Automatic coating device for side surface of circuit board

Abstract

The invention provides a circuit board side face automatic coating device which comprises a circuit board conveying line and a coating combined part, the coating combined part is provided with a plate feeding detection combined part, a coating roller combined part, a coating roller driving combined part and a coating compensation combined part, and the plate feeding detection combined part comprises a feeding positioning plate and a feeding detection movable set. The feeding detection movable group moves left and right on the circuit board conveying line, the coating roller driving assembly respectively drives the coating roller fixed group and the coating roller movable group of the coating roller assembly to vertically rotate, the coating roller fixed group is positioned and mounted on the left side of the coating compensation assembly, and the coating roller driving assembly is provided with a width self-adaptive driving assembly. The printing ink coating device is adaptive to circuit boards of different sizes, can coat printing ink on the left and right side surfaces simultaneously, is high in coating efficiency and automation degree and high in applicability, and ensures the appearance and the service life of a product in use.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board processing equipment, and specifically relates to an automatic side coating device for circuit boards. Background Art

[0002] Currently, in the production of existing circuit boards, in order to reduce costs, only the surface of the circuit board is coated with ink. The coating roller of the coating machine for coating the surface of the circuit board is horizontally arranged, so the length of the coating roller is set relatively wide. When the circuit board is conveyed close to the coating roller, the circuit board is first aligned to the middle position of the circuit board conveying line, and then the surface of circuit boards with different widths can be coated. The coating machine for coating the surface of the circuit board cannot coat the side of the circuit board. When the substrate of the circuit board is etched with an alkaline etching solution, the side of the circuit board will not be corroded. However, when it is etched with an acidic etching solution, the side of the circuit board will be corroded, affecting the appearance and service life of the circuit board.

[0003] Based on this, the present invention designs an automatic side coating device for circuit boards to solve the above problems. Summary of the Invention

[0004] The invention purpose of the present invention is to overcome the deficiencies of the prior art and provide an automatic side coating device for circuit boards, which has a simple structure, can adaptively coat the left and right sides of circuit boards with different sizes with ink, has high coating efficiency and automation degree, strong applicability, and can ensure the appearance and service life of the product during use.

[0005] The invention purpose of the present invention is realized as follows: An automatic side coating device for circuit boards includes a circuit board conveying line and a coating combination component. The coating combination component is provided with a plate feeding detection combination component, a coating roller combination component, a coating roller driving combination component, and a coating compensation combination component. The plate feeding detection combination component includes feeding positioning plates and a feeding detection activity group arranged on the left and right sides of the feeding end of the circuit board conveying line. The feeding detection activity group moves left and right on the circuit board conveying line according to the width of the circuit board. The coating roller combination component includes a coating roller fixed group and a coating roller activity group. The coating roller driving combination component respectively drives the coating roller fixed group and the coating roller activity group to rotate vertically relative to the circuit board conveying line. The coating roller fixed group is fixedly installed on the left side of the coating compensation combination component. The coating roller driving combination component is provided with a width adaptive driving component for the coating roller activity group to move left and right on the right side of the coating compensation combination component according to the moving position of the feeding detection activity group.

[0006] Optimized according to the above, the coating compensation combination component is arranged at the discharging position of the plate feeding detection combination component and can move up and down on the circuit board conveying line.

[0007] Optimized according to the above, the coating compensation assembly includes a left paint storage box, a right paint storage box, a pumping pump, a first motor, and a lifting frame. The first motor is installed on one side of the circuit board conveyor line, and the rotating shaft of the first motor is connected to the lifting frame. The fixed coating roller group is vertically rotatably connected to the left side of the lifting frame, and the movable coating roller group is rotatably connected to the right side of the lifting frame while moving left and right relative to the lifting frame. The left paint storage box and the right paint storage box are respectively communicated with the feeding ends of the corresponding pumping pumps, and the fixed coating roller group and the movable coating roller group are respectively communicated with the discharging ends of the left paint storage box and the right paint storage box.

[0008] Optimized according to the above, the left paint storage box is fixed on the left side of the lifting frame, and the right paint storage box is movably connected to the right side of the lifting frame. The fixed coating roller group is vertically rotatably connected to the left paint storage box, and the movable coating roller group is vertically rotatably connected to the right paint storage box.

[0009] Optimized according to the above, the width adaptive driving assembly includes a width adaptive driving cylinder, a guide block, and a moving block. The moving block is installed with a movable coating roller group. The coating compensation assembly is installed with a lifting frame that is adapted to the moving block and can be horizontally movably connected at the top. The guide block is horizontally arranged at the bottom of the lifting frame. The guide block is slidably connected to the right paint storage box. The width adaptive driving cylinder is installed on one side of the lifting frame and its push rod is connected to the right paint storage box. The movable coating roller group is rotatably connected to the right paint storage box through a rotating shaft.

[0010] Optimized according to the above, coating roller protection plates for facilitating the feeding of the circuit board are respectively provided at the feeding ends of the fixed coating roller group and the movable coating roller group. The coating roller protection plates are inclinedly installed on the lifting frame from the feeding end towards the fixed coating roller group and the movable coating roller group.

[0011] Optimized according to the above, inclined surfaces for facilitating the reception of ink are respectively provided at the ends of the fixed coating roller group and the movable coating roller group.

[0012] Optimized according to the above, the feeding detection movable group includes a feeding alignment plate, a guide frame, and a feeding alignment driving cylinder. The feeding positioning plate is installed on the left side of the circuit board conveyor line. The guide frame is installed at the bottom of the circuit board conveyor line. The feeding alignment plate is slidably connected to the guide frame. The feeding alignment driving cylinder is installed on the circuit board conveyor line and its push rod is connected to the feeding alignment plate.

[0013] Optimized according to the above, a lifting baffle component for equally spacing and feeding the circuit board is provided at the discharging end of the plate feeding and detecting assembly. The lifting baffle component includes a lifting baffle and a baffle driving cylinder. The baffle driving cylinder is installed at the bottom of the circuit board conveying line. The lifting baffle is connected to the push rod of the baffle driving cylinder and moves up and down through the baffle driving cylinder at the discharging end of the plate feeding and detecting assembly. The feeding board detecting inductor is arranged at the feeding end of the plate feeding and detecting assembly and is signal-connected to the baffle driving cylinder, the width self-adaptive driving cylinder, and the feeding alignment driving cylinder.

[0014] Optimized according to the above, a rotating device for rotating the circuit board for coating the other two side surfaces is further provided on the circuit board conveying line (1). The rotating device includes a supporting plate, a supporting cylinder, a fourth motor, and a rotating inductor. The fourth motor is installed at the bottom of the circuit board conveying line. The supporting cylinder is installed on the output shaft of the fourth motor, and a supporting plate is installed on the push rod of the supporting cylinder. The rotating inductor is arranged on the front side of the fourth motor and is signal-connected to the supporting cylinder.

[0015] The advantages of the present invention are as follows:

[0016] 1) Through the structural cooperation of the coating roller assembly and the coating roller driving assembly, the left and right side surfaces of the circuit board can be simultaneously coated with ink, with high coating efficiency and automation degree. At the same time, in cooperation with the structure of the coating compensation assembly, the coating roller assembly can move up and down to uniformly coat the ink, improving the processing quality.

[0017] 2) Through the setting of the plate feeding and detecting assembly, the width of the feeding circuit board can be detected to control the processing width of the coating roller assembly, so as to adapt to the coating of the left and right side surfaces of circuit boards of different sizes, with high stability and strong applicability. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present invention.

[0019] Figure 2 It is a partial cutting schematic diagram of a preferred embodiment of the present invention.

[0020] Figure 3 It is a partial cutting schematic diagram of another angle of a preferred embodiment of the present invention.

[0021] Figure 4 It is a cross-sectional view of a preferred embodiment of the present invention.

[0022] Figure 5 It is a schematic structural diagram of the lifting baffle component of a preferred embodiment of the present invention.

[0023] Figure 6 It is a schematic structural diagram of the rotating device of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] According to the attached Figures 1 to 6 As shown, the circuit board side automatic coating device of the present invention comprises a circuit board conveyor line 1 and a coating assembly, wherein the coating assembly is provided with a plate feeding detection assembly 2, a coating roller assembly 3, a coating roller driving assembly 4, and a coating compensation assembly 5. The plate feeding detection assembly 2 comprises a feeding positioning plate 21 and a feeding detection movable group arranged on the left and right sides of the feeding end of the circuit board conveyor line 1, wherein the feeding detection movable group moves left and right on the circuit board conveyor line 1 according to the width of the circuit board, and the coating roller assembly 3 comprises a coating roller fixed group 31 and a coating roller movable group 32. The coating roller driving assembly 4 drives the coating roller fixed group 31 and the coating roller movable group 32 to rotate vertically relative to the circuit board conveyor line 1 respectively, and the coating roller fixed group 31 is positioned and installed on the left side of the coating compensation assembly 5, and the coating roller driving assembly 4 is provided with a width adaptive driving component 6 for the coating roller movable group 32 to move left and right on the right side of the coating compensation assembly 5 according to the moving position of the feeding detection movable group.

[0026] In practical applications, the circuit board conveyor line 1 of this structure is installed with a processor connected to the board feeding detection assembly 2, the coating roller assembly 3, the coating roller drive assembly 4, the coating compensation assembly 5, and the width adaptive drive assembly 6 and controlling their operating sequence.

[0027] The coating roller drive assembly 4 further includes a second motor 41 and a third motor 42, which are respectively mounted on the lifting frame 55 of the coating compensation assembly 5, and the coating roller fixed group 31 and the coating roller movable group 32 are each provided with two groups of coating rollers, each group of coating rollers is two coating rollers in contact with each other, one of the coating rollers is provided with a pulley on the rotating shaft, and the two pulleys are connected by a conveyor belt, and the rotating shafts of the second motor 41 and the third motor 42 are respectively connected by a transmission with the rotating shaft of one of the coating rollers provided with a pulley. In this way, when starting, the processor controls the operation of the second motor 41 and the third motor 42 respectively, and the second motor 41 and the third motor 42 respectively drive the coating roller fixed group 31 and the coating roller movable group 32 to rotate vertically on the left and right sides of the circuit board conveyor line 1; thereby realizing the ink coating processing on the left and right sides of the circuit board at the same time, with high coating efficiency and automation, and at the same time, in conjunction with the structure of the coating compensation assembly 5, the coating roller assembly can be moved up and down, and the ink is evenly coated to improve the processing quality.

[0028] Reference Figures 1 to 6As shown in the figure, for further refinement, the coating compensation assembly 5 is arranged at the discharging position of the plate feeding detection assembly 2 and can move up and down on the circuit board conveying line 1. Among them, the coating compensation assembly 5 includes a left paint storage box 51, a right paint storage box 52, a pumping pump 53, a first motor 54, and a lifting frame 55. The first motor 54 is installed on one side of the circuit board conveying line 1, and the rotating shaft of the first motor 54 is connected to the lifting frame 55. Specifically, an external thread is provided at the front end of the rotating shaft, and a sleeve is provided on the lifting frame 55. The sleeve is provided with an internal thread that is screwed with the external thread of the rotating shaft. When the rotating shaft of the first motor 54 rotates, the lifting frame 55 will be driven to lift. The fixed coating roller group 31 is rotatably connected vertically and positionally on the left side of the lifting frame 55, and the movable coating roller group 32 is rotatably connected on the right side of the lifting frame 55 and moves left and right relative to the lifting frame 55. The left paint storage box 51 and the right paint storage box 52 are respectively communicated with the feeding ends of the corresponding pumping pumps 53, and the fixed coating roller group 31 and the movable coating roller group 32 are respectively communicated with the discharging ends of the left paint storage box 51 and the right paint storage box 52.

[0029] In practical applications, the left paint storage box 51 is fixed on the left side of the lifting frame 55, and the right paint storage box 52 is movably connected to the right side of the lifting frame 55. The fixed coating roller group 31 is rotatably connected vertically to the left paint storage box 51, and the movable coating roller group 32 is rotatably connected vertically to the right paint storage box 52.

[0030] After the coating device operates for a certain period of time, the surfaces of the coating rollers on the fixed coating roller group 31 and the movable coating roller group 32 will be worn (the diameter becomes smaller). The processor will respectively control the first motor 54 to act to drive the lifting frame 55 to move downward, so as to drive the fixed coating roller group 31 and the movable coating roller group 32 to move downward by a certain distance at the same time, so that the uncoated parts of each coating roller can be coated. By repeating this process, the entire surface of the coating roller can be used for coating, effectively reducing the replacement cycle of the coating roller and saving costs.

[0031] Among them, coating roller protection plates 33 for facilitating the feeding of the circuit board are respectively provided at the feeding ends of the fixed coating roller group 31 and the movable coating roller group 32. The coating roller protection plates 33 are installed on the lifting frame 55 obliquely from the feeding end towards the fixed coating roller group 31 and the movable coating roller group 32.

[0032] Under the action of the coating roller protection plates 33, it is convenient for the circuit board to be fed, and it can also reduce the direct contact between the circuit board and the fixed coating roller group 31 and the movable coating roller group 32 during feeding, effectively protecting the coating rollers and extending the service life of the coating rollers.

[0033] Moreover, inclined surfaces 34 for facilitating the reception of ink are respectively provided at the ends of the fixed coating roller group 31 and the movable coating roller group 32.

[0034] Under the action of the inclined plane 34, the ink can evenly flow onto the surfaces of the fixed coating roller group 31 and the movable coating roller group 32.

[0035] Refer to Figures 1 to 6 As shown, in further detail, the width adaptive driving assembly 6 includes a width adaptive driving cylinder 61, a guiding block 62, and a moving block 63. The moving block 63 is installed with the movable coating roller group 32. The coating compensation assembly 5 is installed with a lifting frame 55 that is adapted to be horizontally movably connected to the moving block 63 at the top. The guiding block 62 is horizontally arranged at the bottom of the lifting frame 55. The guiding block 62 is slidably connected to the right paint storage box 52. The width adaptive driving cylinder 61 is installed on one side of the lifting frame 55 and its push rod is connected to the right paint storage box 52. The movable coating roller group 32 is rotatably connected to the right paint storage box 52 through a rotating shaft.

[0036] Refer to Figures 1 to 6 As shown, in further detail, the feeding detection movable group includes a feeding alignment plate 22, a guiding frame 23, and a feeding alignment driving cylinder 24. The feeding positioning plate 21 is installed on the left side of the circuit board conveying line 1. The guiding frame 23 is installed at the bottom of the circuit board conveying line 1. The feeding alignment plate 22 is slidably connected to the guiding frame 23. The feeding alignment driving cylinder 24 is installed on the circuit board conveying line 1 and its push rod is connected to the feeding alignment plate 22.

[0037] Among them, a lifting baffle component 7 for feeding the circuit boards at equal intervals is provided at the discharge end of the plate feeding detection assembly 2. The lifting baffle component 7 includes a lifting baffle 71, a baffle driving cylinder 72, and a board feeding detection sensor 73. The baffle driving cylinder 72 is installed at the bottom of the circuit board conveying line 1. The lifting baffle 71 is connected to the push rod of the baffle driving cylinder 72 and moves up and down through the baffle driving cylinder 72 at the discharge end of the plate feeding detection assembly 2. The board feeding detection sensor 73 is provided at the feeding end of the plate feeding detection assembly 2 and is signal-connected to the feeding alignment driving cylinder 24, the width adaptive driving cylinder 61, and the baffle driving cylinder 72.

[0038] During operation, the circuit board to be processed moves along the circuit board conveyor 1 towards the coating roller assembly 3. The board feeding detection sensor 73 detects the circuit board workpiece and feeds the corresponding information back to the processor. The processor controls the actions of the feeding alignment drive cylinder 24 and the baffle drive cylinder 72 respectively. The baffle drive cylinder 72 drives the lifting baffle 71 to rise, causing the processed circuit board to closely adhere to the lifting baffle 71. At the same time, the feeding alignment drive cylinder 24 drives the feeding alignment plate 22 to move along the guide frame 23 towards the feeding positioning plate 21, pushing the circuit board towards the feeding positioning plate 21. After the circuit board is aligned, the processor controls the baffle drive cylinder 72 to act, causing the lifting baffle 71 to descend, allowing the circuit board to continue moving forward towards the coating roller assembly 3. Subsequently, the processor controls the width adaptive drive cylinder 61 of the width adaptive drive assembly 6 to act. The width adaptive drive cylinder 61 pushes the right paint storage box 52 towards the left paint storage box 51. The movement of the right paint storage box 52 towards the left paint storage box 51 also drives the coating roller movable group 32 to move towards the coating roller fixed group 31 to adapt to the width of the circuit board to be processed. Thus, the coating roller movable group 32 and the coating roller fixed group 31 can simultaneously contact the sides of the circuit board to coat the sides of the circuit board. Through the structural cooperation of the board feeding detection assembly 2 and the width adaptive drive assembly 6, the width of the incoming circuit board can be detected. The processor generates a control signal based on the detected circuit board width information to control the distance that the coating roller movable group 32 moves towards the coating roller fixed group 31, so as to automatically adapt to the coating of the left and right sides of circuit boards of different sizes with ink. It has high stability and strong applicability.

[0039] During this period, under the action of the lifting baffle component 7, the previous processed circuit board moves from the discharge end of the board feeding detection assembly 2 to the coating roller assembly 3. Subsequently, the next processed circuit board enters the board feeding detection assembly 2. When the board feeding detection sensor 73 detects the subsequent processed circuit board, it feeds the information back to the processor. The processor controls the baffle drive cylinder 72 to act, driving the lifting baffle 71 to rise, thereby restricting the forward conveyance of the subsequent processed circuit board. When the previous processed circuit board has completed the ink coating process in the coating roller assembly 3 and is conveyed to the next process, the board feeding detection sensor 73 sends the corresponding information to the processor. The processor controls the baffle drive cylinder 72 to act, driving the lifting baffle 71 to descend, enabling the subsequent processed circuit board to continue moving along the circuit board conveyor 1 towards the coating roller assembly 3.

[0040] Under the action of the lifting baffle component 7, the circuit board is coated with ink at equal intervals, with a stable structure, smooth operation, and improved processing quality.

[0041] In the optimization solution, there are two coating combination components provided on the circuit board conveyor line 1, and a rotating device 8 for rotating the circuit board for coating the other two side surfaces of the circuit board. The rotating device 8 is arranged between the two coating combination components. The rotating device 8 includes a support plate 81, a support cylinder 82, a fourth motor 83, and a rotation inductor 84. The fourth motor 83 is installed at the bottom of the circuit board conveyor line 1. The support cylinder 82 is installed on the output shaft of the fourth motor 83 through a support seat, and a support plate 81 is installed on the push rod of the support cylinder 82. The rotation inductor 84 is arranged on the front side of the fourth motor 83 and is signal-connected to the support cylinder 82.

[0042] When the two sides of the circuit board have been coated with ink through one of the coating combination components, the circuit board enters the rotating device 8 along with the circuit board conveyor line 1. When the rotation inductor 84 detects the semi-finished circuit board, the rotation inductor 84 feeds back the corresponding information to the processor. The processor controls the support cylinder 82 to act, driving the support plate 81 to rise, thereby lifting the semi-finished circuit board from the circuit board conveyor line 1. Then, the fourth motor 83 acts, and the rotating shaft of the fourth motor 83 drives the support cylinder 82 and the support plate 81 to rotate 90 degrees together and then stop rotating, so that the semi-finished circuit board rotates 90 degrees. The support cylinder 82 resets and descends, so that the semi-finished circuit board descends to the circuit board conveyor line 1, and the semi-finished circuit board is conveyed along with the circuit board conveyor line 1 in the direction of another coating combination component at the back, realizing the coating of ink on the other two sides of the semi-finished circuit board. It has intelligent operation, stable structure, and smooth operation.

[0043] The specific embodiments are only the specific implementation manners with better effects of the present invention. Any structures identical or equivalent to the side automatic coating device of the circuit board of the present invention are within the protection scope of the present invention.

Claims

1. An automatic coating device for the side of a circuit board, comprising a circuit board conveying line (1) and a coating combination component, characterized in that: The coating combination component is provided with a plate feeding detection assembly (2), a coating roller assembly (3), a coating roller driving assembly (4), and a coating compensation assembly (5). The plate feeding detection assembly (2) includes feeding positioning plates (21) arranged on the left and right sides of the feeding end of the circuit board conveyor line (1), and a feeding detection movable group. The feeding detection movable group moves left and right on the circuit board conveyor line (1) according to the width of the circuit board. The coating roller assembly (3) includes a coating roller fixed group (31) and a coating roller movable group (32). The coating roller driving assembly (4) drives the coating roller fixed group (31) and the coating roller movable group (32) to rotate vertically relative to the circuit board conveyor line (1). The coating roller fixed group (31) is positioned and installed on the left side of the coating compensation assembly (5). The coating roller driving assembly (4) is provided with a width adaptive driving assembly (6) for the coating roller movable group (32) to move left and right on the right side of the coating compensation assembly (5) according to the moving position of the feeding detection movable group.

2. The automatic coating device for the side of the circuit board according to claim 1, wherein: The coating compensation assembly (5) is arranged at the discharge position of the plate feeding detection assembly (2) and can move up and down on the circuit board conveyor line (1).

3. The automatic coating device for the side of the circuit board according to claim 1 or 2, characterized in that: The coating compensation assembly (5) includes a left paint storage box (51), a right paint storage box (52), a pumping pump (53), a first motor (54), and a lifting frame (55). The first motor (54) is installed on one side of the circuit board conveyor line (1), and the rotating shaft of the first motor (54) is connected to the lifting frame (55). The coating roller fixed group (31) is positioned and vertically rotatably connected to the left side of the lifting frame (55). The coating roller movable group (32) is rotatably connected to the right side of the lifting frame (55) and moves left and right relative to the lifting frame (55). The left paint storage box (51) and the right paint storage box (52) are respectively communicated with the feeding ends of the corresponding pumping pumps (53). The coating roller fixed group (31) and the coating roller movable group (32) are respectively communicated with the discharge ends of the left paint storage box (51) and the right paint storage box (52).

4. The automatic coating device for the side of the circuit board according to claim 3, wherein: The left paint storage box (51) is fixed on the left side of the lifting frame (55), and the right paint storage box (52) is movably connected to the right side of the lifting frame (55). The coating roller fixed group (31) is vertically rotatably connected to the left paint storage box (51), and the coating roller movable group (32) is vertically rotatably connected to the right paint storage box (52).

5. The automatic coating device for the side of the circuit board according to claim 1, wherein: The width adaptive driving component (6) includes a width adaptive driving cylinder (61), a guiding block (62), and a moving block (63). The moving block (63) is equipped with a coating roller movable group (32). The coating compensation assembly (5) is equipped with a lifting frame (55) that is adapted to be horizontally movably connected to the moving block (63). The guiding block (62) is horizontally arranged at the bottom of the lifting frame (55). The guiding block (62) is slidably connected to the right paint storage box (52). The width adaptive driving cylinder (61) is installed on one side of the lifting frame (55), and its push rod is connected to the right paint storage box (52). The coating roller movable group (32) is rotatably connected to the right paint storage box (52) through a rotating shaft.

6. The automatic coating device for the side of the circuit board according to claim 1, wherein: Coating roller protection plates (33) for facilitating the feeding of the circuit board are respectively provided at the feeding ends of the coating roller fixed group (31) and the coating roller movable group (32). The coating roller protection plates (33) are inclinedly installed on the lifting frame (55) from the feeding end towards the coating roller fixed group (31) and the coating roller movable group (32).

7. The automatic coating device for the side of the circuit board according to claim 1, wherein: Bevels (34) for facilitating the reception of ink are respectively provided at the ends of the coating roller fixed group (31) and the coating roller movable group (32).

8. The automatic coating device for the side of the circuit board according to claim 1, wherein: The feeding detection movable group includes a feeding alignment plate (22), a guiding frame (23), and a feeding alignment driving cylinder (24). The feeding positioning plate (21) is installed on the left side of the circuit board conveying line (1). The guiding frame (23) is installed at the bottom of the circuit board conveying line (1). The feeding alignment plate (22) is slidably connected to the guiding frame (23). The feeding alignment driving cylinder (24) is installed on the circuit board conveying line (1), and its push rod is connected to the feeding alignment plate (22).

9. The automatic coating device for the side of the circuit board according to claim 1, wherein: At the discharging end of the board feeding detection assembly (2), there is a lifting baffle component (7) for feeding the circuit boards at equal intervals. The lifting baffle component (7) includes a lifting baffle (71), a baffle driving cylinder (72), and a board feeding detection sensor (73). The baffle driving cylinder (72) is installed at the bottom of the circuit board conveying line (1). The lifting baffle (71) is connected to the push rod of the baffle driving cylinder (72) and moves up and down at the discharging end of the board feeding detection assembly (2) through the baffle driving cylinder (72). The board feeding detection sensor (73) is arranged at the feeding end of the board feeding detection assembly (2) and is signal-connected to the feeding alignment driving cylinder (24), the width adaptive driving cylinder (61), and the baffle driving cylinder (72).

10. The automatic coating device for the side of the circuit board according to claim 1, wherein: On the circuit board conveying line (1), there is also a rotating device (8) for rotating the circuit board for coating on the other two sides. The rotating device (8) includes a supporting plate (81), a supporting cylinder (82), a fourth motor (83), and a rotation sensor (84). The fourth motor (83) is installed at the bottom of the circuit board conveying line (1). The supporting cylinder (82) is installed on the output shaft of the fourth motor (83), and a supporting plate (81) is installed on the push rod of the supporting cylinder (82). The rotation sensor (84) is arranged on the front side of the fourth motor (83) and is signal-connected to the supporting cylinder (82).

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