Three-dimensional printing method

Abstract

The invention provides a three-dimensional printing method. The three-dimensional printing method comprises the following steps that a wavelength-absorption rate relationship of liquid-state formed materials is obtained, wherein the relationship includes absorption rate peak values of at least two corresponding wavelengths; a three-dimensional printing device is used for forming a three-dimensional object, wherein the three-dimensional printing device provides first light, so that the liquid-state formed materials are cured layer by layer and stacked into the three-dimensional object, and thewavelength of the first light is one of the at least two corresponding wavelengths; and then second light is provided by a post-curing device to irradiate the three-dimensional object, wherein the second light has the at least two corresponding wavelengths.

Description

technical field [0001] The invention relates to a three-dimensional printing method. Background technique [0002] With the increasing development of science and technology, many different methods for constructing physical three-dimensional (3-D) models using additive manufacturing technology such as layer-by-layer modeling have been proposed. In general, additive manufacturing technology converts design data from a 3D model constructed using software such as computer-aided design (CAD) into a plurality of thin (quasi-2D) cross-sectional layers stacked in series. [0003] A number of ways have been developed to form multiple thin cross-sectional layers. For example, photopolymer is used as a liquid molding material for most three-dimensional printing devices. By setting a moving platform in the liquid molding material, the X-Y-Z coordinates constructed according to the design data of the 3D model drive the light source to move along the X-Y coordinates to illuminate the liq...

AI Technical Summary

Problems solved by technology

[0004] However, in the actual production process, the liquid forming material will have absorptivity corresponding to different light wavelengths due to its material characteristics, that is, the absorptivity of the liquid forming material for light will change with the different wavelengths of light, so only a single The wavelength of light cannot make the liquid molding material reach a fully solidified state

For the three-dimensional printing device, except that it uses a single-wavelength curing light source, the curing light source cannot cover all the wavelengths of light that allow the liquid molding material to be solidified, not to mention that the liquid molding material also has absorptivity corresponding to different wavelengths. , so it is easy to exist that the three-dimensional object cannot be completely solidified, and thus reduces the quality of three-dimensional printing

Images