Photo-curing 3D printer and 3D printing method

Abstract

The invention relates to the technical field of 3D printing, in particular to a photo-curing 3D printer and a 3D printing method. The photo-curing 3D printer comprises a container filled with photosensitive resin, a transparent film is arranged at the bottom of the container, an optical machine is arranged at the bottom of the container, a printing platform is arranged above the container and connected with a lifting mechanism through a platform support, the lifting mechanism is connected with a printing control module used for controlling the lifting speed, the platform support is provided with a pressure sensor for detecting the pressure of the printing platform, the lifting mechanism is connected with a displacement detection piece for detecting the movement displacement of the liftingmechanism, and the pressure sensor and the displacement detection piece are both connected with the printing control module. The photo-curing 3D printer and the 3D printing method can not only avoid the reciprocating motion of the printing platform, but also can control the deformation degree of the transparent film and improve the printing success rate.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a photocuring 3D printer and a 3D printing method. Background technique [0002] 3D printing is a molding process that produces a three-dimensional model layer by layer. A common light-curing 3D printing technology on the market is called DLP. Each time the light machine irradiates the underlying resin for a period of time, after the resin is cured, the light machine is turned off, the printing platform is lifted, and then lowered to a slightly higher position than before. Turn on the irradiation for the next layer to cure. The reason why the platform needs to move up and down is to fill the liquid viscous material to the solidification surface. This action is time-consuming, which leads to the slow printing speed of traditional DLP. [0003] In the existing high-speed DLP printers, although the reciprocating motion is eliminated, the platform has been rising slowly and at ...

AI Technical Summary

Problems solved by technology

However, this method is not suitable for printing models with continuous large-area slices, and printing failures often occur

The reason for the printing failure is that the material in the center of the large-area slice is difficult to flow into and solidify. When the printing platform is lifted, the light-transmitting film below will be pulled by the draft force and cause deformation, causing the curing surface to rise.

When the deformation of the light-transmitting film is too large, the film will spring back instantly. At this time, the plane of the light-transmitting film suddenly separates from the cured surface. The newly cured material is on the film and cannot be glued to the printed body, causing printing faults and printing failures.

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