System and method for recycling and reusing laser forming old powder

Abstract

The invention discloses a system and method for recycling and reusing laser forming old powder. According to the technical scheme, the system is characterized by comprising a powder screening machine, a transfer powder bucket, a powder mixer and a powder feeder, wherein the powder screening machine is used for screening qualified old powder out of old powder left after laser forming of the last time, the transfer powder bucket is used for collecting the screened-out qualified powder, the powder mixer is used for three-dimensionally rotating the transfer powder bucket so that the old powder and new powder can be fully mixed, and the powder feeder is used for feeding the mixed powder in the transfer powder bucket to a forming main machine to be reused. The method for recycling and reusing the laser forming old powder comprises the steps of powder screening, powder mixing and powder feeding. According to the system and method, powder waste and the harm to the health of human bodies can be basically avoided, and meanwhile the situations that the strength of formed parts becomes poor, and the surfaces of the formed parts are rough are avoided.

Description

【Technical field】 [0001] The invention belongs to the technical field of rapid prototyping 3D printing, and specifically relates to a system and method for recycling and reusing old laser forming powders. 【Background technique】 [0002] 3D printers can be realized through a variety of technologies, and the most widely used in industrialization is the laser powder sintering technology SLS. The SLS method uses an infrared laser as the energy source, and most of the modeling materials used are powder materials. During processing, the powder is first preheated to a temperature slightly lower than its melting point, and then the powder is paved under the action of the powder scraping mechanism; the laser beam is selectively sintered according to the information of the layered section under computer control, and one layer is completed. Then proceed to the next layer of sintering, remove the excess powder after all sintering, and then you can get a sintered part. [0003] The exi...

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Problems solved by technology

[0004] First, the powder is expensive and toxic. The three processes of putting the screened qualified old powder into the powder mixing container, stirring and mixing the powder, and pouring the mixed powder into the powder feeding bin of the molding machine are all three processes. It will cause dust to fly, causing waste and harmful to human health;

[0005] Second, the old and new powders cannot be fully mixed during the process of stirring and mixing powders, especially in the dead corner of the container, which will make the strength of the molded parts deteriorate and the surface will be very rough;

[0006] Third, the existing powder mixing equipment cannot be matched with the powder sifter equipment and powder feeder equipment, which increases the operation steps, resulting in inconvenient operation, more time-consuming and a large amount of dust generated, reducing production efficiency

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