Printed circuit board (PCB) printing screen scraping device

Abstract

The utility model relates to the technical field of PCB printing, in particular to a screen scraping device for PCB printing. A PCB printing screen scraping device comprises a mounting frame and the like, a point blocking screen is fixedly connected to the bottom of the mounting frame, four mounting blocks are fixedly connected to the top of the mounting frame at intervals, the PCB printing screen scraping device further comprises a lifting assembly and a cleaning assembly, the lifting assembly is arranged on the mounting frame, and the cleaning assembly used for cleaning the surface of the point blocking screen is arranged on the lifting assembly. The lifting assembly is used for driving the cleaning assembly to ascend and descend. According to the utility model, the sponge roller is driven by the motor to move after printing, and residual printing ink on the periphery of the blocking points of the blocking point net and meshes is adsorbed and cleaned, so that the blocking point net is kept clean. The problem that printing ink accumulates and enters a hole due to the fact that the screen bottom is not scraped when the point blocking screen assists in printing is effectively solved, the printing effect and the quality of finished products are prevented from being affected by the printing ink entering the hole, and high precision and high quality of PCB printing are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of PCB printing technology, and in particular to a PCB printing squeegee device. Background Technology

[0002] Printed circuit boards (PCBs) are often coated with solder resist. Many customers require that no solder resist ink should enter the double-sided windows of the PCB. When the diameter of the double-sided windows is 0.25 mm to 0.3 mm, the small size of the holes makes it difficult for the developer to rinse after printing. The solder resist ink inside the holes is easily not completely washed away, leading to blockage or residue, which affects heat dissipation and electrical performance. This is a pain point in the industry.

[0003] Using dotted screen printing can create precise dots or patterns on the PCB surface, effectively preventing ink from seeping into holes and ensuring high precision of the circuit board. Through meticulous design and material selection, it blocks ink flow and improves finished product quality. However, if the screen base is not scraped after each printing cycle, as the printing volume increases, more ink accumulates around the dots, making it easier for ink to seep into holes during subsequent printing, affecting printing quality and the final product quality. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a PCB printing squeegee device.

[0005] The technical solution of this utility model is as follows: a PCB printing screen scraping device, including a mounting frame, a blocking screen, and mounting blocks. The blocking screen is fixedly connected to the bottom of the mounting frame, and four mounting blocks are fixedly connected to the top of the mounting frame at intervals. It also includes a lifting component and a cleaning component. The lifting component is provided on the mounting frame, and the lifting component is provided with a cleaning component for cleaning the surface of the blocking screen. The lifting component is used to drive the cleaning component to move up and down.

[0006] As a preferred technical solution of this utility model, the lifting assembly includes a fixed plate, an L-shaped plate, a lifting rod, a connecting plate, and an electric push rod. Fixed plates are fixedly connected to the front and rear sides of the top of the mounting frame. Two L-shaped plates are fixedly connected to the top of the two fixed plates at intervals. Lifting rods are slidably arranged on the L-shaped plates. A connecting plate is fixedly connected between the upper ends of two adjacent lifting rods. An electric push rod is installed in the middle of the two fixed plates. The telescopic rod ends of the two electric push rods are fixedly connected to the adjacent connecting plates respectively.

[0007] As a preferred technical solution of this utility model, the cleaning component includes a mounting plate, a lead screw, a slider, a rotating shaft, a sponge roller, and a motor a. The lower end of the lifting rod is fixedly connected to the mounting plate. A lead screw is rotatably connected between two mounting plates located on the same side in the left-right direction. A slider is threaded onto each of the two lead screws. A rotating shaft is rotatably connected between the two sliders. A sponge roller is sleeved on the rotating shaft. Motor a is mounted on each of the two mounting plates located on the front side. The output shafts of the two motors a are fixedly connected to the front ends of the adjacent lead screws, respectively.

[0008] As a preferred technical solution of this utility model, it also includes a motor b, which is mounted on the slider on the right side, and the output shaft end of the motor b is fixedly connected to the right end of the rotating shaft.

[0009] As a preferred technical solution of this utility model, it also includes protrusions, and multiple protrusions are spaced apart on the surface of the sponge roller.

[0010] As a preferred technical solution of this utility model, it also includes a card plate, a card rod, and a collection frame. Two card plates are fixedly connected at intervals on the top of the fixed plate located on the front side. Card rods are fixedly connected to the side of the two card plates away from the fixed plate. A collection frame is fixedly connected between the lower ends of the two card rods.

[0011] Beneficial effects: This invention utilizes a motor-driven sponge roller to move after printing, adsorbing and cleaning residual ink around the dots and mesh openings of the dotted screen, keeping the dotted screen clean. This effectively solves the problem of ink accumulation in the openings caused by not scraping the screen bottom during dotted screen auxiliary printing, preventing ink from entering the openings and affecting printing results and finished product quality, thus ensuring high precision and high quality in PCB printing. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a three-dimensional structural diagram of the mounting frame, the blocking mesh, and the mounting block of this utility model.

[0014] Figure 3 This is a three-dimensional structural diagram of the mounting plate, lead screw, and slider of this utility model.

[0015] Figure 4 This is a three-dimensional structural diagram of the motor b, protrusion, and clamping plate of this utility model.

[0016] Wherein: 1-Mounting frame, 2-Blocking mesh, 21-Mounting block, 31-Fixing plate, 32-L-shaped plate, 33-Lifting rod, 34-Connecting plate, 35-Electric push rod, 41-Mounting plate, 42-Screw rod, 43-Slider, 44-Rotating shaft, 45-Sponge roller, 46-Motor a, 5-Motor b, 6-Protrusion, 71-Clamping plate, 72-Clamping rod, 73-Collection frame. Detailed Implementation

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0018] Example: A PCB printing squeegee device, such as Figures 1-4 As shown, it includes an installation frame 1, a baffle net 2, and installation blocks 21. The baffle net 2 is welded and fixed to the bottom of the installation frame 1, and four installation blocks 21 are welded and fixed to the top of the installation frame 1 at intervals. It also includes a lifting component and a cleaning component. The installation frame 1 is equipped with a lifting component, and the lifting component is equipped with a cleaning component for cleaning the surface of the baffle net 2. The lifting component is used to drive the cleaning component to lift and lower.

[0019] like Figure 1 As shown, the lifting assembly includes a fixed plate 31, an L-shaped plate 32, a lifting rod 33, a connecting plate 34, and an electric push rod 35. The front and rear sides of the top of the mounting frame 1 are fixed with bolts. Two L-shaped plates 32 are welded to the top of each fixed plate 31 at intervals. Lifting rods 33 are slidably arranged on each L-shaped plate 32. A connecting plate 34 is welded to the upper end of each of the two adjacent lifting rods 33. An electric push rod 35 is fixedly installed in the middle of each of the two fixed plates 31. The telescopic rod ends of the two electric push rods 35 are respectively fixedly connected to the adjacent connecting plates 34.

[0020] like Figure 1 and Figure 3 As shown, the cleaning assembly includes a mounting plate 41, a lead screw 42, a slider 43, a rotating shaft 44, a sponge roller 45, and a motor a46. The lower end of the lifting rod 33 is welded and fixed with a mounting plate 41. A lead screw 42 is rotatably connected between two mounting plates 41 located on the same side in the left-right direction. A slider 43 is threaded onto each of the two lead screws 42. A rotating shaft 44 is rotatably connected between the two sliders 43. A sponge roller 45 is fixedly sleeved on the rotating shaft 44. A motor a46 is installed on each of the two mounting plates 41 located on the front side. The output shafts of the two motors a46 are fixedly connected to the front ends of the adjacent lead screws 42, respectively.

[0021] In use, the operator installs the mounting frame 1 onto the lifting device of the PCB printing equipment via the mounting block 21. Initially, the telescopic rods of the two electric push rods 35 are extended, and the bottom height of the collection frame 73 is the same as the bottom height of the mounting frame 1. When a PCB board is conveyed by the conveyor to the bottom of the blocking screen 2, the operator activates the lifting device of the printing equipment to make the blocking screen 2 fit against the PCB surface. Then, the printing equipment is started to brush ink onto the PCB surface. Since the bottom height of the collection frame 73 is the same as the bottom height of the mounting frame 1, the collection frame 73 will not collide with the conveyor. After printing, the lifting device drives the mounting frame 1 to return to its original position. At this time, the two motors a46 start, driving the two lead screws 42 to rotate, which in turn drives the two sliders 43 to move backward, thereby driving the rotating shaft 44 and the sponge roller 45 to move backward. When the sponge roller 45 moves, it scrapes the surface of the blocking screen 2, thereby absorbing and cleaning the ink remaining around the blocking points and in the mesh of the blocking screen 2. This ensures that the blocking screen 2 remains clean for the next printing and will not affect the next printing.

[0022] like Figure 4 As shown, it also includes a motor b5, which is mounted on the slider 43 on the right side. The output shaft end of the motor b5 is fixedly connected to the right end of the rotating shaft 44.

[0023] By setting motor b5, when the sponge roller 45 moves to clean the surface of the blocking net 2, the motor b5 starts, thereby driving the sponge roller 45 to rotate through the rotating shaft 44, thus achieving a better cleaning effect.

[0024] like Figure 4 As shown, it also includes bumps 6, and multiple bumps 6 are spaced out on the surface of the sponge roller 45.

[0025] By setting the protrusion 6, when the sponge roller 45 rotates, the protrusion 6 can extend into the mesh of the blocking net 2, thereby further improving the cleaning effect.

[0026] like Figure 4 As shown, it also includes a card plate 71, a card rod 72 and a collection frame 73. Two card plates 71 are welded and fixed at intervals on the top of the fixing plate 31 located on the front side. Card rods 72 are fixed and clamped on the side of the two card plates 71 away from the fixing plate 31. A collection frame 73 is welded and fixed between the lower ends of the two card rods 72.

[0027] By setting up the clamping plate 71, clamping rod 72, and collecting frame 73, after the sponge roller 45 finishes cleaning and resetting the blocking point mesh 2, the collecting frame 73 can collect the ink dripping from the sponge roller 45, preventing ink from dripping onto the conveying device. The ink in the collecting frame 73 can be processed simply by removing the clamping rod 72 from the clamping plate 71.

[0028] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A PCB printing screen scraping device, comprising a mounting frame (1), a blocking screen (2), and mounting blocks (21), wherein the blocking screen (2) is fixedly connected to the bottom of the mounting frame (1), and four mounting blocks (21) are fixedly connected to the top of the mounting frame (1) at intervals, characterized in that: It also includes a lifting component and a cleaning component. The lifting component is provided on the mounting frame (1), and the lifting component is provided with a cleaning component for cleaning the surface of the blocking net (2). The lifting component is used to drive the cleaning component to lift.

2. A PCB printing doctor blade device as claimed in claim 1, wherein: The lifting assembly includes a fixed plate (31), an L-shaped plate (32), a lifting rod (33), a connecting plate (34), and an electric push rod (35). Fixed plates (31) are fixedly connected to the front and rear sides of the top of the mounting frame (1). Two L-shaped plates (32) are fixedly connected to the top of the two fixed plates (31) at intervals. Lifting rods (33) are slidably arranged on the L-shaped plates (32). A connecting plate (34) is fixedly connected between the upper ends of two adjacent lifting rods (33). An electric push rod (35) is installed in the middle of the two fixed plates (31). The telescopic rod ends of the two electric push rods (35) are fixedly connected to the adjacent connecting plates (34).

3. A PCB printing doctor blade device as claimed in claim 2, wherein: The cleaning assembly includes a mounting plate (41), a lead screw (42), a slider (43), a rotating shaft (44), a sponge roller (45), and a motor a (46). The lower end of the lifting rod (33) is fixedly connected to the mounting plate (41). The two mounting plates (41) located on the same side in the left-right direction are rotatably connected to the lead screw (42). The two lead screws (42) are threadedly connected to the sliders (43). The two sliders (43) are rotatably connected to the rotating shaft (44). The sponge roller (45) is sleeved on the rotating shaft (44). The two mounting plates (41) located on the front side are each equipped with a motor a (46). The output shafts of the two motors a (46) are fixedly connected to the front end of the adjacent lead screws (42).

4. The PCB printing squeegee device as described in claim 3, characterized in that: It also includes a motor b (5), which is mounted on the slider (43) on the right side. The output shaft end of the motor b (5) is fixedly connected to the right end of the rotating shaft (44).

5. A PCB printing doctor blade device as claimed in claim 4, wherein: It also includes bumps (6), and the surface of the sponge roller (45) is provided with multiple bumps (6) at intervals.

6. A PCB printing doctor blade device as claimed in claim 5, wherein: It also includes a card plate (71), a card rod (72) and a collection frame (73). The top of the fixed plate (31) on the front side is fixedly connected with two card plates (71) at intervals. The card rod (72) is fixedly connected to the side of the two card plates (71) away from the fixed plate (31). The collection frame (73) is fixedly connected between the lower ends of the two card rods (72).

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