A dual water-cooled melting nozzle for metal 3D printing

Abstract

The invention discloses a double water-cooled melting nozzle for metal 3D printing, comprising: a wire feeding tube, a wire feeding tube joint, a cold-heat transition tube, a water-cooled heat exchanger, an inner diameter tube, a red copper pad, a fastening screw cover, and an induction tube Gland, abutting coupler, variable temperature transition tube section, small copper pad, extrusion gun core shell, induction heating tube, thin-wall melting tube, extrusion nozzle, electric induction water-cooled copper tube, extrusion gun shell. The melt extrusion nozzle adopts a double water cooling design. The wire feeding and extrusion structure is ingenious and compact. The nozzle body can be immersed in a high temperature airtight box, and the external temperature and the temperature of the electric induction heating part inside the nozzle are isolated from each other. The feeding wire is heated rapidly and the upper limit temperature is high, which can heat and extrude a variety of metals, which can meet the requirements of melting, heating and extruding a variety of metal wires in the rapid prototyping method of metal melt extrusion.

Description

technical field [0001] The invention relates to a 3D printing or rapid prototyping manufacturing device, in particular to a double water-cooled melting nozzle for metal 3D printing. Metal melt extrusion 3D printing is a process in which the metal material is heated and melted or semi-melted, and then the molten metal is extruded from the small pores by extrusion, and the process of stacking is carried out. The physical process is similar to the 3D printing of organic materials. Printing principle. Background technique [0002] 3D printing or rapid prototyping manufacturing has become a hot research object in various advanced manufacturing fields due to its unique molding ability and convenient and fast manufacturing form. The attention of institutions and industrial manufacturers has become an emerging manufacturing method. [0003] At present, the 3D printing of non-metallic materials is mainly based on melt extrusion, that is, the wire is fed into a nozzle equipped with ...

AI Technical Summary

Problems solved by technology

[0004] Compared with the 3D printing technology of laser heat source, the principle of 3D rapid prototyping technology of metal melt extrusion is more similar to the electric heat melt extrusion 3D printing technology of non-metallic materials, because metal melt extrusion rapid prototyping technology requires nozzle heating The melting temperature is very high, usually more than 2 / 3 of the melting point of metals, which is 3 to 4 times the heating temperature of conventional non-metallic 3D printing nozzles. At the same time, the forming environment is relatively harsh, and its core components need to be immersed in a closed high temperature In the environment, this brings great inconvenience to the mechanical structure design and electrical design. It is necessary to consider the high temperature resistance of the material, so the technical difficulty is high. At present, there is no practical metal melting and forming equipment available.

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