3D (three-dimensional) printing powder delivery and paving linkage type bidirectional powder paving device and equipment

Abstract

The invention relates to a 3D (three-dimensional) printing powder delivery and paving linkage type bidirectional powder paving device. The 3D printing powder delivery and paving linkage type bidirectional powder paving device comprises a worktable, a powder paving driving device, and a powder paving device, wherein the powder paving device is of a powder delivery and paving linkage structure and comprises a powder bin, a powder falling closing area, a quantitative powder delivery area and a powder paving part; the powder falling closing area is arranged at the bottom part of the powder bin, and a powder falling closing shaft is arranged in the powder falling closing area; a detachment and installation structure is arranged between an end cap of the powder bin and the bottom part of the powder bin; a powder bin pressing rotary button is arranged above a roller cylinder in the quantitative powder delivery area and is used for fixing the powder bin and the roller cylinder, a quantitative powder delivery roller is arranged in the quantitative powder delivery area, a powder falling port is arranged under the quantitative powder delivery roller, and the roller cylinder is detachably connected with the bottom part of the powder bin; a powder delivery and paving separation structure is arranged between the powder delivery and paving linkage structure and the powder paving driving device; the powder paving part is arranged at both sides of the roller cylinder, and each side is provided with a scraping knife. The 3D printing powder delivery and paving linkage type bidirectional powder paving device has the advantages that the whole structure is stable, the efficiency is improved by double scraping knives, the bidirectional powder paving function is realized, the aligning process of powder delivery and powder paving in working is not needed, the powder control accuracy is high, and the powder lifting and snapping are avoided; the structure is simple, and the detachment and cleaning are convenient.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a 3D printing powder feeding and spreading linkage type bidirectional powder spreading device and equipment containing a 3D printing powder feeding and spreading linkage type bidirectional powder spreading device. Background technique [0002] 3D printing technology refers to the combination of converting the complex three-dimensional shape of the required shaped workpiece into a simple two-dimensional section through slicing. Many 3D printing technologies use powder as raw material for layer-by-layer printing, layered accumulation, and "grow" from bottom to top into three-dimensional products with arbitrary complex shapes and structures. The 3D printing process can effectively overcome the defects of complex structures and complex processes that are difficult to process in traditional processes, and it also greatly changes the product design concept. Compared wit...

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Problems solved by technology

Roller-type powder spreading method, the mechanism is relatively complicated, and the rolling of the roller will leave ripples on the surface of the powder layer, which will affect the flatness of the surface of the powder layer. Cracks occur on parts that are not high; when the mobile hopper powder spreading method is used for powder spreading, when the forming material is a powder with poor fluidity, the powder is not easy to flow out from the slit of the hopper due to the "bridging" phenomenon, which affects powder effect

[0004] At this stage, various 3D printing technologies using powder spreading devices often have the following problems: ① More powder spreading in one direction, wasteful travel, and low powder spreading efficiency

②When two-way powder spreading is adopted, for example, some adopt a double-roller structure, and each roller must be controlled by a motor, and the powder spreading structure is complex and unstable

③In the existing powder spreading and powder feeding structure, the powder feeding system is often used to fix, and the powder spreading system moves. During the powder spreading process, the powder feeding system is separated from the powder spreading system, and the powder is easy to waste, and there will be a small amount of powder blowing in the molding space , the phenomenon of elastic powder affects the working environment of the molding cavity, which in turn affects the printing quality of the molded parts. The above problems have a serious impact on the quality of the molded parts and the molding efficiency, and need to be solved urgently

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