Light-curing 3D printer, light-curing 3D printing method and device

Abstract

The invention discloses a photocuring 3D printer, and a photocuring 3D printing method and device. The photocuring 3D printer comprises a DMD projection unit array, wherein the DMD projection unit array is connected with a light source generator and comprises at least two DMD projection units; each DMD projection unit is at started or closed state according to the control command of a master computer. According to the scheme, 3D printing is completed through the irradiation of the DMD projection unit array; the distances from each DMD projection unit to the projected photosensitive resin are almost in parallel, so that the attenuation of an ultraviolet source in the air due to an overlong distance when the ultraviolet source divergently propagates by adopting a single DMD chip to print is avoided; the propagation distance of the ultraviolet is short in a light path; the ultraviolet source is low in attenuation and photocuring 3D printing can be completed without a large-power light source generator.

Description

technical field [0001] The present invention relates to the technical field of 3D printing, in particular to a photocuring 3D printer, a photocuring 3D printing method and a photocuring 3D printing device. Background technique [0002] Rapid prototyping technology (also known as rapid prototyping manufacturing technology, Rapid Prototyping Manufacturing, referred to as RPM), also known as 3D printing, is a high-tech manufacturing technology based on the material accumulation method. The method of accumulating materials can produce a physical object or a physical model. Due to the advantages of greatly reducing production costs, improving the utilization of raw materials and energy, customizing according to needs, and greatly saving product production time, 3D printing technology has gradually entered the public eye and developed rapidly in recent years. [0003] The basic principle of 3D printing is layered processing and superposition forming, that is, to generate 3D entit...

AI Technical Summary

Problems solved by technology

In this DLP photo-curing 3D printing technology, the output power is limited due to the attenuation of light during air propagation

In order to avoid this problem, the traditional DLP light-curing 3D printer solves the illuminated area by increasing the output power of ultraviolet light or extending the focal length. However, the farther the distance is, the more serious the attenuation of light in the air is. The power of the effective ultraviolet light output from the lens to the resin surface is also attenuated in a certain proportion

On the other hand, in order to obtain a very strong ultraviolet light source, a huge cooling system is required, resulting in an oversized device. Moreover, since this DLP light-curing 3D printer uses a single DMD chip, the intensity of ultraviolet light is strictly controlled. It is impossible to amplify the intensity of ultraviolet light unlimitedly, which seriously restricts the performance and 3D printing effect of DLP light-curing 3D printers.

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