Continuous light curing three-dimensional printing equipment and use method thereof

Abstract

The invention provides continuous light curing three-dimensional printing equipment and a use method thereof. The continuous light curing three-dimensional printing equipment comprises a shaping platform, a resin tank, a transparent bottom plate, a feeding system, a control system and one or more projection systems, wherein each projection system comprises a light source system, a confluence light path, a digital imaging unit and a projection light path; each light source system comprises at least two independent light emitting units, emitting power of each light emitting unit can be independently controlled, and the emitting spectrums of any two light emitting units are not overlapped; the transparent bottom plate is positioned at the bottom of the resin tank, adopts a rigid flat plate structure, and the Young's modulus of used materials is more than 10GPa; the resin tank is used for loading liquid photosensitive resin including a light initiating agent and a light restraining agent, and the side wall of the resin tank is made from metal, inorganic nonmetal or high molecular materials. Through the adoption of the continuous light curing three-dimensional printing equipment and the use method thereof disclosed by the invention, the three-dimensional light curing process can be continuously performed at a high speed, and the speed and the precision are free from limit of the properties of the transparent bottom plate.

Description

technical field [0001] The invention belongs to the field of three-dimensional printing rapid prototyping, in particular to a high-speed continuous photocuring three-dimensional printing equipment. Background technique [0002] 3D printing technology is to realize the forming of 3D model by accumulating materials layer by layer through automatic numerical control. Compared with traditional processing technology, 3D printing technology does not need to make additional molds, and can directly process finished products, and can quickly obtain complex parts that are difficult to manufacture with traditional processing technologies. Therefore, 3D printing technology can shorten the product development cycle, reduce the research and development costs of enterprises, provide more effective technical solutions, and meet the growing individual needs. [0003] The stereolithography technology uses photosensitive resin as the raw material, and the computer-controlled laser scans the a...

AI Technical Summary

Problems solved by technology

[0007] A light-curing 3D printer using a semi-permeable element as a light-transmitting base plate realizes continuous light-curing molding, but the semi-permeable element also acts as a polymerization inhibitor channel, projection optical path, mechanical support structure, chemical container, etc. The role is subject to comprehensive constraints such as molecular permeability, optical transmittance, mechanical strength, surface hardness, chemical stability, etc., so it is difficult to find materials with excellent indicators for semi-permeable components, resulting in final machine performance is limited

In order to meet the requirements of permeability, fluoropolymers are commonly used as semi-permeable components at present, but the elastic modulus of this material is low, and it is easy to bend under stress during the printing process, resulting in deformation of the polymerization inhibition zone and affecting the optical path and imaging quality. This problem is especially evident in the forming process of large-format components

In addition, in order to ensure that the polymerization inhibitor can pass through the semi-permeable element smoothly, it is difficult to add a dense functional coating on the surface of the semi-permeable element for modification and reinforcement, and it is also difficult to control the temperature of the semi-permeable element by heat convection or heat conduction. control

Images