3D printing powder transfer device, 3D printer and using method

Abstract

The invention discloses a 3D printing powder transfer device, a 3D printer and a using method. The 3D printing powder transfer device comprises a powder storage bin, a buffer device and a gas introduction device, wherein the gas introduction device is located in the powder storage bin, one end of the gas introduction device is connected with the top of the powder storage bin, and the other end of the gas introduction device extends into the bottom end of the powder storage bin and is located above the buffer device; and the gas introduction device is used for introducing inert gas into the powder storage bin. The gas introduction device is arranged to introduce inert gas to be matched with the buffer device to purge powder so as to dry the powder, the powder is prevented from being in contact with air to be oxidized, the powder can be prevented from being blocked at a powder outlet, the dry powder is continuously and stably conveyed into printing equipment, efficient operation of powder laying printing work is ensured, and the production efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a 3D printing powder transfer device, a 3D printer and a use method. Background technique [0002] At present, the feeding method of the upper powder feeding 3D printing system at home and abroad mostly adopts self-gravity dropping to the powder spreading device. The powder is conveyed in the powder mode. When the powder accumulates at the bottom powder outlet, the fine metal powder is easily oxidized and damp during the turnover process, which will make it difficult to open the powder outlet, and even cause the powder outlet control valve to jam and damage. While this type of device leads to a decline in product performance and stability, there is a problem that the powder outlet is blocked due to powder agglomeration, which leads to the problem that the continuous supply of materials cannot be continued, and eventually the printing work stops, which seriously res...

AI Technical Summary

Problems solved by technology

However, there are obvious safety hazards in the use of this device: there is a risk of explosion when the powder in the airtight container is heated, especially when heating active powder such as aluminum powder

In addition, the purge pipe in the cavity of this product is located at the bottom of the powder storage bin, and the range that can be blown away is small. When there is a lot of powder, it is easy to blow the powder, and the powder blowing effect is poor.

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