3d printing nozzle and 3d printer

Abstract

The invention discloses a 3D printing nozzle and a 3D printer. The 3D printing nozzle includes a housing, a mixing unit and a nozzle. The housing has a material inlet and a material outlet, and the inner cavity wall of the housing protrudes outward to form a plurality of protrusions. The mixing unit is arranged in the housing, wherein the mixing unit includes a central axis and a plurality of blades arranged at intervals along the central axis, the blades and the protrusions are arranged alternately, and the distance e between the blades and the protrusions satisfies e≥3d, d is the maximum particle size of the particles to be mixed; the nozzle is arranged at the discharge port of the casing. Through the cooperation of the mixing unit and the protruding part of the inner wall of the casing, the particles to be mixed form laminar flow and turbulent flow during the traveling process, so that the particles to be mixed are quickly mixed evenly.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing nozzle and a 3D printer. Background technique [0002] With the development of information technology and automation technology, more and more fields in modern society have adopted machinery instead of labor to improve efficiency and product quality. With the gradual development of my country's industrial technology and the fading of the demographic dividend, all walks of life are seeking greater breakthroughs in automation. For example, in the forming process of precast concrete components, there are a lot of labor costs and time costs lost in the process of laying formwork, pouring and forming, removing formwork, and hoisting and transportation. Another example is the application of 3D printing in bridges and tunnels. The biggest advantage is that there is no need for templates, which saves costs; it also reduces the number of workers, improves pr...

AI Technical Summary

Problems solved by technology

[0003] At present, most 3D printing nozzles use screw mixing to mix materials. The 3D printing nozzles are bulky and heavy, and the density of the cement-based material itself is high, which affects the stability and accuracy of the printer during movement; and its stirring paddle Coaxial with the feeding screw, when the speed is too fast or too slow, it is prone to uneven stirring

The way of pre-mixing and then pumping can not control the working time of printing materials, and once printing problems occur, stopping halfway will cause a lot of waste of materials, and cannot guarantee continuous working methods, thus making 3D printing lose its original nature. Advantage

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