Powder spreading device for 3D printing equipment and 3D printing equipment

Abstract

The invention provides a powder spreading device for 3D printing equipment and the 3D printing equipment. A powder spreading box is driven by a driving assembly, a repeated vibration assembly is arranged in the powder spreading box, the interior of the powder spreading box is divided into a first mounting cavity and a second mounting cavity by the repeated vibration assembly, a power-off assembly and a powder pushing assembly are arranged in the first mounting cavity, a power-off assembly and a powder conveying assembly are arranged in the second mounting cavity, a powder blocking assembly is arranged in the portion, close to the second mounting cavity, of the side plate of the powder spreading box, the vibration assembly comprises conductive plates arranged at intervals, a conductive block is movably connected between the two conductive plates, and a powerful magnet is fixedly arranged between the two conductive plates. In the using process, the internal repeated vibration assembly generates pressure on a bottom plate of the powder spreading box, so that spreaded powder is more compact, meanwhile, through cooperation with the power-off assembly, a dust filtering assembly, the powder conveying assembly and the powder pushing assembly, overflowing powder and flying powder in a box body are recycled, and preheating and heat preservation are conducted.

Description

technical field [0001] The invention relates to the technical field of 3D printing powder spreading, in particular to a powder spreading device for 3D printing equipment and 3D printing equipment. Background technique [0002] 3D printing is a kind of rapid prototyping technology, also known as additive manufacturing. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. , because the molding technology of the mold is carried out by layer-by-layer powder spreading and sintering, so in the whole printing manufacturing process, the powder spreading component plays an important role in the whole molding process, which can be directly related to the final mold forming effect and efficiency. [0003] The application number is "CN202011020239.7". The powder spreading equipment includes a main structure, a powder spreading roller and a roller driving part, wherein the main str...

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Problems solved by technology

[0006] 2. During the whole process of 3D printing, because each layer is sintered, the sintering area will go down by one layer, and the powder supply area will rise by one layer. Through the movement of the powder laying block, the powder lifted from the powder supply area will be spread on the The surface of the sintering area, but every time the powder is spread, the excess powder will be sent to the recovery tank, and the powder in the recovery tank will be recycled after the mold is formed. This treatment method is not only in the process of operation It will pollute the powder in the recovery cylinder, and also reduce the utilization rate of the powder;

[0007] 3. In the process of printing and forming, because the powder in the sintering area is sintered by laser, dust will be generated during the sintering process, although the existing technology will continuously fill the working cavity during the entire forming process Nitrogen or other inert gases, but if the dust concentration in the working chamber is too large, it will still affect the working environment, and at the same time, the excessive dust concentration will also affect the sintering efficiency of the laser

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