Three-dimensional printer and working method thereof

Abstract

The invention provides a three-dimensional printer and a working method of the three-dimensional printer. The three-dimensional printer comprises a printing platform, a powder laying mechanism, an infrared light source and an image formation control mechanism. The printing platform is used for bearing a three-dimensional object. The powder laying mechanism is used for laying a printing material onthe printing platform. The infrared light source outwards emits an infrared light beam. The image formation control mechanism comprises a transparent membrane and a reverse infrared material laying device. A light permeability region and a light-permeability-free region are arranged on the transparent membrane, the shape of the light permeability region and the shape of the section of the three-dimensional object are same, and the light beam emitted by the infrared light source passes through the light permeability region and irradiates the printing material on the printing platform. The reverse infrared material laying device comprises a powder laying device. The powder laying device comprises a powder box and magnetic rollers. The powder box is used for holding a powdery mixture which is formed by reverse infrared materials and electric charge agents. The magnetic rollers support the two ends of the powder box in a rotatable mode, roll on the transparent membrane and lay the mixturein the light-permeability-free region. The three-dimensional printer can increase the printing speed and improve the printing accuracy.

Description

technical field [0001] The invention relates to the field of three-dimensional printing, in particular to a three-dimensional printer and a printing method of the three-dimensional printer. Background technique [0002] A three-dimensional printer is a device that uses rapid prototyping technology to print three-dimensional objects. It is based on a digital model and uses materials such as plastic, liquid photosensitive resin, or powdered metal to print three-dimensional objects layer by layer. The existing 3D printing process is firstly modeled by computer-aided design (CAD) or computer animation modeling software, and then the built 3D model is "partitioned" into layer-by-layer sections, and then the processing path is obtained according to the analysis section information, so that Instructs the printer to print layer by layer. According to different working principles, the rapid prototyping technologies used include melt extrusion molding (Fused Deposition Modeling, FDM)...

AI Technical Summary

Problems solved by technology

[0003] The existing laser selective sintering molding is to solidify the printing material by laser. This laser printing method usually prints one layer line by line, and then prints the second layer. The printing speed is low and the printing accuracy is low.

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