3d printing equipment and method

Abstract

The invention relates to a 3D printing device and method. The 3D printing method comprises the steps that the cured plane of a forming cylinder is coated with a photosensitive working solution through a curtain coating device, the curtain coating device is provided with a solution outlet, and the working solution squeezed out from the solution outlet forms a curtain; the cured plane is uniformly coated with the curtain so that a coating layer can be formed along with relative movement of the curtain coating device and the cured plane; and the height of the curtain is controlled to be smaller than 50 mm in the coating process. The research of the 3D printing device and method shows that it is not the higher the curtain is, the more stable the state of the curtain is in the coating process; and the short curtain such as a curtain with the height smaller than 50 mm meets the requirement and is better in stability, and the space of the 3D printing device can be saved, so that the curtain coating method is more economical and practical.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a 3D printing device and method. Background technique [0002] SLA (stereolithography) technology is based on the photopolymerization principle of liquid photosensitive resin, and is one of the common 3D printing technologies. Commonly used SLA equipment usually includes a light source, a liquid tank for containing photosensitive resin, a controller, and a liftable support platform on which a molding cylinder (also known as a working cylinder or manufacturing cylinder) is placed. During 3D printing, the liquid photosensitive resin is filled in a liquid tank, and the light beam is controlled to scan on the resin liquid surface. The scanning trajectory and the presence or absence of the light spot are controlled by the controller. Where the light spot is irradiated, the liquid is cured. At the beginning of curing, control the depth of a layer thickness under the curing plane o...

AI Technical Summary

Problems solved by technology

[0005] However, the curtain coating method adopted by Materialize has the following problems in the actual process: 1. Before the coating starts, a long initial distance is required to make the curtain reach a stable state; 2. The formed curtain is easily affected by air resistance

The former makes the light curing equipment have to set up a larger space to accommodate the initial distance, and the latter makes the designers have to design a protective cover in the coating device to reduce the influence of air resistance, but these solutions make the curtain The economics and practicality of conventional coating methods are greatly reduced

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