Equipment for manufacturing three-dimensional objects and its powder feeding device

Abstract

A device for manufacturing three-dimensional objects and its powder feeding device, wherein the powder feeding device includes a powder feeding box with an opening at the bottom, a powder drive, a roller with several grooves, and a drive for driving the rotating motion of the roller mechanism, the powder driver is set in the powder feeding box, the roller is set at the bottom opening of the powder feeding box, and through the close fit with the bottom opening of the powder feeding box, the powder in the powder feeding box Under the action, it falls from the groove of the roller to realize powder feeding. Under the action of the powder driver, the powder of the present invention not only enhances the fluidity, but also obtains the effect of downward pressure, which makes the powder more continuous The ground falls into the groove of the roller, which further ensures that the powder in the groove is filled. Therefore, the equipment for manufacturing three-dimensional objects and its powder feeding device of the present invention ensure the stability of powder feeding.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a device for manufacturing a three-dimensional object and a powder feeding device thereof. Background technique [0002] Additive Manufacturing technology (Additive Manufacturing, referred to as AM) is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast speed, and rich and diverse material types. The degree of limitation does not require any tooling and molds, so the application range is very wide. As one of the additive manufacturing technologies, Selective Laser Sintering (SLS) has developed very rapidly in recent years. Its main process is: the powder feeding device sends a certain amount of powder to the work surface, and the powder spreading device Spread a layer of powder material on the upper surface of the formed part of the piston, and the...

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Problems solved by technology

[0003] In the prior art, the powder feeding device is generally divided into upper powder feeding and lower powder feeding. The upper powder feeding includes the powder feeding box and the roller arranged under the box. The rotating motion makes the powder in the groove fall to complete the powder feeding. Although this powder feeding method has the advantages of occupying a small space and adding raw material powder at any time, the disadvantage is that due to the poor fluidity of the powder, the powder in the groove does not Filling, resulting in a lack of powder feeding volume, which in turn affects the technical problem of powder feeding stability

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