Digital light processing 3D printer

Abstract

The invention relates to the technical field of printers, and discloses a digital light processing 3D printer. The digital light processing 3D printer comprises a liquid tank, a bottom layer solution,a retaining plate, a projector, a lifting structure, a workbench, a through hole and a photosensitive resin feeding tube. In the digital light processing 3D printer, photosensitive resin is arrangedon an immiscible and heavy liquid. When a photochemical reaction is in progress, a liquid feeding amount of the bottom liquid is slowly controlled by a peristaltic pump at the bottom, so that the height of the photosensitive resin is always maintained in a photochemical reaction layer. The photosensitive resin is lifted up as a molding part is formed, and detached in time when an adhesive force isnot formed, so as to avoid the problems of excessively long stagnation time after a layer reaction, a printed object layer still in the liquid photosensitive resin, and difficult demolding caused byan adhesion between the molding part and the photosensitive resin. The efficiency and success rate of demolding are improved, and the influence of excessive friction on production equipment during demolding is avoided.

Description

technical field [0001] The invention relates to the technical field of printers, in particular to a digital light processing 3D printer. Background technique [0002] 3D printing technology is under the control of computers, based on the principle of "additive manufacturing", three-dimensional accumulation of discrete materials layer by layer, the technology of forming and manufacturing parts prototypes or final products, after decades of development, has developed a variety of The 3D printing technology path is divided into extrusion type, granular material molding, photopolymerization molding and other moldings from the broad categories. Photopolymerization molding mainly includes light curing (SLA), digital light processing (DLP), polymer Injection (PI). [0003] Digital light processing printers use photosensitive resin as the molding material, and irradiate with ultraviolet light to accelerate the molding of the exposed resin. In the actual production of digital light ...

AI Technical Summary

Problems solved by technology

[0003] Digital light processing printers use photosensitive resin as the molding material, and irradiate with ultraviolet light to accelerate the molding of the exposed resin. In the actual production of digital light processing printers, when the resin is sensitively formed layer by layer, each time the layer is changed To separate the molded part from the resin tank, but for each layer printed, the printed object layer is still in the liquid photosensitive resin. When the printing platform moves upwards, it is necessary to overcome the adhesive force between the molded part and the printing platform. The demoulding method will not only affect the molding effect, but also affect the service life of some parts of the printer; moreover, the digital light processing printer uses photosensitive resin as the printing material, and the photosensitive resin is placed in the container, but the object is printed There is no need for so much resin material, and the photosensitive resin exposed to the outside for a long time is easy to harden and can no longer be used. Therefore, it is easy to waste materials when using DLP molding technology to manufacture objects.

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