High-precision large-format solid projection 3D printing system and printing method thereof

Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a high-precision large-format solid projection 3D printing system and a printing method thereof. A light path projected out of a DLP optical projector is reflected and projected through a thin film light splitter to enter a projection lens, the projection lens projects the light path to the interfacial surfaceof a thin film and resin in a resin tank, a laser displacement meter is arranged on one side of the projection lens, an image controller is arranged on one side of the thin film light splitter, a monitoring light path of the image controller coincides with the projection light path reflected through the thin film light splitter, a sample table is located in the resin tank, the thin film is arranged in the resin tank, a mobile control system controls the resin tank, the sample table and the thin film to move, a three-dimensional geometric model is cut into a two-dimensional picture, the picture is read by a printing system in sequence and is projected to the interfacial surface of the thin film and the resin, exposure is carried out to form a curing layer, the sample table descends and isseparated from the thin film, and repeated exposure is carried out in sequence; and high-precision large-format machining capacity is achieved, and he advanced precise cutting-in means is provided forthe micro-machining field.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a high-precision large-format stereoscopic projection 3D printing system and a printing method thereof. Background technique [0002] Stereolithography (printing) first appeared as a rapid prototyping technology. Rapid prototyping technology or 3D printing technology refers to a series of technologies that directly generate full-scale prototypes from computer models, which are much faster than traditional mechanical cutting processes. Since Chuck Hull invented stereolithography in 1986, it has played its role economically and quickly in many fields, such as the visualization of complex parts, the error detection of initial design, the verification of the design function of important initial parts, and the verification of theoretical design. In the past few decades, with the investment in micro-electromechanical systems (MEMS), micro-scale stereolithography has em...

AI Technical Summary

Problems solved by technology

However, these technologies are based on laser spot scanning in series on or inside the resin liquid, which greatly affects printing speed and cost economy.

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