CN213227978U - Screen printing machine for circuit board - Google Patents

Abstract

The application relates to a silk screen printing machine for circuit board, including frame, silk screen printing mechanism, be provided with conveyor in the frame, conveyor includes the conveyer belt, places board, reference column, elevating gear, and the conveyer belt setting just is used for carrying the circuit board in the frame, places the board setting and just comes to support the circuit board in the frame, and the reference column slides and sets up in the frame and be used for fixing a position the circuit board, and elevating gear sets up in the frame. This application starts through the conveyer belt and drives the circuit board and move forward, and elevating gear starts to drive the reference column and shifts up, and consequently the circuit board moves and fixes a position the circuit board when placing on the board the reference column, then silk screen printing mechanism starts to print the soldering paste on the circuit board, then elevating gear starts to drive the reference column and moves down, and the circuit board moves forward under the effect of conveyer belt, consequently at the circuit board, has saved the time, has improved the lower problem of silk screen printing machine production efficiency.

Description

Screen printing machine for circuit board

Technical Field

The application relates to the technical field of screen printing machines, especially, relate to a screen printing machine for circuit board.

Background

The screen printer is called a screen printer, and is a device for printing soldering paste or surface mount adhesive on a PCB pad through a screen. The method is mainly applied to the electronic processing industry, the silk-screen mark of a printed circuit board, the mark of an instrument shell panel, the solder paste printing in the circuit board processing process and the like.

In the related art, reference may be made to chinese utility model patent with an authorization publication number of CN205736350U, which discloses a screen printing machine for screen printing glue applied to a flexible circuit board, comprising a workbench, wherein a horizontal screen is arranged on the workbench, and a scraper and an oil adjusting knife are arranged on the horizontal screen; this anchor clamps simple structure, the operator is easy to operate, can very conveniently utilize present material and machine in this factory can process, and cooperation horizontal half tone is on the silk screen printing machine to the flexible circuit board to the glue silk screen printing, directly pastes the steel sheet to the flexible circuit board in the silk screen printing has the region of glue after the static natural curing of self-drying type colloid, has replaced ya keli glued membrane or epoxy glued membrane with the glue, has reduced material cost, has improved efficiency. During actual work, the horizontal screen printing plate is arranged on the workbench, the scraper scrapes and prints on the horizontal screen printing plate according to a certain direction and path, the oil adjusting knife enables printing ink to be more uniform, and the screen printing plate is placed on the multi-layer frame after silk printing.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: but generally mass production is in the actual course of working, and consequently the quantity of processing is great, but all is manual operation when installing the circuit board on anchor clamps, therefore the mounting panel material loading process can take more time, consequently the production efficiency of silk screen printing machine is lower.

SUMMERY OF THE UTILITY MODEL

In order to improve the lower problem of silk screen printing machine production efficiency, this application provides a silk screen printing machine for circuit board.

The application provides a silk screen printing machine for circuit board adopts following technical scheme:

the utility model provides a silk screen printing machine for circuit board, includes the frame, be provided with silk screen printing mechanism in the frame, be provided with the conveyor who carries the circuit board in the frame, conveyor includes the conveyer belt, places board, reference column, elevating gear, the conveyer belt sets up in the frame and is used for carrying the circuit board, place the board setting in the frame and come to support the circuit board, the reference column slides and sets up in the frame and be used for fixing a position the circuit board, elevating gear sets up in the frame and is connected with the reference column.

Through adopting above-mentioned technical scheme, the conveyer belt starts to drive the circuit board and moves forward, and elevating gear starts to drive the reference column and shifts up, consequently the circuit board moves and contradicts with the reference column when placing on the board, and the reference column comes to fix a position the circuit board, then silk screen printing mechanism starts to be printed the soldering paste on the circuit board, then elevating gear starts to drive the reference column and moves down, and the circuit board moves forward under the effect of conveyer belt, consequently at the circuit board, has saved the time, has improved the lower problem of silk screen printing machine production efficiency.

Preferably, elevating gear includes spliced pole, lift cylinder, the vertical setting that slides of spliced pole is in the frame and is connected with the reference column, the lift cylinder sets up in the frame and is connected with the spliced pole.

Through adopting above-mentioned technical scheme, the lift cylinder starts to drive the spliced pole and removes, and the spliced pole removes and drives reference column vertical removal to this drives the lift cylinder and starts to drive reference column vertical removal.

Preferably, reference column and elevating gear all are provided with two along circuit board traffic direction equipartition, and two the reference column is contradicted respectively on the both sides wall that the circuit board is relative.

The silk-screen printing mechanism can produce the effort to the circuit board when printing to the circuit board, therefore a reference column fixes a position the circuit board, therefore the circuit board probably takes place to remove to reduce the accuracy in position after the circuit board printing, reduced the quality after the circuit board printing.

Through adopting above-mentioned technical scheme, the circuit board with one of them reference column contact back, another elevating gear starts to drive the reference column and shifts up, consequently two reference columns contradict on the relative both sides wall of circuit board to this comes to carry on spacingly to the circuit board, has reduced the probability that the circuit board takes place to remove, has improved the quality after the circuit board printing.

Preferably, the rack is provided with a moving seat in a sliding manner along the running direction of the circuit board, one of the positioning columns and the lifting device are arranged on the moving seat, and the rack is provided with a moving mechanism connected with the moving seat.

After the size of the circuit board is changed, the positions of the two positioning columns also need to be changed, so that the positioning columns can limit the circuit boards with different sizes;

through adopting above-mentioned technical scheme, moving mechanism starts to drive and removes the seat and remove, removes the seat and removes and drive reference column and elevating gear removal to this realizes that the reference column carries on spacingly to the circuit board of unidimensional not.

Preferably, the moving mechanism comprises a moving track, a connecting plate and a moving device, the moving track is arranged on the rack, the moving seat is arranged on the moving track in a sliding mode, the connecting plate is arranged on the moving seat, and the moving device is arranged on the rack and connected with the connecting plate.

By adopting the technical scheme, the mobile device is started to drive the connecting plate to move, and the connecting plate moves to drive the mobile seat to move on the mobile track, so that the mobile device is started to drive the mobile seat to move.

Preferably, the mobile device includes synchronizing wheel, hold-in range, moving motor, the synchronizing wheel rotates to set up in the frame and horizontal equipartition is provided with two, the hold-in range cover is established on two synchronizing wheels and is connected with the connecting plate, moving motor sets up in the frame and is connected with one of them synchronizing wheel.

Through adopting above-mentioned technical scheme, the removal motor starts to drive the synchronizing wheel and rotates, and the synchronizing wheel rotates and drives the hold-in range removal, and the hold-in range removal drives the connecting plate and removes the seat and remove to this realizes that the removal motor starts to drive and removes the seat and remove.

Preferably, the placing plate is arranged on the rack in a sliding manner, and a lifting device connected with the placing plate is arranged on the rack.

In the process that the circuit board moves from the conveying belt to the placing plate and then contacts with the positioning column, the circuit board and the placing plate can be in contact for a period of time, so that relative friction is generated between the placing plate and the circuit board, and certain damage is generated to the circuit board; meanwhile, in the process of printing the circuit board, the conveying belt and the cable board can generate friction in the moving process of the conveying belt, and under the action of the conveying belt, the circuit board and the positioning column can generate extrusion force which can easily damage the circuit board, so that the quality of the circuit board is reduced;

through adopting above-mentioned technical scheme, the lifting device starts to drive and places the board and move down, consequently the circuit board can not produce relative friction with placing the board when moving to placing on the board, and the circuit board contacts the back with the reference column, the lifting device starts to drive and places the board and shift up, consequently place the board and drive the circuit board and shift up and keep away from the conveyer belt to reduced the frictional force between conveyer belt and the cable board, also reduced the extrusion force between cable board and the reference column, reduced the probability that the circuit board received the damage, improved the quality of circuit board.

Preferably, the lifting device comprises a lifting cylinder and a lifting disc, the lifting cylinder is arranged on the frame, a piston rod of the lifting cylinder is vertically upward, and the lifting disc is arranged on the piston rod of the lifting cylinder and supported on the lower surface of the placing plate.

Through adopting above-mentioned technical scheme, the lifting cylinder starts to drive the lifting dish and removes, and the lifting dish removes to drive and places board vertical removal to this realizes that the lifting cylinder starts to drive and places board vertical removal.

Preferably, the rack is provided with a limiting buffer assembly connected with the placing plate, the limiting buffer assembly comprises a sliding rod, an upper buffer and a lower buffer, the sliding rod is arranged on the lower surface of the placing plate and is arranged on the rack in a sliding manner, and the upper buffer and the lower buffer are arranged on the rack and are used for buffering when the placing plate ascends to a specified position and descends to the specified position.

The lifting cylinder is started to drive the placing plate to move upwards, so that the lifting cylinder is high in ascending speed, and after the lifting cylinder moves upwards or downwards to a designated position, the circuit board is easy to vibrate on the placing plate, so that the circuit board is easy to damage due to vibration, and the quality of the circuit board is reduced;

by adopting the technical scheme, when the placing plate moves, the sliding rod moves on the rack, so that the probability of deviation when the placing plate vertically moves is reduced; the upper buffer and the lower buffer when the placing plate ascends or moves downwards to a specified position, so that the probability of vibration of the circuit board on the placing plate is reduced, the probability of damage of the circuit board is reduced, and the quality of the circuit board is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the circuit board is driven to move forwards by the starting of the conveying belt, the lifting device is started to drive the positioning columns to move upwards, so that the positioning columns position the circuit board when the circuit board moves onto the placing plate, then the silk-screen printing mechanism is started to print soldering paste on the circuit board, then the lifting device is started to drive the positioning columns to move downwards, and the circuit board moves forwards under the action of the conveying belt, so that the time is saved for the circuit board, and the problem of low production efficiency of a silk-screen printing machine is solved;

2. after the circuit board is contacted with one positioning column, the other lifting device is started to drive the positioning column to move upwards, so that the two positioning columns are abutted against two opposite side walls of the circuit board to limit the circuit board, the probability of movement of the circuit board is reduced, and the quality of the printed circuit board is improved; the positioning column and the lifting device are driven to move by starting the moving motor, so that the positioning column can limit circuit boards with different sizes;

3. the sliding rod moves on the rack, so that the probability of deviation when the placing plate moves vertically is reduced; the upper buffer and the lower buffer when the placing plate ascends or moves downwards to a specified position, so that the probability of vibration of the circuit board on the placing plate is reduced, the probability of damage of the circuit board is reduced, and the quality of the circuit board is improved.

Drawings

FIG. 1 is a schematic perspective view of the present application;

FIG. 2 is a schematic view of the micro-motion device of the present application;

FIG. 3 is a schematic view of the conveyor and drive arrangement of the present application;

FIG. 4 is a partial schematic structural view of the present application, showing primarily the lifting device and the moving mechanism;

FIG. 5 is a schematic view of the structure of the driving device of the present application;

FIG. 6 is a schematic view of the structure on the mounting plate of the present application;

figure 7 is a schematic view of the construction of the lifting device of the present application;

FIG. 8 is a schematic view of the construction of the lift and translation mechanism of the present application;

FIG. 9 is a schematic structural view of a screen printing mechanism of the present application;

FIG. 10 is a schematic structural view of the screen printing mechanism of the present application, with the glide nest omitted;

fig. 11 is a schematic view of the construction of a second drive assembly and a coupling device according to the present application.

Reference numerals: 1. a machine platform; 11. a support table; 12. a support frame; 13. a first guide rail; 14. a support plate; 15. a second guide rail; 16. a fixed seat; 2. a frame; 21. a conveying guide rail; 22. mounting a plate; 221. tensioning the hole; 222. a sliding groove; 223. a sliding frame; 23. a fixed block; 24. a drive device; 25. a drive screw; 251. a driven wheel; 26. rotating the motor; 261. a driving wheel; 262. a drive belt; 27. a mounting seat; 271. a waist-shaped hole; 28. a pinch roller; 281. a compression screw; 282. a compression nut; 283. a protective cover; 3. a conveying device; 31. a conveyor belt; 311. a first guide wheel; 312. a second guide wheel; 313. a third guide wheel; 314. a main guide wheel; 315. a conveying motor; 316. a horizontal segment; 317. a vertical section; 32. placing the plate; 321. a strip-shaped hole; 322. positioning holes; 33. a positioning column; 331. positioning seats; 332. positioning a plate; 333. a clamping hole; 34. a lifting device; 35. connecting columns; 36. a lifting cylinder; 4. a screen printing mechanism; 41. a sliding seat; 42. a wire mesh; 421. installing a frame; 43. a sliding table; 44. a wiping assembly; 441. a scraper; 442. returning the ink knife; 443. a lifting plate; 444. a first wiping cylinder; 445. a second wiping cylinder; 45. a first drive assembly; 451. a first drive motor; 452. a drive disc; 4521. fixing the rod; 453. a connecting rod; 454. a crank; 46. a second drive assembly; 461. moving the screw; 462. a first bevel gear; 463. a second drive motor; 464. a second bevel gear; 5. a micro-motion device; 51. a micromotion block; 52. a micro-motion screw rod; 53. a micromotion motor; 54. a lifting device; 55. a lifting cylinder; 551. a supporting seat; 56. a lifting disc; 6. a tension assembly; 61. a tensioning sleeve; 611. tensioning the screw; 612. tensioning the nut; 62. a tension wheel; 63. a limiting buffer component; 64. a slide bar; 65. an upper buffer; 651. a first buffer plate; 652. a second buffer plate; 653. a buffer base; 66. a lower buffer; 661. a cushion nut; 67. a buffer cylinder; 68. a floating joint; 7. a moving mechanism; 71. a moving track; 711. a movable seat; 72. a connecting plate; 721. a clamping plate; 73. a mobile device; 74. a synchronizing wheel; 75. a synchronous belt; 76. a moving motor; 8. a fixing device; 81. fixing the guide rail; 82. fixing the screw rod; 83. positioning blocks; 84. a lifting assembly; 85. a lifting seat; 86. a lift cylinder; 9. a connecting device; 91. connecting blocks; 911. a clamping groove; 92. an elastic plate; 921. a clamping block; 922. an elastic groove; 93. connecting a screw rod; 94. and clamping the screw rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-11.

The embodiment of the application discloses silk screen printing machine for circuit board.

In the embodiment of the present application, the oil pressure buffer is ACA1412-1-1, and the floating joint 68 is F-M12X 125F.

Referring to fig. 1, the screen printing machine for mobile phone processing includes a machine table 1, a frame 2 is installed on the machine table 1, a conveying device 3 is arranged on the frame 2, a supporting table 11 is fixedly installed on the upper surface of the machine table 1, and a screen printing mechanism 4 is arranged on the supporting table 11 above the conveying device 3.

Referring to fig. 1 and 2, a supporting frame 12 is fixedly installed on a machine table 1, two first guide rails 13 parallel to each other are fixedly installed on the supporting frame 12, a supporting plate 14 is slidably installed on the two first guide rails 13, and the supporting plate 14 is located above the first guide rails 13; two second guide rails 15 that are parallel to each other are fixedly installed on the upper surface of the supporting plate 14, the rack 2 is located on the upper surface of the machine table 1 and is installed on the two second guide rails 15 in a sliding manner, and the sliding direction of the rack 2 is perpendicular to the sliding direction of the supporting plate 14.

The upper surfaces of the support frame 12 and the support plate 14 are respectively provided with a micro-motion device 5 connected with the frame 2 and the support plate 14, the lower surface is explained by taking the micro-motion device 5 connected with the support plate 14 as an example, the micro-motion device 5 comprises a micro-motion block 51, a micro-motion screw 52 and a micro-motion motor 53, and the micro-motion block 51 is fixedly arranged on the lower surface of the support plate 14; the two fixing seats 16 are fixedly arranged on the support frame 12, the micro-motion screw 52 is rotatably arranged on the side wall of one side opposite to the two fixing seats 16, the axis of the micro-motion screw 52 is parallel to the sliding direction of the support plate 14, the micro-motion block 51 is positioned between the two fixing seats 16, and the axes of the two micro-motion screws 52 connected with the support plate 14 and the frame 2 are mutually vertical; the micromotion motor 53 is fixedly arranged on the fixed seat 16 and is connected with the micromotion screw 52.

Referring to fig. 3 and 4, the conveying device 3 includes a conveying belt 31, a placing plate 32, a positioning column 33 and a lifting device 34, two mutually parallel conveying guide rails 21 are fixedly installed on the upper surface of the frame 2, two mounting plates 22 are installed on the two conveying guide rails 21 in a sliding manner, the two mounting plates 22 are uniformly distributed and arranged, a fixing block 23 installed on the two conveying guide rails 21 in a sliding manner is fixedly installed at the bottom end of each mounting plate 22, and a driving device 24 for driving the two mounting plates 22 to move is arranged on the frame 2.

Referring to fig. 3 and 5, the driving device 24 includes two driving screws 25 and a rotating motor 26, the two driving screws 25 are rotatably installed on the frame 2 and are respectively located above the two conveying guide rails 21, two sections of threads with opposite spiral lines are formed on the driving screws 25, the two sections of threads on the driving screws 25 are respectively in threaded connection with the fixing blocks 23 on the two mounting plates 22, and the axial lines of the driving screws 25 are parallel to the sliding direction of the mounting plates 22. Driven wheels 251 are fixedly mounted at one ends of the two driving screws 25, a mounting seat 27 is fixedly mounted on the upper surface of the frame 2, the rotating motor 26 is fixedly mounted on the mounting seat 27, an output shaft of the rotating motor 26 horizontally penetrates out of the mounting seat 27 and is provided with a driving wheel 261, and driving belts 262 are sleeved on the two driven wheels 251 and the driving wheel 261.

Vertical waist-shaped holes 271 are formed in the side wall of the mounting seat 27 and located on two sides of the rotating motor 26 in the horizontal direction, compression sleeves are slidably mounted on the two waist-shaped holes 271, the compression sleeves abut against the side wall of the mounting seat 27, compression screws 281 penetrating out of the waist-shaped holes 271 are fixedly mounted on the compression sleeves, and compression nuts 282 abutting against the side wall of the mounting seat 27 are in threaded connection with the compression screws 281; the pressing wheel 28 tightly pressed on the driving belt 262 is rotatably arranged on the pressing sleeve, and the driving belt 262 tightly presses on the driving wheel 261 under the action of the pressing wheel 28.

Referring to fig. 1 and 5, a protective cover 283 is fixedly mounted on the frame 2, and the driven wheel 251 and the structure on the mounting seat 27 are both positioned in the protective cover 283.

Referring to fig. 3 and 6, the conveying belt 31 is installed on the side walls of the two opposite sides of the two installation plates 22 and located above the conveying guide rail 21, the installation plates 22 are rotatably installed with a first guide wheel 311 and a second guide wheel 312, the first guide wheel 311 and the second guide wheel 312 are uniformly distributed along the length direction of the installation plates 22, the second guide wheel 312 is located below the first guide wheel 311 and located between two adjacent first guide wheels 311, meanwhile, the two ends of the installation plates 22 in the length direction are both rotatably installed with third guide wheels 313 with the same shape and size as the first guide wheels 311, the first guide wheels 311 are located between the two third guide wheels 313, and meanwhile, the highest points of the third guide wheels 313 and the first guide wheels 311 are located on the same horizontal plane; a main guide wheel 314 is rotatably mounted on the mounting plate 22 below the second guide wheel 312.

A conveying motor 315 is fixedly arranged on the mounting plate 22, and an output shaft of the conveying motor 315 is connected with the main guide pulley 314 through a belt; the conveying belt 31 is sleeved on the main guide wheel 314, the third guide wheel 313, the first guide wheel 311 and the second guide wheel 312, the conveying belt 31 comprises a plurality of horizontal sections 316 and vertical sections 317, the conveying belt 31 winds around the third guide wheel 313 and the first guide wheel 311 to form the horizontal sections 316, and the conveying belt 31 winds around the first guide wheel 311 and the second guide wheel 312 to form the vertical sections 317; the mounting plate 22 is provided with a tensioning assembly 6 for tensioning the conveyor belt 31, and two horizontal tensioning holes 221 are horizontally and uniformly distributed on the mounting plate 22 between the third guide wheel 313 and the main guide wheel 314.

The circuit board is conveyed to the conveying belt 31, two ends of the circuit board are contacted with the side walls of the opposite sides of the two mounting plates 22, and the conveying motor 315 is started to drive the conveying belt 31 to move to convey the circuit board; the tensioning assembly 6 comprises a tensioning sleeve 61 and a tensioning wheel 62, a tensioning screw 611 is fixedly mounted on the tensioning sleeve 61, the tensioning screw 611 penetrates out of the tensioning hole 221, a tensioning nut 612 tightly abutting against the side wall of the mounting plate 22 is connected to the tensioning screw 611 in a threaded manner, and the tensioning sleeve 61 tightly abuts against the side wall of the mounting plate 22 under the action of the tensioning nut 612; the tension wheel 62 is rotatably mounted on the tension sleeve 61, and the tension wheel 62 abuts against the conveying belt 31. The mounting plate 22 is provided with a sliding groove 222 between two adjacent vertical sections 317, and the sliding groove 222 is communicated with the top end of the mounting plate 22 and penetrates through the side walls of the two opposite sides of the mounting plate 22.

A sliding frame 223 is vertically installed on the sliding groove 222 in a sliding manner, the sliding frame 223 is located on the two sliding grooves 222 close to one side of the third guide wheel 313, and two ends of the sliding frame 223 far away from the third guide wheel 313 are located outside the mounting plate 22; place board 32 joint and install on the frame 223 upper surface that slides, place on the board 32 lower surface fixed mounting have with the frame 223 upper surface joint complex joint post that slides, place on the board 32 and be located the both sides that are close to two mounting panels 22 and seted up two sets of bar holes 321, every group bar hole 321 all is provided with a plurality ofly along mounting panel 22 length direction equipartition simultaneously, and the mounting panel 22 that is located between two adjacent sliding grooves 222 slides and wears to establish on bar hole 321, and can slide on bar hole 321 when mounting panel 22 removes, frame 223 that slides can drive and place board 32 and slide to the below of first guide pulley 311 peak.

Referring to fig. 4 and 7, a lifting device 54 for driving the sliding frame 223 to vertically move is arranged on the frame 2, supporting seats 551 are fixedly arranged on the upper surface of the frame 2 and between the two groups of strip-shaped holes 321, the four supporting seats 551 are uniformly distributed, meanwhile, the projections of the four supporting seats 551 in the vertical direction are located in the projections of the sliding frame 223 in the vertical direction, a lifting device 54 is arranged on each supporting seat 551, each lifting device 54 comprises a lifting cylinder 55 and a lifting disc 56, the lifting cylinder 55 is fixedly arranged on the supporting seat 551, and the piston rod is vertically upward; a support rod is fixedly mounted on the sliding frame 223 above the lifting cylinder 55, and the lifting disc 56 is fixedly mounted on the piston rod of the lifting cylinder 55 and supported on the lower surface of the support rod.

All be provided with the spacing buffering subassembly 63 of being connected with frame 223 that slides on every supporting seat 551, spacing buffering subassembly 63 includes first slide bar 64, go up buffer 65, lower buffer 66, first slide bar 64 fixed mounting is on the bracing piece lower surface and vertical the sliding is worn to establish on supporting seat 551 upper surface, fixed mounting is on first buffer plate 651 on the bracing piece lower surface, the bottom fixed mounting of first buffer plate 651 has and is horizontally second buffer plate 652, fixed mounting has the buffer base 653 that extends the second buffer plate 652 top on the frame 2 upper surface, go up buffer 65 and lower buffer 66 and install respectively on buffer base 653 and supporting seat 551, second buffer plate 652 contacts with last buffer 65 when frame 223 that slides rises to the highest point, and the bracing piece contacts with lower buffer 66 when frame 223 that slides descends to the lowest point.

The connection structure of the upper buffer 65 and the buffer base 653 is the same as the connection structure of the lower buffer 66 and the support base 551, and the following buffer 66 is explained as an example, the lower buffer 66 vertically slides and is disposed on the upper surface of the support base 551, two buffer nuts 661 are screwed on the lower buffer 66, the two buffer nuts 661 are respectively abutted against the two opposite side walls of the support base 551, and the upper buffer 65 and the lower buffer 66 are both oil pressure buffers. Frame 2 upper surface and be located two supporting seats 551 between fixed mounting have two buffer cylinder 67, buffer cylinder 67 piston rod is vertical upwards and fixed mounting have with bracing piece fixed connection's unsteady joint 68, unsteady joint 68 so that buffer cylinder 67 and bracing piece are connected and have improved buffer cylinder 67's life-span, buffer cylinder 67 and lifting cylinder 55 start simultaneously and drive the frame 223 that slides from top to bottom.

Referring to fig. 3 and 8, a positioning hole 322 is formed in the middle of the placing plate 32 along the circuit board conveying direction, two positioning seats 331 are fixedly mounted on the frame 2 and located on one side of the positioning hole 322, which is far away from the circuit board input point, the two positioning seats 331 are respectively located on two sides of the positioning hole 322, a positioning plate 332 is vertically slidably mounted on the positioning seats 331, and the positioning column 33 is fixedly mounted on the positioning plate 332 and vertically slidably penetrates through the placing plate 32; the lifting device 34 is disposed on the positioning seat 331 and connected to the positioning plate 332, and the lifting device 34 includes a connection column 35 and a lifting cylinder 36.

A clamping hole 333 communicated with one end of the positioning plate 332 is formed in the upper surface of the positioning plate 332, the connecting column 35 is clamped and mounted in the clamping hole 333, and the section of the connecting column 35 is I-shaped and can rotate on the clamping hole 333; the lifting cylinder 36 is fixedly installed on the positioning seat 331, the lifting cylinder 36 is located below the positioning plate 332, and the piston rod is vertically upward; a lifting screw is fixedly mounted on a piston rod of the lifting air cylinder 36, the lifting screw is in threaded connection with the connecting column 35, and a lifting nut tightly abutting against the lower surface of the clamping column is in threaded connection with the lifting screw.

The frame 2 under the positioning hole 322 is slidably installed with a moving seat 711, the upper structure of the moving seat 711 is the same as that of the positioning seat 331, and the positioning posts 33 on the moving seat 711 can extend out of the upper surface of the placing plate 32 through the positioning hole 322, so that the positioning posts 33 on the moving seat 711 and the two positioning seats 331 abut against two opposite side walls of the circuit board; the frame 2 is provided with a moving mechanism 7 connected with a moving seat 711, the moving mechanism 7 comprises a moving track 71, a connecting plate 72 and a moving device 73, the moving track 71 is fixedly arranged on the frame 2 and is positioned below the positioning hole 322, and the moving seat 711 is arranged on the moving track 71 in a sliding manner, and the sliding direction is parallel to the conveying direction of the circuit board; the connecting plate 72 is fixedly installed on the side wall of the moving seat 711, and the moving device 73 is arranged on the frame 2 and connected with the connecting plate 72.

The moving device 73 comprises a synchronizing wheel 74, a synchronous belt 75 and a moving motor 76, wherein the synchronizing wheel 74 is rotatably installed on the frame 2, and two synchronizing wheels 74 are arranged and respectively located at two sides of the moving track 71; the synchronous belt 75 is sleeved on the two synchronous wheels 74, the connecting plate 72 is positioned below the synchronous belt 75 and between the two synchronous wheels 74, a clamping plate 721 is placed on the upper surface of the connecting plate 72, a moving screw (not shown in the figure) in threaded connection with the connecting plate 72 is installed on the clamping plate 721, and the clamping plate 721 is matched with the connecting plate 72 to clamp the synchronous belt 75; the moving motor 76 is fixedly installed on the frame 2 and connected to one of the synchronizing wheels 74, the moving motor 76 is started to drive the synchronizing wheel 74 to rotate, the synchronizing wheel 74 rotates to drive the synchronizing belt 75 to move, and the synchronizing belt 75 moves to drive the connecting plate 72 and the moving seat 711 to move on the moving rail 71.

Referring to fig. 1 and 9, the screen printing mechanism 4 includes a sliding seat 41, a screen 42, a sliding table 43, a wiping assembly 44, a first driving assembly 45, and a second driving assembly 46, wherein the sliding seat 41 is vertically slidably mounted on the support table 11, and the length direction of the sliding seat 41 is parallel to the length direction of the mounting plate 22.

Referring to fig. 9 and 10, the silk screen 42 is detachably mounted on the sliding seat 41 through the fixing device 8, the fixing device 8 includes a fixed rail 81, a fixed screw 82 and a positioning block 83, the fixed rail 81 is mounted on the sliding seat 41, a projection of the fixed rail 81 in a direction perpendicular to a length direction of the sliding seat 41 is C-shaped, and two fixed rails 81 are oppositely disposed.

Referring to fig. 1 and 9, a lifting assembly 84 connected with the fixed guide rail 81 is arranged on the sliding seat 41, the lifting assembly 84 includes two lifting seats 85 and two lifting cylinders 86, the two lifting seats 85 are fixedly mounted on a side wall of the sliding seat 41 close to one side of the mounting plate 22, and the two lifting seats 85 are respectively located at two ends of the sliding seat 41 in the length direction; the lifting cylinder 86 is fixedly installed on the upper surface of the lifting seat 85, a piston rod of the lifting cylinder 86 vertically penetrates through the lifting seat 85 downwards and extends to the lower part of the sliding seat 41, and the two fixed guide rails 81 are respectively and fixedly installed on the piston rods of the two lifting cylinders 86.

Referring to fig. 9 and 10, the fixing screws 82 are screwed on the upper surfaces of the fixing rails 81, the two fixing rails 81 are provided with the mounting frame 421 in a clamping manner, the silk screen 42 is fixedly mounted on the inner side wall of the mounting frame 421, and meanwhile, the silk screen 42 is provided with solder paste and is positioned right above the circuit board; the positioning blocks 83 are fixedly mounted on two opposite side walls of the mounting frame 421, the mounting frame 421 is clamped and mounted on the fixed guide rail 81, the positioning blocks 83 abut against the side walls of the fixed guide rail 81 to perform positioning, and meanwhile the fixing screw 82 is in threaded connection with the upper surface of the mounting frame 421.

The sliding table 43 is slidably mounted on the sliding seat 41 along the length direction of the sliding seat 41, and the sliding table 43 is located between the two lifting seats 85; the ink scraping assembly 44 is arranged on the sliding table 43 and is used for printing solder paste on the screen 42 onto a circuit board, the ink scraping assembly 44 comprises a scraper blade 441, an ink return blade 442, a lifting plate 443, a first ink scraping cylinder 444 and a second ink scraping cylinder 445, the scraper blade 441 and the ink return blade 442 are vertically mounted on the sliding table 43 in a sliding manner, the scraper blade 441 and the ink return blade 442 are arranged along the length direction of the sliding seat 41, and two lifting plates 443 are arranged and respectively mounted on the scraper blade 441 and the ink return blade 442; the first ink scraping cylinder 444 and the second ink scraping cylinder 445 are fixedly installed on the side wall of the sliding table 43 far away from the sliding base 41, and the first ink scraping cylinder 444 and the second ink scraping cylinder 445 are fixedly connected with the lifting plate 443 on the scraper 441 and the ink return blade 442 respectively.

The scraper 441 and the ink recovery blade 442 have the same shape and size, and the initial position of the scraper 441 is located below the ink recovery blade 442 and extends into the mounting frame 421, while the length directions of the scraper 441 and the ink recovery blade 442 are perpendicular to the length direction of the sliding seat 41, but the scraper 441 can be abutted against the screen 42 by the first ink scraping cylinder 444, and the ink recovery blade 442 can be close to the screen 42 by the second ink scraping cylinder 445 to flatten the solder paste on the screen 42.

Referring to fig. 10 and 11, the doctor blade 441 and the ink return blade 442 are connected to the lift plate 443 by the connecting device 9, and the connecting device 9 connected to the doctor blade 441 is explained below as an example, the connecting device 9 includes a connecting block 91, an elastic plate 92, a connecting screw 93, and a clamping screw 94, and the lift plate 443 is horizontal and has a longitudinal direction parallel to the longitudinal direction of the doctor blade 441.

The two connecting blocks 91 are fixedly arranged at two ends of the lifting plate 443 in the length direction, the connecting blocks 91 extend downwards to the outside of the lifting plate 443, meanwhile, the connecting blocks 91 below the lifting plate 443 are provided with clamping grooves 911, and the projection of the clamping grooves 911 along the length direction of the lifting plate 443 is T-shaped; the one end fixed mounting that elastic plate 92 is close to connecting block 91 has joint piece 921, and elastic plate 92 and joint piece 921 all slide and install on the joint groove 911 of two connecting blocks 91, and elastic plate 92 keeps away from the one end of joint piece 921 and offers elastic groove 922, and elastic groove 922 link up elastic plate 92 length direction's both ends.

Connecting screw 93 passes in connecting block 91 top extends joint groove 911, and connecting screw 93 and the equal threaded connection of connecting block 91 and joint piece 921 upper surface, and connecting screw 93 top fixed mounting has star type handle, twists and moves connecting screw 93 and can make the elastic plate 92 support tightly to joint groove 911. The top end of the scraper 441 is clamped and mounted on the elastic groove 922, the clamping screw 94 penetrates through the elastic plate 92 and the elastic groove 922 to extend out of the elastic plate 92, a fixing nut tightly abutting against the side wall of the elastic plate 92 is connected to the clamping screw 94 in a threaded mode, and the clamping screw 94 and the fixing nut are matched to clamp the scraper 441.

Referring to fig. 9 and 10, the first driving assembly 45 is disposed on the machine platform 1 and connected to the sliding seat 41, the first driving assembly 45 includes a first driving motor 451, a driving disc 452, a connecting rod 453, and a crank 454, the first driving motor 451 is fixedly mounted on the machine platform 1, the driving disc 452 is mounted on an output shaft of the first driving motor 451, one end of the connecting rod 453 is rotatably connected to a lower surface of the sliding seat 41, a fixing rod 4521 is eccentrically and fixedly mounted on the driving disc 452, one end of the crank 454 is fixedly mounted on the fixing rod 4521, and one end of the crank 454, which is far away from the fixing rod 4521, is rotatably connected to one end of the connecting rod 453, which is far away. The second driving assembly 46 is disposed on the sliding seat 41 and connected with the sliding table 43,

referring to fig. 10 and 11, the second driving assembly 46 includes a moving screw 461, a first bevel gear 462, a second driving motor 463, and a second bevel gear 464, the moving screw 461 is rotatably installed on the inner side wall of the sliding seat 41, the axis of the moving screw 461 is parallel to the length direction of the sliding seat 41, the sliding table 43 extends to the inner side wall of the sliding seat 41 and is in threaded connection with the moving screw 461, and the first bevel gear 462 is connected to the moving screw 461 in a key manner.

Referring to fig. 9 and 11, the second driving motor 463 is fixedly installed on an outer sidewall of the sliding seat 41 and an output shaft thereof extends into the sliding seat 41, and the second bevel gear 464 is keyed on the output shaft of the second driving motor 463 and engaged with the first bevel gear 462.

The working principle of the embodiment of the application is as follows:

the circuit board is carried on conveyer belt 31, conveying motor 315 starts conveyer belt 31 and moves along, lift cylinder 36 that is located positioning seat 331 starts to drive reference column 33 and shifts up, the circuit board contacts with reference column 33, lift cylinder 55 starts to drive and places board 32 and shifts up, make the circuit board keep away from with conveyer belt 31, lift cylinder 55 that is located on removal seat 711 simultaneously drives reference column 33 and moves up, with this to carry on spacingly to the circuit board, place board 32 and move up and drive second buffer 652 and move up, second buffer 652 and last buffer 65 contact, the circuit board has been reduced and has been produced the vibration probability on placing board 32, the impaired probability of circuit board has been reduced, the quality of circuit board has been improved.

The first driving motor 451 starts to drive the sliding base 41 to move downwards, the sliding base 41 moves downwards to drive the screen 42 to contact the circuit board, the first ink scraping cylinder 444 starts to drive the scraper 441 to move downwards, the scraper 441 abuts against the screen 42, the second driving motor 463 drives the scraper 441 to move so as to print the solder paste on the screen 42 onto the circuit board, after the specified position is reached, the first ink scraping cylinder 444 drives the scraper 441 to move away from the screen 42, meanwhile, the second ink scraping cylinder 445 starts to drive the ink returning blade 442 to move downwards, so that the ink returning blade 442 is close to the screen 42, the second driving motor 463 starts to drive the ink returning blade 442 to move, and therefore, the ink returning blade 442 flattens the solder paste on the screen 42.

Then the first driving motor 451 starts to drive the sliding seat 41 to move upwards, so the silk screen 42 is far away from the circuit board, the lifting cylinders 36 on the positioning seat 331 and the moving seat 711 are simultaneously started to drive the positioning post 33 to move downwards, and the lifting cylinder 55 is started to drive the circuit board to move downwards, so the supporting rod is contacted with the lower buffer 66, the vibration probability of the circuit board on the placing plate 32 is reduced, so the circuit board is contacted with the conveying belt 31, the circuit board moves forwards to the next procedure under the action of the conveying belt 31, thereby the loading and the printing of the circuit board with the solder paste are completed without manpower, the time is saved, and the problem of low production efficiency of the screen printing machine is solved.

After the size of the circuit board changes, the rotating motor 26 starts the two mounting plates 22 to move, so that the positions of the two conveying belts 31 are adjusted, the distance between the two mounting plates 22 is adjusted to be suitable for limiting the circuit boards with different sizes, and meanwhile, the board 32 is placed to support the whole circuit board, so that the deformation probability of the circuit board is reduced, and the quality of the circuit board is improved.

When the circuit board size changes and the distance between the positioning posts 33 on the positioning seat 331 and the moving seat 711 needs to be adjusted, the moving motor 76 is started to drive the moving seat 711 and the positioning posts 33 to move, and the positioning holes 322 are convenient for the positioning posts 33 on the moving seat 711 to extend out of the upper surface of the placing plate 32, so that the positioning posts 33 can limit the circuit boards with different sizes.

The lifting cylinder 55 is started to drive the mounting frame 421 to be far away from the scraper 441, the fixing screw 82 is screwed to be separated from the mounting frame 421, so that the mounting frame 421 and the silk screen 42 can be replaced, the positioning block 83 abuts against the fixing guide rail 81 to be positioned, the silk screen 42 is replaced to meet the requirement of different positions of solder paste on a circuit board, the time for replacing the silk screen 42 is saved, the time is saved, the production efficiency of the silk screen printing machine is improved, after the replacement is completed, the lifting cylinder 55 is started to drive the mounting frame 421 and the silk screen 42 to move back to the original position, and the probability that the mounting frame 421 collides with the scraper 441 to cause the scraper 441 to be damaged is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a silk screen printing machine for circuit board, includes frame (2), its characterized in that: be provided with silk-screen printing mechanism (4) on frame (2), be provided with conveyor (3) that carry the circuit board on frame (2), conveyor (3) are including conveyer belt (31), place board (32), reference column (33), elevating gear (34), conveyer belt (31) set up in frame (2) and are used for carrying the circuit board, place board (32) and set up in frame (2) and come to support the circuit board, reference column (33) slide and set up in frame (2) and are used for fixing a position the circuit board, elevating gear (34) set up in frame (2) and are connected with reference column (33).

2. The screen printing machine for the circuit board as claimed in claim 1, wherein: elevating gear (34) include spliced pole (35), lift cylinder (36), spliced pole (35) vertical setting of sliding is in frame (2) and be connected with reference column (33), lift cylinder (36) set up in frame (2) and be connected with spliced pole (35).

3. The screen printing machine for the circuit board as claimed in claim 1, wherein: reference column (33) and elevating gear (34) all are provided with two, and two along circuit board traffic direction equipartition reference column (33) contradict respectively on the both sides wall that the circuit board is relative.

4. The screen printing machine for the circuit board as claimed in claim 3, wherein: the circuit board positioning device is characterized in that a moving seat (711) is arranged on the rack (2) in a sliding mode along the running direction of the circuit board, one of the positioning columns (33) and the lifting device (34) are arranged on the moving seat (711), and a moving mechanism (7) connected with the moving seat (711) is arranged on the rack (2).

5. The screen printing machine for the circuit board as claimed in claim 4, wherein: the moving mechanism (7) comprises a moving track (71), a connecting plate (72) and a moving device (73), the moving track (71) is arranged on the rack (2) and a moving seat (711) is arranged on the moving track (71) in a sliding mode, the connecting plate (72) is arranged on the moving seat (711), and the moving device (73) is arranged on the rack (2) and connected with the connecting plate (72).

6. The screen printing machine for the circuit board as claimed in claim 5, wherein: mobile device (73) include synchronizing wheel (74), hold-in range (75), moving motor (76), synchronizing wheel (74) rotate set up in frame (2) and horizontal equipartition is provided with two, hold-in range (75) cover is established on two synchronizing wheels (74) and is connected with connecting plate (72), moving motor (76) set up in frame (2) and be connected with one of them synchronizing wheel (74).

7. The screen printing machine for the circuit board as claimed in claim 1, wherein: the placing plate (32) is arranged on the rack (2) in a sliding mode, and a lifting device (54) connected with the placing plate (32) is arranged on the rack (2).

8. The screen printing machine for circuit boards of claim 7, wherein: the lifting device (54) comprises a lifting cylinder (55) and a lifting disc (56), the lifting cylinder (55) is arranged on the rack (2) and a piston rod of the lifting cylinder is vertically upward, and the lifting disc (56) is arranged on the piston rod of the lifting cylinder (55) and is supported on the lower surface of the placing plate (32).

9. The screen printing machine for the circuit board as claimed in claim 8, wherein: the buffer device is characterized in that a limiting buffer component (63) connected with the placing plate (32) is arranged on the rack (2), the limiting buffer component (63) comprises a sliding rod (64), an upper buffer (65) and a lower buffer (66), the sliding rod (64) is arranged on the lower surface of the placing plate (32) and is arranged on the rack (2) in a sliding mode, and the upper buffer (65) and the lower buffer (66) are arranged on the rack (2) and respectively buffer when the placing plate (32) ascends and descends to a specified position.

Images