Coating machine

Abstract

The utility model discloses a coating machine, and belongs to the technical field of circuit board processing. The device comprises a rack, a circuit board bracket, a spray head, a truss manipulator and a collecting tank. The circuit board support is used for fixing a circuit board in the rack, the truss mechanical arm can drive the spray head to move so that the spray head can spray conformal coating to different positions of the circuit board, and in the process that one circuit board is replaced with the next circuit board after being sprayed, the truss mechanical arm can drive the spray head to move to the position above the collecting groove. And the collecting tank can collect the conformal coating dripping from the spray head, so that the possibility that the conformal coating in the spray head drips into the rack is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of circuit board processing, and in particular to a coating machine. Background Art

[0002] After the components are installed on the circuit board, the surface of the circuit board needs to be coated with conformal coating to protect the metal surface of the circuit board and the welding points of each component. Conformal coating has good high and low temperature resistance; after curing, it forms a transparent protective film with excellent insulation, moisture-proof, leakage-proof, shock-proof, dust-proof, corrosion-proof, aging-proof, and corona-resistant properties.

[0003] A patent with announcement number CN218690886U discloses a device for spraying conformal coating on circuit boards. A spray head is set up to spray the conformal coating on the circuit board. When one circuit board is sprayed and replaced with the next one, the conformal coating in the spray head will drip and pollute the inside of the device. Utility Model Content

[0004] The purpose of this application is to solve the above problems in the prior art and propose a coating machine.

[0005] The present application can be implemented through the following technical solutions: a coating machine, including a frame, a circuit board bracket, a nozzle, a truss manipulator and a collection tank. The circuit board bracket is arranged in the frame, and the circuit board bracket is used to fix the circuit board; the nozzle is used to spray the three-conformal paint on the circuit board; the truss manipulator is used to drive the nozzle to move, so that the nozzle can spray the three-conformal paint on different positions of the circuit board; the collection tank is fixedly connected to the frame, and the truss manipulator can drive the nozzle to move above the collection tank.

[0006] In the above technical solution, the circuit board bracket is used to fix the circuit board inside the frame, and the truss manipulator can drive the nozzle to move so that the nozzle can spray the three-conformal paint on different positions of the circuit board. When one circuit board is sprayed and replaced with the next one, the truss manipulator can drive the nozzle to move above the collection tank, and the collection tank can collect the three-conformal paint dripping from the nozzle, thereby reducing the possibility of the three-conformal paint in the nozzle dripping into the frame.

[0007] Furthermore, the circuit board bracket includes a carrier, a limiting guide rail and a conveying assembly. The carrier is used for the circuit board to be inserted; the limiting guide rail is provided with two and both are penetrated through the frame, the limiting guide rail is formed with a limiting step along its length direction, the limiting step is slidably connected to a bearing platform, the two bearing platforms are used to place the same carrier, and the thickness side wall of the carrier can contact the vertical side walls of the two limiting steps; the conveying assembly is used to convey the bearing platform along the length direction of the limiting guide rail.

[0008] In the above technical solution, the transport component is used to transport the carrier along the length direction of the limiting guide rail so that the circuit board can enter the rack and be sprayed by the nozzle. The limiting step has a limiting effect on the carrier to ensure the spraying effect of the circuit board.

[0009] Furthermore, the limiting guide rail is fixedly mounted with a sleeve 1, the frame is provided with a sleeve 2 which is arranged on the sleeve 1, the sleeve 2 is provided with a spring which can force the sleeve 1 away from its internal bottom surface, and the carrier can apply force to the limiting guide rails so that the two limiting guide rails move away from each other.

[0010] In the above technical solution, by providing the first sleeve and the second sleeve, circuit boards of different widths can be accommodated between the two limiting guide rails, and the application range is wide.

[0011] Furthermore, each of the position limiting guide rails is formed with a contact block exposed from the frame, a vertical side wall of the contact block is formed with an arc surface, the two contact blocks are arranged opposite to each other, and the carrier can contact the bearing platform through the arc surface.

[0012] In the above technical solution, the carrier can contact the supporting platform through the curved surface. Workers do not need to manually push the two limit guide rails every time they place the carrier. The carrier can directly apply force to the curved surface during contact with the curved surface to move the two limit guide rails away from each other, which is more convenient.

[0013] Furthermore, the contact block is rotatably connected to a plurality of rollers, and the axial outer walls of the rollers can contact the thickness side walls of the carrier.

[0014] In the above technical solution, the rollers can enable the carrier to be pushed onto the carrying platform more smoothly.

[0015] Furthermore, the support platform is provided with a groove, and the bottom surface of the carrier is provided with two clamping blocks, and the two grooves are used for the two clamping blocks to be clamped in a one-to-one correspondence.

[0016] In the above technical solution, the relative position of the carrier with respect to the supporting platform is further fixed by engaging the groove with the clamping block, so that the position of the circuit board to be sprayed is accurate.

[0017] Furthermore, it also includes a placement plate fixedly mounted on the outer wall of the frame, and the upper surface of the placement plate is flush with the upper surface of the supporting platform.

[0018] In the above technical solution, when the card block needs to be engaged with the groove, it is only necessary to abut the card block against the upper surface of the placement plate, and then push the carrier along the length direction of the limiting guide rail. The card block can contact the upper surface of the support platform through the placement plate, and then continue to push the carrier until the card block is engaged in the groove, which is more convenient.

[0019] Furthermore, the conveying assembly includes a lead screw and a motor. The lead screw has a length direction consistent with the length direction of the limit guide rail and is threadedly connected to the support platform; the motor is used to drive the lead screw to rotate so that the lead screw can drive the circuit board into the rack through the carrier.

[0020] In the above technical solution, the motor drives the lead screw to rotate, and the rotation of the lead screw can drive the bearing platform to move along the length direction of the limiting guide rail.

[0021] To summarize, the present application has the following technical effects: the circuit board bracket is used to fix the circuit board inside the frame, the truss manipulator can drive the nozzle to move so that the nozzle can spray conformal paint on different positions of the circuit board, and when one circuit board is sprayed and replaced with the next one, the truss manipulator can drive the nozzle to move above the collection tank, and the collection tank can collect the conformal paint dripping from the nozzle, thereby reducing the possibility of the conformal paint in the nozzle dripping into the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of this application;

[0023] Figure 2 It is a schematic diagram of the position of the middle load platform;

[0024] Figure 3 is a schematic diagram of the position of the spring in this application;

[0025] Figure 4 yes Figure 1 A magnified view of the structure in the middle A area;

[0026] Figure 5 It is a schematic diagram of the location of the maintenance door in this application.

[0027] Description of reference numerals:

[0028] 1. Frame; 11. Feed inlet; 12. Discharge outlet; 15. Maintenance door; 151. Observation glass; 2. Circuit board bracket; 21. Carrier; 22. Limiting guide rail; 221. Limiting step; 23. Carrying platform; 231. Groove; 24. Conveying assembly; 241. Screw; 242. Motor; 3. Nozzle; 4. Truss manipulator; 41. X-axis assembly; 411. X-axis screw; 412. X-axis motor; 42. Y-axis assembly; 421. Y-axis fixing frame; 422. Y-axis screw; 43. Z-axis assembly; 431. Mounting frame; 432. Electric push rod; 5. Collecting trough; 6. Sleeve 1; 7. Sleeve 2; 8. Spring; 9. Contact block; 91. Arc surface; 10. Roller; 13. Block; 14. Placement plate; 16. Fixing frame; 161. Adjustment slot. DETAILED DESCRIPTION

[0029] Please refer to the attached drawings in the instruction manual. Figure 1 One embodiment of the present application provides a coating machine, including a frame 1, a nozzle 3 capable of spraying conformal coating is provided in the frame 1, the nozzle 3 can be connected to a barrel through a hose, a pump capable of pumping conformal coating into the hose can be provided in the barrel, a circuit board holder 2 is provided in the frame 1, the circuit board holder 2 can fix the circuit board in the frame 1, the nozzle 3 is driven by a truss manipulator 4 to move in the frame 1, so that the nozzle 3 can spray conformal coating on different positions of the circuit board. Among them, a collecting tank 5 is provided in the frame 1, and when the nozzle 3 sprays the circuit board and replaces the next circuit board, the truss manipulator 4 can drive the nozzle 3 to be located above the collecting tank 5, and the collecting tank 5 can collect the conformal coating dripped from the nozzle 3, reducing the possibility of the conformal coating in the nozzle 3 dripping into the frame 1.

[0030] Please refer to the attached drawings in the instruction manual. Figure 1 and Figure 2 The frame 1 is provided with a feed port 11 and a discharge port 12. The circuit board bracket 2 includes two limiting guide rails 22 penetrating the frame 1. The two ends of the limiting guide rails 22 in the length direction are exposed to the frame 1 through the feed port 11 and the discharge port 12 respectively. The limiting guide rails 22 are formed with a limiting step 221 along their length direction. The limiting guide rails 22 are slidably connected with a bearing platform 23. The bearing platform 23 can slide along the length direction of the limiting step 221. The two bearing platforms 23 are used to place the same carrier 21, and the thickness side walls of the carrier 21 can contact the vertical side walls of the two limiting steps 221 away from the ground. The carrier 21 is used for the circuit board to be inserted, so that the position of the circuit board is fixed relative to the carrier 21. Among them, a rectangular groove 231 is provided on the bearing platform 23, and two card blocks 13 are formed at the bottom of the carrier 21. The two grooves 231 are used for the two card blocks 13 to be inserted one by one, so that the position of the carrier 21 is fixed relative to the bearing platform 23. The supporting platform 23 is driven to move along the length direction of the limiting guide rail 22 by a conveying assembly 24. The conveying assembly 24 includes a screw 241 threadedly connected to the supporting platform 23. The length direction of the screw 241 is consistent with the length direction of the limiting guide rail 22. The screw 241 is driven to rotate by a motor 242. The rotation of the screw 241 can drive the circuit board located inside the frame 1 through the carrier 21 to be sprayed with triple-proof paint by the nozzle 3.

[0031] Please refer to the attached drawings in the instruction manual. Figure 1For ease of explanation, the distance direction between the two limit rails is defined as the x-axis, the length direction of the limit rail 22 is defined as the y-axis, and the height direction of the frame 1 is defined as the Z-axis. The truss manipulator 4 includes an x-axis assembly 41, a y-axis assembly 42, and a z-axis assembly 43. The x-axis assembly 41 includes an x-axis lead screw 411 rotatably connected to the frame 1, the x-axis lead screw 411 is threadedly connected to a y-axis fixed frame 421, and the length direction of the y-axis fixed frame 421 is consistent with the length direction of the limit rail 22. The x-axis lead screw 411 is driven to rotate by an x-axis motor 412. The rotation of the x-axis lead screw 411 can drive the y-axis fixed frame 421 to move linearly along the x-axis. The y-axis fixed frame 421 is rotatably connected to a y-axis lead screw 422. The length direction of the y-axis lead screw 422 is consistent with the length direction of the y-axis fixed frame 421. The rod 422 is driven to rotate by a y-axis motor, and the y-axis lead screw 422 is threadedly connected to a mounting frame 431. The rotation of the y-axis lead screw 422 can drive the mounting frame 431 to move linearly along the y-axis direction. The z-axis assembly 43 includes an electric push rod 432, which is installed on the mounting frame 431. The telescopic end of the electric push rod 432 is fixed with a fixing frame 16. There are two nozzles 3 in total, and the two nozzles 3 can be detachably installed on the fixing frame 16. The electric push rod 432 can drive the fixing frame 16 to move along the z-axis to make the nozzle 3 close to or away from the circuit board.

[0032] Please refer to the attached drawings in the instruction manual. Figure 1 and Figure 3 The carrier 21 is provided with two mounting positions, each of which is used for a circuit board to be inserted. The two nozzles 3 can spray two circuit boards at the same time in a one-to-one correspondence, which is highly efficient. Three sleeves 1 6 are fixedly installed on the vertical side walls of each limiting guide rail 22 that are away from each other. The frame 1 is fixedly installed with six sleeves 2 7. The six sleeves 2 7 are sleeved on the six sleeves 1 6 in a one-to-one correspondence. The sleeves 2 7 are provided with springs 8 that force the sleeves 1 6 away from the inner bottom surface of the sleeves 2 7. The spring 8 is a compression spring 8. By setting the sleeves 1 6 and the sleeves 2 7, the spacing between the two limiting guide rails 22 can be adjusted, so that the limiting guide rails 22 can accommodate carriers 21 of different widths, and thus can accommodate circuit boards of different widths. The mounting frame 431 is provided with an adjustment slot 161 along the length direction of the limiting guide rail 22. The nozzles 3 can be connected to different positions of the adjustment slot 161 by bolts and nuts, so that the positions of the two nozzles 3 can be adapted to the size of the circuit board.

[0033] Please refer to the attached drawings in the instruction manual. Figure 1 and Figure 4, the two limiting guide rails 22 are formed with a contact block 9, the contact block 9 is arc-shaped as a whole, and the vertical side wall of the contact block 9 is formed with an arc surface 91. The two contact blocks 9 are arranged oppositely and are both located outside the frame 1. The two arc surfaces 91 are placed oppositely. Each contact block 9 is rotatably connected to a plurality of rollers 10, which are arranged along the length direction of the arc surface 91, and the axis direction of the roller 10 is perpendicular to the ground. The outer wall of the carrier 21 in the thickness direction can contact the axial outer wall of the roller 10. When the carrier 21 contacts the rollers 10 located on different contact blocks 9 at the same time, it can apply force to the arc surface 91 so that the contact block 9 drives the two limiting guide rails 22 to expand the distance, so that the two carriers 23 can be placed on the carriers 21 of different widths. By setting the rollers 10, the carrier 21 can be pushed onto the carrier 23 more smoothly. A placement plate 14 is fixedly installed on the outer wall of the frame 1, and the upper surface of the placement plate 14 is used to contact the card block 13, and the upper surface of the placement plate 14 is flush with the upper surface of the supporting platform 23. When feeding the carrier 21, first make the card block 13 contact the upper surface of the placement plate 14, and then push the carrier 21 forward until the two card blocks 13 enter the two card slots one by one, which is more convenient.

[0034] Please refer to the attached drawings in the instruction manual. Figure 5 The frame 1 is also hinged with a maintenance door 15, and the maintenance door 15 is provided with an observation window 151. By providing the maintenance door 15, the parts in the frame 1 can be repaired in time when they fail or are damaged. A CCD detection camera is also provided at the discharge port in the frame, and the CCD detection camera is used to detect the spraying quality of the circuit board. A nitrogen outlet can also be provided between the nozzle and the CCD detection camera in the frame, and the nitrogen outlet is used to send nitrogen to the sprayed circuit board to make the three-conformal paint on the circuit board dry quickly.

[0035] The working principle of this embodiment is as follows: when feeding, first make the block 13 contact with the upper surface of the placement plate 14, then push the carrier 21 forward until the two blocks 13 enter the two slots one by one, and then the motor 242 can drive the screw 241 to rotate until the circuit board is located in the spraying area of ​​the nozzle 3. After the circuit board is sprayed, the motor 242 continues to drive the screw 241 to rotate so that the carrier 21 is located at the discharge port 12, and the worker can take the carrier 21 and the circuit board that have been sprayed.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coating machine, characterized in that: include: Rack (1); A circuit board bracket (2), the circuit board bracket (2) being arranged in the frame (1), and the circuit board bracket (2) being used to fix the circuit board; A spray head (3), the spray head (3) being used for spraying conformal coating on a circuit board; A truss manipulator (4), the truss manipulator (4) being used to drive the spray head (3) to move so that the spray head (3) can spray conformal coating on different positions of the circuit board; A collecting trough (5), wherein the collecting trough (5) is fixedly connected to the frame (1), and the truss manipulator (4) is capable of driving the nozzle (3) to move above the collecting trough (5).

2. A coating machine according to claim 1, characterized in that: The circuit board bracket (2) comprises: A carrier (21), the carrier (21) being used for the circuit board to be inserted into; A limiting guide rail (22), wherein two limiting guide rails (22) are provided and both are penetrated through the frame (1), and the limiting guide rail (22) is formed with a limiting step (221) along its length direction, and the limiting step (221) is slidably connected to a bearing platform (23), and the two bearing platforms (23) are used to place the same carrier (21), and the thickness side wall of the carrier (21) can contact the vertical side walls of the two limiting steps (221); A conveying assembly (24), wherein the conveying assembly (24) is used to convey the bearing platform (23) along the length direction of the limiting guide rail (22).

3. A coating machine according to claim 2, characterized in that: The limiting guide rail (22) is fixedly mounted with a sleeve one (6); the frame (1) is provided with a sleeve two (7) which is arranged on the sleeve one (6); the sleeve two (7) is provided with a spring (8) which can force the sleeve one (6) away from its inner bottom surface; the carrier (21) can apply force to the limiting guide rail (22) so that the two limiting guide rails (22) are moved away from each other.

4. A coating machine according to claim 3, characterized in that: Each of the limit guide rails (22) is formed with a contact block (9) exposed outside the frame (1), and a vertical side wall of the contact block (9) is formed with an arc surface (91). The two contact blocks (9) are arranged opposite to each other, and the carrier (21) can contact the support platform (23) through the arc surface (91).

5. A coating machine according to claim 4, characterized in that: The contact block (9) is rotatably connected to a plurality of rollers (10), and the axial outer walls of the rollers (10) are capable of contacting the thickness side walls of the carrier (21).

6. A coating machine according to claim 2, characterized in that: The support platform (23) is provided with a groove (231), and the bottom surface of the carrier (21) is provided with two clamping blocks (13), and the two grooves (231) are used for the two clamping blocks (13) to be clamped in one-to-one correspondence.

7. A coating machine according to claim 4, characterized in that: It also includes a placement plate (14) fixedly mounted on the outer wall of the frame (1), and the upper surface of the placement plate (14) is flush with the upper surface of the supporting platform (23).

8. A coating machine according to claim 2, characterized in that: The conveying assembly (24) comprises: A lead screw (241), wherein the length direction of the lead screw (241) is consistent with the length direction of the limit guide rail (22) and is threadedly connected to the bearing platform (23); A motor (242) is used to drive the lead screw (241) to rotate, so that the rotation of the lead screw (241) can drive the circuit board into the frame (1) through the carrier (21).

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