Multi-material multi-scale 3D (3-dimensional) printing device provided with single spray nozzle as well as working method of 3D printing device

Abstract

The invention discloses a multi-material multi-scale 3D (3-dimensional) printing device provided with a single spray nozzle as well as a working method of the 3D printing device. The 3D printing device comprises a base, a work table, a bearing table, a substrate, a power supply, the spray nozzle and a bracket, wherein the base is mounted at the bottommost part, the bracket and the work table are mounted above the base, the spray nozzle is mounted on the bracket, the bearing table is fixed on the work table, and the substrate is fixed above the bearing table; an anode and a cathode of the power supply are connected with a nozzle body of the spray nozzle and the bearing table respectively; relative motion between the spray nozzle and the substrate in x, y and z directions is realized by the aid of relative motion between the work table and the bracket. The spray nozzle is provided with a plurality of feed openings connected with different trace feeding pumps, multiple materials are thoroughly mixed under the action of a stirrer after entering the spray nozzle, and multi-material printing is realized. The macroscopic geometrical shape as well as microstructures in an object and on the surface of the object is controlled reasonably, and multi-scale structural integrated manufacture is realized.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a single nozzle multi-material multi-scale 3D printing device and a working method thereof. Background technique [0002] New materials (composite materials, metamaterials, functionally graded materials, porous lightweight materials, smart materials, heterogeneous materials, etc.), tissue engineering, biomedicine, MEMS, 4D printing, electronics, flexible electronics (wearable electronic devices, etc.) ), aerospace, automotive and many other fields have huge demands for integrated manufacturing of multi-material, macro / micro / nano multi-scale structures. For example, in the field of biomedicine, to print a device that includes both soft materials that can move with the knee and hard electronic components, the 3D printer should have the following capabilities: seamlessly transition from soft materials to hard materials, integrate different conductivity, I...

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing 3D printing processes are single-material printing, and even some existing multi-material 3D printing processes are mainly based on multi-nozzle technology. However, there are many shortcomings and limitations based on multi-nozzle methods: (1) Cannot realize Active mixing of multiple materials; (2) Precise control of each component of multiple materials cannot be achieved; (3) Seamless transition between multiple materials cannot be achieved (such as seamless transition from soft materials to hard materials); (4) The number of nozzles configured is limited , the number of types of materials that can be printed is limited; (5) The multi-nozzle structure and operation are complicated, and the equipment cost is high; (6) Frequent switching between nozzles is required, and the printing efficiency is low; (7) It is difficult to print high-viscosity liquid materials, which can be printed The types of materials are limited; (8) it is difficult to realize macro, micro, nano span / multi-scale integrated manufacturing; (9) the controllability of 3D printing is very weak

However, the existing multi-material electrojet printing is mainly based on the multi-nozzle scheme, and there are deficiencies and limitations faced by the existing multi-nozzle scheme

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