3D printing head based on grapheme static wire printing high-power LED heat dissipation substrate

Abstract

The invention relates to the field of 3D printing, in particular to a 3D printing head based on a grapheme static wire printing high-power LED heat dissipation substrate. The 3D printing head comprises a feed unit, a heating unit, and a discharge hole connected to the lower end surface of the heating unit; a cylindrical hole for allowing a grapheme static wire to pass through is formed in the feedunit, a plurality of driving wheels are uniformly arranged from the top down on one side of the cylindrical hole, the driving wheels are butted against one side of the grapheme static wire, and the input ends of the driving wheels are connected with a motor after passing through the feed unit; a plurality of driven wheels are uniformly arranged from top down on the other side of the cylindrical hole, and the driven wheels are butted against the other side of the grapheme static wire; when the motor drives the driving wheels to rotate, the grapheme static wire is fed or discharged and drives the driven wheels to rotate; the uniform speed feeding of the grapheme static wire is achieved through the arrangement of the driving wheels and the driven wheels, since the driven wheels are mounted on a base, and the base is butted against the inner wall of the feed unit through an elastic element, grapheme static wires with different diameters can be always kept in a liner state within the cylindrical hole. Therefore, the flow rate of wires formed by extrusion after fusion is consistent.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a 3D printing nozzle for printing high-power LED heat dissipation substrates based on graphene conductive filaments. Background technique [0002] Graphene conductive wire is a wire product with high thermal conductivity composed of functionalized graphene and low melting point alloy wire. It is mainly used for printing high-power LED heat dissipation substrates. [0003] 3D printing is a technological product of rapid prototyping technology. It is a technology based on digital model files, using bondable materials such as powdered metal or plastic, to construct objects by layer-by-layer printing. The 3D printing head extrudes the printing material onto the 3D printing platform, and then forms a three-dimensional entity. The printing head mainly uses the continuous extrusion of the imaging printing material to extrude the molten printing material through the nozzle nozzle, and then th...

AI Technical Summary

Problems solved by technology

[0004] Conventional fused deposition 3D printers can only accept consumables of one diameter. When it is necessary to print curved LED heat dissipation substrates with higher precision, consumables with smaller diameters are often required to achieve this. However, consumables with smaller diameters pass through the feeding unit When using a cylindrical through hole, since the diameter of the cylindrical through hole is larger than the diameter of the consumable, it is easy to cause the consumable to bend in the cylindrical through hole, resulting in inconsistent flow rates of the extruded wire after melting, thereby affecting the accuracy of the three-dimensional object after molding. It has become an urgent problem for researchers to realize that fused deposition 3D printers can meet the needs of different diameter consumables

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