Powder recovery equipment for metal 3D printing

Abstract

The utility model provides powder recovery equipment for metal 3D printing, which comprises a recovery box provided with a feed inlet for metal powder to enter the recovery box, and a partition plate for dividing the internal space of the recovery box into two recovery cavities, the recycling box is provided with two discharging ports corresponding to the two recycling cavities and an air outlet channel used for air outlet. And the fan is arranged on the air outlet channel and used for leading airflow into the air outlet channel from the feeding port and enabling the metal powder entering the recycling box to enter different recycling cavities. Metal powder enters different recovery cavities according to different particle masses through airflow, the problem that a traditional screening plate is blocked due to the fact that large-particle powder is gradually increased is solved, therefore, powder can be classified and recovered more efficiently, and the overall powder recovery efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing recycling technology, and in particular to a powder recycling device for metal 3D printing. Background Technology

[0002] Metal 3D printing is a forming process in which powder is laid on a fixed-size forming platform, and a laser or electron beam is used as a heat source. The laser scans along the trajectory through a galvanometer to melt / sinter the powder, and the electron beam scans along the trajectory through a deflection coil to melt or sinter the powder. Then, the powder bed is lowered by one layer and a new layer of powder is laid. The above process is repeated to build up the material layer by layer.

[0003] To recover powder, Chinese patent "CN222288805U" discloses a "Powder Recovery and Processing Device for a 3D Printer." This device sieves the powder through a first sieve plate, then through a second sieve plate, and finally into a collection net. A sieving motor drives the first and second sieve plates to move and sieve. This structure facilitates the collection of powders of different sizes, achieving the function of classified collection. Although the above device can collect powders of different particle sizes, the upper sieve plate is easily clogged by the increasing number of large powder particles, thus reducing the throughput of the upper sieve plate and indirectly reducing the efficiency of powder recovery. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a powder recycling device for metal 3D printing, which solves the problem that the screening plate for screening powder is easily blocked, thus reducing the recycling efficiency.

[0005] According to embodiments of this utility model, the following technical solution is adopted:

[0006] A powder recycling device for metal 3D printing, comprising:

[0007] The recycling bin has an inlet for metal powder to enter the recycling bin. The recycling bin also has a partition to divide the internal space of the recycling bin into two recycling chambers. The recycling bin has two outlets corresponding to the two recycling chambers and an air outlet channel for air discharge.

[0008] The fan, located in the air outlet channel, is used to introduce airflow from the feed inlet into the air outlet channel and to direct the metal powder entering the recycling bin into different recycling chambers.

[0009] Preferably, it also includes a filter element, which is slidably disposed in the air outlet channel, and the fan is provided with a drive component, which is connected to the filter element and is used to make the filter element reciprocate along the height or width direction of the air outlet channel.

[0010] Preferably, the driving component includes a driving disc coaxially arranged with the fan and a movable frame slidably disposed in the air outlet channel. The filter element is disposed in the movable frame, the movable frame is provided with a connecting strip, the connecting strip has a driving groove, the driving disc is provided with a driving pin, and the driving pin passes through the driving groove.

[0011] Preferably, the air outlet duct is provided with two limiting strips on the inner side, and the movable frame is slidably engaged between the two limiting strips.

[0012] Preferably, the end of the air outlet channel away from the fan is provided with a discharge chute, which extends to the outside of the recycling bin.

[0013] Preferably, a baffle is provided on the side of the discharge trough away from the filter element.

[0014] Preferably, a protective net is provided at the end of the air outlet duct near the fan.

[0015] Preferably, the discharge port is provided with a receiving port, which is conical, and the larger end of the cone is connected to the discharge port.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this solution, when unprinted powder enters the recycling bin through the feed inlet, the fan can guide the airflow through the feed inlet into the air outlet channel. The airflow allows the metal powder to enter different recycling chambers according to their particle size, avoiding the clogging problem caused by the increasing number of large powder particles in traditional sieve plates. Therefore, powder can be classified and recycled more efficiently, improving the overall powder recycling efficiency. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural diagram of the recycling equipment in an embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the transmission structure between the drive component and the filter element in an embodiment of this utility model.

[0020] In the above attached figures: 1. Recycling bin; 101. Partition plate; 102. Recycling chamber; 103. Discharge port; 104. Limiting strip; 105. Discharge trough; 106. Feed inlet; 2. Receiving port; 3. Fan; 4. Filter element; 5. Air outlet channel; 501. Protective net; 6. Stop block; 7. Drive plate; 701. Movable frame; 702. Connecting strip; 703. Drive groove; 704. Drive pin. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1As shown in the figure, this utility model embodiment proposes a powder recycling device for metal 3D printing, comprising:

[0023] The recycling box 1 has an inlet 106 for metal powder to enter the recycling box 1. The recycling box 1 also has a partition 101 to divide the internal space of the recycling box 1 into two recycling chambers 102. The recycling box 1 has two outlets 103 corresponding to the two recycling chambers 102 respectively and an air outlet channel 5 for air outlet.

[0024] Fan 3, located in air outlet channel 5, is used to introduce airflow from inlet 106 into air outlet channel 5 and to cause the metal powder entering the recycling box 1 to enter different recycling chambers 102.

[0025] In this embodiment of the invention, during use, the feed inlet 106 of the recycling bin 1 can be connected to the recycling port of the metal 3D printer, allowing unused powder from the metal 3D printer to directly enter the recycling bin 1 through the forming platform. The partition 101 is located in the middle of the recycling bin 1, and one of the recycling chambers 102 corresponds to the feed inlet 106. When the fan is not working, if powder passes through the feed inlet 106, the powder will be discharged directly through the discharge outlet 103 of this recycling chamber 102 due to gravity. Therefore, when recycling powder, the fan 3 is started simultaneously, so that the fan 3... A negative pressure is created inside the recycling bin 1, and air is introduced into the outlet channel 5 through the inlet 106. Powder of different weights enters the recycling bin 1; heavier powder (powder clumps) is not affected by the airflow and falls vertically into the corresponding recycling chamber 102, while lighter powder is influenced by the airflow and tends to move towards the outlet channel 5, entering another recycling chamber 102. This completes the powder classification, avoiding the clogging problem caused by the increasing number of large powder particles in traditional screening plates. Therefore, powder classification and recycling can be performed more efficiently, improving the overall powder recycling efficiency. The fan 3 is preferably a direct-drive motor.

[0026] Specifically, it also includes a filter element 4, which is slidably disposed in the air outlet channel 5. The fan 3 is equipped with a drive component connected to the filter element 4, which is used to make the filter element 4 reciprocate along the height or width direction of the air outlet channel 5. Under the action of the filter element 4, a small portion of very small powder particles can be captured, which not only prevents powder from being discharged outside the collection box 1 and causing pollution to the surrounding environment, but also prevents the fan 3 from being affected by the powder. At the same time, under the action of the drive component, the filter element 4 can be driven to reciprocate in the air outlet channel 5, effectively shaking off the dust and particulate matter attached to its surface, reducing the possibility of clogging and extending the service life of the filter element 4. The drive component can be a vibration motor.

[0027] For energy conservation and equipment usage, such as Figure 2As shown, the driving component includes a driving disc 7 coaxially arranged with the fan 3 and a movable frame 701 slidably disposed in the air outlet channel 5. The filter element 4 is disposed in the movable frame 701. The movable frame 701 is provided with a connecting strip 702, and the connecting strip 702 has a driving groove 703. The driving disc 7 is provided with a driving pin 704, which passes through the driving groove 703. When the fan 3 rotates, it can drive the driving disc 7 connected to it to rotate, thereby causing the driving pin 704 connected to the driving disc 7 to make a circular motion around the fan 3 as the axis, and thus causing the driving pin 704 to move in the driving groove 703. Since the connecting strip 702 is limited by the upper and lower limits of the movable frame 701, the connecting strip 702 drives the movable frame 701 to make up-and-down reciprocating motion around the diameter of the driving disc 7, thereby realizing the reciprocating motion of the filter element 4.

[0028] Specifically, the air outlet duct 5 has two limiting strips 104 on its inner side. The movable frame 701 is slidably engaged between the two limiting strips 104. Under the action of the limiting strips 104, the movable frame 701 is provided with a precise sliding track, ensuring that it maintains a stable trajectory during reciprocating motion and avoiding deviation or shaking. At the same time, a discharge trough 105 is opened at the end of the air outlet duct 5 away from the fan 3. The discharge trough 105 extends to the outside of the recycling box 1. The powder falling off the filter element 4 during reciprocating motion is collected through the discharge trough 105 and discharged to the outside of the recycling box 1. The carrying mechanism is placed in the discharge trough 105 and the discharge port 103 respectively to receive the discharged powder. Secondly, a baffle 6 is provided on the side of the discharge trough 105 away from the filter element 4, which can further guide the powder falling off the filter element 4 into the discharge trough 105.

[0029] Specifically, such as Figure 1 As shown, a protective net 501 is provided at one end of the air outlet duct 5 near the fan 3. For the outside world, the protective net 501 provides an additional safety barrier to prevent hands or other objects from accidentally coming into contact with the high-speed rotating fan blades, thus reducing the risk of accidents during operation.

[0030] Specifically, such as Figure 1 As shown, the discharge port 103 is provided with a receiving port 2, which is conical. The large end of the conical receiving port 2 is connected to the discharge port 103, while the small end points towards the bearing mechanism. This can effectively guide the powder discharged from the discharge port 103 to a designated position, reducing powder scattering or waste.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A powder recycling apparatus for metal 3D printing, characterized by, include: The recycling box (1) is provided with an inlet (106) for metal powder to enter the recycling box (1). The recycling box (1) is also provided with a partition (101) to divide the internal space of the recycling box (1) into two recycling chambers (102). The recycling box (1) is provided with two outlets (103) corresponding to the two recycling chambers (102) respectively and an air outlet channel (5) for air outlet. A fan (3) is provided in the air outlet channel (5) to introduce airflow from the feed inlet (106) into the air outlet channel (5) and to cause the metal powder entering the recycling box (1) to enter different recycling chambers (102).

2. The powder recycling apparatus for metal 3D printing according to claim 1, characterized in that, It also includes a filter element (4), which is slidably disposed in the air outlet channel (5). The fan (3) is provided with a drive component, which is connected to the filter element (4) and is used to make the filter element (4) reciprocate along the height or width direction of the air outlet channel (5).

3. The powder recycling apparatus for metal 3D printing according to claim 2, characterized in that, The driving component includes a driving disc (7) coaxially arranged with the fan (3) and a movable frame (701) slidably arranged in the air outlet channel (5). The filter element (4) is arranged in the movable frame (701). The movable frame (701) is provided with a connecting strip (702). The connecting strip (702) has a driving groove (703). The driving disc (7) is provided with a driving pin (704). The driving pin (704) passes through the driving groove (703).

4. The powder recycling apparatus for metal 3D printing according to claim 3, characterized in that, The air outlet channel (5) is provided with two limiting strips (104) on the inner side, and the movable frame (701) is slidably engaged between the two limiting strips (104).

5. The powder recycling apparatus for metal 3D printing according to claim 2, characterized in that, The air outlet channel (5) has a discharge trough (105) at one end away from the fan (3), and the discharge trough (105) extends to the outside of the recycling box (1).

6. The powder recycling device for metal 3D printing according to claim 5, characterized in that, A baffle (6) is provided on the side of the discharge trough (105) away from the filter element (4).

7. The powder recycling device for metal 3D printing according to claim 1, characterized in that, The air outlet duct (5) is provided with a protective net (501) at one end near the fan (3).

8. The powder recycling apparatus for metal 3D printing according to claim 1, characterized in that, The discharge port (103) is provided with a receiving port (2), which is conical and the larger end of the cone is connected to the discharge port (103).

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