A multi-source large-scale surface exposure 3D printing method

Abstract

The invention relates to the technical field of intelligent control and image processing, in particular to a multi-source large-scale face exposure 3D printing method. Increasing the printing area of a face exposure 3D printer is the purpose of the method, and the method comprises the following steps that searching of a maximum slice is conducted, wherein all slices in a model are traversed, and the slice with the maximum exposure area is sought; reference point obtaining is conducted, wherein the outline of the slice with the maximum exposure area is obtained, and the upper left corner point and the lower right corner point of the exposure area are determined to serve as two reference points according to the outline; an external rectangle is made in the exposure area of an original slice according to the reference points and cut, the total area needing to be exposed is obtained, the cut area is isometrically amplified with the width and height of the area needing to be exposed as the maximum limit, and the amplified image is fused with a black background with the total exposure size; and the slice is cut and processed according to the number and placing positions of projectors, and then the slice is stored. According to the multi-source large-scale face exposure 3D printing method, the exposure size can be increased, and meanwhile transportability and printability are achieved.

Description

technical field [0001] The invention relates to intelligent control and image processing technology, in particular to the processing of pictures projected by projectors, by using a plurality of projectors and processing slices according to their numbers and placement positions, thereby realizing multi-source large-scale image processing Research and realization of exposure 3D printing method. Background technique [0002] The 3D printer was born in the mid-1980s and was first invented by American scientists. 3D printer refers to a device that uses 3D printing technology to produce real three-dimensional objects. Its basic principle is to use special consumables (glue, resin or powder, etc.) Each layer of powder is bonded and molded to finally print a 3D entity. Rapid prototyping technology is widely used in model making in the product development stage because of its fast processing speed and low cost. 3D printing is a kind of rapid prototyping technology. It first conver...

AI Technical Summary

Problems solved by technology

DLP technology is similar to a projector, the core component of which is the DMD chip. The biggest advantage of DLP is that it can be exposed layer by layer, which is theoretically very fast. However, if a larger format is required and the high power density of the curing light is required, Therefore, the light intensity has to be greatly increased, but the DMD cannot withstand too high light intensity. At the same time, after the light intensity increases, the system heat dissipation problem is serious.

Therefore, the current 3D printing based on DLP technology is developing slowly in the direction of processing format.

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