3D printing material powder screening device

Abstract

The utility model discloses a powder screening device for 3D printing materials. The powder screening device comprises a supporting base, an elastic component, a supporting plate, a vibration motor, a first screening hopper and a second screening hopper. The supporting seat is connected with a supporting plate through an elastic component to absorb shock and reduce noise for the device. The first screen hopper is arranged above the second screen hopper and communicated with the second screen hopper, and both the first screen hopper and the second screen hopper are provided with discharge ports and discharge pipes. The first screening hopper is provided with a screening net and a knocking assembly, the knocking assembly comprises connecting rods with different lengths and a fixing block capable of sliding in a sliding way, balls are arranged on the knocking assembly, the knocking block can randomly knock the screening net at different frequencies, blocking is prevented, and the powder screening efficiency and quality are improved. The first screening hopper is provided with a detachable cover plate with a feeding hopper, the supporting seat is provided with a maintenance hole, and cleaning and overhauling are convenient. The device is reasonable in structure, good in screening effect, convenient to maintain and capable of ensuring that the particle size of 3D printing material powder meets the requirement.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing equipment technology, specifically to a 3D printing material powder screening device. Background Technology

[0002] The raw material powders for metal 3D printing are diverse, with common ones including titanium and titanium alloy powders, which are widely used in aerospace and medical fields due to their low density, high specific strength, and good biocompatibility; aluminum alloy powders, with their low density and good thermal conductivity, are used in automotive and electronic equipment manufacturing; stainless steel powders, due to their good corrosion resistance, strength, and toughness, are suitable for the food, chemical, and medical industries; and nickel-based superalloy powders, possessing excellent high-temperature strength and oxidation resistance, are mainly used in hot-end components of aerospace engines. These powders provide the foundation for diversified manufacturing in metal 3D printing.

[0003] In the prior art, a powder sieving device for 3D printing materials, disclosed in publication number "CN221413906U", includes a support frame. A hollow mounting base is fixedly installed at the top of the support frame. A buffer limiting member is provided at the top of the hollow mounting base. A powder sieving component for sieving 3D printing material powder is provided on the hollow mounting base. The powder sieving component and the buffer limiting member are fixedly connected. A discharge pipe for guiding powder is provided on the powder sieving component. A guide pipe is fixedly installed at the top of the support frame, and the guide pipe is located below the discharge pipe. The buffer limiting member includes a snap-fit ​​limiting plate. The inner cavity of the snap-fit ​​limiting plate is fixedly connected to the outer surface of the powder sieving component. A buffer rod is fixedly installed at the bottom end of the snap-fit ​​limiting plate. The end of the buffer rod away from the snap-fit ​​limiting plate is fixedly connected to the top of the hollow mounting base. This utility model not only facilitates powder sieving but also saves time and effort and avoids powder waste.

[0004] However, existing technologies still have significant shortcomings, such as:

[0005] During the sieving process, powder continuously falls onto the screen. Over time, the screen holes are easily clogged by the powder. Furthermore, the traditional vibratory sieving method is relatively simple and the sieving effect is not good. Utility Model Content

[0006] The purpose of this invention is to provide a 3D printing material powder screening device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A 3D printing material sieving device includes a support base, on which a plurality of elastic components are fixedly mounted, and on which a support plate is fixedly mounted. A vibration motor is fixedly mounted on the support plate, and a first sieve hopper and a second sieve hopper are mounted on the support plate. The first sieve hopper and the second sieve hopper are connected. Both the first sieve hopper and the second sieve hopper are provided with a discharge port. The first sieve hopper is provided with a screen and a striking component for striking the screen.

[0009] Preferably, the striking assembly includes several fixed blocks disposed on the first sieve hopper, a connecting rod rotatably disposed on the fixed block, and a striking block fixedly disposed at one end of the connecting rod.

[0010] Preferably, the striking assembly further includes a plurality of slides fixedly disposed on the side wall of the first sieve hopper, and the fixing block is slidably disposed in the slides.

[0011] Preferably, a plurality of ball bearings are rotatably disposed on the fixed block.

[0012] Preferably, both the first and second sieve hoppers are fixedly equipped with discharge pipes at the outlet positions.

[0013] Preferably, the first screen hopper is provided with a detachable cover plate, and the cover plate has a feeding port.

[0014] Preferably, a feeding hopper is fixedly installed at the feeding port position of the cover plate.

[0015] Preferably, the screen is detachably mounted on the first screen hopper.

[0016] Preferably, the support base has a maintenance hole.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Driven by a vibrating motor, the striking block continuously strikes the screen. This dynamic striking method can promptly break up any blockages formed by powder at the screen openings. For example, when fine powder particles are stuck in the screen openings, the vibration generated by the striking can loosen these particles and allow them to return to the screen, continuing the screening process. This avoids the problem of decreased screening efficiency caused by screen blockage and ensures the continuity and stability of the screening operation.

[0019] 2. The sliding track and ball bearing design in the striking assembly allows the fixed block to randomly displace within the track under vibration, thereby driving the striking block to strike the screen at random positions. During long-term use, powder easily accumulates and forms blockages in certain areas of the screen. Random striking precisely targets these randomly appearing blockages. Compared to traditional fixed-position striking methods, this method breaks up powder buildup on the screen more quickly and effectively, ensuring good permeability in all areas of the screen and guaranteeing efficient sieving, thus significantly improving the overall sieving effect of the device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the overall device of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the overall device of this utility model (with the cover plate removed);

[0022] Figure 3 This is a cross-sectional view of the present invention;

[0023] Figure 4 This is a three-dimensional structural cross-sectional view of the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the striking component of this utility model.

[0025] In the diagram: 1. Support base; 11. Maintenance hole; 2. Elastic component; 3. Support plate; 4. Vibration motor; 5. First screen bucket; 51. Screen; 52. Actuating assembly; 521. Fixing block; 5211. Ball bearing; 522. Connecting rod; 523. Actuating block; 53. Slide rail; 6. Second screen bucket; 7. Discharge port; 71. Discharge pipe; 8. Cover plate; 81. Feeding port; 82. Feeding hopper. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 This utility model provides a technical solution:

[0028] Example 1:

[0029] A 3D printing material powder sieving device is mainly used to sieve 3D printing material powder to ensure that the powder particle size meets printing requirements. The device has a compact structure and reasonable design, effectively improving sieving efficiency and quality.

[0030] The bottom of the device is a support base 1, which supports the entire device. Several elastic components 2 are fixedly installed on the support base 1 by welding or bolting. In this embodiment, the elastic components 2 are springs, with one end firmly connected to the support base 1 and the other end fixedly connected to the support plate 3. This connection method allows the support plate 3 to achieve up-and-down elastic vibration under the action of the elastic components 2. Simultaneously, the elastic buffering effect of the springs reduces the impact force on the support base 1 during operation, thus reducing the impact of noise and vibration on the surrounding environment.

[0031] Meanwhile, in this embodiment, the length of each connecting rod 522 can be different. With this setting, the striking block 523 can produce different striking frequencies when striking the screen 51, thereby producing a better filtration effect.

[0032] A vibrating motor 4 is bolted to the support plate 3. The vibrating motor 4 serves as the power source for the entire device, providing vibration force for the powder sieving process. Simultaneously, a first sieve 5 and a second sieve 6 are also installed on the support plate 3. The first sieve 5 is positioned above the second sieve 6, and the first and second sieve 6 are connected and communicated by bolts, ensuring that powder can smoothly flow from the first sieve 5 into the second sieve 6. The second sieve 6 is fixed to the support plate 3 by bolts or welding to ensure the stability of the sieve 6 during vibration.

[0033] Both the first sieve 5 and the second sieve 6 are provided with discharge ports 7, which are located on one side of each sieve 6. At the discharge port 7, a discharge pipe 71 is fixedly installed by welding. The discharge pipe 71 is used to discharge the screened powder from the device for easy collection and subsequent processing.

[0034] The first sieve hopper 5 is equipped with a sieve screen 51 and a striking assembly 52 for striking the sieve screen 51. The striking assembly 52 includes several fixing blocks 521, which are fixed to the first sieve hopper 5 by bolts or slots. A connecting rod 522 is rotatably mounted on the fixing block 521 via a bearing, allowing the connecting rod 522 to rotate flexibly around a fixed point. A striking block 523 is fixed to one end of the connecting rod 522 by welding or bolts. The striking block 523 is used to strike the sieve screen 51 to prevent powder from clogging the sieve holes.

[0035] When the vibration motor 4 is started, it will drive the first sieve 5 and the second sieve 6 to vibrate. The screen 51 on the first sieve 5 will screen the powder. When the first sieve 5 vibrates, the connecting rod 522 can rotate up and down around the fixed block 521 and continuously knock the screen 51, thereby accelerating the filtration of the screen 51. The filtered powder is discharged from the outlet 7 of the second sieve 6, and the unfiltered large particles are discharged from the outlet 7 of the first sieve 5.

[0036] Example 2:

[0037] In this embodiment, the striking component 52 is further optimized. The striking component 52 also includes a plurality of slides 53 fixedly disposed on the side wall of the first sieve hopper 5. The slides 53 are fixed to the side wall by welding or bolts. The fixing block 521 is slidably disposed in the slides 53. The cooperation between the fixing block 521 and the slides 53 is a clearance fit to ensure that the fixing block 521 can slide smoothly in the slides 53.

[0038] Meanwhile, in order to reduce the friction when the fixed block 521 slides in the slide rail 53, a number of balls 5211 are rolled on the fixed block 521. The balls 5211 are installed on the fixed block 521 by means of slots or grooves, and can roll freely on the contact surface between the fixed block 521 and the slide rail 53.

[0039] When the vibration motor 4 starts, it drives the connecting rod 522 to rotate up and down around the fixed block 521. At the same time, the fixed block 521 will also be randomly displaced in the slide 53 due to vibration, so that the striking block 523 will strike the screen 51 at random positions, producing a better striking filtration effect.

[0040] Example 3:

[0041] In this embodiment, a detachable cover plate 8 is provided on the first sieve hopper 5. The cover plate 8 is connected to the first sieve hopper 5 by bolts or clips, making it convenient to open the cover plate 8 for cleaning and maintenance of the inside of the sieve hopper. A feeding port 81 is provided on the cover plate 8, located at the center of the cover plate 8 or near the edge, for easy feeding of the powder to be screened. A feeding hopper 82 is fixed to the cover plate 8 at the feeding port 81 by welding or bolts. The feeding hopper 82 is funnel-shaped and can guide the powder smoothly into the first sieve hopper 5.

[0042] A maintenance hole 11 is provided on the support base 1. The function of the maintenance hole 11 is to facilitate the inspection and maintenance of components such as the vibration motor of the device.

[0043] Working principle:

[0044] When it is necessary to screen 3D printing material powder, the powder to be screened is first fed into the first screen hopper 5 through the feeding hopper 82. The vibration motor 4 is started, and the vibration force generated by the vibration motor 4 is transmitted to the first screen hopper 5 and the second screen hopper 6 through the support plate 3, causing the screen hoppers to start vibrating.

[0045] In the first sieve hopper 5, powder first falls onto the screen 51. Powder that meets the aperture requirements of the screen 51 passes through the screen 51 and falls to the bottom of the second sieve hopper 6, and is discharged through the discharge pipe 71. Larger powder particles remain on the screen 51. During the vibration of the sieve hopper, because the fixed block 521 can slide in the slide rail 53 and the connecting rod 522 can rotate around the fixed block 521, the striking block 523 will continuously strike random positions of the screen 51 under the action of vibration, preventing powder from clogging the screen holes and improving the powder screening efficiency.

[0046] The powder after being screened by the first sieve 5 flows into the second sieve 6 and is discharged through the discharge pipe 71 of the second sieve 6. The entire powder screening process is carried out continuously under the continuous action of the vibrating motor 4 until all the powder is screened.

[0047] When the device needs cleaning or maintenance, the removable cover plate 8 on the first screen hopper 5 can be opened to clean the screen 51 and the inside of the screen hopper; the internal components of the device can also be inspected and replaced through the maintenance hole 11 on the support base 1.

[0048] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A 3D printing material sieving device, comprising a support base (1), wherein a plurality of elastic components (2) are fixedly disposed on the support base (1), a support plate (3) is fixedly disposed on the elastic components (2), and a vibration motor (4) is fixedly disposed on the support plate (3), characterized in that: The support plate (3) is provided with a first sieve hopper (5) and a second sieve hopper (6), the first sieve hopper (5) and the second sieve hopper (6) are connected, and both the first sieve hopper (5) and the second sieve hopper (6) are provided with a discharge port (7). The first sieve hopper (5) is provided with a screen (51) and a striking component (52) for striking the screen (51).

2. The 3D printing material powder sieving device according to claim 1, characterized in that: The striking assembly (52) includes several fixed blocks (521) disposed on the first sieve hopper (5), a connecting rod (522) is rotatably disposed on the fixed block (521), and a striking block (523) is fixedly disposed at one end of the connecting rod (522).

3. The 3D printing material powder sieving device according to claim 2, characterized in that: The striking assembly (52) also includes several slides (53) fixedly disposed on the side wall of the first sieve hopper (5), and the fixing block (521) is slidably disposed in the slides (53).

4. The 3D printing material powder sieving device according to claim 3, characterized in that: A plurality of ball bearings (5211) are rolled on the fixed block (521).

5. A 3D printing material powder sieving device according to claim 1, characterized in that: The first sieve hopper (5) and the second sieve hopper (6) are both fixedly equipped with discharge pipes (71) at the discharge port (7).

6. A 3D printing material powder sieving device according to claim 2, characterized in that: The first sieve hopper (5) is provided with a detachable cover plate (8), and the cover plate (8) is provided with a feeding port (81).

7. A 3D printing material powder sieving device according to claim 6, characterized in that: The cover plate (8) is fixedly equipped with a feeding hopper (82) at the feeding port (81).

8. A 3D printing material powder sieving device according to any one of claims 1-7, characterized in that: The screen (51) is detachably mounted on the first screen hopper (5).

9. A 3D printing material powder sieving device according to claim 1, characterized in that: The support base (1) is provided with a maintenance hole (11).

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