Powder spreading device of 3D printer

Abstract

The invention discloses a powder spreading device of a 3D printer. The device comprises a powder falling part, a powder feeding part and a powder spreading part, the powder falling part comprises a powder falling hopper and a powder storage bin, the powder storage bin comprises an upper end plate, a side baffle, an adjusting plate after powder falling, a side plate, an adjusting plate before powder falling, a spiral shaft and a powder falling assembly fixed support, a powder falling motor is mounted at one end of the side plate, the powder feeding part comprises two powder feeding assembly fixed supports, a powder feeding driving shaft, a powder feeding driven shaft bearing pedestal, and a powder feeding driven shaft, a powder feeding conveying belt is mounted between the powder feeding driven shaft and the powder feeding driving shaft, a powder feeding motor is mounted beside the powder feeding assembly fixed supports, the powder spreading part comprises two powder spreading assemblyfixed supports, a powder spreading cross beam, a powder spreading roller bearing pedestal and a powder spreading motor base, a powder spreading roller is rotatably connected between the powder spreading roller bearing pedestal and the powder spreading motor base, and a powder spreading motor is fixedly mounted on the powder spreading base. Through the above arrangement, powder is not prone to blocking the powder falling opening, and the powder can be evenly spread on the whole powder spreading path at the same time.

Description

technical field [0001] The invention relates to 3D printing equipment, in particular to a powder spreading device for a 3D printer. Background technique [0002] 3D printers, also known as three-dimensional printers, are rapid prototyping equipment that construct three-dimensional entities by layer-by-layer printing based on digital model files. At present, 3D printing technology has gradually matured, developed rapidly and has gradually entered various fields. 3D printers can use three-dimensional printing technology (Three-dimensional printing, 3DP), also known as droplet jet bonding, to achieve printing of different materials, such as using lamination Sand, polystyrene (Polystyrene, PS), precision casting wax powder, nylon, ceramic powder and other powder materials are used as printing powder. Three-dimensional jet printing technology is a kind of additive manufacturing technology, which means that a layer of powder materials (coated sand, wax powder, polystyrene, nylon ...

AI Technical Summary

Problems solved by technology

[0003] However, when the current 3D printers using the top-down powder method print with small-particle powders with poor fluidity such as wax film, there is a problem that when the printing powder falls into the printing cylinder, it is easy to block the powder-feeding port or cannot evenly and simultaneously cover the entire surface. The problem of the powder laying path affects the printing effect

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