Powder supplying and spreading device

Abstract

The invention discloses a powder supplying and spreading device, and belongs to the field of additive manufacturing. The powder supplying and spreading device comprises a powder storage chamber, a powder supplying roller, a powder spreading roller, a level detector and a power device. The powder supplying roller is of a rotor structure. The powder spreading roller is cylindrical. The powder supplying roller comprises a first powder supplying rotor, a first powder storage tank, a second powder supplying rotor and a second powder storage tank. The first powder storage tank and the second powderstorage tank are arranged at the bottom end in the powder storage chamber and are higher than the powder spreading roller. The first powder supplying rotor and the second powder supplying rotor are mounted in the first powder storage tank and the second powder storage tank separately, and the first powder supplying rotor and the second powder supplying rotor and the first powder storage tank and the second powder storage tank are symmetric to the powder spreading roller. The first powder supplying rotor and the second powder supplying rotor are provided with powder feeding blades fixed to thepowder supplying rotors at equal intervals. By the adoption of the rotor structures with the powder feeding blades, quantitative powder supplying and spreading can be achieved, the powder supplying amount is increased, and the efficiency is improved; and the cylindrical powder spreading roller is adopted, powder outlets are formed in the powder spreading roller, uniform powder spreading can be achieved, and the powder spreading quality is improved.

Description

technical field [0001] The invention relates to the field of additive manufacturing, and relates to a 3D printer, in particular to a powder supply and spreader for the 3D printer. Background technique [0002] Additive manufacturing is the processing of parts through layered scanning. During the processing, every time a layer is processed, the workbench is lowered by one layer thickness, and a certain amount of powder is sent out by the powder supply and spreader, and then the powder is spread evenly by the powder spreader, and then the layer of powder is sintered by laser. This process is repeated continuously, and finally the processing is completed. [0003] In the field of additive manufacturing, that is, 3D printing technology, solving the problem of powder supply and spreading has always been a hot spot in the research of 3D printing technology. The various powder supply and spreading devices proposed on the market are not suitable for use due to various deficiencies....

AI Technical Summary

Problems solved by technology

[0003] In the field of additive manufacturing, that is, 3D printing technology, solving the problem of powder supply and spreading has always been a hot spot in the research of 3D printing technology. The various powder supply and spreading devices proposed on the market are not suitable for use due to various deficiencies. It has been difficult to meet the ideal effect

If some powder supply and spreading devices are designed separately, powder is spread while external powder is supplied, which will undoubtedly increase the structure and equipment volume, resulting in an increase in equipment cost, and it is also difficult to achieve a good powder spreading effect; some devices will supply powder Combining powder spreading, the initial idea is of course to improve the efficiency and improve the quality of powder spreading. Some use a single scraper, but it is difficult to improve the quality of powder spreading; some use double scrapers, but due to some shortcomings in the design The scraper is easily damaged, such as encountering hard particles; most devices do not dig deeply for quantitative powder supply, resulting in waste of powder

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