Dot-matrix 3D printing light source utilizing light-emitting diodes

Abstract

The invention provides a dot-matrix 3D printing light source utilizing light-emitting diodes. The dot-matrix 3D printing light source comprises the light-emitting diodes, a mounting support, first collecting lenses and second collecting lenses. The light-emitting diodes are arranged on the mounting support, and primary light emitted by each light-emitting diode is condensed by the unique corresponding first collecting lens to form secondary light. Then the secondary light is converged by the second collecting lenses to form condensation spots. All the condensation spots are located on a straight line and located on a forming plane of powder materials. Power sources of the light-emitting diodes in the same radial direction are controlled to enable the corresponding condensation spots to melt or sinter the powder materials in specific areas. Due to the fact that the electro-optical conversion efficiency of the adopted light-emitting diodes is more than 90 percent, and no air cooling or water cooling is needed, the electro-optical conversion efficiency of the light source adopted in the 3D printing technology with an SLS method can be improved, the service life is long, good heat radiation is achieved, cost is low, and the 3D printing efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a dot-matrix 3D printing light source using light-emitting diodes in the 3D printing technology. Background technique [0002] 3D printing 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] For powdery materials, Selective Laser Sintering (SLS method for short) is usually used. The SLS method uses a laser as an energy source, and most of the modeling materials used are powder materials. During processing, the powder is first preheated to a temperature slightly lower than its melting point, and then the powder is spread into a plane under the action of a scraping stick; the laser beam is selectively sintered according to the information of the layered section under computer control. After the completion, the next lay...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings and deficiencies of low electro-optical conversion efficiency, expensive devices, short service life, and low overall work efficiency of the 3D printing laser light source using the SLS method in the past, the present invention provides a dot-matrix 3D printing light source using light-emitting diodes, which can Improve the electro-optic energy conversion efficiency of the light source used in the 3D printing technology using the SLS method, long life, good heat dissipation, low cost, and higher 3D printing efficiency

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