Silk-screen printing equipment for paper packaging box

Abstract

The utility model relates to the technical field of silk-screen printing, in particular to a paper packaging box silk-screen printing device which can conduct high-quality silk-screen printing on the surface of a cylindrical packaging paper box and is small in limitation and good in practicability. Comprising a bottom plate, a mounting frame, a printing frame and rollers, the device further comprises two shaft rods, two first sliding rails, a sliding table, two stand columns, two driven wheels and two driving strips, the shaft rods are concentrically arranged at the two ends of the rolling wheel, the two first sliding rails are installed on the bottom plate in parallel, the sliding table is installed on the two first sliding rails in a sliding mode, the stand columns are vertically arranged at the two ends of the sliding table, and the two shaft rods are inserted into sliding grooves of the two stand columns in a sliding mode respectively. The two stand columns are installed on the base, the two driven wheels are rotationally installed on the two stand columns correspondingly, the clamping assemblies are arranged on the opposite end faces of the two driven wheels correspondingly, the two driving strips are installed on the two sides of the printing frame correspondingly, the two driving strips are aligned with the two driven wheels correspondingly, and after the printing frame descends, the two driving strips are engaged with the two driven wheels.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing, in particular to a paper packaging box screen printing device. Background Art

[0002] Screen printing belongs to hole printing, which is known as the four major printing methods together with flat printing, relief printing and gravure printing. The Chinese utility model patent with the prior art publication number CN218701951U proposes a paper packaging box screen printing device. When the screen printing device is in use, the ink is filled into the transition box by a pump body, and finally flows down along the transition box to the inner wall of the oil outlet tank, and flows down from the inner wall to the pressure wheel. In conjunction with the action of the reciprocating moving component, the pressure wheel can evenly apply the ink on the screen printing plate to keep the ink thickness consistent, thereby effectively completing the printing task and improving the overall work efficiency.

[0003] However, the above-mentioned prior art can only perform screen printing on the surface of a square paper packaging box, but cannot perform screen printing on the surface of a cylindrical paper packaging box, which has great limitations. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a paper packaging box screen printing device which can perform high-quality screen printing on the surface of a cylindrical packaging paper box, has few limitations and is good in practicality.

[0005] The utility model discloses a screen printing device for paper packaging boxes, comprising a base plate, a mounting frame, a printing frame and a roller, the mounting frame is mounted on the base plate, the printing frame can be lifted and mounted on the mounting frame, the printing frame is arranged horizontally, and the roller rolls on the printing frame; the utility model also comprises two shaft rods, two slide rails, a slide table, two columns, two driven wheels and two driving strips, both ends of the rollers are concentrically provided with shaft rods, the two slide rails are parallelly mounted on the base plate, the slide table is slidably mounted on the two slide rails through a slider, both ends of the slide table are vertically provided with columns, the two columns are provided with vertical slide grooves, the two shaft rods are respectively slidably inserted in the slide grooves of the two columns, the two driven wheels are respectively rotatably mounted on the two columns, the two driven wheels are symmetrically arranged, and clamping components are arranged on the opposite end surfaces of the two driven wheels, the clamping components clamp the two ends of the cylindrical paper box, the two driving strips are respectively mounted on the two sides of the printing frame, the two driving strips are respectively aligned with the two driven wheels, and after the printing frame is lowered, the two driving strips are aligned with the two driven wheels. The driven wheels are meshed; during operation, the screen printing plate is loaded on the printing frame, and the roller moves to one end of the printing frame, and the roller pushes the slide to one end of the two slide rails through two shafts and two columns, and the two ends of the cylindrical packaging paper box are respectively clamped on the clamping assemblies on the two driven wheels, and the cylindrical packaging paper box is concentric with the two driven wheels, and the printing frame descends, so that the two driving strips are respectively meshed with the two driven wheels, and the outer surface of the cylindrical paper box is contacted with the lower end surface of the screen printing plate, and the driving roller rolls toward the other end of the printing frame, so that the roller pushes the slide and the two driven wheels to move to the other end of the two slide rails through the two shafts and two columns, so that the two driven wheels rotate under the meshing action of the two driving strips, and the two driven wheels drive the cylindrical packaging paper box to rotate through the clamping assembly, and the surface linear speed of the cylindrical packaging paper box is the same as the speed of the roller movement and is opposite in direction, thereby improving the screen printing quality on the surface of the cylindrical packaging paper box, with small limitations and good practicality.

[0006] Preferably, it also includes two screws and multiple nuts, the two driven wheels are conical, the surfaces of the two driving strips facing the two driven wheels are inclined surfaces, the inclined surfaces match the taper of the two driven wheels, screws are concentrically arranged at the outer ends of the two driven wheels, the two screws are respectively inserted into the two columns, the two screws are rotatably threaded with two nuts, and the two nuts lock the two screws on the two columns respectively; the distance between the two driven wheels and the two columns is adjusted by the two screws, and the two screws are locked by the multiple nuts, so that different parts of the two driven wheels are meshed with the two driving strips, so that the meshing of the two driven wheels and the two driving strips matches the diameter of the cylindrical packaging box, so that cylindrical packaging boxes of different diameters can be clamped between the two driven wheels, thereby improving versatility.

[0007] Preferably, the clamping assembly includes multiple locking bolts, multiple arm plates and multiple struts. Multiple slide grooves are circumferentially arranged on the inner end surface of the driven wheel, and the multiple slide grooves are respectively arranged along the radial direction of the driven wheel. The locking bolts are rotatably screwed in the multiple slide grooves, and the multiple arm plates are respectively slidably inserted in the multiple slide grooves. Long slot holes are arranged on the multiple arm plates, and the multiple locking bolts pass through the multiple long slot holes to lock the multiple arm plates in the multiple slide grooves. Struts are arranged on the outer ends of the multiple arm plates; the arm plates are moved along the slide grooves to adjust the distance between the struts and the axis of the driven wheel, so that the multiple struts are arranged circumferentially with the axis of the driven wheel, and the multiple struts are matched with the diameter of the cylindrical packaging box, and the multiple locking bolts are rotated and tightened to lock the multiple arm plates, so as to clamp cylindrical packaging boxes of different diameters. The structure is simple and the versatility is good.

[0008] Preferably, it also includes a lifting cylinder, the fixed end of which is installed on the mounting frame, and the lower end of the piston rod of the lifting cylinder is connected to the printing frame; the piston rod of the lifting cylinder is extended and retracted to drive the printing frame to rise and fall, so that the screen printing plate on the printing frame contacts the surface of the cylindrical packaging box.

[0009] Preferably, it also includes two slide rails 2, two sliders 2, two lead screws and two stepper motors. The two slide rails 2 are respectively installed on the two side walls of the printing frame, the two sliders 2 are respectively slidably installed on the two slide rails 2, the two sliders 2 are respectively connected to the two shafts, the two lead screws are respectively rotatably installed on the two side walls of the printing frame, the two slide rails 2 are respectively connected to the two shafts, the two lead screws are respectively rotatably installed on the two side walls of the printing frame, the two slide rails 2 are respectively connected to the two lead screws through the lead screw nuts, the two stepper motors are respectively installed on the two side walls of the printing frame, and the two stepper motors are respectively connected to the two lead screws; the two stepper motors drive the lead screws to rotate, and the two lead screws respectively drive the two slide rails 2 to move along the two slide rails 2, so that the two slide rails 2 drive the rollers to roll on the printing frame through the two shafts, which has good practicality.

[0010] Preferably, it also includes an ink supply module and a transition box, the ink supply module is installed on the mounting frame, the transition box is installed above the roller, and the ink supply module and the transition box are connected by an ink supply pipeline; the ink supply module transports the ink to the transition box through the pipeline, and the transition box evenly applies the ink on the roller, which is beneficial to improving the uniformity of printing.

[0011] Preferably, it also includes two synchronous wheels, a synchronous belt and a winder, the two synchronous wheels are rotatably installed at the two ends of the base plate respectively, the synchronous belt is mounted on the two synchronous wheels, the synchronous belt is connected to the slide, the winder is installed on the base plate, and the input shaft of the winder is transmission-connected to a synchronous wheel; when the slide moves, it drives the synchronous belt to rotate on the two synchronous wheels, and at the same time makes the winder rotate and accumulate force. When the printing on the surface of the cylindrical packaging paper box is completed, the printing frame rises to disengage the two driving strips from the two driven wheels, and the elastic force of the winder is released to drive the synchronous wheel to rotate and reset, the synchronous wheel drives the synchronous belt to rotate and reset, and the synchronous belt drives the slide to reset, so as to prepare for the next printing, which has good practicality.

[0012] Compared with the prior art, the utility model has the following beneficial effects: when working, the two driven wheels rotate under the meshing action of the two driving strips, and the two driven wheels drive the cylindrical packaging box to rotate through the clamping assembly, and the surface linear speed of the cylindrical packaging box is the same as the speed of the roller movement but in the opposite direction, thereby improving the screen printing quality on the surface of the cylindrical packaging box, with small limitations and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a side view structural schematic diagram of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the printing frame, rollers, shafts, slides, columns and driven wheels;

[0016] Figure 4 It is a schematic diagram of the structure of the slide, column, driven wheel, drive bar and screw;

[0017] Figure 5 It is a schematic diagram of the structure of the driven wheel, the screw rod, the nut and the clamping assembly;

[0018] Figure 6 It is a structural diagram of the base plate, synchronous wheel, synchronous belt and reel.

[0019] Markings in the attached drawings: 1. Base plate; 2. Mounting frame; 3. Printing frame; 4. Roller; 5. Shaft; 6. Slide rail 1; 7. Slide; 8. Column; 9. Driven wheel; 10. Drive bar; 11. Screw; 12. Nut; 13. Locking bolt; 14. Arm plate; 15. Strut; 16. Lifting cylinder; 17. Slide rail 2; 18. Slider 2; 19. Screw; 20. Stepping motor; 21. Ink supply module; 22. Transition box; 23. Synchronous wheel; 24. Synchronous belt; 25. Winder. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] Example 1

[0022] like Figures 1 to 3As shown, a screen printing device for a paper packaging box includes a bottom plate 1, a mounting frame 2, a printing frame 3 and a roller 4. The mounting frame 2 is mounted on the bottom plate 1, and the printing frame 3 can be lifted and lowered on the mounting frame 2. The printing frame 3 is arranged horizontally, and the roller 4 rolls on the printing frame 3; it also includes two shafts 5, two slide rails 6, a slide table 7, two columns 8, two driven wheels 9 and two driving strips 10. The shafts 5 are concentrically arranged at both ends of the roller 4, and the two slide rails 6 are parallelly mounted on the bottom plate 1. The slide table 7 slides through the slider The two slide rails 6 are installed, and the two ends of the slide 7 are vertically provided with columns 8, and the two columns 8 are provided with vertical slide grooves. The two shafts 5 are respectively slidably inserted in the slide grooves of the two columns 8, and the two driven wheels 9 are respectively rotatably installed on the two columns 8. The two driven wheels 9 are symmetrically arranged, and the opposite end surfaces of the two driven wheels 9 are provided with clamping components, and the clamping components clamp the two ends of the cylindrical paper box. The two driving bars 10 are respectively installed on the two sides of the printing frame 3, and the two driving bars 10 are respectively connected to the two driven wheels 9. After the printing frame 3 is lowered, the two driving bars 10 are meshed with the two driven wheels 9; it also includes a lifting cylinder 16, the fixed end of the lifting cylinder 16 is installed on the mounting frame 2, and the lower end of the piston rod of the lifting cylinder 16 is connected to the printing frame 3; it also includes two slide rails 17, two sliders 18, two screw rods 19 and two stepping motors 20, the two slide rails 17 are respectively installed on the two side walls of the printing frame 3, the two sliders 18 are respectively slidably installed on the two slide rails 17, and the two sliders 18 are respectively connected to the two shaft rods 5, two screw rods 19 are rotatably mounted on the two side walls of the printing frame 3, two sliders 18 are respectively connected to the two screw rods 19 through screw nuts, two stepping motors 20 are respectively mounted on the two side walls of the printing frame 3, and the two stepping motors 20 are respectively connected to the two screw rods 19; it also includes an ink supply module 21 and a transition box 22, the ink supply module 21 is mounted on the mounting frame 2, the transition box 22 is mounted above the roller 4, and the ink supply module 21 and the transition box 22 are connected through an ink delivery pipeline.

[0023] During operation, the screen printing plate is loaded on the printing frame 3, and the roller 4 moves to one end of the printing frame 3. The roller 4 pushes the slide 7 to move to one end of the two slide rails 6 through the two shafts 5 and the two columns 8, and the two ends of the cylindrical packaging paper box are respectively clamped on the clamping assemblies on the two driven wheels 9, and the cylindrical packaging paper box is concentric with the two driven wheels 9. The piston rod of the lifting cylinder 16 is extended to make the printing frame 3 descend, so that the two driving strips 10 are respectively engaged with the two driven wheels 9, and at the same time, the outer surface of the cylindrical paper box is in contact with the lower end surface of the screen printing plate. The ink supply module 21 transports the ink to the transition box 22 through the pipeline, and the transition box 22 evenly applies the ink on the roller 4. The two stepping motors 20 drive the screw rod 19 to rotate, and the two screw rods 19 respectively drive the two The slider 2 18 moves along the two slide rails 2 17, so that the two sliders 2 18 drive the rollers 4 to roll toward the other end of the printing frame 3 through the two shafts 5, so that the rollers 4 push the slide 7 and the two driven wheels 9 to move toward the other end of the two slide rails 1 6 through the two shafts 5 and the two columns 8, so that the two driven wheels 9 rotate under the meshing action of the two driving strips 10, and the two driven wheels 9 drive the cylindrical packaging box to rotate through the clamping assembly, and the surface linear speed of the cylindrical packaging box is the same as the speed of the roller 4 movement and the opposite direction, thereby improving the screen printing quality on the surface of the cylindrical packaging box, with small limitations and good practicality; the screen printing plate on the printing frame 3 is in contact with the surface of the cylindrical packaging box, which is practical and conducive to improving the uniformity of printing.

[0024] Example 2

[0025] like Figure 4 and Figure 5 As shown, on the basis of embodiment 1, it also includes two screws 11 and multiple nuts 12, the two driven wheels 9 are conical, the surfaces of the two driving bars 10 facing the two driven wheels 9 are inclined surfaces, and the inclined surfaces match the tapers of the two driven wheels 9. The outer ends of the two driven wheels 9 are concentrically provided with screws 11, and the two screws 11 are respectively inserted into the two columns 8, and the two nuts 12 are rotatably screwed on the two screws 11, and the two nuts 12 respectively lock the two screws 11 on the two columns 8; the clamping assembly includes It includes multiple locking bolts 13, multiple arm plates 14 and multiple struts 15. Multiple sliding grooves are circumferentially arranged on the inner end surface of the driven wheel 9. The multiple sliding grooves are respectively arranged along the radial direction of the driven wheel 9. The locking bolts 13 are rotatably screwed in the multiple sliding grooves. The multiple arm plates 14 are respectively slidably inserted in the multiple sliding grooves. Long slot holes are arranged on the multiple arm plates 14. The multiple locking bolts 13 respectively pass through the multiple long slot holes to lock the multiple arm plates 14 in the multiple sliding grooves. Struts 15 are arranged on the outer ends of the multiple arm plates 14.

[0026] Move the arm plate 14 along the slide slot to adjust the distance between the support rod 15 and the axis of the driven wheel 9, so that multiple support rods 15 are arranged on the circumference of the axis of the driven wheel 9, and the multiple support rods 15 match the diameter of the cylindrical packaging box, rotate and tighten the multiple locking bolts 13 to lock the multiple arm plates 14, so as to clamp the cylindrical packaging boxes of different diameters, adjust the distance between the two driven wheels 9 and the two columns 8 by two screws 11, and lock the two screws 11 by multiple nuts 12, so that different parts of the two driven wheels 9 are engaged with the two driving bars 10, so that the cooperation between the two driven wheels 9 and the two driving bars 10 matches the diameter of the cylindrical packaging paper box.

[0027] Example 3

[0028] like Figure 1 and Figure 6 As shown, on the basis of Example 1, it also includes two synchronous wheels 23, a synchronous belt 24 and a reel 25, the two synchronous wheels 23 are rotatably installed at the two ends of the base plate 1 respectively, the synchronous belt 24 is sleeved on the two synchronous wheels 23, the synchronous belt 24 is connected to the slide 7, the reel 25 is installed on the base plate 1, and the input shaft of the reel 25 is transmission-connected with a synchronous wheel 23; when the slide 7 moves, it drives the synchronous belt 24 to rotate on the two synchronous wheels 23, and at the same time makes the reel 25 rotate and accumulate force, when the surface of the cylindrical packaging paper box is printed, the printing frame 3 rises to make the two driving strips 10 disengage from the two driven wheels 9, the elastic force of the reel 25 is released to drive the synchronous wheel 23 to rotate and reset, the synchronous wheel 23 drives the synchronous belt 24 to rotate and reset, and the synchronous belt 24 drives the slide 7 to reset, so as to prepare for the next printing.

[0029] like Figures 1 to 6As shown, the utility model is a paper packaging box screen printing device. When it is working, firstly, the positions of two screws 11 and two columns 8 are adjusted according to the diameter of the cylindrical packaging paper box, the screen printing plate is loaded on the printing frame 3, and the roller 4 moves to one end of the printing frame 3. The roller 4 pushes the slide 7 to move to one end of two slide rails 6 through two shafts 5 and two columns 8, and then the two ends of the cylindrical packaging paper box are clamped between a plurality of support rods 15 respectively, and the cylindrical packaging paper box is made concentric with the two driven wheels 9, and the two lifting cylinders 16 drive the printing frame 3 to descend, so that the two driving bars 10 are respectively engaged with the two driven wheels 9, and at the same time, the outer surface of the cylindrical paper box is in contact with the lower end surface of the screen printing plate, and then the two stepping motors 20 are operated. The driving roller 4 rolls toward the other end of the printing frame 3, so that the roller 4 pushes the slide 7 and the two driven wheels 9 to move toward the other end of the two slide rails 6 through the two shafts 5 and the two columns 8, so that the two driven wheels 9 rotate under the meshing action of the two driving strips 10, and the two driven wheels 9 drive the cylindrical packaging paper box to rotate through the clamping assembly, so that the roller 4 prints the surface of the cylindrical packaging paper box through the screen printing plate on the printing frame 3. Finally, the printing is completed, the printing frame 3 is raised to disengage the two driving strips 10 from the two driven wheels 9, and the elastic force of the retractor 25 is released to drive the synchronous wheel 23 to rotate and reset, and the synchronous wheel 23 drives the synchronous belt 24 to rotate and reset, and the synchronous belt 24 drives the slide 7 to reset, and prepares for the next printing.

[0030] The main functions achieved by this utility model are:

[0031] 1. It can perform high-quality screen printing on the surface of cylindrical packaging cartons, with little limitation and good practicality;

[0032] 2. The surface linear speed of the cylindrical packaging carton is in the same direction as the moving speed of the roller 4 but in the opposite direction, thereby improving the screen printing quality on the surface of the cylindrical packaging carton;

[0033] 3. It can print cylindrical packaging cartons of different diameters, with good versatility;

[0034] 3. Capable of automatic printing with high work efficiency.

[0035] The utility model is a paper packaging box screen printing device, and its installation method, connection method or setting method are all common mechanical methods, and can be implemented as long as they can achieve their beneficial effects; the utility model is a paper packaging box screen printing device. The base plate 1, the mounting frame 2, the printing frame 3, the roller 4, the shaft 5, the slide rail 1 6, the slide 7, the driven wheel 9, the driving bar 10, the screw 11, the nut 12, the locking bolt 13, the lifting cylinder 16, the slide rail 2 17, the slider 2 18, the screw 19, the stepping motor 20, the ink supply module 21, the transition box 22, the synchronous wheel 23, the synchronous belt 24, and the retractor 25 are purchased on the market, and the technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without the need for the technical personnel in this field to pay creative labor.

[0036] All technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A paper packaging box screen printing device, comprising a bottom plate (1), a mounting frame (2), a printing frame (3) and a roller (4), wherein the mounting frame (2) is mounted on the bottom plate (1), the printing frame (3) is escalably mounted on the mounting frame (2), the printing frame (3) is arranged horizontally, and the roller (4) rolls on the printing frame (3); characterized in that: The invention also comprises two shafts (5), two slide rails (6), a slide table (7), two columns (8), two driven wheels (9) and two driving bars (10). The shafts (5) are concentrically arranged at both ends of the roller (4). The two slide rails (6) are parallelly arranged on the bottom plate (1). The slide table (7) is slidably arranged on the two slide rails (6) through a slider. The columns (8) are vertically arranged at both ends of the slide table (7). The two columns (8) are vertically arranged on the two columns (8). The two shafts (5) are respectively slidably inserted into the two driven wheels. In the slide grooves of the two upright posts (8), two driven wheels (9) are rotatably mounted on the two upright posts (8), the two driven wheels (9) are symmetrically arranged, and clamping assemblies are arranged on the opposite end faces of the two driven wheels (9), and the clamping assemblies clamp the two ends of the cylindrical paper box, and two driving bars (10) are respectively mounted on the two sides of the printing frame (3), and the two driving bars (10) are respectively aligned with the two driven wheels (9), and after the printing frame (3) is lowered, the two driving bars (10) are meshed with the two driven wheels (9).

2. A paper packaging box screen printing device as claimed in claim 1, characterized in that: The invention also comprises two screw rods (11) and a plurality of nuts (12); the two driven wheels (9) are conical; the surfaces of the two driving bars (10) facing the two driven wheels (9) are inclined surfaces, the inclined surfaces match the taper of the two driven wheels (9); the outer ends of the two driven wheels (9) are concentrically provided with screw rods (11); the two screw rods (11) are respectively inserted into the two upright posts (8); the two screw rods (11) are rotatably threaded with two nuts (12); the two nuts (12) respectively lock the two screw rods (11) on the two upright posts (8).

3. A paper packaging box screen printing device as claimed in claim 1, characterized in that: The clamping assembly comprises a plurality of locking bolts (13), a plurality of arm plates (14) and a plurality of struts (15). A plurality of slide grooves are circumferentially arranged on the inner end surface of the driven wheel (9), and the plurality of slide grooves are respectively arranged along the radial direction of the driven wheel (9). The locking bolts (13) are rotatably screwed in the plurality of slide grooves. The plurality of arm plates (14) are respectively slidably inserted in the plurality of slide grooves. The plurality of arm plates (14) are respectively provided with long slot holes. The plurality of locking bolts (13) respectively pass through the plurality of long slot holes to lock the plurality of arm plates (14) in the plurality of slide grooves. The struts (15) are respectively arranged on the outer ends of the plurality of arm plates (14).

4. A paper packaging box screen printing device as claimed in claim 1, characterized in that: It also comprises a lifting cylinder (16), the fixed end of which is mounted on the mounting frame (2), and the lower end of the piston rod of the lifting cylinder (16) is connected to the printing frame (3).

5. The screen printing device for paper packaging box according to claim 1, characterized in that: The invention also comprises two slide rails (17), two sliders (18), two screw rods (19) and two stepping motors (20). The two slide rails (17) are respectively mounted on the two side walls of the printing frame (3). The two sliders (18) are respectively slidably mounted on the two slide rails (17). The two sliders (18) are respectively connected to the two shaft rods (5). The two screw rods (19) are respectively rotatably mounted on the two side walls of the printing frame (3). The two slide rails (18) are respectively connected to the two screw rods (19) through screw rod nuts. The two stepping motors (20) are respectively mounted on the two side walls of the printing frame (3). The two stepping motors (20) are respectively connected to the two screw rods (19).

6. The screen printing device for paper packaging box according to claim 1, characterized in that: It also includes an ink supply module (21) and a transition box (22), wherein the ink supply module (21) is mounted on the mounting frame (2), and the transition box (22) is mounted above the roller (4), and the ink supply module (21) and the transition box (22) are connected via an ink supply pipeline.

7. The screen printing device for paper packaging box according to claim 1, characterized in that: The invention also comprises two synchronous wheels (23), a synchronous belt (24) and a retractor (25), wherein the two synchronous wheels (23) are rotatably mounted on the two ends of the base plate (1), the synchronous belt (24) is sleeved on the two synchronous wheels (23), the synchronous belt (24) is connected to the slide table (7), the retractor (25) is mounted on the base plate (1), and the input shaft of the retractor (25) is drivingly connected to one synchronous wheel (23).

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