Moistureproof 3D printing powder screening device

Abstract

The utility model discloses a damp-proof 3D printing powder screening device which comprises a vibrating screen body, an upper-layer screen and a discharging pipe, the upper-layer screen is installed above a base-layer screen of the vibrating screen body, the discharging pipe is fixed to a discharging opening of the upper-layer screen in a communicated mode, and the damp-proof 3D printing powder screening device further comprises a drying screen mechanism. The drying screen mechanism comprises an inner heat ring pipe, a straight inserting pipe, an L-shaped inserting pipe, an outer connecting pipe, a disc connecting box, an outer heat ring pipe, an extension pipe and a heat tracing belt, the inner heat ring pipe is clamped into the upper-layer screen, and a supporting plate used for supporting and connecting the inner heat ring pipe is welded to the inner screen wall of the upper-layer screen. Under the combined action of an inner heat ring pipe, an outer heat ring pipe and a heat tracing band 15 of the drying sieve mechanism, the 3D printing powder in the upper-layer sieve can be subjected to heat drying in a heat environment, it can be ensured that the 3D printing powder is kept in a dry state in the screening process, and damp-proof screening during screening of the 3D printing powder is effectively achieved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a moisture-proof 3D printing powder sieving device. Background Technology

[0002] Metal powder 3D printing is a process in which metal powder materials are deposited layer by layer, melted and solidified under the action of laser or electron beam, and finally formed into a three-dimensional solid structure. Metal powder is the raw material used for 3D printing, and the particle size distribution is usually in the range of 15-53μm. At present, the particle size of powder obtained by various atomization methods is in the range of 0-300μm. Therefore, in order to obtain metal powder that meets the requirements for 3D printing, it is necessary to sieve the powder with a wide atomization particle size range.

[0003] Currently, when metal powders used for 3D printing are sieved in an ultrasonic vibrating screen, if the ultrasonic vibrating screen encounters a damp indoor environment or a humid environment near a mountain, the metal powders easily absorb moisture when entering the ultrasonic vibrating screen for sieving. This causes the sieved metal powders to agglomerate and become less fluid, thus affecting the stability of the 3D printing process and the quality of the printed products. To address this, we propose a moisture-proof 3D printing powder sieving device. Utility Model Content

[0004] The main objective of this invention is to provide a moisture-proof 3D printing powder sieving device. By setting a drying mechanism on the vibrating screen body used for 3D printing powder sieving, the 3D printing powder in the upper screen can be thermally dried in a hot environment under the combined action of the inner heating coil, outer heating coil, and heating tape 15 of the drying mechanism. This ensures that the 3D printing powder remains dry during the sieving process, effectively achieving moisture-proof sieving of 3D printing powder and solving the problems in the background technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A moisture-proof 3D printing powder sieving device includes a vibrating screen body, an upper screen, and a discharge pipe. The upper screen is installed above the base screen of the vibrating screen body, and the discharge pipe is fixedly connected to the discharge port of the upper screen. The device also includes a drying mechanism, which comprises an inner heating coil, a straight insertion tube, an L-shaped insertion tube, an external connecting tube, a tray connecting box, an external heating coil, an extension tube, and a heating tape. The inner heating coil is inserted into the upper screen, and a support for the inner heating coil is welded to the inner screen wall of the upper screen. The inner heating coil tube has a support plate. The two ends of the inner heating coil tube are welded together with a straight insertion tube and an L-shaped insertion tube, respectively. The straight insertion tube and the L-shaped insertion tube pass through the screen shell of the upper screen. The outer end of the L-shaped insertion tube is connected to the disc connecting box through an external connecting pipe. An external heating coil tube is connected to the outside of the disc connecting box and is sleeved on the extension tube. The extension tube is welded to the outside of the discharge pipe's drop pipe. A heat tracing cable is inserted between the straight insertion tube, the inner heating coil tube, the L-shaped insertion tube, the external connecting pipe, the disc connecting box, and the external heating coil tube.

[0007] Furthermore, the tray has an L-shaped body, and an inner heating coil tube is inserted between the L-shaped body of the tray and the upper screen.

[0008] By adopting the above technical solution, the L-shaped plate of the tray, in conjunction with the upper screen, can better hold the coiled tube of the inner heating coil.

[0009] Furthermore, the upper screen has openings in its screen shell for the straight tube and the L-shaped tube to pass through, and the tube bodies of the straight tube and the L-shaped tube are bonded to the openings of the upper screen.

[0010] By adopting the above technical solution, the upper screen shell has openings that allow for the insertion of straight and L-shaped tubes for bonding and fixing.

[0011] Furthermore, a ring is fixed at the outer opening of the L-shaped insert tube extending from the upper screen, and the ring is inserted into the opening of the outer connecting tube and glued in place.

[0012] By adopting the above technical solution, the L-shaped cannula is inserted into the outer connecting tube with a plug ring to achieve internal support and adhesion.

[0013] Furthermore, the external connecting pipe is interconnected and welded to the port of the external heating coil pipe via a connecting box;

[0014] By adopting the above technical solution, the external connecting pipe can be connected to the external heating coil pipe through the connecting box.

[0015] Furthermore, the inner diameter of the outer heating coil tube is larger than the diameter of the extension tube, and a support ring for supporting the outer heating coil tube is bolted to the outside of the extension tube.

[0016] By adopting the above technical solution, the outer heating coil tube can be supported by a support ring after being sleeved outside the extension tube, preventing the outer heating coil tube from sliding down.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model, by setting a drying mechanism on the vibrating screen body used for 3D printing powder sieving, allows the 3D printing powder in the upper screen to be thermally dried in a hot environment under the combined action of the inner heating coil, outer heating coil, and heating tape 15 of the drying mechanism. This ensures that the 3D printing powder remains dry during the sieving process and effectively achieves moisture-proof sieving of 3D printing powder.

[0019] Furthermore, the discharge pipe of the drying and sieving mechanism extends the discharge distance at the discharge pipe of the upper sieve, and together with the external heating coil, it can heat and dry the powder after the 3D printing powder is sieved and discharged, ensuring the dryness of the 3D printing powder after drying. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a moisture-proof 3D printing powder sieving device according to the present invention.

[0021] Figure 2 This is an exploded view of the drying and sieving mechanism of a moisture-proof 3D printing powder sieving device according to this utility model.

[0022] In the diagram: 1. Vibrating screen body; 2. Upper screen; 3. Discharge pipe; 4. Drying screen mechanism; 5. Inner heating coil; 6. Support plate; 7. Straight insertion pipe; 8. L-shaped insertion pipe; 9. Insertion ring; 10. External connecting pipe; 11. Disc connecting box; 12. External heating coil; 13. Extension pipe; 14. Support ring; 15. Heating tape. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1-2As shown, a moisture-proof 3D printing powder sieving device includes a vibrating screen body 1, an upper screen 2, and a discharge pipe 3. The upper screen 2 is installed above the base screen of the vibrating screen body 1, and the discharge pipe 3 is fixedly connected to the discharge port of the upper screen 2. It also includes a drying screen mechanism 4, which includes an inner heating coil 5, a straight insertion pipe 7, an L-shaped insertion pipe 8, an external connecting pipe 10, a tray connecting box 11, an outer heating coil 12, an extension pipe 13, and a heating tape 15. The inner heating coil 5 is inserted into the upper screen 2, and a support for the inner heating coil 5 is welded to the inner screen wall of the upper screen 2. The tray 6 has a straight insertion pipe 7 and an L-shaped insertion pipe 8 welded to each end of the inner heating coil pipe 5. The straight insertion pipe 7 and the L-shaped insertion pipe 8 pass through the screen shell of the upper screen 2. The outer end of the L-shaped insertion pipe 8 is connected to the disc connecting box 11 through the outer connecting pipe 10. The outer heating coil pipe 12, which is sleeved on the extension pipe 13, is connected to the outside of the disc connecting box 11. The extension pipe 13 is welded to the outside of the drop pipe of the discharge pipe 3. A heating tape 15 is inserted between the straight insertion pipe 7, the inner heating coil pipe 5, the L-shaped insertion pipe 8, the outer connecting pipe 10, the disc connecting box 11, and the outer heating coil pipe 12.

[0025] The tray 6 is an L-shaped plate, and an inner heating coil tube 5 is inserted between the L-shaped plate of the tray 6 and the upper screen 2.

[0026] By adopting the above technical solution, the L-shaped plate of the tray 6, together with the upper screen 2, can better hold the coiled tube of the inner heating coil 5.

[0027] The upper sieve 2 has an opening in its sieve shell for the straight insertion tube 7 and the L-shaped insertion tube 8 to pass through, and the tube bodies of the straight insertion tube 7 and the L-shaped insertion tube 8 are bonded to the opening of the upper sieve 2.

[0028] By adopting the above technical solution, the upper screen 2 has openings in the screen shell to allow the insertion of straight tubes 7 and L-shaped tubes 8 for bonding and fixing.

[0029] Among them, the L-shaped insert tube 8 is fixed with an insert ring 9 at the outer tube opening of the upper screen 2, and the insert ring 9 is stuck into the tube opening of the outer connecting tube 10 and glued and fixed.

[0030] By adopting the above technical solution, the L-shaped insertion tube 8 is inserted into the outer connecting tube 10 with the insertion ring 9 to achieve internal support and adhesion.

[0031] The external connecting pipe 10 is interconnected and welded to the port of the external heating coil pipe 12 via a disc connecting box 11.

[0032] By adopting the above technical solution, the external connecting pipe 10 can be connected to the external heating coil pipe 12 through the connecting box 11.

[0033] The inner diameter of the outer heating coil tube 12 is larger than the diameter of the extension tube 13, and the outer side of the extension tube 13 is bolted with a support ring 14 for supporting the outer heating coil tube 12.

[0034] By adopting the above technical solution, the outer heating coil tube 12 can be supported by the support ring 14 after being sleeved outside the extension tube 13, thus preventing the outer heating coil tube 12 from sliding down.

[0035] It should be noted that this utility model is a moisture-proof 3D printing powder sieving device. After setting a drying mechanism 4 on the existing vibrating screen body 1 used for 3D printing powder sieving, the inner heating coil 5 of the drying mechanism 4 is supported between the support plate 6 and the upper screen 2 of the vibrating screen body 1. The straight insertion tube 7 and the L-shaped insertion tube 8 of the inner heating coil 5 extend out of the upper screen 2. Then, the L-shaped insertion tube 8 is connected to the outer heating coil 12 through the outer connecting pipe 10 and the disc connecting box 11. The extension tube 13 sleeved on the outer heating coil 12 can be connected to the tube body of the discharge pipe 3. Then, the straight insertion tube 7, the inner heating coil 5, the L-shaped insertion tube 8, the outer connecting pipe 10, and the disc connecting box 11 are connected. A heating cable 15 is threaded between the heating tube 1 and the outer heating coil tube 12. The heating cable 15 extends out of the straight insertion tube 7 and the outer heating coil tube 12 and can be connected to an external temperature control device for power control. Before the 3D printing powder is poured into the upper sieve 2 for sieving, the heating cable 15 can be turned on in advance. The heating cable 15 can heat and dry the upper sieve 2 and the extension tube 13. At this time, when the existing vibrating screen cover is placed on the upper sieve 2 for sieving and feeding, the 3D printing powder in the upper sieve 2 can be thermally dried in a hot environment, and the powder discharged from the discharge pipe 3 can also be dried and discharged, effectively achieving moisture-proof sieving of 3D printing powder.

[0036] It should be noted that this utility model is a moisture-proof 3D printing powder sieving device. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A damp-proof 3D printing powder screening device, comprising a vibrating screen body (1), an upper layer screen (2) and a discharge pipe (3), the upper layer screen (2) is installed above the base layer screen of the vibrating screen body (1), and the discharge pipe (3) is fixed at the discharge port of the upper layer screen (2) in intercommunication, characterized in that: The upper layer sieve (2) is provided with an inner heat circle pipe (5), a straight insertion pipe (7), an L-shaped insertion pipe (8), an outer connecting pipe (10), a disc connecting box (11), an outer heat circle pipe (12), an extension pipe (13) and a heat tracing belt (15). The inner heat circle pipe (5) is clamped in the upper layer sieve (2), and a supporting plate (6) for supporting the inner heat circle pipe (5) is welded on the inner sieve wall of the upper layer sieve (2). The straight insertion pipe (7) and the L-shaped insertion pipe (8) are respectively welded on the two ends of the inner heat circle pipe (5), and the straight insertion pipe (7) and the L-shaped insertion pipe (8) pass through the sieve shell of the upper layer sieve (2). The outer pipe opening of the L-shaped insertion pipe (8) is connected with the disc connecting box (11) through the outer connecting pipe (10), and the outer heat circle pipe (12) is sleeved on the extension pipe (13) outside the box body of the disc connecting box (11). The extension pipe (13) is welded on the falling pipe opening of the discharge pipe (3). The heat tracing belt (15) is inserted between the straight insertion pipe (7), the inner heat circle pipe (5), the L-shaped insertion pipe (8), the outer connecting pipe (10), the disc connecting box (11) and the outer heat circle pipe (12).

2. The moisture-proof 3D printing powder screening device according to claim 1, characterized in that: The plate body of the supporting plate (6) is an L-shaped plate body, and the L-shaped plate body of the supporting plate (6) is clamped with the pipe body of the inner heat circle pipe (5) between the supporting plate (6) and the upper layer sieve (2).

3. The moisture-proof 3D printing powder screening device according to claim 1, wherein: The sieve shell of the upper layer sieve (2) is provided with an opening for passing through the straight insertion pipe (7) and the L-shaped insertion pipe (8), and the pipe body of the straight insertion pipe (7) and the L-shaped insertion pipe (8) is connected with the opening of the upper layer sieve (2).

4. The moisture-proof 3D printing powder screening device according to claim 3, characterized in that: The outer pipe opening of the L-shaped insertion pipe (8) is fixed with an insertion ring (9), and the insertion ring (9) is clamped in the pipe opening of the outer connecting pipe (10).

5. A moisture resistant 3D printing powder sieving apparatus according to claim 4, wherein: The outer connecting pipe (10) is welded with the pipe opening of the outer heat circle pipe (12) through the disc connecting box (11).

6. A moisture resistant 3D printing powder sieving apparatus according to claim 5, wherein: The circle body of the outer heat circle pipe (12) is larger than the pipe body diameter of the extension pipe (13), and the extension pipe (13) is provided with a supporting ring (14) for supporting the outer heat circle pipe (12) outside through a bolt.

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