Screening device and chamfering machining system

Abstract

The embodiment of the utility model relates to the technical field of capacitors, and particularly discloses a screening device and a chamfering system, a feeding mechanism of the screening device is used for containing and outputting samples and carrying out primary impurity separation on the samples, one end of the screening mechanism is connected with the feeding mechanism and carries out secondary impurity separation on the samples, and the other end of the screening mechanism is connected with the discharging mechanism. The screening mechanism comprises a screen, a first vibrator and a material distributing disc, the screen is arranged on the material distributing disc and used for separating impurities in samples, one end of the material distributing disc is connected with the feeding mechanism and used for guiding out the impurities and the samples separated by the screen, and the first vibrator is arranged on the bottom face of the material distributing disc and used for driving the material distributing disc and the screen to vibrate; one end of the conveying mechanism is connected with the other end of the screening mechanism, the conveying mechanism is used for conveying the samples subjected to secondary impurity separation, one end of the material receiving mechanism corresponds to the other end of the conveying mechanism, and the material receiving mechanism is used for receiving the samples. And due to the automatic screening process, the screening efficiency is effectively improved, and impurity residues are reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of capacitors, and in particular to a screening device and a chamfering processing system. Background Art

[0002] MLCC (Multilayer Ceramic Capacitor) is a basic component widely used in the electronics industry. It plays an important role in various electronic products due to its advantages such as small size, large capacity and good stability. In the manufacturing process of MLCC, the product needs to be chamfered. Usually, the product and abrasive powder are placed in a chamfering machine, and the outer edge of the product is rounded by abrasive powder and the end face is exposed to the inner electrode. Abrasive powder does not react chemically with the product, and abrasive powder generally includes high-hardness mineral or synthetic material components, which is relatively expensive, so the reuse of abrasive powder becomes particularly important. At present, the recycling and reuse of abrasive powder is mainly done by manually operating a sieve to separate impurities.

[0003] In the process of implementing the embodiments of the present application, the inventors found that the manual screening and separation of impurities in the grinding powder would result in a large amount of impurities remaining and an unstable separation effect, thereby affecting the quality of the recovered grinding powder. Utility Model Content

[0004] In view of the above problems, the embodiments of the present utility model provide a screening device and a chamfering processing system, which overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a screening device, including a feeding mechanism, a screening mechanism, a conveying mechanism and a receiving mechanism. The feeding mechanism is used to hold and output samples, and to perform a first impurity separation on the samples. One end of the screening mechanism is connected to the feeding mechanism, and the screening mechanism performs a second impurity separation on the samples. The screening mechanism includes a screen, a first vibrator and a material distribution plate. The screen is arranged on the material distribution plate, and the screen is used to separate impurities in the sample. One end of the material distribution plate is connected to the feeding mechanism, and the material distribution plate is used to respectively guide out the impurities and samples separated by the screen. The first vibrator is arranged on the bottom surface of the material distribution plate, and the first vibrator is used to drive the material distribution plate and the screen to vibrate. One end of the conveying mechanism is connected to the other end of the screening mechanism, and the conveying mechanism is used to transport the samples after the second impurity separation. The receiving mechanism, one end of which is arranged corresponding to the other end of the conveying mechanism, is used to receive the samples transported by the conveying mechanism.

[0006] Optionally, the material distribution tray is provided with a groove, an impurity separation channel, a first through hole and a second through hole, the groove is located between one end and the other end of the material distribution tray, the impurity separation channel is located at the other end of the material distribution tray, the first through hole is located on the side wall of the material distribution tray, the first through hole is connected to the impurity separation channel, the second through hole is located on the end surface of the other end of the material distribution tray, the second through hole is connected to the groove, and the screen is arranged at the notch of the groove.

[0007] Optionally, the screening mechanism further includes a storage box, which is communicated with the first through hole and is used to collect impurities separated by the screen.

[0008] Optionally, the screen includes a first surface and a second surface that are arranged opposite to each other, the second surface faces the groove, one end of the first surface is connected to a port for outputting samples of the feeding mechanism, and the other end of the first surface is connected to the impurity separation channel.

[0009] Optionally, along the first direction, a port for outputting samples from the feeding mechanism is located above the first surface, and the first surface is located above the impurity separation channel.

[0010] Optionally, the feeding mechanism includes a feed box, an adsorption component and a feed tray, the feed box is provided with a feed port and a discharge port, one end of the feed tray is arranged corresponding to the discharge port, and the other end of the feed tray is connected to one end of the distribution tray, the adsorption component is arranged in the feed box and located between the feed port and the discharge port, and the adsorption component is used to adsorb impurities in the sample to achieve the first impurity separation.

[0011] Optionally, the conveying mechanism includes a conveying disk, one end of which is connected to the other end of the material distribution disk, and the other end of the conveying disk is arranged corresponding to the material receiving mechanism.

[0012] Optionally, the material receiving mechanism includes a material receiving box, and the material receiving box is arranged at the other end of the conveyor disc.

[0013] Optionally, the screening device further comprises a control mechanism, wherein the control mechanism is electrically connected to the first vibrator, and the control mechanism is used to control a switch of the first vibrator.

[0014] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a chamfering processing system, including the screening device as described above.

[0015] The beneficial effect of the embodiment of the utility model is as follows: Different from the prior art, the embodiment of the present application provides a screening device and a chamfering processing system, the screening device includes a feeding mechanism, a screening mechanism, a conveying mechanism and a receiving mechanism, the feeding mechanism is used to hold and output samples and perform the first impurity separation on the samples, one end of the screening mechanism is connected to the feeding mechanism, the screening mechanism performs the second impurity separation on the samples, the screening mechanism includes a screen, a first vibrator and a material distribution plate, the screen is arranged on the material distribution plate, the screen is used to separate impurities in the sample, one end of the material distribution plate is connected to the feeding mechanism, the material distribution plate is used to respectively export the impurities and samples separated by the screen, the first vibrator is arranged on the bottom surface of the material distribution plate, the first vibrator is used to drive the material distribution plate and the screen to vibrate, one end of the conveying mechanism is connected to the other end of the screening mechanism, the conveying mechanism is used to transport the samples after the second impurity separation, one end of the receiving mechanism is correspondingly arranged with the other end of the conveying mechanism, and the receiving mechanism is used to receive the samples transmitted by the conveying mechanism. Through the above method, the automated screening process effectively improves the screening efficiency and reduces the impurity residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0017] Figure 1 is a stereogram of a screening device provided by an embodiment of the utility model;

[0018] Figure 2 It is a component disassembly diagram of the screening device provided in the embodiment of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of an operating table provided by an embodiment of the utility model;

[0020] Figure 4 It is an exploded and enlarged view of the feeding mechanism provided in the embodiment of the utility model;

[0021] Figure 5 yes Figure 1 Sectional view after cutting along the section line AA;

[0022] Figure 6 It is an exploded and enlarged view of the screening mechanism provided by the embodiment of the utility model;

[0023] Figure 7 It is a three-dimensional enlarged view of the material distribution tray provided in the embodiment of the utility model;

[0024] Figure 8 It is an exploded and enlarged view of the transmission mechanism provided by the embodiment of the utility model;

[0025] Fig. 9 It is an exploded and enlarged view of the material receiving mechanism provided in the embodiment of the utility model;

[0026] Fig.10 It is a three-dimensional enlarged view of the control mechanism provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0029] See also Figure 1 and Figure 2 The screening device 100 includes an operating table 1, a feeding mechanism 2, a screening mechanism 3, a conveying mechanism 4, a receiving mechanism 5 and a control mechanism 6. The feeding mechanism 2, the screening mechanism 3, the conveying mechanism 4, the receiving mechanism 5 and the control mechanism 6 are all arranged on the operating table 1. The feeding mechanism 2 is connected to one end of the screening mechanism 3, the other end of the screening mechanism 3 is connected to one end of the conveying mechanism 4, the other end of the conveying mechanism 4 is arranged correspondingly to the receiving mechanism 5, and the control mechanism 6 is electrically connected to the feeding mechanism 2, the screening mechanism 3, the conveying mechanism 4 and the receiving mechanism 5 respectively. The feeding mechanism 2 is used to hold the sample and perform the first impurity separation on the sample, the screening mechanism 3 is used to perform the second impurity separation on the sample, the conveying mechanism 4 is used to transport the sample after the second impurity separation, the receiving mechanism 5 is used to receive the sample transported by the conveying mechanism 4, and the control mechanism 6 is used to control the operation of the feeding mechanism 2, the screening mechanism 3, the conveying mechanism 4 and the receiving mechanism 5.

[0030] It is understood that the sample may be the grinding powder used for chamfering the product during the manufacturing process of the multilayer ceramic capacitor, and the particle diameter of the grinding powder is generally in the micron range, specifically, the particle diameter range may be 0.05 micron to 100 micron. The impurities in the sample refer to the debris or particles generated by the grinding of the product during the chamfering process, which will fall from the surface of the product and be mixed into the grinding powder, and the particle diameter of the impurities is larger than the particle diameter of the grinding powder.

[0031] For the above mentioned operation station 1, see Figure 3 The operating table 1 includes a tabletop 11, a bottom plate 12, a connecting column 13 and a supporting column 14. The tabletop 11 and the bottom plate 12 are arranged in parallel along a first direction x. One end of the connecting column 13 is connected to the tabletop 11, and the other end of the connecting column 13 is connected to the bottom plate 12. One end of the supporting column 14 is arranged on the lower surface of the bottom plate 12, and one end of the supporting column 14 is arranged on the bottom surface. A first notch 110 is arranged at one end of the tabletop 11, and a second notch 120 is arranged at one end of the bottom plate 12. The first notch 110 and the second notch 120 are arranged correspondingly along the first direction x. Among them, the first direction x is the height direction of the operating table 1.

[0032] For the above feed mechanism 2, see Figure 4 and Figure 5The feeding mechanism 2 includes a feeding box 21, an adsorption assembly 22, a feeding tray 23, a second vibrator 24 and a first bracket 25. The adsorption assembly 22 is arranged in the feeding box 21, one end of the feeding box 21 is connected to one end of the feeding tray 23, the second vibrator 24 is arranged on the outer side of the bottom surface of the feeding tray 23, the feeding box 21 and the second vibrator 24 are both arranged at one end of the first bracket 25, and the other end of the first bracket 25 is arranged on the table 11. The feeding box 21 is provided with a feeding port and a discharging port, the discharging port is located at one end of the feeding box 21, and the bottom surface of the feeding box 21 is inclined, and the distance between the bottom surface of the feeding box 21 and the surface of the table 11 gradually decreases along the direction from the other end to the one end of the feeding box 21. One end of the feed tray 23 is arranged corresponding to the discharge port, and the projection of one end of the feed tray 23 in the opposite direction of the first direction x overlaps with the discharge port. The other end of the feed tray 23 is connected to the screening mechanism 3, and the sample is output to the screening mechanism 3 from the port at the other end of the feed tray 23. The adsorption component 22 is located between the feed port and the discharge port of the feed box 21, and the adsorption component 22 is used to adsorb impurities in the sample to achieve the first impurity separation. Specifically, the adsorption component 22 includes a plurality of first magnetic bars 221 and a plurality of second magnetic bars 222, and the plurality of first magnetic bars 221 and the plurality of second magnetic bars 222 are evenly spaced along the second direction y, and along the first direction x, the distance between the first magnetic bar 221 and the surface of the platen 11 is greater than the distance between the second magnetic bar 222 and the surface of the platen 11. When the sample enters the feed box 21 from the feed port, the sample will pass through the first magnetic rod 221 and the second magnetic rod 222 in sequence and then flow out from the discharge port, and the magnetic impurities in the sample will be adsorbed on the first magnetic rod 221 and the second magnetic rod 222, thereby achieving the first impurity separation. The second direction y is the length direction of the operating table 1, and the second direction y is perpendicular to the first direction x.

[0033] It can be understood that the structure of the adsorption component 22 is not limited to the above-mentioned structure, and can also be other structures. For example, the adsorption component 22 can also include a larger number of magnetic rods, and the multiple magnetic rods are in a layered structure of three layers or more. The distance between the layers, the distance between the magnetic rods between the layers, and the magnetic strength of the magnetic rods can all be adjusted to achieve efficient adsorption of impurities of different sizes and magnetic properties.

[0034] For screening agency 3 above, see Figure 6 and Figure 7The screening mechanism 3 includes a material distribution tray 32, a first vibrator 33, a screen 31 and a second bracket 34. One end of the material distribution tray 32 is connected to the other end of the feed tray 23, and the other end of the material distribution tray 32 is connected to the conveying mechanism 4. The screen 31 is arranged on the material distribution tray 32, and the first vibrator 33 is arranged on the outer side of the bottom surface of the material distribution tray 32. The first vibrator 33 is used to drive the screen 31 to vibrate to separate impurities in the sample to achieve a second impurity separation. The first vibrator 33 is arranged at one end of the second bracket 34, and the other end of the second bracket 34 is arranged on the table 11. The screen 31 is used to separate impurities in the sample. The screen 31 is provided with evenly distributed meshes, and the diameter of the meshes is larger than the particle diameter of the sample and smaller than the particle diameter of the impurities. The material distribution tray 32 is used to respectively guide out the sample and impurities separated by the screen 31. One end of the material distribution plate 32 is located below the other end of the feed tray 23. The material distribution plate 32 is provided with a groove 320, and the groove 320 is located between one end and the other end of the material distribution plate 32. The other end of the material distribution plate 32 is provided with an impurity separation channel 321, a first through hole 322, and a second through hole 323. The impurity separation channel 321 is located on the upper surface of the material distribution plate 32, the first through hole 322 is located on the side wall of the material distribution plate 32, the first through hole 322 is communicated with the impurity separation channel 321, the second through hole 323 is located on the end surface of the other end of the material distribution plate 32, and the second through hole 323 is communicated with the groove 320. The screen 31 is provided at the notch of the groove 320, and the screen 31 includes a first surface and a second surface arranged opposite to each other, the second surface faces the inside of the groove 320, one end of the first surface is connected to the port at the other end of the feed tray 23, and the other end of the first surface is connected to the impurity separation channel 321.

[0035] Furthermore, along the first direction x, the port for outputting samples from the feed tray 23 is located above the first surface, and the first surface is located above the surface for transporting impurities through the impurity separation channel 321, so that the feed tray 23, the screen 31 and the impurity separation channel 321 form a stepped structure, which facilitates the sample to slide from the feed tray 23 to the screen 31, and the impurities to slide from the screen 31 to the impurity separation channel 321.

[0036] It should be noted that, during the second impurity separation process of the screening mechanism 3, when the sample is transferred from the feed tray 23 to the screening mechanism 3, the sample falls onto the first surface of the screen 31, and the first vibrator 33 drives the material distribution tray 32 and the screen 31 to vibrate at a high frequency and a small amplitude, so that the sample is evenly distributed on the screen 31 and enters the groove 320 after passing through the mesh of the screen 31, and then flows out through the second through hole 323. However, the particle diameter of the impurity is larger than the mesh diameter and cannot pass through the mesh. As the vibration continues, the impurity gradually moves to the impurity separation channel 321 and finally flows out through the first through hole 322.

[0037] In some embodiments, the screening mechanism 3 is further provided with a receiving box 35 , which is used to collect impurities separated by the screening mechanism 3 , and the receiving box 35 is extended with a pipe (not shown) communicating with the first through hole 322 .

[0038] For the above-mentioned transmission mechanism 4, see Figure 8 The conveying mechanism 4 includes a conveying disk 41, a third vibrator 42 and a third bracket 43. One end of the conveying disk 41 is connected to the other end of the dividing disk 32, and one end of the conveying disk 41 is located below the other end of the dividing disk 32. The conveying disk 41 is tilted, and the distance between one end of the conveying disk 41 and the surface of the table 11 is greater than the distance between the other end of the conveying disk 41 and the surface of the table 11. The third vibrator 42 is arranged on the outer side of the bottom surface of the conveying disk 41, the third vibrator 42 is arranged at one end of the third bracket 43, and the other end of the third bracket 43 is arranged on the table 11. The conveyor disk 41 includes a linear portion 411 and an arcuate portion 412. The linear portion 411 is arranged at one end of the conveyor disk 41, and the arcuate portion 412 is arranged at the other end of the conveyor disk 41. Along the direction from one end to the other end of the conveyor disk 41, the bottom width of the linear portion 411 remains consistent, and the bottom width of the arcuate portion 412 gradually decreases, so that the sample can smoothly transition from the linear portion 411 to the arcuate portion 412 in the conveyor disk 41. Moreover, due to the gradual decrease in the bottom width of the arcuate portion 412, the natural gathering of the sample is achieved, further improving the accuracy of the conveyance.

[0039] For the above-mentioned material receiving mechanism 5, please refer to Fig. 9 The material receiving mechanism 5 is arranged at the first notch 110 and the second notch 120 of the operating table 1. The material receiving mechanism 5 includes a material receiving box 51, a weight sensor 52 and a fourth bracket 53. The material receiving box 51 is arranged corresponding to the other end of the conveying disk 41. The weight sensor 52 is arranged on the bottom surface of the material receiving box 51. The weight sensor 52 is used to measure the weight of the sample in the material receiving box 51 and send the weight data to the control mechanism 6. The weight sensor 52 is arranged at one end of the fourth bracket 53, and the other end of the fourth bracket 53 is arranged on the ground.

[0040] For the above control mechanism 6, see Fig.10The control mechanism 6 includes a controller 61 and a signal light 62. The controller 61 is electrically connected to the first vibrator 33, the second vibrator 24, the third vibrator 42, the weight sensor 52 and the signal light 62 respectively. The controller 61 is used to receive and process the signals sent by each component, and control the working state of each component according to the processing results, including controlling the switch of the first vibrator 33, the second vibrator 24 and the third vibrator 42. The signal light 62 is a three-color light that can display three colors: red, yellow and green. When the components of the screening device 100 are started and run normally, the signal light 62 displays green; when any component of the screening device 100 is abnormal, such as the vibrator stops, the weight sensor 52 fails, etc., the signal light 62 displays yellow; when the screening device 100 stops running, the signal light 62 displays red.

[0041] When the sample to be screened enters the feed box 21 from the feed port, the sample passes through the first magnetic rod 221 and the second magnetic rod 222 in sequence, and the magnetic impurities are adsorbed by the first magnetic rod 221 and the second magnetic rod 222, thereby achieving the first impurity separation. After the first impurity separation, the sample flows out from the discharge port of the feed box 21 and falls into the feed tray 23. The second vibrator 24 drives the feed tray 23 to vibrate to transfer the sample to the screening mechanism 3. At this time, the sample falls onto the first surface of the screen 31, and the first vibrator 33 drives the distribution tray 32 and the screen 31 to vibrate at a high frequency and a small amplitude, so that the sample is evenly distributed on the screen 31 and falls into the groove 320 through the mesh of the screen 31, and then flows out through the second through hole 323, while the impurities cannot pass because the particle diameter is larger than the mesh diameter. As the vibration continues, the impurities will gradually move to the impurity separation channel 321, and finally flow out through the first through hole 322 and be collected by the storage box 35. After the second impurity separation, the sample will flow out from the second through hole 323 and fall into the conveyor plate 41. The third vibrator 42 drives the conveyor plate 41 to vibrate to smoothly convey the sample from the linear portion 411 to the arc portion 412 and realize the natural gathering of the sample. When the sample reaches the other end of the conveyor plate 41, it will fall into the receiving box 51.

[0042] When the sample enters the receiving box 51, the weight sensor 52 measures the weight of the sample in real time and transmits the data to the controller 61. The controller 61 determines whether the weight of the sample reaches the preset weight. When the weight of the sample reaches the preset weight, the controller 61 controls the first vibrator 33, the second vibrator 24 and the third vibrator 42 to stop vibrating, and controls the signal light 62 to display red, indicating that the screening device 100 has completed a batch of screening work and is waiting for the operator to take out the sample in the receiving box 51. When the operator takes out the sample, the controller 61 controls the signal light 62 to return to green, indicating that the screening device 100 is ready for the next batch of screening work. In addition, if any abnormal situation occurs during the screening process, such as vibrator failure, sensor failure or blockage of a component of the screening mechanism, the controller 61 will immediately receive the corresponding error signal and control the signal light 62 to display yellow to remind the operator to deal with it in time.

[0043] In the embodiment of the utility model, the screening device 100 includes an operating table 1, a feeding mechanism 2, a screening mechanism 3, a conveying mechanism 4, a receiving mechanism 5 and a control mechanism 6. The feeding mechanism 2, the screening mechanism 3, the conveying mechanism 4, the receiving mechanism 5 and the control mechanism 6 are all arranged on the operating table 1. The feeding mechanism 2 is connected to one end of the screening mechanism 3, the other end of the screening mechanism 3 is connected to one end of the conveying mechanism 4, the other end of the conveying mechanism 4 is arranged correspondingly to the receiving mechanism 5, and the control mechanism 6 is electrically connected to the feeding mechanism 2, the screening mechanism 3, the conveying mechanism 4 and the receiving mechanism 5 respectively. The feeding mechanism 2 is used to hold the sample and perform the first impurity separation on the sample, the screening mechanism 3 is used to perform the second impurity separation on the sample, the conveying mechanism 4 is used to transport the sample after the second impurity separation, the receiving mechanism 5 is used to receive the sample transported by the conveying mechanism 4, and the control mechanism 6 is used to control the feeding mechanism 2, the screening mechanism 3 and the conveying mechanism 4 to stop working when the sample received by the receiving mechanism 5 reaches a preset weight. In the above manner, the automated screening device 100 effectively improves the screening efficiency and impurity separation capacity, and ensures the quality stability of the sample.

[0044] The utility model also provides an embodiment of a chamfering processing system, and the chamfering processing system includes the above-mentioned screening device 100. The structure and function of the screening device 100 can be referred to the above-mentioned embodiment, and will not be described in detail here.

[0045] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. A screening device, characterized in that: include A feeding mechanism, used for holding and outputting samples and performing a first impurity separation on the samples; A screening mechanism, one end of which is connected to the feeding mechanism, the screening mechanism performs a second impurity separation on the sample, the screening mechanism comprises a screen, a first vibrator and a material distribution plate, the screen is arranged on the material distribution plate, the screen is used to separate impurities in the sample, one end of the material distribution plate is connected to the feeding mechanism, the material distribution plate is used to respectively guide out the impurities and samples separated by the screen, the first vibrator is arranged on the bottom surface of the material distribution plate, the first vibrator is used to drive the material distribution plate and the screen to vibrate; A conveying mechanism, one end of which is connected to the other end of the material distribution plate, and the conveying mechanism is used to transport the sample after the second impurity separation; A material receiving mechanism, one end of which is arranged corresponding to the other end of the conveying mechanism, and the material receiving mechanism is used to receive the samples transported by the conveying mechanism.

2. The screening device according to claim 1, characterized in that: The material distribution tray is provided with a groove, an impurity separation channel, a first through hole and a second through hole, the groove is located between one end and the other end of the material distribution tray, the impurity separation channel is located at the other end of the material distribution tray, the first through hole is located on the side wall of the material distribution tray, the first through hole is communicated with the impurity separation channel, the second through hole is located on the end surface of the other end of the material distribution tray, and the second through hole is communicated with the groove; The screen is arranged at the notch of the groove.

3. The screening device according to claim 2, characterized in that: The screening mechanism further comprises a storage box, which is communicated with the first through hole and is used for collecting impurities separated by the screen.

4. The screening device according to claim 3, characterized in that: The screen includes a first surface and a second surface that are arranged opposite to each other, the second surface faces the inside of the groove, one end of the first surface is connected to a port for outputting samples of the feeding mechanism, and the other end of the first surface is connected to the impurity separation channel.

5. The screening device according to claim 4, characterized in that: Along the first direction, a port for outputting samples from the feeding mechanism is located above the first surface, and the first surface is located above the impurity separation channel.

6. The screening device according to claim 1, characterized in that: The feeding mechanism includes a feeding box, an adsorption component and a feed tray. The feeding box is provided with a feeding port and a discharging port. One end of the feed tray is arranged corresponding to the discharging port, and the other end of the feed tray is connected to one end of the distribution tray. The adsorption component is arranged in the feeding box and is located between the feeding port and the discharging port. The adsorption component is used for adsorbing impurities in the sample to realize the first impurity separation.

7. The screening device according to claim 6, characterized in that , The conveying mechanism comprises a conveying disc, one end of which is connected to the other end of the material distribution disc, and the other end of which is arranged corresponding to the material receiving mechanism.

8. The screening device according to claim 7, characterized in that: The material receiving mechanism comprises a material receiving box, and the material receiving box is arranged at the other end of the conveying disk.

9. The screening device according to any one of claims 1 to 8, characterized in that: The screening device further includes a control mechanism, which is electrically connected to the first vibrator and is used to control the switch of the first vibrator.

10. A chamfering system, characterized in that: Comprising a screening device as claimed in any one of claims 1 to 9.

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