Multi-material digital light processing (DLP) three-dimensional printing method and printing equipment thereof

Abstract

The invention provides a multi-material digital light processing (DLP) three-dimensional printing method and printing equipment thereof. The core of the multi-material DLP three-dimensional printing method lies in the multi-trough switching technique, that is, two or more resin troughs containing different kinds of photosensitive resin are arranged below a model building table, and the resin troughs are installed on a horizontal motion mechanism controlled by a motor. Each resin trough can be directly moved to the position below the building table when needed. After printing of one material is completed, the resin trough containing another material is horizontally moved to the position below the building table, the material replaces the original material to continue to receive irradiation of a projector, and thus printing operation can be continued. The overall arrangement of the multi-material DLP three-dimensional printer is conducted according to a lower exposure type three-dimensional printing system, the single trough structure and the motion mode of existing DLP three-dimensional printing equipment are converted into a multi-trough structure, printing of various resin materials can be conducted so that individual requirements of models can be met, and accordingly the application range of the DLP three-dimensional printing technology is broadened.

Description

technical field [0001] The invention relates to a multi-material DLP three-dimensional printing method and a printing device based on the method. The printing device includes a mechanical structure component, a control system and a DLP projection system. The invention belongs to the field of three-dimensional printing rapid prototyping manufacturing (rapid additive manufacturing technology). Background technique [0002] Three-dimensional printing or rapid prototyping (RP) technology is an advanced manufacturing technology developed in the late 1980s and early 1990s. It is an additive manufacturing technology based on the idea of ​​discrete accumulation, a "bottom-up" material additive manufacturing method, that is, through computer technology, the material is connected and accumulated layer by layer according to the three-dimensional digital model of the part, so as to manufacture the entity. Component. The manufacturing process is reduced from complex three-dimensional p...

AI Technical Summary

Problems solved by technology

[0006] At present, most DLP 3D printers on the market are bottom-exposure 3D printing systems, and can only use one photosensitive resin material for printing operations, and cannot use multiple photosensitive resin materials for printing at the same time, which seriously restricts the popularization and application of this technology

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