Device for powder sieving and grouping

Abstract

The application relates to a powder screening and collecting device in the field of powder manufacturing, which comprises the following: a ring-shaped frame; a mesh plate assembled in the ring-shaped frame, the mesh plate separating the ring-shaped frame into a first chamber and a second chamber; a material collecting bin assembled in the ring-shaped frame and located in the second chamber, a powder discharging port being formed on the side of the material collecting bin away from the mesh plate; a coarse particle discharging port arranged on the ring-shaped frame; and mirror surface treatment being performed on at least the surface of the mesh plate facing the first chamber, the surface of the material collecting bin facing the mesh plate and the inner side of the ring-shaped frame. The powder screening and collecting device can realize accurate screening of metal powder and coarse particles, reduce the abrasion of spherical metal powder, maintain the smoothness of the surface of the spherical metal powder and improve the use performance of the metal powder.

Description

Technical Field

[0001] This application relates to the field of powder manufacturing, and in particular to a powder sieving and collecting device. This application claims priority to an earlier application with application number 202421670536X, entitled "Powder Sieving and Collecting Device," prior to which the priority date is 2024-07-15. Background Technology

[0002] In the production of metal powder, the performance of the powder varies due to the different particle sizes. Therefore, the powder is graded according to its different uses. As a metal powder, the surface structure is one of the important indicators affecting the product performance. The preparation of metal powder belongs to the field of highly automated production. After the metal powder is prepared, it will be initially screened and collected, and then transported to a screening machine for fine screening. However, the current equipment used for initial screening and collection of powder is prone to damaging the surface structure of metal powder during the initial screening and transportation process. Utility Model Content

[0003] In view of the problems existing in the background technology, this application provides a powder screening and collection device, which can achieve precise screening of metal powder and coarse particles, reduce the wear of spherical metal powder, maintain the surface smoothness of spherical metal powder, and thus improve the performance of metal powder.

[0004] According to one aspect of the present invention, a powder sieving and collecting device is provided, comprising: an annular frame; a perforated plate, the perforated plate being assembled within the annular frame and dividing the annular frame into a first chamber and a second chamber, the first chamber being located above the second chamber; a material collection bin, the material collection bin being assembled within the annular frame and located in the second chamber, the side of the material collection bin away from the perforated plate forming a powder discharge port; a coarse particle discharge port, the coarse particle discharge port being disposed on the annular frame and communicating with the first chamber and the outer side of the annular frame; and at least the surface of the perforated plate facing the first chamber, the surface of the material collection bin facing the perforated plate, and the inner side of the annular frame being mirror-finished.

[0005] In some embodiments of this utility model, the powder sieving and collecting device further includes: a reinforcing support rib, which is installed on the outside of the annular frame.

[0006] In some embodiments of this utility model, the powder sieving and collecting device further includes: a support and fixing structure, which is installed inside the annular frame and is used to support and limit the mesh plate.

[0007] In some embodiments of this utility model, the supporting and fixing structure includes: an annular baffle, which is fixed to the inner wall of the annular frame, and the outer ring of the perforated plate is supported on the annular baffle; and a support rod, whose two ends are respectively connected to the annular baffle, and the support rod is used to provide support for the inner ring area of ​​the perforated plate.

[0008] In some embodiments of this utility model, a first annular stabilizing frame and a second annular stabilizing frame are fixed on the side of the mesh plate facing the annular baffle; the first annular stabilizing frame is disposed directly opposite to the annular baffle; the second annular stabilizing frame is located inside the first annular stabilizing frame and is spaced apart from the first annular stabilizing frame.

[0009] In some embodiments of this utility model, the aggregate bin and the perforated plate are arranged at intervals.

[0010] In some embodiments of this utility model, the diameter of the aggregate bin gradually decreases from the side near the perforated plate to the side of the powder discharge port.

[0011] In some embodiments of this utility model, the powder discharge port is located near the middle of the aggregate bin.

[0012] In some embodiments of this utility model, the aggregate bin is an integrally molded structure.

[0013] In some embodiments of this utility model, the annular frame, the perforated plate, and the material hopper are made of stainless steel.

[0014] This application provides a powder sieving and collecting device. This device, via a ring frame, can be directly and fixedly connected to a sieving machine and is used to collect metal powder prepared by an atomizing body. The metal powder first enters the first chamber, where the sieving machine's drive structure drives the ring frame and its internal perforated plate to generate three-dimensional composite vibration. This causes the metal powder to move in a spiral trajectory on the surface of the perforated plate, allowing the material to diffuse from the central area of ​​the perforated plate outwards. Metal powder conforming to the perforation design of the perforated plate falls through the perforated plate into the lower collection bin and then to the sieving machine for classification. Coarse particles are separated from the coarse particles by centrifugal force from the edge of the perforated plate. The granules are conveyed out through the discharge port, which greatly reduces the complexity of the atomization equipment and the powder transportation path. It can be directly installed above a single-layer screen to complete double-layer screening with one screening machine. Due to the uniqueness of this device, the powder can be concentrated, directly avoiding the problem of poor powder screening and grading effect when using double-layer screens, thus improving the powder grading effect. At the same time, the mirror treatment of the perforated plate, the material collection bin, and the ring frame can reduce the wear of powder during the screening process. In addition, the equipment is extremely simple to install and operate, which can greatly improve the operating efficiency of operators and improve the level of automation in metal powder preparation. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of the powder sieving and collection device according to an embodiment of this application;

[0017] Figure 2 This is a top view of the powder sieving and collection apparatus according to an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the powder sieving and collection device and sieving machine assembly of this application;

[0019] Figure 4 This is a schematic diagram of the spiral trajectory movement of the metal powder on the surface of the perforated plate in this application;

[0020] Figure 5 This is a schematic diagram of a dust cover installed on the top of the ring-shaped frame of this application.

[0021] The labels in the attached diagram represent the following: 1. Annular frame; 2. Mesh plate; 3. Aggregating hopper; 4. Powder discharge port; 5. Coarse particle discharge port; 6. Reinforcing support rib; 7. Annular baffle; 8. Support rod; 9. First annular stabilizing frame; 10. Second annular stabilizing frame; 11. Base; 12. Fixing frame; 13. Support spring; 14. Rotary motor; 15. Upper counterweight; 16. Lower counterweight; 17. Screen; 18. Conical plate; 19. First material discharge port; 20. Second material discharge port; 21. Metal retaining ring; 22. Dust cover; 23. Feed inlet; 24. Observation window. Detailed Implementation

[0022] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0023] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0024] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0025] The powder sieving and collection apparatus provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0026] This application discloses a powder sieving and collection device. For example... Figure 1 and Figure 2 As shown, the powder screening and collection device includes an annular frame 1, a perforated plate 2, a material collection bin 3, and a coarse particle discharge port 5.

[0027] The perforated plate 2 is assembled inside the annular frame 1, dividing the annular frame 1 into a first chamber and a second chamber, with the first chamber located above the second chamber. The aggregate bin 3 is assembled inside the annular frame 1, located in the second chamber, with a powder discharge port 4 formed on the side of the aggregate bin 3 away from the perforated plate 2. The coarse particle discharge port 5 is located on the annular frame 1, connecting the first chamber with the outer side of the annular frame 1. In addition, at least the surface of the perforated plate 2 facing the first chamber, the surface of the aggregate bin 3 facing the perforated plate 2, and the inner side of the annular frame 1 are mirror-finished.

[0028] In the application process, the annular frame 1 can be directly installed on the sieve or above a layer of sieve mesh, and the first chamber can be connected to the powder discharge port of the atomizing body to receive the metal powder prepared by the atomizing body.

[0029] In some embodiments of this utility model, such as Figure 3 As shown, the screening machine can specifically be a rotary vibrating screen. The screening machine includes a base 11 and a fixed frame 12 spaced on the base 11. The base 11 and the fixed frame 12 can be connected by multiple support springs 13. The multiple support springs 13 are arranged in a ring and spaced apart. A rotary motor 14 is also fixed at the bottom of the fixed frame 12 by an L-shaped bracket. The upper and lower ends of the output shaft of the rotary motor 14 are respectively fixed with an upper counterweight 15 and a lower counterweight 16. A layer of screen 17 and a layer of upwardly protruding conical plate 18 are respectively fixed inside the fixed frame 12 from top to bottom. A first material discharge port 19 communicating with the space inside the fixed frame 12 is provided on the outside of the fixed frame 12 corresponding to the screen 17, and a second material discharge port 20 communicating with the space inside the fixed frame 12 is provided on the conical plate 18.

[0030] like Figure 3 As shown, it should be understood that during application, the annular frame 1 can be fastened to the top of the fixed frame 12, and the annular frame 1 and the fixed frame 12 can be fixed by means of flanges, snap-fit ​​structures or bolts, etc., and the powder discharge port of the atomizing body can be extended to the top of the central area of ​​the first chamber.

[0031] By using the powder sieving and collecting device in this technical solution, the metal powder, after being prepared by the atomization body, first enters the first chamber. The rotary motor 14 drives the upper weight 15 and the lower weight 16 to rotate. In conjunction with the support spring 13 connected between the fixed frame 12 and the base 11, this causes the fixed frame 12, its internal screen 17 and conical plate 18, and the annular frame 1 and its internal perforated plate 2 to generate three-dimensional composite vibration. This causes the metal powder to first move in a spiral trajectory on the surface of the perforated plate 2, allowing the material to diffuse from the central area of ​​the perforated plate 2 outwards. The movement trajectory is as follows: Figure 4As indicated by the black arrow, during the diffusion process, metal powder conforming to the perforation design of the mesh plate 2 will fall through the mesh plate 2 into the lower aggregate bin 3, and from the aggregate bin 3 to the screen 17 for grading. Coarse particles are driven to the edge of the mesh plate 2 under the action of centrifugal force and are conveyed out from the edge of the mesh plate 2 through the coarse particle outlet 5. The initial screening of the mesh plate 2 and the coarse particle outlet 5, as well as the mirror-finished mesh plate 2, aggregate bin 3, and annular frame 1, can not only achieve the precise screening of the required metal powder and coarse particles, but also allow the metal powder after removing coarse particles to directly enter the screening machine and be screened by the screen 17, which greatly reduces the transport path of the powder, reduces the wear of spherical metal powder, and ensures the smoothness of the surface of spherical metal powder, thereby improving the performance of the metal powder.

[0032] In this invention, the metal powder after removing coarse particles will fall from the powder discharge port 4 at the bottom of the aggregate bin 3 onto the screen 17. Similarly, the metal powder will move in a spiral trajectory on the surface of the screen 17. Metal powder with a particle size larger than the aperture of the screen 17 will be discharged from the first material discharge port 19 at the edge of the screen 17, while metal powder with a particle size smaller than the aperture of the screen 17 will pass through the screen 17 and fall onto the conical plate 18 and finally be discharged from the second material discharge port 20.

[0033] Specifically, in this embodiment, the perforated plate 2 has a structure with uniformly arranged circular holes, and each circular hole has the same size, so as to effectively separate the required spherical metal powder from blocky, flake and other coarse particles.

[0034] It should be noted that, in addition to mirror finishing on the surfaces of the perforated plate 2, the material hopper 3, and the annular frame 1 that come into contact with the metal powder, mirror finishing can also be applied to other parts of the perforated plate 2, the material hopper 3, and the annular frame 1 as needed.

[0035] For example, in this embodiment, the edges of the circular holes of the perforated plate 2 are also mirror-finished to ensure that there are no burrs and that the surface is bright, so as to minimize the damage to the metal powder when it passes through the circular holes.

[0036] Furthermore, mirror finishing includes, but is not limited to, mechanical polishing, chemical polishing, and other treatments, to give the perforated plate 2, the material hopper 3, and the annular frame 1 a smooth surface.

[0037] Furthermore, the annular frame 1 includes, but is not limited to, square frames, rectangular frames, circular frames, etc., with a circular frame being preferred, that is, a cylindrical structure with open upper and lower ends, so as to fix it to the vibrating screen.

[0038] In some embodiments of this utility model, such as Figure 1 As shown, the powder sieving and collection device also includes a reinforcing support rib 6, which is installed on the outside of the annular frame 1.

[0039] By reinforcing the support ribs 6 as secondary supports to provide panel support for the annular frame 1, the stability and safety of the powder screening and collection device are ensured.

[0040] It should be noted that multiple reinforcing ribs 6 can be arranged on the outer surface of the annular frame 1, such as in a horizontal or vertical arrangement.

[0041] Specifically, in this embodiment, a reinforcing support rib 6 is fixed around the annular frame 1 at both the upper and lower ends.

[0042] Furthermore, in this embodiment, the reinforcing support rib 6 at the lower end of the annular frame 1 can be connected to the annular flange at the top of the fixed frame 12 via a metal clamping ring 21 and a high-strength bolt (not shown).

[0043] Specifically, the cross-section of the metal band 21 is U-shaped and can be segmented, such as two or three segments. Each segment of the metal band 21 has a seat (not shown) formed at both ends for bolts to pass through. When the U-shaped space of each segment of the metal band 21 covers the annular flange of the reinforcing support rib 6 and the fixing frame 12, a certain gap is left between adjacent segments of the metal band 21. The bolts are passed through the two seats and tightened with nuts. In this way, multiple segments of the metal band 21 can be connected into a whole and tightened, thereby firmly connecting the annular frame 1 and the fixing frame 12 together.

[0044] In some embodiments of this utility model, such as Figure 1 As shown, the powder sieving and collection device also includes a support and fixing structure, which is installed inside the annular frame 1 and is used to support and limit the mesh plate 2.

[0045] Specifically, in this embodiment, the supporting and fixing structure includes an annular baffle 7 and a support rod 8. The annular baffle 7 is fixed to the inner wall of the annular frame 1, and the outer edge of the perforated plate 2 is supported on the annular baffle 7. The two ends of the support rod 8 are respectively connected to the annular baffle 7, and the support rod 8 is used to form line support for the inner ring area of ​​the perforated plate 2.

[0046] It should be noted that in other embodiments, the annular baffle 7 can also be configured as multiple spaced baffles, ensuring that the upper surfaces of the multiple baffles are on the same horizontal plane so that they can make contact with all parts of the perforated plate 2; multiple support rods 8 can be connected on the annular baffle 7, for example, arranged in parallel intervals or in a cross pattern, and when arranged in parallel intervals or in a cross pattern, each support rod 8 is on the same horizontal plane.

[0047] In some embodiments of this utility model, such as Figure 1As shown, a first annular stabilizing frame 9 and a second annular stabilizing frame 10 are fixed on the side of the perforated plate 2 facing the annular baffle 7; the first annular stabilizing frame 9 is directly opposite the annular baffle 7; the second annular stabilizing frame 10 is located inside the first annular stabilizing frame 9 and is spaced apart from the first annular stabilizing frame 9.

[0048] The first annular stabilizing frame 9 and the second annular stabilizing frame 10 can enhance the structural stability of the perforated plate 2 and facilitate the installation and disassembly of the perforated plate 2.

[0049] It should be noted that multiple second annular stabilizing frames 10 can be installed within the first annular stabilizing frame 9 by layering them together. The specific number can be set according to the size of the perforated plate 2.

[0050] In some embodiments of this utility model, such as Figure 1 As shown, the material collection bin 3 and the perforated plate 2 are spaced apart to ensure that there is enough space on the material collection bin 3 to complete the collection of metal powder. The distance between the material collection bin 3 and the perforated plate 2 should not be too large or too small. The specific distance can be determined according to the production efficiency of metal powder, the initial screening rate, and the height at which it is easily damaged by collision after falling.

[0051] In some embodiments of this utility model, such as Figure 1 As shown, the diameter of the material collection bin 3 gradually decreases from the side near the mesh plate 2 to the side of the powder discharge port 4, presenting a frustum or truncated cone structure, which facilitates powder collection and conveys the powder to the designated position of the screening machine.

[0052] Furthermore, the powder discharge port 4 is located near the middle of the aggregate bin 3.

[0053] In some embodiments of this utility model, the aggregate bin 3 is an integrally molded structure with no weld seams. Combined with its mirror-finished bright surface structure, it further reduces the possibility of damage to the surface of the spherical metal powder.

[0054] In some embodiments of this utility model, the annular frame 1, the perforated plate 2, and the material hopper 3 are all made of stainless steel, preferably 304 stainless steel.

[0055] Furthermore, the annular frame 1 is made from a single piece of stainless steel plate, and the welded joints are polished smooth without burrs. The perforated plate 2 is a one-piece molded structure without any welding points. The material collection bin 3 and the powder discharge port 4 are a one-piece molded structure with a smooth transition, ensuring that the metal powder collected on the material collection bin 3 slides smoothly out of the powder discharge port 4.

[0056] In some embodiments of this utility model, such as Figure 1 and Figure 2As shown, the lower edge of the coarse particle outlet 5 near the internal interface of the first chamber is slightly lower than the perforated plate 2, and the upper edge is higher than the perforated plate 2. The coarse particle outlet 5 is located outside the annular frame 1 and can be equipped with a quick-connect flange to ensure convenient installation and use.

[0057] Furthermore, the connection between the coarse particle outlet 5 and the perforated plate 2, as well as its own surface structure, are all polished smooth, and the overall surface has a glossy structure.

[0058] In some embodiments of this utility model, such as Figure 5 As shown, a dust cover 22 can also be provided on the top of the annular frame 1. Similarly, an annular flange can also be provided at the bottom of the dust cover 22. The reinforcing support rib 6 at the top of the annular frame 1 can be connected to the annular flange at the bottom of the dust cover 22 by means of a metal clamping ring 21 and a high-strength bolt.

[0059] Furthermore, a feed inlet 23 can be opened at the center of the top of the dust cover 22. The feed inlet 23 can be connected to the powder discharge port of the atomizing body through a flexible hose, so that the powder can be transported to the first chamber, reducing the impact of possible dust on the working environment. Moreover, the flexible connection between the feed inlet 23 and the atomizing body effectively avoids the impact on the three-dimensional composite vibration of the rotating motor 14 driving the fixed frame 12 and the ring frame 1.

[0060] Furthermore, an observation window 24 is provided at the top of the dust cover 22, away from the feed inlet 23, to observe the movement of materials on the perforated plate 2.

[0061] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A device for powder sieving and collection, characterized in that, include: Ring frame; A perforated plate, which is assembled inside the annular frame, divides the annular frame into a first chamber and a second chamber, with the first chamber located above the second chamber; A material collection bin is assembled within the annular frame. The material collection bin is located in the second chamber, and a powder discharge port is formed on the side of the material collection bin away from the perforated plate. A coarse particle discharge port is provided on the annular frame and connects the first chamber with the outside of the annular frame. At least the surface of the perforated plate facing the first chamber, the surface of the aggregate bin facing the perforated plate, and the inner side of the annular frame are mirror-finished.

2. The powder sieving and collection device according to claim 1, characterized in that, Also includes: A reinforcing support rib is installed on the outside of the annular frame.

3. The powder sieving and collection device according to claim 1, characterized in that, Also includes: A support and fixing structure is installed inside the annular frame to support and limit the perforated plate.

4. The powder sieving and collection device according to claim 3, characterized in that, The supporting and fixing structure includes: An annular baffle is fixed to the inner wall of the annular frame, and the outer ring of the perforated plate is supported on the annular baffle. A support rod, with its two ends connected to the annular baffle, is used to provide support for the inner ring area of ​​the perforated plate.

5. The powder sieving and collection device according to claim 4, characterized in that, The perforated plate is fixed with a first annular stabilizing frame and a second annular stabilizing frame on the side facing the annular baffle. The first annular stabilizing frame is positioned directly opposite the annular baffle. The second annular stabilizing frame is located inside the first annular stabilizing frame and is spaced apart from the first annular stabilizing frame.

6. The powder sieving and collection device according to claim 1, characterized in that, The aggregate bins are spaced apart from the perforated plate.

7. The powder sieving and collecting device according to claim 6, characterized in that, The diameter of the aggregate bin gradually decreases from the side closest to the perforated plate toward the powder discharge port.

8. The powder sieving and collecting device according to claim 7, characterized in that, The powder discharge port is located near the middle of the aggregate bin.

9. The powder sieving and collection device according to claim 7, characterized in that, The aggregate bin is a one-piece molded structure.

10. The powder sieving and collection device according to claim 1, characterized in that, The ring frame, perforated plate, and material hopper are made of stainless steel.

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