Stepping splicing type 3D printing system and printing method

Abstract

The invention provides a stepping splicing type 3D printing system and a printing method. The system comprises a control system and a 3D printer, wherein the control system is in communication connection with the 3D printer, the 3D printer comprises a fixing platform, a lens fixing column and a printing mechanism, the lens fixing column and the printing mechanism are arranged at the upper end of the fixing platform, the lens fixing column is provided with a photoetching lens corresponding to the printing mechanism in position, an XY-axis movement platform is arranged between the printing mechanism and the fixing platform, and the XY-axis movement platform comprises an X-axis movement mechanism and a Y-axis movement mechanism. The XY-axis movement platform is arranged, so that high printingprecision can be guaranteed, meanwhile, the printing breadth can be increased in a stepping splicing mode, and the splicing error in the splicing process can be effectively avoided.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a step-by-step stitching 3D printing system and a printing method. Background technique [0002] At present, digital micromirror devices (Digital Micromirror Devices, DMD for short) are usually used in the 3D printing technology based on surface projection micro-stereolithography (DLP). DMD microlens arrays are used to provide exposed images. The size of each microlens in the DMD microlens matrix is ​​generally 7-10um, and the printing accuracy depends on the size of the microlens. In the surface projection micro-stereolithography (DLP) 3D printing technology, in order to further improve the precision to the sub-micron level, the DMD image is generally reduced by optical design, that is, the image reflected by the DMD is processed by the projection objective lens. Zoom out to achieve the purpose of improving printing accuracy. Because after the overall image is reduced, although the...

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Problems solved by technology

[0004] In order to improve the printing format under the premise of satisfying the accuracy, the prior art CN201520983708.3 proposes to combine multiple DLP optical machines to achieve this, but the cost of this method is high, and the relative positions between each optical machine need to be precisely adjusted and adjusted. Fixed, not flexible enough to use

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