Electrostatically coated leather finishing device
By combining the feeding roller, spray gun assembly, and high-voltage electrostatic field assembly, the problem of uneven coating caused by uneven contact force on the coating roller is solved, realizing the uniformity of leather coating and the efficient utilization of coating materials, thereby improving coating quality and drying efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN YUEQING SHOE MATERIAL CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-16
AI Technical Summary
When applying coatings to leather, existing coating equipment makes it difficult to maintain a constant force between the coating roller and the leather, resulting in inconsistent coating thickness on the leather surface, reduced coating quality, and waste of coatings.
The system employs a feeding roller, motor, gears, spray gun assembly, and high-voltage electrostatic field assembly. The feeding roller transports the leather, and the spray gun assembly sprays the coating onto the high-voltage electrostatic field assembly, causing the coating to become charged and evenly deposited on the leather surface under the action of the electric field force. Dust is removed by a dust suction plate, exhaust fan, and dust filter box, while an electric heater and fan in the drying chamber accelerate the drying process.
It achieves uniform coating on leather surfaces and efficient use of paint, improves coating quality, reduces paint waste, and enhances drying efficiency.
Smart Images
Figure CN224358634U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of leather finishing technology, specifically to an electrostatic leather finishing device. Background Technology
[0002] Leather finishing, also known as leather finishing, requires finishing of light leathers such as full-grain leather and corrected grain leather in the later stages of processing before they can be used as finished leather. Finishing gives the leather surface various colors, glosses and styles, and also gives the leather a certain degree of water resistance and easy maintenance.
[0003] Chinese Patent Publication No. CN217103931U, authorized on August 2, 2022, discloses a durable cow leather finishing device for uniform coating. The device includes a support frame, a drive motor fixedly connected to one side of the support frame, and a drive shaft fixedly connected to the output shaft of the drive motor via a coupling. The inner wall of the drive shaft has a connecting groove, and the inner wall of the connecting groove has a positioning groove. A mounting block is movably connected to the inner wall of the connecting groove. This durable cow leather finishing device, through its support frame, drive motor, drive shaft, connecting groove, mounting block, first receiving groove, first return spring, movable block, connecting rod, and finishing brush, facilitates the elastic movement of the finishing brush, resulting in a closer fit between the finishing brush and the surface of the cow leather. This improves the coating effect and avoids the phenomenon of uneven coating caused by the elastic expansion and contraction of the cow leather during coating, which would lead to the finishing brush moving away from the leather.
[0004] Existing coating equipment typically uses a coating roller to directly contact the leather surface when coating leather, transferring the coating material from the roller to the leather surface. However, the force exerted on the roller in contact with the leather is difficult to maintain consistently, resulting in inconsistent coating thickness and reduced coating quality. Roller coating also leads to significant paint waste and fails to meet usage requirements. Utility Model Content
[0005] The purpose of this utility model is to provide an electrostatic leather coating device to solve the problems mentioned in the background art. In the existing coating devices, when coating leather, the coating roller is generally used to directly contact the surface of the leather to transfer the coating on the roller to the surface of the leather. However, it is difficult to keep the force between the coating roller and the leather constant, which will result in uneven coating thickness on the leather surface, reduce the quality of leather coating, and cause a lot of coating waste, which cannot meet the needs of use.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a leather finishing device for electrostatic coating, comprising a finishing table, a plurality of feeding rollers rotatably mounted on the top of the finishing table and arranged horizontally at equal intervals, a finishing chamber fixed above the finishing table, a high-voltage electrostatic field component fixed on the top of the finishing chamber, a spray gun component mounted on one side of the finishing chamber and connected through the high-voltage electrostatic field component, a drying chamber fixed above the finishing table and located on one side of the finishing chamber, an electric heater fixedly mounted inside the drying chamber and located above the feeding rollers, a mounting frame fixed above the finishing table, a plurality of nozzles mounted on the top of the mounting frame and arranged horizontally at equal intervals on the top of the mounting frame, the nozzles located above the feeding rollers, and a blower fixed above one end of the mounting frame and connected to the nozzles.
[0007] Preferably, the coating station has a drive cavity inside, a motor is fixed to one side of one end of the coating station, a first gear is provided inside the drive cavity, and the output end of the motor is connected to a first gear. The first gear is fixedly connected to the feed roller. A second gear is provided inside the drive cavity, and the first gear and the second gear are rotatably connected to the coating station. The second gear is located between the two first gears and meshes with the first gear.
[0008] Preferably, dust collection plates are fixed on both sides of the mounting frame, and an exhaust fan and a dust filter box are installed on the top of the mounting frame. The exhaust fan and the dust filter box are connected to the mounting frame by screws, and the dust filter box is connected to the dust collection plates and the exhaust fan.
[0009] Preferably, a receiving hopper is provided below the coating station, and the receiving hopper is connected to the coating station by screws. The receiving hopper is located below the coating chamber, and a transparent window is rotatably installed at the front end of the coating chamber. Two transparent windows are provided.
[0010] Preferably, a fan is fixedly installed on the top of the drying chamber, and the fan is connected to the drying chamber.
[0011] Preferably, a temperature sensor is fixed on one side of the drying chamber, and the temperature sensor is connected to the drying chamber.
[0012] Preferably, shock-absorbing support legs are provided at the bottom of both ends of the coating table, and there are four shock-absorbing support legs, which are connected to the coating table by screws.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. This utility model device is configured with a feeding roller, a motor, a first gear, a second gear, a high-voltage electrostatic field component, a spray gun component, and a receiving hopper. The motor drives the first gear at the front end to rotate. The first gear meshes with the second gear. As the first gear rotates, it synchronously drives all the feeding rollers to rotate. The rotating feeding rollers drive the leather to be conveyed and sent into the coating chamber. The spray gun component sprays the coating into the interior of the high-voltage electrostatic field component. The high-voltage electrostatic field component charges the coating. The charged coating moves directionally along the electric field lines under the action of the electric field force and is uniformly deposited on the surface of the leather to achieve leather coating.
[0015] 2. This utility model device, through the arrangement of a dust-collecting plate, an exhaust fan, a dust filter box, nozzles, and a blower, draws air into the nozzles and sprays it onto the leather to remove dust from the leather surface. The exhaust fan generates suction below the dust-collecting plate, which draws in the surrounding dust and sends it into the dust filter box to filter and collect the dust-laden gas. Removing dust from the leather surface can improve the coating effect.
[0016] 3. This utility model device uses a fan, a temperature sensor, and an electric heater. The electric heater raises the temperature inside the drying chamber, and the coated leather is sent into the drying chamber for drying. The fan sends air into the drying chamber to accelerate the flow of hot air inside the drying chamber, so that the hot air can come into more thorough contact with the leather and improve the drying efficiency. The temperature sensor measures the drying temperature to avoid the drying temperature being too high and affecting the quality of the leather. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 For the present utility model Figure 1 A magnified view of a portion of area A;
[0019] Figure 3 This is a diagram showing the connection relationship between the material conveying roller and the coating table in this utility model;
[0020] Figure 4 This is a cross-sectional view showing the connection between the drying chamber and the coating table of this utility model.
[0021] In the diagram: 1. Coating table; 2. Shock-absorbing support leg; 3. Coating chamber; 4. High-voltage electrostatic field assembly; 5. Spray gun assembly; 6. Transparent window; 7. Collection hopper; 8. Feeding roller; 9. Drying chamber; 10. Fan; 11. Temperature sensor; 12. Motor; 13. Mounting bracket; 14. Dust collection plate; 15. Exhaust fan; 16. Dust filter box; 17. Nozzle; 18. Blower; 19. Drive chamber; 20. First gear; 21. Second gear; 22. Electric heater. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0023] Please see Figure 1-4 This utility model provides an embodiment of an electrostatic leather finishing device, comprising a finishing table 1, a plurality of feeding rollers 8 rotatably mounted on the top of the finishing table 1, the feeding rollers 8 being horizontally and equidistantly arranged, a finishing chamber 3 fixed above the finishing table 1, a high-voltage electrostatic field component 4 fixed on the top of the finishing chamber 3, a spray gun component 5 mounted on one side of the finishing chamber 3, the spray gun component 5 and the high-voltage electrostatic field component 4 being through-connected, a drying chamber 9 fixed above the finishing table 1, the drying chamber 9 being located on one side of the finishing chamber 3, an electric heater 22 fixedly mounted inside the drying chamber 9, the electric heater 22 being located above the feeding rollers 8, and a mounting frame 13 fixed above the finishing table 1, the top of the mounting frame 13 being equipped with a plurality of nozzles 17. The nozzles 17 are horizontally and equidistantly arranged on the top of the mounting frame 13, and are positioned above the feed roller 8. A blower 18 is fixed above one end of the mounting frame 13, and the blower 18 is connected to the nozzles 17. The coating table 1 has a drive chamber 19 inside, and a motor 12 is fixed on one side of one end of the coating table 1. A first gear 20 is arranged inside the drive chamber 19, and the output end of the motor 12 is connected to one of the first gears 20. The first gear 20 is fixedly connected to the feed roller 8. A second gear 21 is arranged inside the drive chamber 19, and the first gear 20 and the second gear 21 are rotatably connected to the coating table 1. The second gear 21 is positioned between the two first gears 20, and the second gear 21 is meshed with the first gear 20.
[0024] In use: Lay the leather flat on the conveying rollers 8, turn on the motor 12 to drive the first gear 20 at the front end to rotate. The first gear 20 meshes with the second gear 21. As the first gear 20 rotates, it synchronously drives all the conveying rollers 8 to rotate. The rotating conveying rollers 8 carry the leather. Turn on the blower 18 to draw air into the nozzle 17, and then spray it onto the leather through the nozzle 17 to remove dust from the leather surface. Send the leather into the coating chamber 3. The spray gun assembly 5 sprays the paint into the interior of the high-voltage electrostatic field assembly 4. The high-voltage electrostatic field assembly 4 makes the paint charged. The charged paint moves directionally along the electric field lines under the action of the electric field force and is evenly deposited on the leather surface to achieve leather coating. The coated leather is sent into the drying chamber 9. Turn on the electric heater 22 to raise the temperature inside the drying chamber 9 and dry the coated leather.
[0025] Please see Figure 1The mounting frame 13 has dust collection plates 14 fixed on both sides. A fan 15 and a dust filter box 16 are installed on the top of the mounting frame 13. The fan 15 and the dust filter box 16 are connected to the mounting frame 13 by screws. The dust filter box 16 is connected to the dust collection plates 14 and the fan 15. When the fan 15 is turned on, it generates suction below the dust collection plates 14. Under the action of suction, the dust scattered around is drawn into the dust filter box 16 for filtration and collection of dust-laden gas.
[0026] Please see Figure 1 The receiving hopper 7 is located below the coating bin 3. A transparent window 6 is rotatably installed at the front end of the coating bin 3. There are two transparent windows 6. The receiving hopper 7 is located below the coating table 1 and is connected to the coating table 1 by screws. The receiving hopper 7 collects and recycles excess paint, thereby improving the paint utilization efficiency.
[0027] Please see Figure 1 and Figure 4 A fan 10 is fixedly installed on the top of the drying chamber 9 and is connected to the drying chamber 9. A temperature sensor 11 is fixed on one side of the drying chamber 9 and is connected to the drying chamber 9. Four shock-absorbing support legs 2 are provided under both ends of the finishing table 1 and are connected to the finishing table 1 by screws. The fan 10 sends air into the drying chamber 9 to accelerate the flow of hot air inside the drying chamber 9, so that the hot air can come into more thorough contact with the leather and improve the drying efficiency of the leather. The temperature sensor 11 measures the drying temperature to avoid the drying temperature being too high and affecting the quality of the leather.
[0028] Working principle: The leather is spread out and laid flat on the conveying rollers 8. The motor 12 is turned on, driving the first gear 20 at the front end to rotate. The first gear 20 meshes with the second gear 21. As the first gear 20 rotates, it synchronously drives all the conveying rollers 8 to rotate. The rotating conveying rollers 8 transport the leather. The blower 18 is turned on to draw air into the nozzle 17, which then sprays it onto the leather to remove dust from the surface. The exhaust fan 15 is turned on to generate suction below the dust collection plate 14. Under the action of suction, the surrounding dust is drawn into the filter. In the dust box 16, the leather is fed into the finishing chamber 3. The spray gun assembly 5 sprays the paint into the interior of the high-voltage electrostatic field assembly 4. The high-voltage electrostatic field assembly 4 charges the paint, and the charged paint moves directionally along the electric field lines under the action of the electric field force, and is evenly deposited on the surface of the leather to achieve leather finishing. The finished leather is sent into the drying chamber 9. The electric heater 22 is turned on to increase the temperature inside the drying chamber 9. The fan 10 sends air into the drying chamber 9 to accelerate the flow of hot air inside the drying chamber 9, so that the hot air can come into more thorough contact with the leather and dry the leather better.
[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.
[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A leather finishing apparatus for electrostatic coating, comprising a coating table (1), characterized in that: Multiple feeding rollers (8) are rotatably mounted on the top of the coating table (1), and the feeding rollers (8) are horizontally and equidistantly arranged. A coating chamber (3) is fixed above the coating table (1), and a high-voltage electrostatic field assembly (4) is fixed on the top of the coating chamber (3). A spray gun assembly (5) is installed on one side of the coating chamber (3), and the spray gun assembly (5) and the high-voltage electrostatic field assembly (4) are connected through each other. A drying chamber (9) is fixed above the coating table (1), and the drying chamber (9) is located on one side of the coating chamber (3). An electric heater (22) is fixedly installed inside the 9), and the electric heater (22) is located above the feed roller (8). A mounting frame (13) is fixed above the coating table (1). Multiple nozzles (17) are installed on the top of the mounting frame (13), and the nozzles (17) are horizontally and equidistantly arranged on the top of the mounting frame (13). The nozzles (17) are located above the feed roller (8). A blower (18) is fixed above one end of the mounting frame (13), and the blower (18) is connected to the nozzles (17).
2. The leather finishing apparatus for electrostatic coating according to claim 1, characterized in that: The coating station (1) is provided with a drive cavity (19). A motor (12) is fixed on one side of one end of the coating station (1). A first gear (20) is provided inside the drive cavity (19). The output end of the motor (12) is connected to a first gear (20). The first gear (20) is fixedly connected to the feed roller (8). A second gear (21) is provided inside the drive cavity (19). The first gear (20) and the second gear (21) are rotatably connected to the coating station (1). The second gear (21) is located between the two first gears (20). The second gear (21) is meshed with the first gear (20).
3. The leather finishing apparatus for electrostatic coating according to claim 1, characterized in that: The mounting bracket (13) has dust collection plates (14) fixed on both sides. A fan (15) and a dust filter box (16) are installed on the top of the mounting bracket (13). The fan (15) and the dust filter box (16) are connected to the mounting bracket (13) by screws. The dust filter box (16) is connected to the dust collection plate (14) and the fan (15).
4. The leather finishing apparatus for electrostatic coating according to claim 1, characterized in that: A receiving hopper (7) is provided below the coating station (1), and the receiving hopper (7) is connected to the coating station (1) by screws. The receiving hopper (7) is located below the coating bin (3). A transparent window (6) is rotatably installed at the front end of the coating bin (3). There are two transparent windows (6).
5. The leather finishing apparatus for electrostatic coating according to claim 1, characterized in that: A fan (10) is fixedly installed on the top of the drying chamber (9), and the fan (10) is connected to the drying chamber (9).
6. The leather finishing apparatus for electrostatic coating according to claim 1, characterized in that: A temperature sensor (11) is fixed on one side of the drying chamber (9), and the temperature sensor (11) is connected to the drying chamber (9).
7. The leather finishing apparatus for electrostatic coating according to claim 1, characterized in that: The coating table (1) is provided with shock-absorbing support legs (2) at both ends. There are four shock-absorbing support legs (2), and the shock-absorbing support legs (2) are connected to the coating table (1) by screws.