Powder supply device for metal printer

Abstract

The utility model relates to the technical field of metal printing, in particular to a powder supply device for a metal printer, which comprises a printing table, a powder storage device and a screening net, the powder storage device is arranged on the right side of the printing table, the screening net is arranged in a recovery frame and located below the left side of the printing table, and a cam mechanism is arranged below a check ring arranged above the screening net. A dust collector is further arranged above the screening net, arranged on the lifting beam and capable of ascending and descending under the action of the lifting table. The automatic screening device has the advantages that the automatic screening mechanism is arranged, metal powder can be separated from impurities, and the filtered metal powder is sent back into the powder storage device of the printer to be reused; an automatic cleaning device is arranged, the printing table can be automatically cleaned, impurities on the screening net can be removed through a lifting type dust collector, and the cleaning efficiency is high; and thirdly, the mechanism is simple, and the automation degree is high.

Description

Technical Field

[0001] The utility model relates to the technical field of metal printing, in particular to a powder feeder for a metal printer. Background Art

[0002] Metal 3D printing is a 3D printing technology that uses metal powder to directly print metal parts. During printing, a scraper is first used to spread a layer of metal powder on the forming cylinder base. Then, a laser beam is used to selectively melt the powder according to the cross-sectional contours of each layer of the part to process the current layer. After one layer is sintered, the lifting system descends to the height of one cross-sectional layer, and the powder roller spreads another layer of metal powder on the formed cross-sectional layer, and the next layer is sintered. This layer-by-layer processing is repeated until the entire part is sintered.

[0003] After the parts are sintered, the metal powder around the parts needs to be swept away manually with a brush, so that the excess metal powder is transported to the collection bucket through the discharge pipe, and then the formed parts can be taken out. When the collection bucket is full of metal powder, the collection bucket needs to be taken out manually. Since the metal powder near the parts will be affected by the laser beam, the metal powder is easily heated and agglomerated. Therefore, the metal powder needs to be poured into a screening machine manually for screening to screen out the agglomerated metal powder and impurities. The screened metal powder can then be reused. At present, people use screening machines and powder extractors to screen and supply metal powder respectively. The process is long, which affects work efficiency. Moreover, after the screening machine has been used for a period of time, the internal screen is easily clogged, and the screening machine needs to be stopped and then manually cleaned or replaced. This will also lead to lower overall work efficiency. Summary of the Invention

[0004] The purpose of the present utility model is to provide a powder feeder for a metal printer to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a powder feeder for a metal printer, comprising a printing table 12, a powder storage device 14 and a screening net 5, the powder storage device 14 is on the right side of the printing table 12, and the screening net 5 is arranged in a recovery frame 16 and is located at the lower left side of the printing table 12, characterized in that: a retaining ring 9 is provided above the screening net 5, and guide rods 19 are provided at the bottom of the four corners, which cooperate with the guide sleeves 17 on the inner wall support blocks 18 of the recovery frame 16, and a cam mechanism is provided below the top left side of the screening net 5 to enable it to rise and fall quickly, comprising a motor 3 and a cam 4, the motor 3 is arranged on the bracket 2 on the left side of the recovery frame 16, and the cam 4 is arranged at the front end of the motor 3; a vacuum cleaner 10 is provided above the screening net 5, the vacuum cleaner 10 is arranged on the lifting beam 8, and can be raised and lowered under the action of the lifting platform 7.

[0006] Preferably, a strong tension spring is provided in the guide sleeve 17 , and both ends of the tension spring are connected to the bottom of the guide rod 19 and the support block 18 respectively.

[0007] Preferably, a scraper 13 is provided on the printing table 12 , and the scraper 13 is connected to the cylinders 15 on both sides of the printing table 12 .

[0008] Preferably, the scraper 13 is covered with a rubber pad underneath and is in contact with the surface of the printing table 12 .

[0009] Preferably, a slanted plate 11 is provided at the front end of the left side of the printing platform 12 , and the top end of the slanted plate 11 is 10-20 mm to the left of the right retaining ring 9 .

[0010] Preferably, telescopic pipes are provided in the lifting beam 8 and the lifting platform 7 and are connected to the impurity collector 1 below the lifting platform 7 .

[0011] Preferably, a recovery pipe 20 is provided at the rear end of the bottom of the recovery frame 16 and is connected to the powder storage container 14, and the power is provided by the negative pressure machine on the outside.

[0012] Compared with the prior art, the beneficial effects of the present invention are: first, it is provided with an automatic screening mechanism, which can separate metal powder from impurities, and return the filtered metal powder to the printer powder storage container for reuse; second, it is provided with an automatic cleaning device, the printing table can be automatically cleaned, and impurities on the screening net can be removed by a lifting vacuum cleaner, with high cleaning efficiency; third, the structure is simple and the degree of automation is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 for Figure 1 Top view of .

[0015] In the figure: 1. Impurity collector; 2. Bracket; 3. Motor; 4. Cam; 5. Screening net; 6. Avoidance groove; 7. Lifting platform; 8. Lifting beam; 9. Retaining ring; 10. Vacuum cleaner; 11. Inclined plate; 12. Printing table; 13. Scraper; 14. Powder storage; 15. Cylinder; 16. Recovery frame; 17. Guide sleeve; 18. Support block; 19. Guide rod; 20. Recovery pipeline. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-2 The utility model provides a technical solution: a powder feeder for a metal printer, comprising a printing table 12, a powder storage device 14 and a screening net 5, the powder storage device 14 is on the right side of the printing table 12, and the screening net 5 is arranged in a recovery frame 16 and is located at the lower left side of the printing table 12.

[0018] A retaining ring 9 is provided above the screening mesh 5, and guide rods 19 are provided at the bottom of the four corners, which cooperate with the guide sleeve 17 on the support block 18 on the inner wall of the recovery frame 16, and a cam mechanism is provided below the top left side of the screening mesh 5 to enable it to rise and fall quickly, including a motor 3 and a cam 4. The motor 3 is provided on the bracket 2 on the left side of the recovery frame 16, and the cam 4 is provided at the front end of the motor 3. A strong tension spring is provided in the guide sleeve 17, and the two ends of the tension spring are respectively connected to the bottom of the guide rod 19 and the support block 18. Under the action of the cam 4 and the tension spring, the screening mesh 5 can be driven to vibrate up and down quickly to filter metal powder and separate impurities.

[0019] A vacuum cleaner 10 is provided above the screening net 5. The vacuum cleaner 10 is provided on the lifting beam 8 and can be raised and lowered under the action of the lifting platform 7. A telescopic pipe is provided in the lifting beam 8 and the lifting platform 7 and is connected to the impurity collector 1 below the lifting platform 7, so as to ensure that the impurities separated from the screening net 5 can be cleaned in time.

[0020] A scraper 13 is provided on the printing table 12, and the scraper 13 is connected to the cylinder 15 on both sides of the printing table 12. A rubber pad is covered under the scraper 13 and fits the surface of the printing table 12. A ramp 11 is provided at the front end of the left side of the printing table 12, and the top of the ramp 11 is 10-20 mm to the left of the right retaining ring 9, so that the powder and impurities on the printing table 12 can be sent into the retaining ring 9 at the same time.

[0021] At the same time, a recovery pipe 20 is provided at the rear end of the bottom of the recovery frame 16 and is connected to the powder storage container 14. The power is provided by the negative pressure machine on the outside to promptly return the filtered metal powder to the powder storage container 14 for reuse.

[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder feeder for a metal printer, comprising a printing platform (12), a powder storage device (14) and a screening net (5), wherein the powder storage device (14) is located on the right side of the printing platform (12), and the screening net (5) is arranged in a recovery frame (16) and located below the left side of the printing platform (12), characterized in that: A retaining ring (9) is provided above the screening net (5), and guide rods (19) are provided at the bottom of the four corners, which cooperate with the guide sleeves (17) on the inner wall support blocks (18) of the recovery frame (16). A cam mechanism for quickly lifting and lowering the screening net (5) is provided below the top of the left side of the screening net (5), comprising a motor (3) and a cam (4). The motor (3) is provided on the bracket (2) on the left side of the recovery frame (16), and the cam (4) is provided at the front end of the motor (3). A dust collector (10) is provided above the screening net (5), and the dust collector (10) is provided on the lifting beam (8) and can be raised and lowered under the action of the lifting platform (7).

2. A powder feeder for a metal printer according to claim 1, characterized in that: A strong tension spring is provided in the guide sleeve (17), and the two ends of the tension spring are respectively connected to the bottom of the guide rod (19) and the support block (18).

3. The powder feeder for a metal printer according to claim 1, characterized in that: The printing platform (12) is provided with a scraper (13), and the scraper (13) is connected to the cylinders (15) on both sides of the printing platform (12).

4. The powder feeder for a metal printer according to claim 3, characterized in that: The scraper (13) is covered with a rubber pad below and is in contact with the surface of the printing table (12).

5. The powder feeder for a metal printer according to claim 1, characterized in that: The front end of the left side of the printing platform (12) is provided with an inclined plate (11), and the top end of the inclined plate (11) is 10-20 mm to the left of the right retaining ring (9).

6. The powder feeder for a metal printer according to claim 1, characterized in that: The lifting beam (8) and the lifting platform (7) are provided with telescopic pipes, which are connected to the impurity collector (1) below the lifting platform (7).

7. The powder feeder for a metal printer according to claim 1, characterized in that: The bottom rear end of the recovery frame (16) is provided with a recovery pipeline (20) and is connected to the powder storage device (14), and the power is provided by the negative pressure machine on the outside.

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