Centrifugal supplying and vibrating compaction device and method for powder for 3D printing

Abstract

The invention discloses a centrifugal supplying and vibrating compaction device and method for powder for 3D printing. The device comprises a centrifugal powder spreading device arranged in a molding chamber, a powder supplying mechanism for conveying the powder to the centrifugal powder spreading device and a liftable three-dimensional vibrating molding platform arranged below a powder spreading workbench; the whole centrifugal powder spreading device adopts a cylindrical structural which is rotatable and capable of moving in the plane above a workpiece molding area of the three-dimensional vibrating molding platform; openings in the upper end and the lower end of the centrifugal powder spreading device are gradually expanded, the opening in the upper end is a powder receiving port, the opening in the lower end is a powder scattering port, a screen is mounted in the powder scattering port, and the centrifugal powder spreading device is used for spreading received powder in the workpiece molding area of the three-dimensional vibrating molding platform. With the device and the method, the powder spreading process can be uniform and consistent, spread powder particles are more compact, and the density and the surface roughness of molded pieces are improved.

Description

technical field [0001] The invention relates to the field of 3D printing equipment, in particular to a 3D printing powder centrifugal supply and vibration compacting device and method. Background technique [0002] 3D printing technology is a kind of rapid prototyping manufacturing technology. It is directly based on the three-dimensional solid model data of the product. After computer processing, the three-dimensional solid model is converted into the superposition of many plane models, and finally the product is printed layer by layer under the control of the computer. In particular, electron beam melting (EBM) technology, which uses electron beams to melt metal powder layer by layer to form dense parts, has the advantages of high energy utilization, fast processing speed, low operating cost, and high vacuum protection. It has become a high-performance Ideal rapid manufacturing technology for complex powder metallurgy parts. One of the key indicators of electron beam melt...

AI Technical Summary

Problems solved by technology

And for each powder layer, the existing method of only using a scraper powder layer cannot promote a more compact combination between the powder layer and the powder layer in the vertical direction

And the traditional method of simply using the scraper cannot ensure the uniformity and consistency of the metal powder particles spread on the working substrate due to the selection of the scraper material and the design of the shape.

Images