Keycap screen printing device capable of continuously feeding and discharging

Abstract

The utility model discloses a keycap screen printing device capable of continuously feeding and discharging, which belongs to the technical field of printing equipment and comprises a worktable, and a feeding and discharging component for continuously feeding and discharging is mounted on the worktable. The feeding and discharging assembly comprises a rotating device and a feeding and discharging device. The workbench is connected with the rotating device and the feeding and discharging device. An ash cleaning assembly for cleaning impurities is mounted on the workbench; a screen printing assembly used for printing is installed on the workbench. By means of the mode, continuous synchronous feeding, discharging and conveying of the keyboards are conducted by automatically clamping the two keyboards, the continuity and the working efficiency of the device are improved, impurities and dust on the surfaces of the keyboards are cleaned up, and the situation that the impurities and dust adsorbed to the surfaces of the keyboards affect subsequent printing, and consequently printing paint cannot be adsorbed to the keyboards is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a key cap screen printing device capable of continuously loading and unloading materials. Background Art

[0002] The printing technology of the keycaps is usually silk screen printing, in which the text to be printed on the keycaps is made into a printing plate, and then the text and pattern on the printing plate is printed on the keycaps by a silk screen printing machine to complete the printing of the keycaps.

[0003] For example, Chinese utility model patent CN218477268U discloses a printing device, in which a transfer assembly is arranged on the surface of a screen printer, a printing plate is fixedly connected to the surface of the transfer assembly, and a printing plate is arranged on one side of the transfer assembly close to the printing plate.

[0004] However, it still has the following disadvantages: after one printing is completed, the material needs to be taken out of the device and a new keycap needs to be replaced, resulting in low continuity of the device operation.

[0005] Based on this, the utility model designs a keycap screen printing device capable of continuous loading and unloading to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a keycap screen printing device capable of continuous loading and unloading.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A keycap screen printing device capable of continuous loading and unloading, comprising a workbench, on which a loading and unloading assembly for continuous loading and unloading is installed;

[0009] The loading and unloading assembly comprises a rotating device and a loading and unloading device, and the workbench is connected with the rotating device and the loading and unloading device;

[0010] A dust removal component for removing impurities is installed on the workbench;

[0011] A silk screen printing assembly for printing is installed on the workbench.

[0012] Furthermore, the rotating device includes a turntable, a limit plate, a give way groove, a limit groove, a keyboard and a motor 1. The motor 1 is fixedly connected to the top of the workbench, the output end of the motor 1 passes through the workbench and is fixedly connected to the turntable, the upper end of the turntable is fixedly connected to the limit plate at equal intervals, the limit plate is provided with a limit groove, the middle part of the limit plate is provided with a give way groove, the give way groove is connected to the limit groove, and the keyboard is contacted and connected in the limit groove.

[0013] Furthermore, the loading and unloading device includes a support block, a guide rail cylinder, a support plate, a connecting rod, a cylinder and a pneumatic clamp. A support block is fixedly connected to the right side of the upper end of the workbench, a guide rail cylinder is fixedly connected to the left end of the support block, a slide is slidably connected to the left end of the guide rail cylinder, a support plate is respectively fixedly connected to the output end of the guide rail cylinder and the left end of the slide, a connecting rod is fixedly connected to the opposite end of the support plate, the upper end of the support plate is fixedly connected to the cylinder, and the output end of the cylinder is fixedly connected to the pneumatic clamp through the support plate.

[0014] Furthermore, the limiting groove is an inverted trapezoidal groove with a larger upper end and a smaller lower end.

[0015] Furthermore, the dust cleaning component includes support block 2, motor 2, support block, limit rod, threaded rod, guide groove, slide groove 1, support column 1, fixed plate and cleaning roller. Support block 2 is fixedly connected to the rear side of the upper end of the workbench, a pair of limit rods are fixedly connected in support block 2, the left end of support block 2 is fixedly connected to motor 2, threaded rod is rotatably connected in support block 2, threaded rod is located in the middle of the pair of limit rods, the output end of motor 2 passes through support block 2 and is fixedly connected to the threaded rod, the outer wall of the threaded rod is threadedly connected to the support block, the upper and lower ends of the support block are slidably connected to the outer wall of the limit rod, a guide groove is provided at the front end of the support block, slide groove 1 is provided at the front end of the support block, support column 1 is slidably connected in slide groove 1, support column 1 is slidably connected in the guide groove, the front end of support column 1 passes through the guide groove and is fixedly connected to a pair of fixed plates, and the cleaning roller is rotatably connected to the opposite end of the fixed plate.

[0016] Furthermore, the silk-screen printing assembly includes a lifting device and a printing device, the workbench is connected to the lifting device, and the lifting device is connected to the printing device.

[0017] Furthermore, the lifting device includes support block three, cylinder two, slide groove two, slide groove two, support plate two and support column two. Support block three is fixedly connected to the left side of the upper end of the workbench, a pair of slide grooves two are opened at the right end of support block three, cylinder two is fixedly connected to the bottom of support block three, support plate two is fixedly connected to the output end of cylinder two, a pair of support column two is fixedly connected to the front and rear sides of the right end of support plate two, support column two is slidably connected in slide groove two, and support column two is connected to the printing device.

[0018] Furthermore, the printing device includes guide cylinder two, support plate three, cylinder three, U-shaped connecting rod, scraper, printing brush, support frame and silk screen plate, the right end of support plate two is fixedly connected to guide cylinder two, the output end of guide cylinder two is fixedly connected to support plate three, the upper end of support plate three is fixedly connected to a pair of cylinder three, the output ends of cylinder three are fixedly connected to U-shaped connecting rods, the lower end of the front end U-shaped connecting rod passes through support plate three and is fixedly connected to the scraper, the lower end of the rear end U-shaped connecting rod passes through support plate three and is fixedly connected to the printing brush, the front and rear sides of the right end of guide cylinder two are fixedly connected to the support frame, the opposite end of the support frame is fixedly connected to the silk screen plate, and the upper end of the silk screen plate is in contact with the scraper and the printing brush.

[0019] The utility model has the following technical effects:

[0020] When the keyboard is moved to a suitable position, the pneumatic clamping claw is driven downward by the power of the cylinder 1 to grab the keyboard on the feeding track, and the keyboard in the limit slot is grabbed synchronously by the pneumatic clamping claw along the give way slot provided on the limit plate of the rotating device. After clamping, the support plate 1 is driven forward by the guide cylinder 1. At this time, the motor 1 is started to drive the turntable and the limit plate to rotate to transport the empty limit plate to the bottom of the support plate 1. At this time, the unprinted keyboard is put into the limit slot by the cylinder 1, and the printed keyboard is put on the feeding track for transportation. The keyboard is continuously loaded and unloaded and transported synchronously by automatically clamping the two keyboards, thereby improving the continuity and working efficiency of the device.

[0021] 2. The utility model provides power through the motor 2 on the support block 2 to drive the threaded rod to rotate, and the rotation of the threaded rod drives the support block to move on the outer wall of the limit rod, and the movement of the support block drives the slide groove 1 to move, and the slide groove 1 compresses the support column 1 to slide in the guide groove, and at the same time, the pressure of the guide groove drives the support column 1 to move up and down in the slide groove 1, and the movement of the support column 1 drives the fixed plate to move, and the movement of the fixed plate drives the cleaning roller to contact the keyboard. At this time, the fixed plate and the cleaning roller are driven to move right through the support column 1, and the cleaning roller rotates while moving right to remove impurities on the keyboard. By cleaning the impurities and dust on the surface of the keyboard, it is prevented that the impurities and dust adsorbed on the surface affect the subsequent printing, resulting in the printed paint being unable to be adsorbed on the keyboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The utility model is a three-dimensional keycap screen printing device capable of continuous loading and unloading. Figure 1 ;

[0024] Figure 2 This is a front view of a keycap screen printing device capable of continuous loading and unloading according to the utility model;

[0025] Figure 3 It is a left view of a keycap screen printing device capable of continuous loading and unloading according to the utility model;

[0026] Figure 4 The utility model is a three-dimensional keycap screen printing device capable of continuous loading and unloading. Figure 2 ;

[0027] Figure 5 For along Figure 2 AA direction cross-sectional view;

[0028] Figure 6 For along Figure 3 BB direction cross-sectional view;

[0029] Figure 7 for Figure 4 Enlarged view of point C in the middle;

[0030] Figure 8 for Figure 5 The enlarged view of point D in the middle;

[0031] Fig. 9 for Figure 6 Enlarged view of point E in the middle.

[0032] The numbers in the figure represent:

[0033] 1. Workbench; 2. Loading and unloading assembly; 21. Rotating device; 22. Loading and unloading device; 211. Turntable; 212. Limiting plate; 213. Giving slot; 214. Limiting slot; 215. Keyboard; 216. Motor 1; 221. Support block 1; 222. Guide cylinder 1; 223. Support plate 1; 224. Connecting rod; 225. Cylinder 1; 226. Pneumatic gripper; 227. Slide plate; 3. Dust removal assembly; 31. Support block 2; 32. Motor 2; 33. Support block; 34. Limiting rod; 35. Threaded rod; 36, guide groove; 37, slide groove one; 38, support column one; 39, fixed plate; 30, cleaning roller; 4, silk screen assembly; 41, lifting device; 42, printing device; 411, support block three; 412, cylinder two; 413, slide groove two; 414, support plate two; 415, support column two; 421, guide cylinder two; 422, support plate three; 423, cylinder three; 424, U-shaped connecting rod; 425, scraper; 426, printing brush; 427, support frame; 428, silk screen plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The utility model is further described below in conjunction with embodiments.

[0036] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0037] Example 1

[0038] Please refer to the instruction manual Figure 1-9 , a keycap screen printing device capable of continuous loading and unloading, comprising a workbench 1;

[0039] The workbench 1 is provided with a loading and unloading assembly 2 for continuous loading and unloading of materials;

[0040] The loading and unloading assembly 2 includes a rotating device 21 and a loading and unloading device 22, and the workbench 1 is connected to the rotating device 21 and the loading and unloading device 22;

[0041] The rotating device 21 includes a turntable 211, a limit plate 212, a clearance groove 213, a limit groove 214, a keyboard 215 and a motor 216. The top of the workbench 1 is fixedly connected to the motor 216. The output end of the motor 216 passes through the workbench 1 and is fixedly connected to the turntable 211. The upper end of the turntable 211 is fixedly connected to the limit plate 212 at equal intervals. The limit plate 212 is provided with a clearance groove 213. The clearance groove 213 is connected to the limit groove 214. The keyboard 215 is contacted and connected in the limit groove 214.

[0042] The loading and unloading device 22 includes a support block 221, a guide cylinder 222, a support plate 223, a connecting rod 224, a cylinder 225 and a pneumatic clamp 226. The right side of the upper end of the workbench 1 is fixedly connected to a support block 221, the left end of the support block 221 is fixedly connected to a guide cylinder 222, the left end of the guide cylinder 222 is slidably connected to a slide plate 227, the output end of the guide cylinder 222 and the left end of the slide plate 227 are respectively fixedly connected to a support plate 223, the opposite end of the support plate 223 is fixedly connected to a connecting rod 224, the upper ends of the support plates 223 are fixedly connected to cylinders 225, and the output end of the cylinder 225 is fixedly connected to a pneumatic clamp 226 through the support plate 223;

[0043] Preferably, the limiting groove 214 is an inverted trapezoidal groove with a larger upper end and a smaller lower end;

[0044] The inverted trapezoidal groove can facilitate the keyboard 215 to enter therein and limit its position at the same time.

[0045] In the embodiment of the utility model, when the device starts to grab the material, the guide cylinder 222 on the support block 221 of the upper and lower material device 22 of the upper and lower material assembly 2 provides power to drive the support plate 223 at the rear end to move, and the support plate 223 at the rear end drives the support plate 223 and the slide plate 227 at the front end to move on the guide cylinder 222 through the connecting rod 224. When it moves to the appropriate position, the cylinder 225 provides power to drive the pneumatic clamp 226 to move down to grab the keyboard 215 on the feeding track, and at the same time, the pneumatic clamp 226 is opened along the limit plate 212 of the rotating device 21. The yield groove 213 synchronously grabs the keyboard 215 in the limit groove 214, and after clamping, the guide cylinder 222 drives the support plate 223 to move forward. At this time, the motor 216 starts to drive the turntable 211 and the limit plate 212 to rotate and transport the empty limit plate 212 to the bottom of the support plate 223. At this time, the unprinted keyboard 215 is placed in the limit groove 214 through the cylinder 225, and the printed keyboard 215 is placed on the feed track for transportation. The two keyboards 215 are automatically clamped for continuous and synchronous loading and unloading and transportation of the keyboards 215, thereby improving the continuity and work efficiency of the device.

[0046] The workbench 1 is provided with a dust removal component 3 for removing impurities;

[0047] The dust cleaning component 3 includes a second support block 31, a second motor 32, a support block 33, a limiting rod 34, a threaded rod 35, a guide groove 36, a slide groove 1 37, a support column 1 38, a fixing plate 39 and a cleaning roller 30. The rear side of the upper end of the workbench 1 is fixedly connected to the second support block 31, a pair of limiting rods 34 are fixedly connected in the second support block 31, the left end of the second support block 31 is fixedly connected to the second motor 32, and a threaded rod 35 is rotatably connected in the second support block 31. The threaded rod 35 is located in the middle of the pair of limiting rods 34. The output end of the second motor 32 is passed through The second support block 31 is fixedly connected with the threaded rod 35, the outer wall of the threaded rod 35 is threadedly connected with the support block 33, the upper and lower ends of the support block 33 are slidably connected with the outer wall of the limit rod 34, the front end of the support block 31 is provided with a guide groove 36, the front end of the support block 33 is provided with a slide groove 1 37, the slide groove 1 37 is slidably connected with a support column 1 38, the guide groove 36 is slidably connected with a support column 1 38, the front end of the support column 1 38 passes through the guide groove 36 and is fixedly connected with a pair of fixed plates 39, and the fixed plates 39 are rotatably connected with the cleaning roller 30 at one end thereof;

[0048] In the embodiment of the utility model, when the device starts to clean impurities, the motor 2 32 on the support block 2 31 provides power to drive the threaded rod 35 to rotate, and the rotation of the threaded rod 35 drives the support block 33 to move on the outer wall of the limit rod 34, and the movement of the support block 33 drives the slide groove 1 37 to move, and the slide groove 1 37 presses the support column 1 38 to slide in the guide groove 36, and at the same time, the pressure of the guide groove 36 drives the support column 1 38 to move up and down in the slide groove 1 37, and the movement of the support column 1 38 drives the fixed plate 39 to move, and the movement of the fixed plate 39 drives the cleaning roller 30 to contact the keyboard 215, at this time, the support column 1 38 drives the fixed plate 39 and the cleaning roller 30 to move right, and the cleaning roller 30 moves right while rotating to remove impurities on the keyboard 215, and by cleaning the impurities and dust on the surface of the keyboard 215, it is prevented that the impurities and dust adsorbed on its surface affect the subsequent printing, so that the printed paint cannot be adsorbed on the keyboard 215.

[0049] A screen printing assembly 4 for printing is installed on the workbench 1;

[0050] The screen printing assembly 4 includes a lifting device 41 and a printing device 42, the workbench 1 is connected to the lifting device 41, and the lifting device 41 is connected to the printing device 42;

[0051] The lifting device 41 includes a support block 3 411, a cylinder 2 412, a slide 413, a slide 413, a support plate 2 414 and a support column 2 415. The support block 3 411 is fixedly connected to the left side of the upper end of the workbench 1, and a pair of slides 413 are provided at the right end of the support block 3 411. The bottom of the support block 3 411 is fixedly connected to the cylinder 2 412, and the output end of the cylinder 2 412 is fixedly connected to the support plate 2 414. A pair of support columns 415 are fixedly connected to the front and rear sides of the right end of the support plate 2 414. The support column 415 is slidably connected in the slide 413, and the support column 415 is connected to the printing device 42;

[0052] The printing device 42 includes a guide rail cylinder 2 421, a support plate 3 422, a cylinder 3 423, a U-shaped connecting rod 424, a scraper 425, a printing brush 426, a support frame 427 and a screen printing plate 428. The right end of the support plate 2 414 is fixedly connected to the guide rail cylinder 2 421, the output end of the guide rail cylinder 2 421 is fixedly connected to the support plate 3 422, the upper end of the support plate 3 422 is fixedly connected to a pair of cylinders 3 423, and the output ends of the cylinders 3 423 are fixedly connected. A U-shaped connecting rod 424 is connected, the lower end of the front U-shaped connecting rod 424 passes through the support plate 3 422 and is fixedly connected to a scraper 425, the lower end of the rear U-shaped connecting rod 424 passes through the support plate 3 422 and is fixedly connected to a printing brush 426, the front and rear sides of the right end of the guide cylinder 2 421 are fixedly connected to a support frame 427, the opposite end of the support frame 427 is fixedly connected to a screen printing plate 428, and the upper end of the screen printing plate 428 is in contact with the scraper 425 and the printing brush 426;

[0053] In the embodiment of the utility model, when the device starts to print the keycaps, the cylinder 2 412 in the support block 3 411 of the lifting device 41 of the silk screen assembly 4 provides power to drive the support plate 2 414 to move downward, and the support column 2 415 is driven to move in the slide groove 2 413 by the downward movement of the support plate 2 414, and the guide cylinder 2 421 of the printing device 42 is driven to move downward by the movement of the guide cylinder 2 421, and the support frame 427 is driven to move downward by the downward movement of the guide cylinder 2 421, and the silk screen plate 428 is attached to the surface of the keyboard 215 by the downward moving support frame 427. At this time, by starting a pair of air cylinders on the support plate 3 422 Cylinder three 423 drives the U-shaped connecting rod 424 to move up and down through the alternating up and down movement of cylinder three 423. When the U-shaped connecting rod 424 drives the printing brush 426 to move down, the keyboard 215 is printed. When the U-shaped connecting rod 424 drives the scraper 425 to move down, the printing liquid is re-arranged and leveled. When printing is completed, the support plate 414 and the guide cylinder 421 are driven upward by cylinder two 412. At this time, the screen printing plate 428 is no longer in contact with the keyboard 215, which facilitates the transportation of the keyboard 215 to the next process. Through multiple alternating printing and leveling, the printed pattern can be more clearly adsorbed on the keyboard 215.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A keycap screen printing device capable of continuous loading and unloading, comprising a workbench (1), characterized in that: The workbench (1) is provided with a loading and unloading assembly (2) for continuous loading and unloading of materials; The loading and unloading assembly (2) comprises a rotating device (21) and a loading and unloading device (22), and the workbench (1) is connected to the rotating device (21) and the loading and unloading device (22); The workbench (1) is provided with a dust removal component (3) for removing impurities; A silk screen printing assembly (4) for printing is installed on the workbench (1).

2. The keycap screen printing device capable of continuous loading and unloading according to claim 1 is characterized in that: The rotating device (21) comprises a rotating disk (211), a limiting plate (212), a giving slot (213), a limiting slot (214), a keyboard (215) and a motor (216); the motor (216) is fixedly connected to the top of the workbench (1); the output end of the motor (216) passes through the workbench (1) and is fixedly connected to the rotating disk (211); the upper end of the rotating disk (211) is fixedly connected to the limiting plate (212) at equal intervals; the limiting plate (212) is provided with a giving slot (213); the middle of the limiting plate (212) is provided with a giving slot (213); the giving slot (213) is communicated with the limiting slot (214); and the keyboard (215) is contact-connected in the limiting slot (214).

3. The keycap screen printing device capable of continuous loading and unloading according to claim 2 is characterized in that: The loading and unloading device (22) comprises a support block (221), a guide cylinder (222), a support plate (223), a connecting rod (224), a cylinder (225) and a pneumatic clamp (226); the right side of the upper end of the workbench (1) is fixedly connected to a support block (221); the left end of the support block (221) is fixedly connected to a guide cylinder (222); the left end of the guide cylinder (222) is slidably connected to a slide plate (227); the output end of the guide cylinder (222) and the left end of the slide plate (227) are respectively fixedly connected to a support plate (223); the opposite end of the support plate (223) is fixedly connected to a connecting rod (223); the upper end of the support plate (223) is fixedly connected to a cylinder (225); the output end of the cylinder (225) passes through the support plate (223) and is fixedly connected to a pneumatic clamp (226).

4. The keycap screen printing device capable of continuous loading and unloading according to claim 3 is characterized in that: The limiting groove (214) is an inverted trapezoidal groove with a larger upper end and a smaller lower end.

5. The keycap screen printing device capable of continuous loading and unloading according to claim 4 is characterized in that: The dust cleaning component (3) comprises a second support block (31), a second motor (32), a support block (33), a limiting rod (34), a threaded rod (35), a guide groove (36), a first slide groove (37), a first support column (38), a fixed plate (39) and a cleaning roller (30); the second support block (31) is fixedly connected to the rear side of the upper end of the workbench (1); a pair of limiting rods (34) are fixedly connected inside the second support block (31); the second motor (32) is fixedly connected to the left end of the second support block (31); a threaded rod (35) is rotatably connected inside the second support block (31); the threaded rod (35) is located between the pair of limiting rods (34); the second motor (32) outputs The outlet end passes through the second support block (31) and is fixedly connected to the threaded rod (35); the outer wall of the threaded rod (35) is threadedly connected to the support block (33); the upper and lower ends of the support block (33) are slidably connected to the outer wall of the limit rod (34); the front end of the second support block (31) is provided with a guide groove (36); the front end of the support block (33) is provided with a slide groove (37); the slide groove (37) is slidably connected to a support column (38); the guide groove (36) is slidably connected to a support column (38); the front end of the support column (38) passes through the guide groove (36) and is fixedly connected to a pair of fixed plates (39); one end of the fixed plate (39) is rotatably connected to a cleaning roller (30) toward the other end.

6. The keycap screen printing device capable of continuous loading and unloading according to claim 5 is characterized in that: The screen printing assembly (4) comprises a lifting device (41) and a printing device (42); the workbench (1) is connected to the lifting device (41), and the lifting device (41) is connected to the printing device (42).

7. The keycap screen printing device capable of continuous loading and unloading according to claim 6, characterized in that: The lifting device (41) comprises a support block three (411), a cylinder two (412), a slide groove two (413), a slide groove two (413), a support plate two (414) and a support column two (415). The left side of the upper end of the workbench (1) is fixedly connected with the support block three (411), a pair of slide grooves two (413) is opened at the right end of the support block three (411), the bottom of the support block three (411) is fixedly connected with the cylinder two (412), the output end of the cylinder two (412) is fixedly connected with the support plate two (414), a pair of support columns two (415) are fixedly connected at the front and rear sides of the right end of the support plate two (414), the support column two (415) is slidably connected in the slide groove two (413), and the support column two (415) is connected to the printing device (42).

8. The keycap screen printing device capable of continuous loading and unloading according to claim 7, characterized in that: The printing device (42) comprises a guide rail cylinder 2 (421), a support plate 3 (422), a cylinder 3 (423), a U-shaped connecting rod (424), a scraper (425), a printing brush (426), a support frame (427) and a screen printing plate (428). The right end of the support plate 2 (414) is fixedly connected to the guide rail cylinder 2 (421), the output end of the guide rail cylinder 2 (421) is fixedly connected to the support plate 3 (422), the upper end of the support plate 3 (422) is fixedly connected to a pair of cylinders 3 (423), and the output ends of the cylinders 3 (423) are both A U-shaped connecting rod (424) is fixedly connected, the lower end of the front U-shaped connecting rod (424) passes through the support plate three (422) and is fixedly connected to a scraper (425), the lower end of the rear U-shaped connecting rod (424) passes through the support plate three (422) and is fixedly connected to a printing brush (426), the front and rear sides of the right end of the guide cylinder two (421) are fixedly connected to a support frame (427), the opposite end of the support frame (427) is fixedly connected to a screen printing plate (428), and the upper end of the screen printing plate (428) is in contact with the scraper (425) and the printing brush (426).

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