3D projection type photocuring 3D printing machine

A 3D printer and stereoscopic projection technology, applied in the direction of additive processing, etc., can solve problems such as time-consuming and long printing time

Active Publication Date: 2016-01-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since these 3D printing technologies are all realized by layer-by-layer printing, as the layer thickness decreases, the number of printing layers increases, and the printing time is very long. Usually, the printing process takes several hours.

Method used

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  • 3D projection type photocuring 3D printing machine

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Embodiment Construction

[0021] First of all, it must be pointed out that this embodiment is only used to further illustrate the present invention, and should not be construed as limiting the protection scope of the present invention.

[0022] The overall device such as figure 1 As shown, the Z-axis focusing vibrating mirror 6 adopts a voice coil motor during assembly, and the reciprocating vibration frequency is greater than 20 Hz; the resin tank 1 is filled with transparent photosensitive resin 2 . The present embodiment adopts the laser device 7 that emits the green laser of 532nm, the photosensitive resin material selects SOMOS material, and the threshold is 50mw / cm 2 . Both the Z-axis focusing galvanometer 6 and the XY scanning galvanometer 5 are coated. Before printing starts, use 3D software on the computer to process the STL 3D model (with a diameter of 100mm and a height of 200mm) in layers along the Z-axis direction, with a layer thickness of 0.1mm, and obtain a series of The x,y scan of ...

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Abstract

The invention discloses a 3D projection type photocuring 3D printing machine which comprises a 3D projection system, a resin box and a laser device controlled by a computer. The 3D projection system is composed of an x-y scanning galvanometer and a galvanometer in the Z axis direction. The resin box is made of a material with the transparent periphery. Photosensitive resin is poured into the resin box in advance. A three-dimensional model is spliced into a two-dimensional face pattern in the Z axis direction according to the molding accuracy. Lasers are controlled by the computer to pass through the Z-axis focusing galvanometer and x-y scanning galvanometer, and a three-dimensional image is formed in the liquid photosensitive resin. The energy density of the laser focus is the highest so that the photosensitive resin can be cured, and due to the fact that the laser energy density of other regions is low, the photosensitive resin still keeps in a liquid state. Through irradiation, the required three-dimensional model is cured in the liquid. Different from an existing layer-by-layer scanning and curing manner, the molding speed is increased greatly, and the molding size depends on the scanning range of the scanning galvanometer.

Description

technical field [0001] The invention relates to an additive manufacturing (ie, 3D printing) device for making a three-dimensional physical model by photocuring in a 3D stereoscopic projection illumination mode, that is, a 3D printing device for 3D stereoscopic exposure photocuring. The entire 3D printing process can be completed in seconds or minutes. Background technique [0002] 3D printing technology is known as the "third industrial revolution" and is widely used in industrial design, medical treatment, teaching, aerospace and other fields. At present, the mainstream technologies of 3D printing technology include stereolithography (SLA), fused deposition modeling (FDM), selective laser melting (SLM), digital light processing (DLP), three-dimensional printing bonding (3DP), etc. [0003] Stereo Lithography Appearance (SLA) is the earliest rapid prototyping process. The light source used in SLA technology is laser, which has the characteristics of single wavelength, small...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C67/00B33Y30/00
Inventor 陈继民
Owner BEIJING UNIV OF TECH
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