3d printing system and its nozzle device

Abstract

The present invention provides a print head device applicable to a 3D printing system that is capable of achieving 3D forming of a metal wire by means of a fused deposition forming technique. The print head device comprises a nozzle having a feeding hole and a liquid outlet disposed oppositely at one end of the feeding hole, and an induction coil disposed outside the nozzle. The metal wire is fed into the nozzle via the feeding hole; and the induction coil is capable of generating alternating current for acting on the metal wire, such that the metal wire is heated to melt, and discharged via the liquid outlet. The print head device of the present invention achieves 3D printing of a high-temperature alloy by means of the fused deposition forming principle; by extruding the molten metal through the liquid outlet of the nozzle, the accuracy of printing may be improved substantially, thereby guaranteeing the quality of forming, facilitating forming processing of a three-dimensional model, and greatly reducing the printing cost of the 3D printing system. The present invention also provides a 3D printing system.

Description

Technical field [0001] The present invention relates to the technical field of 3D printing, in particular to a 3D printing system and its nozzle device. Background technique [0002] 3D printing technology belongs to rapid prototyping technology. The basic principle of 3D printing technology is laminated manufacturing. The fast printer forms the cross-sectional shape of the workpiece in the X-Y plane through scanning, and displaces the layer thickness intermittently in the Z coordinate to finally form a three-dimensional part. Fused Deposition Modeling (FDM) technology is one of the 3D printing technologies. Fused deposition molding technology heats and melts filamentous hot-melt materials. At the same time, under the control of a computer, the three-dimensional nozzle can selectively coat the material on the worktable according to the cross-sectional profile information, and form a layer of cross-section after rapid cooling. After the formation of one layer is completed, the m...

AI Technical Summary

Problems solved by technology

However, metal parts manufactured by laser sintering technology have shortcomings such as loose structure, insufficient strength to meet the use requirements, and complicated and expensive equipment; while electron beam, micro-arc welding, and three-dimensional welding methods do not have nozzles to constrain metal droplets, and the forming accuracy is difficult. ensure

There are certain problems in the molding quality and accuracy of the above two methods, which are not convenient for 3D model molding

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