High-quality powder recovery device

Abstract

The invention discloses a high-quality powder recovery device. The device comprises an annular working table and supporting legs, wherein the supporting legs are arranged at the bottom of the annularworking table; vibration motors are arranged at the two ends of the annular working table, and output shafts of the vibration motors are provided with a screening box; a left cavity, a powder screening cavity and a right cavity are arranged in the screening box respectively; an air inlet pipe is arranged at the upper end of the screening box, and an air outlet pipe and powder outlet pipes are arranged at the bottom of the screening box; an air inlet hole is formed in the bottom of the left cavity, an air outlet hole is formed in the upper end of the right cavity, and a first screen, a secondscreen and a third screen are sequentially arranged in the powder screening cavity from top to bottom; a stirring box is arranged above the screening box, a first motor is fixed at the upper end of the stirring box, an output shaft of the first motor is connected to a stirring shaft, and a plurality of stirring rods are arranged on the stirring shaft; a grinding box communicating with the stirringbox is arranged at the upper end of the stirring box, two grinding wheels are arranged in the grinding box side by side, and gears meshed with each other are arranged at one ends of the grinding wheels; and a second motor is arranged on the side surface of the grinding box, and a powder feeding pipe is arranged at the upper end of the grinding box. According to the high-quality powder recovery device, the purity of the recovered powder is improved, and the storage period and the storage quality of the powder are prolonged.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a high-quality powder recovery device. Background technique [0002] The laser rapid prototyping technology of metal powder is an effective way to manufacture complex parts, among which selective laser melting is one of the technologies with the most development potential. The selective laser melting technology combines CAD three-dimensional modeling, computer management The related technology uses CAD to establish a three-dimensional solid model, slices the three-dimensional solid model, imports the layered slice contour data into the computer, melts and solidifies the selected area layer by layer through laser, and accumulates layer by layer to finally form a solid part. [0003] Selected area laser melting is used to spread sufficient powder raw materials on the forming workbench by the internal powder spreading mechanism during work, and sinter them with lasers. After the forming i...

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Problems solved by technology

[0003] Selected area laser melting is used to spread sufficient powder raw materials on the forming workbench by the internal powder spreading mechanism during work, and sinter them with lasers. After the forming is completed, a large amount of powder raw materials will be left on the internal workbench. Storage, when the powder is enough, put it into the vibrating sieve for screening, separate the powder raw material from the smoke and other impurities after sintering, there are many problems in the conventional recovery method, the high-temperature smoke and dust during part processing fall into the powder After cooling, it is bonded to the powder, and the vibrating sieve cannot completely separate it. The powder raw material is placed in the vibrating sieve to contact with the water vapor in the air, and finally it is recycled to the steel cylinder together with the air. As the storage time increases, the powder in the steel cylinder undergoes an oxidation reaction with the air. And go bad

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