A vertical screen printer for facilitating processing of PCBs

Abstract

The utility model relates to PCB board processing equipment technical field discloses a vertical silk screen printing machine convenient to processing PCB board, including positioning assembly, fixed component and second connecting rod, positioning assembly includes fixed slide column and movable sliding block, fixed component includes the connecting column fixed on the base, still include one end with the synchronous movement of sliding block second connecting rod, is equipped with recess on the pole, and the connecting column sliding is contained in recess. The utility model through the sliding fit of connecting column and recess, has provided the second heavy direction constraint except slide column for the sliding block of movement, has formed double direction guiding structure, effectively solved the problem that the existing positioning mechanism is insufficient because single guide rail movement stability, is easy to sway, improved positioning stability and accuracy significantly.

Description

Technical Field

[0001] This utility model relates to the field of PCB board processing equipment technology, and in particular to a vertical screen printing machine that facilitates the processing of PCB boards. Background Technology

[0002] Vertical screen printing machines are key equipment in the printed circuit board (PCB) production process. Their main function is to accurately print characters, component outlines, and other marking information onto the surface of the PCB board using screen printing. The quality of the screen printing directly affects the accuracy of subsequent component placement and the final product quality. Therefore, the positioning accuracy during the screen printing process is a core indicator for evaluating the performance of a screen printing machine.

[0003] To achieve automated positioning of PCB boards, existing technologies commonly employ a positioning mechanism driven by a power element. This positioning mechanism typically includes a slider that moves along a fixed guide rail, with a positioning plate connected to the slider for abutting and clamping the PCB board. When the power element drives the slider to move, the positioning plate moves accordingly, thereby pushing the PCB board to the preset printing position.

[0004] However, in actual operation, the stability of the aforementioned positioning mechanism has inherent shortcomings. Due to the unavoidable tolerances in machining and assembly, a small sliding gap must be maintained between the slider and the guide rail. During high-speed movement or frequent start-stop operations of the positioning mechanism, this gap can easily cause the slider to experience slight wobbling or tilting outside the main direction of movement along the guide rail. This unstable motion trajectory is directly transmitted to the positioning plate, ultimately causing positioning errors on the PCB board. Even if this error is very small, it is enough to cause the silkscreen pattern to shift from the pads and circuits on the board, resulting in product defects.

[0005] Therefore, a vertical screen printing machine that is easy to process PCB boards is proposed to solve the above problems. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a vertical screen printing machine that facilitates the processing of PCB boards, aiming to improve the problem of insufficient stability of the PCB board positioning mechanism in the prior art during movement, which easily causes shaking and affects the positioning accuracy.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a vertical screen printing machine for facilitating PCB board processing, comprising: a positioning assembly; the positioning assembly includes a third fixing plate, a slide column fixed to the third fixing plate, a slider slidably engaged with the slide column, a first fixing block fixedly connected to the slider, a first fixing plate fixedly connected to the first fixing block, a first connecting rod, and a first hydraulic cylinder fixed to the third fixing plate and used to drive the slider to move; and a fixing component and a second connecting rod.

[0008] The fixing component includes a second fixing block fixed to the third fixing plate, and a connecting post is fixed on the second fixing block.

[0009] Furthermore, one end of the second connecting rod is fixedly connected to the first fixing plate of the positioning assembly, and the second connecting rod is provided with a groove extending along its length direction, and the connecting post of the fixing assembly is slidably accommodated in the groove of the second connecting rod.

[0010] Preferably, the fixing component further includes a third fixing block, which is fixed inside the second fixing block, and the connecting column is fixed to the inner wall of the third fixing block.

[0011] Preferably, one end of the first connecting rod is rotatably connected to the piston rod of the first hydraulic cylinder, and the other end is rotatably connected to the slider.

[0012] Preferably, the vertical screen printing machine for facilitating PCB board processing further includes a chassis, and the third fixing plate of the positioning component is mounted on the chassis.

[0013] Preferably, the vertical screen printing machine for facilitating PCB board processing further includes an ink plate, a squeegee, and a second hydraulic cylinder; both the ink plate and the second hydraulic cylinder are installed inside the machine housing, and the second hydraulic cylinder drives the squeegee to move on the ink plate.

[0014] Preferably, the scraper is located above the ink plate, the second hydraulic cylinder is fixed to the top of the casing, and the piston rod of the second hydraulic cylinder is connected to the scraper.

[0015] Preferably, the vertical screen printing machine for facilitating PCB board processing further includes a motor and a belt, the motor and the belt being installed inside the machine housing, the motor driving the belt to move in order to transport the PCB board.

[0016] Preferably, the end point of the conveying path of the belt is located directly below the ink plate.

[0017] This utility model has the following beneficial effects: 1. In this utility model, the sliding fit of the connecting column solves the problem that the positioning mechanism in the prior art relies on a single sliding column for guidance, which is prone to shaking due to gaps or uneven force during movement, resulting in insufficient positioning accuracy. It achieves the technical effect of dual guidance and coordinated stability, which greatly improves the stability and accuracy of PCB board positioning, thereby ensuring the quality of subsequent silkscreen printing.

[0018] 2. In this utility model, by integrating the precision positioning mechanism, the belt conveyor mechanism and the hydraulically driven screen printing mechanism into one unit, the problem of low production efficiency and poor product consistency caused by the dispersed processes and the need for multiple manual transfers and alignments in traditional screen printing processing is solved. The technical effect of process automation and process continuity is achieved, which significantly improves the processing efficiency of PCB boards and reduces labor costs. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a vertical screen printing machine for facilitating PCB board processing, as proposed in this utility model. Figure 2 This is a schematic diagram of the first hydraulic cylinder part of a vertical screen printing machine for facilitating PCB board processing, as proposed in this utility model. Figure 3 This is a schematic diagram of the first fixing block of a vertical screen printing machine for facilitating PCB board processing, as proposed in this utility model. Figure 4 This is a schematic diagram of the connecting column structure of a vertical screen printing machine that facilitates PCB board processing, as proposed in this utility model.

[0020] Legend: 1. Positioning assembly; 101. First hydraulic cylinder; 102. First connecting rod; 103. Slider; 104. Sliding column; 105. First fixing block; 106. First fixing plate; 107. Second fixing plate; 108. Third fixing plate; 2. Fixing assembly; 201. Second fixing block; 202. Third fixing block; 203. Connecting column; 204. Second connecting rod; 3. Motor; 4. Belt; 5. Housing; 6. Second hydraulic cylinder; 7. Scraper; 8. Ink plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 4 As shown, the vertical screen printing machine for facilitating PCB board processing includes a chassis 5, a positioning component 1 mounted on the chassis 5, and a fixing component 2. The positioning component 1 is used to position and clamp the PCB board, and the fixing component 2 is used to provide auxiliary support and guidance during the operation of the positioning component 1 to improve the stability of positioning.

[0023] The positioning component 1 includes a third fixing plate 108, which is mounted on the chassis 5 as the mounting base for the entire positioning component 1 and the fixing component 2. The positioning component 1 also includes a sliding column 104 fixed on the third fixing plate 108 and a slider 103 slidably engaged with the sliding column 104. A first fixing block 105 is fixedly connected to the slider 103, and a first fixing plate 106 is fixedly connected to the first fixing block 105. The power source of the positioning component 1 is a first hydraulic cylinder 101, which is fixed on the third fixing plate 108 by a second fixing plate 107. The first hydraulic cylinder 101 is connected to the slider 103 by a first connecting rod 102 and is used to drive the slider 103 to reciprocate along the axial direction of the sliding column 104. The movement of the slider 103 will synchronously drive the first fixing block 105 and the first fixing plate 106 to move, thereby realizing the positioning operation of the PCB board.

[0024] The fixing assembly 2 includes a second fixing block 201 fixed to the third fixing plate 108, and a connecting post 203 fixed on the second fixing block 201. More specifically, the fixing assembly 2 also includes a third fixing block 202, which is fixed inside the second fixing block 201, and the connecting post 203 is fixed to the inner wall of the third fixing block 202. The vertical screen printing machine also includes a second connecting rod 204, one end of which is fixedly connected to the first fixing block 105 of the positioning assembly 1. The second connecting rod 204 has a section extending along its length. The extended groove allows the fixed connecting post 203 to be slidably accommodated within the groove of the second connecting rod 204. When the first fixed block 105 moves, the second connecting rod 204, which is fixed to it, moves synchronously. At this time, the stationary connecting post 203 forms a sliding fit within the groove of the moving second connecting rod 204. This design provides the moving first fixed block 105 with a second guiding constraint in addition to the sliding post 104, effectively suppressing deflection and vibration during the movement, thereby significantly improving the stability and accuracy of the positioning of the first fixed plate 106.

[0025] One end of the first connecting rod 102 is rotatably connected to the piston rod of the first hydraulic cylinder 101, and the other end of the first connecting rod 102 is rotatably connected to the slider 103. When the piston rod of the first hydraulic cylinder 101 extends or retracts, the slider 103 is pushed or pulled by the first connecting rod 102, and the slider 103 performs precise linear reciprocating motion along the axis of the sliding column 104.

[0026] The second fixing block 201 in the fixing assembly 2 is fixed to the third fixing plate 108 by bolts, ensuring that the reference position of the connecting column 203 is stable and unchanged. The second connecting rod 204 has a groove extending along its length. One end of the second connecting rod 204 is fixedly connected to the first fixing block 105 by welding or integral molding. When the first hydraulic cylinder 101 drives the slider 103 to move, the first fixing block 105 and the second connecting rod 204 move synchronously as a whole. At this time, the fixed connecting column 203 slides inside the groove of the second connecting rod 204. This sliding fit provides a very stable lateral support and guide for the moving first fixing block 105, ensuring that the first fixing plate 106 maintains a stable posture throughout the entire stroke of positioning and clamping the PCB board, and will not deflect or shake due to gaps or uneven force.

[0027] The second fixing block 201 also has a third fixing block 202 fixed inside, and the connecting column 203 is firmly fixed to the inner wall of the third fixing block 202. Through this layer-by-layer fixing method, the connecting column 203, which serves as a guide reference, is guaranteed to have extremely high positional stability and structural strength.

[0028] In a preferred embodiment, in order to ensure that the power of the first hydraulic cylinder 101 can be stably and efficiently transmitted to the slider 103, one end of the first connecting rod 102 is rotatably connected to the piston rod of the first hydraulic cylinder 101 through a pin, and the other end is rotatably connected to the connecting lug of the slider 103. This rotatable connection method can adapt to the small changes in the movement trajectory of the piston rod and the slider 103, reduce transmission stress, and extend service life.

[0029] In a preferred embodiment, the third fixing plate 108 of the entire positioning component 1 and the second fixing block 201 of the fixing component 2 are all firmly installed on the internal structure of the chassis 5 by means of bolts or welding. The chassis 5, as the overall load-bearing body of the equipment, provides the installation reference and external protection for all internal components.

[0030] In a preferred embodiment, the vertical screen printing machine also includes a complete screen printing mechanism, comprising an ink plate 8, a squeegee 7, and a second hydraulic cylinder 6, all of which are installed inside the machine housing 5. Specifically, the ink plate 8 is located at the PCB printing station inside the machine housing 5, the squeegee 7 is located above the ink plate 8, and the second hydraulic cylinder 6, as the driving device for the squeegee 7, is fixed to the top of the machine housing 5. The piston rod of the second hydraulic cylinder 6 is firmly connected to the back of the squeegee 7. When the second hydraulic cylinder 6 extends or retracts, it drives the squeegee 7 to reciprocate on the surface of the ink plate 8, thereby uniformly printing the ink from the ink plate 8 onto the PCB board.

[0031] In a preferred embodiment, the vertical screen printing machine is also equipped with a PCB board conveying system, including a motor 3 and a belt 4, which are also installed inside the housing 5. The motor 3 drives the belt 4 to perform cyclical motion to convey the positioned PCB board from the positioning area to the printing station. To ensure that the PCB board can enter the printing area accurately, the end point of the conveying path of the belt 4 is precisely located directly below the ink plate 8. After the PCB board reaches this position, the ink plate 8 can descend onto the PCB board, awaiting the printing operation of the squeegee 7.

[0032] Working principle: When screen printing is required on a PCB board, the motor 3 drives the belt 4 to transport the PCB board to be processed to the positioning station. Then, the first hydraulic cylinder 101 of the positioning component 1 is activated. The piston rod of the first hydraulic cylinder 101 retracts and pulls the slider 103 through the first connecting rod 102. The slider 103 slides smoothly and linearly along the fixed sliding column 104. Since the first fixed block 105 is fixedly connected to the slider 103 and the first fixed plate 106 is fixedly connected to the first fixed block 105, the movement of the slider 103 will drive the first fixed plate 106 to accurately position and clamp the PCB board. During the entire positioning movement of the first fixed plate 106, as the first fixed block 105 moves, the second connecting rod 204, which is fixedly connected to it, also moves linearly as a whole. The connecting post 203, which is fixed on the third fixed plate 108, forms a precise sliding fit in the groove of the second connecting rod 204. Since the position of the connecting post 203 is absolutely fixed, this cooperative guiding effect of the connecting post 203 and the groove on the second connecting rod 204 provides a second layer of stable constraint for the moving first fixed block 105 in addition to the sliding post 104. It effectively resists the lateral force that may be generated during the movement, prevents the first fixed block 105 from deflecting or shaking, and thus ensures the positioning accuracy of the first fixed plate 106. After the PCB board is precisely positioned and clamped, the motor 3 starts again, driving the belt 4 to transport the PCB board to the printing station inside the machine 5 and stop directly below the ink plate 8. Then the ink plate 8 descends and covers the PCB board. The second hydraulic cylinder 6 starts, and the piston rod of the second hydraulic cylinder 6 extends, driving the squeegee 7 to move smoothly on the surface of the ink plate 8, pressing the ink through the pattern on the ink plate 8 onto the PCB board, completing the entire screen printing operation.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vertical screen printing machine for easy processing of PCB boards, comprising: Positioning component (1), the positioning component (1) includes: Third fixing plate (108); A sliding column (104) is fixed to the third fixing plate (108). Slider (103), which is slidably engaged with the slide column (104); The first fixing block (105) is fixedly connected to the slider (103); The first fixing plate (106) is fixedly connected to the first fixing block (105); First connecting rod (102); A first hydraulic cylinder (101) is fixed to the third fixed plate (108) via a second fixed plate (107), and the first hydraulic cylinder (101) is connected to the slider (103) via the first connecting rod (102) to drive the slider (103) to move; Its features are, The vertical screen printing machine also includes a fixing component (2), which includes a second fixing block (201) fixed to the third fixing plate (108). A connecting post (203) is fixed on the second fixing block (201); The vertical screen printing machine also includes a second connecting rod (204), one end of which is fixedly connected to the first fixing plate (106), and the second connecting rod (204) is provided with a groove extending along its length. The connecting post (203) is slidably accommodated in the groove of the second connecting rod (204).

2. The vertical screen printing machine for facilitating PCB board processing according to claim 1, characterized in that, The fixing component (2) further includes a third fixing block (202), which is fixed inside the second fixing block (201), and the connecting column (203) is fixed to the inner wall of the third fixing block (202).

3. The vertical screen printing machine for facilitating PCB board processing according to claim 1, characterized in that, One end of the first connecting rod (102) is rotatably connected to the piston rod of the first hydraulic cylinder (101), and the other end is rotatably connected to the slider (103).

4. A vertical screen printing machine for facilitating PCB board processing according to claim 1, characterized in that, It also includes a chassis (5), on which the third fixing plate (108) is mounted.

5. A vertical screen printing machine for facilitating PCB board processing according to claim 4, characterized in that, It also includes an ink plate (8), a scraper (7), and a second hydraulic cylinder (6); the ink plate (8) and the second hydraulic cylinder (6) are both installed inside the housing (5), and the second hydraulic cylinder (6) drives the scraper (7) to move on the ink plate (8).

6. A vertical screen printing machine for facilitating PCB board processing according to claim 5, characterized in that, The scraper (7) is located above the ink plate (8), the second hydraulic cylinder (6) is fixed to the top of the housing (5), and the piston rod of the second hydraulic cylinder (6) is connected to the scraper (7).

7. A vertical screen printing machine for facilitating PCB board processing according to claim 6, characterized in that, It also includes a motor (3) and a belt (4), which are installed inside the chassis (5). The motor (3) drives the belt (4) to move to transport the PCB board.

8. A vertical screen printing machine for facilitating PCB board processing according to claim 7, characterized in that, The end point of the conveying path of the belt (4) is located directly below the ink plate (8).

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