Automatic spraying production line for printed circuit board

Abstract

The invention discloses a printed circuit board automatic spraying production line, which belongs to the technical field of printed circuit board production, and comprises a board feeding machine, a spraying unit, a belt conveyor, a drying unit and a board receiving machine, the belt conveyor is used for conveying the fed printed circuit board into the spraying unit for double-sided spraying, the belt conveyor conveys the sprayed printed circuit board to the drying unit for a drying process, and the board collecting machine is used for discharging and recycling the dried printed circuit board. Through the mutual cooperation of the above structures, the double-sided automatic spraying and drying process of the printed circuit board can be realized, and the spraying efficiency of the printed circuit board is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit board production, in particular to an automatic spraying production line for a printed circuit board. Background Art

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

[0003] For example, a Chinese invention patent with announcement number CN118321060A discloses an automatic spraying production line, which relates to the field of spraying processing technology. 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 rotating base, a mounting frame arranged above the rotating base, and a rotary pressing mechanism arranged on the top of the mounting frame; the rotary pressing mechanism includes: a connecting seat, a pressure 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, and a spray clamping space for accommodating the workpiece is formed between the pressure plate and the rotating base.

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

[0005] This solution adopts a rotary pressing mechanism and a rotary base to achieve the extrusion clamping of the workpiece. The pressure plate based on the rotary pressing mechanism is adaptively adjusted to meet the extrusion requirements of workpieces with different flatnesses. The rotary base cooperates with the spraying robot to perform uniform spraying processing. However, in actual use, the spraying of circuit boards usually requires a double-sided spraying process. When the above solution sprays double-sided circuit boards, it is necessary to manually turn the circuit boards over so that the other side can be sprayed, resulting in low efficiency and slow speed. Summary of the invention

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

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

[0008] A printed circuit board automatic spraying production line comprises a board feeder, a spraying unit, a belt conveyor, a drying unit and a board collector, wherein the board feeder is used for feeding printed circuit boards, the belt conveyor is used for conveying the loaded printed circuit boards to the spraying unit for double-sided spraying, the belt conveyor then conveys the sprayed printed circuit boards to the drying unit for a drying process, and the board collector is used for unloading and recycling the dried printed circuit boards; the spraying unit comprises a fuselage, a mounting seat and a driving member for driving the mounting seat to move are arranged in the fuselage, 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.

[0009] Preferably, the driving component includes linear motor 1, linear motor 2, slide and linear motor 3, the mover seat on the linear motor 1 is used to drive the linear motor 2 to move, the linear motor 2 is used to drive the slide to move, the slide is connected to linear motor three, the linear motor 3 is used to drive the mounting seat to move, and an actuator 1 for driving the mounting seat to rotate is arranged between the linear motor 3 and the mounting seat.

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

[0011] Preferably, 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 an air blowing unit for drying the printed circuit board are arranged.

[0012] Preferably, 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, both 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.

[0013] Preferably, 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.

[0014] Preferably, the blower unit comprises a plurality of air outlet hoods, each of which is provided with an air distribution plate on the air outlet side of the air outlet hood, each of which is provided with a connecting pipe at the bottom of the air outlet hood, each of which is connected to a ventilation duct at the bottom ends of the plurality of connecting pipes, 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 body at the end thereof, and each of which has an end rotatably connected to the inner wall of the drying box.

[0015] Preferably, a second motor is provided on one side of the drying box body, the output shaft of the second motor extends to the interior of the drying box body and is provided with a threaded column, a plurality of movable seats are threadedly connected to the threaded column, the plurality of movable seats are slidably connected to the inner wall of the drying box body through a slide rail, connecting rods are provided on both sides of the movable seats, connecting arms are provided at the ends of the connecting rods, 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.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention loads the printed circuit board through a board feeder, and then transports the loaded printed circuit board to a spraying unit, the nozzle first sprays one side of the printed circuit board, and then completes the clamping work of the printed circuit board with the cooperation of cylinder two and clamping plate one, the printed circuit board is turned over by controlling motor one, and then the nozzle sprays the other side of the printed circuit board, and after the spraying is completed, the belt conveyor transports the printed circuit board to the drying unit for a drying process, and the board collecting machine unloads and recycles the dried printed circuit board. Through the mutual cooperation between the above structures, automatic double-sided spraying and drying processes of the printed circuit board can be realized, and the spraying efficiency of the printed circuit board is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 3 It is a structural cross-sectional view of the spray unit of the present invention;

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

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

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

[0024] Figure 7 It is a schematic diagram of the structure of the grabbing assembly and the transmission member of the present invention;

[0025] Figure 8 This is a structural breakdown diagram of the grabbing assembly of the present invention.

[0026] In the figure:

[0027] 100. Plate feeder;

[0028] 200, spray unit; 201, fuselage; 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 hood; 403, air distribution plate; 404, connecting pipe; 405, ventilation duct; 406, hot air blower; 407, adjustment seat; 408, shaft; 409, motor 2; 410, threaded column; 411, moving seat; 412, slide rail; 413, connecting rod; 414, connecting arm; 415, adjustment arm; 416, driving roller; 417, Sprocket; 418, chain; 419, actuator 2; 420, mounting bar; 421, drive shaft; 422, mounting frame 2; 423, gear 1; 424, transmission plate; 425, fixing plate; 426, tooth groove; 427, mounting plate 2; 428, transmission rod; 429, cylinder 3; 430, clamping plate 2; 431, fixing arm; 432, gear ring; 433, gear 2; 434, heating unit;

[0031] 500. Board collecting machine. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 8 , the present invention provides a technical solution:

[0034] like Figure 1 and Figure 2As shown, 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 printed circuit boards, the belt conveyor 300 is used for conveying the loaded printed circuit boards to the spraying unit 200 for double-sided spraying, the belt conveyor 300 then conveys the sprayed printed circuit boards to the drying unit 400 for a drying process, and the board collector 500 is used for unloading and recycling the dried printed circuit boards. Through the mutual cooperation between the above structures, the double-sided automatic spraying and drying processes of the printed circuit boards can be realized, and the spraying efficiency of the printed circuit boards is effectively improved. Among them, the board feeder 100 and the board collector 500 both adopt a fully automatic board loading machine of model SMT-S0-S, which has a fully automatic transmission function, and can be selected with or without a material frame, and a single-track or double-track configuration to meet different production needs and circuit board specifications.

[0035] like Figure 3 and Figure 4 As shown, the spray unit 200 includes a body 201, a mounting seat 208 and a driving member for driving the mounting seat 208 to move are arranged in the body 201, a nozzle 209 is arranged at one end of the mounting seat 208, a mounting frame 210 is arranged at the other end of the mounting seat 208, both ends of the mounting frame 210 are rotatably connected to a mounting plate 211 through a rotating shaft, a cylinder 212 is arranged on the mounting plate 211, a clamping plate 213 is arranged at the output end of the cylinder 212, and a nozzle 209 is arranged at one side of the mounting frame 210 for driving the mounting plate 211 The rotating motor 214, when the printed circuit board is transported to the spraying unit 200, the nozzle 209 is used to spray one side of the printed circuit board with the cooperation of the driving member, and then the mounting seat 208 is rotated to make the clamping plate 213 and the printed circuit board face each other, after adjusting the distance between the clamping plate 213 and the printed circuit board, the printed circuit board is clamped with the cooperation of the cylinder 212 and the clamping plate 213, and then the motor 214 is controlled to turn the printed circuit board over, and the nozzle 209 is reset to spray the other side of the printed circuit board.

[0036] Furthermore, the driving component includes a linear motor 1 204, a linear motor 205, a slide 206 and a linear motor 3 207. The mover seat on the linear motor 1 204 is used to drive the linear motor 2 205 to move along the X-axis. The linear motor 205 is used to drive the slide 206 to move along the Y-axis. The slide 206 is connected to the linear motor 3 207. The linear motor 3 207 is used to drive the mounting seat 208 to move along the Z-axis. An actuator 1 215 for driving the mounting seat 208 to rotate is arranged between the linear motor 3 207 and the mounting seat 208.

[0037] Furthermore, the fuselage 201 is rotatably connected to a visible hood 202 and a cylinder 203 for driving the visible hood 202 to flip. The visible hood 202 can be flipped by controlling the operation of the cylinder 203, thereby facilitating maintenance and repair of the spray unit 200 by the staff.

[0038] like Figure 2 and Figure 4 As shown, the drying unit 400 includes a drying box 401, in which a heating unit 434, a plurality of grabbing components for clamping printed circuit boards, a transmission member for conveying the plurality of grabbing components, and a blowing unit for drying the printed circuit boards are arranged, wherein the heating unit 434 is arranged on the side wall of the drying box 401, and an infrared heating tube is used for heating. When the infrared ray is irradiated onto the circuit board, it will be absorbed by the circuit board and converted into heat energy, thereby achieving drying. This heating method has the advantages of fast heating speed, high thermal efficiency, strong penetration, etc., and can dry the circuit board quickly and evenly. In addition, infrared heating can also avoid damage to the circuit board due to local overheating.

[0039] like Figure 7 and Figure 8As shown, the grab assembly includes a mounting bar 420, the end of the mounting bar 420 is rotatably connected to a drive shaft 421, the end of the drive shaft 421 is provided with a second mounting frame 422, the two sides of the second mounting frame 422 are rotatably connected to a second mounting plate 427 through two transmission rods 428, and the second mounting plate 427 is provided with a clamping cylinder, and the end of one of the transmission rods 428 is provided with a second gear 433, and the top of the second gear 433 is meshed and connected with a gear ring 432, and the gear ring 432 is connected to the fixed arm 4 31 is connected with the mounting strip 420, a gear 1 423 is arranged on the driving shaft 421, a transmission plate 424 is arranged on one side of the gear 1 423, the transmission plate 424 is connected with the drying box body 401 through two fixing plates 425, a plurality of tooth grooves 426 corresponding to the gear 1 423 are opened on one side of the transmission plate 424, wherein the clamping cylinder includes a cylinder 3 429, a clamping plate 2 430 is arranged at the output end of the cylinder 3 429, and the clamping plate 2 430 is in a U-shaped structure. When the spraying is completed, When the completed printed circuit board enters the drying box 401, one of the grabbing assemblies is moved to the printed circuit board under the action of the transmission member, and then the clamping cylinder clamps the printed circuit board and moves synchronously with the grabbing assembly. When the gear 1 423 and the tooth groove 426 on the transmission plate 424 are in contact, the driving shaft 421 drives the mounting frame 2 422 and the printed circuit board to rotate in the horizontal direction. At the same time, with the cooperation of the gear 2 433 and the gear ring 432, the mounting plate 2 427 drives the cylinder 3 429, the clamping plate 2 430 and the printed circuit board to rotate in the vertical direction, so that the printed circuit board can be heated evenly and the drying effect of the printed circuit board is improved. It should be noted that a torsion spring is arranged between the driving shaft 421 and the mounting bar 420. When the grabbing assembly moves to the exit side of the drying box 401 and completes the release of the printed circuit board, the gear 1 423 and the transmission plate 424 are separated, and the torsion spring releases the elastic force to reset the cylinder 3 429 to avoid winding.

[0040] Furthermore, the transmission member includes a plurality of driving rollers 416, each of which is provided with three sprockets 417, and three chains 418 are meshedly connected to the plurality of sprockets 417, and the chains 418 are connected to the mounting strips 420, wherein the end of one of the driving rollers 416 extends out of the drying box 401 and is provided with an actuator 2 419.

[0041] like Figure 6 As shown, the blowing unit includes a plurality of air outlet hoods 402, each of which is provided with an air distribution plate 403 on the air outlet side thereof, each of which is provided with a connecting pipe 404 at the bottom thereof, each of which is connected to a ventilation duct 405 at the bottom ends thereof, each of which extends out of the drying box 401 and is provided with a hot air blower 406, each of which is provided with an adjusting seat 407, each of which has a shaft 408 at the end thereof, and each of which has an end rotatably connected to the inner wall of the drying box 401.

[0042] Furthermore, a second motor 409 is provided on one side of the drying box 401, and an output shaft of the second motor 409 extends to the interior of the drying box 401 and is provided with a threaded column 410, and a plurality of movable seats 411 are threadedly connected to the threaded column 410, and the plurality of movable seats 411 are slidably connected to the inner wall of the drying box 401 through a slide rail 412, and connecting rods 413 are provided on both sides of the movable seats 411, and connecting arms 414 are provided at the ends of the connecting rods 413, and adjusting arms 415 are rotatably connected to the ends of the connecting arms 414, and the ends of the adjusting arms 415 are respectively connected to the shaft 408.

[0043] Specifically, in order to enable the transmission parts to be in greater contact with the wind blown by the blowing unit during the process of conveying the printed circuit boards, before drying the printed circuit boards, the motor 2 409 is controlled to work according to the size of the printed circuit boards to make the threaded column 410 start to rotate, and the movable seat 411 drives the connecting rod 413 and the connecting arm 414 to move under the action of the thread, and the adjusting arm 415 drives the shaft 408 and the adjusting seat 407 to rotate under the pulling of the connecting arm 414, thereby realizing the angle adjustment of the air outlet cover 402 and changing the wind direction.

[0044] The working process of this embodiment is as follows: the printed circuit board is loaded by the board feeder 100, and then the loaded printed circuit board is transported to the spray unit 200, the nozzle 209 first sprays one side of the printed circuit board, and then the printed circuit board is clamped with the cooperation of the cylinder 212 and the clamp 1 213, the printed circuit board is turned over by controlling the motor 1 214, and then the nozzle 209 sprays the other side of the printed circuit board, and after the spraying is completed, the belt conveyor 300 transports the printed circuit board to the drying unit 400 for drying process, and the board collecting machine 500 unloads and recycles the dried printed circuit board.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 spray unit includes 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.

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 drying unit comprises a drying box body, in which a heating unit, a plurality of grabbing components for clamping a printed circuit board, a transmission member for conveying the plurality of grabbing components and an air blowing unit for drying the printed circuit board are arranged.

5. The automatic spraying production line for printed circuit boards according to claim 4 is characterized in that: 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.

6. The automatic spraying production line for printed circuit boards according to claim 5, 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 are connected to the mounting bars, and the end of one of the driving rollers extends out of the drying box and is provided with actuator 2.

7. The automatic spraying production line for printed circuit boards according to claim 4, 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.

8. The automatic spraying production line for printed circuit boards according to claim 7, 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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