Powder spreading device capable of quantitatively dropping powder

Abstract

The invention discloses a powder spreading device capable of quantitatively dropping powder and relates to the technical field of 3D printing. The powder spreading device comprises a powder spreadingmain body, a rotating drum, an adjusting mechanism, a screening mechanism, a first motor and a second motor. A partition is arranged in the powder spreading main body. A powder storage cavity is formed above the partition. Two powder storage grooves are formed in the outer surface of the rotating drum. The first motor drives the rotating drum to rotate through a driving rotating shaft. The adjusting mechanism changes the powder storage amount of the powder storage grooves under the pushing of a pushing rod. The screening mechanism is driven to move through a driving wheel under the drive of the second motor. Before printing, firstly, the falling amount of powder is adjusted according to metal powder, and after the falling amount of powder is determined, the size of the powder storage grooves is changed through an adjusting mechanism, so that the purpose of changing the falling amount of powder is achieved; and during printing, the screening mechanism is operated, so that metal blocks bonded into blocks are blocked from falling above a screen mesh, the forming surface of the single-layer powder is smoother, and quality defects in parts are eliminated.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a powder spreading device capable of quantitatively dropping powder. Background technique [0002] The metal powder rapid prototyping printer can make a section with a certain micro-thickness and a specific shape each time according to the shape of the part, and then bond the sections of each layer layer by layer to obtain the three-dimensional part that needs to be manufactured. Metal powder Because rapid prototyping printers can directly manufacture solid parts from computer 3D design data without any hard molds, they have been widely used in many fields such as machinery and medical treatment. [0003] In the existing technology, when the powder is stored for too long, it is easy to oxidize with the moisture in the air and bond into blocks. When printing, the bonded metal blocks are directly placed on the molding table for sintering and molding When it is used...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a powder spreading device that can quantitatively drop powder, so as to solve the problem that the powder and the water vapor in the air are oxidized and bonded into blocks in the prior art, and when they are directly placed on the molding table for sintering The molding surface of the single-layer powder is not smooth enough, which leads to technical problems of quality defects inside the parts, and when different metals are powdered, the amount of metal powder required is often different. If a single powder drop is used, it will cause waste of metal powder. question

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