Circuit board anti-corrosion film spraying device

Abstract

The circuit board anti-corrosion film spraying device comprises a rack, a rotating disc is rotationally connected to the middle of the top end of the rack, and four discharging blocks are fixedly connected to the top of the rotating disc at equal intervals; a semicircular processing cover is erected on the top of the rack and located above the rotary disc, the rotary disc is divided into an inner part and an outer part by the processing cover, a baffle is fixedly connected to the interior of the processing cover, and the interior of the processing cover is divided into a spraying bin and a drying bin by the baffle; a plurality of nozzles are arranged in the spraying bin, an infrared drying lamp panel capable of being adjusted up and down is arranged in the drying bin, rolling ball-extrusion ring transmission is combined, circuit boards of different sizes are elastically adapted, mechanical damage is avoided, accurate positioning is guaranteed through slope-rolling ball linkage, and it is guaranteed that no displacement deviation exists during spraying; the adhesion consistency of the anticorrosive film is obviously improved; the spraying bin and the drying bin are designed in a partitioned mode, a drying lamp panel is adjusted through a screw, the spraying and drying process is continuous, parameters are flexible and adjustable, the drying efficiency is improved, and the thickness uniformity deviation of an anticorrosive film is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of circuit board processing equipment, and specifically relates to a circuit board anti-corrosion film spraying device. Background Technology

[0002] Against the backdrop of the rapid development of the electronics manufacturing industry, circuit boards, as core components of electronic devices, require surface anti-corrosion treatment, such as coating with conformal coating or nano-anti-corrosion film, which is a crucial step in ensuring long-term reliability. Currently, in the production of anti-corrosion films for circuit boards, most existing integrated spraying and drying equipment has a fixed structure, resulting in poor spraying uniformity and inflexible drying parameter adjustments. This leads to uneven anti-corrosion film thickness, unstable drying effects, and increased rework costs. Furthermore, most equipment lacks integrated automated material handling and precise positioning functions, requiring additional workstations, disrupting the process flow, occupying production space, and lengthening the overall production cycle. Summary of the Invention

[0003] The purpose of this invention is to provide a circuit board anti-corrosion film spraying device to solve the above-mentioned problems.

[0004] To address the above problems, the present invention provides a technical solution:

[0005] A circuit board anti-corrosion film spraying device includes a frame, a turntable rotatably connected to the top center of the frame, and four material feeding blocks fixedly connected at equal intervals to the top of the turntable; a semi-circular processing cover is mounted on the top of the frame and above the turntable, the processing cover dividing the turntable into inner and outer parts, and a baffle fixedly connected inside the processing cover, the baffle dividing the interior of the processing cover into a spraying chamber and a drying chamber; the spraying chamber is equipped with a plurality of spray nozzles, and the drying chamber is equipped with an infrared drying lamp plate that can be adjusted up and down.

[0006] As a preferred embodiment of the present invention, a servo motor with an encoder is fixedly connected to the bottom of the frame. The output end of the servo motor passes through the frame and is fixedly connected to the lower middle part of the turntable to drive the turntable to rotate and provide feedback of the rotation angle signal.

[0007] As a preferred embodiment of the present invention, a loading and unloading robot is mounted on the top of the frame and at both ends of the turntable for loading and unloading circuit boards.

[0008] As a preferred embodiment of the present invention, a shallow groove is provided at the top end of the feeding block near the center of the turntable, and a deep groove is provided at the top end of the feeding block away from the shallow groove, and the deep groove is connected to the shallow groove; a pressing limiting block that can move along the deep groove is provided inside the deep groove for positioning and clamping the circuit board.

[0009] As a preferred embodiment of the present invention, a plurality of guide rods are inserted into the end of the feeding block away from the shallow groove, and the guide rods are fixedly connected to the extrusion limiting block; a connecting plate is fixedly connected between the ends of the guide rods away from the extrusion limiting block and located outside the feeding block; a spring is sleeved on the rod segment of the guide rod located between the extrusion limiting block and the feeding block, and the two ends of the spring are fixedly connected to the inner walls of the extrusion limiting block and the feeding block respectively, forming an elastic reset structure of the extrusion limiting block.

[0010] As a preferred embodiment of the present invention, a connecting sleeve is fixedly connected to the end of the connecting plate away from the guide rod, a compression sleeve is threadedly connected to the end of the connecting sleeve away from the connecting plate, and a ball is rotatably connected to the end of the compression sleeve away from the connecting sleeve, so as to realize the transmission of force and the rotation guidance of the ball.

[0011] As a preferred embodiment of the present invention, an extrusion ring is fixedly connected to the inner wall of the processing cover relative to the material feeding block, and the extrusion ring is in contact with the ball bearing of the extrusion sleeve; both ends of the extrusion ring are provided with inclined surfaces, and the displacement of the extrusion limiting block is controlled by the cooperation of the ball bearing and the inclined surfaces.

[0012] As a preferred embodiment of the present invention, the top of the nozzle passes through the processing cover, and a connecting pipe is connected between the portions of the nozzle located outside the processing cover. A connecting pipe connected to the paint bucket is connected between the connecting pipes to form a liquid supply passage for spraying.

[0013] As a preferred embodiment of the present invention, the processing cover is threadedly connected to the drying chamber with a screw rod at its position relative to the drying chamber. The bottom of the screw rod passes through the processing cover and is rotatably connected to the infrared drying lamp plate. The top of the infrared drying lamp plate is fixedly connected to two limiting guide rods that are inserted into the processing cover, so as to realize the vertical position adjustment and movement guidance of the infrared drying lamp plate.

[0014] The beneficial effects of this invention are as follows: The material feeding block has a "shallow groove + deep groove + elastic extrusion limiting block" structure, combined with a ball-extrusion ring drive, which can flexibly adapt to circuit boards of different sizes to avoid mechanical damage, and ensure precise positioning through the inclined plane-ball linkage, ensuring no displacement deviation during spraying, and significantly improving the consistency of anti-corrosion film adhesion; The partitioned design of the spraying chamber and drying chamber + screw adjustment of the drying lamp plate makes the spraying and drying process continuous and the parameters flexibly adjustable, improving drying efficiency and reducing the deviation of anti-corrosion film thickness uniformity. Attached Figure Description

[0015] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the material feeding block of the present invention;

[0018] Figure 3 This is a cross-sectional view of the feeding block of the present invention;

[0019] Figure 4 This is a schematic diagram of the internal structure of the processing cover of the present invention.

[0020] In the diagram: 1. Frame; 2. Turntable; 3. Loading / unloading robot; 4. Feeding block; 5. Processing cover; 6. Deep groove; 7. Extrusion limit block; 8. Guide rod; 9. Spring; 10. Connecting plate; 11. Connecting screw sleeve; 12. Extrusion sleeve; 13. Ball; 14. Extrusion ring; 15. Shallow groove; 16. Baffle; 17. Spray nozzle; 18. Connecting pipe; 19. Connecting pipe; 20. Spraying chamber; 21. Drying chamber; 22. Infrared drying lamp plate; 23. Screw. Detailed Implementation

[0021] like Figure 1-4 As shown, the specific embodiment adopts the following technical solution: a circuit board anti-corrosion film spraying device, including a frame 1 welded from carbon steel, with an anti-slip pad at the bottom and a turntable 2 rotatably connected to the top center via a bearing; a servo motor with an encoder is fixed at the bottom of the frame 1, and the motor output end passes through the bottom plate of the frame and is keyed to the lower center of the turntable 2 to drive the turntable 2 to rotate precisely; four feeding blocks 4 are welded at equal intervals around the center of the turntable 2, and each feeding block 4 is used to place a circuit board.

[0022] The processing cover 5 is mounted directly above the turntable 2 and fixed to the frame 1 by a bracket; a baffle 16 is vertically welded to the middle of the inner side of the cover, dividing the internal space of the cover into a spraying chamber 20 and a drying chamber 21.

[0023] The spraying chamber 20 has multiple fan-shaped spray nozzles 17 inside. The top of the spray nozzles 17 passes through the top plate of the processing cover 5 and is connected in series outside through a U-shaped connecting pipe 18. The end of the connecting pipe 18 is connected to the paint bucket. The connecting pipe 19 is equipped with a flow regulating valve to control the spraying volume.

[0024] The drying chamber 21 has an infrared drying lamp plate 22 built in. The top of the lamp plate 22 is connected to the top plate of the processing cover 5 by two limiting guide rods. The center of the lamp plate 22 is rotatably connected to the screw 23 threaded to the outside of the processing cover 5. Rotating the screw 23 can adjust the height of the lamp plate 22.

[0025] Two industrial robots are mounted on the feed end and discharge end of the turntable 2 on the top of the frame 1, respectively, with vacuum suction cups as end grippers.

[0026] Each feeding block 4 is a cuboid with a shallow groove 15 at the top near the center of the turntable and a deep groove 6 at the end away from the shallow groove 15, which is connected to the shallow groove 15 to form an "L" shaped placement space. An extrusion limiting block 7 is provided inside, which can move horizontally along the deep groove 6.

[0027] Three guide rods 8 are inserted into the end face of the feeding block 4 away from the shallow groove 15. The guide rods 8 are threadedly connected to the rear end of the extrusion limiting block 7. The outer end of the guide rod 8 is fixed by the connecting plate 10. The rod body is fitted with a spring 9. The two ends of the spring 9 abut against the rear end of the extrusion limiting block 7 and the inner wall of the feeding block 4, respectively.

[0028] The outer side of the connecting plate 10 is fixedly connected to the screw sleeve 11, the screw sleeve 11 is threadedly connected to the extrusion sleeve 12, and the front end of the extrusion sleeve 12 is rotatably connected to the ball 13 through the bearing.

[0029] A section of extrusion ring 14 is fixed on the inner wall of the processing cover 5 corresponding to the position of each material feeding block 4. The inner side of the extrusion ring 14 contacts the rolling ball 13, and the two ends of the extrusion ring 14 are provided with inclined surfaces to guide the rolling ball 13 to enter and exit the extrusion state as the turntable rotates.

[0030] When the feeding block 4 rotates with the turntable 2 into the spraying chamber 20, the inlet slope of the extrusion ring 14 pushes the rolling ball 13 to retract into the extrusion sleeve 12, and drives the connecting plate 10 and the guide rod 8 to move backward through the screw sleeve 11. The extrusion limiting block 7 moves forward under the elastic force of the spring 9 until the front end of the extrusion limiting block 7 is tightly attached to the edge of the circuit board in the shallow groove 15, so as to achieve self-adaptive positioning.

[0031] When the feeding block 4 rotates away from the spraying chamber 20 and enters the drying chamber 21 or the loading / unloading area, the outlet slope of the extrusion ring 14 disengages from the rolling ball 13, the spring 9 resets and pushes the extrusion limit block 7 back into the deep groove 6, and the circuit board can be easily picked up and placed by the robot arm 3.

[0032] Specifically: A circuit board anti-corrosion film spraying device, in use, the loading and unloading robot 3 grabs the circuit board to be sprayed from the buffer area, moves it to the "loading station" of the turntable 2, directly above the shallow groove 15 of the material release block 4, and after descending, puts the circuit board into the shallow groove 15. Then the robot arm withdraws, and the loading is completed; the servo motor drives the turntable 2 to rotate 90 degrees counterclockwise, and the material release block 4 enters the spraying chamber 20. The inclined surface of the extrusion ring 14 pushes the rolling ball 13, and the extrusion limit block 7 clamps the circuit board under the action of the spring 9.

[0033] When the nozzle 17 is turned on, the paint is evenly sprayed onto the surface of the circuit board through the connecting pipe 18, and the spraying chamber 20 is equipped with an exhaust system to remove excess paint mist.

[0034] After the coating is completed, the turntable 2 continues to rotate 90 degrees under the drive of the servo motor, the material feeding block 4 enters the drying chamber 21, and the pressure limiting block 7 releases the circuit board; according to the film thickness setting, the rotating screw 23 adjusts the height of the infrared drying lamp plate 22 to the set point, and the lamp plate 22 is turned on for drying, and the film layer is cured.

[0035] After drying, turntable 2 rotates 90 degrees to the "unloading station". At this time, the unloading block 4 leaves the processing cover 5, the extrusion ring 14 disengages from the roller ball 13, and the circuit board inside the unloading block 4 loses its extrusion limit. The unloading robot 3 grabs the dried circuit board and transfers it to the finished product area. Then, turntable 2 rotates 90 degrees back to the initial unloading station to complete one cycle.

[0036] Material loading, spraying, drying and unloading are carried out simultaneously to avoid reducing work efficiency by proceeding step by step.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A circuit board anti-corrosion film spraying device, characterized in that, The utility model provides a kind of circuit board spraying and drying device, including rack (1), the top middle part of the rack (1) is rotatably connected with carousel (2), the top of the carousel (2) is equidistantly fixedly connected with four feeding blocks (4);The top of the rack (1) and above carousel (2) is erected with the processing cover (5) of half circle, the processing cover (5) divides carousel (2) into two parts inside and outside, the inside of the processing cover (5) is fixedly connected with baffle (16), the inside of the processing cover (5) is separated into spraying bin (20) and drying bin (21) by baffle (16);The inside of the spraying bin (20) is equipped with several spray heads (17), the inside of the drying bin (21) is equipped with the infrared ray drying lamp plate (22) that can be adjusted up and down.

2. The circuit board anticorrosive film spraying device according to claim 1, characterized by: The bottom of the rack (1) is fixedly connected with servo motor with encoder, the output end of the servo motor is fixedly connected with the lower middle part of carousel (2) through the rack (1), to drive carousel (2) to rotate and feedback rotation angle signal.

3. The circuit board anticorrosive film spraying device according to claim 1, characterized by: The top of the rack (1) and above both ends of carousel (2) is erected with feeding and discharging manipulator (3), for feeding and discharging operation to circuit board.

4. The circuit board anticorrosive film spraying apparatus according to claim 1, characterized by: The top of the feeding block (4) is excavated with shallow groove (15) near the end of the center of carousel (2), the top of the feeding block (4) is provided with deep groove (6) away from shallow groove (15), and the deep groove (6) is communicated with the shallow groove (15);The inside of the deep groove (6) is equipped with extrusion limiting block (7) that can move along deep groove (6), for positioning and clamping to circuit board.

5. The circuit board anticorrosive film spraying apparatus according to claim 1, characterized by: The end of the feeding block (4) away from shallow groove (15) is inserted with several guide rods (8), the guide rod (8) is fixedly connected with the extrusion limiting block (7);The end of the guide rod (8) away from extrusion limiting block (7) and located outside the feeding block (4) is fixedly connected with connecting plate (10), the spring (9) is sleeved on the rod segment of the guide rod (8) between extrusion limiting block (7) and feeding block (4), and the both ends of the spring (9) are fixedly connected with the inner wall of extrusion limiting block (7) and feeding block (4), to constitute the elastic return structure of the extrusion limiting block (7).

6. The circuit board anticorrosive film spraying apparatus according to claim 1, characterized by: The end of the connecting plate (10) away from guide rod (8) is fixedly connected with connecting screw sleeve (11), the end of the connecting screw sleeve (11) away from connecting plate (10) is threadedly connected with extrusion sleeve (12), the end of the extrusion sleeve (12) away from connecting screw sleeve (11) is rotatably connected with rolling ball (13), to realize force transmission and rotation guide of rolling ball (13).

7. The circuit board anticorrosive film spraying apparatus according to claim 1, characterized by: The position of the inner wall of the processing cover (5) relative to feeding block (4) is fixedly connected with extrusion ring (14), the rolling ball (13) of the extrusion ring (14) is contacted with the extrusion sleeve (12);The both ends of the extrusion ring (14) are provided with inclined plane, and the displacement control of extrusion limiting block (7) is realized by the cooperation of rolling ball (13) and inclined plane.

8. The circuit board anticorrosive film spraying apparatus according to claim 1, characterized by: The top of the spray head (17) passes through the processing cover (5), the part of the spray head (17) outside the processing cover (5) is connected with the communication pipe (18), the communication pipe (18) is connected with the connecting pipe (19) connected with the paint bucket, to constitute the liquid supply passage for spraying.

9. The circuit board anticorrosive film spraying apparatus according to claim 1, characterized by: The position of the processing cover (5) relative to the dry warehouse (21) is threadedly connected with the screw rod (23), the bottom of the screw rod (23) is rotatably connected with the infrared drying lamp plate (22) passing through the processing cover (5), and the top of the infrared drying lamp plate (22) is fixedly connected with two limiting guide rods inserted with the processing cover (5), so as to realize the up-down position adjustment and movement guidance of the infrared drying lamp plate (22).

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