slm 3D printer quantitative powder feeder

Abstract

The invention discloses a quantitative powder feeder for an SLM 3D printer. A powder scraper can be reciprocally slid and positioned in a forming box, including a fixedly installed vertical sand box, an outer cylinder and a rotor. The outer cylinder is fixedly installed on the vertical sand box. At the outlet of the lower end of the box, the rotor is rotatably inserted into the outer cylinder, wherein at least one open groove is formed on the outer wall of the rotor circumference, and a space for accommodating powder is formed between the open groove and the inner wall of the outer cylinder. A powder inlet and a powder outlet are formed on the outer wall of the circumference of the outer cylinder, wherein the powder inlet is connected to the outlet at the lower end of the vertical sand box, the powder outlet of the outer cylinder is just above the sliding route of the powder scraper, and the opening of the rotor The groove can be selectively connected with one of the powder inlet and powder outlet of the outer cylinder. The reciprocating movement of the powder scraper can be linked to the synchronous rotation of the rotor. The invention has a simple structure, small volume, and is convenient for quantitative powder feeding, and the powder feeding amount can be adjusted , high versatility.

Description

technical field [0001] The invention relates to a powder feeder for an SLM 3D printer, in particular to a quantitative powder feeder for an SLM 3D printer. Background technique [0002] SLM 3D printer powder feeder methods are basically divided into two categories: parallel powder box powder feeding and vertical powder box powder feeding, among which: [0003] Parallel powder box powder feeding is to install a powder feeding box parallel to the forming box, the forming box is lowered by one working unit, and the corresponding powder feeding box is raised by one working unit, and the powder above the forming plane is scraped into the forming box by the powder scraper. The excess part is sent to the overflow powder tank for recycling. The advantage is that the work is stable and the amount of powder feeding can be quantitatively controlled. The disadvantage is that a sufficient amount of powder needs to be added to the powder box at one time, which cannot be added during work,...

AI Technical Summary

Problems solved by technology

[0003] Parallel powder box powder feeding is to install a powder feeding box parallel to the forming box, the forming box is lowered by one working unit, and the corresponding powder feeding box is raised by one working unit, and the powder above the forming plane is scraped into the forming box by the powder scraper. The excess part is sent to the overflow powder tank for recycling. The advantage is that the work is stable and the amount of powder feeding can be quantitatively controlled. The disadvantage is that a sufficient amount of powder needs to be added to the powder box at one time, which cannot be added during work, and the entire forming space has a large volume. , it is not easy to maintain the protective atmosphere, and a powder feeding box is added, which increases the original cost of the whole machine

[0004] The advantage of the vertical powder box is that the forming space is small, and raw material powder can be added at any time. The disadvantage is that the powder feeding mechanism is complicated, the processing is difficult, and it is difficult to achieve quantitative powder feeding.

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