A circuit board silk printing resist soldering turnover device and a silk printing resist soldering method

Abstract

The present application relates to printed circuit board manufacturing technology field, especially to a kind of circuit board silk printing resistance soldering turnover device and silk printing resistance soldering method, including: bottom plate, as the load carrier of entire device;Support, fixedly connected on the bottom plate, the support is the frame supported by four pillars;Guide plate, symmetrically fixedly connected on the top left and right sides of the support;Mounting plate, fixedly arranged on the top rear side of the support. By front and rear multiple clamping rollers, the circuit board is rolled and clamped, then the one-way gear engages the rack, so that the servo motor drives the circuit board to lift through the third screw, which can automatically turn over when lifting, and the electric sliding rail is arranged to drive the placement plate to lift, so that the auxiliary frame plate on the placement plate can assist supporting the circuit board after turning over, and the auxiliary frame plate supports the circuit board to the highest point and then resets downward, to achieve the effect of continuous cooperation between the auxiliary frame plate and the circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field of printed circuit board manufacturing, and in particular to a circuit board silk screen solder resist flipping device and a silk screen solder resist method. Background Art

[0002] Apply a layer of green or black insulating paint on the surface of the PCB, and then use silk screen printing to print out areas that do not need to be covered with insulating paint at the parts that need to be soldered. This technology is called silk screen solder mask. The corresponding to silk screen solder mask is the "exposed pad", that is, the pad without insulating paint covering. Silk screen solder mask can reduce the risk of circuit short circuit between pads, and also prevent the circuit board from being corroded by impurities in the environment.

[0003] A search revealed a patent with the authorized publication number CN110602894B, which discloses a method for improving the efficiency of silk-screen solder mask printing on circuit boards. The method includes silk-screening solder mask ink on a PCB production board, wherein the PCB production board is divided into the following areas: a board edge area, a unit board area, and a molding line area separating the unit board areas; positioning holes are respectively provided in the board edge areas at the four corners of the PCB production board; the silk-screen solder mask printing method comprises the following steps: silk-screening solder mask ink on a first surface of the PCB production board; placing the PCB production board on a silk-screen auxiliary board with the first surface facing downward and facing the silk-screen auxiliary board; and silk-screening solder mask ink on a second surface of the PCB production board; the silk-screen auxiliary board is divided into areas corresponding to the board edge area, the unit board area, and the molding line area of ​​the PCB production board; a support block is provided on the board edge area at a triangular position of the silk-screen auxiliary board and at a position corresponding to the positioning hole; the PCB production board is allowed to stand until the solder mask ink on the first and second surfaces is dry and does not flow, and then the PCB production board is sequentially subjected to pre-baking, alignment exposure, and development processes to complete the production of the solder mask layer on the PCB production board.

[0004] The above patent designs a method for silk-screening solder mask on circuit boards. By adopting a silk-screen auxiliary plate with an adjustable support block, silk-screening can be performed on the second surface immediately after silk-screening solder mask ink on the first surface. However, before printing the solder mask layer, the auxiliary plate needs to be precisely aligned with the circuit board. This process is usually done manually, which easily affects the printing accuracy and consistency. In addition, the auxiliary plate needs to be carefully removed after printing is completed, which makes the entire production process lack continuity and leads to low production efficiency. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing double-sided circuit board in which the corresponding auxiliary plate and circuit board are manually operated to cooperate and separate with each other during the silk screen solder mask printing, making the entire process operation cumbersome and discontinuous, a circuit board silk screen solder mask flipping device and silk screen solder mask printing method are provided.

[0006] Technical solution: A circuit board silk screen solder mask flipping device and silk screen solder mask method, comprising: a base plate, serving as a load-bearing carrier of the entire device; a bracket, fixedly connected to the base plate, the bracket being a frame supported by four pillars; a guide plate, symmetrically fixed to the left and right sides of the top of the bracket; a mounting plate, fixedly arranged on the rear side of the top of the bracket; a sliding frame, slidably mounted on the front side of the mounting plate, the sliding frame being perpendicular to the mounting plate; an inkjet machine, mounted on the sliding frame, the body of the inkjet machine being perpendicular to the sliding frame; a drag chain slide module, arranged on the front side of the mounting plate, the sliding frame being connected to the drag chain slide module, the drag chain slide module driving the entire inkjet machine to move left and right through the sliding frame; a clamping assembly, the clamping assembly being used to clamp the circuit board; the clamping assembly comprising a guide frame , a clamping member, a mounting frame, a sliding block, a clamping frame, a clamping roller and a motor pulley group, the guide frame is symmetrically fixed to the front and rear sides of the base plate, the guide frame is perpendicular to the base plate, and a sliding slot is opened on the upper part of the guide frame, the clamping member is symmetrically slidably installed on the corresponding guide frame through the sliding block, the mounting frame is symmetrically installed on the corresponding end of the clamping member, the clamping frame is symmetrically installed inside the corresponding mounting frame, a plurality of clamping rollers are provided and rotatably installed inside each of the clamping frames, the motor pulley group is provided on each of the clamping frames, and the motor pulley group drives each of the clamping rollers in the clamping frames of the same group to rotate; an adjustment component is symmetrically provided on each of the guide plates, and the adjustment component adjusts the clamping distance between the clamping frames through the mounting frame.

[0007] In one embodiment, the adjustment assembly includes a cylinder, a telescopic rod and a spring. The front mounting frame is slidingly connected to the guide plate. The cylinder is symmetrically installed on the lower side of each guide plate. The cylinder is connected to the mounting frame through the telescopic rod. A spring is provided between the mounting frame and the clamping frame.

[0008] In one embodiment, a support assembly is provided on the base plate, and the support assembly includes an electric slide rail, a placement plate, a positioning plate, an auxiliary frame plate and a limiting assembly. The electric slide rail is provided on the inner side walls of the four pillars of the bracket, and the placement plate is slidably installed on the bracket through the electric slide rail. The positioning plate is provided on the surface of the placement plate, and the positioning plate is located near the top corner of the right rear side of the placement plate. The auxiliary frame plate is placed on the surface of the placement plate, and the limiting assembly cooperates with the positioning plate to limit the auxiliary frame plate, so that the auxiliary frame plate can adapt to and support the circuit board for silk screen solder mask.

[0009] In one embodiment, the auxiliary frame plate is replaceably installed on the placement plate, and elastic rubber pads are provided on the clamping surfaces of the clamping rollers.

[0010] In one embodiment, the limiting assembly includes a first motor, a first screw, a first limiting plate, a second motor, a second screw and a second limiting plate, the first motor is mounted on the surface of the base plate, the first screw is rotatably mounted on the base plate, the first screw is horizontally arranged left and right on the base plate, and the output shaft of the first motor is connected to the first screw, the first limiting plate is slidably mounted on the placement plate, the first limiting plate is threadedly connected to the first screw, and the placement plate is provided with a sliding groove adapted to the first limiting plate, the second motor is also mounted on the surface of the base plate, the second screw is rotatably mounted on the base plate, the first screw is horizontally arranged front and back on the base plate, and the output shaft of the second motor is connected to the second screw, the second limiting plate is slidably mounted on the placement plate, the second limiting plate is threadedly connected to the second screw, and the placement plate is further provided with a sliding groove adapted to the second limiting plate, the first motor and the second motor respectively drive the first limiting plate and the second limiting plate to move on the placement plate, so that the first limiting plate and the second limiting plate can adapt to the positioning plate to limit and clamp the placed auxiliary frame plate.

[0011] In one embodiment, the guide frame is provided with a flipping assembly, which includes a servo motor, a third screw, a one-way gear and a rack. The servo motor is symmetrically installed on the top of the front and rear guide frames respectively, and the third screw is rotatably installed inside each guide frame. The servo motor is connected to the third screw through a coupling, and the third screw is threadedly connected to the clamping member. The one-way gear is installed on the rotating shaft of the two clamping members, and the rack is arranged on each guide frame. The rack is used to adapt to and mesh with the one-way gear on the same side, and the number of teeth of the rack is half of the number of teeth of the one-way gear. The corresponding third screw is driven to rotate by the servo motor, so that the third screw thread drives the clamping member to rise and fall, and then the one-way gear and the rack are engaged with each other, so that the clamping member is lifted and lowered once and then flipped 180 degrees, thereby realizing automatic flipping of the circuit board for solder mask.

[0012] In one embodiment, a width measuring component is also included, and the width measuring component includes a mounting frame, a width measuring camera and a controller. The mounting frame is fixedly installed on the right side of the mounting plate. Two width measuring cameras are provided and respectively installed on the mounting frame. The two width measuring cameras measure the actual width of the circuit board. The controller is set on the guide plate on the right side. The controllers are electrically connected to the two cylinders. After the two width measuring cameras measure the width of the circuit board respectively, the measurement data is transmitted to the external terminal for processing. The processed information will be transmitted to the controller. Finally, the controller controls the telescopic rod of the cylinder to extend and retract, so that the mounting frame, clamping frame and clamping roller can better adapt to and clamp the circuit board.

[0013] A silk screen solder resist method for a circuit board silk screen solder resist flipping device comprises the following steps:

[0014] S1. Use the first motor and the second motor to respectively drive the first limiting plate and the second limiting plate to move and adjust, so as to stably limit the auxiliary frame plates of different sizes placed on the placement plate, so that the auxiliary frame plates of different sizes can better adapt to and support the circuit boards of corresponding sizes for precise flipping and lifting;

[0015] S2. Two width measurement cameras are set up to measure the width of the circuit board to be processed, and the controller is activated through the external data processing terminal, so that the controller can control the adjustment component to adjust the clamping distance between the clamping components, so that the clamping components can meet the clamping operation of circuit boards of various sizes, thereby facilitating the subsequent flipping and silk screen solder mask processing of circuit boards of different sizes;

[0016] S3. Place the circuit board that needs to be printed with silk screen and solder mask on the clamping rollers on the front and back sides for clamping. Then, through the cooperation of the one-way gear and rack, the servo motor drives the circuit board to move downward to complete the flipping work. After flipping, the auxiliary frame plate is supported on the lower surface of the flipped circuit board, so that the auxiliary frame plate can continuously cooperate with the circuit board to perform silk screen and solder mask processing after flipping.

[0017] The beneficial effects of the present invention are: 1. The circuit board is rollingly clamped by multiple clamping rollers on the front and rear sides, and then a one-way gear is engaged with the rack, so that the servo motor can automatically flip the circuit board when driving the circuit board to rise and fall through the third screw. At the same time, an electric slide rail is set to drive the placement plate to rise and fall, so that the auxiliary frame plate on the placement plate can provide auxiliary support for the flipped circuit board, and the auxiliary frame plate will reset downward after supporting the circuit board to the highest point, so as to achieve the effect of continuous cooperation between the auxiliary frame plate and the circuit board.

[0018] 2. By setting a limit assembly on the support assembly, the auxiliary frame plate can be positioned at the top angle by the positioning plate, and then the first motor and the second motor are used to drive the first screw and the second screw to rotate respectively, so that the first limit plate and the second limit plate can be clamped on the left and front sides of the auxiliary frame plate respectively, so that the placement plate can place auxiliary frame plates of different sizes, so that the auxiliary frame plate can cooperate with and support circuit boards of corresponding sizes.

[0019] 3. By setting up a width measurement component, the width of the processed circuit board is captured by a width measurement camera. The captured data is processed by an external processing terminal and then transmitted back to the controller. The controller controls the activation of the two cylinders, so that the activated cylinders drive the installation frame and the clamping frame to move through the telescopic rods, so that the clamping distance between the front and rear clamping rollers can match the width of the processed circuit board, thereby realizing silk screen solder mask printing on circuit boards of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the clamping assembly and the supporting assembly of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the inkjet machine, clamping assembly and width measuring assembly of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the clamping assembly and the adjusting assembly and other components of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6 It is a structural schematic diagram of the clamping assembly and the flipping assembly of the present invention;

[0026] Figure 7 A diagram showing the connection relationship between the clamping assembly and some components of the flip assembly of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the supporting assembly and the limiting assembly and other components of the present invention;

[0028] Figure 9 It is a structural schematic diagram of specific components of the base plate and the limiting assembly of the present invention.

[0029] Among them: 1. Base plate, 100. Circuit board, 2. Bracket, 201. Guide plate, 3. Mounting plate, 4. Sliding frame, 5. Inkjet printer, 6. Drag chain slide module, 7. Clamping assembly, 701. Guide frame, 702. Clamping piece, 703. Sliding block, 704. Mounting frame, 705. Clamping frame, 706. Clamping roller, 707. Motor pulley assembly, 8. Adjustment assembly, 801. Cylinder, 802. Telescopic rod, 803. Spring, 9. Support assembly, 901. Electric slide Rail, 902, placement plate, 903, positioning plate, 904, auxiliary frame plate, 10, limit assembly, 101, first motor, 102, first screw, 103, first limit plate, 104, second motor, 105, second screw, 106, second limit plate, 11, flip assembly, 111, servo motor, 112, third screw, 113, one-way gear, 114, rack, 12, width measuring assembly, 121, mounting bracket, 122, width measuring camera, 123, controller. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0031] Example 1: A circuit board silk screen solder mask flip device and silk screen solder mask method, such as Figure 1-Figure 5The device is shown in FIG4 , comprising: a base plate 1 as a load-bearing carrier of the entire device; a bracket 2 fixedly connected to the base plate 1, the bracket 2 being a frame supported by four pillars; a guide plate 201 symmetrically fixed to the left and right sides of the top of the bracket 2; a mounting plate 3 fixedly arranged on the rear side of the top of the bracket 2; a sliding frame 4 slidably mounted on the front side of the mounting plate 3, the sliding frame 4 being perpendicular to the mounting plate 3; an inkjet machine 5 mounted on the sliding frame 4, the body of the inkjet machine 5 being perpendicular to the sliding frame 4; a drag chain slide module 6 arranged on the front side of the mounting plate 3, the sliding frame 4 being connected to the drag chain slide module 6, the drag chain slide module 6 driving the entire inkjet machine 5 to move left and right through the sliding frame 4; a clamping assembly 7 for clamping the circuit board 100; the clamping assembly 7 comprises a guide frame 701, a clamping member 702, a mounting frame 704, a sliding block 703, a clamping frame 705, a clamping roller 706 and The motor pulley group 707, the guide frame 701 is symmetrically fixed to the front and rear sides of the base plate 1, the guide frame 701 is perpendicular to the base plate 1, and a sliding opening is opened on the upper part of the guide frame 701, the clamping member 702 is symmetrically slidably installed on the corresponding guide frame 701 through the sliding block 703, the mounting frame 704 is symmetrically mounted on the corresponding end of the clamping member 702, the clamping frame 705 is symmetrically mounted inside the corresponding mounting frame 704, a plurality of clamping rollers 706 are provided and rotatably installed inside each clamping frame 705, the motor pulley group 707 is provided on each clamping frame 705, and the motor pulley group 707 can drive each clamping roller 706 in the clamping frame 705 of the same group to rotate; the adjustment component 8 is symmetrically arranged on each guide plate 201, and the adjustment component 8 can adjust the clamping distance between the clamping frames 705 through the mounting frame 704.

[0032] like Figure 3-Figure 5 As shown, the adjustment assembly 8 includes a cylinder 801, a telescopic rod 802 and a spring 803. The front mounting frame 704 is slidably connected to the guide plate 201. The cylinder 801 is symmetrically installed on the lower side of each guide plate 201. The cylinder 801 is connected to the mounting frame 704 through the telescopic rod 802. A spring 803 is provided between the mounting frame 704 and the clamping frame 705. The cylinder 801 can adjust the interval between the two mounting frames 704 through the telescopic rod 802, so that the clamping roller 706 in the clamping frame 705 can adapt to and clamp circuit boards 100 of different sizes.

[0033] like Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown, the guide frame 701 is provided with a flip assembly 11, and the flip assembly 11 includes a servo motor 111, a third screw 112, a one-way gear 113 and a rack 114. The servo motor 111 is symmetrically mounted on the top of the front and rear guide frames 701, and the third screw 112 is rotatably mounted inside each guide frame 701. The servo motor 111 is connected to the third screw 112 through a coupling, and the third screw 112 is threadedly connected to the clamping member 702. The one-way gear 113 is mounted on the rotating shaft of the two clamping members 702. The rack 114 is arranged on each of the guide frames 701, and the rack 114 is used to adapt to and mesh with the one-way gear 113 on the same side, and the number of teeth of the rack 114 is half the number of teeth of the one-way gear 113. The corresponding third screw 112 is driven to rotate by the servo motor 111, so that the third screw 112 threadedly drives the clamping member 702 to rise and fall, and then the one-way gear 113 and the rack 114 are engaged with each other, so that the clamping member 702 is lifted once and then flipped 180 degrees, thereby realizing automatic flipping of the circuit board 100 for solder mask.

[0034] like Figure 1 and Figure 3 As shown, it also includes a width measuring component 12, which includes a mounting frame 121, a width measuring camera 122 and a controller 123. The mounting frame 121 is fixedly installed on the right side of the mounting plate 3. Two width measuring cameras 122 are provided and are respectively installed on the mounting frame 121. The two width measuring cameras 122 can measure the actual width of the circuit board 100. The controller 123 is set on the right side of the guide plate 201. The controller 123 is electrically connected to the two cylinders 801. After the two width measuring cameras 122 measure the width of the circuit board 100 respectively, the measurement data will be transmitted to the external terminal for processing. The processed information will be transmitted to the controller 123. Finally, the controller 123 controls the telescopic rod 802 of the cylinder 801 to extend and retract, so that the mounting frame 704, the clamping frame 705 and the clamping roller 706 can better adapt to and clamp the circuit board 100.

[0035] When using the circuit board 100 silk screen solder mask flipping device to silk screen solder mask on the circuit board 100, the operator first pushes the circuit board 100 to be processed horizontally to the right side of the bracket 2. At this time, the two width measuring cameras 122 will measure the width of the placed circuit board 100. The data measured by the width measuring camera 122 will be transmitted to the remote data processing terminal, and the signal processed by the data processing terminal will be returned to the controller 123. At this time, the controller 123 that receives the signal will synchronously control the cylinders 801 at two locations to work. The cylinder 801 drives the front mounting frame 704 to move through the telescopic rod 802, and the moving mounting frame 704 synchronously drives the clamping frame 705 and the clamping roller 706 to move as a whole. When the circuit board 100 is pushed between the clamping rollers 706 on the front and rear sides, the motor pulley group 707 is activated, and the motor pulley group 707 drives the multiple clamping rollers 706 at the front and rear sides to rotate synchronously, so that the placed circuit board 100 can be transported to the appropriate processing position by the multiple clamping rollers 706 on both sides. At this time, under the action of the spring 803, the clamping rollers 706 on both sides can further stably clamp the circuit board 100 that has arrived at the appropriate processing position, and then the drag chain slide module 6 is activated, and the drag chain slide module 6 will drive the inkjet machine 5 to move left and right through the sliding frame 4, so that the inkjet machine 5 can move on the circuit board The painting work is completed on one side of 100. When the other side needs to be painted, the servo motor 111 is activated. The servo motors 111 on the front and rear sides drive the corresponding third screws 112 to rotate through the coupling. The third screws 112 rotating at the front and rear sides drive the sliding blocks 703 to move down on the corresponding guide frame 701 through the thread. At this time, the downward sliding blocks 703 will synchronously drive the clamping member 702, the mounting frame 704, the clamping frame 705 and the clamping roller 706 to move downward synchronously as a whole until the downward one-way gears 113 on the front and rear sides are engaged with the corresponding racks 114, so that the one-way gears 113 drive the clamping member 702, the mounting frame 704, the clamping frame 705 and the clamping roller 706 to flip 180 degrees as a whole. In this way, the circuit board 100 clamped by the clamping rollers 706 on both sides can be automatically turned over. Similarly, when the servo motor 111 reversely drives the circuit board 100 to rise, the rising one-way gear 113 will not be able to drive the circuit board 100 to turn over after engaging the rack 114, until the servo motor 111 reversely drives the circuit board 100 to rise and reset to the painting processing plane, the drag chain slide module 6 is activated again to drive the inkjet machine 5 to paint the other side of the flipped circuit board 100. When both sides of the circuit board 100 are sprayed, the clamping roller 706 is driven by the motor pulley group 707 to directly transport the painted circuit board 100 out for subsequent silk screen solder mask processing.

[0036] Example 2: Based on Example 1, Figure 1 、 Figure 2 and Figure 6 As shown, a support assembly 9 is provided on the base plate 1, and the support assembly 9 includes an electric slide rail 901, a placement plate 902, a positioning plate 903, an auxiliary frame plate 904 and a limiting assembly 10. The electric slide rail 901 is provided on the inner side walls of the four pillars of the bracket 2, and the placement plate 902 is slidably installed on the bracket 2 through the electric slide rail 901. The positioning plate 903 is provided on the surface of the placement plate 902, and the positioning plate 903 is located near the top corner of the right rear side of the placement plate 902. The auxiliary frame plate 904 is placed on the surface of the placement plate 902. The limiting assembly 10 cooperates with the positioning plate 903 to limit the auxiliary frame plate 904, so that the auxiliary frame plate 904 can adapt to and support the circuit board 100 for silk screen solder mask; the auxiliary frame plate 904 is replaceably installed on the placement plate 902, and the clamping surface of the clamping roller 706 is provided with an elastic rubber pad.

[0037] like Figure 2 、 Figure 6 、 Figure 8 and Figure 9 As shown, the limiting assembly 10 includes a first motor 101, a first screw 102, a first limiting plate 103, a second motor 104, a second screw 105 and a second limiting plate 106. The first motor 101 is installed on the surface of the base plate 1, and the first screw 102 is rotatably installed on the base plate 1. The first screw 102 is horizontally arranged on the base plate 1, and the output shaft of the first motor 101 is connected to the first screw 102. The first limiting plate 103 is slidably installed on the placement plate 902. The first limiting plate 103 is threadedly connected to the first screw 102. The placement plate 902 is provided with a sliding groove adapted to the first limiting plate 103. The second motor 104 is also installed on the surface of the base plate 1. The second screw 105 is rotatably installed on the base plate 1, the first screw 102 is horizontally placed in the front and back of the base plate 1, and the output shaft of the second motor 104 is connected to the second screw 105, the second limit plate 106 is slidably installed on the placement plate 902, the second limit plate 106 is threadedly connected to the second screw 105, and the placement plate 902 is also provided with a sliding groove adapted to the second limit plate 106, the first motor 101 and the second motor 104 respectively drive the first limit plate 103 and the second limit plate 106 to move on the placement plate 902, so that the first limit plate 103 and the second limit plate 106 can adapt to the positioning plate 903 to limit and clamp the placed auxiliary frame plate 904.

[0038] Before silk-screening solder mask on circuit boards 100 of different sizes, the operator first selects an auxiliary frame plate 904 that matches the size of the circuit board 100 and places it on the placement plate 902. First, align one vertex of the auxiliary frame plate 904 with the positioning plate 903. Then, the first motor 101 drives the first screw 102 to rotate, so that the first screw 102 thread-drives the first limiting plate 103 to be limited to the left side of the auxiliary frame plate 904. At the same time, the second motor 104 drives the second screw 105 to rotate, so that the second screw 105 thread-drives the second limiting plate 106 to be limited to the front side of the auxiliary frame plate 904. In this way, the placed circuit board 100 is limited by the first limiting plate 103 and the second limiting plate 106, and the positioning plate 903 is cooperated to enable the circuit board 100 to be accurately positioned. On the placement plate 902, when the servo motor 111 drives the entire clamping assembly 7 to complete the flipping of the circuit board 100, the placement plate 902 is driven upward by the electric slide 901, so that the auxiliary frame plate 904 on the placement plate 902 can rise until the auxiliary frame plate 904 contacts and supports the lower surface of the circuit board 100. The servo motor 111 and the electric slide 901 cooperate with each other to enable the auxiliary frame plate 904 to be synchronously supported on the lower surface of the circuit board 100 until the circuit board 100 rises and the plane is processed. Then, the placement plate 902 and the auxiliary frame plate 904 are driven by the electric slide 901 to slide down and reset synchronously, ready to support and cooperate with the next flipped circuit board 100, thereby achieving continuous cooperation and separation between the auxiliary frame plate 904 and the circuit board 100.

[0039] A silk screen solder resist method for a silk screen solder resist flipping device for a circuit board 100, comprising the following steps:

[0040] S1. The first limiting plate 103 and the second limiting plate 106 are driven by the first motor 101 and the second motor 104 to move and adjust, respectively, to stably limit the auxiliary frame plates 904 of different sizes placed on the placement plate 902, so that the auxiliary frame plates 904 of different sizes can better adapt to and support the circuit boards 100 of corresponding sizes for precise flipping and lifting;

[0041] S2. Two width measurement cameras 122 are set to measure the width of the circuit board 100 to be processed, and the controller 123 is activated through the external data processing terminal, so that the controller 123 can control the adjustment component 8 to adjust the clamping distance between the clamping components 7, so that the clamping components 7 can meet the clamping operation of circuit boards 100 of various sizes, thereby facilitating the subsequent flipping and silk screen solder mask printing of circuit boards 100 of different sizes;

[0042] S3. The circuit board 100 to be printed with silk screen and solder mask is placed into the clamping rollers 706 on the front and rear sides for clamping. Then, the servo motor 111 drives the circuit board 100 to move downward through the cooperation of the one-way gear 113 and the rack 114 to complete the flipping work. After flipping, the auxiliary frame plate 904 supports the lower surface of the flipped circuit board 100, so that the auxiliary frame plate 904 can continuously cooperate with the circuit board 100 to perform the silk screen and solder mask processing after flipping.

[0043] While the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that numerous other embodiments can be devised which do not depart from the scope of the invention.

Claims

1. A circuit board silk screen solder mask flipping device, comprising: a base plate (1), serving as a load-bearing carrier of the entire device; a bracket (2), fixedly connected to the base plate (1), the bracket (2) being a frame supported by four pillars; a guide plate (201), symmetrically fixedly connected to the left and right sides of the top of the bracket (2); a mounting plate (3), fixedly arranged on the rear side of the top of the bracket (2); a sliding frame (4), slidably mounted on the front side of the mounting plate (3), the sliding frame (4) being perpendicular to the mounting plate (3); an inkjet machine (5), mounted on the sliding frame (4), the body of the inkjet machine (5) being perpendicular to the sliding frame (4); a drag chain slide module (6), arranged on the front side of the mounting plate (3), the sliding frame (4) being connected to the drag chain slide module (6); and characterized in that, include: A clamping assembly (7), wherein the clamping assembly (7) comprises a guide frame (701), a clamping member (702), a mounting frame (704), a sliding block (703), a clamping frame (705), a clamping roller (706) and a motor pulley assembly (707), wherein the guide frame (701) is symmetrically fixed to the front and rear sides of the base plate (1), the guide frame (701) is perpendicular to the base plate (1), and a sliding opening is provided on the upper portion of the guide frame (701), and the clamping member (702) is symmetrically slidably mounted on the corresponding guide frame (701) through the sliding block (703). The mounting frame (704) is symmetrically mounted on the end of the corresponding clamping member (702), the clamping frame (705) is symmetrically mounted inside the corresponding mounting frame (704), a plurality of clamping rollers (706) are provided and are rotatably mounted inside each clamping frame (705), the motor pulley group (707) is provided on each clamping frame (705), and the motor pulley group (707) drives each clamping roller (706) in the same group of clamping frames (705) to rotate; an adjustment component (8) is symmetrically arranged on each guide plate (201); The guide frame (701) is provided with a flip assembly (11), and the flip assembly (11) includes a servo motor (111), a third screw (112), a one-way gear (113) and a rack (114). The servo motor (111) is symmetrically mounted on the top of the guide frame (701) at the front and rear, respectively. The third screw (112) is rotatably mounted inside each guide frame (701). The servo motor (111) is connected to the guide frame (701) through a coupling. The third screw (112) is connected, the third screw (112) is threadedly connected to the clamping member (702), the one-way gear (113) is installed on the rotating shaft of the two clamping members (702), the rack (114) is set on each of the guide frames (701), the rack (114) is adapted to and meshes with the one-way gear (113) on the same side, and the number of teeth of the rack (114) is half the number of teeth of the one-way gear (113).

2. A circuit board silk screen solder mask flipping device according to claim 1, characterized in that: The adjustment assembly (8) includes a cylinder (801), a telescopic rod (802) and a spring (803); the front mounting frame (704) is slidably connected to the guide plate (201); the cylinder (801) is symmetrically mounted on the lower side of each guide plate (201); the cylinder (801) is connected to the mounting frame (704) via the telescopic rod (802); and a spring (803) is provided between the mounting frame (704) and the clamping frame (705).

3. A circuit board silk screen solder mask flipping device according to claim 2, characterized in that: A support assembly (9) is provided on the base plate (1), and the support assembly (9) includes an electric slide rail (901), a placement plate (902), a positioning plate (903), an auxiliary frame plate (904) and a limiting assembly (10). The electric slide rail (901) is provided on the inner side walls of the four pillars of the bracket (2), the placement plate (902) is slidably installed on the bracket (2) through the electric slide rail (901), the positioning plate (903) is provided on the surface of the placement plate (902), the auxiliary frame plate (904) is placed on the surface of the placement plate (902), and the limiting assembly (10) cooperates with the positioning plate (903) to limit the auxiliary frame plate (904).

4. A circuit board silk screen solder mask flipping device according to claim 3, characterized in that: The auxiliary frame plate (904) is replaceably mounted on the placement plate (902), and elastic rubber pads are provided on the clamping surfaces of the clamping rollers (706).

5. A circuit board silk screen solder mask flipping device according to claim 4, characterized in that: The limiting assembly (10) includes a first motor (101), a first screw (102), a first limiting plate (103), a second motor (104), a second screw (105) and a second limiting plate (106), wherein the first motor (101) is mounted on the surface of the base plate (1), the first screw (102) is rotatably mounted on the base plate (1), the first screw (102) is horizontally arranged on the base plate (1), and the output shaft of the first motor (101) is connected to the first screw (102), the first limiting plate (103) is slidably mounted on the placement plate (902), and the first limiting plate (103) and the first screw (102) are screwed together. The placing plate (902) is connected by a groove, and a sliding groove is provided on the placing plate (902) and is adapted to the first limiting plate (103). The second motor (104) is also installed on the surface of the base plate (1). The second screw (105) is rotatably installed on the base plate (1). The first screw (102) is horizontally arranged front and back on the base plate (1), and the output shaft of the second motor (104) is connected to the second screw (105). The second limiting plate (106) is slidably installed on the placing plate (902). The second limiting plate (106) is threadedly connected to the second screw (105). The placing plate (902) is also provided with a sliding groove adapted to the second limiting plate (106).

6. A circuit board silk screen solder mask flipping device according to claim 5, characterized in that: The invention also includes a width measuring component (12), the width measuring component (12) including a mounting frame (121), a width measuring camera (122) and a controller (123), the mounting frame (121) is fixedly mounted on the right side of the mounting plate (3), two width measuring cameras (122) are provided and respectively mounted on the mounting frame (121), the controller (123) is arranged on the right side of the guide plate (201), the controller (123) is electrically connected to the cylinders (801) at two locations, and the width measuring camera (122) is linked to the controller (123) through an external data processing terminal.

7. A method for silk screen solder resist flipping device for a circuit board, which adopts the silk screen solder resist flipping device for a circuit board as claimed in claim 6, characterized in that: The following steps are involved: S1, using a first motor (101) and a second motor (104) to respectively drive a first limiting plate (103) and a second limiting plate (106) to move and adjust, thereby stably limiting the auxiliary frame plates (904) of different sizes placed on the placement plate (902), so that the auxiliary frame plates (904) of different sizes can better adapt to and support the circuit boards (100) of corresponding sizes for accurate flipping and lifting; S2, setting two width measuring cameras (122) to measure the width of the circuit board (100) to be processed, and enabling the controller (123) through the external data processing terminal as a transfer, so that the controller (123) can control the adjustment component (8) to adjust the clamping distance between the clamping components (7), so that the clamping components (7) can meet the clamping operation of circuit boards (100) of various sizes, thereby facilitating the subsequent turning over and silk screen solder mask processing of circuit boards (100) of different sizes; S3. The circuit board (100) to be printed with silk screen solder mask is placed into the clamping rollers (706) on the front and rear sides for clamping. Then, the servo motor (111) drives the circuit board (100) to move downward through the cooperation of the one-way gear (113) and the rack (114) to complete the flipping work. After flipping, the auxiliary frame plate (904) is supported on the lower surface of the flipped circuit board (100), so that the auxiliary frame plate (904) can continuously cooperate with the circuit board (100) to perform silk screen solder mask processing after flipping.

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