Printing device with guide conveying mechanism

Abstract

The invention relates to the technical field of printing devices, in particular to a printing device with a guiding and conveying mechanism, which comprises a first bracket, a PCB (printed circuit board) is mounted at the upper end of the first bracket through a vacuum chuck, and two groups of symmetrical V-shaped board dividing grooves are formed in each of the upper end and the lower end of the PCB; the upper end of the first support is rotationally connected with a second support through a rotating shaft, a first motor is installed at the upper end of the second support, and a guiding mechanism for guiding and conveying a printed PCB is arranged at the position, close to the front end, of the upper end of the second support. A maintenance mechanism used for detecting the edge quality of a PCB is installed at the position, close to the middle, of the upper end of the second support, rotation of an annular plate and a fan-shaped plate is matched with a positioning wheel, the printing stroke error of a solder paste box is controlled, the solder paste coating position precision is ensured, an arc-shaped pressing plate is driven by an installation rotating shaft to periodically scrape off solder paste, and the PCB edge quality is detected. And through elastic pressing of a second spring, residual solder paste on the surface of the steel mesh is removed, and mesh holes are prevented from being blocked by dry paste.

Description

Technical Field

[0001] The present invention relates to the technical field of printing devices, and in particular to a printing device with a guiding and conveying mechanism. Background Art

[0002] As electronic devices evolve towards miniaturization and higher density, the design complexity of printed circuit boards (PCBs) has increased significantly. PCBs with V-shaped splitter grooves, in particular, are widely used in consumer electronics, computers, and other fields. These types of PCBs face multiple technical challenges during screen printing.

[0003] During traditional screen printing, solder paste easily seeps into the V-grooves, causing solder joints to break during board separation. While solder mask can be used for filling, manual dispensing can lead to uneven thickness and slow curing, severely impacting production line efficiency. Furthermore, for ultra-thin PCBs (thickness ≤ 0.4mm), the traditional cam-link drive printing mechanism has significant flaws. Vertical impact acceleration can cause the solder paste tank to shift position, leading to solder paste accumulation or missed prints in the pad area. This is particularly true near the V-grooves, where reduced board rigidity results in a high defect rate. Furthermore, the high-density PCB stencil aperture diameter is easily clogged by solder paste residue or dust during printing, and existing cleaning technologies struggle to completely remove organic matter from the micropores, resulting in poor printing results. In addition, the alignment of the steel mesh and the PCB relies on manual visual inspection, and the deviation tolerance is only ±0.5mm, which is difficult to meet the high-precision industrial requirements. The burrs on the edge of the PCB can easily cause short circuits. However, the traditional process requires separate polishing and gluing after printing, resulting in discrete processes, large equipment footprint, and time and space asynchrony, which can easily cause secondary pollution. To this end, we propose a printing device with a guiding and conveying mechanism. Summary of the Invention

[0004] In order to remedy the deficiencies of the prior art and solve at least one technical problem raised in the background art, the present invention proposes a printing device having a guiding and conveying mechanism.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a printing device with a guiding and conveying mechanism, comprising a first bracket, a PCB board is installed on the upper end of the first bracket through a vacuum suction cup, two groups of symmetrical V-shaped board separation grooves are provided at the upper and lower ends of the PCB board, the upper end of the first bracket is rotatably connected to the second bracket through a rotating shaft, a first motor is installed on the upper end of the second bracket, a guiding mechanism for guiding and conveying the printed PCB board is provided near the front end of the upper end of the second bracket, and a maintenance mechanism for PCB board edge processing and solder mask filling is installed near the middle of the upper end of the second bracket.

[0006] Preferably, the guiding mechanism includes a printing assembly for printing solder paste on the PCB board, and the guiding mechanism also includes a detection mechanism for detecting and cleaning the steel mesh.

[0007] The transmission mechanism that this second end is connected with this second end is that the cam is fixed on the support frame, and this second end has a cylinder pressure, and this cylinder pressure bar connects with the support frame, and this second end has a cylinder pressure, and this cylinder pressure bar connects with the support frame.

[0008] Preferably, the front end of the mounting plate is fixedly connected to two groups of symmetrical buffer rods, the outer sides of the two groups of buffer rods are slidably connected to a connecting plate, the rear end of the connecting plate is fixedly connected to the mounting plate, and a first spring is provided on the outer side of the buffer rod, one end of the first spring is fixedly connected to the connecting plate, and the other end of the first spring is fixedly connected to the mounting plate.

[0009] Preferably, the detection mechanism includes a second motor installed on one side of the solder paste box, the output shaft of the second motor is fixedly connected to the mounting shaft, the mounting shaft is rotatably connected to the inner side of the solder paste box, the outer side of the mounting shaft is fixedly connected to four groups of rotating plates, the outer side of the rotating plate is slidably connected to a slide plate, the other end of the slide plate is fixedly connected to an arc-shaped pressure plate, and multiple groups of second springs are provided on the inner side of the slide plate, one end of the second spring is fixedly connected to the slide plate, and the other end of the second spring is fixedly connected to the rotating plate.

[0010] Preferably, the other end of the mounting shaft is fixedly connected to a first spur gear, the outer side of the first spur gear is rotatably connected to a first chain, the inner side of the first chain is rotatably connected to a second spur gear, one end of the second spur gear is fixedly connected to a opposing threaded rod, both ends of the opposing threaded rod are rotatably connected to the solder paste box, the outer side of the solder paste box is respectively threadedly connected to two groups of moving blocks through opposing threads, the front end of the moving block is in contact with the solder paste box, the lower end of the moving block is provided with a roller, the rear end of the moving block is fixedly connected to a CCD camera, the lower end of the CCD camera is provided with a ring light bar, the upper end of the CCD camera is installed with a third motor, the output shaft of the third motor is fixedly connected to a connecting shaft, the upper end of the connecting shaft is fixedly connected to a third spur gear, the outer side of the third spur gear is rotatably connected to the second chain, the inner side of the second chain is rotatably connected to a fourth spur gear, the lower end of the fourth spur gear is rotatably connected to the first stirring rod, the outer side of the first stirring rod is rotatably connected to an antistatic liquid tank, and the lower end of the antistatic liquid tank is fixedly connected to the moving block.

[0011] Preferably, an L-shaped connecting rod is fixedly connected to the outer side of the connecting shaft, a cleaning rod is fixedly connected to the lower end of the L-shaped connecting rod, and the inner side of the cleaning rod is slidably connected to the light bar of the CCD camera.

[0012] Preferably, the lower end of the cleaning rod is rotatably connected to a fifth spur gear through a rotating shaft, the lower end of the fifth spur gear is installed with a solenoid valve atomizing spray head, the input port of the solenoid valve atomizing spray head is fixedly connected to the antistatic liquid tank through a pipe, and the lower end of the solenoid valve atomizing spray head is installed with multiple groups of electric telescopic rods, the output shaft of the electric telescopic rod is fixedly connected to a soft brush, and the soft brush passes through the steel mesh, the outer side of the fifth spur gear is meshed with the sixth spur gear, and the inner side of the sixth spur gear is fixedly connected to the outer side of the CCD camera.

[0013] Preferably, the maintenance mechanism includes two groups of symmetrical first oil hydraulic rods, the front ends of the two groups of first oil hydraulic rods are fixedly connected to the solder paste box, the outer sides of the two groups of first oil hydraulic rods are slidably connected with oil hydraulic tubes, the rear ends of the first oil hydraulic rods are fixedly connected with sealing rings, the oil hydraulic tubes are fixedly connected to the inner side of the first bracket, the inner side of the oil hydraulic tubes are fixedly connected with two groups of symmetrical limit strips, the other end of the oil hydraulic tubes is slidably connected to the second oil hydraulic rod, the rear end of the second oil hydraulic rod is fixedly connected with a sealing ring, and the front end of the second oil hydraulic rod is fixedly connected to the third bracket.

[0014] Preferably, the inner side of the third bracket is rotatably connected to two sets of symmetrical first bevel gears, the outer sides of the two sets of first bevel gears are provided with friction plates, the outer sides of the two sets of first bevel gears are commonly meshed and connected with the second bevel gear, the second bevel gear is rotatably connected to the inner side of the third bracket, the other end of the second bevel gear is fixedly connected to the exhaust pipe, the inner wall of the exhaust pipe is provided with a guide groove, the lower end of the third bracket is installed with a fourth motor, the output shaft of the fourth motor is fixedly connected to one set of the first bevel gears in the two sets of first bevel gears, and the other set of the first bevel gears in the two sets of The upper end of the second stirring rod is fixedly connected to the second stirring rod, the inner side of the second stirring rod is provided with a heating tube, the outer side of the second stirring rod is rotatably connected to the solder resist glue tank, the lower end of the solder resist glue tank is fixedly connected to the third bracket, and two groups of symmetrical second solenoid valve spray heads are installed on the inner side of the third bracket, the second solenoid valve spray heads are fixedly connected to the solder resist glue tank through pipes, and the close ends of the two groups of second solenoid valve spray heads are fixedly connected with triangular push blocks, and the output port of the second solenoid valve spray head passes through the triangular push block, and the two groups of triangular push blocks are slidably connected to the inner side of the V-shaped board dividing groove of the PCB board.

[0015] Compared with the prior art, the present invention provides a printing device with a guide conveying mechanism, which has the following beneficial effects: 1. Through the cooperation between the rotation of the annular plate and the sector plate and the positioning wheel, the rotary motion is converted into the linear reciprocating motion of the mounting plate, the printing stroke error of the solder paste box is controlled, and the accuracy of the solder paste coating position is ensured. The elastic damping system composed of the buffer rod and the first spring can absorb the vertical impact when the mounting plate is lifted, avoiding solder paste accumulation or missing printing due to sudden position changes of the solder paste box. It is especially suitable for the printing process of ultra-thin PCB boards with a thickness of ≤0.4mm.

[0016] 2. The arc-shaped pressure plate is driven by a rotating shaft to periodically scrape off the solder paste. The elastic compression of the second spring removes residual solder paste from the surface of the steel mesh to prevent dry paste from clogging the mesh. The electric telescopic rod drives the soft brush to penetrate the micropores of the steel mesh. The anti-static cleaning fluid sprayed by the solenoid valve atomizing spray head removes organic residue through the dual effects of mechanical friction and chemical cleaning, solving the problem of mesh clogging. The CCD camera and the ring light bar can identify mesh blockage or offset. The image processing algorithm realizes automatic alignment of the steel mesh and the PCB pad, and triggers the first motor to dynamically adjust the printing phase, reducing the time of manual first-piece debugging. The microfiber material of the cleaning rod and the rotation of the fifth spur gear can remove dust and solder paste splashes from the surface of the CCD camera lens, avoiding misjudgment of defects due to optical contamination.

[0017] 3. The movement of the solder paste box drives the first hydraulic rod and the second hydraulic rod to be linked, so that the position error of the third bracket and the printing head is less than 0.2mm, ensuring the time and space synchronization of the polishing, gluing and printing processes. It is suitable for the efficient operation of the dual-track parallel production line. The two sets of counter-rotating first bevel gears polish the PCB edge through the friction plate to reduce the edge roughness and avoid the risk of short circuit caused by burrs. The solder mask is filled through the second solenoid valve spray head, and the scraping effect of the triangular push block is combined to improve the uniformity of the glue layer thickness in the V-shaped depaneling groove, preventing solder joint breakage during depaneling. The guide groove design of the exhaust pipe generates a centrifugal airflow with a high flow rate, which can remove particulate contaminants on the PCB surface, accelerate the curing of the solder mask, and maintain the fluidity of the solder mask through the heating tube. It is suitable for operation in low temperature environments in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the printing assembly of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the printing assembly of the present invention; Figure 4 This is a schematic cross-sectional view of the detection mechanism of the present invention. Figure 1 ; Figure 5 This is a schematic cross-sectional view of the detection mechanism of the present invention. Figure 2 ; Figure 6 For the present invention Figure 5 A schematic diagram of the structure of part A in the middle; Figure 7 This is a schematic cross-sectional view of the detection mechanism of the present invention. Figure 3 ; Figure 8 This is a schematic cross-sectional view of the detection mechanism of the present invention. Figure 4 ; Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure of part B; Figure 10 This is a schematic diagram of the overall structure of the maintenance mechanism of the present invention; Figure 11 It is a schematic cross-sectional view of part of the structure of the maintenance mechanism of the present invention.

[0019] In the figure: 1. first bracket; 2. second bracket; 3. first motor; 4. guiding mechanism; 41. printing assembly; 411. annular plate; 412. sector plate; 413. positioning wheel; 414. first connecting rod; 415. second connecting rod; 416. mounting plate; 417. moving plate; 418. sleeve; 419. fixing rod; 4110. fixing plate; 4111. buffer rod; 4112. connecting plate; 4113. first spring; 4114. solder paste box; 42. detecting mechanism; 421. second motor; 422. mounting shaft; 423. rotating plate; 424. slide plate; 425. second spring; 426. arc pressure plate; 427. first spur gear; 428. first chain; 429. second spur gear; 4210. opposing threaded rod; 4211. moving block ; 4212, CCD camera; 4213, third motor; 4214, connecting shaft; 4215, third spur gear; 4216, second chain; 4217, fourth spur gear; 4218, first stirring rod; 4219, antistatic liquid tank; 4220, L-shaped connecting rod; 4221, cleaning rod; 4222, fifth spur gear; 4223, solenoid valve atomizing spray head; 4224, electric telescopic rod; 4225, sixth spur gear; 5, maintenance mechanism; 51, first hydraulic rod; 52, hydraulic pipe; 53, second hydraulic rod; 54, third bracket; 55, first bevel gear; 56, fourth motor; 57, second bevel gear; 58, exhaust pipe; 59, second stirring rod; 510, solder resist tank; 511, second solenoid valve spray head; 512, triangular push block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] The following electrical components are all electrically connected through the external PLC controller.

[0022] See also Figures 1-11 A printing device with a guiding and conveying mechanism includes a first bracket 1, a PCB board is mounted on the upper end of the first bracket 1 through a vacuum suction cup, two sets of symmetrical V-shaped board separation grooves are opened at the upper and lower ends of the PCB board, the upper end of the first bracket 1 is rotatably connected to the second bracket 2 through a rotating shaft, a first motor 3 is installed on the upper end of the second bracket 2, a guide mechanism 4 for guiding and conveying the printed PCB board is provided near the front end of the upper end of the second bracket 2, and a maintenance mechanism 5 for PCB board edge processing and solder mask filling is installed near the middle of the upper end of the second bracket 2.

[0023] In this embodiment, the guiding mechanism 4 includes a printing assembly 41 for printing solder paste on the PCB board, and the guiding mechanism 4 also includes a detection mechanism 42 for detecting and cleaning the steel mesh.

[0024] Specifically, the guiding mechanism 4 realizes the full-process quality control of PCB board solder paste printing through the collaboration of the printing component 41 and the detection mechanism 42. The printing component 41 is responsible for the precise coating of the solder paste and the work station switching. The detection mechanism 42 realizes the steel mesh status detection, cleaning and solder paste uniformization processing to ensure printing accuracy and steel mesh cleanliness.

[0025] In this embodiment, the printing assembly 41 includes an annular plate 411 fixedly connected to the output shaft of the first motor 3, a fan-shaped plate 412 is fixedly connected to the outer side of the annular plate 411, and the outer sides of the annular plate 411 and the fan-shaped plate 412 are rotatably connected to a positioning wheel 413. The lower end of the positioning wheel 413 is fixedly connected to the first bracket 1 through a bracket, and the other end of the annular plate 411 is fixedly connected to a first connecting rod 414. The front end of the first connecting rod 414 is rotatably connected to the second connecting rod 415 through a rotating shaft. The front end of the second connecting rod 415 is rotatably connected to the second connecting rod 415 through a rotating shaft. The shaft is rotatably connected to a mounting plate 416, the front end of the mounting plate 416 is fixedly connected to a movable plate 417, both sides of the movable plate 417 are fixedly connected to sleeves 418, the inner side of the sleeve 418 is slidably connected to a fixed rod 419, the front and rear ends of the fixed rod 419 are fixedly connected to a fixed plate 4110, the lower end of the fixed plate 4110 is fixedly connected to the second bracket 2, the lower end of the mounting plate 416 is fixedly connected to a solder paste box 4114, the solder paste box 4114 is T-shaped, and solder paste is stored inside the solder paste box 4114.

[0026] Specifically, the rotational motion of the driving annular plate 411 and the fan-shaped plate 412 of the first motor 3 is converted into the reciprocating motion of the mounting plate 416 to control the printing stroke. The positioning wheel 413 serves as a rotating fulcrum to ensure that the motion trajectory of the annular plate 411 and the fan-shaped plate 412 is stable. The first connecting rod 414 and the second connecting rod 415 transmit power and adjust the moving direction of the mounting plate 416 to achieve precise positioning of the solder paste box 4114. The sleeve 418 and the fixed rod 419 limit the motion range of the movable plate 417 to ensure the parallelism of the printing plane. The T-shaped design of the solder paste box 4114 enhances the structural rigidity and stores and evenly releases the solder paste.

[0027] In this embodiment, the front end of the mounting plate 416 is fixedly connected to two groups of symmetrical buffer rods 4111, and the outer sides of the two groups of buffer rods 4111 are slidably connected to a connecting plate 4112. The rear end of the connecting plate 4112 is fixedly connected to the mounting plate 416, and a first spring 4113 is provided on the outer side of the buffer rod 4111. One end of the first spring 4113 is fixedly connected to the connecting plate 4112, and the other end of the first spring 4113 is fixedly connected to the mounting plate 416.

[0028] Specifically, the buffer rod 4111 absorbs the vertical impact when the mounting plate 416 is lifted to prevent the solder paste box 4114 from changing position suddenly. The first spring 4113 provides elastic damping to reduce the vibration amplitude of the equipment. The connecting plate 4112 ensures the position of the buffer rod 4111 and the first spring 4113.

[0029] In this embodiment, the detection mechanism 42 includes a second motor 421 installed on one side of the solder paste box 4114, and the output shaft of the second motor 421 is fixedly connected to the mounting shaft 422, and the mounting shaft 422 is rotatably connected to the inner side of the solder paste box 4114, and the outer side of the mounting shaft 422 is fixedly connected to four groups of rotating plates 423, and the outer side of the rotating plate 423 is slidingly connected to a slide plate 424, and the other end of the slide plate 424 is fixedly connected to an arc-shaped pressure plate 426, and multiple groups of second springs 425 are provided on the inner side of the slide plate 424, one end of the second spring 425 is fixedly connected to the slide plate 424, and the other end of the second spring 425 is fixedly connected to the rotating plate 423.

[0030] Specifically, the output shaft of the second motor 421 drives the mounting shaft 422, and the mounting shaft 422 drives the rotating plate 423 to rotate. Through the cooperation of the slide plate 424 and the second spring 425, the arc pressure plate 426 periodically scrapes off the solder paste and blocks the flow, avoiding waste while ensuring uniform coating.

[0031] In this embodiment, the other end of the mounting shaft 422 is fixedly connected to a first spur gear 427, the outer side of the first spur gear 427 is rotatably connected to a first chain 428, the inner side of the first chain 428 is rotatably connected to a second spur gear 429, one end of the second spur gear 429 is fixedly connected to a counter-threaded rod 4210, both ends of the counter-threaded rod 4210 are rotatably connected to the solder paste box 4114, the outer side of the solder paste box 4114 is respectively threadedly connected to two groups of moving blocks 4211 through counter-threads, the front end of the moving block 4211 is in contact with the solder paste box 4114, the lower end of the moving block 4211 is provided with a roller, and the rear end of the moving block 4211 is fixedly connected to a CCD camera 4212. A ring light bar is provided at the lower end of the CCD camera 4212, and a third motor 4213 is installed at the upper end of the CCD camera 4212. The output shaft of the third motor 4213 is fixedly connected to the connecting shaft 4214, and the upper end of the connecting shaft 4214 is fixedly connected to the third spur gear 4215. The outer side of the third spur gear 4215 is rotatably connected to the second chain 4216, and the inner side of the second chain 4216 is rotatably connected to the fourth spur gear 4217. The lower end of the fourth spur gear 4217 is rotatably connected to the first stirring rod 4218, and the outer side of the first stirring rod 4218 is rotatably connected to the antistatic liquid tank 4219. The lower end of the antistatic liquid tank 4219 is fixedly connected to the moving block 4211.

[0032] Specifically, the rotating shaft 422 is installed to drive the first spur gear 427 to rotate, the first spur gear 427 drives the second spur gear 429 to rotate through the first chain 428, the second spur gear 429 drives two groups of moving blocks 4211 to move along through the opposing threaded rod 4210, the moving block 4211 drives the CCD camera 4212 to detect organic matter in the micropores of the steel mesh before printing, the output shaft of the third motor 4213 drives the connecting shaft 4214 to rotate, the connecting shaft 4214 drives the third spur gear 4215 to rotate, the third spur gear 4215 drives the fourth spur gear 4217 to rotate through the second chain 4216, and the fourth spur gear 4217 drives the first stirring rod 4218 to stir in the antistatic liquid tank 4219 to avoid internal deposition.

[0033] In this embodiment, an L-shaped connecting rod 4220 is fixedly connected to the outer side of the connecting shaft 4214 , a cleaning rod 4221 is fixedly connected to the lower end of the L-shaped connecting rod 4220 , and the inner side of the cleaning rod 4221 is slidably connected to the light bar of the CCD camera 4212 .

[0034] Specifically, the cleaning rod 4221 slides back and forth with the L-shaped connecting rod 4220, wiping the annular light bar of the CCD camera 4212 through the microfiber material to remove dust and solder paste splash residue, ensure the clarity of the detection image, and avoid misjudgment of defects due to optical contamination.

[0035] In this embodiment, the lower end of the cleaning rod 4221 is rotatably connected to the fifth spur gear 4222 through a rotating shaft, and the lower end of the fifth spur gear 4222 is installed with an electromagnetic valve atomizing spray head 4223. The input port of the electromagnetic valve atomizing spray head 4223 is fixedly connected to the antistatic liquid tank 4219 through a pipe, and the lower end of the electromagnetic valve atomizing spray head 4223 is installed with multiple groups of electric telescopic rods 4224. The output shaft of the electric telescopic rod 4224 is fixedly connected with a soft brush, and the soft brush passes through the steel mesh. The outer side of the fifth spur gear 4222 is meshed with the sixth spur gear 4225, and the inner side of the sixth spur gear 4225 is fixedly connected to the outer side of the CCD camera 4212.

[0036] Specifically, the electric telescopic rod 4224 drives the soft brush to penetrate into the micropores of the steel mesh, and cooperates with the anti-static cleaning liquid sprayed by the solenoid valve atomizing spray head 4223. The dual effects of mechanical friction and chemical cleaning remove organic residues. At the same time, the anti-static treatment reduces dust adsorption and clogging of holes. The fifth spur gear 4222 and the sixth spur gear 4225 make the cleaning rod 4221 rotate while revolving, driving the soft brush to penetrate into the micropores of the steel mesh, thereby achieving deep cleaning of blocked holes.

[0037] In this embodiment, the maintenance mechanism 5 includes two groups of symmetrical first oil hydraulic rods 51, the front ends of the two groups of first oil hydraulic rods 51 are fixedly connected to the solder paste box 4114, the outer sides of the two groups of first oil hydraulic rods 51 are slidably connected with oil hydraulic tubes 52, the rear ends of the first oil hydraulic rods 51 are fixedly connected with sealing rings, the oil hydraulic tubes 52 are fixedly connected to the inner side of the first bracket 1, and the inner side of the oil hydraulic tubes 52 are fixedly connected with two groups of symmetrical limit strips, the other end of the oil hydraulic tubes 52 is slidably connected with the second oil hydraulic rod 53, the rear end of the second oil hydraulic rod 53 is fixedly connected with a sealing ring, and the front end of the second oil hydraulic rod 53 is fixedly connected to the third bracket 54.

[0038] Specifically, when the solder paste box 4114 moves, it pushes the first hydraulic rod 51 and the second hydraulic rod 53, and the second hydraulic rod 53 drives the third bracket 54 to move synchronously along the edge of the PCB board, ensuring the time and space synchronization of the polishing, gluing and printing processes.

[0039] In this embodiment, the inner side of the third bracket 54 is rotatably connected to two groups of symmetrical first bevel gears 55. The outer sides of the two groups of first bevel gears 55 are provided with friction plates. The outer sides of the two groups of first bevel gears 55 are commonly meshed and connected with the second bevel gear 57. The second bevel gear 57 is rotatably connected to the inner side of the third bracket 54. The other end of the second bevel gear 57 is fixedly connected to the exhaust pipe 58. The inner wall of the exhaust pipe 58 is provided with a guide groove. The lower end of the third bracket 54 is installed with a fourth motor 56. The output shaft of the fourth motor 56 is fixedly connected to one group of first bevel gears 55 in the two groups of first bevel gears 55. The upper end of the other group of first bevel gears 55 in the two groups of first bevel gears 55 is fixedly connected to the upper end of the other group of first bevel gears 55. A second stirring rod 59 is fixedly connected, a heating tube is provided on the inner side of the second stirring rod 59, a solder resist tank 510 is rotatably connected to the outer side of the second stirring rod 59, the lower end of the solder resist tank 510 is fixedly connected to the third bracket 54, and two groups of symmetrical second solenoid valve spray heads 511 are installed on the inner side of the third bracket 54, the second solenoid valve spray heads 511 are fixedly connected to the solder resist tank 510 through pipes, the close ends of the two groups of second solenoid valve spray heads 511 are fixedly connected to the triangular push blocks 512, the output ports of the second solenoid valve spray heads 511 pass through the triangular push blocks 512, and the two groups of triangular push blocks 512 are slidably connected to the inner side of the V-shaped board dividing groove of the PCB board.

[0040] Specifically, the fourth motor 56 drives the two sets of counter-rotating first bevel gears 55 to rotate and grind the burrs on the edge of the PCB board through the friction plate. The upper first bevel gear 55 drives the second stirring rod 59 to prevent the solder resist glue from solidifying. The second solenoid valve spray head 511 fills the solder resist glue. The triangular push block 512 scrapes the solder resist glue in the V-shaped board dividing groove to prevent the solder joint from breaking. The exhaust pipe 58 discharges a rotating airflow to remove particulate matter on the surface of the PCB and uses the airflow to cool the solder resist glue.

[0041] Working principle: when in use, place the PCB board horizontally on the upper end of the first bracket 1, start the vacuum suction cup to adsorb and fix it to ensure the flatness of the board surface, start the first motor 3, drive the annular plate 411 to rotate clockwise around the positioning wheel 413, and the positioning wheel 413 is rigidly connected to the first bracket 1 through the bracket to form a stable rotation fulcrum, the annular plate 411 drives the first connecting rod 414 to rotate, and the first connecting rod 414 pulls the mounting plate 416 through the second connecting rod 415 according to the change of the rotation angle, and the mounting plate 416 passes through the moving plate 417, and the moving plate 417 slides along the fixed rod 419 through the sleeve 418. The fixed plates 4110 at both ends of the fixed rod 419 limit the movement trajectory to ensure that the solder paste box 4114 remains parallel to the steel mesh plane. When the annular plate 411 contacts the positioning wheel 413, the mounting plate 416 drives the solder paste box 4114 to move at a uniform speed along the steel mesh. After the annular plate 411 rotates to the set range, the solder paste box 4114 moves to After the printing is completed at the rear end, the annular plate 411 is separated from the positioning wheel 413, and the straight edge of the fan plate 412 guides the positioning wheel 413 to slide. The first connecting rod 414 is affected by the change in the length of the straight edge of the fan plate 412, so that the first connecting rod 414 lifts the second bracket 2 through the rotation of the fan plate 412. At this time, the printed PCB board is taken out, and the mounting plate 416 is offset due to the lifting of the second bracket 2. The buffer rod 4111 slides in the connecting plate 4112 and presses the first spring 4113. The first spring 4113 is used to slow down the vertical gravity of the mounting plate 416. Then the positioning wheel 413 continues to rotate along the arc edge of the fan plate 412, so that the first connecting rod 414 pushes the mounting plate 416 forward again to reset. The positioning wheel 413 rotates along the straight edge of the fan plate 412 again, so that the second bracket 2 falls and resets. At this time, the positioning wheel 413 contacts the annular plate 411 again to complete the reset of the printing assembly 41, and prepare for the next cycle. Before printing, the solder paste box 4114 starts the second motor 421, and its output shaft drives the installation shaft 422 to rotate, and the installation shaft 422 drives the first spur gear 427 to rotate, and the first spur gear 427 drives the second spur gear 429 to rotate through the first chain 428, and the second spur gear 429 drives two sets of moving blocks 4211 to move along through the opposite threaded rod 4210, and the moving block 4211 drives the CCD camera 4212 to detect organic matter in the micropores of the steel mesh before printing, and compares the steel mesh opening and the PCB pad position through the computer image processing system to ensure that the solder paste printed on the PCB board is aligned with the steel mesh. If the deviation is greater than ±0.1mm, the first motor 3 is triggered to fine-tune the phase angle of the annular plate 411 to achieve dynamic correction, and the third motor 4213 is started. Its output shaft drives the connecting shaft 4214 to rotate, and the connecting shaft 4214 drives the third spur gear 4215 to rotate, and the third spur gear 4 215 drives fourth spur gear 4217 to rotate via second chain 4216. Fourth spur gear 4217 drives first stirring rod 4218 to stir in antistatic liquid tank 4219 to prevent internal deposition. Connecting shaft 4214 drives L-shaped connecting rod 4220 to rotate. L-shaped connecting rod 4220 drives cleaning rod 4221 to slide back and forth along the light bar of CCD camera 4212 to clean and remove dust. Cleaning rod 4221 drives fifth spur gear 4222 to move. When fifth spur gear 4222 revolves, it rotates via sixth spur gear 4225. Solenoid valve atomizing spray head 4223 is activated to spray the soft brush at the output shaft of electric telescopic rod 4224. Electric telescopic rod 4224 is activated to clean the clogged areas of the stencil, remove organic matter in the micropores, enhance surface activity, and prevent dust adsorption and pore blockage through antistatic treatment, thereby improving the stencil printing effect of solder paste box 4114. When the mounting shaft 422 rotates, the slide plate 424 is driven to rotate. The slide plate 424 drives the arc-shaped pressure plate 426 to scrape the solder paste downward. When the arc-shaped pressure plate 426 contacts the inner wall of the solder paste box 4114, the slide plate 424 and the rotating plate 423 jointly compress the second spring 425, and the arc-shaped pressure plate 426 blocks the flow of solder paste, thereby preventing excessive solder paste from falling and causing waste. After the arc-shaped pressure plate 426 separates from the inner wall, the second spring 425 releases its elastic force, pushing the slide plate 424 back to its original position, and the solder paste is evenly coated on the surface of the steel mesh. When the solder paste box 4114 is performing mobile printing, the first hydraulic rod 51 is pushed to slide into the hydraulic tube 52, and the hydraulic oil drives the second hydraulic rod 53 to extend, driving the third bracket 54 to move along the edge of the PCB, and starting the fourth motor 56. Its output shaft drives the first bevel gear 55 to rotate, and the first bevel gear 55 drives the second bevel gear 57 to rotate, and the second bevel gear 57 drives another set of first bevel gears 55 to rotate. The two sets of first bevel gears 55 grind and clean the edge of the PCB to avoid residual burrs. The upper set of first bevel gears 5 The second stirring rod 59 is driven to stir the solder resist glue tank 510 to prevent it from cooling and solidifying. The second solenoid valve spray head 511 is activated to apply the glue in the solder resist glue tank 510 to the V-shaped board separation groove of the PCB through the pipeline. The solder resist glue is evenly applied and the glue surface is smoothed by the triangular push block 512 to prevent solder paste from seeping into the groove and causing solder joint breakage during board separation. The exhaust pipe 58 rotates with the second bevel gear 57, and the guide groove generates a centrifugal airflow with a certain flow rate to remove particulate matter on the PCB surface and accelerate the solidification of the solder resist glue.

[0042] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A printing device with a guide conveying mechanism, comprising a first bracket (1), characterized in that: The upper end of the first bracket (1) is rotatably connected to the second bracket (2) via a rotating shaft, the upper end of the second bracket (2) is mounted with a first motor (3), the upper end of the second bracket (2) is provided with a guide mechanism (4) for guiding and transporting a printed PCB board near the front end, and the upper end of the second bracket (2) is provided with a maintenance mechanism (5) for edge processing of the PCB board and solder resist filling near the middle.

2. A printing device with a guide conveying mechanism according to claim 1, characterized in that: The guiding mechanism (4) comprises a printing assembly (41) for printing solder paste on a PCB board, and the guiding mechanism (4) further comprises a detection mechanism (42) for detecting and cleaning the steel mesh.

3. A printing device with a guide conveying mechanism according to claim 2, characterized in that: The printing assembly (41) includes an annular plate (411) fixedly connected to the output shaft of the first motor (3), a sector plate (412) fixedly connected to the outer side of the annular plate (411), and a positioning wheel (413) rotatably connected to the outer sides of the annular plate (411) and the sector plate (412), the lower end of the positioning wheel (413) is fixedly connected to the first bracket (1) through a bracket, and the other end of the annular plate (411) is fixedly connected to a first connecting rod (414), the front end of the first connecting rod (414) is rotatably connected to a second connecting rod (415) through a rotating shaft, and the front end of the second connecting rod (415) is rotatably connected to the second connecting rod (415) through a rotating shaft. A mounting plate (416) is connected, the front end of the mounting plate (416) is fixedly connected to a movable plate (417), both sides of the movable plate (417) are fixedly connected to sleeves (418), the inner side of the sleeve (418) is slidably connected to a fixed rod (419), the front and rear ends of the fixed rod (419) are fixedly connected to a fixed plate (4110), the lower end of the fixed plate (4110) is fixedly connected to the second bracket (2), and the lower end of the mounting plate (416) is fixedly connected to a solder paste box (4114), the solder paste box (4114) is T-shaped, and solder paste is stored inside the solder paste box (4114).

4. A printing device with a guide conveying mechanism according to claim 3, characterized in that: The front end of the mounting plate (416) is fixedly connected to two groups of symmetrical buffer rods (4111), and the outer sides of the two groups of buffer rods (4111) are slidably connected to a connecting plate (4112). The rear end of the connecting plate (4112) is fixedly connected to the mounting plate (416). A first spring (4113) is provided on the outer side of the buffer rod (4111), one end of the first spring (4113) is fixedly connected to the connecting plate (4112), and the other end of the first spring (4113) is fixedly connected to the mounting plate (416).

5. The printing device with a guide conveying mechanism according to claim 2, characterized in that: The detection mechanism (42) includes a second motor (421) installed on one side of the solder paste box (4114), the output shaft of the second motor (421) is fixedly connected to a mounting shaft (422), the mounting shaft (422) is rotatably connected to the inner side of the solder paste box (4114), the outer side of the mounting shaft (422) is fixedly connected to four groups of rotating plates (423), the outer side of the rotating plate (423) is slidably connected to a slide plate (424), the other end of the slide plate (424) is fixedly connected to an arc-shaped pressure plate (426), and a plurality of groups of second springs (425) are provided on the inner side of the slide plate (424), one end of the second spring (425) is fixedly connected to the slide plate (424), and the other end of the second spring (425) is fixedly connected to the rotating plate (423).

6. The printing device with a guide conveying mechanism according to claim 5, characterized in that: The other end of the mounting shaft (422) is fixedly connected to a first spur gear (427), the outer side of the first spur gear (427) is rotatably connected to a first chain (428), the inner side of the first chain (428) is rotatably connected to a second spur gear (429), one end of the second spur gear (429) is fixedly connected to a counter-threaded rod (4210), both ends of the counter-threaded rod (4210) are rotatably connected to a solder paste box (4114), the outer side of the solder paste box (4114) is respectively threadedly connected to two groups of moving blocks (4211) via counter-threads, the front end of the moving block (4211) is in contact with the solder paste box (4114), the lower end of the moving block (4211) is provided with a roller, the rear end of the moving block (4211) is fixedly connected to a CCD camera (4212), the CCD A ring light bar is provided at the lower end of the CD camera (4212), and a third motor (4213) is installed at the upper end of the CCD camera (4212). The output shaft of the third motor (4213) is fixedly connected to a connecting shaft (4214), and the upper end of the connecting shaft (4214) is fixedly connected to a third spur gear (4215). The outer side of the third spur gear (4215) is rotatably connected to a second chain (4216), and the inner side of the second chain (4216) is rotatably connected to a fourth spur gear (4217). The lower end of the fourth spur gear (4217) is rotatably connected to a first stirring rod (4218), and the outer side of the first stirring rod (4218) is rotatably connected to an antistatic liquid tank (4219). The lower end of the antistatic liquid tank (4219) is fixedly connected to the moving block (4211).

7. The printing device with a guide conveying mechanism according to claim 6, characterized in that: The outer side of the connecting shaft (4214) is fixedly connected to an L-shaped connecting rod (4220), the lower end of the L-shaped connecting rod (4220) is fixedly connected to a cleaning rod (4221), and the inner side of the cleaning rod (4221) is slidably connected to the light bar of the CCD camera (4212).

8. The printing device with a guide conveying mechanism according to claim 7, characterized in that: The lower end of the cleaning rod (4221) is rotatably connected to a fifth spur gear (4222) via a rotating shaft, and an electromagnetic valve atomizing spray head (4223) is installed at the lower end of the fifth spur gear (4222). The input port of the electromagnetic valve atomizing spray head (4223) is fixedly connected to the antistatic liquid tank (4219) via a pipeline. The lower end of the electromagnetic valve atomizing spray head (4223) is installed with multiple groups of electric telescopic rods (4224), and the output shafts of the electric telescopic rods (4224) are fixedly connected to soft brushes, which pass through the steel mesh. The outer side of the fifth spur gear (4222) is meshedly connected to the sixth spur gear (4225), and the inner side of the sixth spur gear (4225) is fixedly connected to the outer side of the CCD camera (4212).

9. The printing device with a guide conveying mechanism according to claim 1, characterized in that: The maintenance mechanism (5) includes two groups of symmetrical first oil pressure rods (51), the front ends of the two groups of the first oil pressure rods (51) are fixedly connected to the solder paste box (4114), the outer sides of the two groups of the first oil pressure rods (51) are slidably connected to oil pressure tubes (52), the rear ends of the first oil pressure rods (51) are fixedly connected to sealing rings, the oil pressure tubes (52) are fixedly connected to the inner side of the first bracket (1), the inner side of the oil pressure tubes (52) are fixedly connected to two groups of symmetrical limit strips, the other end of the oil pressure tubes (52) is slidably connected to a second oil pressure rod (53), the rear end of the second oil pressure rod (53) is fixedly connected to a sealing ring, and the front end of the second oil pressure rod (53) is fixedly connected to a third bracket (54).

10. The printing device with a guide and conveying mechanism according to claim 9, characterized in that: The inner side of the third bracket (54) is rotatably connected to two groups of symmetrical first bevel gears (55), and the outer sides of the two groups of first bevel gears (55) are provided with friction plates. The outer sides of the two groups of first bevel gears (55) are commonly meshed and connected to a second bevel gear (57). The second bevel gear (57) is rotatably connected to the inner side of the third bracket (54). The other end of the second bevel gear (57) is fixedly connected to an exhaust pipe (58). The inner wall of the exhaust pipe (58) is provided with a guide groove. The lower end of the third bracket (54) is installed with a fourth motor (56). The output shaft of the fourth motor (56) is fixedly connected to one group of first bevel gears (55) in the two groups of first bevel gears (55). The upper end of the other group of first bevel gears (55) in the two groups of first bevel gears (55) is fixedly connected to the exhaust pipe (58). A second stirring rod (59) is fixedly connected, a heating tube is provided on the inner side of the second stirring rod (59), a solder resist glue tank (510) is rotatably connected on the outer side of the second stirring rod (59), the lower end of the solder resist glue tank (510) is fixedly connected to the third bracket (54), two groups of symmetrical second solenoid valve spray heads (511) are installed on the inner side of the third bracket (54), the second solenoid valve spray heads (511) are fixedly connected to the solder resist glue tank (510) through pipes, the two groups of second solenoid valve spray heads (511) are fixedly connected to the adjacent ends thereof with triangular push blocks (512), the output ports of the second solenoid valve spray heads (511) pass through the triangular push blocks (512), and the two groups of triangular push blocks (512) are slidably connected to the inner side of the V-shaped board separation groove of the PCB board.

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