Continuous 3D printing powder supply system

Abstract

The invention discloses a continuous 3D printing powder supply system which comprises a powder storage tank, a temporary powder storage pipeline, a discharging bent pipe and a powder spreading mechanism, wherein a powder outlet mechanism is arranged at the bottom of the powder storage tank; the upper end of the temporary powder storage pipeline is provided with a first butterfly valve and connected with a powder outlet mechanism of the powder storage tank, and the lower end of the temporary powder storage pipeline is provided with a second butterfly valve; the discharging bent pipe is in a circular arc shape, and a feeding port of the discharging bent pipe is connected with a discharging port of the temporary powder storage pipeline; the powder spreading mechanism is mounted on the moving guide rail and can move from one end of the moving guide rail to the other end of the moving guide rail; and when the powder spreading mechanism is located at one end of the moving guide rail, a feeding port of the powder spreading mechanism is communicated with a discharging port of the discharging bent pipe. The temporary powder storage pipeline is adopted as a transfer mechanism for transferring metal powder from the powder storage tank to the powder spreading mechanism, a small amount of powder is fed multiple times, powder jamming is effectively avoided, the powder can be quantitatively conveyed into printing equipment, and efficient operation of powder spreading printing work is guaranteed.

Description

[0001] The present application relates to the technical field of 3D printing devices, in particular to a continuous 3D printing powder supply system. Background technique [0002] Selective Laser Melting (SLM) is the most mainstream process method in the metal 3D printing industry today. It has the advantages of high material utilization rate, wide range of applicable materials, and the ability to manufacture parts with complex shapes. It is a rapid development prospect. molding technology. Its main working principle is to import the 3D modeling sliced ​​files into the 3D printing equipment, use a scraper to flatten the metal powder less than 60 μm based on the powder feeding and spreading method, and use the computer to control the high-energy laser to scan the contour layer by layer to form the workpiece. [0003] Metal 3D printing raw materials are generally spherical powders of 15-53 μm. There are two main problems in the current feeding system: (1) During the powder feedi...

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Problems solved by technology

[0003] Metal 3D printing raw materials are generally spherical powders of 15-53 μm. There are two main problems in the current feeding system: (1) During the powder feeding process, the powder is easily agglomerated by force, and the phenomenon of jamming makes it impossible to continue feeding, which eventually leads to The printing work stops, which seriously restricts the process reliability of the printing process; (2) The amount of powder feeding cannot be precisely controlled, and the difference in the amount of material received will affect the powder spreading effect and the comprehensive powder feeding time

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