An automatic spraying production line for printed circuit boards

Abstract

The present invention discloses an automatic spraying production line for printed circuit boards, belonging to the technical field of printed circuit board production, which includes a board feeder, a spraying unit, a belt conveyor, a drying unit and a board collector. The board feeder is used for loading the printed circuit boards. The belt conveyor is used for conveying the loaded printed circuit boards to the spraying unit for double-sided spraying. Then the belt conveyor conveys the printed circuit boards after spraying to the drying unit for the drying process. The board collector is used for unloading and recycling the dried printed circuit boards. Through the mutual cooperation among the above structures, the double-sided automatic spraying and drying processes of the printed circuit boards can be realized, effectively improving the spraying efficiency of the printed circuit boards.

Description

Technical Field

[0001] The present invention relates to the technical field of printed circuit board production, and specifically provides an automatic spraying production line for printed circuit boards. Background Art

[0002] A circuit board can be called a printed wiring board or a printed circuit board. Spraying waterproof glue on a circuit board is a common surface treatment process for circuit boards. It can effectively protect the circuit board from moisture, pollutants, and corrosives, and improve the service life and reliability of the circuit board. Spraying needs to be carried out on both sides of the circuit board. The existing spraying of circuit boards is through automatic reciprocating spraying. Through reciprocating movement and alternating operations, the circuit boards are sprayed in sequence.

[0003] For example, the Chinese invention patent with the publication number CN118321060A discloses an automatic spraying production line, which relates to the technical field of spraying processing. The automatic spraying production line includes: a feeding conveyor line, a discharging conveyor line, a rotary spraying part arranged between the feeding conveyor line and the discharging conveyor line, and a spraying robot arranged outside the rotary spraying part; the rotary spraying part includes: a rotary base, a mounting frame arranged above the rotary base, and a rotary pressing mechanism arranged at the top of the mounting frame; the rotary pressing mechanism includes: a connecting seat, a pressing plate arranged at the bottom of the connecting seat, and a transmission block arranged inside the connecting seat; a matching groove is arranged inside the connecting seat, and the transmission block is rotatably connected in the matching groove of the connecting seat. A spraying clamping space for accommodating the workpiece is formed between the pressing plate and the rotary base.

[0004] The above solution has the following deficiencies in actual use:

[0005] This solution uses the cooperation of a rotary pressing mechanism and a rotary base to realize the extrusion clamping of the workpiece. Based on the adaptive adjustment of the pressing plate of the rotary pressing mechanism, it fits the extrusion requirements of workpieces with different flatness. Through the cooperation of the rotary base and the spraying robot, uniform spraying processing is carried out. However, in actual use, the spraying of circuit boards usually requires a double-sided spraying process. When the above solution is used for double-sided spraying of circuit boards, it is necessary to manually turn over the circuit board to change the surface for spraying on the other side, resulting in low efficiency and slow speed. Summary of the Invention

[0006] The purpose of the present invention is to provide an automatic spraying production line for printed circuit boards to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] An automatic spraying production line for printed circuit boards, comprising a board feeder, a spraying unit, a belt conveyor, a drying unit and a board collector. The board feeder is used for loading the printed circuit boards. The belt conveyor is used for conveying the loaded printed circuit boards into the spraying unit for double-sided spraying. The belt conveyor then conveys the sprayed printed circuit boards to the drying unit for the drying process. The board collector is used for unloading and recycling the dried printed circuit boards. The spraying unit includes a body, in which there is a mounting seat and a driving member for driving the mounting seat to move. One end of the mounting seat is provided with a nozzle, and the other end of the mounting seat is provided with a mounting bracket one. Both ends of the mounting bracket one are rotatably connected with a mounting plate one through a rotating shaft. A cylinder two is arranged on the mounting plate one. The output end of the cylinder two is provided with a clamping plate one. One side of the mounting bracket one is provided with a motor one for driving the mounting plate one to rotate.

[0009] Preferably, the driving member includes a linear motor one, a linear motor two, a sliding seat and a linear motor three. The moving seat on the linear motor one is used for driving the linear motor two to move. The linear motor two is used for driving the sliding seat to move. The sliding seat is connected to the linear motor three. The linear motor three is used for driving the mounting seat to move. An actuator one for driving the mounting seat to rotate is arranged between the linear motor three and the mounting seat.

[0010] Preferably, a visual cover is rotatably connected to the body through a hinge, and a cylinder one for driving the visual cover to flip is arranged.

[0011] Preferably, the drying unit includes a drying box body, in which there is a heating unit, a plurality of grasping components for clamping the printed circuit boards, a transmission member for conveying the plurality of grasping components, and a blowing unit for drying the printed circuit boards.

[0012] Preferably, the grasping component includes a mounting strip. The end of the mounting strip is rotatably connected with a driving shaft. The end of the driving shaft is provided with a mounting bracket two. Both sides of the mounting bracket two are rotatably connected with a mounting plate two through two transmission rods. A clamping cylinder is arranged on the mounting plate two. The end of one of the transmission rods is provided with a gear two. The top of the gear two is meshed and connected with a toothed ring. The toothed ring is connected with the mounting strip through a fixed arm. A gear one is arranged on the driving shaft. One side of the gear one is provided with a transmission plate. The transmission plate is connected with the drying box body through two fixing plates. A plurality of tooth grooves corresponding to the gear one are arranged on one side of the transmission plate.

[0013] Preferably, the transmission member includes a plurality of driving rollers. Three sprockets are arranged on each of the driving rollers. Three chains are meshed and connected on the plurality of sprockets. The chains are connected with the mounting strip. The end of one of the driving rollers extends out of the drying box body and is provided with an actuator two.

[0014] Preferably, the air blowing unit includes a plurality of air outlet hoods. A air distribution plate is provided on the air outlet side of each air outlet hood. A connecting pipe is provided at the bottom of each air outlet hood. The bottom ends of the plurality of connecting pipes are connected to a ventilation duct. One end of the ventilation duct extends out of the drying box body and is provided with a hot air blower. An adjusting seat is provided on each connecting pipe. A shaft body is provided at the end of each adjusting seat. The end of the shaft body is rotatably connected to the inner wall of the drying box body.

[0015] Preferably, a second motor is provided on one side of the drying box body. The output shaft of the second motor extends into the drying box body and is provided with a threaded column. A plurality of moving seats are threadedly connected to the threaded column. The plurality of moving seats are slidably connected to the inner wall of the drying box body through slide rails. Connecting rods are provided on both sides of each moving seat. A connecting arm is provided at the end of each connecting rod. An adjusting arm is rotatably connected to the end of the connecting arm. The ends of the adjusting arms are respectively connected to the shaft bodies.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, a feeding machine is used to load the printed circuit board, and then the loaded printed circuit board is conveyed to the spraying unit. The spray head first sprays one side of the printed circuit board, and then the clamping work of the printed circuit board is completed through the cooperation of the second cylinder and the first clamping plate. By controlling the first motor to work, the printed circuit board is flipped, and then the spray head sprays the other side of the printed circuit board. After spraying, the belt conveyor conveys the printed circuit board to the drying unit for the drying process, and the receiving machine unloads and recycles the dried printed circuit board. Through the mutual cooperation of the above structures, the double-sided automatic spraying and drying processes of the printed circuit board can be realized, effectively improving the spraying efficiency of the printed circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0019] Figure 2 is a sectional view of the whole structure of the present invention;

[0020] Figure 3 is a sectional view of the structure of the spraying unit of the present invention;

[0021] Figure 4 is a schematic diagram of the internal structure of the spraying unit of the present invention;

[0022] Figure 5 is a schematic diagram of the internal structure of the drying unit of the present invention;

[0023] Figure 6 is a schematic diagram of the structure of the air blowing unit of the present invention;

[0024] Figure 7 Structural schematic diagram of the grasping component and the transmission part of the present invention;

[0025] Figure 8 Exploded view of the structure of the grasping component of the present invention.

[0026] In the figure:

[0027] 100, Plate feeder;

[0028] 200, Spraying unit; 201, Body; 202, Visual cover; 203, Cylinder 1; 204, Linear motor 1; 205, Linear motor 2; 206, Slide; 207, Linear motor 3; 208, Mounting seat; 209, Nozzle; 210, Mounting frame 1; 211, Mounting plate 1; 212, Cylinder 2; 213, Clamping plate 1; 214, Motor 1; 215, Actuator 1;

[0029] 300, Belt conveyor;

[0030] 400, Drying unit; 401, Drying box; 402, Air outlet cover; 403, Air distribution plate; 404, Connecting pipe; 405, Ventilation duct; 406, Hot air blower; 407, Adjusting seat; 408, Shaft body; 409, Motor 2; 410, Threaded column; 411, Moving seat; 412, Slide rail; 413, Connecting rod; 414, Connecting arm; 415, Adjusting arm; 416, Driving roller; 417, Sprocket; 418, Chain; 419, Actuator 2; 420, Mounting strip; 421, Driving shaft; 422, Mounting frame 2; 423, Gear 1; 424, Transmission plate; 425, Fixed plate; 426, Tooth groove; 427, Mounting plate 2; 428, Transmission rod; 429, Cylinder 3; 430, Clamping plate 2; 431, Fixed arm; 432, Tooth ring; 433, Gear 2; 434, Heating unit;

[0031] 500, Plate collector. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 - 8 , the present invention provides a technical solution:

[0034] As Figure 1 and Figure 2As shown in the figure, an automatic spraying production line for printed circuit boards includes a board feeder 100, a spraying unit 200, a belt conveyor 300, a drying unit 400, and a board collector 500. The board feeder 100 is used for loading the printed circuit boards. The belt conveyor 300 is used to transport the loaded printed circuit boards into the spraying unit 200 for double-sided spraying. Then, the belt conveyor 300 transports the sprayed printed circuit boards to the drying unit 400 for the drying process. The board collector 500 is used for unloading and recycling the dried printed circuit boards. Through the mutual cooperation among the above structures, the double-sided automatic spraying and drying processes of the printed circuit boards can be realized, effectively improving the spraying efficiency of the printed circuit boards. Among them, both the board feeder 100 and the board collector 500 adopt fully automatic board loading machines of model smt-s0-s, which have a fully automatic transmission function and can be configured with or without a material frame, as well as single-track or double-track configurations to meet different production requirements and circuit board specifications.

[0035] As Figure 3 and Figure 4 As shown in the figure, the spraying unit 200 includes a body 201. Inside the body 201, there is a mounting seat 208 and a driving member for driving the movement of the mounting seat 208. One end of the mounting seat 208 is provided with a spray head 209, and the other end of the mounting seat 208 is provided with a first mounting frame 210. Both ends of the first mounting frame 210 are rotatably connected to a first mounting plate 211 through a rotating shaft. A second cylinder 212 is arranged on the first mounting plate 211, and a first clamping plate 213 is arranged at the output end of the second cylinder 212. A first motor 214 for driving the rotation of the first mounting plate 211 is arranged on one side of the first mounting frame 210. After the printed circuit board is transported into the spraying unit 200, the spray head 209 sprays one side of the printed circuit board under the cooperation of the driving member. Then, the mounting seat 208 rotates to make the first clamping plate 213 face the printed circuit board. After adjusting the distance between the first clamping plate 213 and the printed circuit board, the clamping work of the printed circuit board is completed under the cooperation of the second cylinder 212 and the first clamping plate 213. Then, the first motor 214 is controlled to work to flip the printed circuit board, and after the spray head 209 is reset, the other side of the printed circuit board is sprayed.

[0036] Furthermore, the driving member includes a first linear motor 204, a second linear motor 205, a sliding seat 206, and a third linear motor 207. The moving seat on the first linear motor 204 is used to drive the second linear motor 205 to move along the X-axis. The second linear motor 205 is used to drive the sliding seat 206 to move along the Y-axis. The sliding seat 206 is connected to the third linear motor 207, and the third linear motor 207 is used to drive the mounting seat 208 to move along the Z-axis. An actuator one 215 for driving the rotation of the mounting seat 208 is arranged between the third linear motor 207 and the mounting seat 208.

[0037] Further, a visual cover 202 is rotatably connected to the fuselage 201 through a hinge, and a first cylinder 203 for driving the visual cover 202 to flip is provided. By controlling the operation of the first cylinder 203, the visual cover 202 can be flipped, facilitating the maintenance and repair of the spraying unit 200 by the staff.

[0038] As Figure 2 and Figure 4 shown, the drying unit 400 includes a drying box body 401. Inside the drying box body 401, a heating unit 434, a plurality of grasping components for clamping the printed circuit board, a transmission member for conveying the plurality of grasping components, and a blowing unit for drying the printed circuit board are provided. Among them, the heating unit 434 is arranged on the side wall of the drying box body 401 and generates heat by using an infrared heating tube. When the infrared rays irradiate on the circuit board, they will be absorbed by the circuit board and converted into heat energy, thereby realizing drying. This heating method has the advantages of fast heating speed, high thermal efficiency, strong penetrability, etc., and can dry the circuit board quickly and evenly. In addition, infrared heating can also avoid damaging the circuit board due to local overheating.

[0039] As Figure 7 and Figure 8As shown in the figure, the grasping assembly includes a mounting bar 420. The end of the mounting bar 420 is rotatably connected to a driving shaft 421. The end of the driving shaft 421 is provided with a second mounting bracket 422. Both sides of the second mounting bracket 422 are rotatably connected to a second mounting plate 427 through two transmission rods 428. A clamping cylinder is arranged on the second mounting plate 427. The end of one of the transmission rods 428 is provided with a second gear 433. The top of the second gear 433 is meshed and connected with a toothed ring 432. The toothed ring 432 is connected to the mounting bar 420 through a fixed arm 431. A first gear 423 is arranged on the driving shaft 421. One side of the first gear 423 is provided with a transmission plate 424. The transmission plate 424 is connected to the drying box body 401 through two fixing plates 425. A number of tooth grooves 426 corresponding to the first gear 423 are formed on one side of the transmission plate 424. Among them, the clamping cylinder includes a third cylinder 429. The output end of the third cylinder 429 is provided with a second clamping plate 430. The second clamping plate 430 is of a U-shaped structure. When the printed circuit board after spraying enters the drying box body 401, under the action of the transmission member, one of the grasping assemblies moves to the position of the printed circuit board. Then, the clamping cylinder clamps the printed circuit board and moves synchronously with the grasping assembly. When the first gear 423 comes into contact with the tooth grooves 426 on the transmission plate 424, the driving shaft 421 drives the second mounting bracket 422 and the printed circuit board to rotate in the horizontal direction. At the same time, under the cooperation of the second gear 433 and the toothed ring 432, the second mounting plate 427 drives the third cylinder 429, the second clamping plate 430 and the printed circuit board to rotate in the vertical direction. Thus, the printed circuit board can be heated evenly, improving the drying effect on the printed circuit board. It should be noted that a torsion spring is arranged between the driving shaft 421 and the mounting bar 420. When the grasping assembly moves to the outlet side of the drying box body 401 and completes the release work of the printed circuit board, the first gear 423 is separated from the transmission plate 424, and the torsion spring releases the elastic force to reset the third cylinder 429, avoiding the phenomenon of winding.

[0040] Further, the transmission member includes a plurality of driving rollers 416. Three sprockets 417 are arranged on each of the driving rollers 416. Three chains 418 are meshed and connected to the plurality of sprockets 417. The chain 418 is connected to the mounting bar 420. The end of one of the driving rollers 416 extends out of the drying box body 401 and is provided with a second actuator 419.

[0041] As Figure 6 shown, the air blowing unit includes a plurality of air outlet covers 402. Air distribution plates 403 are arranged on the air outlet sides of the air outlet covers 402. Connection pipes 404 are arranged at the bottoms of the air outlet covers 402. The bottoms of the plurality of connection pipes 404 are connected to a ventilation duct 405. One end of the ventilation duct 405 extends out of the drying box body 401 and is provided with a hot air blower 406. Adjusting seats 407 are arranged on the connection pipes 404. Shaft bodies 408 are arranged at the ends of the adjusting seats 407. The ends of the shaft bodies 408 are rotatably connected to the inner wall of the drying box body 401.

[0042] Further, a second motor 409 is provided on one side of the drying box body 401. The output shaft of the second motor 409 extends into the drying box body 401 and is provided with a threaded column 410. A plurality of moving seats 411 are threadedly connected to the threaded column 410. The plurality of moving seats 411 are slidably connected to the inner wall of the drying box body 401 through slide rails 412. Connecting rods 413 are provided on both sides of the moving seat 411. Connecting arms 414 are provided at the ends of the connecting rods 413. Adjusting arms 415 are rotatably connected to the ends of the connecting arms 414. The ends of the adjusting arms 415 are respectively connected to the shaft body 408.

[0043] Specifically, in order to enable the printed circuit board to come into more contact with the air blown out by the air blowing unit during the conveying process of the transmission part, before drying the printed circuit board, control the second motor 409 to work to make the threaded column 410 start to rotate according to the size of the printed circuit board. Under the action of the thread, the moving seat 411 drives the connecting rod 413 and the connecting arm 414 to move. Under the pulling of the connecting arm 414, the adjusting arm 415 drives the shaft body 408 and the adjusting seat 407 to rotate, so as to realize the angle adjustment of the air outlet hood 402 and change the wind direction.

[0044] The working process of this embodiment is as follows: The printed circuit board is loaded through the board feeder 100, and then the loaded printed circuit board is conveyed to the spraying unit 200. The spray head 209 first sprays one side of the printed circuit board, and then completes the clamping work of the printed circuit board under the cooperation of the second cylinder 212 and the first clamping plate 213. Control the first motor 214 to work to turn over the printed circuit board, and then the spray head 209 sprays the other side of the printed circuit board. After spraying, the belt conveyor 300 conveys the printed circuit board to the drying unit 400 for the drying process, and the board collector 500 unloads and recovers the dried printed circuit board.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A printed circuit board automatic spraying production line, characterized in that: It includes a board feeder, a spraying unit, a belt conveyor, a drying unit and a board collector. The board feeder is used to feed the printed circuit board. The belt conveyor is used to transport the loaded printed circuit board to the spraying unit for double-sided spraying. The belt conveyor then transports the sprayed printed circuit board to the drying unit for drying. The board collector is used to unload and recycle the dried printed circuit board. The spraying unit comprises a body, a mounting seat and a driving member for driving the mounting seat to move are arranged in the body, a nozzle is arranged at one end of the mounting seat, a mounting frame 1 is arranged at the other end of the mounting seat, both ends of the mounting frame 1 are rotatably connected with a mounting plate 1 through a rotating shaft, a cylinder 2 is arranged on the mounting plate 1, a clamping plate 1 is arranged at the output end of the cylinder 2, and a motor 1 for driving the mounting plate 1 to rotate is arranged on one side of the mounting frame 1; The drying unit comprises a drying box, in which a heating unit, a plurality of grabbing components for clamping the printed circuit board, a transmission member for conveying the plurality of grabbing components, and a blasting unit for drying the printed circuit board are arranged; The grabbing assembly includes a mounting bar, the end of the mounting bar is rotatably connected to a driving shaft, the end of the driving shaft is provided with a mounting frame 2, the two sides of the mounting frame 2 are rotatably connected to a mounting plate 2 through two transmission rods, a clamping cylinder is provided on the mounting plate 2, one end of one of the transmission rods is provided with a gear 2, the top of the gear 2 is meshed and connected with a gear ring, the gear ring is connected to the mounting bar through a fixed arm, a gear 1 is provided on the driving shaft, a transmission plate is provided on one side of the gear 1, the transmission plate is connected to the drying box through two fixed plates, and a plurality of tooth grooves corresponding to the gear 1 are opened on one side of the transmission plate.

2. The automatic spraying production line for printed circuit boards according to claim 1 is characterized in that: The driving component includes linear motor 1, linear motor 2, slide and linear motor 3. The mover seat on linear motor 1 is used to drive linear motor 2 to move. Linear motor 2 is used to drive the slide to move. The slide is connected to linear motor three phases. Linear motor 3 is used to drive the mounting seat to move. An actuator 1 for driving the mounting seat to rotate is arranged between linear motor 3 and the mounting seat.

3. The automatic spraying production line for printed circuit boards according to claim 1 is characterized in that: The body is rotatably connected with a visual cover and a cylinder 1 for driving the visual cover to flip.

4. The automatic spraying production line for printed circuit boards according to claim 1 is characterized in that: The transmission member includes a plurality of driving rollers, each of which is provided with three sprockets, and the plurality of sprockets are meshed with three chains connected thereto, the chains being connected to the mounting bars, wherein the end of one of the driving rollers extends out of the drying box and is provided with actuator 2.

5. The automatic spraying production line for printed circuit boards according to claim 1 is characterized in that: The blower unit includes a plurality of air outlet hoods, each of which is provided with an air distribution plate on the air outlet side, each of which is provided with a connecting pipe at the bottom, each of which is connected to a ventilation duct at the bottom ends, each of which extends out of the drying box and is provided with a hot air blower, each of which is provided with an adjusting seat, each of which has a shaft at the end thereof, and each of which has an end rotatably connected to the inner wall of the drying box.

6. The automatic spraying production line for printed circuit boards according to claim 5, characterized in that: A second motor is provided on one side of the drying box body, and an output shaft of the second motor extends to the interior of the drying box body and is provided with a threaded column, and a plurality of movable seats are threadedly connected to the threaded column, and the plurality of movable seats are slidably connected to the inner wall of the drying box body through a slide rail, and connecting rods are provided on both sides of the movable seats, and connecting arms are provided at the ends of the connecting rods, and the ends of the connecting arms are rotatably connected to adjusting arms, and the ends of the adjusting arms are respectively connected to the shaft bodies.

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