A table coater

Abstract

This invention discloses a benchtop coating machine, comprising a roll material rack, a material contact conveying mechanism, a spray gap adjustment mechanism, a spraying mechanism, a constant temperature drying chamber, and a uniform airflow valve. The material contact conveying mechanism is located on the side of the roll material rack, and the spraying mechanism is located on the side of the material contact conveying mechanism. The spraying mechanism is fixed to the spray gap adjustment mechanism and equipped with a laser rangefinder. The constant temperature drying chamber is located on the side of the material contact conveying mechanism. The uniform airflow valve, which provides high-speed airflow to the spraying mechanism to increase the liquid discharge speed, is connected to the spraying mechanism via an air pipe. This invention can adapt to sheet materials of different thicknesses and can adjust the spraying thickness as needed, resulting in a more uniform spraying thickness. It can also achieve constant temperature drying of the sprayed material, offering high efficiency and good stability, and can well meet the needs of repeated small-batch manufacturing experiments in the laboratory.

Description

Technical Field

[0001] This invention relates to the technical field of battery panel spraying equipment, and in particular to the technical field of a benchtop coating machine. Background Technology

[0002] In the field of battery research and development, batteries require the stacking or rolling of film materials. The materials used for the plates are metals such as copper. Surface coating of these plates is a crucial process for ensuring product performance—a uniform and controllable coating must be formed on the plate surface to meet high standards for conductivity, resistance, and other core requirements. These plates are thin, prone to wrinkling and deformation, placing stringent demands on the stability of material transport, the accuracy of coating thickness, and drying efficiency during the coating process. During research and development, laboratories need to conduct numerous experiments. Existing coating equipment primarily caters to mass production, and much of the coating work is done manually. Manual work suffers from poor quality, high labor intensity, low efficiency, and low precision in controlling spray gaps and coating thickness. Furthermore, the spacing between the coating and conveying mechanisms in existing equipment is often fixed, making it impossible to adjust flexibly according to plate thickness and coating characteristics. The lack of a real-time thickness detection and feedback mechanism makes it difficult to accurately control coating thickness, leading to localized over- or under-coating, or uneven thicknesses. This fails to meet the consistency requirements of precision machining, ultimately resulting in significant differences in the electrical properties of the finished product and affecting laboratory experimental results. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by proposing a tabletop coating machine that solves the problem of uneven coating thickness in traditional spraying equipment.

[0004] To achieve the above objectives, the present invention proposes a tabletop coating machine, comprising a roll material rack for storing roll material, a material bonding and conveying mechanism, a spraying gap adjustment mechanism, a spraying mechanism, a constant temperature drying chamber, and a uniform material flow valve. The roll material rack has a material bonding and conveying mechanism on its side for bonding, tightening, and conveying the material. The material bonding and conveying mechanism has a spraying mechanism on its side for uniformly spraying liquid material onto the surface of the sheet material. The spraying mechanism is fixed on a spraying gap adjustment mechanism for adjusting the gap between the spraying mechanism and the material bonding and conveying mechanism. The spraying mechanism is equipped with a laser rangefinder for measuring the distance between the spraying mechanism and the material bonding and conveying mechanism. The material bonding and conveying mechanism has a constant temperature drying chamber on its side for drying the sprayed sheet material bonded to the material bonding and conveying mechanism. The spraying mechanism is connected via an air pipe to a uniform material flow valve that provides high-speed airflow to the spraying mechanism to increase the liquid material discharge speed. Preferably, the roll material rack includes a material seat, a bottom material support shaft, a material bearing seat, a material support roller, a side material support shaft, and a roll roller. Two bottom material support shafts are arranged side-by-side on the inner bottom of the material seat. A material bearing seat is mounted on each bottom material support shaft, and a material support roller is fixed to each material bearing seat. A side material support shaft for limiting the roll material is located on the upper inner side of the material seat. A roll roller is positioned above the two material support rollers. A damper for increasing the rotational resistance of the material support roller is located between the material support roller and the bottom material support shaft. Preferably, the material bonding conveying mechanism includes a material conveying seat, a material bonding conveying roller, a pressing bracket, a flattening pressure roller, a material conveying motor, a rotating shaft, and a photoelectric sensor. The material bonding conveying roller is mounted inside the material conveying seat via the rotating shaft. A pressing bracket is fixed to the upper side of the material conveying seat. A flattening pressure roller for pressing the material bonding conveying roller surface is mounted on the pressing bracket. A material conveying motor is fixed to the side of the material conveying seat. The material conveying motor is connected to the rotating shaft. A photoelectric sensor for detecting the number of rotations of the rotating shaft is installed between the rotating shaft and the material conveying seat. Preferably, the material is closely attached to the conveying roller and has a groove along its width, and a semi-circular elastic retaining plate is provided in the groove. Preferably, a laser rangefinder for measuring the thickness of the material adhering to the surface of the conveyor roller is provided at a fixed distance from the side of the material. Preferably, the spray gap adjustment mechanism includes a gap adjustment fixed seat, a gap adjustment sliding seat, a gap adjustment guide rail, and a gap adjustment motor. The gap adjustment sliding seat is fixed to the gap adjustment fixed seat via the gap adjustment guide rail. The gap adjustment fixed seat and the gap adjustment motor are fixedly arranged relative to each other. A lead screw is connected to the rotation shaft of the gap adjustment motor, and the lead screw passes through a threaded sleeve provided on the gap adjustment sliding seat. Preferably, the spraying mechanism includes a spraying base plate, a spraying storage tank, a filling pipe connector, a connecting plate, and a liquid outlet gap. The spraying storage tank is disposed above and below the spraying base plate. The spraying storage tank is connected to the side of the spraying base plate via the connecting plate. The side of the spraying storage tank and the spraying base plate facing the material and in close contact with the conveying roller is provided with a liquid outlet gap for liquid materials. The side of the spraying storage tank is provided with a filling pipe connector for inputting liquid materials. Preferably, the upper side of the spraying material storage box is provided with an inflation port for inputting high-pressure gas, the side of the spraying material storage box is provided with a liquid filling port for inputting liquid material, the liquid filling pipe connector is threaded to the liquid filling port, and the lower side of the spraying material storage box is provided with a liquid storage groove; the liquid storage groove and the smooth plate on the upper surface of the spraying base plate form a liquid storage chamber, and the liquid outlet gap is located at the bottom edge of the liquid storage chamber. Preferably, the side of the constant temperature drying oven is provided with a heating arc surface, which is in close contact with the arc surface of the material conveying roller. A channel for the material to pass through is provided between the heating arc surface and the arc surface of the material conveying roller. The side of the constant temperature drying oven is provided with a constant temperature liquid inlet pipe and a constant temperature liquid outlet pipe. Preferably, the uniform material flow valve is a ball valve, and the uniform material flow valve is equipped with an airflow regulating motor for driving the opening and closing of the uniform material flow valve.

[0005] The beneficial effects of this invention are as follows: By incorporating a material close-fitting conveying mechanism, a spraying gap adjustment mechanism, a spraying mechanism, a constant temperature drying oven, a uniform material flow valve, and a laser rangefinder into the equipment, this invention can adapt to materials of different thicknesses by adjustment, and can also adjust the spraying thickness as needed, resulting in a more uniform spraying thickness. It can also dry the sprayed material at a constant temperature, which is highly efficient and stable, and can well meet the needs of repeated small-batch manufacturing experiments in the laboratory. Attached Figure Description

[0006] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features, wherein: Figure 1 This is a three-dimensional schematic diagram of a tabletop coating machine according to the present invention; Figure 2 This is a 3D schematic diagram of a roll material rack; Figure 3 This is a rear-view 3D schematic diagram of the spray gap adjustment mechanism; Figure 4 This is a front-view 3D schematic diagram of the spray gap adjustment mechanism; Figure 5 This is a three-dimensional schematic diagram of the spraying mechanism; Figure 6 This is an exploded view of the spraying mechanism; Figure 7 This is a three-dimensional schematic diagram of the spray coating storage box; Figure 8 This is a cross-sectional view of the spray coating storage box; Figure 9 It is a three-dimensional schematic diagram of the material closely adhering to the conveying mechanism; Figure 10 yes Figure 9 Enlarged view of part A in the middle; Figure 11 This is a front-view 3D schematic diagram of a constant temperature drying oven; Figure 12 This is a rear-view 3D schematic diagram of a constant temperature drying oven.

[0007] In the diagram: 1-Roll material rack, 11-Material seat, 12-Material bottom support shaft, 13-Material bearing seat, 14-Material support roller, 15-Material side support shaft, 16-Roll roller, 2-Material tightly fitting conveying mechanism, 21-Material conveying seat, 22-Material tightly fitting conveying roller, 23-Pressure bracket, 24-Flattening pressure roller, 25-Material conveying motor, 26-Rotating shaft, 27-Photoelectric sensor, 3-Spraying gap adjustment mechanism, 31-Gap adjustment fixing 32-Gap Adjustment Sliding Seat, 33-Gap Adjustment Guide Rail, 34-Gap Adjustment Motor, 4-Spraying Mechanism, 41-Spraying Base Plate, 411-Gloss Plate, 42-Spraying Storage Box, 421-Filling Hole, 422-Air Inlet, 423-Storage Recess, 43-Filling Pipe Connector, 44-Connecting Plate, 45-Outlet Gap, 5-Constant Temperature Drying Oven, 51-Heating Arc Surface, 52-Constant Temperature Inlet Pipe, 53-Constant Temperature Outlet Pipe, 6-Plain Material Airflow Valve, 7-Controller. Detailed Implementation

[0008] See Figure 1 and Figure 2 This invention discloses a tabletop coating machine, comprising a roll material rack 1 for storing roll material, a material bonding and conveying mechanism 2, a spraying gap adjustment mechanism 3, a spraying mechanism 4, a constant temperature drying oven 5, a uniform material flow valve 6, and a controller 7. The roll material rack 1 has a material bonding and conveying mechanism 2 on its side for bonding, tightening, and conveying the material. The material bonding and conveying mechanism 2 has a spraying mechanism 4 on its side for uniformly spraying liquid material onto the surface of the sheet material. The spraying mechanism 4 is fixed on the spraying gap adjustment mechanism 3 for adjusting the gap between the spraying mechanism 4 and the material bonding and conveying mechanism 2. The spraying mechanism 4 is equipped with a laser rangefinder for measuring the distance between the spraying mechanism 4 and the material bonding and conveying mechanism 2. The side of mechanism 2 is equipped with a constant temperature drying chamber 5 for drying the coated sheet material that is attached to the material conveying mechanism 2 after spraying. The spraying mechanism 4 is connected to a uniform airflow valve 6 via an air pipe to provide high-speed airflow to the spraying mechanism 4 to increase the liquid discharge speed. In order to make the various moving parts in the equipment work together to achieve the best state, the equipment needs a controller 7. The controller 7 is connected to the electrical components in the equipment via a data cable. The controller 7 controls the working state of the electrical components in the equipment, including the working state of the motor in the material conveying mechanism 2, the working state of the motor in the spraying gap adjustment mechanism 3, and the working state of the motor in the uniform airflow valve 6, so as to control the amount of airflow output.

[0009] Specifically, such as Figure 2As shown, the roll material rack 1 includes a material seat 11, a material bottom support shaft 12, a material bearing seat 13, a material support roller 14, a material side support shaft 15, and a roll roller 16. Two material bottom support shafts 12 are arranged side-by-side on the inner bottom of the material seat 11. Material bearing seats 13 are mounted on the material bottom support shafts 12, and material support rollers 14 are fixed on the material bearing seats 13. A material side support shaft 15 for limiting the roll material is located on the upper inner side of the material seat 11. A roll roller 16 is located on the upper side between the two material support rollers 14. A support shaft for raising the roll material is located between the material support rollers 14 and the material bottom support shafts 12. The damper reduces the rotational resistance of the material support roller 14. When the end of the winding roller 16 is pulled, the winding roller 16 rotates on the material support roller 14. The material support roller 14 rotates relative to the bottom support shaft 12 through the bearing in the material bearing seat 13, allowing for smooth output of the sheet material. The damper increases the rotational resistance of the material support roller 14 and the winding roller 16, thereby tensioning the end of the winding roller 16 and allowing it to better adhere to the material and the conveying mechanism 2, resulting in more uniform spraying and preventing wrinkles on the sheet material. The damper is a rotary damper, which is existing technology and readily available on the market. Specifically, such as... Figure 9 and Figure 10 As shown, the material pressing and conveying mechanism 2 includes a material conveying seat 21, a material pressing and conveying roller 22, a pressing bracket 23, a flattening pressure roller 24, a material conveying motor 25, a rotating shaft 26, and a photoelectric sensor 27. The material pressing and conveying roller 22 is mounted inside the material conveying seat 21 via the rotating shaft 26. The pressing bracket 23 is fixedly mounted on the upper side of the material conveying seat 21. The pressing bracket 23 is equipped with a flattening pressure roller 24 for pressing the surface material of the material pressing and conveying roller 22. A material pressing and conveying motor 25 is mounted on the pressing bracket 26. The material conveying seat 21 is also equipped with a material pressing and conveying motor 26. A material conveying motor 25 is connected to a rotating shaft 26. A photoelectric sensor 27 for detecting the number of rotations of the rotating shaft 26 is installed between the rotating shaft 26 and the material conveying seat 21. The material conveying motor 25 drives the material-adhering conveying roller 22 and the rotating shaft 26 to rotate. The flattening roller 24 presses the material against the surface of the material-adhering conveying roller 22, thus pressing the sheet material against the surface of the material-adhering conveying roller 22. The photoelectric sensor 27 detects the number of rotations of the material-adhering conveying roller 22. It should be noted that, as Figure 1 As shown, the material is closely attached to the conveyor roller 22 and a groove is provided along the width direction. A semi-arc-shaped elastic plate is provided in the groove. The elastic plate can be opened and closed elastically through the opening. The upper and lower edges of the elastic plate press against the sides of the groove, so that the plate can be fixed in the groove. The plate material of this application is a copper film material with a very small thickness in the battery cell.

[0010] Understandably, a laser rangefinder for measuring the surface thickness of the material adhering to the conveyor roller 22 is fixedly positioned at a fixed distance on the side of the material adhering to the conveyor roller 22. Initially, the distance between the material adhering to the conveyor roller 22 and the laser rangefinder is fixed. Similarly, when a sheet of material of a set thickness is adhered to the surface of the material adhering to the conveyor roller 22, the distance between the sheet and the laser rangefinder is also fixed. After the liquid coating is applied to the sheet surface, the distance between the sheet and the laser rangefinder changes. Calculations can be made to obtain the coating thickness and relative thickness. The coating thickness is the reduced value of the distance between the sheet and the laser rangefinder. The relative thickness is the thickness change of the sheet after coating, passing through different positions on the laser rangefinder. For example, in some areas... The thickness of the coating varies depending on the area being coated, resulting in different distances measured by the laser rangefinder. The laser rangefinder allows for real-time monitoring of the coating thickness. The coating mechanism 4 is equipped with a laser rangefinder to measure the distance between it and the material conveying mechanism 2. This laser rangefinder serves a different purpose than the one fixed at a fixed distance from the side of the material conveying roller 22. The latter's purpose is to continuously monitor the coating thickness.

[0011] Specifically, such as Figure 3 and Figure 4 As shown, the spraying gap adjustment mechanism 3 includes a gap adjustment fixed seat 31, a gap adjustment sliding seat 32, a gap adjustment guide rail 33, and a gap adjustment motor 34. The gap adjustment sliding seat 32 is fixed to the gap adjustment fixed seat 31 via the gap adjustment guide rail 33. The gap adjustment fixed seat 31 and the gap adjustment motor 34 are fixedly arranged relative to each other. A lead screw is connected to the rotating shaft 26 of the gap adjustment motor 34. The lead screw passes through the threaded sleeve set on the gap adjustment sliding seat 32. The gap adjustment motor 34 drives the lead screw to rotate, and the lead screw drives the threaded sleeve and the gap adjustment sliding seat 32 to slide along the gap adjustment guide rail 33, ultimately achieving the purpose of adjusting the distance between the spraying mechanism 4 and the material close-fitting conveying mechanism 2.

[0012] It should be noted that, as Figure 5 As shown, the spraying mechanism 4 includes a spraying base plate 41, a spraying storage tank 42, a liquid filling pipe connector 43, a connecting plate 44, and a liquid outlet gap 45. The spraying storage tank 42 is arranged vertically above the spraying base plate 41. The sides of the spraying storage tank 42 and the spraying base plate 41 are connected by the connecting plate 44. A liquid outlet gap 45 for liquid materials is provided on the side of the spraying storage tank 42 and the spraying base plate 41 facing the material and in close contact with the conveying roller 22. A liquid filling pipe connector 43 for inputting liquid materials is provided on the side of the spraying storage tank 42. This is understandable, as... Figures 6-8As shown, the upper side of the spraying storage tank 42 is provided with an air inlet 422 for inputting high-pressure gas, and the side of the spraying storage tank 42 is provided with a liquid filling hole 421 for inputting liquid material. The liquid filling pipe connector 43 is threadedly connected to the liquid filling hole 421. The lower side of the spraying storage tank 42 is provided with a liquid storage groove 423. The liquid storage groove 423 and the smooth plate 411 on the upper surface of the spraying base plate 41 form a liquid storage chamber. The liquid outlet gap 45 is located at the bottom edge of the liquid storage chamber. By making the liquid outlet gap 45 located at the bottom edge of the liquid storage chamber, the liquid storage chamber can store a certain amount of gas. That is, when liquid is injected into the liquid storage chamber, the air in the upper part of the liquid storage chamber cannot be expelled, so the air in the upper part of the liquid storage chamber is compressed. When the material input pressure decreases, the compressed air in the liquid storage chamber will release a certain pressure to ensure that the liquid output speed is similar.

[0013] It should be noted that, as Figure 11 and Figure 12 As shown, a heating arc surface 51 is provided on the side of the constant temperature drying oven 5. The heating arc surface 51 is in close contact with the arc surface of the material conveying roller 22. A channel for the board material to pass through is provided between the heating arc surface 51 and the arc surface of the material conveying roller 22. A constant temperature liquid inlet pipe 52 and a constant temperature liquid outlet pipe 53 are provided on the side of the constant temperature drying oven 5. A liquid with a constant temperature, such as water, is injected into the constant temperature drying oven 5 through the constant temperature liquid inlet pipe 52. The coating on the surface of the board material can be dried through the heating arc surface 51. The liquid is then input through the constant temperature liquid outlet pipe 53 and heated again by the heating equipment.

[0014] Specifically, the uniform material flow valve 6 is a ball valve. It is equipped with an airflow regulating motor that rotates the valve. This motor controls the ball valve's rotation, thus regulating the output airflow. Adjusting the airflow changes the output speed of the liquid material from the spraying mechanism 4. Since the output of the liquid material supply mechanism is not absolutely stable, fluctuations in supply can reduce the material output speed by increasing or decreasing the airflow speed. For example, if the amount of material supplied per unit time decreases, the airflow regulating motor reduces the air supply of the uniform material flow valve 6, thereby reducing air pressure and airflow velocity, thus decreasing the liquid output. Conversely, if the airflow regulating motor increases the air supply of the uniform material flow valve 6, it increases air pressure and airflow velocity, thus increasing the liquid output. This ensures that the amount of liquid material output per unit time is as consistent as possible, while simultaneously slowing down or speeding up the material's contact with the conveying mechanism 2 and the output plate.

[0015] Working process of this invention: In the operation of this tabletop coating machine, the roll roller 16 is placed on two material support rollers 14 of the roll material rack 1, the material-side support shaft 15 limits the roll roller 16, and the damper is in a preset resistance state; the elastic plate that tightly adheres to the surface of the material conveying roller 22 is in an elastically open state, and the flattening pressure roller 24 is in a preset position close to the material tightly adhering to the material conveying roller 22; the spraying mechanism 4 is adjusted to the initial set distance with the material tightly adhering to the material conveying roller 22 by the spraying gap adjustment mechanism 3, and the laser rangefinder (on the side of the spraying mechanism 4) monitors the distance in real time and feeds it back to the controller 7; the spraying storage tank 42 has been filled with sufficient liquid material through the liquid filling pipe joint 43, and an appropriate amount of compressed air is left in the upper part of the liquid storage chamber; the constant temperature drying oven 5 is circulated with constant temperature liquid through the constant temperature liquid inlet pipe 52 and the constant temperature liquid outlet pipe 53, and the heating arc surface 51 maintains the set temperature; the uniform material airflow valve 6 is in the initial opening position, the controller 7 establishes a signal connection with all electrical components (motor, sensor, etc.), and the whole equipment is ready for operation.

[0016] The manual traction mechanism pulls the end of the copper sheet material on the roll roller 16 out, through the gap between the material-fitting conveyor roller 22 and the flattening roller 24, and embeds it into the groove of the material-fitting conveyor roller 22. The elastic clamping plate fixes the edge of the sheet material through its elastic opening and closing characteristics, achieving precise positioning. At this time, the roll roller 16 rotates relative to the material support roller 14 under the action of the sheet material traction force. The material support roller 14 rotates smoothly relative to the bottom support shaft 12 of the material material through the bearing seat. The damper provides stable rotational resistance, so that the sheet material is always kept in a taut state, avoiding loosening and wrinkling. The controller 7 starts the material conveying motor 25. The motor drives the rotating shaft 26 and the material-fitting conveyor roller 22 to rotate synchronously. The sheet material is conveyed forward at a uniform speed with the conveyor roller. The flattening roller 24 continuously presses the surface of the sheet material, further flattening the sheet material, ensuring that there is no slippage or wrinkling during the conveying process. At the same time, the photoelectric sensor 27 detects the number of rotations of the rotating shaft 26 in real time and feeds the data back to the controller 7 to accurately calculate the sheet material conveying speed and conveying length, providing a synchronous reference for subsequent spraying and airflow adjustment.

[0017] The motor drives the lead screw to rotate, causing the clearance adjustment sliding seat 32 to slide along the guide rail until the spraying mechanism 4 reaches the set gap, ensuring that the spraying gap is adapted to the thickness of the sheet material and the characteristics of the coating. The controller 7 starts the liquid supply to the spraying mechanism 4 and simultaneously starts the airflow regulating motor of the uniform airflow valve 6. According to the preset parameters, the opening of the ball valve is adjusted to introduce high-speed airflow into the spraying mechanism 4, assisting the liquid material to be discharged evenly from the liquid outlet gap 45. When the liquid supply pressure fluctuates, the compressed air in the upper part of the liquid storage chamber releases pressure to compensate for the fluctuation. At the same time, the laser rangefinder (on the conveyor roller side) detects the coating thickness change in real time and feeds it back to the controller 7. The controller 7 adjusts the airflow regulating motor to adjust the liquid output speed by changing the airflow rate, ensuring that the liquid output volume per unit time is stable. The liquid material forms a uniform liquid film through the liquid outlet gap 45 and is coated on the surface of the sheet material being conveyed at a uniform speed, achieving continuous and uniform spraying. The cooperation between the elastic plate and the groove prevents the sheet material from shifting in the width direction, ensuring accurate coating coverage and no missed or uneven coating.

[0018] After spraying, the sheet material adheres tightly to the conveyor roller 22 and enters the constant temperature drying chamber 5. The heating arc surface 51 precisely fits against the arc surface of the conveyor roller to form a sealed drying channel. The constant temperature circulating liquid provides uniform and stable heat to the coating through the heating arc surface 51, rapidly evaporating the moisture in the coating. During the drying process, the sheet material remains in contact with the surface of the conveyor roller to prevent coating cracking due to heat deformation. At the same time, the sealed channel reduces heat loss and improves drying efficiency. After being dried at the constant temperature, the sheet material continues to be conveyed forward by the conveyor roller.

[0019] This invention discloses a tabletop coating machine that achieves multi-mechanism collaborative operation. A controller 7 centrally manages core actions such as material contact conveying, spray gap adjustment, and uniform airflow output, ensuring precise coordination of each process and significantly improving the overall operational coordination and automation level of the equipment, overcoming the drawbacks of independent operation of each mechanism in traditional equipment. With the cooperation of the spray gap adjustment mechanism 3 and a laser rangefinder, the distance between the spraying mechanism 4 and the material contact conveying mechanism 2 can be accurately measured and flexibly adjusted in real time, adapting to different sheet thicknesses and coating characteristics, providing a fundamental guarantee for coating uniformity. The uniform airflow valve 6 provides high-speed airflow to the spraying mechanism 4, effectively improving the liquid discharge speed and output stability; the constant temperature drying oven 5 promptly dries the sprayed sheet, preventing coating dripping or contamination, ensuring coating quality, and forming a complete operational chain of "stable conveying - precise spraying - efficient drying". The damper of the roll material rack 1 increases the rotational resistance of the material support roller 14 and the roll roller 16, ensuring that the sheet material remains taut during output, preventing wrinkles and shifts caused by slack, and ensuring that the sheet material fits tightly against the conveying mechanism, laying the foundation for subsequent uniform spraying. At the same time, the material-side support shaft 15 limits the roll material, preventing it from shifting during unloading and further improving conveying stability. The flattening pressure roller 24 presses the sheet material tightly against the surface of the material-fitting conveying roller 22, achieving flattening and fixing of the sheet material, preventing slippage or wrinkling during conveying. The photoelectric sensor 27 detects the number of rotations of the rotating shaft 26 in real time, accurately calculating the sheet material conveying speed and conveying length, providing data support for the controller 7 to adjust the actions of each mechanism, and ensuring the matching of process rhythm. A semi-circular elastic clamp uses its elastic opening and closing characteristics to fix the ultra-thin copper film material in the groove, achieving precise positioning of the material and preventing it from shifting along the width direction during transportation. The flexible fixing design of the elastic clamp ensures reliable positioning without damaging the ultra-thin material, making it suitable for processing precision materials such as copper film for battery cells. The laser rangefinder can detect the thickness and relative thickness changes of the coating after spraying in real time. By accurately calculating the coating thickness through distance differences, it can promptly detect localized thickness unevenness, providing feedback to the controller 7 to adjust spraying parameters, ensuring consistent coating thickness and meeting the stringent precision requirements of precision machining. The gap adjustment motor 34 drives the lead screw to rotate, which in turn drives the gap adjustment sliding seat 32 to slide smoothly along the guide rail, achieving stepless and precise adjustment of the spraying gap. This provides high adjustment accuracy and fast response speed. The stable lead screw transmission structure can maintain the set gap value for a long time, preventing gap shift due to vibration and other factors, and ensuring consistent spraying. The liquid outlet gap 45 formed between the spraying storage tank 42 and the spraying base plate 41 allows the liquid to form a uniform liquid film and be coated on the surface of the board, avoiding problems such as dripping and uneven spraying; the liquid filling pipe connector 43 facilitates quick replenishment of liquid, simplifies the operation process, and improves work efficiency.

[0020] The compressed air stored in the upper part of the liquid storage chamber can release pressure when the liquid supply pressure decreases, compensating for supply fluctuations and ensuring a stable liquid output speed. The air inlet 422 allows for the input of high-pressure gas to assist in liquid discharge, further improving the uniformity and continuity of liquid output and reducing coating thickness fluctuations. The heating arc surface 51 precisely conforms to the arc surface of the material conveying roller 22, forming a well-sealed drying channel, reducing heat loss and improving heat utilization efficiency. The constant-temperature circulating liquid achieves uniform heating of the sheet coating through the heating arc surface 51, avoiding localized overheating that could lead to coating cracking, while also shortening drying time and improving work efficiency and coating adhesion. The airflow regulating motor drives the ball valve to precisely regulate the airflow rate, dynamically adapting the airflow speed according to liquid supply fluctuations, compensating for supply differences, and ensuring a stable liquid output per unit time. Simultaneously, it can adjust airflow parameters in conjunction with the sheet conveying speed to achieve precise matching between the spraying volume and conveying speed, further ensuring coating uniformity.

[0021] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A tabletop coating machine, characterized in that: The system includes a roll material rack for storing roll material, a material bonding and conveying mechanism, a spraying gap adjustment mechanism, a spraying mechanism, a constant temperature drying oven, and a uniform material flow valve. The roll material rack has a material bonding and conveying mechanism on its side for bonding, tightening, and conveying the material. The material bonding and conveying mechanism has a spraying mechanism on its side for uniformly spraying liquid material onto the sheet surface. The spraying mechanism is fixed to a spraying gap adjustment mechanism for adjusting the gap between the spraying mechanism and the material bonding and conveying mechanism. The spraying mechanism is equipped with a laser rangefinder for measuring the distance between the spraying mechanism and the material bonding and conveying mechanism. The material bonding and conveying mechanism has a constant temperature drying oven on its side for drying the sprayed sheet material bonded to the material bonding and conveying mechanism. The spraying mechanism is connected via an air pipe to a uniform material flow valve that provides high-speed airflow to the spraying mechanism to increase the liquid material discharge speed.

2. The tabletop coating machine as described in claim 1, characterized in that: The coil material rack includes a material seat, a material bottom support shaft, a material bearing seat, a material support roller, a material side support shaft, and a coil roller. Two material bottom support shafts are arranged side-by-side on the inner bottom of the material seat. A material bearing seat is mounted on each material bottom support shaft, and a material support roller is fixed to each material bearing seat. A material side support shaft for limiting the movement of the coil is located on the upper inner side of the material seat. A coil roller is positioned above the two material support rollers. A damper for increasing the rotational resistance of the material support roller is located between the material support roller and the material bottom support shaft.

3. The tabletop coating machine as described in claim 1, characterized in that: The material bonding conveying mechanism includes a material conveying seat, a material bonding conveying roller, a pressing bracket, a flattening pressure roller, a material conveying motor, a rotating shaft, and a photoelectric sensor. The material bonding conveying roller is mounted inside the material conveying seat via the rotating shaft. A pressing bracket is fixed on the upper side of the material conveying seat, and a flattening pressure roller for pressing the material bonding conveying roller surface is mounted on the pressing bracket. A material conveying motor is fixed on the side of the material conveying seat and is connected to the rotating shaft. A photoelectric sensor for detecting the number of rotations of the rotating shaft is installed between the rotating shaft and the material conveying seat.

4. A tabletop coating machine as described in claim 3, characterized in that: The material is closely attached to the conveyor roller and has a groove along its width. A semi-circular elastic retainer is installed in the groove.

5. A tabletop coating machine as described in claim 1, characterized in that: A laser rangefinder is installed at a fixed distance from the side of the material that is in close contact with the conveyor roller to measure the thickness of the material's surface in close contact with the conveyor roller.

6. A tabletop coating machine as described in claim 1, characterized in that: The spray gap adjustment mechanism includes a gap adjustment fixed seat, a gap adjustment sliding seat, a gap adjustment guide rail, and a gap adjustment motor. The gap adjustment sliding seat is fixed to the gap adjustment fixed seat via the gap adjustment guide rail. The gap adjustment fixed seat and the gap adjustment motor are fixedly arranged relative to each other. A lead screw is connected to the rotation shaft of the gap adjustment motor, and the lead screw passes through a threaded sleeve provided on the gap adjustment sliding seat.

7. A tabletop coating machine as described in claim 3, characterized in that: The spraying mechanism includes a spraying base plate, a spraying storage tank, a filling pipe connector, a connecting plate, and a liquid outlet gap. The spraying storage tank is arranged vertically above the spraying base plate. The spraying storage tank is connected to the side of the spraying base plate via the connecting plate. The side of the spraying storage tank and the spraying base plate facing the material and in close contact with the conveying roller is provided with a liquid outlet gap for liquid materials. The side of the spraying storage tank is provided with a filling pipe connector for inputting liquid materials.

8. A tabletop coating machine as described in claim 7, characterized in that: The upper side of the spraying material storage box is provided with an inflation port for inputting high-pressure gas, and the side of the spraying material storage box is provided with a liquid filling port for inputting liquid material. The liquid filling pipe connector is threaded to the liquid filling port, and the lower side of the spraying material storage box is provided with a liquid storage groove. The liquid storage groove and the smooth plate on the upper surface of the spraying base plate form a liquid storage chamber, and the liquid outlet gap is located at the bottom edge of the liquid storage chamber.

9. A tabletop coating machine as described in claim 3, characterized in that: The constant temperature drying oven has a heating arc surface on its side, which is in close contact with the arc surface of the material conveying roller. A channel for the material to pass through is provided between the heating arc surface and the arc surface of the material conveying roller. The constant temperature drying oven also has a constant temperature liquid inlet pipe and a constant temperature liquid outlet pipe on its side.

10. A tabletop coating machine as described in claim 3, characterized in that: The uniform material flow valve is a ball valve, and an airflow regulating motor is provided on the uniform material flow valve to drive the valve's opening and closing rotation.

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