A kind of 3d printing equipment and method

Abstract

The invention relates to 3D printing equipment. The 3D printing equipment comprises an irradiation source, a workbench and a liquid tank. The workbench is used for bearing an established 3D body. The liquid tank is used for containing polymerizable liquid of the established 3D body. The 3D printing equipment further comprises a covering plate. The covering plate is located in the liquid tank or at the top of the liquid tank. The irradiation source irradiates from the upper side of the covering plate, and the covering plate is an element transparent to the irradiation source. The lower surface of the covering plate is provided with a covering surface, and the covering surface is kept to make contact with the polymerizable liquid in the printing process. The invention further provides a 3D printing method. According to the technical scheme, new irradiation curing can be performed without scraping flat, and the defects that the liquid level fluctuates, the machine is complex, the speed is low and continuous printing cannot be achieved in a traditional 'from-top-to-bottom' 3D manufacturing technology are overcome.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a 3D printing device and method. Background technique [0002] 3D printing (three-dimensional manufacturing) is a technology based on digital model files to construct three-dimensional objects by printing layer by layer and accumulating layer by layer. In particular, a three-dimensional object is constructed by irradiating photosensitive resin layer by layer with visible light or ultraviolet light, which is generally called stereolithography (SLA). Two techniques are known to achieve SLA: one for adding layers to the upper surface of an object under construction, known as a "top-down" manufacturing technique; the other for adding layers to the lower surface of an object under construction , called "bottom-up" manufacturing technology. [0003] For the "top-down" technology, the Chinese patent application number is 201410795471.6, and the title of the invention is "A Laser 3D Printer ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of 3D printing equipment and method, which utilizes the irradiation source from top to bottom and adopts elements transparent to the irradiation source to fully or partially cover the polymerizable liquid to maintain a stable covering surface, so that there is no need for scraping A new radiation curing step can be carried out to overcome the defects of liquid level fluctuation, mechanical complexity, low speed and inability to print continuously in the traditional "top-down" 3D manufacturing technology

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