Airtight powder screening system and method for metal 3D printer

Abstract

The invention discloses an airtight powder screening system and method for a metal 3D printer. The airtight powder screening system for the metal 3D printer comprises a feeding mechanism, a vibratingpowder screening mechanism, a powder collecting mechanism and a control module, wherein the feeding mechanism, the vibrating powder screening mechanism, the powder collecting mechanism and the controlmodule are sequentially arranged from top to bottom. The feeding mechanism is used for conveying the metal powder to the vibrating powder screening mechanism. The vibrating powder screening mechanismis used for conducting vibrating screening on metal powder. The powder collecting mechanism is used for collecting and storing the metal powder obtained after vibrating screening. The feeding mechanism, the vibrating powder screening mechanism and the powder collecting mechanism are connected in an airtight manner, so that the feeding process, the vibrating powder screening process and the collection and storage process of the metal powder are conducted on a sealed path isolated with the atmosphere. By the adoption of the airtight powder screening system and method for the metal 3D printer, the metal powder screening stability is greatly improved, the powder screening speed is greatly improved, the powder is effectively prevented from being polluted, and the service lives of a screening net and other components are prolonged.

Description

technical field [0001] The invention relates to a metal powder screening device, in particular to an airtight powder screening system and method applied to a metal 3D printer. Background technique [0002] Metal 3D printing technology has the advantages of personalized design, fast prototyping, and short manufacturing cycle. It is very suitable for the manufacture of small batches, individualized metal parts with complex surfaces and internal structures. In the process of 3D printing metal powder, the high-energy-density laser directly acts on the metal powder, and the laser scans quickly to make the metal powder quickly melt and then quickly condense, so the 3D printing of metal is often accompanied by splashing, spheroidization and other phenomena. The metal powder is mixed with the splash particle pollutants. The diameter of the powder directly affects the accuracy and strength of the printed parts. The splash particle pollutants in the recycled metal powder will reduce t...

AI Technical Summary

Problems solved by technology

In the process of 3D printing metal powder, the high-energy-density laser directly acts on the metal powder, and the laser scans quickly to make the metal powder quickly melt and then quickly condense, so the 3D printing of metal is often accompanied by splashing, spheroidization and other phenomena. The metal powder is mixed with the splash particle pollutants. The diameter of the powder directly affects the accuracy and strength of the printed parts. The splash particle pollutants in the recycled metal powder will reduce the quality of the printed parts. Therefore, the screening system is to ensure the printing quality. important preprocessing step

[0003] Because the metal powder is easy to be polluted, and the traditional structure lacks the gas tightness of the overall mechanism, it is easy to cause pollution of the sieved material and affect the product quality; the lack of a protection mechanism for the metal powder in the traditional structure will make the metal The powder generates static electricity or is oxidized during the sieving process, which greatly reduces the product quality

Images