Screening device for production of high-performance silicon-based heat conduction material
By using buffer blocks, screens, scrapers, collection hoppers, and material control components in the screening device, the problems of fine screen accumulation and wear are solved, achieving a high-efficiency, low-wear multi-stage screening effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI ZHIMIN THERMAL CONTROL TECH CO LTD
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-14
AI Technical Summary
In the existing technology, fine screens are prone to packing material accumulation during the screening process, which affects screening efficiency. Furthermore, the packing material impacts the screen during feeding, resulting in severe wear and making it difficult to control the material thickness.
A screening device for the production of high-performance silicon-based thermally conductive materials was designed. It uses buffer blocks and mesh plates to reduce the impact force of the filler, uses uniform thickness scrapers to control the filler thickness, and controls the filler quantity through collection hoppers and material control components. It also combines vibrators and purging pipes to achieve multi-stage screening and cleaning.
It improves the service life of the screening belt, ensures screening efficiency, avoids packing accumulation and wear, and realizes a highly efficient multi-stage screening process.
Smart Images
Figure CN224114474U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-performance silicon-based thermal conductive material production technology, specifically a screening device for the production of high-performance silicon-based thermal conductive materials. Background Technology
[0002] High-performance silicon-based thermally conductive materials are a type of thermal interface material made by adding high thermal conductivity fillers (such as alumina, aluminum nitride, and boron nitride) to an organosilicon polymer (such as silicone oil and silicone rubber) as a matrix. During production, the raw materials need to be screened to precisely control the particle size distribution of the fillers. In related technologies, screening devices typically use screens of different mesh sizes to separate the fillers. However, different mesh sizes have different screening efficiencies; coarse screens have higher screening efficiency than fine screens. This leads to a greater accumulation of fillers on fine screens during screening, further reducing their screening efficiency. Furthermore, the fillers impact the screen during feeding, accelerating screen wear and hindering control of material thickness. Therefore, this application proposes a screening device for the production of high-performance silicon-based thermally conductive materials. Utility Model Content
[0003] This invention provides a screening device for the production of high-performance silicon-based thermally conductive materials, which solves the problems mentioned in the background art, such as the accumulation of a large amount of filler on the fine screen during the screening process, which affects the screening efficiency; and the impact of the filler on the screen during feeding, which aggravates the wear of the screen and makes it difficult to control the thickness of the material.
[0004] This utility model provides the following technical solution: a screening device for the production of high-performance silicon-based thermally conductive materials, comprising a device housing, wherein a screening belt for screening the filler material for the production of high-performance silicon-based thermally conductive materials is arranged vertically in the inner cavity of the device housing, a uniform thickness scraper is arranged above the feed end of the screening belt, a material hopper is arranged below the discharge end of the screening belt, a guide pipe is arranged at the discharge end of the material hopper, and the other end of the guide pipe extends to the outside of the device housing; a collecting hopper is arranged between the upper and lower straight sections of the screening belt, a discharge port is arranged at the bottom of the inner cavity of the collecting hopper, a conveying pipe is arranged at the bottom of the discharge port, the discharge end of the conveying pipe extends to the upper feed end of the screening belt below it or to the outside of the device housing, a material control component is arranged at the feed end of the conveying pipe, a striking component is arranged at the bottom of the inner cavity of the collecting hopper, and a purging pipe is arranged at the top of the collecting hopper, the purging pipe contacting the bottom of the upper straight section of the screening belt near the material hopper.
[0005] Preferably, a feed hopper is provided at the top of the inner cavity of the device housing away from the feed pipe, a buffer block is provided below the discharge end of the feed hopper, and a screen is provided at the bottom of the conveying pipe located between two adjacent screening belts.
[0006] Preferably, the material control assembly includes a movable plate, and a receiving groove adapted to the movable plate is provided on one side of the discharge port between two adjacent collection hoppers. The bottom of the receiving groove is provided with a slot, and a push plate is movably connected to the inner cavity of the slot. The push plate is connected to the bottom of the movable plate, and the push plate is connected to the collection hopper through an electric telescopic rod.
[0007] Preferably, the striking assembly includes an electric telescopic rod II connected to the bottom of the inner cavity of the collection hopper and a striking hammer connected to the end of the output shaft of the electric telescopic rod II.
[0008] Preferably, the bottom of the collecting hopper and the bottom of the buffer block cavity are both hollow structures, and a vibrator is provided in both the bottom cavity of the collecting hopper and the inner cavity of the buffer block. The output end of the vibrator is in contact with the top of the bottom cavity of the collecting hopper or the top of the inner cavity of the buffer block.
[0009] Preferably, an air compressor is provided at one end of the device housing, and the air outlet of the air compressor is connected to the inner cavity of the purge pipe through a connecting pipe.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] 1. This high-performance silicon-based thermal conductive material production screening device uses buffer blocks and mesh plates to reduce the impact of the filler on the screening belt, reduce the wear of the screening belt, and improve the service life of the screening belt; it uses a uniform thickness scraper to scrape the filler on the screening belt to ensure the thickness of the filler on the screening belt, and avoid the screening efficiency being affected by excessive local filler thickness, thus ensuring the working efficiency of the device.
[0012] 2. This screening device for the production of high-performance silicon-based thermal conductive materials can control the amount of filler falling onto screening belts two and three by setting up a collection hopper and a material control component. This avoids the problem of filler accumulation on screening belts two and three, ensures the screening efficiency of screening belts two and three, and facilitates the screening of filler for the production of high-performance silicon-based thermal conductive materials using this device. Attached Figure Description
[0013] Figure 1 This is a front view of the structure of Embodiment 1 of this utility model;
[0014] Figure 2 This is a schematic diagram of the back of the structure of Embodiment 1 of this utility model;
[0015] Figure 3 This is a schematic diagram of the internal structure of Embodiment 1 of this utility model;
[0016] Figure 4 The structure of Embodiment 1 of this utility model Figure 3 The diagram on the right;
[0017] Figure 5This is a schematic diagram of the internal structure of the collection hopper of this utility model;
[0018] Figure 6 The structure of this utility model Figure 5 Diagram showing the view from below;
[0019] Figure 7 This is a schematic diagram of the structural vibrator of this utility model.
[0020] In the diagram: 1. Device housing; 2. Feed hopper; 3. Guide pipe; 4. Servo motor; 5. Buffer block; 6. Gathering hopper; 7. Screening belt; 8. Blowing pipe; 9. Conveying pipe; 10. Uniform thickness scraper; 11. Collection hopper; 12. Electric telescopic rod II; 13. Moving plate; 14. Striking hammer; 15. Electric telescopic rod; 16. Grooving; 17. Push plate; 18. Air compressor; 19. Connecting pipe; 20. Discharge port; 21. Synchronous roller; 22. Screen plate; 23. Vibrator. Detailed Implementation
[0021] 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.
[0022] A sieving device for producing high-performance silicon-based thermally conductive materials includes a housing 1. The inner cavity of the housing 1 is vertically arranged with sieving belts 7 for sieving the filler material used in the production of high-performance silicon-based thermally conductive materials. The mesh diameters on adjacent sieving belts 7 are different, with the mesh diameter of the upper sieving belt 7 being larger than that of the lower sieving belt 7. In use, this device can perform multiple sievings of the filler material used in the production of high-performance silicon-based thermally conductive materials. The structure of Embodiment 1 of this application is as follows. Figures 1 to 7 As shown below, Figures 1 to 7 The present application will be described using the structure shown as an example.
[0023] In Embodiment 1, the inner cavity of the device housing 1 is provided with three sets of screening belts 7 and three sets of synchronous roller groups. Each set of synchronous roller groups includes two synchronous rollers 21, which are connected by the screening belts 7. The synchronous rollers 21 in two adjacent sets of synchronous roller groups are connected by a transmission structure, which can be a gear transmission structure, a chain transmission structure, etc., and is not limited here. A servo motor 4 is provided on one side of the device housing 1. The output shaft of the servo motor 4 is connected to a synchronous roller 21 through a reducer. With this configuration, when the servo motor 4 rotates, the three sets of screening belts 7 in Embodiment 1 will all rotate under the action of the transmission structure. The screening belts 7 can transport high-performance silicon-based thermally conductive material production filler, realizing the simultaneous transportation and screening of the filler.
[0024] A uniform thickness scraper 10 is provided above the feed end of the screening belt 7. The distance between the bottom of the uniform thickness scraper 10 and the top of the screening belt 7 can be set according to the requirements and is not limited here. When this application is used, the uniform thickness scraper 10 can control the thickness of the filler on the screening belt 7 to avoid the local filler on the screening belt 7 being too thick and affecting the screening effect. A material hopper 6 is provided below the discharge end of the screening belt 7. A guide pipe 3 is provided at the discharge end of the material hopper 6. The other end of the guide pipe 3 extends to the outside of the device housing 1. The residual filler on the screening belt 7 can be discharged through the material hopper 6 and the guide pipe 3.
[0025] A feed hopper 2 is provided at the top of the inner cavity of the device housing 1, away from the feed pipe 3, and a buffer block 5 is provided below the discharge end of the feed hopper 2.
[0026] A collecting hopper 11 is installed between the upper and lower straight sections of the screening belt 7. A discharge port 20 is located at the bottom of the inner cavity of the collecting hopper 11, and a conveying pipe 9 is installed at the bottom of the discharge port 20. For ease of description, the three conveying pipes 9 are referred to as conveying pipe one, conveying pipe two, and conveying pipe three from top to bottom. The three screening belts 7 are referred to as screening belt one, screening belt two, and screening belt three. The discharge end of conveying pipe one is located above the inlet end of screening belt two, the discharge end of conveying pipe two is located above the inlet end of screening belt three, and the discharge end of conveying pipe three extends to the outside of the device housing 1. The filler material screened by screening belt three can be discharged through conveying pipe three.
[0027] The distances between buffer block 5 and screening belt 1, between the discharge end of conveyor pipe 1 and screening belt 2, and between the discharge end of conveyor pipe 2 and screening belt 3 are the same. Buffer block 5 buffers the packing material, reducing the impact force on screening belt 1 during feeding and thus reducing wear. Both conveyor pipes 1 and 2 have mesh plates 22 at their discharge ends. Mesh plates 22 help to comb the packing material, reducing the impact force on screening belt 7 and further reducing wear. The aperture of mesh plate 22 is larger than that of the packing material; the aperture of mesh plate 22 can be set according to requirements and is not limited here.
[0028] As described above, after the screening belt 7 screens the filler, the filler that passes through the screening belt 7 falls into the collection hopper 11 below the screening belt 7. The collection hopper 11 has the functions of collecting and guiding materials. The filler can move to another screening belt 7 along the discharge port 20 of the collection hopper 11 and the conveying pipe one or the conveying pipe two, which facilitates the re-screening of the filler. The filler intercepted by the screening belt 7 is discharged through the accumulating hopper 6 and the guiding pipe 3. This application realizes multi-stage screening of the filler, and during feeding, the buffer block 5 and the mesh plate 22 are used to reduce the impact force of the filler on the screening belt 7 and reduce the wear of the screening belt 7.
[0029] The feed end of the conveying pipe 9 is equipped with a material control component, which includes a moving plate 13. A receiving groove adapted to the moving plate 13 is provided on one side of the discharge port 20 between two adjacent collection hoppers 11. A slot 16 is provided at the bottom of the receiving groove. A push plate 17 is movably connected to the inner cavity of the slot 16. The push plate 17 is connected to the bottom of the moving plate 13. The push plate 17 is connected to the collection hopper 11 through an electric telescopic rod 15. With the setting of the material control component, the extension and retraction of the electric telescopic rod 15 can change the position of the moving plate 13 through the push plate 17. The moving plate 13 can change the size of the feed end of the conveying pipe 9 and control the filler entering the conveying pipe 9, thereby avoiding the accumulation of filler on the screening belts 2 and 3 and ensuring the working efficiency of the screening belts 2 and 3.
[0030] The bottom of the inner cavity of the collecting hopper 11 is provided with a striking assembly, which includes an electric telescopic rod 12 connected to the bottom of the inner cavity of the collecting hopper 11 and a striking hammer 14 connected to the end of the output shaft of the electric telescopic rod 12. The extension and retraction of the electric telescopic rod 12 can change the position of the striking hammer 14 connected to it. The striking hammer 14 can strike the upper straight section of the screening belt 7, causing the upper straight section of the screening belt 7 to vibrate, which facilitates the screening of the filler.
[0031] The bottom of the collecting hopper 11, the bottom of the inner cavity of the buffer block 5, and the wall of the conveying pipe 9 are all hollow structures. Vibrators 23 are installed in the inner cavity of the bottom of the collecting hopper 11, the inner cavity of the buffer block 5, and the inner wall of the conveying pipe 9. The output end of the vibrator 23 contacts the top of the inner cavity of the bottom of the collecting hopper 11, the top of the inner cavity of the buffer block 5, or the inner wall of the conveying pipe 9. The other end of the vibrator 23 is equipped with a shock-absorbing pad during installation. The vibrator 23 can be a vibration motor in the prior art. The model of the vibration motor can be set according to the requirements and is not limited here. When this application is used, the operation of the vibration motor can cause the bottom of the inner cavity of the collecting hopper 11, the top of the buffer block 5, and the inner wall of the conveying pipe 9 to vibrate, which facilitates the movement of the packing.
[0032] A purge pipe 8 is provided at the top of the collection hopper 11. The purge pipe 8 contacts the bottom of the straight section of the screening belt 7 near the material hopper 6. An air compressor 18 is provided at one end of the device housing 1. The air outlet of the air compressor 18 is connected to the inner cavity of the purge pipe 8 through a connecting pipe 19. In embodiment 1, the air outlet of the air compressor 18 is connected to the connecting pipe 19 through a four-way valve. When the air compressor 18 is working, it can blow compressed air into the purge pipe 8 connected to the connecting pipe 19. Air blowing holes are evenly arranged at the top of the inner cavity of the purge pipe 8. Compressed air is discharged through the air blowing holes. The discharged compressed air can blow out the packing material that blocks the mesh diameter of the screening belt 7, thereby cleaning the screening belt 7. The cleaned packing material can be discharged through the material hopper 6 and the guide pipe 3.
[0033] All electrical components involved in this application are prior art. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies can be connected by wires. According to the actual situation, a suitable controller can be selected to meet the control requirements. For specific connections and control sequences, please refer to the description below. The electrical connection between each electrical component is completed in the order of operation. The detailed connection methods are well known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.
[0034] In summary: When using this screening device for the production of high-performance silicon-based thermally conductive materials, the controller within the device controls the servo motor 4 to operate. The servo motor 4 drives the screening belt 7 to rotate. The electric telescopic rod 12 drives the hammer 14 to strike the screening belt 7, causing it to vibrate. The filler material to be screened for the production of high-performance silicon-based thermally conductive materials can fall onto the screening belt through the feed hopper 2. During the transport of the filler material on the screening belt 7, the uniform thickness scraper 10 scrapes the filler material to control the thickness of the filler material on the screening belt 7. The vibration of the screening belt 7 enables the packing material to be screened. The packing material passing through the screening belt 7 falls into the collection hopper 11. The packing material in the collection hopper 11 enters the conveying pipe 9 through the discharge port 20. The packing material in the first conveying pipe falls onto the second screening belt, allowing the second screening belt to continue screening the packing material. The packing material in the second conveying pipe falls onto the third screening belt, allowing the third screening belt to continue screening the packing material. The packing material in the third conveying pipe and the packing material intercepted by the screening belt 7 are discharged outside the device housing 1, where workers can collect the packing material. During the screening process, workers use a controller to control the operation of the electric telescopic rod 12. The electric telescopic rod 12 drives the moving plate 13 to move through the push plate 17, changing the feeding area at the feeding end of the conveying pipe 9, preventing packing material accumulation on the second and third screening belts, and ensuring the working efficiency of the second and third screening belts.
[0035] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional technical means such as bolt connection that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.
Claims
1. A screening device for producing high-performance silicon-based thermally conductive materials, comprising a device housing (1), characterized in that: The inner cavity of the device housing (1) is vertically provided with a screening belt (7) for screening the filler material used in the production of high-performance silicon-based thermally conductive materials. A uniform-thickness scraper (10) is provided above the feed end of the screening belt (7), and a material-collecting hopper (6) is provided below the discharge end of the screening belt (7). A guide pipe (3) is provided at the discharge end of the material-collecting hopper (6), and the other end of the guide pipe (3) extends to the outside of the device housing (1). A collecting hopper (11) is provided between the upper and lower straight sections of the screening belt (7). 11) A discharge port (20) is provided at the bottom of the inner cavity. A conveying pipe (9) is provided at the bottom of the discharge port (20). The discharge end of the conveying pipe (9) extends to the top of the feed end of the screening belt (7) below it or to the outside of the device housing (1). A material control component is provided at the feed end of the conveying pipe (9). A knocking component is provided at the bottom of the inner cavity of the collecting hopper (11). A purging pipe (8) is provided at the top of the collecting hopper (11). The purging pipe (8) contacts the bottom of the straight section of the screening belt (7) near the end of the material hopper (6).
2. The screening device for producing high-performance silicon-based thermally conductive materials according to claim 1, characterized in that: The device housing (1) has a feeding hopper (2) at the top of the inner cavity away from the feed pipe (3), a buffer block (5) is provided below the discharge end of the feeding hopper (2), and a screen plate (22) is provided at the bottom of the conveying pipe (9) located between two adjacent screening belts (7).
3. The screening device for producing high-performance silicon-based thermally conductive materials according to claim 1, characterized in that: The material control assembly includes a movable plate (13). A receiving groove adapted to the movable plate (13) is provided on one side of the discharge port (20) between two adjacent collection hoppers (11). A slot (16) is provided at the bottom of the receiving groove. A push plate (17) is movably connected to the inner cavity of the slot (16). The push plate (17) is connected to the bottom of the movable plate (13). The push plate (17) is connected to the collection hopper (11) through an electric telescopic rod (15).
4. The screening device for producing high-performance silicon-based thermally conductive materials according to claim 1, characterized in that: The striking assembly includes an electric telescopic rod (12) connected to the bottom of the inner cavity of the collection hopper (11) and a striking hammer (14) connected to the end of the output shaft of the electric telescopic rod (12).
5. A screening device for producing high-performance silicon-based thermally conductive materials according to claim 2, characterized in that: The bottom of the collecting hopper (11) and the bottom of the inner cavity of the buffer block (5) are both hollow structures. The inner cavity of the bottom of the collecting hopper (11) and the inner cavity of the buffer block (5) are both equipped with vibrators (23). The output end of the vibrator (23) is in contact with the top of the inner cavity of the bottom of the collecting hopper (11) or the top of the inner cavity of the buffer block (5).
6. A screening device for producing high-performance silicon-based thermally conductive materials according to claim 1, characterized in that: An air compressor (18) is provided at one end of the housing (1) of the device, and the air outlet of the air compressor (18) is connected to the inner cavity of the purge pipe (8) through a connecting pipe (19).