Circuit board high-precision screen printing apparatus and processing method thereof

Abstract

The application relates to the field of circuit board processing, in particular to a high-precision screen printing device for circuit boards and a processing method thereof, which comprises an exchange device and at least two screen printing machine bodies, the screen printing machine body comprises a processing part, a rotating part and a plurality of conveyors, the rotating part is rotationally connected to the surface of the processing part, the plurality of conveyors are connected to the surface of the rotating part at intervals around the axis of the rotating part, the rotating part is provided with a feeding station, a processing station and a discharging station at intervals around the axis of the rotating part, and the exchange device comprises a base, an exchange assembly, at least two feeding belts and at least two discharging belts. In the application, the exchange assembly is arranged, at least two circuit boards can be fed into the printing device at one time, the feeding and processing efficiency of the circuit boards is improved, the printing device needs to be added only by adding the exchange device in one production line, the transformation of other devices in the production line is reduced, the occupied area of the transformation is reduced, and the processing cost of the circuit boards is reduced.

Description

Technical Field

[0001] This application relates to the field of circuit board processing, and in particular to a high-precision screen printing equipment for circuit boards and a processing method thereof. Background Technology

[0002] A circuit board is a conductive plate used to connect and support electronic components. Through pre-designed conductive paths, electronic components are connected together according to circuit principles, thereby realizing various functions of electronic devices.

[0003] During the production process, circuit boards are first printed and coated with solder paste. Then, they are heated through a specific reflow temperature profile to melt the solder paste. The alloy components in the paste are then fixed between the electronic components and the circuit board after cooling. Typically, when circuit boards produced on the production line enter the printing equipment, their position needs to be aligned with the center of the rotary table to ensure the accuracy of subsequent printing. After adjustment, the table rotates to the processing position, and the screen printing equipment prints the solder paste onto the designated position on the circuit board.

[0004] However, as industrial production demands higher efficiency in circuit board processing, conventional printing equipment can only process one battery cell at a time, resulting in low efficiency. Adding an extra production line is costly and requires more floor space, thus increasing the processing cost of circuit boards. Summary of the Invention

[0005] To improve the processing efficiency of circuit boards, this application provides a high-precision screen printing equipment and processing method for circuit boards.

[0006] In the first aspect, the high-precision screen printing equipment for circuit boards provided in this application adopts the following technical solution:

[0007] A high-precision screen printing device for circuit boards includes an exchange device and at least two screen printing machine bodies. The exchange device is located between the two screen printing machine bodies. Each screen printing machine body includes a processing section, a rotating section, and multiple conveyor belts. The rotating section is rotatably connected to the surface of the processing section. The multiple conveyor belts are spaced apart on the surface of the rotating section around its axis. Each conveyor belt surface is designed to hold at least two circuit boards. The rotating section has a loading station, a processing station, and a unloading station spaced apart around its axis. The rotating section rotates, causing each conveyor belt to sequentially pass through the loading station, processing station, and unloading station. The conveyor belt at the loading station holds at least two circuit boards. The processing section can screen print one of the circuit boards at the processing station. In the printing process, the conveyor belt at the unloading station reverses, causing two circuit boards to approach an exchange device. The exchange device includes a base, an exchange assembly, at least two feed belts, and at least two discharge belts. The at least two feed belts are connected to the base at intervals, and each feed belt corresponds to a circuit board at the unloading station. The exchange assembly is connected to the base and can interchange the circuit boards on the two feed belts. The at least two discharge belts are connected to the base at intervals, and each discharge belt corresponds to a feed belt. The feed belts carry the circuit boards onto the surface of the discharge belts, and the discharge belts transport the circuit boards to another screen printing machine body. The processing unit then performs screen printing on another circuit board at the processing station.

[0008] By adopting the above technical solution, two circuit boards are placed alternately on the conveyor belt of one of the screen printing machine's loading stations. The rotating part drives the conveyor belt of the loading station to the processing station. The processing unit performs screen printing on one of the circuit boards at the processing station. The rotating part then drives the conveyor belt of the processing station to the unloading station. The unloading station's conveyor belt reverses, causing the two circuit boards to enter the surface of the feeding belt one-to-one. The exchange component swaps the circuit boards on the two feeding belts. The feeding belt then drives the circuit boards one-to-one into the surface of the discharge belt. The discharge belt then drives the circuit boards into the conveyor belt of the other screen printing machine's loading station. The rotating part drives the conveyor belt of the loading station to the processing station. The processing unit performs screen printing on the other circuit board at the processing station, ensuring that the position of the circuit board is consistent with the processing end of the processing unit. This ensures the accuracy of subsequent printing on the circuit board, allowing the printing equipment to process at least two circuit boards at a time, improving the efficiency of circuit board loading and processing. Furthermore, adding printing equipment to a production line only requires adding an exchange device, reducing modifications to other equipment on the production line and reducing the floor space required for modifications, thereby reducing the processing cost of the circuit boards.

[0009] Optionally, the exchange assembly includes at least two plate-changing claws, at least two guide rails, and at least two support seats. The at least two guide rails are spaced apart and connected to the base surface. The length direction of the guide rails is parallel to the arrangement direction of the feed belt. Each support seat corresponds to and is slidably connected to the guide rail surface. Each plate-changing claw corresponds to and is slidably connected to the support seat surface. The sliding direction of the plate-changing claw is parallel to the height direction of the base. When each plate-changing claw corresponds to and abuts against a circuit board on the feed belt, the plate-changing claw slides along the support seat surface in a direction away from the feed belt. The plate-changing claw lifts the circuit board away from the feed belt surface. One plate-changing claw is higher than the other. At least two support seats slide along the guide rail surface in a direction closer to the adjacent feed belt, causing the plate-changing claw to move towards the adjacent feed belt. The plate-changing claw slides along the support seat surface in a direction closer to the feed belt, and the circuit board is placed on the feed belt surface.

[0010] By adopting the above technical solution, when two circuit boards on the unloading station of one of the screen printing machines are conveyed to the surfaces of the two feeding belts in a one-to-one correspondence, the changing claw corresponds to the feeding belt in a one-to-one correspondence. The changing claw slides along the surface of the support seat in a direction away from the base. The top surface of the changing claw abuts against the bottom of the circuit board and lifts the circuit board away from the surface of the feeding belt. The two support seats slide along the guide rail surface in a direction closer to the adjacent feeding belt, causing the changing plate to be located directly above the adjacent feeding belt. The changing claw slides along the surface of the support seat in a direction closer to the feeding belt. The bottom of the circuit board abuts against the surface of the feeding belt, realizing the exchange of positions between the processed circuit board and the unprocessed circuit board.

[0011] Optionally, the exchange assembly further includes at least two synchronous pulleys and a synchronous belt used in conjunction with the synchronous pulleys. The at least two synchronous pulleys are rotatably connected to the base surface at intervals. The at least two synchronous pulleys are located at both ends of the guide rail length. The synchronous belt is tightly connected to the two synchronous pulleys. The at least two support seats are correspondingly connected to both sides of the synchronous belt. When the synchronous pulleys rotate, they drive the two support seats to slide in the opposite direction along the guide rail surface.

[0012] By adopting the above technical solution, the synchronous belt tightly connects the two synchronous pulleys. When the synchronous pulleys rotate, they drive the synchronous belt. The two support seats are connected one-to-one on both sides of the synchronous belt, causing the support seats to slide in the opposite direction along the guide rail surface. There is no need to install a power device to drive each support seat, reducing energy consumption and thus embodying the concept of energy saving.

[0013] Optionally, a power assembly is connected to the support base. The power assembly includes a power motor, at least two synchronous pulleys, and a synchronous belt used in conjunction with the synchronous pulleys. The power motor is connected to the surface of the support base, and the motor axis of the power motor and the conveying direction of the feed belt are parallel to each other. One of the synchronous pulleys is coaxially connected to the motor shaft of the power motor, and the other synchronous pulley is rotatably connected to the surface of the support base. The synchronous belt tensions the two synchronous pulleys, and the plate changing claw is connected to the surface of the synchronous belt. When the power motor runs, it drives the plate changing claw to slide along the surface of the support base.

[0014] By adopting the above technical solution, when the bottom of the plate changing claw abuts against the bottom of the circuit board on the feed belt, the power motor runs, the synchronous belt two tensions the two synchronous pulleys two, and drives the plate changing claw to slide along the surface of the support seat, thereby realizing the directional sliding of the plate changing claw on the surface of the support seat.

[0015] Optionally, the surface of the board changing claw is connected to a suction cup, and the suction cup surface can be adsorbed onto the surface of the circuit board to form a limiting position.

[0016] By adopting the above technical solution, when the top surface of the board changing claw abuts against the bottom of the circuit board, the suction cup surface adheres to the circuit board surface to form a limit, making it less likely for the circuit board to shift on the board changing claw, thereby improving the limiting stability of the circuit board on the board changing claw.

[0017] Optionally, the plate changing claw is slidably connected to a limiting bent plate. The sliding direction of the limiting bent plate is parallel to the conveying direction of the feeding belt. When the limiting bent plate slides towards the suction cup, the surface of the limiting bent plate and the surface of the plate changing claw abut against both sides of the circuit board to form a limiting position.

[0018] By adopting the above technical solution, when the top surface of the board changing claw abuts against the bottom of the circuit board, it drives the limiting bent plate to slide towards the suction cup. The limiting bent plate surface and the board changing claw surface abut against both sides of the circuit board to form a limit, making it difficult for the circuit board to detach from the board changing claw, and further improving the limiting stability of the circuit board on the board changing claw.

[0019] Optionally, a starting assembly is connected between the limiting bent plate and the support base. The starting assembly includes a connecting rope and an elastic element. One end of the connecting rope is connected to the surface of the support base, and the other end of the connecting rope is connected to the surface of the limiting bent plate. One end of the elastic element in the elastic direction is connected to the surface of the limiting bent plate, and the other end of the elastic element in the elastic direction is connected to the surface of the plate changing claw. The elastic element has the tendency to elastically drive the plate changing claw to slide away from the suction cup. When the plate changing claw slides along the support base away from the base, the connecting rope drives the limiting bent plate to slide closer to the suction cup. The surfaces of the limiting bent plate and the plate changing claw abut against both sides of the circuit board to form a limiting position.

[0020] By adopting the above technical solution, when the top of the changing claw abuts against the bottom of the circuit board on the feeding belt, the changing claw slides along the surface of the support seat away from the base, lifting the circuit board off the surface of the feeding belt. The distance between the limiting bent plate and the support seat increases, and the connecting rope overcomes the elastic force of the elastic element and drives the limiting bent plate to slide towards the suction cup. The surface of the limiting bent plate and the surface of the changing claw abut against both sides of the circuit board to form a limit, and the connecting rope is in a taut state. When the changing claw slides towards the adjacent feeding belt and is located directly above the feeding belt, the changing claw slides along the surface of the support seat towards the feeding belt. The distance between the limiting bent plate and the support seat decreases, the connecting rope is in a slack state, and the elastic force of the elastic element drives the limiting bent plate to slide away from the suction cup. The surface of the limiting bent plate detaches from the surface of the circuit board, so that the limiting effect of the limiting bent plate on the circuit board disappears, and the bottom of the circuit board abuts against the surface of the feeding belt, realizing the interchange of circuit boards on the two feeding belts.

[0021] Optionally, a pressing assembly is connected between the limiting bent plate and the suction cup. The pressing assembly includes a pressing strip, a ball bearing, and an elastic element two. The end of the pressing strip is connected to the surface of the limiting bent plate facing the suction cup. The changing plate claw has a sliding cavity for the pressing strip to slide through, and a deformation cavity for accommodating the suction cup is formed on the changing plate claw. The deformation cavity is connected to the sliding cavity. The ball bearing is rotatably connected to the bottom of the suction cup. One end of the elastic element two in the elastic direction is connected to the inner wall of the deformation cavity. The other end is connected to the surface of the ball. The elastic element has elastic force to drive the ball to slide towards the sliding cavity. The end of the ball protrudes from the inner wall of the sliding cavity, and the suction cup surface contracts and recovers towards the deformation cavity. When the extrusion strip slides along the sliding cavity towards the deformation cavity, the surface of the extrusion strip rolls into contact with the ball spherical surface. The extrusion strip drives the ball to slide towards the deformation cavity. The suction cup surface is deformed by the extrusion of the ball and adsorbs onto the circuit board surface to form a limit.

[0022] By adopting the above technical solution, when the limiting bending plate slides towards the circuit board, the end of the extrusion strip is connected to the surface of the limiting bending plate. The limiting bending plate drives the extrusion strip to slide towards the deformation cavity. The surface of the extrusion strip makes rolling contact with the ball. The spherical surface of the ball guides the ball to slide towards the deformation cavity. The suction cup surface is deformed by the extrusion of the ball and adsorbs onto the circuit board surface, increasing the clamping force between the suction cup surface and the circuit board surface. When the positions of the circuit boards on the two feeding belts are interchanged, the limiting bending plate slides away from the circuit board, driving the extrusion strip to slide away from the deformation cavity. The pressure of the extrusion strip on the ball disappears, and the elastic force of the elastic element drives the ball to slide towards the sliding cavity. The end of the ball protrudes from the inner wall of the sliding cavity, and the suction cup surface contracts and recovers towards the deformation cavity, so that the suction force of the suction cup on the circuit board disappears, realizing the directional adsorption between the suction cup and the circuit board.

[0023] Optionally, the extrusion assembly further includes a pressure block. The inner wall of the deformation cavity is provided with a pressure chamber for the pressure block to slide. The pressure chamber is connected to the sliding chamber. The end of the pressure block protruding from the sliding chamber is provided with a guide surface. The guide surface is arc-shaped and can abut against the extrusion strip and guide the pressure block to slide towards the deformation cavity. The end of the pressure block protruding from the deformation cavity extrudes the surface of the suction cup, causing the surface of the suction cup to deform and adsorb the circuit board surface to form a limit.

[0024] By adopting the above technical solution, when the extrusion strip slides towards the suction cup, the guide surface abuts against the surface of the extrusion strip and guides the pressure block to slide towards the deformation cavity. The end of the pressure block protruding from the deformation cavity extrudes the surface of the suction cup, causing the surface of the suction cup to deform and adsorb the circuit board surface to form a limit, further improving the clamping force between the suction cup and the circuit board.

[0025] Secondly, the circuit board processing method provided in this application adopts the following technical solution:

[0026] The circuit board processing method, which utilizes high-precision screen printing equipment, includes the following steps:

[0027] Circuit board loading involves placing two circuit boards spaced apart on the conveyor belt surface of one of the screen printing machine's main loading stations.

[0028] In one circuit board processing step, the rotating part drives the conveyor belt on the loading station to move to the processing station, and the processing part performs screen printing on one of the circuit boards at the processing station.

[0029] When the circuit board is unloaded, the conveyor belt drives the conveyor belt of the processing station to move to the unloading station. The conveyor belt on the unloading station rotates in the opposite direction, causing two circuit boards to enter the two feeding belts one by one.

[0030] The circuit board positions are interchanged. The exchange component swaps the positions of the circuit boards on the two feed belts. The feed belts drive the circuit boards one by one into the surface of the discharge belt. The discharge belts then drive the circuit boards into the surface of the conveyor belt at the other screen printing machine's loading station.

[0031] In another circuit board processing step, the rotating part drives the conveyor belt on the loading station to move to the processing station, where the processing part performs screen printing on another circuit board at the processing station.

[0032] The circuit board is unloaded. The conveyor belt drives the conveyor belt of the processing station to move to the unloading station. The conveyor belt on the unloading station rotates in the opposite direction to unload the two circuit boards one by one.

[0033] By adopting the above technical solution, the exchange component swaps the circuit boards on the two feed belts, so that the position of the circuit board is consistent with the processing end of the processing department, ensuring the accuracy of the circuit board during subsequent printing. This allows the printing equipment to feed at least two circuit boards at a time, improving the efficiency of circuit board loading and processing. Furthermore, when adding printing equipment to an integrated production line, only the exchange device needs to be added, reducing the need to modify other equipment on the production line and reducing the floor space required for modification, thereby reducing the processing cost of the circuit boards.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. The setting of the exchange component enables the printing equipment to feed at least two circuit boards at a time, improving the efficiency of circuit board loading and processing. Moreover, adding printing equipment to a production line only requires adding an exchange device, reducing the need to modify other equipment on the production line and reducing the floor space required for modification, thereby reducing the processing cost of circuit boards.

[0036] 2. The setting of the plate changing claw, guide rail and support base: the plate changing claw slides along the surface of the support base towards the direction of the feed belt, and the bottom of the circuit board abuts against the surface of the feed belt, so as to realize the interchange of the position of the processed circuit board and the unprocessed circuit board;

[0037] 3. The installation of synchronous pulley one and synchronous belt one drives the support seat to slide in the opposite direction along the guide rail surface, eliminating the need to install a power device to drive each support seat, reducing energy consumption, and thus embodying the concept of energy saving. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure in the embodiments of this application.

[0039] Figure 2 This is a partial structural schematic diagram of the switching device in an embodiment of this application.

[0040] Figure 3 This is a partial cross-sectional view of the switching device in an embodiment of this application, mainly showing the startup component.

[0041] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0042] Explanation of reference numerals in the attached drawings: 1. Exchange device; 11. Base; 12. Exchange assembly; 121. Changing plate claw; 1211. Limiting flow channel; 1212. Clearance cavity; 1213. Sliding cavity; 1214. Pressure cavity; 1215. Deformation cavity; 122. Guide rail; 123. Support seat; 124. Synchronous pulley one; 125. Synchronous belt one; 13. Feed belt; 14. Discharge belt; 2. Screen printing machine body; 21. Processing part; 22. Rotating part; 23. Conveyor belt; 3. Circuit board; 4. Power assembly; 41. Power motor; 42. Synchronous pulley two; 43. Synchronous belt two; 5. Limiting bending plate; 6. Roller; 7. Starting assembly; 71. Connecting rope; 72. Elastic element one; 8. Suction cup; 9. Extrusion assembly; 91. Extrusion bar; 92. Ball bearing; 93. Elastic element two; 94. Pressure block; 941. Guide surface. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0044] This application discloses a high-precision screen printing device for circuit boards. (Refer to...) Figure 1 and Figure 2 The high-precision screen printing equipment for circuit boards includes an exchange device 1 and at least two screen printing machine bodies 2. The exchange device 1 is installed between the two screen printing machine bodies 2. One screen printing machine body 2 performs screen printing on one of the two circuit boards 3 and transfers both circuit boards 3 to the exchange device 1. The exchange device 1 swaps the positions of the two circuit boards 3 and transfers them to the other screen printing machine body 2, so that the position of the circuit board 3 is consistent with the processing end of the screen printing machine body 2, thereby ensuring the accuracy of the circuit board 3 during subsequent printing. The other screen printing machine body 2 performs screen printing on the other of the two circuit boards 3 and unloads it. This allows the printing equipment to feed at least two circuit boards 3 at a time, improving the efficiency of feeding and processing the circuit boards 3. Moreover, adding printing equipment to a production line only requires adding the exchange device 1, reducing the need to modify other equipment on the production line and reducing the floor space required for modification, thereby reducing the processing cost of the circuit boards 3.

[0045] Reference Figure 1 and Figure 2The screen printing machine body 2 includes a processing section 21, a rotating section 22, and multiple conveyor belts 23. The bottom of the processing section 21 abuts against the ground to form a support. The rotating section 22 is rotatably connected to the surface of the processing section 21. The rotation axis of the rotating section 22 is parallel to the height direction of the processing section 21. The number of conveyor belts 23 can be two, four, or more. In this embodiment, there are four conveyor belts 23. The four conveyor belts 23 are evenly installed on the surface of the rotating section 22 around the axis of the rotating section 22. Multiple negative pressure adsorption devices are installed around the axis of the rotating section 22 at intervals. Each negative pressure adsorption device corresponds to one of the conveyor belts 23. When the negative pressure adsorption device is activated, it can adsorb and fix the circuit board 3 on the surface of the conveyor belt 23, thereby achieving the positioning of the circuit board 3 on the conveyor belt 23.

[0046] Reference Figure 1 and Figure 2 The rotating part 22 is provided with a loading station, a processing station and a unloading station at intervals around its axis. The rotation of the rotating part 22 drives each conveyor belt 23 to pass through the loading station, the processing station and the unloading station in sequence. Two circuit boards 3 are placed at intervals on the surface of the conveyor belt 23 located at the loading station. The rotation of the rotating part 22 drives the conveyor belt 23 on the loading station to move to the processing station. The processing part 21 performs screen printing on one of the circuit boards 3 on the processing station. The rotation of the rotating part 22 drives the conveyor belt 23 on the processing station to move to the unloading station. The conveyor belt 23 on the unloading station rotates in the opposite direction to drive the circuit board 3 into the exchange device 1, realizing high-precision screen printing on one of the circuit boards 3.

[0047] Reference Figure 1 and Figure 2 The exchange device 1 includes a base 11, an exchange component 12, at least two feed belts 13, and at least two discharge belts 14. The base 11 is supported by the ground. In this embodiment, there are two feed belts 13 and two discharge belts 14. The two feed belts 13 are installed at intervals on the top surface of the base 11. The two feed belts 13 correspond one-to-one with two circuit boards 3 on the unloading station of one of the screen printing machine bodies 2. The conveyor belt 23 on the unloading station rotates in the opposite direction and conveys the circuit boards 3 to the surface of the feed belts 13. The two discharge belts 14 are installed at intervals on the top surface of the base 11. The feed belts 13 and the discharge belts 14 correspond one-to-one. The exchange component 12 is connected to the top surface of the base 11 and is located between the feed belts 13 and the discharge belts 14. The exchange component 12 swaps the circuit boards 3 on the two feed belts 13. The other end of the discharge belt 14 away from the feed belts 13 faces the feed station on the other screen printing machine body 2.

[0048] Reference Figure 1 and Figure 2When the exchange component 12 completes the exchange of circuit boards 3 on the two feed belts 13, the feed belt 13 drives the circuit board 3 to the surface of the discharge belt 14. The discharge belt 14 drives the circuit board 3 to the surface of the conveyor belt 23 of the other screen printing machine body 2's feeding station. The rotating part 22 rotates and drives the conveyor belt 23 of the feeding station to the processing station. The processing part 21 performs screen printing on the other circuit board 3 on the processing station. The rotating part 22 drives the conveyor belt 23 of the processing station to the unloading station. The conveyor belt 23 on the unloading station rotates in the opposite direction, driving the two circuit boards 3 on the conveyor belt 23 to unload. This enables the printing equipment to enter at least two circuit boards 3 at a time, improving the efficiency of feeding and processing the circuit boards 3. Moreover, adding printing equipment to a production line only requires adding the exchange device 1, reducing the modification of other equipment on the production line and reducing the floor space required for modification, thereby reducing the processing cost of the circuit boards 3.

[0049] Reference Figure 1 and Figure 2 The exchange assembly 12 includes at least two plate changing claws 121, at least two guide rails 122, at least two support seats 123, at least two synchronous pulleys 124, and a synchronous belt 125 used in conjunction with the synchronous pulleys 124. In this embodiment, the number of plate changing claws 121, guide rails 122, support seats 123, and synchronous pulleys 124 are all two. The two guide rails 122 are fixed at intervals on the surface of the base 11. The length direction of the guide rails 122 is parallel to the arrangement direction of the feed belt 13. The support seats 123 are parallel to the guide rails. 122 is slidably connected to the surface of guide rail 122. Two synchronous pulleys 124 are rotatably connected to the top surface of base 11 at intervals. The two synchronous pulleys 124 are located at both ends of the length direction of guide rail 122. Synchronous belt 125 is tensioned and connected to the two synchronous pulleys 124. Two support seats 123 are installed on both sides of synchronous belt 125 in a one-to-one correspondence. When the two synchronous pulleys 124 rotate on the top surface of base 11, they drive the two support seats 123 to slide in the opposite direction along the surface of guide rail 122 toward the adjacent feed belt 13.

[0050] Reference Figure 1 and Figure 2The changing claw 121 corresponds one-to-one with the support base 123 and is slidably connected to the surface of the support base 123. The sliding direction of the changing claw 121 is parallel to the height direction of the base 11. The support base 123 is equipped with a power assembly 4, which can drive the changing claw 121 to slide on the surface of the support base 123. The power assembly 4 includes a power motor 41, two synchronous pulleys 42, and a synchronous belt 43 used in conjunction with the synchronous pulleys 42. The power motor 41 is fixed to the surface of the support base 123 by bolts. The motor axis of the power motor 41 is parallel to the transmission direction of the feed belt 13. One of the synchronous pulleys 42 is coaxially fixed to the motor shaft of the power motor 41, and the other synchronous pulley 42 is rotatably connected to the surface of the support base 123. The synchronous belt 43 tensions and connects the two synchronous pulleys 42. The end of the changing claw 121 is mounted on the surface of the synchronous belt 43.

[0051] Reference Figure 1 and Figure 2 When the changing claw 121 corresponds one-to-one with the circuit board 3 of the feeding belt 13 and abuts against the bottom of the circuit board 3, the power motor 41 runs, driving the changing claw 121 to slide along the surface of the support base 123 away from the base 11. The top surface of the changing claw 121 lifts the circuit board 3 away from the surface of the feeding belt 13. The height at which one changing claw 121 lifts the circuit board 3 is higher than the height at which the other changing claw 121 lifts the circuit board 3. The synchronous wheel 124 rotates, driving the support base 123 to slide along the surface of the guide rail 122 towards the adjacent feeding belt 13, driving the changing claw 121 to slide towards the adjacent feeding belt 13. The changing claw 121 is located directly above the feeding belt 13. The power motor 41 runs in the opposite direction, driving the changing claw 121 to slide along the surface of the support base 123 towards the base 11. The bottom of the circuit board 3 on the changing claw 121 abuts against the surface of the feeding belt 13, realizing the interchange of the positions of the circuit boards 3 on the two feeding belts 13.

[0052] Reference Figure 2 and Figure 3 The top surface of the changing claw 121 is slidably connected to a limiting bent plate 5. The sliding direction of the limiting bent plate 5 is parallel to the conveying direction of the feeding belt 13. The top surface of the changing claw 121 is provided with a limiting flow channel 1211 for the limiting bent plate 5 to slide. When the limiting bent plate 5 slides along the inner wall of the limiting flow channel 1211 toward the suction cup 8, the plate surface of the limiting bent plate 5 and the plate surface of the changing claw 121 abut against both sides of the circuit board 3 to form a limit, so that the circuit board 3 is not easy to deviate on the changing claw 121, thereby improving the limiting stability of the circuit board 3 on the changing claw 121.

[0053] Reference Figure 2 and Figure 3A roller 6 is rotatably connected to the surface of the limiting bending plate 5 facing the bottom wall of the limiting flow channel 1211. The wheel surface of the roller 6 makes rolling contact with the bottom wall of the limiting flow channel 1211, and the rolling friction replaces the sliding friction, reducing the wear on the high-precision screen printing equipment of the circuit board, thereby extending the service life of the high-precision screen printing equipment of the circuit board. A starting component 7 is installed between the limiting bending plate 5 and the support base 123. The starting component 7 can control the sliding of the limiting bending plate 5. The starting component 7 includes a connecting rope 71 and an elastic element 72. The bottom wall of the limiting flow channel 1211 has a relief cavity 1212 for the sliding of the connecting rope 71. The relief cavity 1212 penetrates the bottom wall of the changing claw 121 along the depth direction. One end of the connecting rope 71 is fixed to the bottom of the limiting bending plate 5, and the other end of the connecting rope 71 is fixed to the top surface of the support base 123. The elastic element 72 can be a compression spring or a tension spring. In this embodiment, the elastic element 72 is a compression spring and has a certain deformation capacity.

[0054] Reference Figure 2 and Figure 3 One end of the elastic element 72 in the direction of elastic force is fixed to the inner wall of the limiting flow channel 1211, and the other end of the elastic element 72 in the direction of elastic force is fixed to the surface of the limiting bent plate 5. The elastic element has the elastic force to drive the limiting bent plate 5 to slide away from the circuit board 3, and the surface of the limiting bent plate 5 tends to detach from the surface of the circuit board 3. When the changing claw 121 slides along the surface of the support base 123 away from the base 11, the changing claw 121 lifts the circuit board 3 away from the surface of the feed belt 13, the distance between the limiting bent plate 5 and the support base 123 increases, and the limiting bent plate 5, under the tension of the connecting rope 71, slides along the inner wall of the limiting flow channel 1211 towards the circuit board 3, and the surface of the limiting bent plate 5 and the support base 123 detach from the circuit board 3. The changing claw 121 abuts against both sides of the circuit board 3 to form a limit. When the changing claw 121 slides along the surface of the support base 123 toward the base 11, the changing claw 121 lifts the circuit board 3 toward the surface of the feed belt 13. The distance between the limiting bent plate 5 and the support base 123 is reduced. The tension of the limiting bent plate 5 by the connecting rope 71 disappears. The elastic force of the elastic element 72 drives the limiting bent plate 5 to slide away from the circuit board 3. The surface of the limiting bent plate 5 is separated from the surface of the circuit board 3, so that the limiting effect of the limiting bent plate 5 on the circuit board 3 disappears. The bottom of the circuit board 3 abuts against the surface of the feed belt 13, realizing the stability of exchanging the circuit boards 3 on the two feed belts 13.

[0055] Reference Figure 3 and Figure 4A suction cup 8 is mounted on the surface of the board changing claw 121 facing the circuit board 3. The suction cup 8 can be made of rubber or silicone. In this embodiment, the suction cup 8 is made of rubber and has a certain deformation capability. A deformation cavity 1215 for the suction cup 8 to deform is opened on the surface of the board changing claw 121 facing the circuit board 3. The surface of the suction cup 8 can be adsorbed on the surface of the circuit board 3 to form a limit, making it difficult for the circuit board 3 to detach from the board changing claw 121, thereby improving the limiting stability of the circuit board 3 on the board changing claw 121.

[0056] Reference Figure 3 and Figure 4 An extrusion assembly 9 is installed between the limiting bending plate 5 and the suction cup 8. The extrusion assembly 9 can extrude the suction cup 8 to deform and adhere it to the surface of the circuit board 3 to form a positioning. The extrusion assembly 9 includes an extrusion strip 91, a ball 92, an elastic element 93, and a pressure block 94. The end of the extrusion strip 91 is integrally formed and fixed to the surface of the limiting bending plate 5 facing the suction cup 8. The inner wall of the limiting flow channel 1211 is provided with a sliding cavity 1213 for the extrusion strip 91 to slide. The sliding cavity 1213 is connected to the deformation cavity 1215. The ball 92 is rotatably connected to the suction cup 8 facing the sliding cavity 1215. At the bottom of 213, the second elastic element 93 can be a compression spring or a torsion spring. In this embodiment, the second elastic element 93 is a compression spring, which has a certain deformation capability. One end of the second elastic element 93 in the elastic direction is fixed to the inner wall of the deformation cavity 1215, and the other end of the second elastic element 93 in the elastic direction abuts against the surface of the ball 92. The second elastic element 93 has the elastic force to drive the ball 92 to slide towards the direction close to the sliding cavity 1213. The end of the ball 92 protrudes from the inner wall of the sliding cavity 1213, and the suction cup 8 surface contracts and deforms to recover towards the direction close to the deformation cavity 1215.

[0057] Reference Figure 3 and Figure 4 The bottom of the deformation cavity 1215 is provided with a pressure cavity 1214 for the pressure block 94 to slide. The pressure cavity 1214 penetrates the inner wall of the deformation cavity 1215 in the depth direction and connects to the sliding cavity 1213. The pressure block 94 is located on the side of the ball 92 near the extrusion strip 91. The end of the pressure block 94 protruding from the sliding cavity 1213 is provided with a guide surface 941. The guide surface 941 is in the shape of a rounded protrusion. The guide surface 941 can abut against the surface of the extrusion strip 91 and guide the pressure block 94 to slide towards the suction cup 8. The end of the pressure block 94 protruding from the deformation cavity 1215 extrudes the surface of the suction cup 8. The surface of the suction cup 8 is deformed by pressure and adsorbed on the surface of the circuit board 3 to form a limit.

[0058] Reference Figure 3 and Figure 4When the limiting bending plate 5 slides along the inner wall of the limiting flow channel 1211 toward the direction closer to the circuit board 3, it drives the extrusion strip 91 to slide along the inner wall of the sliding cavity 1213 toward the direction closer to the deformation cavity 1215. The guide surface 941 abuts against the surface of the extrusion strip 91 and guides the pressure block 94 to slide toward the direction closer to the suction cup 8. The end of the pressure block 94 protruding from the deformation cavity 1215 extrudes the surface of the suction cup 8. The surface of the suction cup 8 is deformed by pressure and adsorbed onto the surface of the circuit board 3 to form a limit. 91 continues to slide along the inner wall of the sliding cavity 1213 toward the direction of approaching the ball 92. The surface of the extrusion bar 91 rolls and contacts the spherical surface of the ball 92. The extrusion bar 91 drives the ball 92 to slide toward the direction of approaching the deformation cavity 1215. The surface of the suction cup 8 is deformed by the extrusion of the ball 92 and adsorbs onto the surface of the circuit board 3 to form a limit, so that the circuit board 3 is not easy to detach from the changing claw 121 when the changing claw 121 transports the circuit board 3, thereby improving the stability of the changing claw 121 in transporting the circuit board 3.

[0059] The implementation principle of a high-precision screen printing device for circuit boards according to an embodiment of this application is as follows: Two circuit boards 3 are placed at intervals on the surface of the conveyor belt 23 located at the loading station. The rotating part 22 rotates and drives the conveyor belt 23 at the loading station to move to the processing station. The processing part 21 performs screen printing on one of the circuit boards 3 at the processing station. The rotating part 22 rotates and drives the conveyor belt 23 at the processing station to move to the unloading station. The conveyor belt 23 at the unloading station rotates in the opposite direction and drives the circuit board 3 into the exchange device 1, realizing high-precision screen printing on one of the circuit boards 3. At the same time, the conveyor belt 23 at the unloading station rotates in the opposite direction and conveys the circuit boards 3 one by one to the surface of the feeding belt 13. The exchange component 12 completes the exchange of the circuit boards 3 on the two feeding belts 13. The feeding belt 13 drives the electric... The circuit board 3 is conveyed to the surface of the discharge belt 14. The discharge belt 14 drives the circuit board 3 to the surface of the conveyor belt 23 of the feeding station of another screen printing machine body 2. The rotating part 22 rotates and drives the conveyor belt 23 of the feeding station to move to the processing station. The processing part 21 performs screen printing on another circuit board 3 on the processing station. The rotating part 22 drives the conveyor belt 23 of the processing station to move to the unloading station. The conveyor belt 23 on the unloading station rotates in the opposite direction and drives the two circuit boards 3 on the conveyor belt 23 to unload. This enables the printing equipment to enter at least two circuit boards 3 at a time, improving the efficiency of feeding and processing the circuit boards 3. Moreover, adding printing equipment to a production line only requires adding the exchange device 1, reducing the modification of other equipment on the production line and reducing the floor space required for modification, thereby reducing the processing cost of the circuit boards 3.

[0060] This application also discloses a circuit board processing method using a high-precision screen printing device for circuit boards, comprising the following steps:

[0061] Circuit board 3 is loaded by placing two circuit boards 3 on the surface of the conveyor belt 23 at one of the loading stations of the screen printing machine body 2.

[0062] One of the circuit boards 3 is processed. The rotating part 22 drives the conveyor belt 23 on the loading station to move to the processing station. The processing part 21 performs screen printing on one of the circuit boards 3 on the processing station.

[0063] When the circuit board 3 is unloaded, the conveyor belt 23 drives the conveyor belt 23 of the processing station to move to the unloading station. The conveyor belt 23 of the unloading station rotates in the opposite direction, causing the two circuit boards 3 to enter the two feeding belts 13 one by one.

[0064] The positions of the circuit boards 3 are interchanged. The exchange component 12 interchanges the positions of the circuit boards 3 on the two feeding belts 13. The feeding belt 13 drives the circuit boards 3 to enter the surface of the discharge belt 14 one by one. The discharge belt 14 drives the circuit boards 3 to enter the surface of the conveyor belt 23 on the other screen printing machine body 2 feeding station.

[0065] Another circuit board 3 is processed. The rotating part 22 drives the conveyor belt 23 on the loading station to move to the processing station. The processing part 21 performs screen printing on another circuit board 3 at the processing station.

[0066] Circuit board 3 is unloaded. Conveyor belt 23 drives the processing station to move to the unloading station. Conveyor belt 23 on the unloading station rotates in the opposite direction to unload two circuit boards 3 one by one.

[0067] The implementation principle of a circuit board processing method in this application embodiment is as follows: the exchange component 12 interchanges the circuit boards 3 on the two feed belts 13, so that the position of the circuit board 3 is consistent with the processing end of the processing section 21, ensuring the accuracy of the circuit board 3 during subsequent printing, enabling the printing equipment to enter at least two circuit boards 3 at a time, improving the efficiency of feeding and processing the circuit boards 3, and when adding printing equipment to the integrated production line, only the exchange device 1 needs to be added, reducing the modification of other equipment on the production line, reducing the floor space required for modification, thereby reducing the processing cost of the circuit boards 3.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision screen printing equipment for circuit boards, characterized in that: The system includes an exchange device (1) and at least two screen printing machine bodies (2). The exchange device (1) is located between the two screen printing machine bodies (2). Each screen printing machine body (2) includes a processing section (21), a rotating section (22), and multiple conveyor belts (23). The rotating section (22) is rotatably connected to the surface of the processing section (21). The multiple conveyor belts (23) are spaced apart on the surface of the rotating section (22) around its axis. The surface of each conveyor belt (23) provides space for at least two circuit boards (…). 3) Placement: The rotating part (22) is provided with a loading station, a processing station and a unloading station at intervals around the axis of the rotating part (22). The rotating part (22) rotates and drives each conveyor belt (23) to pass through the loading station, the processing station and the unloading station in sequence. The conveyor belt (23) located at the loading station is used to load and place at least two circuit boards (3). The processing part (21) can perform screen printing on one of the circuit boards (3) at the processing station. The conveyor belt (23) located at the unloading station... The reverse rotation drives two circuit boards (3) closer to the exchange device (1). The exchange device (1) includes a base (11), an exchange component (12), at least two feed belts (13) and at least two discharge belts (14). At least two feed belts (13) are connected to the base (11) at intervals. Each feed belt (13) corresponds to a circuit board (3) on the unloading station. The exchange component (12) is connected to the base (11) and can exchange the circuit boards (3) on the two feed belts (13). At least two discharge belts (14) are connected to the base (11) at intervals. Each discharge belt (14) corresponds to a feed belt (13). The feed belt (13) drives the circuit board (3) into the surface of the discharge belt (14). The discharge belt (14) drives the circuit board (3) to another screen printing machine body (2). The processing unit (21) performs screen printing on another circuit board (3) at the processing station.

2. The high-precision screen printing equipment for circuit boards according to claim 1, characterized in that: The exchange assembly (12) includes at least two plate-changing claws (121), at least two guide rails (122), and at least two support seats (123). At least two guide rails (122) are spaced apart and connected to the surface of the base (11). The length direction of the guide rails (122) is parallel to the arrangement direction of the feed belt (13). The support seats (123) correspond one-to-one with the guide rails (122) and are slidably connected to the surface of the guide rails (122). The plate-changing claws (121) correspond one-to-one with the support seats (123) and are slidably connected to the surface of the support seats (123). The sliding direction of the plate-changing claws (121) is parallel to the height direction of the base (11). When the plate-changing claws (121) are aligned with the circuit board of the feed belt (13)... (3) When they correspond and abut, the plate changing claw (121) slides along the surface of the support base (123) away from the feed belt (13), and the plate changing claw (121) lifts the circuit board (3) away from the surface of the feed belt (13). One of the plate changing claws (121) is higher than the other plate changing claw (121). At least two of the support bases (123) slide along the surface of the guide rail (122) towards the adjacent feed belt (13), driving the plate changing claw (121) to move towards the adjacent feed belt (13). The plate changing claw (121) slides along the surface of the support base (123) towards the feed belt (13), and the circuit board (3) is placed on the surface of the feed belt (13).

3. The high-precision screen printing equipment for circuit boards according to claim 2, characterized in that: The exchange assembly (12) further includes at least two synchronous pulleys (124) and a synchronous belt (125) used in conjunction with the synchronous pulleys (124). The at least two synchronous pulleys (124) are rotatably connected to the surface of the base (11) at intervals. The at least two synchronous pulleys (124) are located at both ends of the length of the guide rail (122). The synchronous belt (125) is tensioned to connect the two synchronous pulleys (124). The at least two support seats (123) are connected one-to-one to both sides of the synchronous belt (125). When the synchronous pulleys (124) rotate, they drive the two support seats (123) to slide in the opposite direction along the surface of the guide rail (122).

4. The high-precision screen printing equipment for circuit boards according to claim 2, characterized in that: The support base (123) is connected to a power assembly (4). The power assembly (4) includes a power motor (41), at least two synchronous pulleys (42), and a synchronous belt (43) used in conjunction with the synchronous pulleys (42). The power motor (41) is connected to the surface of the support base (123). The motor axis of the power motor (41) and the conveying direction of the feed belt (13) are parallel to each other. One of the synchronous pulleys (42) is coaxially connected to the motor shaft of the power motor (41), and the other synchronous pulley (42) is rotatably connected to the surface of the support base (123). The synchronous belt (43) tensions the two synchronous pulleys (42). The plate changing claw (121) is connected to the surface of the synchronous belt (43). When the power motor (41) runs, it drives the plate changing claw (121) to slide along the surface of the support base (123).

5. The high-precision screen printing equipment for circuit boards according to claim 4, characterized in that: The surface of the board changing claw (121) is connected to a suction cup (8), and the surface of the suction cup (8) can be adsorbed onto the surface of the circuit board (3) to form a limit.

6. The high-precision screen printing equipment for circuit boards according to claim 5, characterized in that: The plate changing claw (121) is slidably connected to the limiting bent plate (5). The sliding direction of the limiting bent plate (5) is parallel to the conveying direction of the feed belt (13). When the limiting bent plate (5) slides towards the suction cup (8), the plate surface of the limiting bent plate (5) and the plate surface of the plate changing claw (121) abut against both sides of the circuit board (3) to form a limit.

7. The high-precision screen printing equipment for circuit boards according to claim 6, characterized in that: A starting assembly (7) is connected between the limiting bent plate (5) and the support base (123). The starting assembly (7) includes a connecting rope (71) and an elastic element (72). One end of the connecting rope (71) is connected to the surface of the support base (123), and the other end of the connecting rope (71) is connected to the surface of the limiting bent plate (5). One end of the elastic element (72) in the elastic direction is connected to the plate surface of the limiting bent plate (5), and the other end of the elastic element (72) in the elastic direction is connected to... The elastic element (72) attached to the plate surface of the plate changing claw (121) has an elastic force that drives the plate changing claw (121) to slide away from the suction cup (8). When the plate changing claw (121) slides away from the base (11) along the support seat (123), the connecting rope (71) drives the limiting bending plate (5) to slide towards the suction cup (8). The plate surface of the limiting bending plate (5) and the plate surface of the plate changing claw (121) abut against both sides of the circuit board (3) to form a limit.

8. The high-precision screen printing equipment for circuit boards according to claim 7, characterized in that: A pressing assembly (9) is connected between the limiting bending plate (5) and the suction cup (8). The pressing assembly (9) includes a pressing strip (91), a ball bearing (92), and an elastic element (93). The end of the pressing strip (91) is connected to the surface of the limiting bending plate (5) facing the suction cup (8). The plate changing claw (121) has a sliding cavity (1213) for the pressing strip (91) to slide. The plate changing claw (121) has a deformation cavity (1215) for accommodating the suction cup (8). The deformation cavity (1215) is connected to the sliding cavity (1213). The ball bearing (92) is rotatably connected to the bottom of the suction cup (8). One end of the elastic element (93) in the elastic direction is connected to the inner wall of the deformation cavity (1215). The other end of the elastic force direction is connected to the surface of the ball (92). The elastic element 2 (93) has the elastic force to drive the ball (92) to slide towards the sliding cavity (1213). The end of the ball (92) protrudes from the inner wall of the sliding cavity (1213), and the surface of the suction cup (8) contracts and recovers towards the deformation cavity (1215). When the extrusion strip (91) slides along the sliding cavity (1213) towards the deformation cavity (1215), the surface of the extrusion strip (91) rolls and contacts the spherical surface of the ball (92). The extrusion strip (91) drives the ball (92) to slide towards the deformation cavity (1215). The surface of the suction cup (8) is deformed by the extrusion of the ball (92) and adsorbed onto the surface of the circuit board (3) to form a limit.

9. The high-precision screen printing equipment for circuit boards according to claim 8, characterized in that: The extrusion assembly (9) also includes a pressure block (94). The inner wall of the deformation cavity (1215) is provided with a pressure cavity (1214) for the pressure block (94) to slide. The pressure cavity (1214) is connected to the sliding cavity (1213). The end of the pressure block (94) protruding from the sliding cavity (1213) is provided with a guide surface (941). The guide surface (941) is in the shape of a circular arc protrusion. The guide surface (941) can abut against the extrusion strip (91) and guide the pressure block (94) to slide towards the deformation cavity (1215). The end of the pressure block (94) protruding from the deformation cavity (1215) extrudes the surface of the suction cup (8) and drives the surface of the suction cup (8) to deform and adsorb the board surface of the circuit board (3) to form a limit.

10. A circuit board processing method, characterized in that: The high-precision screen printing equipment for circuit boards according to any one of claims 1-9 is used, comprising the following steps: Circuit board (3) loading: Place two circuit boards (3) on the surface of the conveyor belt (23) at one of the screen printing machine body (2) loading stations with intervals; One of the circuit boards (3) is processed. The rotating part (22) drives the conveyor belt (23) on the loading station to move to the processing station. The processing part (21) performs screen printing on one of the circuit boards (3) on the processing station. The circuit board (3) is unloaded, and the conveyor belt (23) drives the conveyor belt (23) of the processing station to move to the unloading station. The conveyor belt (23) on the unloading station rotates in the opposite direction, driving the two circuit boards (3) to enter the two feeding belts (13) one by one. The positions of the circuit boards (3) are interchanged. The exchange component (12) interchanges the positions of the circuit boards (3) on the two feed belts (13). The feed belt (13) drives the circuit boards (3) to enter the surface of the discharge belt (14) one by one. The discharge belt (14) drives the circuit boards (3) to enter the surface of the conveyor belt (23) on the other screen printing machine body (2) loading station. Another circuit board (3) is processed. The rotating part (22) drives the conveyor belt (23) on the loading station to move to the processing station. The processing part (21) performs screen printing on the other circuit board (3) on the processing station. The circuit board (3) is unloaded. The conveyor belt (23) drives the conveyor belt (23) of the processing station to move to the unloading station. The conveyor belt (23) on the unloading station rotates in the opposite direction to drive the two circuit boards (3) to be unloaded one by one.

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