3D printer provided with gradient powder feeding system

Abstract

The invention provides a 3D printer provided with a gradient powder feeding system. The gradient powder feeding system is composed of two or more storage devices, a powder distributor and an accuratepowder feeder, wherein one or more partition plates are arranged in the powder distributor. According to the 3D printer provided with the gradient powder feeding system, it can be ensured that two ormore types of powder can always be quantitatively and accurately fed according to a required volume ratio, and it can also be ensured that the gradient change ratio of powder components of each powderspreading layer in a direction perpendicular to the powder spreading direction is always constant; materials with material components continuously changing can be rapidly obtained through subsequentprecise regional laser sintering, data about the tissue, physical performance and mechanical performance of materials with different components can be rapidly obtained, functional gradient material test samples or parts can be rapidly obtained, and a profound influence on research and development of functional materials and new materials is achieved.

Description

technical field [0001] The invention relates to a 3D printer with a gradient powder supply system, belonging to the field of additive manufacturing. Background technique [0002] Gradient materials refer to two or more materials with different properties, which are formed by changing the composition and structure of these materials to make them change gradually without interface. Gradient materials, a novel material design idea, once proposed, immediately attracted the attention of material scientists from all over the world and started research on it. The main preparation methods include powder molding, physical vapor deposition (PVD), and chemical vapor deposition. (CVD), plasma spraying, electroforming, electroplating, self-propagating high-temperature synthesis, etc. These methods all require complex processes or equipment, and the lack of simple preparation methods is an important reason for limiting the further development of functionally graded materials. [0003] Wi...

AI Technical Summary

Problems solved by technology

Patent CN108213425A introduces a powder mixing and uniform distribution method and device for 3D printing of gradient material parts. The steps of mixing and uniform distribution are complicated

[0004] In the patent CN108480630A, a device and method for preparing gradient materials based on selective laser melting technology is introduced. The device includes a laser scanning galvanometer and a powder storage device, a powder mixer, a powder scraper, and a workbench arranged in sequence from top to bottom. In order to realize the gradient change of the material composition on the horizontal plane perpendicular to the powder spreading direction, it only emphasizes that the outlet at the bottom of the powder storage is rectangular, and the section of the powder storage is either a double reverse triangle, or a three-symmetric triangle or a four-combined triangle, but it does not An accurate powder supply device cannot guarantee that various powders will always fall into the powder mixer quantitatively and accurately according to the required volume ratio, so it is difficult to achieve a constant ratio of material composition on the horizontal plane perpendicular to the powder spreading direction. , it is impossible to guarantee a constant or consistent proportion of material composition in the direction of the forming height, which will have an adverse effect on the design and research of gradient materials and the development and application of functionally graded materials.

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