Gradient heating nozzle device for fused deposition metal 3D printing

Abstract

The invention discloses a gradient heating nozzle device for fused deposition metal 3D printing. The gradient heating nozzle device comprises an extruding assembly, a charging barrel and a nozzle body. The extruding assembly is connected with the charging barrel through a fixing connecting part. The tail end of the charging barrel is connected with the nozzle body. The extruding assembly comprisesa worm, a worm wheel, a lead screw and a piston. The worm wheel is engaged with the worm through gear teeth. The worm wheel drives the lead screw through threads. The tail end of the lead screw is connected with the piston. The worm rotates to drive the worm wheel to rotate, the worm wheel rotates to drive the lead screw to move, and then the piston is driven to move. The charging barrel is provided with a feeding inlet and a heat insulation heating assembly. The heat insulation heating assembly comprises a heating layer and a heat insulation layer. The heating layer is tightly attached to the outer wall of the charging barrel. The heating layer and the charging barrel are wrapped with the heat insulation layer together. The nozzle body is provided with a temperature sensor and a heatingpipe. The heating temperature of the heating pipe is higher than that of the heat insulation heating assembly, and gradient heating is formed.

Description

technical field [0001] The invention relates to the fields of 3D printing technology and mechanical technology, in particular to a gradient heating nozzle device for fused deposition metal 3D printing. Background technique [0002] 3D printing is an additive manufacturing technique that uses bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. Common 3D printing rapid prototyping methods for directly manufacturing metal functional parts mainly include: Selective Laser Sintering (Selective Laser Sintering, SLS) technology, Direct Metal Laser Sintering (Direct Metal Laser Sintering, DMLS), Selective Laser Melting (Selective Laser Melting, SLM) technology, Laser Engineered Net Shaping (LENS) technology and Electron Beam Selective Melting (EBSM) technology, etc. These methods all use metal powder as the molding material, and have higher requirements on the performance of the powder, such as high density, high sphericity, uniform ...

AI Technical Summary

Problems solved by technology

Fused deposition 3D printing is widely used because of its simple process, low cost, no laser, and fast forming speed, but there are still some shortcomings in metal printing. There are many problems in extrusion, etc.

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