A tin paste printing machine for Mini LED production

Abstract

The application discloses a tin paste printing machine for Mini LED production and relates to the technical field of printing machines.The horizontal screen wires and the vertical screen wires are staggered and arranged very densely, so that a steel screen similar to a screen window is formed.Tin paste with a proper capacity is discharged on the horizontal screen wires and the vertical screen wires.When a circuit board is moved to be attached to the bottom of the horizontal screen wires and the vertical screen wires, the circuit board bumps are inserted into the gaps between the horizontal screen wires and the vertical screen wires, and the horizontal screen wires and the vertical screen wires cover the non-printing area of the circuit board.The tin paste is pushed and scraped by a scraper, so that the tin paste is printed on the bumps of the circuit board.Combined with the effect of vibration before the bumps of the circuit board contact the horizontal screen wires and the vertical screen wires, the bumps can better penetrate the gaps of the horizontal screen wires and the vertical screen wires.The tin paste printing machine is suitable for circuit boards of different specifications, can be used for printing tin paste on circuit boards of different specifications, and has the advantages of wider applicability, simpler operation, higher printing efficiency and the like compared with the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing machines, in particular to a tin paste printing machine for MiniLED production. BACKGROUND

[0002] The tin paste printing machine for MiniLED production is a device specially designed for high-precision electronic manufacturing, which is used to accurately print tin paste on a circuit board to provide a basis for the mounting and welding of MiniLED chips. It mainly uses steel mesh printing technology to accurately coat tin paste on the PCB pads, providing a basis for chip die bonding and welding. Some "raised rods" on the circuit board are called bumps, which are the parts that need to be printed with tin paste. Tin paste is printed on the top of these bumps to play a welding role (tin paste melts to form a solder joint, firmly connecting the bump and the PCB pad to ensure electrical conduction) or a stress buffering role (tin paste can alleviate the mechanical stress caused by thermal expansion and contraction to improve connection reliability).

[0003] When the tin paste printing machine is in use, first install a steel mesh with gaps that are compatible with the parts of the circuit board that need to be printed with tin paste, calibrate the position, then place the circuit board on the liftable conveyor belt below the steel mesh. The conveyor belt drives the circuit board to move upwards so that it is tightly attached to the bottom of the steel mesh, making the parts of the circuit board that need to be printed with tin paste fit the gaps in the steel mesh. Use a scraper to press the tin paste on the steel mesh from left to right, so that the tin paste is printed on the circuit board through the steel mesh, achieving printing on the desired parts of the circuit board. The printing process is more intelligent and has the advantages of good printing effect and high efficiency.

[0004] The existing tin paste printing machine can achieve high-precision tin paste printing by installing a steel mesh that matches the printing area of the circuit board. However, when multiple different specifications of circuit boards need to be processed in a short period of time, since the positions of the bumps on different specifications of circuit boards are different, the original steel mesh needs to be frequently disassembled and replaced with a steel mesh that matches the new specification. This process consumes a lot of time and labor, thus reducing the overall printing efficiency.

[0005] In summary, the existing technology is difficult to adaptively print different specifications of circuit boards without changing the steel mesh, so the present application innovatively designs a tin paste printing machine for MiniLED production based on the existing technology. SUMMARY

[0006] The technical solution of the present application addresses the technical problem that the existing technical solution is too single, and provides a significantly different solution from the existing technology. Specifically, the purpose of the present application is to provide a tin paste printing machine for MiniLED production to solve the problem that one steel mesh is difficult to be applied to different specifications of circuit boards as mentioned in the background.

[0007] To achieve the above object, the present application provides the following technical scheme: a tin paste printing machine for Mini LED production, comprising a rack, a support frame arranged in the interior of the rack, a mounting frame fixed to the top of the rack, a fixing frame sliding on the top of the mounting frame, and a circuit board, further comprising:

[0008] A fixed conveyor and a displacement conveyor arranged on the support frame for conveying the circuit board;

[0009] A clamping component arranged on the top of the fixed conveyor and the displacement conveyor for flipping the circuit board based on the rising state;

[0010] An isolation component mounted on the mounting frame for adaptively and accurately brushing tin paste based on the specification of the circuit board;

[0011] A printing component mounted on the fixing frame for adaptively coating based on the height of the circuit board;

[0012] The clamping component comprises a lifting plate for driving the circuit board to vibrate;

[0013] The isolation component comprises staggered horizontal and vertical wire meshes;

[0014] The printing component comprises a scraper block that automatically expands and contracts based on the height of the circuit board.

[0015] Preferably, the interior of the rack is fixedly connected with a hydraulic cylinder;

[0016] The top of the hydraulic cylinder is fixedly connected with the support frame;

[0017] One side of the fixed conveyor is fixedly connected with a first electric push rod;

[0018] One end of the first electric push rod is fixedly connected with the displacement conveyor;

[0019] The displacement conveyor is slidingly connected with the support frame;

[0020] The fixed conveyor is fixedly connected with the support frame.

[0021] Preferably, the outer wall of the fixed conveyor is fixedly connected with an extension frame;

[0022] The extension frame is in "U" shape structure;

[0023] The other end of the extension frame is fixedly connected with the outer wall of the displacement conveyor.

[0024] Preferably, the clamping component further comprises a conveying plate arranged on the fixed conveyor and the displacement conveyor in mirror image;

[0025] The top of the conveying plate is provided with a groove, and the inner wall of the groove is fixedly connected with a first spring;

[0026] The top of the first spring is fixedly connected with the bottom of the lifting plate;

[0027] The top of the lifting plate penetrates the groove and extends to the outside of the conveying plate;

[0028] One side of the lifting plate is provided with a driving groove;

[0029] One side of the conveying plate is slidably connected with a clamping plate;

[0030] One side of the clamping plate is fixedly connected with a moving rod;

[0031] The inner wall of the groove is provided with a through groove, and the moving rod extends through the through groove and into the inside of the driving groove;

[0032] The moving rod is slidably connected with the driving groove.

[0033] Preferably, the driving groove is a "Z" shaped structure;

[0034] The clamping plate is an "L" shaped structure;

[0035] One end of the moving rod is provided with a ball.

[0036] Preferably, the isolation component further comprises a frame which is detachably installed on the mounting frame through bolts;

[0037] The bottom of the mounting frame is fixedly connected with a mounting plate, and the bottom of the mounting plate is provided with a passage;

[0038] The horizontal wire mesh and the vertical wire mesh are both slidably sleeved with the frame;

[0039] Both ends of the horizontal wire mesh are fixedly installed with first expansion plates;

[0040] One side of the first expansion plate is fixedly connected with a third spring, one end of the third spring is fixedly connected with the outer wall of the frame;

[0041] The bottom of the first expansion plate is fixedly connected with a guide plate;

[0042] One side of the guide plate is provided with a guide ball;

[0043] Both ends of the first expansion plate are fixedly connected with guide rods;

[0044] Both ends of the vertical wire mesh are fixedly connected with second expansion plates;

[0045] One side of the second expansion plate is fixedly connected with a guide block.

[0046] Preferably, the guide block is a "right triangle" structure;

[0047] The inclined surface of the guide block is provided with a guide sliding groove.

[0048] One end of the guide rod is in sliding connection with the guide sliding groove.

[0049] Preferably, the material of the horizontal wire and the vertical wire is rubber.

[0050] Preferably, the printing component further comprises a second electric push rod symmetrically arranged in the interior of the fixing frame.

[0051] The bottom of the second electric push rod is fixedly connected with a scraper.

[0052] The bottom of the scraper is provided with an expansion slot, and the inner wall of the expansion slot is uniformly fixedly connected with a second spring.

[0053] One end of the second spring is fixedly connected with one side of the scraping block.

[0054] Preferably, the scraper is in an inclined state.

[0055] One side of the scraping block is in an arc shape.

[0056] Compared with the prior art, the present application has the following advantages:

[0057] 1. By arranging the horizontal wire and the vertical wire in an interlaced manner and arranging them very densely, a steel mesh similar to a screen window is formed, the tin paste of a proper capacity is discharged on the horizontal wire and the vertical wire, when the circuit board is moved to be attached to the bottom of the horizontal wire and the vertical wire, the bumps of the circuit board are inserted into the gap between the horizontal wire and the vertical wire, the horizontal wire and the vertical wire cover the non-printing area of the circuit board, and the tin paste is pushed and scraped by the scraper, so that the tin paste is printed on the bumps of the circuit board, the bumps are better penetrated into the gap of the horizontal wire and the vertical wire through the effect of "vibration" before contacting the horizontal wire and the vertical wire, the device is applicable to circuit boards of different specifications, can print tin paste on circuit boards of different specifications, has the advantages of wider applicability, simpler operation, higher printing efficiency and the like compared with the prior art, and the overall printing efficiency is improved.

[0058] 2. The inclined state of the scraper makes the included angle between the scraping block and the surface of the horizontal wire and the vertical wire be an acute angle, when the scraping block scrapes the tin paste, the tin paste is pressed when being pushed and scraped, so that the tin paste is more completely printed on the bumps of the circuit board, when the circuit board with bumps of different heights is printed, the arc-shaped slope of the scraping block is retracted into the expansion slot due to the higher bumps, and the second spring is reset after the bumps, so that the device is applicable to circuit boards of more specifications, and the printing effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1A first perspective view of the structure of the present application.

[0060] Figure 2 A second perspective view of the structure of the present application.

[0061] Figure 3 An elevation view of the present application.

[0062] Figure 4 A side view of the present application.

[0063] Figure 5 A structure diagram of the rack in the present application.

[0064] Figure 6 A structure diagram of the fixed conveyor and displacement conveyor in the present application.

[0065] Figure 7 A side view of the fixed conveyor and displacement conveyor in the present application.

[0066] Figure 8 A structure diagram of the circuit board in the present application.

[0067] Figure 9 A side view of the circuit board in the present application.

[0068] Figure 10 A plan view of the lifting plate in the present application.

[0069] Figure 11 A structure diagram of the mounting rack and fixing rack in the present application.

[0070] Figure 12 A second perspective view of the mounting rack and fixing rack in the present application.

[0071] Figure 13 A plan view of the mounting rack and fixing rack in the present application.

[0072] Figure 14 A structure diagram of the fixing rack in the present application.

[0073] Figure 15 A structure diagram of the scraper in the present application.

[0074] Figure 16 A sectional view of the scraper in the present application.

[0075] Figure 17 A first perspective view of the structure of the frame in the present application.

[0076] Figure 18 A state diagram of the circuit board in the present application when the bumps are inserted into the gap between the horizontal mesh and the vertical mesh.

[0077] Figure 19 AFigure 18 Enlarged view of structure at A.

[0078] Figure 20 Second perspective view of the frame structure in the present application.

[0079] Figure 21 Top view of the frame in the present application.

[0080] Figure 22 Structure of the first expansion plate in the present application.

[0081] In the figure: 1, rack; 2, support frame; 3, hydraulic cylinder; 4, fixed conveyor; 41, first electric push rod; 42, displacement conveyor; 43, conveying plate; 431, clamping plate; 432, moving rod; 433, first spring; 434, lifting plate; 435, driving groove; 44, telescopic frame; 5, circuit board; 6, mounting frame; 61, mounting plate; 7, fixed frame; 71, second electric push rod; 72, scraper; 73, second spring; 74, scraping block; 8, frame; 81, horizontal mesh; 82, first expansion plate; 83, third spring; 84, guide plate; 85, guide ball; 86, guide rod; 87, vertical mesh; 88, second expansion plate; 89, guide block. DETAILED DESCRIPTION

[0082] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0083] Please refer to Figures 1 to 22 The present application provides a technical solution: a tin paste printing machine for MiniLED production, comprising a rack 1, a support frame 2 arranged inside the rack 1, a mounting frame 6 fixed to the top of the rack 1, a fixed frame 7 sliding on the top of the mounting frame 6, and a circuit board 5, further comprising:

[0084] A fixed conveyor 4 and a displacement conveyor 42 are arranged on the support frame 2 for conveying the circuit board 5;

[0085] Mirror image arrangement of the clamping component based on the lifting state on the top of the fixed conveyor 4 and the displacement conveyor 42 to move the circuit board 5;

[0086] An isolation component is installed on the mounting frame 6 to adapt to the specification of the circuit board 5 and accurately apply tin paste;

[0087] A printing component is installed on the fixed frame 7 to adapt to the height of the circuit board 5 and apply paint;

[0088] The clamping component comprises a lifting plate 434 for driving the circuit board 5 to vibrate;

[0089] The isolation component comprises transversal wires 81 and vertical wires 87 arranged alternately;

[0090] The printing component comprises a squeegee 74 capable of automatically expanding or contracting according to the height of the bumps of the circuit board 5.

[0091] In specific implementation, the fixed conveyor 4 and the displacement conveyor 42 are both existing devices, which will not be explained in detail. When working, the fixed conveyor 4 and the displacement conveyor 42 can convey the circuit board 5 through the internal conveyor belt, so as to convey the circuit board 5 to the required position. After the bump printing of the circuit board 5 is completed, the circuit board 5 can be conveyed to the required position of the next working procedure.

[0092] The inside of the rack 1 is fixedly connected with a hydraulic cylinder 3;

[0093] The top of the hydraulic cylinder 3 is fixedly connected with the support frame 2;

[0094] One side of the fixed conveyor 4 is fixedly connected with a first electric push rod 41;

[0095] One end of the first electric push rod 41 is fixedly connected with the displacement conveyor 42;

[0096] The displacement conveyor 42 is slidingly connected with the support frame 2;

[0097] The fixed conveyor 4 is fixedly connected with the support frame 2.

[0098] In specific implementation, the first electric push rod 41 is started, the first electric push rod 41 drives the displacement conveyor 42 to move, the distance between the fixed conveyor 4 and the displacement conveyor 42 is adjusted according to the size of the circuit board 5, so as to facilitate clamping the circuit board 5. The hydraulic cylinder 3 is started, the hydraulic cylinder 3 can drive the fixed conveyor 4 and the displacement conveyor 42 to move upward through the support frame 2, so as to move the circuit board 5 upward, and the circuit board 5 can be moved upward to the required printing position of the circuit board 5.

[0099] The outer wall of the fixed conveyor 4 is fixedly connected with an extension frame 44;

[0100] The extension frame 44 is in "U" shape structure;

[0101] The other end of the extension frame 44 is fixedly connected with the outer wall of the displacement conveyor 42.

[0102] In specific implementation, the middle horizontal rod of the extension frame 44 is a telescopic rod. When the displacement conveyor 42 moves to the position, the extension frame 44 will be telescopic under force, so as not to affect the normal displacement of the displacement conveyor 42.

[0103] The clamping component further comprises a conveying plate 43 arranged on the fixed conveyor 4 and the displacement conveyor 42 in a mirror image manner;

[0104] A groove is formed in the top of the conveying plate 43, and the inner wall of the groove is fixedly connected with a first spring 433;

[0105] The top of the first spring 433 is fixedly connected with the bottom of a lifting plate 434;

[0106] The top of the lifting plate 434 penetrates the groove and extends to the outside of the conveying plate 43;

[0107] A driving groove 435 is formed in one side of the lifting plate 434;

[0108] A clamping plate 431 is slidably connected to one side of the conveying plate 43;

[0109] A moving rod 432 is fixedly connected to one side of the clamping plate 431;

[0110] A through groove is formed in the inner wall of the groove, and the moving rod 432 extends through the through groove and into the inside of the driving groove 435;

[0111] The moving rod 432 is slidably connected with the driving groove 435.

[0112] In a specific implementation, the height of the telescopic frame 44 is higher than the height of the lifting plate 434. When the conveying plate 43 is conveyed, it will not be hindered by the telescopic frame 44. The circuit board 5 is placed on the clamping plate 431. The displacement conveyor 42 can drive the clamping plate 431 to move, so that the two clamping plates 431 move relatively, thereby clamping the circuit board 5. The fixed conveyor 4 and the displacement conveyor 42 are both provided with a conveying belt inside. The conveying belts inside the fixed conveyor 4 and the displacement conveyor 42 will rotate synchronously when the fixed conveyor 4 and the displacement conveyor 42 work. The conveying plate 43 is fixedly connected with the conveying belt. Therefore, the fixed conveyor 4 and the displacement conveyor 42 will convey the conveying plate 43 through the conveying belt when they work, thereby realizing the conveying of the circuit board 5.

[0113] Reference Figures 9-10 The driving groove 435 is in a "Z" shape;

[0114] The clamping plate 431 is in an "L" shape;

[0115] One end of the moving rod 432 is provided with a ball (not shown in the figure).

[0116] In specific implementation, when the moving rod 432 slides inside the driving groove 435, the ball rolls, thus the friction can be reduced and the jamming can be avoided. When the lifting plate 434 is forced to retract inside the recess, the moving rod 432 is guided by the inner wall of the driving groove 435 and limited by the through groove, and is forced to move horizontally and reciprocate in small amplitude.

[0117] The isolation component further comprises a frame 8 detachably mounted on the mounting rack 6 by bolts;

[0118] The bottom of the mounting rack 6 is fixedly connected with a mounting plate 61, and the bottom of the mounting plate 61 is provided with a passage;

[0119] The horizontal wire 81 and the vertical wire 87 are both slidingly sleeved with the frame 8;

[0120] Both ends of the horizontal wire 81 are fixedly installed with first expansion plates 82;

[0121] One side of the first expansion plate 82 is fixedly connected with a third spring 83, one end of the third spring 83 is fixedly connected with the outer wall of the frame 8;

[0122] The bottom of the first expansion plate 82 is fixedly connected with a guide plate 84;

[0123] One side of the guide plate 84 is provided with guide balls 85;

[0124] Both ends of the first expansion plate 82 are fixedly connected with guide rods 86;

[0125] Both ends of the vertical wire 87 are fixedly connected with second expansion plates 88;

[0126] One side of the second expansion plate 88 is fixedly connected with a guide block 89.

[0127] In specific implementation, when the hydraulic cylinder 3 drives the fixed conveyor 4 and the displacement conveyor 42 to move upwards, the lifting plate 434 will first contact the frame 8 before the convex points of the circuit board 5 contact the horizontal wire 81 and the vertical wire 87, the lifting plate 434 is limited by the frame 8 and retracts inside the recess, the circuit board 5 continues to move upwards, in this process, because the moving rod 432 is guided by the inner wall of the driving groove 435 and limited by the through groove, and is forced to move horizontally and reciprocate in small amplitude, so the circuit board 5 moves horizontally and reciprocates in small amplitude with the clamping plate 431 in this process, when the convex points of the circuit board 5 are hindered by the horizontal wire 81 or the vertical wire 87 in the process of penetrating the gap between the horizontal wire 81 and the vertical wire 87, the effect of "vibration" is achieved by moving horizontally and reciprocating in small amplitude, so that the convex points of the circuit board 5 can better penetrate the gap between the horizontal wire 81 and the vertical wire 87, and hard penetration to damage the convex points of the circuit board 5 is avoided.

[0128] It should be noted that the third spring 83 is arranged between the second expansion plate 88 and the frame 8, and the first expansion plate 82 and the second expansion plate 88 are reset by the third spring 83 after being moved and not being subjected to force, and the telescopic rods are fixedly connected between the first expansion plate 82 and the second expansion plate 88 and the frame 8, and the first expansion plate 82 and the second expansion plate 88 can only move horizontally when being moved.

[0129] The guide block 89 is in a “right-angled triangle” structure.

[0130] The inclined surface of the guide block 89 is provided with a guide sliding groove.

[0131] One end of the guide rod 86 is slidably connected with the guide sliding groove.

[0132] In a specific implementation, when the fixed conveyor 4 and the displacement conveyor 42 move upward, the telescopic frame 44 moves upward together, and the telescopic frame 44 penetrates the passage on the mounting plate 61 and contacts the guide ball 85, and when the telescopic frame 44 continues to move upward, the first expansion plate 82 is forced to move in the opposite direction of the frame 8 through the arc surface of the guide ball 85, and since the guide block 89 is in a “right-angled triangle” structure, the trajectory of the guide rod 86 is horizontal, so the second expansion plate 88 is forced to move in the opposite direction of the frame 8, and the first expansion plate 82 and the second expansion plate 88 are stretched when moving, respectively, the horizontal wire 81 and the vertical wire 87, and when the horizontal wire 81 and the vertical wire 87 are locally deformed for a long time and thus slow to recover, the stretching process can accelerate the recovery of the horizontal wire 81 and the vertical wire 87 (when the horizontal wire 81 and the vertical wire 87 are locally deformed for a long time, the molecular chains inside the horizontal wire 81 and the vertical wire 87 will gradually undergo “stress relaxation” due to external force, that is, the force required to maintain the current deformation will gradually decrease over time, and the conformation of the molecular chains will adjust to a non-equilibrium state, resulting in slow recovery of local deformation, and the sudden rapid external force impact will break the original balance of the molecular chains, and the molecular chains are forced to rearrange from a non-equilibrium conformation to a more disordered state with a higher entropy value, thereby releasing the stored elastic potential energy and making the deformed part quickly rebound to restore the original state together with the whole, which is an entropy-driven elastic recovery process), and the horizontal wire 81 and the vertical wire 87 are further tightened when the circuit board 5 protrusions are inserted into the gaps, so as to better cover the non-printed area of the circuit board 5.

[0133] The horizontal wire 81 and the vertical wire 87 are both made of rubber material.

[0134] In specific implementation, the horizontal wire 81 and the vertical wire 87 can also be metal materials with elasticity, the third spring 83 is in compression state, the horizontal wire 81 and the vertical wire 87 are in tension state, the horizontal wire 81 and the vertical wire 87 are staggered and arranged very densely, and the horizontal wire 81 and the vertical wire 87 are still deformed slightly when subjected to force, so that the circuit board 5 can penetrate the gap of the horizontal wire 81 and the vertical wire 87.

[0135] The printing part further comprises a second electric push rod 71 symmetrically arranged inside the fixed frame 7.

[0136] The bottom of the second electric push rod 71 is fixedly connected with a scraper 72.

[0137] The bottom of the scraper 72 is provided with an expansion slot, and the inner wall of the expansion slot is uniformly fixedly connected with a second spring 73.

[0138] One end of the second spring 73 is fixedly connected with one side of a scraping block 74.

[0139] In specific implementation, the fixed frame 7 is slidingly connected to the top of the mounting frame 6 through a driving device, which is a mature driving mechanism, such as an electric rod, a pneumatic cylinder, etc. The working of the driving device can drive the fixed frame 7 to slide back and forth on the top of the mounting frame 6. Starting the second electric push rod 71 can drive the scraper 72 to move downward, so that the scraping block 74 contacts the surface of the horizontal wire 81 and the vertical wire 87. The existing tin paste discharging mechanism first discharges some appropriate amount of tin paste on the horizontal wire 81 and the vertical wire 87. The second electric push rod 71 on one side drives the scraper 72 to contact the surface of the horizontal wire 81 and the vertical wire 87. The driving device on the fixed frame 7 drives the fixed frame 7 to move. At this time, the scraping block 74 can push the tin paste and print the tin paste on the protrusion of the circuit board 5 when passing through the protrusion. When the fixed frame 7 moves back to the original position, the second electric push rod 71 retracts to make the scraping block 74 move upward and separate from the tin paste. At this time, another second electric push rod 71 is started to make another scraping block 74 contact the surface of the horizontal wire 81 and the vertical wire 87. When the fixed frame 7 moves back to the original position, the scraping block 74 can push the tin paste and print the tin paste on the protrusion of the circuit board 5 again.

[0140] The scraper 72 is inclined;

[0141] One side of the scraping block 74 is arc-shaped.

[0142] In a specific implementation, the inclined state of the scraper 72 makes the included angle between the scraper block 74 and the surface of the horizontal wire 81 and the vertical wire 87 an acute angle. When the scraper block 74 is used to scrape the tin paste, it will have a pressure on the tin paste when it is pushed to scrape the tin paste. Therefore, the tin paste can be more completely printed on the bumps of the circuit board 5. When the circuit board 5 with bumps of different heights is printed, the curved slope of the scraper block 74 will be retracted to the inside of the telescopic slot due to the higher bumps. After passing the bumps, it is reset by the second spring 73, so that the specifications of the circuit board 5 printed by the device are more comprehensive.

[0143] Working principle: when using the tin paste printing machine for Mini LED production, first start the first electric push rod 41, the first electric push rod 41 drives the displacement conveyor 42 to move, adjust the distance between the fixed conveyor 4 and the displacement conveyor 42 according to the size of the circuit board 5, place the circuit board 5 on the clamping plate 431, the displacement conveyor 42 moves to clamp the circuit board 5 with the two clamping plates 431, the fixed conveyor 4 and the displacement conveyor 42 inside the conveyor belt to convey the circuit board 5 to the bottom of the horizontal wire 81 and the vertical wire 87, the hydraulic cylinder 3 moves the circuit board 5 upwards through the fixed conveyor 4 and the displacement conveyor 42, moves the circuit board 5 upwards to fit the bottom of the horizontal wire 81 and the vertical wire 87, the bumps of the circuit board 5 penetrate the gap of the horizontal wire 81 and the vertical wire 87. It should be noted that after most of the bumps of the circuit board 5 penetrate the gap of the horizontal wire 81 and the vertical wire 87, the top of the bumps is mostly at the same horizontal line as the top of the horizontal wire 81 and the vertical wire 87. If the height of the bumps is inconsistent, the higher bumps will only protrude a little relative to the horizontal wire 81 and the vertical wire 87.

[0144] The telescopic frame 44 moves upwards with the circuit board 5, before the bumps of the circuit board 5 penetrate the gap of the horizontal wire 81 and the vertical wire 87, the telescopic frame 44 will first penetrate the channel on the mounting plate 61 and force the first expansion plate 82 to move in the opposite direction of the frame 8 through the guide ball 85. Since the guide block 89 is a "right triangle" structure, the trajectory of the guide rod 86 is horizontal, so it will force the second expansion plate 88 to move in the opposite direction of the frame 8. The first expansion plate 82 and the second expansion plate 88 will stretch the horizontal wire 81 and the vertical wire 87 respectively when they move. When the horizontal wire 81 and the vertical wire 87 are locally deformed for a long time and recover slowly, this stretching process can quickly restore the deformed parts of the horizontal wire 81 and the vertical wire 87, so that the horizontal wire 81 and the vertical wire 87 are in a more tense state before printing the circuit board 5, and the situation that the horizontal wire 81 and the vertical wire 87 cannot better cover the non-printing area of the circuit board 5 due to relaxation will not occur.

[0145] Before the bump contacts of the circuit board 5 contact the horizontal wire mesh 81 and the vertical wire mesh 87, the lifting plate 434 will first be limited by the frame 8 to retract into the interior of the groove. In this process, the moving rod 432 is guided by the inner wall of the driving groove 435 and is limited by the through groove to be forced to move horizontally and reciprocally in a small range. Therefore, when the moving rod 432 is hindered by the horizontal wire mesh 81 or the vertical wire mesh 87, the moving rod 432 can achieve the effect of "vibration" through the small-range horizontal and reciprocal movement, so as to achieve better penetration of the bump contacts of the circuit board 5 through the gaps of the horizontal wire mesh 81 and the vertical wire mesh 87, and avoid damage to the bump contacts of the circuit board 5 caused by hard penetration.

[0146] The existing tin paste discharging mechanism discharges some appropriate capacity of tin paste on the horizontal wire mesh 81 and the vertical wire mesh 87. The second electric push rod 71 on one side drives the scraper 72 to contact the surface of the horizontal wire mesh 81 and the vertical wire mesh 87. The fixed frame 7 moves to drive the scraping block 74 to push the tin paste. When the circuit board 5 bump contacts the tin paste, the tin paste can be printed on the bump contacts. When the fixed frame 7 moves back to the reset position, the second electric push rod 71 is retracted to move the scraping block 74 upward and away from the tin paste. At this time, another second electric push rod 71 is started to make the scraping block 74 in the opposite position contact the surface of the horizontal wire mesh 81 and the vertical wire mesh 87. When the fixed frame 7 moves back to the reset position, the scraping block 74 can push the tin paste to achieve the secondary printing of the circuit board 5 bump contacts.

[0147] It should be noted that the horizontal wire mesh 81 and the vertical wire mesh 87 are staggered and arranged very densely. The tin paste has a certain viscosity, and the tin paste will not leak through the gaps between the horizontal wire mesh 81 and the vertical wire mesh 87. The circuit board 5 bump contacts need to be printed with tin paste, and the influence of the thickness difference of the printed tin paste can be ignored. When the circuit board 5 bump contacts move downward and away from the horizontal wire mesh 81 and the vertical wire mesh 87, the horizontal wire mesh 81 and the vertical wire mesh 87 will be reset due to their own elastic force. When the horizontal wire mesh 81 and the vertical wire mesh 87 rub against the circuit board 5 bump contacts, a small amount of tin paste may be scraped off. The scraped-off tin paste will have little effect on the printing effect of the circuit board 5.

[0148] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some of the technical features, as long as the modifications, equivalent replacements, improvements, etc. are within the spirit and principles of the present application. Any modifications, equivalent replacements, improvements, etc. should be included in the protection scope of the present application.

Claims

1. A solder paste printing machine for MiniLED production, comprising a frame (1), a support frame (2) disposed inside the frame (1), a mounting frame (6) fixed to the top of the frame (1), a fixing frame (7) sliding on the top of the mounting frame (6), and a circuit board (5), characterized in that: Also includes: A fixed conveyor (4) and a displacement conveyor (42) are mounted on the support frame (2) for conveying the circuit board (5). The mirror image is set on the top of the fixed conveyor (4) and the displacement conveyor (42) based on the rising state of the toggle circuit board (5) clamping component; An isolation component mounted on a mounting bracket (6) with adaptive and precise solder paste application based on the specifications of the circuit board (5); Printed components mounted on a mounting bracket (7) with adaptive coating based on the bump height of the circuit board (5); The clamping component includes a lifting plate (434) for driving the circuit board (5) to vibrate. The isolation component includes interlaced horizontal wires (81) and vertical wires (87). The printing component includes a scraper (74) that automatically extends and retracts based on the height of the bumps on the circuit board (5); the clamping component also includes a conveyor plate (43) mirror-mounted on the fixed conveyor (4) and the displacement conveyor (42). The top of the conveyor plate (43) is provided with a groove, and the inner wall of the groove is fixedly connected with a first spring (433). The top of the first spring (433) is fixedly connected to the bottom of the lifting plate (434); The top of the lifting plate (434) extends through the groove and to the outside of the conveyor plate (43); A drive groove (435) is provided on one side of the lifting plate (434); A clamping plate (431) is slidably connected to one side of the conveyor plate (43). A movable rod (432) is fixedly connected to one side of the clamping plate (431). The inner wall of the groove is provided with a through groove, and the moving rod (432) extends through the through groove into the interior of the drive groove (435); The movable rod (432) is slidably connected to the drive groove (435); The drive groove (435) has a "Z" shaped structure; The clamping plate (431) has an "L" shaped structure; One end of the movable rod (432) is provided with a ball bearing; The isolation component also includes a frame (8) that is detachably mounted on the mounting bracket (6) by bolts; The bottom of the mounting bracket (6) is fixedly connected to a mounting plate (61), and a channel is provided at the bottom of the mounting plate (61). The horizontal wire (81) and vertical wire (87) are slidably sleeved with the frame (8); Both ends of the transverse mesh (81) are fixedly installed with first expansion plates (82); A third spring (83) is fixedly connected to one side of the first expansion plate (82), and one end of the third spring (83) is fixedly connected to the outer wall of the frame (8); A guide plate (84) is fixedly connected to the bottom of the first expansion plate (82); One side of the guide plate (84) is provided with guide balls (85); Guide rods (86) are fixedly connected to both ends of the first expansion plate (82); Both ends of the vertical wire mesh (87) are fixedly connected to a second expansion plate (88); A guide block (89) is fixedly connected to one side of the second expansion plate (88); The guide block (89) has a right-angled triangle structure; The inclined surface of the guide block (89) is provided with a guide groove; One end of the guide rod (86) is slidably connected to the guide groove.

2. The solder paste printing machine for MiniLED production according to claim 1, characterized in that: A hydraulic cylinder (3) is fixedly connected inside the frame (1); The top of the hydraulic cylinder (3) is fixedly connected to the support frame (2); A first electric push rod (41) is fixedly connected to one side of the fixed conveyor (4). One end of the first electric push rod (41) is fixedly connected to the displacement conveyor (42); The displacement conveyor (42) is slidably connected to the support frame (2); The fixed conveyor (4) is fixedly connected to the support frame (2).

3. The solder paste printing machine for MiniLED production according to claim 2, characterized in that: The outer wall of the fixed conveyor (4) is fixedly connected to a telescopic frame (44). The telescopic frame (44) has a "U" shaped structure; The other end of the telescopic frame (44) is fixedly connected to the outer wall of the displacement conveyor (42).

4. The solder paste printing machine for MiniLED production according to claim 1, characterized in that: Both the horizontal wire (81) and the vertical wire (87) are made of rubber.

5. A solder paste printing machine for MiniLED production according to claim 1, characterized in that: The printing component also includes a second electric push rod (71) symmetrically arranged inside the fixing frame (7); A scraper (72) is fixedly connected to the bottom of the second electric push rod (71); The bottom of the scraper (72) is provided with a telescopic groove, and the inner wall of the telescopic groove is uniformly and fixedly connected with a second spring (73). One end of the second spring (73) is fixedly connected to one side of the scraper (74).

6. A solder paste printing machine for MiniLED production according to claim 5, characterized in that: The scraper (72) is inclined; One side of the scraper (74) is an arc-shaped slope.

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