Metal powder circulating device for basic shaft type metal 3D printer

Abstract

The invention discloses a metal powder circulating device for a basic shaft type metal 3D printer. The metal powder circulating device comprises a powder suction device, a powder screening machine and a metering powder feeding device. A powder storage cylinder of the powder suction device communicates with a feeding port of the powder screening machine through a powder conveying pipe. A first discharging port and a second discharging port of the screening machine communicate with a feeding port of the metering powder feeding device through powder feeding pipes. A discharge port of the metering powder feeding device communicates with the powder supply port through a powder feeding pipe. The metal powder circulating device for the basic shaft type metal 3D printer is simple in structure and convenient to use, the suction head of the powder suction device extends into a printing cavity to recycle metal powder, the recycling treatment effect can be effectively guaranteed, it is guaranteed that redundant metal powder can meet the requirement of next printing, and then, the metering powder feeding device is cooperated for use, and the screened and qualified metal powder is provided for a powder spreading device in / in a powder cylinder of the printing cavity of the SLM metal printer (in the printing chamber).

Description

technical field [0001] The invention relates to the technical field of 3D printing equipment, in particular to a metal powder circulation device for a shaft-type metal 3D printer. Background technique [0002] Metal 3D printing technology has the advantages of personalized design, fast forming, and short manufacturing cycle. It is very suitable for the manufacture of small batches, personalized metal parts with complex surfaces and internal structures. In the process of 3D printing metal powder, high energy density The laser directly acts on the metal powder, and the laser scans quickly to make the metal powder melt and condense quickly. [0003] After the metal 3D printer finishes printing, it is necessary to recycle the excess metal powder so that the excess metal powder can be used in the next printing. It is necessary to ensure the effect of recycling so that the excess metal powder can meet the requirements of the next printing; Before the metal 3D printer prints, befo...

AI Technical Summary

Problems solved by technology

[0005] However, the structure of the device is fixed, and the position of the suction head cannot be adjusted, resulting in a poor effect of recovering and absorbing powder. At the same time, the overall installation firmness needs to be improved, and there are certain limitations in use.

[0006] During the use of metal 3D printers, it is necessary to continuously transport the metal powder for printing to the corresponding powder bin to ensure its continuous operation. In order to ensure the smooth progress of printing and to meet different quality requirements, different prints Metal powders of different particle sizes need to be used, so it is necessary to sieve the metal powder delivered to the printer to meet the use requirements of the equipment; at the same time, a large amount of recycled metal powder will be produced after printing, but the particle distribution range of the recycled metal powder wide, it needs to be sieved before it can be used, and the powder sieving machine in the prior art has low powder sifting efficiency and cannot meet the requirements of the printer.

[0007] Metal 3D printers need to continuously transport the metal powder for printing to the corresponding powder bin during use. In order to avoid the waste of metal powder and combine the size of the printer’s powder storage bin, quantitative powder feeding is generally used in the actual work process. Inject metal powder, but the filling equipment used in the prior art needs to use a large number of electronic components on the one hand, resulting in high complexity and high price of the equipment; Intermittent powder feeding method, low powder feeding efficiency

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