncated inverted cone with a blind top wall and an inner wall forming a through hole in its center, the axis of which is perpendicular to the plane of the print area. The outer wall of the air duct on the side of the printable area protrudes relative to the inner wall of the air duct. The inner and outer walls of the air duct form a continuous annular slot for the air flow outlet in the lower plane of the air duct. The air supply channel has a complex cross-sectional geometry. The axis of the air supply channel lies in a plane parallel to the plane of the printable area. The air supply channel is made in one piece with the outer wall of the air duct with the possibility of providing an annular closure of the air flow in the air duct. In a section in a plane parallel to the plane of the printing area, one wall of the air supply channel is located tangentially to the outer wall of the air duct, and the other wall of the air supply channel is directed tangentially to the inner wall of the air duct. The width of the air supply channel does not exceed the distance between the outer and inner walls of the duct. The technical result is to ensure uniform all-round cooling of the area where the melt of thermoplastic material exits from the nozzle of the 3D printer and the models obtained from it.