Powder supplying and spreading method and device for multi-material part 3D printing

Abstract

The invention discloses a powder supplying and spreading method and a powder supplying and spreading device for multi-material part 3D printing. A plurality of powder supplying funnels are used for storing different powder materials and quantitatively supplying the powder materials; powder in each powder supplying funnel drops into a powder equalizer by virtue of gravity; and the powder equalizer is used for uniformly dispersing and dropping powder from each powder supplying funnel into a powder laying box. The two sides of a powder laying box body of the powder laying box are separately provided with a high flexible scraper plate and a low flexible scraper plate; when the powder laying box moves above a forming platform, the high flexible scraper plate is responsible for spreading out powder materials to a position above the platform; and the low flexible scraper plate is responsible for recycling residual powder into a powder collecting box after each powder in the forming layer is molten or sintered. By virtue of the means that gravity is adopted for quantitatively supplying the powder, the high flexible scraper plate is adopted for spreading the powder and the lower flexible scraper plate is adopted for recycling the residual powder, and the like, a simple and practical powder supplying and spreading method, and a simple and practical powder supplying and spreading device are provided for realizing 3D printing of multi-material parts by free point-dependent material selecting.

Description

technical field [0001] The invention relates to the field of 3D printing equipment, in particular to a powder supply and spreading method and device for 3D printing of multi-material parts. Background technique [0002] 3D printing technology, also known as additive manufacturing technology, can quickly manufacture various structurally complex parts based on three-dimensional models. 3D printing technology enables the structural design of parts to be free from the restrictions of traditional manufacturing technology, which improves the manufacturing capacity of the process; at the same time, 3D printing technology also has the advantages of short product development cycle and low research and development costs. 3D printing technology has developed rapidly in recent years, and it has been widely used in medical, automotive, aerospace, art and other industries, and can almost directly form parts of any complex geometry. [0003] Many items in life and industry are made of two...

AI Technical Summary

Problems solved by technology

This method and device can realize the concept of 3D printing molding with free selection of materials according to points, but after each curing in one layer, all materials on the forming platform need to be removed by vacuum adsorption, and the powder supply and powder recovery of each layer will be changed layer by layer. If there are many layers of parts, it will be difficult to realize the 3D printing of parts, and compared with the traditional process, the adsorption recovery action is increased and the forming efficiency is also reduced.

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