Auxiliary powder feeding device of double-laser printer

Abstract

The invention discloses an auxiliary powder feeding device of a double-laser printer, and belongs to the technical field of auxiliary powder feeding devices of double-laser printers. The auxiliary powder feeding device comprises a double-laser printer body and two L-shaped fixing plates, wherein the two L-shaped fixing plates are fixedly connected to the top of the double-laser printer body, and the front ends of the two L-shaped fixing plates are fixedly connected with a powder laying cylinder. According to the auxiliary powder feeding device, when powder is fed to the double-laser printer body each time, a driving motor is used for driving a first rotating rod to rotate, a sieve tray is driven to rotate continuously, and an extrusion mechanism and a pin block are matched to enable the sieve tray to move up and down during rotation; metal powder is further dispersed, so that the metal powder is prevented from being caked; and when a rotating disc does not rotate by a circle, a second sliding rod is extruded by a long second guide block, so that an ejector rod moves up and down to eject the metal powder at a pipe opening of a discharging pipe, the discharging pipe is prevented from being blocked by the metal powder, and the powder feeding device can smoothly and continuously convey the metal powder to the double-laser printer body.

Description

technical field [0001] The invention relates to the technical field of auxiliary powder feeding devices for dual laser printers, in particular to an auxiliary powder feeding device for dual laser printers. Background technique [0002] 3D printing technology is a technology that accumulates materials layer by layer to manufacture solid parts. Compared with traditional material removal technology, it does not require tools and molds, and does not require multi-process processing. The production cycle is short and complex structures can be easily processed. The parts, powder feeding assembly and powder spreading assembly are the key components of the metal 3D printer. The function of the powder feeding assembly is to send the metal powder to the molding cylinder in the molding chamber. [0003] The existing technology discloses some invention patents on the auxiliary powder feeding device of dual laser printers. The Chinese patent application number is CN202010581147.X, which ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an auxiliary powder feeding device for a dual laser printer to solve the problem in the prior art that when the metal powder for 3D printing is added to the powder coating cylinder, the metal powder accumulates in the powder coating cylinder. , and the outlet at the bottom of the powder spreading cylinder is small, which is prone to powder blocking, resulting in the inability of the subsequent powder to be conveyed to the print head smoothly, and the metal powder pre-stored in the existing powder spreading cylinder stays for a long time when it is not in use. In the powder spreading cylinder, the metal powder accumulates on each other, which is prone to agglomeration, which makes it more difficult for the powder to flow out from the outlet at the bottom of the powder spreading cylinder, which is not conducive to the problem of conveying the metal powder to the 3D printing head

[0009] When working, because in the prior art, when metal powder for 3D printing is added into the powder spreading cylinder, the metal powder accumulates in the powder spreading cylinder, and the outlet at the bottom of the powder spreading cylinder is small, which is prone to powder blocking, resulting in subsequent powder It cannot be smoothly conveyed to the print head, and the metal powder pre-stored in the existing powder coating cylinder stays in the powder coating cylinder for a long time when not in use, and the metal powder accumulates on each other, which is prone to agglomeration, making the powder more difficult to print. Flowing out from the outlet at the bottom of the powder coating cylinder is not conducive to conveying the metal powder to the 3D printing head. This invention provides a technical solution to solve the above problems. When the invention is used, the metal powder is first added to the powder coating from the feed port Inside the cylinder, start the driving motor to drive the first rotary rod to rotate, the first rotary rod drives the sieve plate to rotate continuously through the pin block, and sieves the metal powder falling on the top of the sieve plate, which can not only disperse the metal powder, The metal powder can also be sieved to avoid large metal powder agglomerates falling on the mouth of the feeding pipe, and when the first rotating rod rotates, it drives the rotating disc to rotate, driving the three first guide blocks and three first guide blocks fixedly connected with it. One second guide block rotates, and when the three first guide blocks rotate, they first contact with the first slide bar, squeeze the first slide bar, make the first slide bar slide down, press the sieve plate through the top plate, and make the sieve plate Slide down along the pin block and the second slide bar, when the first guide block breaks away and squeezes the first slide bar, the sieve plate slides up quickly under the action of the first gas spring, and at the same time drives the top plate and the first slide bar to reset, During the rapid reset process of the sieve tray, the metal powder agglomerates falling on the top will bounce up, and then the metal powder agglomerates will quickly fall and impact on the top of the sieve tray under the action of gravity, so that the metal powder agglomerates can be quickly dispersed, which is beneficial to the double laser The printer body is feeding powder smoothly, and the metal powder sieved by the sieve plate falls on the inner bottom surface of the powder spreading cylinder, and part of it falls directly from the nozzle of the feeding tube. When the rotating disc rotates, the second guide block finally squeezes For the first slide bar, because the second guide block is longer than the first guide block, the downward movement distance of the first slide bar becomes larger, and the downward movement distance of the top-pressed sieve tray also becomes larger. At this time, the sieve tray squeezes the first The second sliding rod moves the second sliding rod downward for a certain distance, and the second sliding rod drives the first sliding plate to slide down along the first chute, drives the ejector rod to move downward, compresses the second gas spring, and acts as the second guide block When detached from the first slide bar, the second gas spring squeezes the first slide plate to reset the ejector bar and the second slide bar, so that the ejector bar can be acted on once when the rotating disk does not rotate for one circle, causing the ejector bar to vibrate up and down , the ejector rod is located at the mouth of the feeding pipe, driving the metal powder at the mouth of the pipe to move, avoiding the accumulation of metal powder to block the mouth of the feeding pipe, so that the metal powder can flow into the feeding pipe smoothly, so as to achieve When the dual laser printer body is feeding powder, the drive motor is used to drive the first rotating rod to rotate, which drives the sieve plate to rotate continuously, and cooperates with the extrusion mechanism and the pin block to make the sieve plate move up and down during rotation, and the metal powder is first further processed. Scatter to avoid agglomeration of metal powder, and when the rotating disc does not rotate for one circle, use the longer second guide block to squeeze the second slide rod, so that the ejector rod moves up and down, and pushes the metal powder at the nozzle of the feeding tube to avoid The metal powder blocks the feeding tube, which is conducive to the smooth and continuous delivery of metal powder to the dual laser body by the powder feeding device

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