DLP three-dimensional printer and three-dimensional printing method

Abstract

The invention relates to a DLP three-dimensional printer and a three-dimensional printing method based on a digital light processing technology and a three-dimensional scan technology, wherein the DLP three-dimensional printer comprises a frame, a control unit, a scanning and projecting unit, a scanning molding carrying unit as well as a molding groove mounted on the frame, wherein the molding groove is used for containing a light-cured resin solution; the scanning and projecting unit comprises a scanning light source, a molding light source, a digital micro-lens wafer and a scanning reflective light receiver; the scanning molding carrying unit is used for carrying a scanned object and molding a three-dimensional object in the molding groove; the digital micro-lens wafer is controlled by the control unit to process light generated by the scanning light source and the molding light source so as to correspondingly form scanning light for three-dimensional scanning on the object or molding light for curing the light-cured resin solution in the molding groove. According to the DLP three-dimensional printer, the processing capability of the digital micro-lens wafer on light can be fully utilized, so that the shape and the size of facula of the scanning light beam are no longer limited by the scanning light source.

Description

technical field [0001] The invention relates to a rapid prototyping device and a prototyping method thereof, in particular to a three-dimensional printer and a three-dimensional printing method based on digital light processing technology and three-dimensional scanning technology. 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 for short) is a new type of projection technology based on a digital micromirror device (DMD for short, also known as a digital micro device). The digital micromirror chip is a semiconductor switch. 500,000 to 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 t...

AI Technical Summary

Problems solved by technology

As one of the most commonly used three-dimensional scanners, laser scanners create a point cloud of the geometric surface of the scanned object by scanning the surface of the scanned object, and interpolate these point clouds into the surface shape of the object, that is, the three-dimensional object 3D model, the denser the scanned point cloud, the more accurate the 3D model created. The process of creating the 3D model is called the 3D model reconstruction process. The computer performs layered processing on the reconstructed 3D model. In this process, The support structure can be added manually or automatically by the processing software. The 3D printer then forms a 3D object corresponding to the scanned object based on the layered 3D model. Limited by the light source, laser scanners are commonly used for point measurement. Type and line measurement type; point measurement laser scanner has high scanning accuracy, but the scanning speed is slow, and is usually used for scanning precision parts; line measurement laser scanner has high scanning accuracy and fast scanning speed

[0007] In order to carry out rapid prototyping, it is necessary to purchase a 3D scanner and a 3D printer at the same time, which not only takes up a lot of space, but also costs a lot

In addition, the shape and size of the spot of the scanning beam used in the existing 3D scanners depends on the scanning light source and cannot be adjusted according to the scanning accuracy.

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