A roller-type blind-slot wet film coating device

Abstract

This invention relates to the field of coating equipment technology, specifically disclosing a roller-type blind slot wet film coating device, including a base. A top cover is mounted on the four corners of the base's upper surface via supporting protrusions. Two electric cylinders are connected to the lower surface of the top cover via two sets of screw drive assemblies. The output ends of the electric cylinders face the base and are equipped with suction cups. A feeding platform, a dust-adhesive roller, a liquid storage tank, a drying area, and a material-retrieving platform are arranged horizontally on the upper surface of the base. In this invention, when the coating roller rotates, the insertion rods at different positions are sequentially positioned on the upper side, facilitating coating of blind slots at different locations on the circuit board. This eliminates the need for personnel to repeatedly reposition the circuit board when coating different blind slots. Furthermore, since the insertion rods are only inserted into the blind slots for coating, the resource waste caused by spraying coating liquid onto other parts of the windowed mesh plate in traditional solutions is avoided.

Description

Technical Field

[0001] This invention relates to the field of coating apparatus technology, and more particularly to a roller-type blind-slot wet film coating apparatus. Background Technology

[0002] Neither wet film screen printing nor dry film lamination can effectively coat the blind slots on PCBs, making the process difficult. Conventional blind slot boards are usually protected by dry film sealing during etching. When the blind slot size exceeds the dry film sealing capacity, manual wet film coating is usually used for protection. However, even with purely manual wet film coating, there are problems such as uneven film thickness and difficulty in controlling coating precision, which often leads to high scrap rates after the board enters the etching process. This seriously restricts quality improvement and reduces production efficiency. Therefore, a device that can coat blind slots is needed.

[0003] The existing application number is 201120262655.8, which describes a wet film coating device for blind slots of printed circuit boards. It includes a screen printing table (1), on which a blind slot circuit board (3) is disposed. A windowed screen is disposed above the blind slot circuit board (3), and a spray gun (7) is disposed above the windowed screen (5).

[0004] While the aforementioned technology achieves a certain degree of coating effect on blind slots by masking the rest of the circuit board and spraying the blind slots with a spray gun, the spray gun easily sprays other parts of the windowed mesh board, resulting in resource waste. Furthermore, since the windowed mesh board only has one window, personnel need to move the circuit board multiple times to spray the remaining blind slots, making the device inconvenient to use. Therefore, to solve the above technical problems, we propose a roller-type blind slot wet film coating device. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a roller-type blind slot wet film coating device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A roller-type blind slot wet film coating device includes a base. A top cover is mounted on the four corners of the upper surface of the base through support protrusions. The lower surface of the top cover is connected to two electric cylinders through two sets of screw drive assemblies. The output end of the electric cylinder faces the base and is equipped with a suction cup. The upper surface of the base is arranged horizontally in sequence with a feeding platform, a dust-adhesive roller, a liquid storage tank, a drying zone, and a picking platform. A blower is installed inside the drying zone. A coating roller is rotatably installed at the end of the liquid storage tank near the dust-adhesive roller. The outer ring of the coating roller is provided with two sets of insertion rods corresponding to the suction cups. The insertion rods correspond to the blind slots of the circuit board. A first motor is installed on the rear side of the base corresponding to the coating roller.

[0008] Preferably, the base is provided with a feeding conveyor belt and a discharging conveyor belt at both ends, and the feeding conveyor belt and the discharging conveyor belt are respectively installed at the feeding platform and the picking platform.

[0009] Preferably, the lead screw drive assembly includes two second motors, two lead screws, and two mounting seats. The electric cylinders are respectively mounted on the lower surface of the corresponding mounting seats, the mounting seats are engaged with the corresponding lead screw bodies, the lead screws are mounted on the lower surface of the top cover, and the output end of the second motor is connected to the end of the corresponding lead screw.

[0010] Preferably, the lower surface of the top cover is provided with two sets of guide rails, each set of guide rails being located on both sides of the lead screw.

[0011] Preferably, both the dust-adhesive roller and the coating roller are equipped with pulleys at one end extending outside the base, and the two pulleys are connected by a belt.

[0012] Preferably, the base has a cleaning zone inside corresponding to the dust-adhesive roller, and a cylindrical cleaning brush is installed on the inner bottom surface of the cleaning zone. The upper surface of the cleaning brush is in contact with the outer ring surface of the dust-adhesive roller.

[0013] Preferably, a collection cylinder is installed at the lower end of the dust removal zone, a suction fan is installed inside the collection cylinder, and a filter plate is installed at the end of the collection cylinder located outside the base.

[0014] Preferably, the collecting cylinder is connected to the base via threads, and the cylinder body is transparent.

[0015] Preferably, a scraper is installed at the end of the liquid storage tank away from the coating roller, and a liquid supply pipe is installed on the bottom surface of the liquid storage tank. The lower end of the liquid supply pipe extends downward at an angle to the outside of the base and is equipped with a valve.

[0016] Preferably, the upper surface of the drying zone is provided with a first filter plate, the lower end of the drying zone extends to the outside of the base and is equipped with a second filter plate, and the interior of the drying zone is provided with several heating rods.

[0017] The roller-type blind-slot wet film coating device proposed in this invention has the following advantages:

[0018] 1. In this invention, through the cooperation of the aforementioned components, when the first motor drives the coating roller to rotate, the manhole rods at different positions are sequentially positioned on the upper side, facilitating the coating of blind slots at different locations on the circuit board. This eliminates the need for personnel to repeatedly reposition the circuit board when coating different blind slots. Furthermore, since the manhole rods are only inserted into the blind slots for coating, the coating liquid is prevented from adhering to other parts of the circuit board, thus avoiding the resource waste caused by coating liquid being sprayed on other parts of the windowed mesh in traditional solutions. Moreover, since the blind slots on the circuit board are in a downward-facing state, excess coating liquid drips directly downwards under gravity and flows back into the storage tank during coating. This not only prevents the coating liquid from accumulating on the bottom surface of the blind slots, thus avoiding uneven coating, but also further improves the effective utilization of resources, facilitating subsequent processing of the circuit board.

[0019] 2. The conveyor belt in this invention facilitates automatic loading and unloading, saving manpower. The pulleys and belt facilitate the driving of the dust-collecting roller by the first motor. The cleaning brush facilitates cleaning the outer ring surface of the dust-collecting roller. When the dust-collecting roller rotates, it comes into contact with the cleaning brush, and the dust cleaned by the brush is moved by the suction fan along the airflow until it is collected in the collection cylinder. The cylinder is transparent, allowing personnel to easily check the amount of dust in the collection cylinder. When there is a lot of dust, the collection cylinder can be removed for cleaning. The scraper blade facilitates the scraping off of excess coating liquid dripping onto the circuit board surface, further improving the efficient use of resources. The liquid supply pipe not only facilitates the replenishment of coating liquid by an external pump, but also allows for convenient recycling of unused coating liquid when the equipment is shut down. The heating rod allows personnel to control the temperature of the gas blown onto the circuit board as needed, thereby shortening the drying time of the circuit board. Attached Figure Description

[0020] Figure 1 This is an isometric view of a roller-type blind-slot wet film coating device proposed in this invention;

[0021] Figure 2 This is an isometric view of a roller-type blind-slot wet film coating device proposed in this invention;

[0022] Figure 3 This is a schematic diagram of the screw drive assembly of a roller-type blind slot wet film coating device proposed in this invention;

[0023] Figure 4 This is a schematic diagram of the base of a roller-type blind groove wet film coating device proposed in this invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of the base of a roller-type blind slot wet film coating device proposed in this invention;

[0025] Figure 6 This is a schematic diagram of the pulley assembly of a roller-type blind slot wet film coating device proposed in this invention.

[0026] In the diagram: 1. Base; 2. Top cover; 3. Electric cylinder; 4. Suction cup; 5. Dust-adhesive roller; 6. Liquid storage tank; 7. Blower; 8. Coating roller; 9. Manhole rod; 10. Feed conveyor belt; 11. Discharge conveyor belt; 12. Second motor; 13. Lead screw; 14. Mounting base; 15. Guide rail; 16. First motor; 17. Pulley; 18. Belt; 19. Cleaning brush; 20. Collection cylinder; 21. Suction fan; 22. Filter plate; 23. Scraper; 24. Liquid supply pipe; 25. First filter plate; 26. Second filter plate; 27. Heating rod. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Example 1

[0029] Reference Figure 1-6 A roller-type blind-slot wet film coating device includes a base 1. A top cover 2 is mounted on the four corners of the upper surface of the base 1 via support protrusions. Two electric cylinders 3 are connected to the lower surface of the top cover 2 via two sets of screw drive assemblies. The output ends of the electric cylinders 3 face the base 1 and are equipped with suction cups 4. A feeding platform, a dust-adhesive roller 5, a liquid storage tank 6, a drying zone, and a picking platform are arranged horizontally on the upper surface of the base 1. A blower 7 is installed inside the drying zone. A coating roller 8 is rotatably mounted on the end of the liquid storage tank 6 near the dust-adhesive roller 5, with the outer ring of the coating roller 8 corresponding to the suction cups 4. Two sets of insertion rods 9 are provided, each set of insertion rods 9 is distributed around the outer ring surface of the coating roller 8, and the distribution position of the insertion rods 9 corresponds to the blind slot of the circuit board to be processed. The insertion rods 9 correspond to the blind slot of the circuit board. A first motor 16 is installed on the rear side of the base 1 corresponding to the coating roller 8. That is, when in use, half of the coating roller 8 is immersed in the coating liquid. Then, when the coating roller 8 rotates, the coating liquid remaining on the surface of the insertion rods 9 is applied to the blind slot of the circuit board along the insertion rods 9, thereby completing the coating treatment of the blind slot.

[0030] Example 2

[0031] Reference Figure 1-6 While all other parts are the same as in Example 1, the difference between this example and Example 1 is that:

[0032] The base 1 has a feeding conveyor belt 10 and a discharging conveyor belt 11 at its two ends, which are respectively installed at the feeding platform and the discharging platform. The two conveyor belts facilitate automatic loading and unloading, thus saving manpower. The screw drive assembly includes two second motors 12, two screws 13, and two mounting seats 14. The electric cylinders 3 are respectively installed on the lower surface of the corresponding mounting seats 14. The mounting seats 14 are engaged with the corresponding screws 13. The screws 13 are installed on the lower surface of the top cover 2. The output of the second motors 12... The end is connected to the end of the corresponding lead screw 13. The lead screw transmission assembly facilitates the movement of the two electric cylinders 3. The lower surface of the top cover 2 is provided with two sets of guide rails 15. Each set of guide rails 15 is located on both sides of the lead screw 13. The guide rails 15 facilitate the improvement of the stability of the mounting base 14 when it moves. The ends of the dust-adhesive roller 5 and the coating roller 8 extending to the outside of the base 1 are both equipped with pulleys 17. The two pulleys 17 are connected by a belt 18. The pulleys 17 and the belt 18 facilitate the driving of the dust-adhesive roller 5 by the first motor 16.

[0033] The base 1 has a cleaning zone corresponding to the dust-adhesive roller 5 inside. A cylindrical cleaning brush 19 is installed on the inner bottom surface of the cleaning zone. The upper surface of the cleaning brush 19 contacts the outer ring surface of the dust-adhesive roller 5. The cleaning brush 19 is designed to facilitate cleaning of the outer ring surface of the dust-adhesive roller 5. A collection cylinder 20 is installed at the lower end of the cleaning zone. A suction fan 21 is installed inside the collection cylinder 20. A filter plate 22 is installed at the end of the collection cylinder 20 located outside the base 1. The collection cylinder 20 is designed to facilitate the collection of dust cleaned from the outer ring surface of the dust-adhesive roller 5. The collection cylinder 20 is connected to the base 1 by threads. The cylinder body of the collection cylinder 20 is transparent. The threaded connection facilitates disassembly of the collection cylinder 20. The liquid storage tank 6 contains... A scraper 23 is installed at the end of the part away from the coating roller 8. A liquid supply pipe 24 is installed on the bottom surface of the liquid storage tank 6. The lower end of the liquid supply pipe 24 extends downward at an angle to the outside of the base 1 and is equipped with a valve. The scraper 23 is designed to remove excess coating liquid dripping onto the surface of the circuit board. A first filter plate 25 is provided on the upper surface of the drying area. A second filter plate 26 is installed at the lower end of the drying area extending to the outside of the base 1. Several heating rods 27 are provided inside the drying area. The filter plates help reduce the amount of dust in the gas blown out by the blower 7. The heating rods 27 allow personnel to control the temperature of the gas blown onto the circuit board as needed, thereby shortening the drying time of the circuit board.

[0034] Operating principle and advantages: In use, the operator first places the circuit board to be coated on the feeding platform, then activates the screw drive assembly, which moves the two electric cylinders 3 via the screw 13 until both cylinders 3 are at the circuit board and are held in place by the suction cup 4. The screw 13 then moves the circuit board to the feeding platform at the other end. During this process, the circuit board first comes into contact with the dust-adhesive roller 5, meaning the side of the circuit board to be coated is wiped by the dust-adhesive roller 5, thus achieving a dust removal effect and preventing dust residue from affecting the coating process. This process affects subsequent coating. After the circuit board passes the dust-adhesive roller 5, one end moves to the coating roller 8. At this time, the operator can move the circuit board horizontally using the lead screw 13 and move it up and down using the electric cylinder 3 until the blind slot of the circuit board is aligned with the upper inlet rod 9 on the outer ring surface of the coating roller 8. Then, the electric cylinder 3 controls the circuit board to move downward to the inlet rod 9 until the upper end of the inlet rod 9 is inserted into the blind slot. This allows the coating liquid on the outer ring surface of the inlet rod 9 to be evenly applied to the inner wall of the blind slot, thus achieving the effect of coating the blind slot.

[0035] Furthermore, in the above process, after the coating of this blind slot is completed, the circuit board can be moved upward and the first motor 16 drives the coating roller 8 to rotate. When the coating roller 8 rotates, the remaining insertion rods 9 are rotated to the upper side. Thus, through the continuous rotation of the coating roller 8, each blind slot on the circuit board can be coated by the insertion rods 9. In the above process, since the insertion rods 9 are only inserted into the blind slot for coating, the coating liquid can be prevented from adhering to other parts of the circuit board, thereby avoiding the resource waste caused by the coating liquid being sprayed on other parts of the windowed mesh plate in the traditional solution. With the blind slots of the circuit board facing downwards, excess coating liquid drips directly downwards and flows back into the storage tank 6 under gravity when the manhole rod 9 is applying the coating. This not only prevents the coating liquid from accumulating on the bottom surface of the blind slots and causing uneven application, but also further improves the efficient use of resources. After the blind slots of the circuit board are coated, they can continue to move via the lead screw 13, even moving it above the blower 7. At this time, the air blown by the blower 7 blows onto the circuit board, which accelerates the drying and curing of the blind slots, thus facilitating subsequent processing of the circuit board. Finally, the circuit board is placed on the unloading platform.

[0036] In summary, through the cooperation of the aforementioned components, when the first motor 16 drives the coating roller 8 to rotate, the insertion rods 9 at different positions are sequentially positioned on the upper side, which facilitates coating of blind slots at different locations on the circuit board. This eliminates the need for personnel to repeatedly move the circuit board when coating different blind slots. Furthermore, since the coating roller 8 is equipped with a dust-removing roller 5 on its front side, the surface of the circuit board can be cleaned first, thus keeping the circuit board clean during processing. At the same time, the setting of the blower 7 can accelerate the drying of the coating liquid in the blind slots, which is convenient for subsequent processing of the circuit board.

[0037] Furthermore, in the above process, the two conveyor belts facilitate automatic loading and unloading, thus saving manpower; the pulleys 17 and belt 18 facilitate the driving of the dust-collecting roller 5 by the first motor 16; the cleaning brush 19 facilitates the cleaning of the outer ring surface of the dust-collecting roller 5, that is, when the dust-collecting roller 5 rotates, it comes into contact with the cleaning brush 19, and at the same time, the dust cleaned by the cleaning brush 19 is moved by the suction fan 21 along the airflow until it is collected in the collection cylinder 20, and the cylinder of the collection cylinder 20 is transparent, so that personnel can easily see it. The amount of dust in the collection cylinder 20 is confirmed. When there is a lot of dust, the collection cylinder 20 can be removed and cleaned. The scraper 23 is set to remove excess coating liquid dripping onto the surface of the circuit board, which further improves the effective utilization of resources. The liquid supply pipe 24 not only facilitates the replenishment of coating liquid by an external pump, but also allows for convenient recycling of unused coating liquid when the equipment is shut down. The heating rod 27 allows personnel to control the temperature of the gas blown onto the circuit board as needed, thereby shortening the drying time of the circuit board.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A roller-type blind-slot wet film coating device, comprising a base (1), wherein a top cover (2) is mounted on the four corners of the upper surface of the base (1) via supporting protrusions, characterized in that, The lower surface of the top cover (2) is connected to two electric cylinders (3) respectively through two sets of screw drive components. The output end of the electric cylinder (3) faces the base (1) and is equipped with a suction cup (4). The upper surface of the base (1) is arranged horizontally in sequence with a feeding platform, a dust-adhesive roller (5), a liquid storage tank (6), a drying area and a picking platform. The drying area is equipped with a blower (7). The liquid storage tank (6) is rotatably installed with a coating roller (8) at one end near the dust-adhesive roller (5). The outer ring of the coating roller (8) is equipped with two sets of inlet rods (9) corresponding to the suction cup (4). The inlet rods (9) correspond to the blind slots of the circuit board. The rear side of the base (1) is equipped with a matching first motor (16) corresponding to the coating roller (8).

2. The roller-type blind-slot wet film coating device according to claim 1, characterized in that, The base (1) has a feeding conveyor belt (10) and a discharging conveyor belt (11) at its two ends respectively. The feeding conveyor belt (10) and the discharging conveyor belt (11) are installed at the feeding platform and the discharging platform respectively.

3. The roller-type blind-slot wet film coating device according to claim 1, characterized in that, The lead screw drive assembly includes two second motors (12), two lead screws (13), and two mounting seats (14). The electric cylinders (3) are respectively mounted on the lower surface of the corresponding mounting seats (14). The mounting seats (14) are engaged on the corresponding lead screw (13) body. The lead screw (13) is mounted on the lower surface of the top cover (2). The output end of the second motor (12) is connected to the end of the corresponding lead screw (13).

4. The roller-type blind-slot wet film coating device according to claim 3, characterized in that, The lower surface of the top cover (2) is provided with two sets of guide rails (15), each set of guide rails (15) being located on both sides of the lead screw (13).

5. The roller-type blind-slot wet film coating device according to claim 1, characterized in that, Both the dust-adhesive roller (5) and the coating roller (8) are equipped with pulleys (17) at one end extending outside the base (1), and the two pulleys (17) are connected by a belt (18).

6. The roller-type blind-slot wet film coating device according to claim 1, characterized in that, The base (1) has a cleaning zone inside corresponding to the dust-adhesive roller (5). A cylindrical cleaning brush (19) is installed on the inner bottom surface of the cleaning zone. The upper surface of the cleaning brush (19) is in contact with the outer ring surface of the dust-adhesive roller (5).

7. A roller-type blind-slot wet film coating device according to claim 6, characterized in that, A collection cylinder (20) is installed at the lower end of the dust removal area. A suction fan (21) is installed inside the collection cylinder (20). A filter plate (22) is installed at one end of the collection cylinder (20) located outside the base (1).

8. The roller-type blind-slot wet film coating device according to claim 7, characterized in that, The collecting cylinder (20) is connected to the base (1) by threads, and the cylinder body of the collecting cylinder (20) is transparent.

9. A roller-type blind-slot wet film coating device according to claim 1, characterized in that, A scraper (23) is installed at the end of the liquid storage tank (6) away from the coating roller (8). A liquid supply pipe (24) is installed on the bottom surface of the liquid storage tank (6). The lower end of the liquid supply pipe (24) extends downward at an angle to the outside of the base (1) and is equipped with a valve.

10. A roller-type blind-slot wet film coating device according to claim 1, characterized in that, The upper surface of the air-drying area is provided with a first filter plate (25), the lower end of the air-drying area extends to the outside of the base (1) and is provided with a second filter plate (26), and the interior of the air-drying area is provided with several heating rods (27).

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