Double-sided solder resist coating machine for PCB (Printed Circuit Board)

Abstract

The utility model discloses a double-sided solder resist coating machine for a PCB (Printed Circuit Board), which belongs to the technical field of PCB coating and comprises a rack, the inner wall of the rack is connected with a double-sided coating mechanism; a belt conveying line is arranged on the left side of the rack. Double-sided cleaning mechanisms are arranged on the left and right sides of the belt conveying line; the double-sided coating mechanism comprises a coating assembly and a scraping assembly, and the coating assembly is connected with the inner wall of the rack; the scraping assembly is connected with the inner wall of the rack; the scraping assembly is arranged on the right side of the coating assembly; the right side of the scraping assembly is connected with a discharging assembly which drives the PCB to be discharged. By means of the mode, the belt conveying line drives the PCB to move rightwards, the double-face cleaning mechanism conducts double-face cleaning on the PCB, the PCB conveys the cleaned PCB to the left side of the double-face coating mechanism, the coating assembly conducts double-face coating on the PCB and drives the PCB to move rightwards, and the scraping assembly scrapes redundant ink on the surface of the PCB. And the influence of over-thick ink on the performance of the PCB is avoided.

Description

Technical Field

[0001] This utility model relates to the field of PCB board coating technology, specifically to a PCB board double-sided solder resist coating machine. Background Technology

[0002] In today's era of rapid technological advancement, the PCB coating technology field has a very promising future. With the rapid development of industries such as 5G, artificial intelligence, and new energy vehicles, higher demands are being placed on the performance and quality of PCBs, prompting continuous innovation in coating technology.

[0003] Chinese patent CN219540810U discloses a coating mechanism for a PCB board, including a first coating roller rotatably mounted on a frame, a pressure roller on one side of the first coating roller, and a channel for the PCB board to pass through between the pressure roller and the first coating roller; a first scraper assembly including a scraper and a side plate, the scraper being disposed on the side of the first coating roller away from the channel and mounted on the frame, the side plate being slidably disposed at both ends of the scraper, the side plate being detachably connected to the scraper, and the side plate abutting against the first coating roller; the side plate, scraper, and first coating roller together define an ink tank, and a discharge groove is disposed on the side of the side plate near the first coating roller, communicating with the ink tank, and the discharge groove being used to discharge ink from the edge of the first coating roller. However, this mechanism still has the following problems:

[0004] This machine uses a pressure roller and a coating roller to coat one side of the PCB board. Coating the other side of the PCB board requires repeated operations, which increases the operation time and reduces the operation efficiency.

[0005] Based on this, this utility model designs a double-sided solder resist coating machine for PCB boards to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a double-sided solder resist coating machine for PCB boards.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A double-sided solder resist coating machine for PCB boards includes a frame;

[0009] The inner wall of the frame is connected to a double-sided coating mechanism for coating PCB boards; a belt conveyor for transporting PCB boards is provided on the left side of the frame; and double-sided cleaning mechanisms for double-sided cleaning of PCB boards are provided on both sides of the belt conveyor.

[0010] The double-sided coating mechanism includes a coating component and a scraping component. The coating component, used for double-sided coating of the PCB board, is connected to the inner wall of the frame. The scraping component, used for scraping off excess ink, is also connected to the inner wall of the frame. The scraping component is located on the right side of the coating component. The right side of the scraping component is connected to the unloading component that drives the PCB board to be unloaded.

[0011] Furthermore, the coating assembly includes an upper coating roller, a lower coating roller, a first drive motor, a second drive motor, and a transmission assembly. The front and rear inner walls of the frame are rotatably connected to the front and rear ends of multiple upper coating rollers, respectively. The first drive motor is fixedly connected to the front end of the frame, and its output end is fixedly connected to the rightmost upper coating roller. The ends of adjacent upper coating rollers are connected via the transmission assembly. The front and rear inner walls of the frame are rotatably connected to the front and rear ends of multiple lower coating rollers, respectively. The second drive motor is fixedly connected to the front end of the frame, and its output end is fixedly connected to the rightmost lower coating roller. The ends of adjacent lower coating rollers are connected via the transmission assembly. The transmission assembly is a belt and pulley drive structure.

[0012] Furthermore, the scraping assembly includes a limiting roller, a doctor blade, and an ink collection box. The front and rear inner walls of the frame are rotatably connected to the front and rear ends of multiple limiting rollers, respectively, and the surface of the limiting rollers is provided with an oleophobic coating. The front and rear inner walls of the frame are fixedly connected to the front and rear ends of two doctor blades, respectively, and the doctor blades are symmetrically connected to the frame. The doctor blade is located to the right of the limiting roller. An ink collection box is provided under the doctor blade. The front and rear ends of the ink collection box are detachably connected to the front and rear side walls of the frame, respectively.

[0013] Furthermore, the limiting rollers are symmetrically connected to the frame from top to bottom.

[0014] Furthermore, the double-sided cleaning mechanism includes a cleaning component and a flipping component. Cleaning components are provided on both the left and right sides of the belt conveyor, and a flipping component for flipping the PCB board is provided between the two cleaning components.

[0015] Furthermore, the cleaning component includes an impurity removal component and a blocking component. The impurity removal component is disposed on both the left and right sides of the belt conveyor line; a blocking component is disposed on the right side of each impurity removal component.

[0016] Furthermore, the impurity removal assembly includes a stand, a drive cylinder, a tooling frame, a rodless cylinder, a C-frame, and a cleaning roller. Stands are provided on both sides of the belt conveyor. A drive cylinder is fixedly connected to the upper end of the stand. A tooling frame is fixedly connected to the output end of the drive cylinder. Rodless cylinders are fixedly connected symmetrically at the lower end of the tooling frame. The moving ends of the rodless cylinders are all fixedly connected to the upper end of the C-frame. The inner walls of the front and rear sides of the C-frame are rotatably connected to the front and rear ends of the cleaning roller, respectively.

[0017] Furthermore, the flipping assembly includes a bracket, a rotating shaft, a drive block, a rotary cylinder, and limit rods. The bracket is positioned between the uprights on the left and right sides. The inner walls of the front and rear sides of the bracket are rotatably connected to the front and rear ends of the rotating shaft, respectively. The drive block is fixedly connected to the side wall of the rotating shaft. The rotary cylinder is fixedly connected to the front end of the bracket. The output end of the rotary cylinder is fixedly connected to the rotating shaft. Multiple limit rods are fixedly connected symmetrically at both ends of the drive block.

[0018] Compared with the prior art, the advantages of this utility model are as follows: the PCB board is driven to move to the right by the belt conveyor, the double-sided cleaning mechanism cleans the PCB board on both sides, the cleaned PCB board is transported to the left side of the double-sided coating mechanism, the coating component coats the PCB board on both sides and drives the PCB board to move to the right, and the scraping component scrapes off the excess ink on the surface of the PCB board to avoid the excessive ink affecting the performance of the PCB board. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0020] Figure 1 This utility model relates to a three-dimensional PCB board double-sided solder resist coating machine. Figure 1 ;

[0021] Figure 2 This is a front view of a PCB board double-sided solder resist coating machine according to the present invention;

[0022] Figure 3 This utility model relates to a three-dimensional PCB board double-sided solder resist coating machine. Figure 2 ;

[0023] Figure 4 This utility model relates to a three-dimensional PCB board double-sided solder resist coating machine. Figure 3 ;

[0024] Figure 5 This utility model relates to a three-dimensional PCB board double-sided solder resist coating machine. Figure 4 ;

[0025] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This utility model relates to a three-dimensional PCB board double-sided solder resist coating machine. Figure 5 ;

[0027] Figure 8 This utility model relates to a three-dimensional PCB board double-sided solder resist coating machine. Figure 6 .

[0028] The labels in the diagram represent:

[0029] 11. Frame; 12. Belt conveyor; 13. PCB board; 2. Double-sided coating mechanism; 21. Coating assembly; 211. Upper coating roller; 212. Lower coating roller; 213. Drive motor one; 214. Drive motor two; 215. Transmission assembly; 22. Scraping assembly; 221. Limiting roller; 222. Doctor blade; 223. Ink collection box; 3. Double-sided cleaning mechanism; 31. Cleaning assembly; 311. Stand; 312. Drive cylinder; 313. Tooling frame; 314. Rodless cylinder; 315. C-frame; 316. Cleaning roller; 321. Blocking cylinder; 322. Tooling plate; 323. Blocking rod; 324. Spring; 325. Limiting plate; 33. Tilting assembly; 331. Bracket; 332. Rotating shaft; 333. Drive block; 334. Rotary cylinder; 335. Limiting rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0032] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-8 A double-sided solder resist coating machine for PCB boards includes a frame 11;

[0033] The inner wall of the frame 11 is connected to a double-sided coating mechanism 2 for coating the PCB board 13. The double-sided coating mechanism 2 is as follows: Figures 1-4 As shown; a belt conveyor 12 for conveying PCB board 13 is provided on the left side of the frame 11; a double-sided cleaning mechanism 3 for double-sided cleaning of PCB board 13 is provided on both the left and right sides of the belt conveyor 12.

[0034] The double-sided coating mechanism 2 includes a coating component 21 and a scraping component 22. The coating component 21, which is used to coat the PCB board 13 on both sides, is connected to the inner wall of the frame 11. The scraping component 22, which is used to scrape off excess ink, is also connected to the inner wall of the frame 11. The scraping component 22 is located on the right side of the coating component 21. The right side of the scraping component 22 is connected to the unloading component that drives the PCB board 13 to be unloaded.

[0035] In this invention, the PCB board 13 is moved to the right by the belt conveyor 12, and the double-sided cleaning mechanism 3 cleans the PCB board 13 on both sides. The cleaned PCB board 13 is then conveyed to the left side of the double-sided coating mechanism 2. The coating component 21 coats the PCB board 13 on both sides and moves the PCB board 13 to the right. The scraping component 22 scrapes off excess ink from the surface of the PCB board 13 to prevent excessive ink from affecting the performance of the PCB board 13.

[0036] The coating assembly 21 includes an upper coating roller 211, a lower coating roller 212, a first drive motor 213, a second drive motor 214, and a transmission assembly 215. The front and rear inner walls of the frame 11 are rotatably connected to the front and rear ends of multiple upper coating rollers 211, respectively. The first drive motor 213 is fixedly connected to the front end of the frame 11, and its output end is fixedly connected to the rightmost upper coating roller 211. The ends of adjacent upper coating rollers 211 are connected via the transmission assembly 215. The front and rear inner walls of the frame 11 are rotatably connected to the front and rear ends of multiple lower coating rollers 212, respectively. The second drive motor 214 is fixedly connected to the front end of the frame 11, and its output end is fixedly connected to the rightmost lower coating roller 212. The ends of adjacent lower coating rollers 212 are connected via the transmission assembly 215. The transmission assembly 215 is a belt and pulley transmission structure.

[0037] The scraping assembly 22 includes a limiting roller 221, a doctor blade 222, and an ink collection box 223. The front and rear inner walls of the frame 11 are rotatably connected to the front and rear ends of multiple limiting rollers 221, respectively. The surface of the limiting rollers 221 is provided with an oleophobic coating. The limiting rollers 221 are symmetrically connected to the frame 11 from top to bottom. The front and rear inner walls of the frame 11 are fixedly connected to the front and rear ends of two doctor blades 222, respectively. The doctor blades 222 are symmetrically connected to the frame 11 from top to bottom. The doctor blades 222 are located to the right of the limiting rollers 221. An ink collection box 223 is provided on the lower side of the doctor blades 222. The front and rear ends of the ink collection box 223 are detachably connected to the front and rear side walls of the frame 11, respectively.

[0038] Preferably, the doctor blade 222 can be a V-shaped blade with the tip facing left. When the PCB board 13 is relatively dense, excess ink will move along the doctor blade 222 to the front and back sides and drip into the inside of the ink collection box 223.

[0039] In this invention, the belt conveyor 12 drives the cleaned PCB board 13 to move to the right side of the belt conveyor 12. The drive motor 1 213 drives the rightmost upper coating roller 211 to rotate counterclockwise through the transmission assembly 215. The drive motor 214 drives the rightmost lower coating roller 212 to rotate clockwise through the transmission assembly 215. The upper coating rollers 211 cooperate with the lower coating rollers 212 to move the PCB board 13 to the right and perform double-sided coating on the PCB board 13. The coated PCB board 13 moves to the right to the limiting roller 221, which limits the PCB board 13. The doctor blade 222 scrapes off the excess ink on the surface of the PCB board 13 to ensure the uniformity of the coating. The excess ink drips into the ink collection box 223 for collection, which facilitates the recycling of the ink inside the ink collection box 223.

[0040] like Figures 1-2 as well as Figures 5-8 As shown, the double-sided cleaning mechanism 3 includes a cleaning component 31 and a flipping component 33. The cleaning components 31 are provided on both the left and right sides of the belt conveyor 12, and a flipping component 33 for flipping the PCB board 13 is provided between the two cleaning components 31.

[0041] In this invention, the belt conveyor 12 drives the PCB board 13 to move to the right. After the left cleaning component 31 cleans one surface of the PCB board 13, the belt conveyor 12 continues to drive the PCB board 13 to move to the right to the flipping component 33. The flipping component 33 flips the PCB board 13 over, and the belt conveyor 12 drives the PCB board 13 to move to the right to the right cleaning component 31. The right cleaning component 31 cleans the other surface of the PCB board 13, thus achieving double-sided cleaning of the PCB board 13 and preventing impurities attached to the surface of the PCB board 13 from causing damage to the protective layer after coating.

[0042] The cleaning assembly 31 includes a stand 311, a drive cylinder 312, a fixture frame 313, a rodless cylinder 314, a C-frame 315, a cleaning roller 316, a blocking cylinder 321, a fixture plate 322, a blocking rod 323, a spring 324, and a limiting plate 325. Stands 311 are provided on both sides of the belt conveyor 12. A drive cylinder 312 is fixedly connected to the upper end of the stand 311. The output end of the drive cylinder 312 is fixedly connected to the fixture frame 313. Rodless cylinders 314 are symmetrically fixedly connected to the lower end of the fixture frame 313. The moving ends of the rodless cylinders 314 are all connected to… The upper end of the C-shaped frame 315 is fixedly connected; the front and rear inner walls of the C-shaped frame 315 are rotatably connected to the front and rear ends of the cleaning roller 316 respectively; the blocking cylinder 321 is located on the right side of the upright frame 311, and the output end of the blocking cylinder 321 is fixedly connected to the tooling plate 322; multiple blocking rods 323 are symmetrically slidably connected to the upper end of the tooling plate 322; the lower end of each blocking rod 323 is fixedly connected to the limit plate 325; springs 324 are sleeved on the side walls of each blocking rod 323, the upper end of the spring 324 is fixedly connected to the lower end of the tooling plate 322, and the lower end of the spring 324 is fixedly connected to the limit plate 325.

[0043] In this invention, the PCB board 13 is driven to move to the right by the belt conveyor 12. The output end of the blocking cylinder 321 drives the tooling plate 322 to move the blocking rod 323 upward, blocking the PCB board 13. At this time, the output end of the driving cylinder 312 drives the tooling frame 313 to move downward. The tooling frame 313 drives the C-shaped frame 315 to move downward through the rodless cylinder 314. When the side wall of the cleaning roller 316 is in contact with the PCB board 13, the moving end of the rodless cylinder 314 drives the C-shaped frame 315 to move the cleaning roller 316 to the right. The surface of PCB board 13 is cleaned. When the cleaning roller 316 moves to the rightmost side of the upper end of PCB board 13, the side wall of the cleaning roller 316 presses down on the blocking rod 323, and the spring 324 is stretched. However, the blocking rod 323 is not fully pressed down. At this time, the blocking rod 323 blocks PCB board 13. The output end of the drive cylinder 312 drives the tooling frame 313 to move upward and reset. The spring 324 drives the blocking rod 323 to reset. The moving end of the rodless cylinder 314 drives the C-shaped frame 315 to move the cleaning roller 316 to the left and reset, thus cleaning the surface of PCB board 13.

[0044] The flipping assembly 33 includes a bracket 331, a rotating shaft 332, a drive block 333, a rotary cylinder 334, and limiting rods 335. The bracket 331 is disposed between the uprights 311 on the left and right sides. The inner walls of the front and rear sides of the bracket 331 are rotatably connected to the front and rear ends of the rotating shaft 332, respectively. The drive block 333 is fixedly connected to the side wall of the rotating shaft 332. The rotary cylinder 334 is fixedly connected to the front end of the bracket 331. The output end of the rotary cylinder 334 is fixedly connected to the rotating shaft 332. Multiple limiting rods 335 are fixedly connected symmetrically at both ends of the drive block 333.

[0045] In this utility model, the belt conveyor 12 drives the PCB board 13 to move to the right. When the right end of the PCB board 13 is in contact with the left end of the drive block 333, the output end of the rotary cylinder 334 drives the rotating shaft 332 to rotate the PCB board 13 counterclockwise by 180 degrees through the left limit rod 335 and move it to the right side of the drive block 333. At this time, the belt conveyor 12 drives the PCB board 13 to continue to move to the right. At the same time, the limit rod 335, which was originally on the right side, moves to the left side and limits the PCB board 13 on the left side of the drive block 333.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A PCB double-sided solder resist coater comprising a frame (11), characterized in that, It also includes a belt conveying line (12), a double-sided coating mechanism (2) and a double-sided cleaning mechanism (3); The inner wall of the rack (11) is connected with the double-sided coating mechanism (2) for coating the PCB board (13); the left side of the rack (11) is provided with a belt conveying line (12) for conveying the PCB board (13); the left and right sides of the belt conveying line (12) are both provided with double-sided cleaning mechanisms (3) for cleaning the PCB board (13) on both sides. The double-sided coating mechanism (2) comprises a coating assembly (21) and a scraping assembly (22), the coating assembly (21) for coating the PCB board (13) on both sides is connected with the inner wall of the rack (11); the scraping assembly (22) for scraping excess ink is connected with the inner wall of the rack (11); the scraping assembly (22) is arranged on the right side of the coating assembly (21); the right side of the scraping assembly (22) is connected with a discharging assembly for discharging the PCB board (13).

2. The PCB board double-sided solder resist coater of claim 1, wherein, The coating assembly (21) comprises upper coating rollers (211), lower coating rollers (212), a driving motor one (213), a driving motor two (214) and a transmission assembly (215), the front and rear inner walls of the rack (11) are respectively rotatably connected with front and rear ends of a plurality of upper coating rollers (211); the driving motor one (213) is fixedly connected to the front end of the rack (11), and the output end of the driving motor one (213) is fixedly connected with the rightmost upper coating roller (211); the adjacent upper coating rollers (211) are drivingly connected through the transmission assembly (215); the front and rear inner walls of the rack (11) are respectively rotatably connected with front and rear ends of a plurality of lower coating rollers (212); the driving motor two (214) is fixedly connected to the front end of the rack (11), and the output end of the driving motor two (214) is fixedly connected with the rightmost lower coating roller (212); the adjacent lower coating rollers (212) are drivingly connected through the transmission assembly (215); the transmission assembly (215) is a belt and pulley transmission structure.

3. The PCB board double-sided solder mask coater of claim 1, wherein, The scraping assembly (22) comprises limiting rollers (221), ink scraping knives (222) and ink collecting boxes (223), the front and rear inner walls of the rack (11) are respectively rotatably connected with front and rear ends of a plurality of limiting rollers (221), and the surfaces of the limiting rollers (221) are provided with oil-repellent coatings; the front and rear inner walls of the rack (11) are respectively fixedly connected with front and rear ends of two ink scraping knives (222), and the ink scraping knives (222) are symmetrically connected with the rack (11) in an up-down manner; the ink scraping knives (222) are located on the right side of the limiting rollers (221); the ink scraping knives (222) are provided with the ink collecting boxes (223) on the lower sides; the front and rear ends of the ink collecting boxes (223) are detachably connected with the front and rear walls of the rack (11).

4. The PCB board double-sided solder mask coater of claim 3, wherein, The limiting rollers (221) are symmetrically connected with the rack (11) in an up-down manner.

5. The PCB board double-sided solder mask coater of claim 1, wherein, The double-sided cleaning mechanism (3) comprises cleaning assemblies (31) and turnover assemblies (33), the left and right sides of the belt conveying line (12) are both provided with the cleaning assemblies (31), and the turnover assembly (33) for turning over the PCB board (13) is arranged between the two cleaning assemblies (31).

6. The PCB board double-sided solder mask coater of claim 5, wherein, The cleaning assembly comprises an impurity removing assembly and a blocking assembly, and the impurity removing assembly is arranged on both sides of the belt conveying line (12).

7. The PCB board double-sided solder mask coater of claim 6, wherein, The impurity removing assembly comprises a stand (311), a driving cylinder (312), a tool holder (313), a rodless cylinder (314), a C-shaped frame (315) and a cleaning roller (316), and the belt conveying line (12) is arranged on both sides of the stand (311); the upper end of the stand (311) is fixedly connected with the driving cylinder (312); the output end of the driving cylinder (312) is fixedly connected with the tool holder (313); the lower end of the tool holder (313) is fixedly connected with the rodless cylinder (314) in a front-rear symmetrical manner; the moving end of the rodless cylinder (314) is fixedly connected with the upper end of the C-shaped frame (315); and the front-rear inner walls of the C-shaped frame (315) are rotatably connected with the front-rear ends of the cleaning roller (316).

8. The PCB board double-sided solder mask coater of claim 7, wherein, The turnover assembly (33) comprises a support (331), a rotating shaft (332), a driving block (333), a rotating cylinder (334) and a limiting rod (335), the support (331) is arranged between the left and right stands (311); the front-rear inner walls of the support (331) are rotatably connected with the front-rear ends of the rotating shaft (332); the side wall of the rotating shaft (332) is fixedly connected with the driving block (333); the front end of the support (331) is fixedly connected with the rotating cylinder (334); the output end of the rotating cylinder (334) is fixedly connected with the rotating shaft (332); and the left and right ends of the driving block (333) are fixedly connected with a plurality of limiting rods (335) in an up-down symmetrical manner.

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