Silicone oil layer coating equipment

By designing silicone oil coating equipment, using hydraulic rods and suction cups to adjust the nozzle position, and combining immersion box cleaning and vibration motor flushing, the problems of nozzle clogging and uneven spraying were solved, and automated silicone oil application and adsorption were achieved, improving the fabric processing effect.

CN223417523UActive Publication Date: 2025-10-10ZHEJIANG HAPPY CHEM
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Patent Information

Application Number
CN202422859308.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-22
Publication Date
2025-10-10
Estimated Expiration
2034-11-22

AI Technical Summary

Technical Problem

The existing device lacks a soaking and flushing device for the nozzle and the oil plate, which makes the nozzle easy to clog and cannot evenly spray and absorb excess silicone oil, affecting the fabric processing quality.

Method used

A silicone oil coating equipment was designed, which included components such as a hydraulic rod, a hydraulic pump, an oil storage tank, a discharge pump, a nozzle, a suction cup, an immersion tank and a vibration motor to achieve nozzle position adjustment, fabric rotation, automatic cleaning and uniform silicone oil application.

Benefits of technology

It solves the problem of nozzle clogging, achieves spraying uniformity and automatic adsorption of excess silicone oil, and improves fabric processing efficiency and quality.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model relates to the technical field of fabric coating, and discloses silicone oil layer coating equipment which comprises an equipment main body, a hydraulic rod is inserted into the equipment main body, and a hydraulic pump, a movable plate, an oil storage tank and an oil passing plate are inserted into one side of the hydraulic rod. The device is reasonable in structure, and through the hydraulic pump and the hydraulic rod, the effect that when the whole device needs to be used, the oil storage tank can be conveniently driven to ascend and descend on the upper surface of the device body to adjust the position of a spray head is achieved; the problem that a silicone oil layer cannot be uniformly and effectively sprayed on the fabric due to the improper height of a spray head is reduced, and through a discharging pump and a discharging pipe, the effect that silicone oil in an oil storage tank can be quickly taken out and uniformly sprayed on the surface of the fabric through an oil passing plate for use is greatly facilitated; and the problem that due to the fact that silicone oil in the oil storage tank cannot be conveniently taken out and cannot be evenly sprayed to the surface of the fabric, the sprayed fabric is not evenly sprayed is solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of fabric coating, in particular to silicone oil layer coating equipment. Background Art

[0002] Coating fabric with silicone oil is a common method for treating clothing fabrics. It can enhance the softness of the fabric, make it anti-static, waterproof and oil-proof, and protect the fabric. It plays an important role in clothing processing and design.

[0003] However, the existing device lacks a device that can soak and rinse the oil plate and the nozzle when the whole equipment is not in use. It is very easy for the silicone oil to adhere to the inside of the nozzle after long-term use, which is inconvenient to clean, and the nozzle is blocked and inconvenient to use again. At the same time, it also lacks a device that can easily spread the silicone oil evenly on the surface of the fabric and absorb the excess silicone oil after spraying it on the surface of the fabric. It is very easy for the silicone oil to not be sprayed evenly on the surface of the fabric, resulting in the staff having to spread it evenly by themselves later, and the fabric cannot be quickly and naturally dried due to the excessive amount of silicone oil sprayed. Therefore, we propose a new device to solve the above problems. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides a silicone oil layer coating equipment, which solves the problem that the existing device cannot soak and rinse the nozzle and the oil plate, and also solves the problem that it is not convenient to re-apply silicone oil on the surface of the fabric and to adhere to excess silicone oil.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a silicone oil layer coating equipment, comprising an equipment main body, a hydraulic rod is inserted in the interior of the equipment main body, a hydraulic pump is inserted on one side of the hydraulic rod, the equipment main body is slidably connected to the movable plate on the upper surface of the movable plate, an oil storage tank is inserted in the interior of the oil storage tank, one end of the discharge pump is inserted in the discharge pipe, one end of the discharge pipe is inserted in the oil passing plate, and a nozzle is inserted in the lower surface of the oil passing plate. A suction cup is rotatably connected to the interior of the equipment main body, the upper surface of the suction cup is provided with a placing plate, a return spring is inserted in the placing plate, one end of the return spring is inserted in the splint, an immersion box is inserted in the interior of the equipment main body, a vibration motor is inserted in the interior of the equipment main body, one end of the vibration motor is inserted in the vibration module, one end of the vibration module is inserted in the vibration plate, and the lower surface of the equipment main body is inserted in the water tank.

[0008] Optionally, a leg structure is provided on the lower surface of the device body, and the number of the leg structures is four, which are distributed at the four corners of the lower surface of the device body, and the lower surface of the leg structure is provided with a rubber anti-slip pad.

[0009] Optionally, a water pump is plugged into the interior of the water tank, a water pipe is plugged into one end of the water pump, and the interior of the water pipe is in a threaded tubular shape, which can increase the water flow rate.

[0010] Optionally, a fixing bracket is plugged into the upper surface of the device body, and the upper surface of the fixing bracket is trapezoidal.

[0011] Optionally, a slide plate is inserted into the interior of the fixed frame, a motor seat structure is provided on one side of the interior of the slide plate, the other end of the slide plate passes through the fixed frame to support the slide plate parallel to the fixed frame, a screw motor is inserted into the interior of the slide plate, and a screw is inserted into one end of the screw motor.

[0012] Optionally, a slider is slidably connected to the interior of the slide plate, a threaded hole is provided on one side of the slider, a bracket is fixedly connected to the lower surface of the slider, and a protruding docking block structure is provided on the upper surface of the bracket, which can dock with the slider.

[0013] Optionally, an axle seat is inserted into the lower surface of the bracket, and a prototype plug-in hole is opened in the middle position of the upper surface of the axle seat and corresponds to the lower surface of the bracket.

[0014] Optionally, a roller is rotatably connected to the interior of the shaft seat, and the surface of the roller is made of clean cotton cloth.

[0015] In summary, the technical effects and advantages of the utility model are:

[0016] 1. The utility model has a reasonable structure. Through the hydraulic pump and the hydraulic rod, the oil storage tank can be conveniently driven to rise and fall on the upper surface of the equipment body to adjust the position of the nozzle when the overall equipment needs to be used, reducing the problem of not being able to evenly and effectively spray the silicone oil layer on the fabric due to inappropriate height of the nozzle. Through the discharge pump and the discharge pipe, the silicone oil inside the oil storage tank can be quickly taken out and the silicone oil can be evenly sprayed on the surface of the fabric through the oil plate for use, reducing the problem of uneven spraying on the fabric after spraying due to the inconvenience of taking out the silicone oil inside the oil storage tank and the inability to evenly spray the silicone oil on the surface of the fabric.

[0017] 2. In the utility model, the suction cup is used to facilitate the rotation and adjustment of the position of the placement plate, so that the staff can rotate the placement plate conveniently, so that the nozzle can spray the fabric more evenly, reducing the problem that the fabrics are not uniformly sprayed due to the different sizes or shapes of the fabrics and the fabrics cannot be rotated conveniently after being supported on the surface of the placement plate. The reset spring and the clamping plate are used to facilitate the staff to support and fix the fabrics when spraying the fabrics, reducing the problem of fabric deviation when spraying the fabrics due to the inability to fix the fabrics. The immersion box is used to be able to remove the oil when the overall equipment is not used. The plate and the nozzle are placed in the immersion tank for immersion and cleaning, which reduces the problem of nozzle clogging after long-term use, which makes it inconvenient to spray again. Through the vibration motor and the vibration module, the oil-passed plate and the nozzle are immersed. The vibration emitted by the vibration plate makes the water inside the immersion tank shake to flush the inside of the nozzle, which reduces the problem that the silicone oil is in the nozzle for a long time and the nozzle cannot be cleaned by immersion alone. Through the water pump and the water pipe, the immersion tank can be filled with water for immersion and cleaning, which reduces the problem that the staff needs to add water to the immersion tank by themselves due to the inability to automatically fill the immersion tank with water.

[0018] 3. In the utility model, the screw motor and the screw are used to conveniently drive the roller to translate and evenly apply the sprayed fabric again, and to absorb the excessive silicone oil, thereby reducing the problem that the silicone oil on the fabric surface is not evenly applied, resulting in the need for the staff to apply it again by themselves later, and the problem that the silicone oil on the fabric surface cannot be automatically dried due to the inability to absorb the excessive amount of silicone oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the explosion structure of the oil storage tank of the utility model;

[0021] Figure 3 This is a schematic diagram of the explosion structure of the placement plate of the utility model;

[0022] Figure 4 This is a schematic diagram of the explosion structure of the water tank of the utility model;

[0023] Figure 5 This is a schematic diagram of the roller explosion structure of the utility model.

[0024] In the figure: 1. Equipment body; 2. Hydraulic rod; 3. Hydraulic pump; 4. Moving plate; 5. Oil storage tank; 6. Discharge pump; 7. Discharge pipe; 8. Oil plate; 9. Nozzle; 10. Suction cup; 11. Placement plate; 12. Return spring; 13. Clamp; 14. Soaking tank; 15. Vibration motor; 16. Vibration module; 17. Vibration plate; 18. Water tank; 19. Water pump; 20. Water pipe; 21. Fixed frame; 22. Slide plate; 23. Screw motor; 24. Screw; 25. Slider; 26. Bracket; 27. Shaft seat; 28. Roller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example: Reference Figure 1-Figure 5 The silicone oil coating device shown in the figure includes an equipment body 1, a leg structure is provided on the lower surface of the equipment body 1, and the number of the leg structures is four, which are distributed at the four corners of the lower surface of the equipment body 1. The lower surface of the leg structure is provided with a rubber anti-slip pad, a hydraulic rod 2 is plugged into the interior of the equipment body 1, a hydraulic pump 3 is plugged into one side of the hydraulic rod 2, a movable plate 4 is slidably connected to the interior of the equipment body 1, an oil storage tank 5 is plugged into the upper surface of the movable plate 4, a discharge pump 6 is plugged into the interior of the oil storage tank 5, a discharge pipe 7 is plugged into one end of the discharge pump 6, and the discharge pipe 7 is connected to the inner surface of the discharge pipe 7. An oil-passing plate 8 is connected to one end, and a nozzle 9 is connected to the lower surface of the oil-passing plate 8. A suction cup 10 is rotatably connected to the inside of the equipment body 1, and a placement plate 11 is provided on the upper surface of the suction cup 10. A return spring 12 is connected to the inside of the placement plate 11, and a splint 13 is connected to one end of the return spring 12. An immersion box 14 is connected to the inside of the equipment body 1, and a vibration motor 15 is connected to the inside of the equipment body 1. A vibration module 16 is connected to one end of the vibration motor 15, and a vibration plate 17 is connected to one end of the vibration module 16. A water tank 18 is connected to the lower surface of the equipment body 1.

[0027] As a preferred implementation in this embodiment, Figures 1 to 3As shown, the interior of the equipment body 1 is connected with a hydraulic rod 2, one side of the hydraulic rod 2 is connected with a hydraulic pump 3, the interior of the equipment body 1 is slidably connected with a movable plate 4, the upper surface of the movable plate 4 is connected with an oil storage tank 5, the interior of the oil storage tank 5 is connected with a discharge pump 6, one end of the discharge pump 6 is connected with a discharge pipe 7, one end of the discharge pipe 7 is connected with an oil plate 8, the lower surface of the oil plate 8 is connected with a nozzle 9, the interior of the equipment body 1 is rotatably connected with a suction cup 10, the upper surface of the suction cup 10 is provided with a placing plate 11, the interior of the placing plate 11 is connected with a return spring 12, one end of the return spring 12 is connected with a splint 13, the interior of the equipment body 1 is connected with a soaking box 14, and during use, the hydraulic pump 3 and the hydraulic rod 2 can drive the movable plate 4 to move The interior of the equipment body 1 is lifted and lowered, which has the effect of being able to conveniently drive the oil storage tank 5 to be lifted and lowered on the upper surface of the equipment body 1 to adjust the position of the nozzle 9 when the overall equipment needs to be used, reducing the problem of not being able to evenly and effectively spray the silicone oil layer on the fabric due to the inappropriate height of the nozzle 9. Through the discharge pump 6 and the discharge pipe 7, the silicone oil inside the oil storage tank 5 can be sucked out and sprayed into the inside of the oil plate 8, which has the effect of being able to quickly take out the silicone oil inside the oil storage tank 5 and spray the silicone oil evenly on the surface of the fabric for use, reducing the problem of uneven spraying of the fabric after spraying due to the inconvenience of taking out the silicone oil inside the oil storage tank 5 and the inability to evenly spray the silicone oil on the surface of the fabric. The nozzle 9 can spray the silicone oil inside the oil plate 8 onto the surface of the fabric through the nozzle 9, so that it is sprayed evenly. It is worth noting that there are three nozzles 9, which are distributed in sequence on the lower surface of the oil plate 8. The suction cup 10 can be manually driven to rotate, which makes it convenient to rotate and adjust the position of the placement plate 11, so that the staff can rotate the placement plate 11 conveniently, so that the nozzle 9 can spray the fabric more evenly, reducing the problem that the fabrics are not uniformly sprayed due to different sizes or shapes and the fabrics cannot be easily rotated after being supported on the surface of the placement plate 11. The reset spring 12 and the clamping plate 13 can be manually lifted, and the reset spring 1 is released after the clamping plate 13 is released. 2. The return drive drives the splint 13 to descend and clamp the fabric, which makes it convenient for the staff to support and fix the fabric when spraying the fabric, reducing the problem of fabric deviation when spraying the fabric due to the inability to fix the fabric. It is worth noting that there are two return springs 12, which are located on both sides of the lower surface of the splint 13. The middle position of the splint 13 supports the fabric, and the oil plate 8 and the nozzle 9 can be placed in the soaking box 14 for soaking through the soaking box 14, which has the effect of being able to put the oil plate 8 and the nozzle 9 into the soaking box 14 for soaking and cleaning when the overall equipment is not in use, reducing the problem of the nozzle 9 being blocked after long-term use, causing inconvenience in spraying again.

[0028] like Figure 4 and Figure 5 As shown, in this embodiment, a vibration motor 15 is connected to the interior of the device body 1, a vibration module 16 is connected to one end of the vibration motor 15, a vibration plate 17 is connected to one end of the vibration module 16, a water tank 18 is connected to the lower surface of the device body 1, a water pump 19 is connected to the interior of the water tank 18, a water pipe 20 is connected to one end of the water pump 19, the interior of the water pipe 20 is a threaded tube, which can increase the water flow rate, a fixing frame 21 is connected to the upper surface of the device body 1, the upper surface of the fixing frame 21 is trapezoidal, a slide plate 22 is connected to the interior of the fixing frame 21, a motor seat structure is provided on one side of the interior of the slide plate 22, and the other end of the slide plate 22 passes through the fixing frame 21 to connect the slide plate 22 is supported in parallel, a lead screw motor 23 is plugged into the interior of the slide plate 22, and a lead screw 24 is plugged into one end of the lead screw motor 23. A slider 25 is slidably connected to the interior of the slide plate 22, and a threaded hole is provided on one side of the slider 25. A bracket 26 is fixedly connected to the lower surface of the slider 25, and a protruding docking block structure is provided on the upper surface of the bracket 26, which can be docked with the slider 25. A shaft seat 27 is plugged into the lower surface of the bracket 26, and a prototype plugging hole is provided in the middle position of the upper surface of the shaft seat 27, which corresponds to the lower surface of the bracket 26. A roller 28 is rotatably connected to the interior of the shaft seat 27. The surface of the roller 28 is made of clean cotton cloth. During use, the vibration motor 15 and the vibration The dynamic module 16 can drive the vibration plate 17 to vibrate inside the immersion box 14, so that when the oil plate 8 and the nozzle 9 are soaked, the vibration emitted by the vibration plate 17 causes the water inside the immersion box 14 to shake and flush the inside of the nozzle 9, reducing the problem that the silicone oil is in the nozzle 9 for a long time and cannot be cleaned by soaking alone. Through the water pump 19 and the water pipe 20, the water inside the water tank 18 can be sucked out and sprayed into the immersion box 14 to soak the nozzle 9, which makes it convenient to fill the immersion box 14 with water to clean the nozzle 9 and soak it, reducing the need for manual work due to the inability to automatically fill the immersion box 14 with water. In order to solve the problem of workers adding water to the immersion box 14 on their own, the slide plate 22 can be supported by the fixed frame 21, and the slider 25 can be driven to translate inside the slide plate 22 through the screw motor 23 and the screw 24, which can easily drive the roller 28 to translate and evenly apply the sprayed fabric again, and absorb the excessive silicone oil, thereby reducing the problem of the silicone oil on the surface of the fabric not being evenly applied, which requires the staff to apply it again on their own later, and the problem of the silicone oil on the surface of the fabric not being able to be absorbed when there is too much silicone oil, which makes it impossible for the silicone oil to be automatically air-dried. The bracket 26 can support the shaft seat 27 and the roller 28.

[0029] This utility works as follows:

[0030] During use, the hydraulic pump 3 and the hydraulic rod 2 can drive the movable plate 4 to rise and fall inside the equipment body 1, so that when the overall equipment needs to be used, the oil storage tank 5 can be conveniently driven to rise and fall on the upper surface of the equipment body 1 to adjust the position of the nozzle 9, reducing the problem of not being able to evenly and effectively spray the silicone oil layer on the fabric due to the inappropriate height of the nozzle 9. The discharge pump 6 and the discharge pipe 7 can suck out the silicone oil inside the oil storage tank 5 and spray it into the oil plate 8, so that the silicone oil inside the oil storage tank 5 can be quickly taken out and evenly sprayed on the surface of the fabric through the oil plate 8 for use, reducing the problem of not being able to conveniently take out the silicone oil inside the oil storage tank 5 and not being able to evenly spray the silicone oil on the The surface of the fabric causes the problem of uneven spraying on the fabric after spraying. Through the nozzle 9, the silicone oil inside the oil plate 8 can be sprayed on the surface of the fabric through the nozzle 9, so that it is sprayed evenly. Through the suction cup 10, the suction cup 10 can be manually driven to rotate, which makes it convenient to rotate and adjust the position of the placement plate 11, so that the staff can rotate the placement plate 11 conveniently, so that the nozzle 9 can spray the fabric more evenly, reducing the problem that the fabrics are not uniformly sprayed due to different sizes or shapes, and the fabrics cannot be easily rotated after being supported on the surface of the placement plate 11. Through the reset spring 12 and the splint 13, the splint 13 can be manually lifted, and after releasing the reset spring 12, the splint 13 returns to its position and drives the splint 13 down The fabric is clamped, which makes it convenient for the staff to fix the fabric when spraying the fabric, and reduces the problem of fabric deviation when spraying the fabric due to the inability to fix the fabric. The soaking box 14 can be used to put the oil plate 8 and the nozzle 9 into the soaking box 14 for soaking, which has the effect of being able to put the oil plate 8 and the nozzle 9 into the soaking box 14 for soaking and cleaning when the overall equipment is not in use, and reduces the problem of the nozzle 9 being blocked after long-term use, which makes it inconvenient to spray again. The vibration motor 15 and the vibration module 16 can drive the vibration plate 17 to vibrate inside the soaking box 14, which has the effect of being able to soak the oil plate 8 and the nozzle 9 when the vibration plate 17 is soaked. The vibrations emitted cause the water inside the immersion box 14 to shake, thereby flushing the inside of the nozzle 9, reducing the problem that the nozzle 9 cannot be cleaned by soaking alone due to the silicone oil being in the nozzle 9 for a long time. The water inside the water tank 18 can be sucked out by the water pump 19 and the water pipe 20 and sprayed into the immersion box 14 to soak the nozzle 9, thereby facilitating the filling of the immersion box 14 with water for cleaning the nozzle 9 and soaking it, thereby reducing the problem that the staff need to add water to the immersion box 14 by themselves due to the inability to automatically fill the immersion box 14 with water. The fixed frame 21 can support the slide plate 22, and the screw motor 23 and the screw 24 can drive the slider 25 to translate inside the slide plate 22.The bracket 26 can conveniently drive the roller 28 to translate and evenly apply the sprayed fabric again, and absorb the excessive silicone oil, thereby reducing the problem of the staff having to apply the silicone oil again later due to uneven silicone oil application on the fabric surface, and the problem of the silicone oil on the fabric surface not being able to be absorbed and unable to dry automatically. The bracket 26 can support the shaft seat 27 and the roller 28.

[0031] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that performs control such as a computer.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A silicone oil coating device, comprising a device body (1), characterized in that: A hydraulic rod (2) is inserted into the interior of the equipment body (1), a hydraulic pump (3) is inserted into one side of the hydraulic rod (2), a movable plate (4) is slidably connected to the interior of the equipment body (1), an oil storage tank (5) is inserted into the upper surface of the movable plate (4), a discharge pump (6) is inserted into the interior of the oil storage tank (5), a discharge pipe (7) is inserted into one end of the discharge pump (6), an oil plate (8) is inserted into one end of the discharge pipe (7), a nozzle (9) is inserted into the lower surface of the oil plate (8), and a suction cup is rotatably connected to the interior of the equipment body (1). (10), a placement plate (11) is provided on the upper surface of the suction cup (10), a return spring (12) is plugged into the interior of the placement plate (11), one end of the return spring (12) is plugged into a clamping plate (13), a soaking box (14) is plugged into the interior of the device body (1), a vibration motor (15) is plugged into the interior of the device body (1), one end of the vibration motor (15) is plugged into a vibration module (16), one end of the vibration module (16) is plugged into a vibration plate (17), and a water tank (18) is plugged into the lower surface of the device body (1).

2. A silicone oil coating device according to claim 1, characterized in that: The lower surface of the device body (1) is provided with a leg structure, and the number of the leg structures is four, which are distributed at the four corners of the lower surface of the device body (1). The lower surface of the leg structure is provided with a rubber anti-slip pad.

3. The silicone oil coating device according to claim 1, characterized in that: A water pump (19) is plugged into the interior of the water tank (18), and a water pipe (20) is plugged into one end of the water pump (19). The interior of the water pipe (20) is in the shape of a threaded tube, which can increase the water flow rate.

4. The silicone oil coating device according to claim 1, characterized in that: A fixing frame (21) is plugged into the upper surface of the device body (1), and the upper surface of the fixing frame (21) is trapezoidal.

5. The silicone oil coating device according to claim 4, characterized in that: A slide plate (22) is inserted into the interior of the fixed frame (21), a motor seat structure is provided on one side of the interior of the slide plate (22), the other end of the slide plate (22) passes through the fixed frame (21) to support the slide plate (22) in parallel, a screw motor (23) is inserted into the interior of the slide plate (22), and a screw (24) is inserted into one end of the screw motor (23).

6. The silicone oil coating device according to claim 5, characterized in that: The interior of the slide plate (22) is slidably connected to a slider (25), one side of the slider (25) is provided with a threaded hole, the lower surface of the slider (25) is fixedly connected to a bracket (26), and the upper surface of the bracket (26) is provided with a protruding docking block structure capable of docking with the slider (25).

7. The silicone oil coating device according to claim 6, characterized in that: The lower surface of the bracket (26) is plugged with an axle seat (27), and a prototype plug hole is opened in the middle position of the upper surface of the axle seat (27) and corresponds to the lower surface of the bracket (26).

8. The silicone oil coating device according to claim 7, characterized in that: The shaft seat (27) is internally rotatably connected to a roller (28), and the surface of the roller (28) is made of a clean cotton cloth.