Post-treatment method for printed intermediate of stereo lithography appearance 3D printed piece

Abstract

The invention discloses a stereo lithography appearance 3D printing post-treatment method. The method has the advantages that operation is simple, the characteristics of the printed intermediate which is not completely cured after stereo lithography appearance 3D printing are utilized, in the post-treatment process, namely in the process of completely curing the printed intermediate, the printed intermediate is attached to a post-treatment module, so that a surface structure on the post-treatment module can be formed on the surface of the printed piece, the texture and roughness of the surface of the printed piece are increased, or the surface characteristics are changed, subsequent processing of the printed piece is facilitated, or the predetermined design function of the printed piece is achieved, in addition, the shape and the surface structure of the post-treatment module are customized according to the printed piece, and different production requirements are met.

Description

technical field [0001] The invention relates to the technical field of three-dimensional molding, and in particular to a post-processing method for printing intermediates of light-cured 3D printed parts. Background technique [0002] Stereo Lithography Appearance (SLA or SL) mainly uses photosensitive resin as raw material, and utilizes the property that liquid photosensitive resin can be cured rapidly under the irradiation of laser beam of specific wavelength and intensity. The photosensitive resin is generally a liquid, and the light source generally uses ultraviolet light. Usually, the photosensitive resin causes a polymerization reaction under the irradiation of ultraviolet light of a specific wavelength (250nm-400nm), and completes curing. [0003] Although the photocuring reaction in photocuring molding is the photosensitive resin, in order to meet the requirements of the 3D printing process and improve the performance of the material, other materials will be added to ...

AI Technical Summary

Problems solved by technology

There are many reasons for the existence of uncured and / or partially incompletely cured material components in the printing intermediate. One of them may be that part of the photosensitive resin material is not fully cured due to the high speed of photocuring 3D printing and incomplete photocuring reaction. Another possibility is that the original printing material contains material components that cannot be cured by light, and these material components can only be further cured in subsequent curing reactions

The overall structural strength of the printing intermediate is low, and the surface has a certain degree of viscosity, so it often needs to be further cured

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