A 3D printing nozzle to prevent material leakage

Abstract

The invention relates to a 3D printing nozzle for preventing leakage. The 3D printing nozzle comprises a nozzle, a first connecting pipe, a heating mechanism, a second connecting pipe, a heat dissipating mechanism, a third connecting pipe, a feeding mechanism and an overflow preventing mechanism; the heating mechanism comprises a heating block, and a conveying unit and a temperature adjusting unit arranged on the heating block; the conveying unit comprises a discharge channel and four feed channels; the heat dissipating mechanism comprises a heat dissipating box and a heat dissipating pipe; the feeding mechanism comprises a feed box, a feed pipe, a driving module and an extrusion module; and the overflow preventing mechanism comprises a second motor, a lead screw and an adjusting block. The 3D printing nozzle for preventing leakage can synchronously lead in four different raw materials; the heat dissipating mechanism can effectively prevent heat of the heating block from transferring to the heat dissipating pipe so as to prevent raw material solution from flowing back into the heat dissipating pipe to cause the problem of unsmooth feeding. The feeding mechanism can lead in multiple raw materials as needed. The overflow preventing mechanism can prevent the wire drawing phenomenon between two individual monomers caused by leakage of the nozzle during printing of two independent monomers.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a 3D printing nozzle for preventing material leakage. Background technique [0002] 3D printing (3DP) is a kind of rapid prototyping technology. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. [0003] Existing 3D printers have many deficiencies, including the warping problem of the bottom layer, the offset problem of different parts of the model, the problem of potholes on the surface of the model, the problem of sagging of the suspended part of the model, and the problem of wire drawing. Among them, the problem of wire drawing exists in almost all brands of 3D printers. When printing adjacent independent structures, there will always be wire drawing. The existing 3D printers have introduced a retraction mechanism, but only The center of the material in the nozzle will retr...

AI Technical Summary

Problems solved by technology

Among them, the problem of wire drawing exists in almost all brands of 3D printers. When printing adjacent independent structures, there will always be wire drawing. The existing 3D printers have introduced a retraction mechanism, but only The center of the material in the nozzle will retreat, and the nozzle is generally large in volume, so the material around it will inevitably leak

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