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Liquid phase laser three-dimensional printing system and method based on nanoparticles

A nanoparticle and laser three-dimensional technology, applied in the field of 3D printing, can solve the problems of increased powder adhesion, rough surface of the processing structure, insufficient internal bonding, etc., to achieve high printing resolution and printing accuracy, reduce laser power, The effect of high-efficiency printing

Inactive Publication Date: 2014-12-03
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

However, at present, the processing resolution of these two methods can only reach about 40 μm (see P. Regenfuss et al., Rapid Prototyping Journal, 2007, 13, 204-212), and the surface of the processed structure is rough, and the internal bonding is not tight enough, so it is difficult to meet the complex and small three-dimensional Fabrication needs of the structure
Due to the increased adhesion, poor fluidity, and difficulty in powder spreading of small-scale powders, this limits the development of higher resolution and higher precision laser 3D printing technology

Method used

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  • Liquid phase laser three-dimensional printing system and method based on nanoparticles
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Embodiment 1

[0047] Combine the following figure 1 and figure 2 , the present invention will be described in detail by taking the nanoparticle-based liquid-phase laser three-dimensional printing system and method of gold structure as an example. The selected gold nanoparticles have a particle size of 5 nm.

[0048]First, use computer graphics software to establish a geometric model, slice and layer the data, and plan the scanning path.

[0049] Put the liquid containing the gold nanoparticles to be printed into the liquid pool 1 .

[0050] Adjust the moving stage 9 to adjust the upper surface of the carrier substrate 7 placed on the stage 8 to a position close to the upper surface of the liquid in the liquid pool, and to be on the focused laser focal plane.

[0051] A 532nm green laser is selected as the laser light source 2, and the laser power is 20-100mW. Using laser optical tweezers, the gold nanoparticles in the solution move to the laser focus and fuse under the action of light ...

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Abstract

The invention relates to a liquid phase laser three-dimensional printing system and a liquid phase laser three-dimensional printing method based on nanoparticles. The system comprises a laser light source, a transmission control unit, a scanning focusing unit, a monitoring device, a liquid tank, a bearing substrate, an objective table, a moving table and a computer. The method comprises the following steps: establishing a geometrical model by utilizing computer drawing software, slicing and delaminating data, and planning a scanning path; putting liquid which contains to-be-printed nanoparticles into the liquid tank; adjusting the moving table, adjusting the upper surface of the bearing substrate placed on the objective table to a position which approaches the upper surface of the liquid in the liquid tank, so as to be positioned on the laser focusing plane after focusing; enabling the nanoparticles in the solution to move towards a laser focus by utilizing the action of laser tweezers, and generating fusion under the photothermal action, so as to form single-layer structures by virtue of laser scanning; lowering the objective table by the thickness of one single-layer structure, and scanning the other single-layer structure until the design structure is printed; taking out the printed structure, and cleaning residual nanoparticles on the surface of the structure.

Description

technical field [0001] The present invention relates to the technical field of 3D printing, in particular to a liquid-phase laser three-dimensional laser printing system and method based on nanoparticles Background technique [0002] The development towards miniaturization and functional integration is an important trend in the development of structures and devices. The reduction of structure and device scale and the integration of functions all depend on the improvement of processing resolution and precision. Conventional subtractive manufacturing technology is difficult for some small structures, especially complex small structures. In contrast, laser 3D printing technology is a flexible, simple and designable structural additive manufacturing method, which can realize the direct manufacture of any 3D structure. Selected area laser sintering and selected area laser melting are two high-precision laser 3D printing methods currently developed. However, at present, the pro...

Claims

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Application Information

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IPC IPC(8): B29C67/00
Inventor 段宣明曹洪忠徐佼曹良成刘基权
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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