Photocuring type 3D printing device

Abstract

The invention provides a photocuring type 3D printing device. The photocuring type 3D printing device comprises a shell, a lifting platform, a driving mechanism and an optical system. Liquid photosensitive resin used for workpiece forming is contained in the shell, and the interior of the shell is a low-air-pressure environment. The lifting platform is arranged in the shell and used for bearing aformed workpiece. The driving mechanism drives the lifting platform to do lifting motion. The optical system is positioned below the shell and can form a light beam pattern through irradiation, so that the layer of photosensitive resin at the bottom in the shell is controllably cured.

Description

technical field [0001] The invention relates to a three-dimensional (3D) printing device, in particular to a light-curing 3D printing device. Background technique [0002] 3D printing technology is based on the computer three-dimensional design model, the model is layered by software, and metal powder, ceramic powder, plastic, cell tissue and other special materials are piled up and bonded layer by layer by means of laser beams and hot-melt nozzles. Overlay molding to create a physical product. Unlike the traditional manufacturing industry that uses molds, turning and milling and other mechanical processing methods to shape and cut raw materials to produce final products, 3D printing transforms a three-dimensional entity into several two-dimensional planes, and produces by processing materials and superimposing them layer by layer. The manufacturing complexity is greatly reduced. This digital manufacturing mode does not require complex processes, huge machine tools, or a l...

AI Technical Summary

Problems solved by technology

Under the dual effects of the resistance formed by the atmospheric pressure and the inherent adhesive force between the photocurable resin and the bottom of the liquid tank, it is difficult to lift the cured resin together when the lifting platform 130 is lifted, and part of the cured resin will remain on the bottom of the liquid tank 110 , resulting in defects in the molded workpiece

The inherent adhesion between the photocurable resin and the bottom of the liquid tank 110 can be alleviated by adding a non-stick layer on the bottom of the liquid tank 110, but when the exposure area is large, the atmospheric pressure will cause the bottom of the liquid tank 110 to contact The main reason why it is difficult to separate the layer and the cured resin, especially when entering the micro-nano scale, the contact layer is extremely demanding, and hard materials such as glass must be used as the contact layer, and the pressure caused by atmospheric pressure cannot be released through peeling. the problem is more obvious

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