An ultra-low oxygen water content atmosphere control device for metal additive manufacturing

Abstract

The invention discloses an ultra-low oxygen water content atmosphere control device for metal additive manufacturing, which belongs to the technical field of 3D printing. An ultra-low oxygen water content atmosphere control device for metal additive manufacturing uses a purification ball and With the cooperation of the isolation cover, the removal of oxygen and water in the air can be carried out simultaneously, improving the efficiency of air purification. The contact between the water in the air and the quicklime can realize the function of reducing the water in the air and release heat at the same time, which can improve the reaction between oxygen and iron powder. Efficiency, the sealing sheet inside the gas storage cylinder reacts with oxygen, the surface of the sealing sheet produces a loose patina, and the strength becomes weaker. Under the extrusion of the air bag, the sealing sheet breaks and disintegrates. At this time, the sealing sheet loses its sealing function to the gas storage cylinder. The carbon monoxide in the gas storage cylinder will leak out to contact the iron oxide, so that the iron oxide will be reduced to iron powder, ensuring that the iron powder can be used for many times and prolonging the validity period of the device.

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 the existing additive manufacturing equipment only has a simple washing function. In this way, the oxygen content of the inert atmosphere is at least 100 ppm, and the water content is at least 200 ppm. If the oxygen and water content are too high, the implant will be reduced. The elongation rate of the powder is increased, and the oxygen and hydrogen content in the powder is increased, 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 ...

AI Technical Summary

Problems solved by technology

[0002] The inert atmosphere control system of the existing additive manufacturing equipment only has a simple washing function. In this way, the oxygen content of the inert atmosphere is at least 100 ppm, and the water content is at least 200 ppm. If the oxygen and water content are too high, the implant will be reduced. elongation, 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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