Adjustable 3D printing nozzle

Abstract

The invention provides an adjustable 3D printing nozzle. The adjustable 3D printing nozzle comprises a nozzle assembly, wherein he nozzle assembly comprises a first nozzle body (1), a second nozzle body (2), a third nozzle body (3), a driven gear (4), a blocking piece (5), a spring (6), a fixing piece (7), a feeding piece (8) and a driving assembly (9); the blocking piece (5) is an integrally-formed piece and comprises a blocking piece body (51), a stop block channel (52), a blocking plate (53) and a first fastening thread (54); and the feeding piece (8) comprises a feeding piece body (81), afeeding through hole (82) and an installation face (83). According to the adjustable 3D printing nozzle, the spraying area of the whole nozzle can be adjusted according to needs by adjusting the number of channels for materials to be input into the nozzle and the area of each channel, and therefore different requirements for the material extrusion rate during printing of different structures can be met, the same printing nozzle can be suitable for printing of different structures and transverse streets, the application range is wide, and the printing efficiency is high.

Description

technical field [0001] The invention relates to the technical field of wheel 3D printing, in particular to an adjustable 3D printing nozzle. Background technique [0002] 3D printing is a kind of rapid prototyping technology, also known as additive manufacturing. It is based on digital model files, using powdered metal or plastic and other bondable materials to construct objects by layer-by-layer printing. technology. [0003] In 3D printing technology, the filamentous hot-melt material is mainly heated and melted, extruded through the printing nozzle and solidified; the hot-melt material is melted and ejected from the nozzle, and deposited on the printing table panel or the previous layer of cured material. , when the temperature is lower than the curing temperature, it starts to cure, and the final product is formed by layer-by-layer accumulation of materials. In the 3D printing process, for 3D models with multiple different cross-sectional structures, the spraying areas...

AI Technical Summary

Problems solved by technology

In the 3D printing process, for 3D models with multiple different cross-sectional structures, the spraying areas of the required printing nozzles are different. If different nozzles are replaced during the printing process, firstly, frequent replacement will waste a lot of manpower and material resources. Excessive replacement time causes the sprayed material to solidify, and the subsequent spraying is still in a molten state, resulting in layering of the same layer of the model; therefore, in this field, the printing of different cross-sectional areas is often achieved by adjusting the spraying pressure and increasing the powder feeding rate.

However, by changing the process parameters to print different cross-street areas, first, the computing capacity and intelligence of the instrument are highly required (the instrument needs to store the corresponding process parameters under a large cross-sectional area, and at the same time, it needs to perform appropriate calculations to find the best matching parameters), the second is that the instrument has a high failure rate, is not easy to repair, and the later maintenance cost is high. The overall requirements for 3D printing equipment are too high, and the cost is high, which is not conducive to the promotion of 3D printing technology.

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