A solder paste printer for flexible PCB boards

Abstract

A solder paste printer for flexible PCB boards, which relates to the technical field of solder paste printers. It includes: a mounting base plate, a control mechanism, and a correction platform, a tensioning mechanism, an alignment platform, a CCD mechanism, and a stencil lifting mechanism that are provided on the mounting base plate and are all electrically connected to the control mechanism; the correction platform is used to adjust the position of the working platform located on it, the tensioning mechanism is located at the input end of the correction platform and is used to tension the flexible PCB board, the alignment platform is located at the output end of the correction platform and is used to tension and pull the flexible PCB board to a specified position, the stencil lifting mechanism is located on one side of the correction platform and is used to control the stencil to print on the flexible PCB board located on the working platform, and the CCD mechanism is located on the other side of the correction platform and is used to detect the printed flexible PCB board. By adopting the above technical solution, it has the advantage of good printing effect for flexible PCB boards.

Description

Technical Field

[0001] The present invention relates to the technical field of solder paste printers, and particularly to a solder paste printer for flexible PCB boards. Background Art

[0002] Modern solder paste printers generally consist of mechanisms such as plate loading, solder paste adding, imprinting, and circuit board conveying. Its working principle is as follows: First, fix the circuit board to be printed on the printing positioning table, and then use the left and right scrapers of the printer to screen-print the solder paste or red glue through the stencil onto the corresponding pads. For the PCB with uniform screen printing, it is input to the mounter through the transfer table for automatic chip mounting.

[0003] However, for existing solder paste printers, the printing effect on flexible PCB boards is not good. Summary of the Invention

[0004] The purpose of the present invention is to provide a solder paste printer for flexible PCB boards, which has the advantage of good printing effect on flexible PCB boards, aiming at the defects and deficiencies of the existing technology.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: A solder paste printer for flexible PCB boards, comprising: a mounting base plate, a control mechanism, and a correction platform, a tensioning mechanism, an alignment platform, a CCD mechanism, and a stencil lifting mechanism that are arranged on the mounting base plate and are all electrically connected to the control mechanism; the correction platform is used to adjust the position of the working platform on it, the tensioning mechanism is located at the input end of the correction platform and is used to tension the flexible PCB board, the alignment platform is located at the output end of the correction platform and is used to tension and pull the flexible PCB board to a specified position, the stencil lifting mechanism is located on one side of the correction platform and is used to control the stencil to print on the flexible PCB board located on the working platform, and the CCD mechanism is located on the other side of the correction platform and is used to detect the printed flexible PCB board.

[0006] The present invention is further provided that the solder paste printer for flexible PCB boards further comprises: a protective shell provided with a feed inlet and a discharge outlet, and a frame arranged inside the protective shell; the mounting base plate, the control mechanism, the correction platform, the tensioning mechanism, the alignment platform, the CCD mechanism, and the stencil lifting mechanism are all located inside the protective shell; the input end of the tensioning mechanism is located at the feed inlet, and the output end of the alignment platform is located at the discharge outlet.

[0007] The present invention is further configured such that the tensioning mechanism includes: a tensioning mechanism base, a U-shaped bracket assembled on the tensioning mechanism base, a first tension roller mounted on the U-shaped bracket, a pressing roller mounted on the U-shaped bracket and located above the first tension roller, extension brackets respectively assembled at different ends on the same side of the U-shaped bracket, a second tension roller mounted on the extension brackets and parallel to both the first tension roller and the pressing roller, and a tensioning mechanism controller for transmitting power with its output end connected to one end of the first tension roller; the flexible PCB board passes between the first tension roller and the pressing roller and covers the upper side of the second tension roller.

[0008] The present invention is further configured such that a first slider is provided on the lower side of the U-shaped bracket, a first slide bar for the first slider to slide is provided on the upper side of the tensioning mechanism base, a second slider is provided on the lower side of the tensioning mechanism base, a second slide bar for the second slider to slide is provided on the lower side of the second slider, and the first slide bar and the second slide bar are perpendicularly arranged.

[0009] The present invention is further configured such that the tensioning mechanism controller is a magnetic particle brake or a servo motor.

[0010] The present invention is further configured such that the alignment platform includes: a positioning track, two belt pulleys respectively assembled at both inner ends of the positioning track, a belt assembled between the two belt pulleys, an alignment platform control motor with its output end connected to one of the belt pulleys, a fixed seat fixedly assembled at the output end of the positioning track, a movable seat fixedly assembled on the belt and sliding on the positioning track, four alignment platform lifting cylinders respectively assembled on both sides of the fixed seat and both sides of the movable seat, and a clamping plate assembled on the upper side of the alignment platform lifting cylinders; the flexible PCB board is laid on the upper sides of the fixed seat and the movable seat; the alignment platform lifting cylinders are controlled to drive the clamping plate to clamp or loosen the flexible PCB board.

[0011] The present invention is further configured such that a moving device for driving the positioning track to move is provided on the lower side of the positioning track; the moving device includes: an alignment platform base, a third slider fixedly assembled on the lower side of the positioning track, a third slide bar fixedly assembled on the upper side of the alignment platform base for the third slider to slide, a fourth slider fixedly assembled on the lower side of the alignment platform base, and a fourth slide bar provided on the lower side of the fourth slider for the fourth slider to slide; the third slide bar and the fourth slide bar are perpendicularly arranged.

[0012] The present invention is further provided that the CCD mechanism includes: a support base, a first slide rail provided on the support base, a first lead screw provided on the first slide rail, a slider slid on the first lead screw, a CCD-X axis motor provided at one end of the first lead screw for controlling the slider, a second slide rail provided on the slider and perpendicular to the first slide rail, a second lead screw provided on the second slide rail, a CCD camera slid on the second lead screw, a CCD light source assembled under the CCD camera, and a CCD-Y axis motor provided at one end of the second lead screw for controlling the CCD camera.

[0013] The present invention is further provided that the correction platform includes: a correction platform main body, and a correction platform X axis motor, a correction platform Y axis motor, and a correction platform lifting cylinder provided on the correction platform main body for controlling the correction platform main body.

[0014] After adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0015] 1. In the present invention, a control mechanism, a correction platform, a tensioning mechanism, a registration platform, a CCD mechanism, and a stencil lifting mechanism are provided, realizing continuous automatic printing of flexible PCB boards; and through the cooperation of the tensioning mechanism and the registration platform, the flexible PCB board is tensioned and pulled to a set position, making the printing effect of the flexible PCB board better.

[0016] 2. In the present invention, a first tension roller, a second tension roller, a pressing roller, and a tensioning mechanism controller are provided. When in use, the flexible PCB board is threaded between the first tension roller and the pressing roller and covers the upper side of the second tension roller. The tensioning mechanism controller can transmit and brake torque, and by controlling the first tension roller, the continuous sliding and tension control of the flexible PCB board can be controlled, making the printing effect of the flexible PCB board better after entering the working platform on the correction platform.

[0017] 3. In the present invention, the lifting of the registration platform lifting cylinder drives the clamping plate to clamp or loosen the flexible PCB board, and the registration platform control motor drives the belt to move, thereby driving the movable seat to slide back and forth on the positioning track. Through the cooperation of the fixed seat, the movable seat, and the components thereon, the flexible PCB board is pressed, and under the control of the control mechanism, the flexible PCB board is driven to a specified position. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural view of the present invention;

[0020] Figure 2 is a schematic structural view of the main body of the present invention;

[0021] Figure 3 is a schematic structural view of the tensioning mechanism;

[0022] Figure 4 is another schematic structural view of the tensioning mechanism;

[0023] Figure 5 is a schematic structural view of the alignment platform laid with a flexible PCB board;

[0024] Figure 6 is a schematic structural view of the alignment platform equipped with a platform panel;

[0025] Figure 7 is a schematic structural view of the alignment platform;

[0026] Figure 8 is a schematic structural view of the movable seat;

[0027] Figure 9 is a schematic structural view of the moving device;

[0028] Figure 10 is a schematic structural view of the CCD mechanism;

[0029] Figure 11 is a schematic structural view of the correction platform.

[0030] Description of reference numerals: 100, mounting base plate; 200, control mechanism; 300, correction platform; 301, working platform; 302, correction platform main body; 303, correction platform X-axis motor; 304, correction platform Y-axis motor; 305, correction platform lifting cylinder; 400, tensioning mechanism; 401, tensioning mechanism base; 402, U-shaped bracket; 403, first tension roller; 404, pressing roller; 405, extension bracket; 406, second tension roller; 407, first slider; 408, first slide bar; 409, second slider; 410, second slide bar; 411, first protective plate; 412, second protective plate; 413, extension plate; 414, auxiliary bracket; 415, third tension roller; 416, servo motor; 500, alignment platform; 501, positioning track; 502, pulley; 503, belt; 504, alignment platform control motor; 505, fixed seat; 506, movable seat; 5061, fifth slider; 5062, support member; 5063, connecting member; 5064, support plate; 507, alignment platform lifting cylinder; 508, clamping plate; 509, moving device; 5091, alignment platform base; 5092, third slider; 5093, third slide bar; 5094, fourth slider; 5095, fourth slide bar; 510, positioning plate; 511, platform panel; 600, CCD mechanism; 601, support base; 602, first slide rail; 603, first lead screw; 604, slider; 605, CCD-X-axis motor; 606, second slide rail; 607, second lead screw; 608, CCD-camera; 609, CCD-light source; 610, CCD-Y-axis motor; 700, stencil lifting mechanism; 701, stencil; 800, flexible PCB board; 900, protective shell; 901, feed inlet; 902, discharge outlet; 903, observation window; 1000, frame. Detailed implementation manners

[0031] The present invention will be further described in detail below with reference to the accompanying drawings.

[0032] This specific embodiment is only an interpretation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0033] This embodiment relates to a solder paste printer for flexible PCB boards, as Figure 1 and Figure 2 shown, including: a mounting base plate 100, a control mechanism 200, and a correction platform 300, a tensioning mechanism 400, an alignment platform 500, a CCD mechanism 600, and a stencil lifting mechanism 700 which are disposed on the mounting base plate 100 and are all electrically connected to the control mechanism 200.

[0034] Specifically, the correction platform 300 is used to adjust the position of the working platform 301 located thereon. The tensioning mechanism 400 is located at the input end of the correction platform 300 and is used to tension the flexible PCB board 800. The alignment platform 500 is located at the output end of the correction platform 300 and is used to tension and pull the flexible PCB board 800 to a specified position. The stencil lifting mechanism 700 is located on one side of the correction platform 300 and is used to control the stencil 701 to print on the flexible PCB board 800 located on the working platform 301. The CCD mechanism 600 is located on the other side of the correction platform 300 and is used to detect the printed flexible PCB board 800. The cooperation of the above structures realizes the continuous automatic printing of the flexible PCB board 800; and through the cooperation of the tensioning mechanism 400 and the alignment platform 500, the flexible PCB board 800 is tensioned and pulled to the set position, making the printing effect of the flexible PCB board 800 better.

[0035] Preferably, as Figure 1 shown, the solder paste printer for flexible PCB boards further includes: a protective shell 900 provided with a feed inlet 901 and a discharge outlet 902, and a frame 1000 provided inside the protective shell 900. The mounting base plate 100, the control mechanism 200, the correction platform 300, the tensioning mechanism 400, the alignment platform 500, the CCD mechanism 600, and the stencil lifting mechanism 700 are all located inside the protective shell 900. The input end of the tensioning mechanism 400 is located at the feed inlet 901, and the output end of the alignment platform 500 is located at the discharge outlet 902. By providing the protective shell 900 and the frame 1000, the solder paste printer for flexible PCB boards is more integral and has a protective effect. In addition, an observation window 903 is also provided on the protective shell 900, which is convenient for the staff to timely observe the working state and process of the solder paste printer for flexible PCB boards.

[0036] Specifically, in this embodiment, as Figure 3As shown in the figure, the tensioning mechanism 400 includes: a tensioning mechanism base 401, a U-shaped bracket 402 assembled on the tensioning mechanism base 401, a first tension roller 403 mounted on the U-shaped bracket 402, a pressing roller 404 mounted on the U-shaped bracket 402 and located above the first tension roller 403, extension brackets 405 respectively assembled at different ends on the same side of the U-shaped bracket 402, a second tension roller 406 mounted on the extension brackets 405 and parallel to both the first tension roller 403 and the pressing roller 404, and a tensioning mechanism controller for transmitting power with its output end connected to one end of the first tension roller 403. The flexible PCB board 800 passes between the first tension roller 403 and the pressing roller 404 and covers the upper side of the second tension roller 406. By providing the first tension roller 403, the second tension roller 406, the pressing roller 404 and the tensioning mechanism controller, during use, the flexible PCB board 800 passes between the first tension roller 403 and the pressing roller 404 and covers the upper side of the second tension roller 406. The tensioning mechanism controller can transmit and brake torque, and by controlling the first tension roller 403, it can further control the continuous sliding and tension control of the flexible PCB board 800, making the printing effect better after the flexible PCB board 800 enters the working platform 301 on the correction platform 300. In this embodiment, the tensioning mechanism controller is a servo motor 416, which has the advantages of compact structure, fast response, simple operation, safe and reliable use, good durability, and easy implementation of remote control; specifically, the servo control mode of the servo motor 416 adopts a position and torque hybrid mode. When transporting the flexible PCB board 800, the servo control mode switches to the position mode for precise feeding; after the flexible PCB board 800 arrives, the servo control mode switches to the torque mode to reverse-tension the material. In other embodiments, the tensioning mechanism controller can be a magnetic powder brake, which has the advantages of fast response speed, simple structure, no pollution, no noise, no impact vibration, and energy saving.

[0037] Furthermore, in order to enable the tensioning mechanism 400 to adjust its position, as Figure 3 shown, a first slider 407 is provided on the lower side of the U-shaped bracket 402, a first slide bar 408 for the first slider 407 to slide is provided on the upper side of the tensioning mechanism base 401, a second slider 409 is provided on the lower side of the tensioning mechanism base 401, a second slide bar 410 for the second slider 409 to slide is provided on the lower side of the second slider 409, and the first slide bar 408 and the second slide bar 410 are perpendicularly arranged. By providing the first slider 407 and the first slide bar 408, the second slider 409 and the second slide bar 410, and with the first slide bar 408 and the second slide bar 410 perpendicularly arranged, the tensioning mechanism 400 can move along the X-axis and the Y-axis.

[0038] As a preferred solution, as Figure 4As shown in the figure, first protection plates 411 with upper ends lower than the upper end of the first tension roller 403 are respectively assembled on both sides of the U-shaped bracket 402. A second protection plate 412 for installing the servo motor 416 is assembled at one end of the U-shaped bracket 402. By providing the first protection plate 411 and the third protection plate, the overall stability of the tensioning mechanism 400 is strengthened, and it also plays a role in protecting the first tension roller 403, the second tension roller 406, and the servo motor 416. Moreover, since the upper end of the first protection plate 411 is lower than the upper end of the first tension roller 403, the first protection plate 411 does not affect the movement of the flexible PCB board 800.

[0039] As Figure 4 shown in the figure, an extension plate 413 for placing the flexible PCB board 800 is assembled on the first protection plate 411 away from the second tension roller 406. By providing the extension plate 413, the movement of the flexible PCB board 800 on the tensioning mechanism 400 becomes smoother. An auxiliary bracket 414 is also provided on the extension plate 413; a number of third tension rollers 415 are provided on the auxiliary bracket 414. By providing the auxiliary bracket 414 and a number of third tension rollers 415, the tensioning effect of the tensioning mechanism 400 becomes more prominent.

[0040] As another preferred solution, as Figure 5 and Figure 7 shown in the figure, the alignment platform 500 includes: a positioning track 501, two pulleys 502 respectively assembled at both inner ends of the positioning track 501, a belt 503 assembled between the two pulleys 502, an alignment platform control motor 504 with an output end connected to one of the pulleys 502, a fixed seat 505 fixedly assembled at the output end of the positioning track 501, a movable seat 506 fixedly assembled on the belt 503 and sliding on the positioning track 501, four alignment platform lifting cylinders 507 respectively assembled on both sides of the fixed seat 505 and both sides of the movable seat 506, and a clamping plate 508 assembled on the upper side of the alignment platform lifting cylinder 507.

[0041] As Figure 5 shown in the figure, the flexible PCB board 800 is laid on the upper sides of the fixed seat 505 and the movable seat 506. The alignment platform lifting cylinder 507 lifts to drive the clamping plate 508 to clamp or release the flexible PCB board 800. The alignment platform control motor 504 drives the belt 503 to move, thereby driving the movable seat 506 to slide back and forth on the positioning track 501. Through the cooperation of the fixed seat 505, the movable seat 506, and the components thereon, the flexible PCB board 800 is pressed, and under the control of the control mechanism 200, the flexible PCB board 800 is driven to a specified position.

[0042] The specific working steps are as follows: First, the clamping plate 508 on the alignment platform lifting cylinder 507 on the fixed seat 505 presses the flexible PCB board 800; Subsequently, the movable seat 506 retreats to a specified position driven by the alignment platform control motor 504, and the alignment platform lifting cylinder 507 on the movable seat 506 presses down, and its clamping plate 508 presses the flexible PCB board 800; Then the alignment platform lifting cylinder 507 on the fixed seat 505 rises, and its clamping plate 508 releases the flexible PCB board 800; Finally, the movable seat 506 advances driven by the alignment platform control motor 504 and presses and drags the flexible PCB board 800 to the specified position. The above steps are cycled until the entire flexible PCB board 800 is printed.

[0043] Further, as Figure 6 shown, the alignment platform 500 further includes: two positioning plates 510 assembled at both outer ends of the positioning track 501, and a platform panel 511 assembled on the upper side of the positioning plates 510 and located on the upper sides of the fixed seat 505 and the movable seat 506. The flexible PCB board 800 is laid on the upper side of the platform panel 511. By providing the platform panel 511 for carrying the flexible PCB board 800, the movement of the flexible PCB board 800 is made smoother.

[0044] Further, in order to enable the alignment platform 500 to adjust its position, as Figure 9 shown, a moving device 509 for driving the positioning track 501 to move is provided under the positioning track 501. Specifically, the moving device 509 includes: a counterpoint platform base 5091, a third slider 5092 fixedly assembled under the positioning track 501, a third slide bar 5093 fixedly assembled on the upper side of the counterpoint platform base 5091 for the third slider 5092 to slide, a fourth slider 5094 fixedly assembled on the lower side of the counterpoint platform base 5091, and a fourth slide bar 5095 provided under the fourth slider 5094 for the fourth slider 5094 to slide. The third slide bar 5093 and the fourth slide bar 5095 are perpendicularly arranged, enabling the alignment platform 500 to move along the X-axis and the Y-axis.

[0045] Even further, as Figure 8 shown, specifically, the movable seat 506 includes: a fifth slider 5061 slidably assembled on the positioning track 501, a support member 5062 fixedly assembled on the fifth slider 5061, a connecting member 5063 fixedly assembled on the support member 5062 and fixedly assembled on the belt 503, and a support plate 5064 fixedly assembled on the support member 5062. The connecting member 5063 is fixed on the belt 503, and the fifth slider 5061 is assembled on the positioning track 501. The alignment platform control motor 504 drives the belt 503 to move, thereby driving the connecting member 5063, and then driving the fifth slider 5061 to slide on the positioning track 501.

[0046] As another preferred solution, as Figure 10 shown, the CCD mechanism 600 includes: a support base 601, a first slide rail 602 provided on the support base 601, a first lead screw 603 provided on the first slide rail 602, a slider 604 sliding on the first lead screw 603, a CCD-X axis motor 605 provided at one end of the first lead screw 603 for controlling the slider 604, a second slide rail 606 provided on the slider 604 and perpendicular to the first slide rail 602, a second lead screw 607 provided on the second slide rail 606, a CCD-camera 608 sliding on the second lead screw 607, a CCD-light source 609 assembled under the CCD-camera 608, and a CCD-Y axis motor 610 provided at one end of the second lead screw 607 for controlling the CCD-camera 608. The CCD mechanism 600 helps to give feedback to the control mechanism 200, enabling the control mechanism 200 to more precisely control the stencil lifting mechanism 700 to print the flexible PCB board 800.

[0047] As another preferred solution, as Figure 11 shown, the correction platform 300 includes: a correction platform main body 302, and a correction platform X-axis motor 303, a correction platform Y-axis motor 304, and a correction platform lifting cylinder 305 provided on the correction platform main body 302 for controlling the correction platform main body 302.

[0048] The working principle of the present invention is generally as follows: Place the flexible PCB board 800 to be printed on the tensioning mechanism 400, and then through the control of the control mechanism 200, the tensioning mechanism 400 transports the flexible PCB board 800 to the correction platform 300 and then to the alignment platform 500. Then, the alignment platform 500 will press the flexible PCB board 800 and, under the control of the control mechanism 200, drag the flexible PCB board 800 to the designated position. The control mechanism 200 will also control the stencil lifting mechanism 700 to perform the printing work. The CCD mechanism 600 detects the printed flexible PCB board 800, and after printing, the flexible PCB board 800 flows into the next process.

[0049] The above is only used to illustrate the technical solution of the present invention and not to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A solder paste printer for flexible PCB boards, characterized in that, it includes: a mounting base plate (100), a control mechanism (200), and a correction platform (300), a tensioning mechanism (400), an alignment platform (500), a CCD mechanism (600), and a stencil lifting mechanism (700) that are arranged on the mounting base plate (100) and are all electrically connected to the control mechanism (200); the correction platform (300) is used to adjust the position of the working platform (301) on it, the tensioning mechanism (400) is located at the input end of the correction platform (300) and is used to tension the flexible PCB board (800), the alignment platform (500) is located at the output end of the correction platform (300) and is used to tension and pull the flexible PCB board (800) to a specified position, the stencil lifting mechanism (700) is located on one side of the correction platform (300) and is used to control the stencil (701) to print on the flexible PCB board (800) located on the working platform (301), and the CCD mechanism (600) is located on the other side of the correction platform (300) and is used to detect the printed flexible PCB board (800); the solder paste printer for flexible PCB boards further includes: a protective shell (900) provided with a feed inlet (901) and a discharge outlet (902), and a frame (1000) arranged in the protective shell (900); the mounting base plate (100), the control mechanism (200), the correction platform (300), the tensioning mechanism (400), the alignment platform (500), the CCD mechanism (600), and the stencil lifting mechanism (700) are all located in the protective shell (900); the input end of the tensioning mechanism (400) is located at the feed inlet (901), and the output end of the alignment platform (500) is located at the discharge outlet (902); the tensioning mechanism (400) includes: a tensioning mechanism base (401), a U-shaped bracket (402) assembled on the tensioning mechanism base (401), a first tension roller (403) mounted on the U-shaped bracket (402), a pressing roller (404) mounted on the U-shaped bracket (402) and located on the first tension roller (403), extension brackets (405) respectively assembled at different ends on the same side of the U-shaped bracket (402), a second tension roller (406) mounted on the extension brackets (405) and parallel to both the first tension roller (403) and the pressing roller (404), and a tensioning mechanism controller whose output end is connected to one end of the first tension roller (403) and is used to transmit power; the flexible PCB board (800) passes through between the first tension roller (403) and the pressing roller (404) and covers the upper side of the second tension roller (406).

2. The solder paste printer for flexible PCB boards according to claim 1, characterized in that, A first slider (407) is provided on the lower side of the U-shaped bracket (402). A first slide bar (408) for the first slider (407) to slide is provided on the upper side of the tensioning mechanism base (401). A second slider (409) is provided on the lower side of the tensioning mechanism base (401). A second slide bar (410) for the second slider (409) to slide is provided on the lower side of the second slider (409). The first slide bar (408) and the second slide bar (410) are perpendicularly arranged.

3. The solder paste printer for flexible PCB boards according to claim 1, characterized in that, the tensioning mechanism controller is a magnetic powder brake or a servo motor (416).

4. The solder paste printer for flexible PCB boards according to claim 1, characterized in that, the alignment platform (500) includes: a positioning track (501), two belt pulleys (502) respectively assembled at both inner ends of the positioning track (501), a belt (503) assembled between the two belt pulleys (502), an alignment platform (500) control motor with an output end connected to one of the belt pulleys (502), a fixed seat (505) fixedly assembled at the output end of the positioning track (501), a movable seat (506) fixedly assembled on the belt (503) and sliding on the positioning track (501), four alignment platform (500) lifting cylinders respectively assembled on both sides of the fixed seat (505) and both sides of the movable seat (506), and a clamping plate (508) assembled on the upper sides of the alignment platform (500) lifting cylinders; the flexible PCB board (800) is laid on the upper sides of the fixed seat (505) and the movable seat (506); the alignment platform (500) lifting cylinders are controlled to drive the clamping plate (508) to clamp or loosen the flexible PCB board (800).

5. The solder paste printer for flexible PCB boards according to claim 4, characterized in that, a moving device (509) for driving the positioning track (501) to move is provided on the lower side of the positioning track (501); the moving device (509) includes: a counterpoint platform base (5091), a third slider (5092) fixedly assembled on the lower side of the positioning track (501), a third slide bar (5093) fixedly assembled on the upper side of the counterpoint platform (500) base for the third slider (5092) to slide, a fourth slider (5094) fixedly assembled on the lower side of the counterpoint platform base (5091), and a fourth slide bar (5095) provided on the lower side of the fourth slider (5094) for the fourth slider (5094) to slide; the third slide bar (5093) and the fourth slide bar (5095) are perpendicularly arranged.

6. The solder paste printer for flexible PCB boards according to claim 1, characterized in that, The CCD mechanism (600) includes: a support base (601), a first slide rail (602) provided on the support base (601), a first lead screw (603) provided on the first slide rail (602), a slider (604) sliding on the first lead screw (603), a CCD-X axis motor (605) provided at one end of the first lead screw (603) for controlling the slider (604), a second slide rail (606) provided on the slider (604) and perpendicular to the first slide rail (602), a second lead screw (607) provided on the second slide rail (606), a CCD-camera (608) sliding on the second lead screw (607), a CCD-light source (609) assembled under the CCD-camera (608), and a CCD-Y axis motor (610) provided at one end of the second lead screw (607) for controlling the CCD-camera (608).

7. The solder paste printer for flexible PCB boards according to claim 1, wherein, the correction platform (300) includes: a correction platform main body (302), and a correction platform X-axis motor (303), a correction platform Y-axis motor (304), and a correction platform lifting cylinder (305) provided on the correction platform main body (302) for controlling the correction platform main body (302).

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