Ultralow-oxygen-water-content atmosphere control device for metal additive manufacturing

Abstract

The invention discloses an ultralow-oxygen-water-content atmosphere control device for metal additive manufacturing, and belongs to the technical field of 3D printing, according to the ultralow-oxygen water content atmosphere control device for metal additive manufacturing, through cooperation of a purification ball and an isolation hood, oxygen and water in air are removed at the same time, the air purification efficiency is improved, and the air purification effect is improved. When water in the air is in contact with the quick lime, the function of reducing the water in the air is achieved, meanwhile, heat is released, the reaction efficiency of oxygen and iron powder can be improved, a sealing piece in an air storage column barrel reacts with the oxygen, loose verdigris is generated on the surface of the sealing piece, the strength is weakened, and the sealing piece is broken and disassembled under extrusion of the air bag, at the moment, the sealing piece loses the sealing function on the air storage column barrel, carbon monoxide in the air storage column barrel leaks out to make contact with ferric oxide, ferric oxide is reduced into iron powder, it is guaranteed that the iron powder can be used repeatedly, and the validity period of the device is prolonged.

Description

technical field [0001] The invention relates to the technical field of 3D printing, and more specifically relates to an ultra-low oxygen water content atmosphere control device for metal additive manufacturing. Background technique [0002] The inert atmosphere control system of existing additive manufacturing equipment only has a simple washing function. In this way, the oxygen content of the inert atmosphere is at least 100ppm, and the water content is at least 200ppm. If the oxygen and water content are too high, the extension of the implant will be reduced. rate, and increase the oxygen and hydrogen content in the powder, which reduces the number of times the powder is reused and increases the manufacturing cost. [0003] In order to keep the oxygen and water content below 50ppm, it is usually necessary to add an atmosphere control device to further reduce the oxygen and water content in the air inside the 3D printer. Oxygen and water content, with the increase of the u...

AI Technical Summary

Problems solved by technology

[0002] The inert atmosphere control system of existing additive manufacturing equipment only has a simple washing function. In this way, the oxygen content of the inert atmosphere is at least 100ppm, and the water content is at least 200ppm. If the oxygen and water content are too high, the extension of the implant will be reduced. rate, and increase the oxygen and hydrogen content in the powder, reducing the number of times the powder is reused and increasing the manufacturing cost

[0003] In order to keep the oxygen and water content below 50ppm, it is usually necessary to add an atmosphere control device to further reduce the oxygen and water content in the air inside the 3D printer. Oxygen and water content, with the increase of the use time of the device, the dehydration agent and oxygen scavenger in the device continue to consume and cannot be regenerated, and at the same time the contact time between the air in the device and the dehydration agent and oxygen scavenger is short, resulting in the existing atmosphere control The device is used for a short time and the air purification efficiency is low

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