A circuit board surface coating device

Abstract

The utility model provides a kind of line board surface coating device, belong to line board coating technical field, comprising: workbench and the glue gun set up on workbench;Further comprising: glue bucket is fixed on workbench, and pipeline is fixed with intercommunication between glue bucket and glue gun, workbench is provided with the adjusting unit compatible with glue gun, and;Supporting plate is fixed on workbench, and tray is slidably connected on supporting plate, line board is placed in tray, and transmission mechanism is provided on supporting plate and matched with tray;Through reciprocating motion of wiping plate, line board surface impurities can be effectively removed, no residue is ensured by physical friction and pressure, and the influence of adhesive adhesion is prevented.

Description

Technical Field

[0001] This utility model relates to the field of circuit board coating technology, and in particular to a circuit board surface coating device. Background Technology

[0002] Circuit board surface coating equipment is used in the electronics manufacturing industry to coat the surface of circuit boards with a new material (such as conformal coating, UV adhesive, etc.). It is mainly used to improve the waterproof, dustproof, and antistatic properties of circuit boards, thereby improving the reliability and service life of products. Spraying is currently the most common coating method in the industry. Conformal coating is evenly sprayed onto the surface of the circuit board through a spray gun to form a protective film. The advantages of spraying are uniform coating, high efficiency, and suitability for large-scale production.

[0003] Current circuit board surface spraying equipment requires cleaning the dust and impurities adhering to the circuit board surface before applying adhesive, otherwise it will greatly affect the adhesion between the adhesive and the circuit board. However, existing spraying equipment is difficult to quickly and effectively remove impurities from the circuit board surface.

[0004] Chinese Patent Publication No. (CN218360033U) discloses a spraying device for conformal coating of circuit boards, relating to the field of circuit board spraying technology. It addresses the problems of existing conventional circuit board conformal coating spraying devices, which typically involve spraying first and then drying, resulting in low drying efficiency and paint buildup on the circuit board surface due to low spraying pressure. The proposed device features a spraying unit mounted above a conveyor, with the spraying unit and conveyor fixedly connected by fastening screws. A pressurized heating chamber is mounted above the spraying unit. The pressurized heating box and the spraying device are fixedly connected by fastening screws. The spraying device is equipped with a two-in-one spray head. An air collecting hood is installed on one side of the pressurized heating box, and the air collecting hood is fixedly connected to the pressurized heating box by bolts. An air supply hose is installed between the air collecting hood and the two-in-one spray head. Both the air collecting hood and the two-in-one spray head are fixedly connected to the air supply hose by flanges. A support leg is installed below the conveying device. Although the above patent document can improve the spraying effect on the circuit board, it is difficult to remove the dust attached to the surface of the circuit board. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a circuit board surface coating device. The device effectively removes impurities from the circuit board surface through the reciprocating motion of the wiping plate, and ensures no residue through physical friction and pressure, thus preventing any impact on adhesive adhesion.

[0006] To solve the above-mentioned technical problems, this utility model solves the problem that the circuit board surface spraying device needs to clean dust and impurities before spraying glue in order to ensure the adhesion of the glue, and it is difficult to quickly and effectively remove impurities.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A circuit board surface coating apparatus, comprising:

[0009] The workbench and the glue gun mounted on the workbench;

[0010] Also includes:

[0011] A glue bucket is fixed on the workbench, and a connecting pipe is fixed between the glue bucket and the glue spray gun. An adjustment unit adapted to the glue spray gun is provided on the workbench.

[0012] A support plate is fixed on the workbench, and a tray is slidably connected to the support plate. The circuit board is placed in the tray, and a transmission mechanism that cooperates with the tray is provided on the support plate.

[0013] Preferably, the adjustment unit includes:

[0014] Two mounting brackets are fixed on the workbench, and a frame is slidably connected inside the mounting bracket. A lead screw a is rotatably connected to the frame. A glue gun is slidably connected to the frame through a threaded sleeve, and the threaded sleeve is threadedly connected to the lead screw a. A drive motor a is fixed on the frame and coaxially fixed to the lead screw a.

[0015] A lead screw b is rotatably connected to one of the mounting frames. The frame is threadedly connected to the lead screw b. A drive motor b is fixed on the mounting frame via a support frame. A bevel gear is fixed between the drive motor b and the lead screw b for meshing connection.

[0016] Preferably, the transmission mechanism includes:

[0017] A rotating shaft is rotatably connected to a support plate, and a servo motor connected to the rotating shaft is fixed on the support plate. A spur gear a is fixed on the rotating shaft. A toothed groove that meshes with the spur gear a is opened on the tray. A bracket is fixed on the tray, and an electric push rod is fixed on the bracket. A channel for the electric push rod to pass through is opened on the tray.

[0018] A positioning plate is slidably connected to the tray, and the positioning plate is fixed to the output end of the electric push rod. The tray is equipped with a dust removal component for cleaning the circuit board.

[0019] Preferably, the dust removal component includes:

[0020] A drive shaft rotatably connected to the mounting frame, a spur gear b fixed on the drive shaft, and a rack that meshes with the spur gear b fixed on the tray, an incomplete gear fixed on the drive shaft, and a toothed ring meshing with the incomplete gear;

[0021] The mounting frame is fixed on the mounting bracket, and the toothed ring is slidably connected to the mounting frame. A wiping plate is fixed to one side wall of the toothed ring near the tray.

[0022] Preferably, the length of the rack is the same as the length of the tray, and the bottom surface of the tray and the top surface of the workbench are on the same horizontal plane.

[0023] Preferably, the tray has a groove for sliding connection of the positioning plate, and a rubber plate is fixed on the positioning plate.

[0024] Preferably, a guide block is fixed on the tray, and a guide groove is provided on the support plate to allow the guide block to slide.

[0025] Preferably, a guide rod is fixed on the toothed ring, and the guide rod is slidably connected to the mounting frame.

[0026] Preferably, a reinforcing frame is fixed between the support plate and the worktable, and the length of the support plate is greater than the length of the worktable.

[0027] Preferably, the diameter of the channel is larger than the diameter of the electric push rod, and one side wall of the rubber plate is chamfered.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This invention provides a circuit board surface coating device that effectively removes impurities adhering to the circuit board surface through the reciprocating motion of a wiping plate. This process is achieved through physical friction and pressure, ensuring that impurities are thoroughly removed without leaving any residue. This effectively prevents impurities from affecting the adhesion of the adhesive, as the adhesive can better bond with the circuit board material on the cleaned surface, thus forming a strong bond. This optimized cleaning process ultimately improves the adhesion of the adhesive sprayed onto the circuit board, making the adhesive distribution on the circuit board more uniform and the bonding stronger, thereby improving the reliability and service life of the entire circuit board.

[0030] This invention provides a circuit board surface coating device. Through the mechanism of dual motors working in tandem, the glue gun can achieve precise movement in all directions. In this way, the glue gun can perform a full-coverage conformal coating process on the circuit board, ensuring that the conformal coating can be evenly and thoroughly covered in every corner of the circuit board. This effectively solves the problems of uneven distribution and incomplete coverage of conformal coating that may occur in traditional spraying methods, thereby improving the protective performance and reliability of the circuit board. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0033] Figure 2 for Figure 1 Enlarged schematic diagram of the structure of region A in the middle;

[0034] Figure 3 This is a schematic diagram of the structure of the adjustment component of this utility model;

[0035] Figure 4 for Figure 3 Enlarged schematic diagram of the structure of region B in the middle;

[0036] Figure 5 This is a side sectional view of the mounting frame of this utility model.

[0037] Figure 6 for Figure 5 Enlarged schematic diagram of the structure of region C in the middle;

[0038] Figure 7 This is a schematic diagram of the support plate structure of this utility model.

[0039] Drawing Number Explanation: 1. Workbench; 2. Glue Gun; 3. Glue Bucket; 4. Pipe; 5. Adjustment Unit; 51. Mounting Frame; 52. Frame; 53. Lead Screw a; 54. Sleeve; 55. Drive Motor a; 56. Lead Screw b; 57. Support Frame; 58. Drive Motor b; 59. Bevel Gear; 6. Support Plate; 7. Tray; 8. Transmission Mechanism; 81. Rotating Shaft; 82. Servo Motor; 83. Spur Gear a; 84. Toothed Groove; 85. Bracket; 86. Electric Push Rod; 87. Channel; 88. Positioning Plate; 9. Dust Removal Assembly; 91. Drive Shaft; 92. Spur Gear b; 93. Rack; 94. Incomplete Gear; 95. Toothed Ring; 96. Mounting Frame; 97. Wiping Plate; 10. Slide; 11. Rubber Plate; 12. Guide Block; 13. Guide Groove; 14. Guide Rod; 15. Reinforcing Frame. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings.

[0041] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0042] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0043] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0044] Please see Figure 1 - Figure 7 A circuit board surface coating device includes a workbench 1 and a glue gun 2 mounted on the workbench 1, a glue bucket 3 fixed on the workbench 1, and a connecting pipe 4 between the glue bucket 3 and the glue gun 2. The workbench 1 is equipped with an adjustment unit 5 adapted to the glue gun 2, and a support plate 6 fixed on the workbench 1. A reinforcing frame 15 is fixed between the support plate 6 and the workbench 1. The addition of the reinforcing frame 15 effectively improves the connection stability between the support plate 6 and the workbench 1. The length of the support plate 6 is greater than the length of the workbench 1, and a tray 7 is slidably connected to the support plate 6. A guide block 12 is fixed on the tray 7, and a guide groove 13 is provided on the support plate 6 to allow the guide block 12 to slide. The guide block 12 slides in the guide groove 13 to guide the tray 7 when it is subjected to force, ensuring that the tray 7 moves in a relatively stable state. The circuit board is placed in the tray 7, and a transmission mechanism 8 that cooperates with the tray 7 is provided on the support plate 6.

[0045] It should be noted that the glue spray gun 2 is an existing product. The glue spray gun 2 uses compressed air as a power source. The flow and pressure of the compressed air are controlled by the air regulating valve. When the trigger is pulled, the air valve opens, and the compressed air reaches the nozzle through the air channel, forming a high-speed jet airflow. At the same time, the paint is sprayed out from the nozzle through the paint regulating valve. Under the action of the high-speed airflow, it is atomized into fine droplets and evenly sprayed on the surface of the workpiece to achieve precise control of the conformal coating sprayed on the circuit board. This is a conventional setting in this field, so it will not be described in detail here.

[0046] It should also be noted that when the circuit board surface needs to be coated with conformal coating, the circuit board is first placed stably inside the tray 7, and the transmission mechanism 8 moves the tray 7 to the workbench 1 to achieve the purpose of automated driving of the circuit board, further improving the efficiency of the conformal coating spraying work. The longitudinal and lateral positions of the glue gun 2 are precisely driven by the adjustment unit 5, and the glue gun 2 sprays the conformal coating in the glue bucket 3 onto the surface of the circuit board.

[0047] Further, such as Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, it is worth noting that the adjustment unit 5 includes two mounting brackets 51 fixed on the workbench 1. The length of the mounting bracket 51 is the same as the length of the workbench 1, and a frame 52 is slidably connected inside the mounting bracket 51. The angle between the frame 52 and the mounting bracket 51 is a right angle. A lead screw a53 is rotatably connected to the frame 52. The length of the frame 52 is the same as the width of the workbench 1. With the size matching of the frame 52 and the mounting bracket 51, the circuit board gluing process can be performed more comprehensively and accurately. The glue gun 2 is slidably connected to the frame 52 through a threaded sleeve 54, and the threaded sleeve 54 is threadedly connected to the lead screw a53. A drive motor a55 is fixed on the frame 52 and coaxially fixed to the lead screw a53. A lead screw b56 is rotatably connected to one of the mounting brackets 51. The frame 52 is threadedly connected to the lead screw b56. A drive motor b58 is fixed on the mounting bracket 51 through a support frame 57. A bevel gear 59 is fixed between the drive motor b58 and the lead screw b56.

[0048] It should be noted that the glue gun 2 is controlled by drive motor a55 to move horizontally, while drive motor b58 controls its vertical positioning. This dual-motor collaborative mechanism enables the glue gun 2 to move precisely in all directions. In this way, the glue gun 2 can perform a full-coverage conformal coating process on the circuit board, ensuring that the conformal coating is evenly and thoroughly covered in every corner of the circuit board. This effectively solves the problems of uneven distribution and incomplete coverage of conformal coating that may occur in traditional spraying methods, thereby improving the protective performance and reliability of the circuit board.

[0049] Example 2: Based on Example 1, according to Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, it is worth noting that the transmission mechanism 8 includes a rotating shaft 81 rotatably connected to the support plate 6, and a servo motor 82 connected to the rotating shaft 81 is fixed on the support plate 6. A spur gear a83 is fixed on the rotating shaft 81. A toothed groove 84 meshing with the spur gear a83 is provided on the tray 7. A bracket 85 is fixed on the tray 7, and an electric push rod 86 is fixed on the bracket 85. A channel 87 is provided on the tray 7 for the electric push rod 86 to pass through. The diameter of the channel 87 is larger than the diameter of the electric push rod 86. One side wall of the rubber plate 11 is chamfered. A positioning plate 88 is slidably connected to the tray 7. A groove 10 is provided on the tray 7 for the positioning plate 88 to slide. The rubber plate 11 is fixed on the positioning plate 88. The positioning plate 88 is fixed to the output end of the electric push rod 86. A dust removal component 9 for cleaning the circuit board is provided on the tray 7.

[0050] It should be noted that the transmission mechanism 8 enables the circuit board to be moved to the processing area of ​​the workbench 1 at a uniform speed. This automated process ensures that the circuit board can be accurately transferred to the designated area, thereby greatly improving the efficiency and quality of the circuit board spraying operation. In addition, this process does not require the manual intervention of staff to place the circuit board in the processing area, thus greatly enhancing the intelligence level of the entire production process, reducing labor costs, and improving the accuracy and safety of the operation.

[0051] Further, such as Figure 1 and Figure 6As shown, it is worth noting that the dust removal assembly 9 includes a drive shaft 91 rotatably connected to the mounting frame 51, a spur gear b92 fixed on the drive shaft 91, and a rack 93 that meshes with the spur gear b92 fixed on the tray 7. The length of the rack 93 is the same as the length of the tray 7. The bottom surface of the tray 7 and the top surface of the workbench 1 are on the same horizontal plane. An incomplete gear 94 is fixed on the drive shaft 91. The incomplete gear 94 meshes with a toothed ring 95 and a mounting frame 96 fixed on the mounting frame 51. The toothed ring 95 is slidably connected to the mounting frame 96. A guide rod 14 is fixed on the toothed ring 95 and slides through the mounting frame 96. A wiping plate 97 is fixed on one side wall of the toothed ring 95 near the tray 7. The wiping plate 97 is made of polyester non-woven fabric. Because the fibers are fine and soft, it can effectively avoid scratching the circuit board during wiping. It also has good water absorption and can be used to remove moisture or oil from the surface of the circuit board.

[0052] It should be noted that by moving the tray 7 to the processing area, the meshing transmission between the rack 93 and the spur gear b92 ensures the stability and accuracy of the transmission. This method drives the wiping plate 97 to reciprocate, which is a key step in cleaning the circuit board surface. The wiping plate 97 effectively removes impurities adhering to the circuit board surface through physical friction and pressure. This ensures that impurities are thoroughly removed without leaving any residue, thus effectively preventing impurities from affecting the adhesion of the adhesive. This is because the adhesive can better bond with the circuit board material on the cleaned surface, forming a strong bond. This optimization of the cleaning process ultimately improves the adhesion of the adhesive sprayed on the circuit board, making the adhesive distribution on the circuit board more uniform and the adhesion stronger, thereby improving the reliability and service life of the entire circuit board.

[0053] In this solution, when the circuit board needs to be coated with conformal coating, the working principle of the adhesive application is as follows:

[0054] First, the circuit board is placed gently and steadily inside the tray 7. Driven by the servo motor 82, the rotating shaft 81 rotates, which drives the spur gear a83 to rotate synchronously. Utilizing the meshing transmission between the spur gear a83 and the toothed groove 84, the tray 7 moves towards the processing area after being subjected to force, which in turn drives the circuit board to move.

[0055] Secondly, while the tray 7 moves, the meshing transmission between the rack 93 and the spur gear b92 causes the transmission shaft 91 to rotate synchronously, which in turn drives the incomplete gear 94 to rotate synchronously. The meshing transmission between the incomplete gear 94 and the toothed ring 95 causes the toothed ring 95 to reciprocate within the mounting frame 96 after being subjected to force, which in turn drives the wiping plate 97 to move synchronously, and the wiping plate 97 automatically cleans the dust adhering to the surface of the circuit board.

[0056] Then, the drive of servo motor 82 is stopped after the circuit board is transferred to the designated position;

[0057] Finally, by adjusting the longitudinal and transverse positions of the glue gun 2, when adjusting the transverse position of the glue gun 2, the drive motor a55 drives the lead screw a53 to rotate synchronously. Utilizing the threaded transmission between the lead screw a53 and the lead sleeve 54, the transverse position of the glue gun 2 can be adjusted. When the vertical position of the glue gun 2 needs to be adjusted, the drive motor b58 drives the lead screw b56 to rotate synchronously through the meshing transmission of the bevel gear 59. Utilizing the threaded transmission between the lead screw b56 and the frame 52, the vertical position of the glue gun 2 can be adjusted, and the glue gun 2 sprays conformal coating onto the surface of the circuit board.

[0058] The drive motors a55, b58, and servo motor 82 can all be purchased commercially. All three motors are equipped with power supplies. This is a mature technology in the field and has been fully disclosed, so it will not be repeated in the specification.

[0059] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A circuit board surface coating apparatus, comprising: Workbench (1) and glue gun (2) installed on workbench (1); Its characteristic is that it further includes: A glue bucket (3) is fixed on the workbench (1), and a pipe (4) is fixed between the glue bucket (3) and the glue gun (2). An adjustment unit (5) adapted to the glue gun (2) is provided on the workbench (1). A support plate (6) is fixed on the workbench (1), and a tray (7) is slidably connected to the support plate (6). The circuit board is placed in the tray (7), and a transmission mechanism (8) that cooperates with the tray (7) is provided on the support plate (6).

2. The circuit board surface coating device according to claim 1, characterized in that, The adjustment unit (5) includes: Two mounting brackets (51) are fixed on the workbench (1), and a frame (52) is slidably connected inside the mounting bracket (51). A lead screw a (53) is rotatably connected on the frame (52). A glue gun (2) is slidably connected to the frame (52) through a threaded sleeve (54), and the threaded sleeve (54) is threadedly connected to the lead screw a (53). A drive motor a (55) is fixed on the frame (52) and coaxially fixed with the lead screw a (53). A lead screw b (56) is rotatably connected to one of the mounting brackets (51). The frame (52) is threadedly connected to the lead screw b (56). A drive motor b (58) is fixed on the mounting bracket (51) via a support frame (57). A bevel gear (59) is fixed between the drive motor b (58) and the lead screw b (56) for meshing connection.

3. The circuit board surface coating device according to claim 1, characterized in that, The transmission mechanism (8) includes: A rotating shaft (81) is rotatably connected to the support plate (6), and a servo motor (82) connected to the rotating shaft (81) is fixed on the support plate (6). A spur gear a (83) is fixed on the rotating shaft (81). A toothed groove (84) meshing with the spur gear a (83) is opened on the tray (7). A bracket (85) is fixed on the tray (7), and an electric push rod (86) is fixed on the bracket (85). A channel (87) for the electric push rod (86) to pass through is opened on the tray (7). A positioning plate (88) is slidably connected to the tray (7), and the positioning plate (88) is fixed to the output end of the electric push rod (86). A dust removal component (9) for cleaning the circuit board is provided on the tray (7).

4. The circuit board surface coating device according to claim 3, characterized in that, The dust removal component (9) includes: A drive shaft (91) rotatably connected to the mounting bracket (51), a spur gear b (92) is fixed on the drive shaft (91), and a rack (93) that meshes with the spur gear b (92) is fixed on the tray (7), an incomplete gear (94) is fixed on the drive shaft (91), and a toothed ring (95) is meshed with the incomplete gear (94); The mounting frame (96) is fixed on the mounting bracket (51), and the toothed ring (95) is slidably connected to the mounting frame (96). The toothed ring (95) has a wiping plate (97) fixed on one side wall near the tray (7).

5. The circuit board surface coating device according to claim 4, characterized in that, The length of the rack (93) is the same as the length of the tray (7), and the bottom surface of the tray (7) and the top surface of the workbench (1) are on the same horizontal plane.

6. The circuit board surface coating apparatus according to claim 3, characterized in that, The tray (7) is provided with a groove (10) for sliding connection of the positioning plate (88), and a rubber plate (11) is fixed on the positioning plate (88).

7. The circuit board surface coating device according to claim 1, characterized in that, The tray (7) is fixed with a guide block (12), and the support plate (6) is provided with a guide groove (13) for sliding connection of the guide block (12).

8. A circuit board surface coating apparatus according to claim 4, characterized in that, A guide rod (14) is fixed on the toothed ring (95), and the guide rod (14) slides through the mounting frame (96).

9. A circuit board surface coating device according to claim 1, characterized in that, A reinforcing frame (15) is fixed between the support plate (6) and the workbench (1), and the length of the support plate (6) is greater than the length of the workbench (1).

10. A circuit board surface coating apparatus according to claim 3, characterized in that, The diameter of the channel (87) is greater than the diameter of the electric push rod (86), and one side wall of the rubber plate (11) is set with a chamfered slope.

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