Resin coating 3D printing method and system

Abstract

The invention relates to a resin coating 3D printing method and system. The resin coating 3D printing method comprises the steps that a 3D digital model of a sample to be printed is generated, and the3D digital model is cut into an image sequence; an image is controlled to be sent to an exposure system, wherein the exposure system projects the image to the surface of a transparent film through aprojection lens; the exposure system drives light to irradiate the projected image, and a curing layer is generated through exposure; after one layer is printed, the sample descends to be separated from the transparent film, the return distance of a sample table is the printing thickness of a next layer, a film rolling device is controlled to roll or rotate on the surface of the transparent film,a printing material is moved away, the transparent film is flattened, a laser displacement device is controlled to detect the state or position of the transparent film, and if the transparent film isflattened, the film rolling device is controlled to move out of a projection area; and a gap between the sample and the transparent film is filled with resin required for printing the next layer, andexposure printing is repeated in sequence until printing is finished. According to the resin coating 3D printing method and system, the film rolling device is arranged, the transparent film is flattened through the film rolling device, and high-speed and large-format machining can be conducted.

Description

technical field [0001] The invention relates to 3D printing technology, in particular to a resin coating 3D printing method and system. Background technique [0002] Stereolithography was originally conceived as a rapid prototyping technique. Rapid prototyping comprises a range of techniques that can be used to create realistic scale models of production components directly from computer aided design (CAD) in a rapid (and faster than before) manner. Since its disclosure in U.S. Patent 4,575,330, stereolithography has greatly helped engineers visualize complex 3D part geometries, detect errors in prototype schematics, test critical components, and validate at relatively low cost and in faster time frames than previously possible theoretical design. [0003] Over the past few decades, continuous investment in the field of micro-electro-mechanical systems (MEMS) has led to the emergence of micro-stereolithography μSL, which inherits the basic principles of traditional stereol...

AI Technical Summary

Problems solved by technology

Also, for both cases, there is currently no good way to define a 10um or thinner resin layer over an area of ​​5cm x 5cm or larger, especially for the membrane case, even though it is faster than the free surface case , also still unimaginably slow

In the case of a clear window, the fluid forces generated when the two surfaces of the sample and the clear window approach and separate before or after exposure are large enough to damage the sample

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