Powder screening device for preparing neodymium iron boron magnetic particles

Abstract

The utility model belongs to the technical field of powder screening, and particularly relates to a powder screening device for preparing neodymium iron boron magnetic particles, which comprises a screening box, universal wheels are fixedly connected to the periphery of the bottom of the screening box, a feeding bin is arranged at the top of the screening box, and the outside of the feeding bin is fixedly connected with the feeding bin through a fixing block. An anti-blocking mechanism is arranged at the bottom of the feeding bin, and a screening mechanism is arranged in the screening box. The screening mechanism comprises a screening unit and a vibration unit; the screening unit comprises connecting blocks, a screening disc, a first spring, a first air cylinder, a second supporting block, a second spring and a screening plate, and the two connecting blocks are fixedly connected to the upper portion of the interior of the screening box. According to the powder screening device for neodymium iron boron magnetic particle preparation, through the two sets of screening plates with different screening hole sizes, multi-stage screening of powder is achieved, powder of different particle sizes is effectively separated out, the powder screening requirements of different particle size requirements are met, and the screening efficiency and precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder screening, in particular to a powder screening device for preparing NdFeB magnetic particles. Background Art

[0002] NdFeB magnets are tetragonal crystals formed by neodymium, iron and boron. They are permanent magnets with magnetic properties second only to absolute zero holmium magnets and are also the most commonly used rare earth magnets. NdFeB magnets are widely used in electronic products such as hard disks, mobile phones, headphones and battery-powered tools. NdFeB magnets are divided into sintered NdFeB and bonded NdFeB. Bonded NdFeB has magnetism in all directions and is corrosion-resistant; sintered NdFeB is prone to corrosion and requires surface coating.

[0003] Most of the existing NdFeB magnetic powders are screened in single-layer screening during production, which is inefficient. The screened NdFeB magnetic powders are not processed in time, which results in the need for additional processing, thus increasing working time and labor costs.

[0004] To this end, we propose a powder screening device for preparing NdFeB magnetic particles to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a powder screening device for preparing NdFeB magnetic particles, so as to solve the problem of low efficiency of the screening method proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a powder screening device for preparing NdFeB magnetic particles, comprising a screening box, the bottom of the screening box is fixedly connected with universal wheels, the top of the screening box is provided with a feed bin, the outside of the feed bin is fixedly connected to the feed bin through a fixed block, the bottom of the feed bin is provided with an anti-blocking mechanism, and the inside of the screening box is provided with a screening mechanism;

[0007] The screening mechanism comprises a screening unit and a vibration unit;

[0008] The screening unit comprises a connecting block, a sieve plate, a spring 1, a cylinder 1, a support block 2, a spring 2 and a screening plate, wherein two connecting blocks are respectively fixedly connected to the upper part of the inside of the screening box, and a placement groove is provided on one side of the two connecting blocks close to each other, one end of the spring 1 is fixedly connected to the placement groove, and the two ends of the sieve plate are respectively fixedly connected to the other end of the spring 1, the cylinder 1 is arranged in the placement groove of the right connecting block, and the output end of the cylinder 1 is connected to the right side of the sieve plate, and the two support blocks 2 are respectively arranged below the sieve plate, the spring 2 is fixedly connected to the upper surface of the support block 2, and the two ends of the screening plate are fixedly connected to the top of the spring 2;

[0009] The vibration unit comprises a cam and a motor, wherein the cam is abutted against the bottom of the screening plate, the motor is arranged on the right side of the screening box, and the motor is connected to one side of the cam through a coupling.

[0010] Preferably, the second support block, the second spring and the screening plate have two groups, which are arranged in an upper and lower position respectively. The left side of the screening plate is provided with a screening port, which can form a multi-level screening structure. Through the screening plates with different sieve hole sizes, the powder can be screened at multiple levels to achieve effective separation of powders of different particle sizes. The setting of the screening port allows the screened powder to be discharged smoothly, thereby improving the screening efficiency.

[0011] Preferably, the mesh of the upper sieve plate is larger than the mesh of the lower sieve plate, so that the particles first pass through the sieve plate with larger mesh, the larger particles are initially screened out, and then the smaller particles pass through the sieve plate with smaller mesh for further screening. In this way, more precise particle size control can be achieved to meet the needs of powder screening with different particle size requirements.

[0012] Preferably, the anti-blocking mechanism includes a damping rod, a spring three, a vibration plate and a vibration motor, the damping rod is connected around the bottom of the feed bin, the spring three is arranged on the outside of the damping rod, the vibration plate is fixedly connected around the bottom of the damping rod, and the output end of the vibration motor is connected to the middle part below the vibration plate. The vibration motor drives the vibration plate to vibrate, which can effectively prevent powder from being blocked in the feed bin, ensure smooth flow and uniform feeding of powder, and improve screening efficiency and accuracy.

[0013] Preferably, the front of the screening box is hinged with a box door, and the front of the box door is fixedly connected with a handle. The design of the box door is convenient for cleaning, maintenance and repair of the inside of the screening box. The box door can be easily opened or closed by the handle, which is easy to operate and improves the usability and maintainability of the equipment.

[0014] Preferably, a dust box is fixedly connected to the back of the screening box, an air pump is fixedly connected to the lower part of the dust box, support blocks 1 are fixedly connected to both sides of the inner wall of the dust box, a filter is connected to the upper surface of the support block 1, and a dust pipe is fixedly connected to the top of the dust box. Dust pollution may be generated during the screening process. The setting of the dust box and the air pump can effectively absorb and filter the generated dust, reducing the harm of dust to the environment and operators. The filter can further ensure the quality of the discharged air and protect the working environment.

[0015] Preferably, a cylinder 2 is fixedly connected to the back side of the screening box, and a push plate is connected to the output end of the cylinder 2. The arrangement of the cylinder 2 and the push plate can be used to clean the powder remaining on the bottom surface of the box. After the screening is completed, the push plate can be pushed by cylinder 2 to push the residue to a designated position, which is convenient for subsequent cleaning and collection, thereby improving the cleanliness and utilization efficiency of the equipment.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The powder screening device for preparing NdFeB magnetic particles realizes multi-stage screening of powders through two sets of screening plates with different sieve hole sizes, effectively separates powders of different particle sizes, meets the screening needs of powders with different particle size requirements, and improves screening efficiency and accuracy.

[0018] 2. The powder screening device for preparing NdFeB magnetic particles has an anti-blocking mechanism at the bottom of the feed bin that drives the vibration plate to vibrate through a vibration motor, which effectively prevents the powder from being blocked in the feed bin, ensures smooth flow and uniform feeding of the powder, and improves the stability and efficiency of the screening process.

[0019] 3. The powder screening device for preparing NdFeB magnetic particles, the dust collecting box and the suction pump can absorb and filter the dust generated during the screening process, reducing the harm of dust to the environment and operators. At the same time, the filter screen further ensures the quality of the discharged air and protects the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall front structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the overall back structure of the utility model;

[0022] Figure 3 It is a schematic diagram of the overall internal structure of the utility model;

[0023] Figure 4 It is a schematic diagram of the overall side internal structure of the utility model;

[0024] Figure 5 This is a schematic diagram of the sieve plate structure of the utility model.

[0025] In the figure: 1 screening box, 101 box door, 102 handle, 2 feeding silo, 201 fixing block, 202 damping rod, 203 spring three, 204 vibration plate, 205 vibration motor, 3 universal wheel, 4 dust suction box, 401 dust suction pipe, 402 support block one, 403 filter screen, 404 suction pump, 501 connecting block, 502 sieve plate, 503 spring one, 504 cylinder one, 601 support block two, 602 spring two, 603 screening plate, 701 cam, 702 motor, 801 cylinder two, 802 push plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0028] Embodiment 1:

[0029] A powder screening device for preparing NdFeB magnetic particles comprises a screening box 1, a door 101 is hinged on the front of the screening box 1, a handle 102 is fixedly connected to the front of the door 101, and the design of the door 101 facilitates cleaning, maintenance and repair of the inside of the screening box 1. The handle 102 makes it more convenient to open or close the door 101, thereby improving the usability of the device. A dust collecting box 4 is fixedly connected to the back of the screening box 1, and cooperates with a suction pump 404 to effectively absorb and filter the dust generated during the screening process, thereby reducing the harm to the environment and operators. An air pump 404 is fixedly connected to the lower part of the dust box 4, and support blocks 1 402 are fixedly connected to both sides of the inner wall of the dust box 4. A filter screen 403 is connected to the upper surface of the support block 1 402. The support block 1 402 is used to fix the filter screen 403. The filter screen 403 ensures the quality of the discharged air. A dust suction pipe (401) is fixedly connected to the upper part of the dust box 4. The dust suction pipe 401 is used to suck the dust into the dust box 4. The back of the screening box 1 is fixedly connected to the cylinder 2 801. The output end of the cylinder 2 801 is connected to the push plate 802. The cylinder 2 801 pushes the push plate 802 to move, which is used to clean the powder remaining on the bottom surface of the screening box 1, thereby improving the cleanliness and use efficiency of the equipment.

[0030] Universal wheels 3 are fixedly connected around the bottom of the screening box 1, making the entire device easy to move and carry, increasing the flexibility and convenience of use. A feed bin 2 is set on the top of the screening box 1. The outside of the feed bin 2 is fixedly connected to the feed bin 2 through a fixed block 201. The feed bin 2 is used to add powder to be screened, and the fixed block 201 is used to fix the feed bin 2 to ensure its stability. An anti-blocking mechanism is set at the bottom of the feed bin 2, and a screening mechanism is set inside the screening box 1;

[0031] The screening mechanism includes a screening unit and a vibration unit;

[0032] The screening unit includes a connecting block 501, a sieve plate 502, a spring 1 503, a cylinder 1 504, a supporting block 2 601, a spring 2 602 and a screening plate 603. The two connecting blocks 501 are respectively fixedly connected to the upper part of the inside of the screening box 1. The two connecting blocks 501 are close to each other and have a placement groove on one side. One end of the spring 1 503 is fixedly connected to the placement groove. The two ends of the sieve plate 502 are respectively fixedly connected to the other end of the spring 1 503. The cylinder 1 504 is arranged in the placement groove of the right connecting block 501. The output end of the cylinder 1 504 is connected to the sieve plate 50 On the right side, two support blocks 601 are respectively arranged below the sieve plate 502, springs 602 are fixedly connected to the upper surface of support blocks 601, and both ends of screening plates 603 are fixedly connected to the top of springs 602. There are two groups of support blocks 601, springs 602 and screening plates 603, which are arranged up and down respectively. A screening opening is opened on the left side of the screening plates 603. The sieve holes of the upper screening plates 603 are larger than those of the lower screening plates 603. Multi-stage screening is achieved through the screening plates 603 with different sieve hole sizes, thereby improving screening efficiency and accuracy.

[0033] The vibration unit includes a cam 701 and a motor 702. The cam 701 abuts against the bottom of the screening plate 603. The motor 702 is arranged on the right side of the screening box 1. The motor 702 is connected to one side of the cam 701 through a coupling. The cam 701 is driven by the motor 702 to make the screening plate 603 vibrate, thereby improving the screening efficiency.

[0034] Embodiment 2:

[0035] On the basis of the first embodiment, the anti-blocking mechanism includes a damping rod 202, a spring three 203, a vibration plate 204 and a vibration motor 205. The damping rod 202 is connected to the bottom of the feed bin 2 to support and fix the vibration plate 204 to ensure the vibration effect. The spring three 203 is arranged on the outside of the damping rod 202 to play a buffering role during the vibration process and reduce the impact of the vibration on the device. The vibration plate 204 is fixedly connected to the bottom of the damping rod 202, and the output end of the vibration motor 205 is connected to the middle of the bottom of the vibration plate 204. The vibration motor 205 is driven to prevent the powder from being blocked in the feed bin 2, ensuring the smooth flow of the powder and uniform feeding.

[0036] Working principle: When powder needs to be screened, the powder to be screened is added to the screening box 1 through the feed bin 2. When the powder enters the feed bin 2, the vibration motor 205 drives the vibration plate 204 to vibrate. The vibration of the vibration plate 204 prevents the powder from being blocked in the feed bin 2, ensuring the smooth flow and uniform feeding of the powder. The damping rod 202 and the spring three 203 respectively play a supporting and buffering role to ensure the stable vibration of the vibration plate 204. During the screening process, the dust generated is sucked into the dust box 4 through the dust suction pipe 401. The suction pump 404 works to suck the dust into the dust box 4. After being filtered by the filter net 403, the clean air is discharged and the dust is collected in the dust box 4.

[0037] The screening plate 603 moves horizontally under the action of the cylinder 1 504 and the spring 1 503, and the motor 702 drives the cam 701 to rotate, so that the screening plate 603 vibrates, and the powder is screened on the screening plate 603. The powder is divided into different particle sizes through the screening plates 603 with different mesh sizes and discharged from the screening port. After the screening is completed, the push plate 802 is pushed by the cylinder 2 801 to move the powder remaining on the bottom surface of the screening box 1 to the designated position for subsequent cleaning and collection.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A powder screening device for preparing NdFeB magnetic particles, comprising a screening box (1), characterized in that: Universal wheels (3) are fixedly connected around the bottom of the screening box (1), a feed bin (2) is arranged on the top of the screening box (1), the outside of the feed bin (2) is fixedly connected to the feed bin (2) via a fixed block (201), an anti-blocking mechanism is arranged at the bottom of the feed bin (2), and a screening mechanism is arranged inside the screening box (1); The screening mechanism comprises a screening unit and a vibration unit; The screening unit comprises a connecting block (501), a screening plate (502), a spring (503), a cylinder (504), a supporting block (601), a spring (602) and a screening plate (603). The two connecting blocks (501) are respectively fixedly connected to the upper part of the screening box (1). A placement groove is provided on one side of the two connecting blocks (501) close to each other. One end of the spring (503) is fixedly connected to the placement groove. The two ends of the screening plate (502) are respectively fixedly connected to the upper part of the screening box (1). The cylinder 1 (504) is arranged in the placement groove of the right connecting block (501), the output end of the cylinder 1 (504) is connected to the right side of the sieve plate (502), the two supporting blocks 2 (601) are respectively arranged below the sieve plate (502), the spring 2 (602) is fixedly connected to the upper surface of the supporting block 2 (601), and the two ends of the sieve plate (603) are fixedly connected to the top of the spring 2 (602); The vibration unit comprises a cam (701) and a motor (702), wherein the cam (701) is in contact with the bottom of the screening plate (603), the motor (702) is arranged on the right side of the screening box (1), and the motor (702) is connected to one side of the cam (701) via a coupling.

2. A powder screening device for preparing NdFeB magnetic particles according to claim 1, characterized in that: The second support block (601), the second spring (602) and the screening plate (603) are provided in two groups, which are arranged in an upper and lower position respectively. A screening opening is provided on the left side of the screening plate (603).

3. A powder screening device for preparing NdFeB magnetic particles according to claim 1, characterized in that: The mesh holes of the upper sieve plate (603) are larger than the mesh holes of the lower sieve plate (603).

4. A powder screening device for preparing NdFeB magnetic particles according to claim 1, characterized in that: The anti-blocking mechanism comprises a damping rod (202), a spring three (203), a vibration plate (204) and a vibration motor (205); the damping rod (202) is connected to the bottom of the feed bin (2) on all sides; the spring three (203) is arranged on the outside of the damping rod (202); the vibration plate (204) is fixedly connected to the bottom of the damping rod (202) on all sides; and the output end of the vibration motor (205) is connected to the middle part below the vibration plate (204).

5. The powder screening device for preparing NdFeB magnetic particles according to claim 1, characterized in that: The front of the screening box (1) is hingedly connected to a box door (101), and the front of the box door (101) is fixedly connected to a handle (102).

6. A powder screening device for preparing NdFeB magnetic particles according to claim 1, characterized in that: The back of the screening box (1) is fixedly connected to a dust box (4), the lower part of the dust box (4) is fixedly connected to an air suction pump (404), both sides of the inner wall of the dust box (4) are fixedly connected to support blocks 1 (402), the upper surface of the support block 1 (402) is connected to a filter screen (403), and the top of the dust box (4) is fixedly connected to a dust pipe (401).

7. A powder screening device for preparing NdFeB magnetic particles according to claim 1, characterized in that: The back side of the screening box (1) is fixedly connected to a second cylinder (801), and the output end of the second cylinder (801) is connected to a push plate (802).

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