3D printer

Abstract

The invention relates to a printer. A 3D printer comprises a cylinder body, a curing starting switch, a spraying device, a DLP (Digital Light Processing) projector, a piston type worktable and a computer, wherein a storing box of which the upper end is opened is formed between the upper surface of the piston type worktable and the inner surface of the cylinder body; the spraying device comprises a spraying head provided with a spraying port, scrappers, and a driving mechanism which is controlled by a computer and can be used for driving the spraying head to move synchronous with the scrapers; the spraying head and the scrapers are positioned above the piston type worktable; the DLP projector can be used for directly projecting into the storing box from the top of the projecting box; the DLP projector is provided with a light outlet, a light outlet cover, a cover closing spring which can drive the light outlet cover to close the light outlet, and an electromagnet which can drive the light outlet cover to open; the curing starting switch can be triggered when the spraying head moves to an end point of a travel so as to enable the electromagnet to be electrified to generate magnetism. The 3D printer has the advantage that the ultraviolet rays can be directly projected on a resin layer, so that the problem of low utilization rate of the ultraviolet rays of an existing 3D printer can be solved.

Description

technical field [0001] The invention relates to a printer, in particular to a 3D printer. Background technique [0002] A 3D printer is a device that prints based on the cumulative forming technology of the discrete accumulation principle. It integrates computer-aided design (CAD) and computer-aided manufacturing (CAM) with the help of modern means such as computer, laser, precision transmission and numerical control, and can directly manufacture products in a short time according to the three-dimensional model constructed on the computer. model or sample. [0003] There are many ways to form 3D printers. One of them is to use photosensitive resin as the raw material. The 3D model of the part designed on the computer is triangulated on the surface, stored in STL file format, and processed in layers to obtain the cross-section of each layer. The two-dimensional profile information, and then the computer controls the DLP projector to project the two-dimensional profile image...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a 3D printer capable of directly projecting ultraviolet rays onto the resin layer, which solves the problem of low utilization rate of ultraviolet rays caused by the existing 3D printers curing through the bottom wall of the storage box from bottom to top

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