Photocuring three-dimensional printer and printing method thereof

Abstract

The invention provides a photocuring three-dimensional printer and a printing method thereof. The photocuring three-dimensional printer comprises a photocuring device, a forming trough used for bearing formed materials, an accommodating cavity and a blocking part; a communicating passage is arranged between the accommodating cavity and the forming trough, the accommodating cavity and the forming trough are obstructed by a connecting wall; tiny ventilating holes are formed in the connecting wall and can be blocked and closed by the blocking part optionally; the accommodating cavity communicates with the forming trough only through the communicating passage and the tiny ventilating holes; and the bottom face of the forming trough is a printing platform. The tiny ventilating holes are controlled to be opened or closed by driving the blocking part, material supplying is controlled by air pressure, increasing of the liquid level height of the formed materials is achieved, and thus three-dimensional printing is completed.

Description

technical field [0001] The invention relates to a rapid prototyping device and a prototyping method thereof, in particular to a three-dimensional printer based on digital light processing technology and a printing method of the three-dimensional printer. Background technique [0002] A 3D printer is a device based on a digital model of a 3D object, using materials such as plastic, liquid photocurable resin, and powdered metal to construct a 3D object by layer-by-layer printing. [0003] Digital Light Processing (DLP) is a new type of projection technology based on Digital Micromirror Device (DMD, also known as digital micro device). The digital micromirror chip is a semiconductor switch. 500,000-1.3 million microlenses are integrated on the CMOS silicon substrate, each microlens represents a pixel, when a microlens is in the "on" state, the incident light will be reflected and the image will be projected onto the screen through the projection mirror, when When a micromirror...

AI Technical Summary

Problems solved by technology

[0004] Existing light-curing 3D printers have a molding tank for carrying molding materials. The printing platform is set in the molding tank, and the printing platform is driven by a moving device to achieve vertical translation in the molding tank, so that the material can be gradually distributed in the quantitative molding materials. layer solidification; and the problem existing in the existing light-curing 3D printer is that the printing platform and its device driver exist in the forming tank, and the size of the forming tank is difficult to reduce, resulting in waste of printing materials and waste of space; The material, that is, the movement of the resin liquid will cause the liquid surface to slosh, which will affect the printing work and the accuracy of the finished product

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