Flexographic printing press and its operation method

Abstract

This invention belongs to the technical field of flexographic printing presses, and particularly relates to a flexographic printing press and its operating method. It includes an unwinding component and a rewinding component. The unwinding component is located at the front end of the frame, and the rewinding component is located at the rear end of the frame. A primary printing component and a secondary printing component are vertically arranged within the frame. A dust removal component is located within the frame, between the unwinding component and the primary printing component. The printing material pulled out from the unwinding component passes through the dust removal component to remove dust. After dust removal, the printing material undergoes a first printing process through the primary printing component, followed by a second printing process through the secondary printing component. After printing, the printing material is wound up by the rewinding component, and the dust is removed from the printing material by the dust removal component to prevent dust from adhering to the printing material and affecting subsequent printing results.

Description

Technical Field

[0001] This invention belongs to the field of flexographic printing press technology, and particularly relates to a flexographic printing press and its operating method. Background Technology

[0002] In existing flexographic printing processes, dust on the printing substrate remains between the substrate and the ink during subsequent printing, affecting the appearance and printing effect. Flexographic printing presses are not equipped with dust removal components.

[0003] For example, patent application number CN202111231488.5 describes a flexographic printing machine and its operating method, system, flexographic die, and sleeve. This flexographic printing machine has an impression cylinder carrying the sleeve or has a flexographic impression cylinder and a counter-pressure cylinder forming a printing gap with it. The sleeve has at least one flexographic die. In this case, a web composed of printing material is printed in the printing gap, and the conveying speed of the web is adjusted. The adjustment is performed automatically based on the dot density of the flexographic die, i.e., the location-related density of the printed protrusions of the flexographic die, or data derived from it through computational technology, or based on the channel of the flexographic die or the impression cylinder, or data derived from it through computational technology. However, the disadvantage of this technical solution is that it does not have a dust removal component, which cannot remove dust from the printing material, affecting the printing effect. Summary of the Invention

[0004] The purpose of this invention is to provide a flexographic printing press and its operating method to solve the problems in the prior art. The specific technical solution is as follows:

[0005] A flexographic printing press includes an unwinding component and a rewinding component. The unwinding component is located at the front end of a frame, and the rewinding component is located at the rear end of the frame. A primary printing component and a secondary printing component are arranged vertically inside the frame. A dust removal component is provided inside the frame and is located between the unwinding component and the primary printing component.

[0006] Furthermore, the unwinding component includes two support arms, one end of which is rotatably connected to the frame, and the other end of which is provided with a limiting component. The limiting component limits the printing material roll to the opening at the end of the support arm, and both the limiting component and the support arm are rotatably connected to the printing material roll.

[0007] Furthermore, the limiting component includes a bracket, which is fixed on the support arm. A slider is slidably connected inside the bracket, and a spring is provided between the bracket and the slider. A rotating wheel is rotatably connected inside the bracket, and the slider is engaged in an opening on the rotating wheel. The printing material roll is rotatably connected to the rotating wheel.

[0008] Furthermore, the frame is fixedly connected to the cylinder, the cylinder output end is connected to the support arm, two guide rollers are rotatably connected between the two support arms, and a guide roller is fixed between the two support arms. The printing material pulled out from the printing material roll passes through the two guide rollers and the guide roller and enters the dust removal component.

[0009] Furthermore, the dust removal component includes two upper dust removal wheels and two lower dust removal wheels. The two upper dust removal wheels are located on the upper side of the printing material, and the two lower dust removal wheels are located on the lower side of the printing material. The ends of the two upper dust removal wheels are connected by a belt drive, and the ends of the two lower dust removal wheels are connected by a belt drive. The end of one of the upper dust removal wheels is connected to the end of the lower dust removal wheel directly below it by a gear meshing drive. One of the lower dust removal wheels is driven by a motor, which is fixed to the outer wall of the frame.

[0010] Furthermore, two guide rollers 3 are rotatably connected within the frame, and impression roller 1 and impression roller 2 are rotatably connected within the frame. The end of impression roller 1 is connected to motor 2, and the end of impression roller 2 is connected to motor 5. Both motor 2 and motor 5 are fixed on the outer wall of the frame. The printing material passes through the two guide rollers 3, is printed once between the primary printing component and impression roller 1, and is printed a second time between the secondary printing component and impression roller 2.

[0011] Furthermore, two guide rollers are rotatably connected inside the frame. The printing material passing between the two guide rollers is dried by two sets of hot air blowers, which are respectively installed on both sides of the inner wall of the frame.

[0012] The winding component includes a winding arm, one end of which is fixed to the frame, and the other end of the frame is provided with a groove. A winding drum is rotatably connected in the groove. The dried printing material is wound onto the winding drum. The end of the winding drum is connected to a drive motor, which is fixed to the winding arm.

[0013] Furthermore, the primary printing component includes a housing, which is fixed to a frame. An ink trough is provided at the bottom of the housing. An anilox roller is rotatably connected inside the housing. A doctor blade is provided on the side of the anilox roller and is fixed to the housing by fixing screws. Arc grooves are provided on both sides of the housing. A roller bracket is slidably connected in the arc grooves. A printing plate cylinder is rotatably connected in the roller bracket. A pressure cap is inserted into the housing and is fixed to the housing by pressure plate. A spring is provided between the housing and the pressure plate.

[0014] Furthermore, the roller bracket includes an end assembly that slides within an arc groove, with its end threadedly connected to a fixing nut, and the roller bracket rotatably connected within the end assembly.

[0015] The printing cylinder includes an inner column that rotates within an end assembly. The end of the inner column is connected to the output end of a motor, which is fixed to the end assembly. A sleeve is fitted around the outer side of the inner column, and a flexographic printing mold is provided on the outer side of the sleeve.

[0016] A method for operating a flexographic printing press, applicable to any of the flexographic printing presses described above, includes the following steps:

[0017] S1. The printing material roll is installed on the unwinding component, and the printing material pulled out from the printing material roll passes through two guide rollers and guide roller 1 and guide roller 2 and enters the dust removal component;

[0018] S2. The dust removal component cleans the upper and lower surfaces of the printing material. After cleaning, the printing material passes through two guide rollers, then passes between the printing component and the impression cylinder for the first printing, and then passes between the printing component and the impression cylinder for the second printing.

[0019] S3. After printing, the substrate is dried by a hot air blower and then wound up by a winding unit.

[0020] The advantages of this invention are:

[0021] 1. The printing material pulled out from the unwinding unit is cleaned of dust by the dust removal unit. After being cleaned of dust, the printing material is printed for the first time by the primary printing unit, and then printed for the second time by the secondary printing unit. After printing, the printing material is rolled up by the rewinding unit, and the dust is cleaned off the printing material by the dust removal unit to prevent dust from adhering to the printing material and affecting subsequent printing.

[0022] 2. Each set of hot air blowers includes two hot air blowers, which are arranged side by side between two guide rollers. The two hot air blowers increase the drying stroke of the printing material and improve the drying effect of the printing material.

[0023] 3. After the printing component prints through the substrate, the substrate moves upward from the lower end of the guide roller five, moving upward between the flexographic die one and the impression cylinder three. This allows the flexographic die one to print ink on the other side of the substrate, thus completing the switch between printing on one side of the substrate by the first printing component and printing on the other side by the second printing component. Switching between printing on the same side and printing on both sides is convenient, quick, and saves time and effort. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 ;

[0027] Figure 4 for Figure 1 A magnified view of a portion of the image;

[0028] Figure 5 This is a schematic diagram of the rotary wheel structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the primary printing component of the present invention. Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the structure of the primary printing component of the present invention. Figure 2 ;

[0031] Figure 8 This is a schematic diagram of the structure of the primary printing component of the present invention. Figure 3 ;

[0032] Figure 9 This is a schematic diagram of the structure of the primary printing component of the present invention. Figure 4 ;

[0033] Figure 10 This is a schematic diagram of the structure of the primary printing component of the present invention. Figure 5 ;

[0034] Figure 11 This is a schematic diagram of the secondary printing component structure of the present invention. Figure 1 ;

[0035] Figure 12 This is a schematic diagram of the secondary printing component structure of the present invention. Figure 2 ;

[0036] Figure 13 This is a schematic diagram of the secondary printing component structure of the present invention. Figure 3 ;

[0037] Figure 14 This is a schematic diagram of the secondary printing component structure of the present invention. Figure 4 ;

[0038] Figure 15 This is a schematic diagram of the secondary printing component structure of the present invention. Figure 5 ;

[0039] Explanation of markings in the diagram:

[0040] 1. Support arm; 2. Printing material roll; 3. Bracket; 4. Spring 1; 5. Slider; 6. Rotary wheel; 7. Cylinder; 8. Frame; 9. Guide roller 1; 10. Guide roller 2; 11. Upper cleaning wheel; 12. Lower cleaning wheel; 13. Motor 1; 14. Primary printing component; 1401. Housing; 1402. Ink trough; 1403. Anilox roller; 1404. Squeegee; 1405. Curved groove; 1406. Inner column; 1407. Sleeve; 1408. Flexographic printing mold; 1409. End fitting; 1410. Fixing nut; 1411. Motor 6; 1412. Pressure cap; 1413. Pressure plate; 1414. Spring 2; 1415. Secondary printing component; 15. Housing 1 501; Ink trough 1; 1502; Doctor blade 1; 1503; Impression cylinder 3; 1504; Motor 7; 1505; Anilox roller 1; 1506; Curved groove 1; 1507; Guide roller 5; 1508; Inner column 1; 1509; Sleeve 1; 1510; Flexographic die 1; 1511; End fitting 1; 1512; Fixing nut 1; 1513; Motor 8; 1514; Pressure cap 1; 1515; Pressure plate 1; Spring 3; 1517; Control panel 16; Guide roller 3; 17; Impression cylinder 1; 18; Impression cylinder 2; 19; Guide roller 4; 20; Hot air blower; 21; Rewinding arm; 22; Rewinding drum; 23; Motor 2; 24; Motor 5; 25. Detailed Implementation

[0041] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Example 1

[0044] like Figure 1-15 As shown, a flexographic printing machine includes an unwinding component and a rewinding component. The unwinding component is located at the front end of a frame 8, and the rewinding component is located at the rear end of the frame 8. A primary printing component 14 and a secondary printing component 15 are arranged vertically inside the frame 8. A dust removal component is provided inside the frame 8, and the dust removal component is located between the unwinding component and the primary printing component 14.

[0045] The working principle of the above technical solution is as follows: the printing material pulled out from the unwinding part is cleaned of dust by the dust removal part. After the dust is removed, the printing material is printed for the first time by the primary printing part 14, and then printed for the second time by the secondary printing part 15. After printing, the printing material is rolled up by the winding part. The dust is then removed by the dust removal part to prevent dust from adhering to the printing material and affecting subsequent printing.

[0046] Example 2

[0047] like Figure 1-15 As shown, the unwinding component includes two support arms 1. One end of each support arm 1 is rotatably connected to the frame 8. The other end of each support arm 1 is provided with a limiting component. The limiting component limits the printing material roll 2 to the opening at the end of the support arm 1. Both the limiting component and the support arm 1 are rotatably connected to the printing material roll 2.

[0048] The limiting component includes a bracket 3, which is fixed on the support arm 1. A slider 5 is slidably connected inside the bracket 3. A spring 4 is provided between the bracket 3 and the slider 5. A rotating wheel 6 is rotatably connected inside the bracket 3. The slider 5 is engaged in the opening 1 on the rotating wheel 6. The printing material roll 2 is rotatably connected to the rotating wheel 6.

[0049] The frame 8 is fixedly connected to the cylinder 7. The output end of the cylinder 7 is connected to the support arm 1. Two guide rollers 9 are rotatably connected between the two support arms 1. A guide roller 10 is fixed between the two support arms 1. The printing material pulled out from the printing material roll 2 enters the dust removal component through the two guide rollers 9 and the guide roller 10.

[0050] The working principle of the above technical solution is as follows: Pulling the slider 5 backward compresses the spring 4, rotates the wheel 6, and causes the opening on the wheel 6 to coincide with the opening on the support arm 1, so that the printing material roll 2 can be removed or replaced. When the replaced printing material roll 2 is put back into the opening on the support arm 1, rotate the wheel 6 to offset the opening on the wheel 6 from the support arm 1 until the wheel 6 rotates to the point where its opening faces the slider 5. Under the action of the spring 4, the slider 5 moves forward and is locked in the opening on the wheel 6 to prevent the wheel 6 from rotating at will, thereby limiting both ends of the printing material roll 2 in the opening on the support arm 1.

[0051] When the cylinder 7 is activated, the support arm 1 and the frame 8 can be rotated, thereby adjusting the up and down movement of the printing material roll 2, thus changing the height of the printing material roll 2. The printing material pulled out from the printing material roll 2 enters the dust removal component through two guide rollers 9 and 10.

[0052] Example 3

[0053] like Figure 1-15 As shown, the dust removal component includes two upper dust removal wheels 11 and two lower dust removal wheels 12. The two upper dust removal wheels 11 are located on the upper side of the printing material, and the two lower dust removal wheels 12 are located on the lower side of the printing material. The ends of the two upper dust removal wheels 11 are driven by a belt, and the ends of the two lower dust removal wheels 12 are driven by a belt. The end of one of the upper dust removal wheels 11 is driven by a gear meshing with the end of the lower dust removal wheel 12 directly below it. One of the lower dust removal wheels 12 is driven by a motor 13, which is fixed on the outer wall of the frame 8.

[0054] The working principle of the above technical solution is as follows: The starting motor 13 drives the lower dust cleaning wheel 12 to rotate, and drives the other lower dust cleaning wheel 12 to rotate through the belt. Since the end of one of the upper dust cleaning wheels 11 and the end of the lower dust cleaning wheel 12 directly below it are driven by gear meshing, the rotation of the lower dust cleaning wheel 12 drives the upper dust cleaning wheel 11 above it to rotate. The upper dust cleaning wheel 11 drives the other upper dust cleaning wheel 11 to rotate through the belt, which in turn drives the two upper dust cleaning wheels 11 and the two lower dust cleaning wheels 12 to rotate. The two upper dust cleaning wheels 11 and the two lower dust cleaning wheels 12 sweep away the dust on the upper and lower surfaces of the printing material. The dust under the printing material falls directly to the ground, and the dust on the printing material slides off when the printing material is tilted or moved vertically behind it.

[0055] The purpose of the upper dust removal wheel 11 and the lower dust removal wheel 12 is to separate dust from the printing substrate and prevent dust from affecting subsequent printing.

[0056] Example 4

[0057] like Figure 1-15 As shown, two guide rollers 17 are rotatably connected inside the frame 8, and an impression roller 18 and an impression roller 29 are rotatably connected inside the frame 8. The end of the impression roller 18 is connected to the motor 24, and the end of the impression roller 29 is connected to the motor 55. Both the motor 24 and the motor 55 are fixed on the outer wall of the frame 8. The printing material passes through the two guide rollers 17, is printed once between the primary printing component 14 and the impression roller 18, and is printed a second time between the secondary printing component 15 and the impression roller 29.

[0058] The frame 8 has two guide rollers 20 rotatably connected inside. The printing material between the two guide rollers 20 is dried by two sets of hot air blowers 21. The two sets of hot air blowers 21 are respectively installed on both sides of the inner wall of the frame 8.

[0059] The winding component includes a winding support arm 22, one end of which is fixed to the frame 8. The other end of the frame 8 is provided with a groove, and a winding drum 23 is rotatably connected in the groove. The dried printing material is wound on the winding drum 23. The end of the winding drum 23 is connected to a drive motor, and the drive motor is fixed to the winding support arm 22.

[0060] The working principle of the above technical solution is as follows: Each group of hot air blowers 21 includes two hot air blowers 21, which are arranged side by side between two guide rollers 4 20. The two hot air blowers 21 increase the drying stroke of the printing material and increase the drying effect of the printing material.

[0061] Example 5

[0062] like Figure 1-15 As shown, the primary printing component 14 includes a housing 1401, which is fixed to the frame 8. An ink groove 1402 is provided at the bottom of the housing 1401. An anilox roller 1403 is rotatably connected inside the housing 1401. A doctor blade 1404 is provided on the side of the anilox roller 1403. The doctor blade 1404 is fixed to the housing 1401 by a fixing screw 1405. Arc grooves 1406 are provided on both sides of the housing 1401. A roller bracket is slidably connected in the arc grooves 1406. A printing plate cylinder is rotatably connected in the roller bracket. A pressure cap 1413 is inserted into the housing 1401. The pressure cap 1413 is pressed and fixed to the housing 1401 by a pressure plate 1414. A spring 1415 is provided between the housing 1401 and the pressure plate 1414.

[0063] The roller support includes an end piece 1410, which slides in the arc groove 1406. The end of the end piece 1410 is threadedly connected to the fixing nut 1411, and the roller support is rotatably connected inside the end piece 1410.

[0064] The printing cylinder includes an inner column 1407, which rotates within an end sleeve 1410. The end of the inner column 1407 is connected to the output end of a motor 1412, which is fixed to the end sleeve 1410. A sleeve 1408 is fitted on the outside of the inner column 1407, and a flexographic printing mold 1409 is provided on the outside of the sleeve 1408.

[0065] The working principle of the above technical solution is as follows: Ink is stored in the ink trough 1402. Half of the volume of the anilox roller 1403 is located in the ink in the ink trough 1402, and the other half of the volume of the anilox roller 1403 is located above the ink trough 1402. The anilox roller 1403 is connected to the drive mechanism, which drives the anilox roller 1403 to rotate. The anilox roller 1403 spreads ink on its outer surface. The doctor blade 1404 scrapes away the excess ink on the anilox roller 1403, so that the ink on the outer surface of the anilox roller 1403 is evenly distributed. The anilox roller 1403 is in contact with the flexographic printing mold 1409. The anilox roller 1403 prints ink on the flexographic printing mold 1409. The printing material moves upward between the flexographic printing mold 1409 and the impression cylinder 18.

[0066] Start motor 1412, which drives the inner column 1407 to rotate, drives the sleeve 1408 to rotate, and drives the flexographic printing mold 1409 to rotate with the sleeve 1408. Start motor 24, which drives the impression cylinder 18 to rotate. The impression cylinder 18 presses against one side of the printing material, and the flexographic printing mold 1409 presses against the other side of the printing material, and prints ink on the printing material.

[0067] Rotate the fixing screw 1405 to separate the lower end of the screw 1405 from the doctor blade 1404, thereby moving the doctor blade 1404 and changing the distance between the front end of the doctor blade 1404 and the anilox roller 1403, thus changing the ink thickness on the anilox roller 1403. After adjusting the doctor blade 1404, rotate the screw 1405 again so that the front end of the screw 1405 abuts against the doctor blade 1404, preventing the doctor blade 1404 from moving freely, thus completing the adjustment of the doctor blade 1404.

[0068] Rotating the fixing nuts 1411 on both sides of the housing 1401 causes the end piece 1410 to rotate threadedly with the fixing nuts 1411, separating the fixing nuts 1411 from the outer wall of the housing 1401. This allows the end piece 1410 to slide within the arc groove 1406, thereby changing the position of the printing cylinder and the distance between the flexographic printing mold 1409 and the impression cylinder 18. This allows for adaptive adjustments based on the different thicknesses of the printing material. After adjustment, rotating the fixing nuts 1411 again causes the fixing nuts 1411 to be threadedly connected to the end piece 1410. The fixing nuts 1411 are tightly attached to the outer wall of the housing 1401, preventing the end piece 1410 from moving freely.

[0069] Rotating the fixing nuts 1411 on both sides of the housing 1401 causes the end fitting 1410 to rotate threadedly with the fixing nuts 1411, causing the fixing nuts 1411 to separate from the outer wall of the housing 1401. This allows the end fitting 1410 to slide within the arc groove 1406, thereby changing the position of the printing cylinder. Pulling the pressure plate 1414 compresses the second spring 1415, causing the front end of the pressure plate 1414 to separate from the pressure cover 1413. Pulling up the pressure cover 1413 removes the pressure cover 1413, thereby removing the printing cylinder. This separates the end fitting 1410 from the inner column 1407, allowing the sleeve 1408 and the flexographic printing mold 1409 to slide off the inner column 1407, facilitating the cleaning and replacement of the sleeve 1408 and the flexographic printing mold 1409.

[0070] The sleeve 1408 is fitted onto the outside of the inner post 1407. The outer side of the inner post 1407 is provided with a protrusion, and the sleeve 1408 is provided with a concave groove. The protrusion and the concave groove engage with each other to prevent the sleeve 1408 and the inner post 1407 from rotating at will.

[0071] Example 6

[0072] like Figure 1-15 As shown, the secondary printing component 15 includes a housing 1501, which is located above the housing 1401 and fixed to the frame 8. An ink trough 1502 is provided at the bottom of the housing 1501. An anilox roller 1506 is rotatably connected inside the housing 1501. A doctor blade 1503 is provided on the side of the anilox roller 1506 and is fixed to the housing 1501 by fixing screws. Arc grooves 1500 are provided at both ends of the housing 1501. 7. The arc groove 1507 is slidably connected to the end piece 1512. The end of the end piece 1512 is threadedly connected to the fixing nut 1513. The end piece 1512 is rotatably connected to the inner column 1509. The inner column 1509 is covered with a sleeve 1510. The sleeve 1510 is covered with a flexographic printing mold 1511. The inner column 1509 is connected to the output end of the motor 8 1514. The motor 8 1514 is fixed on the end piece 1512.

[0073] A pressure cap 1515 is inserted into the housing 1501. The pressure cap 1515 is pressed and fixed onto the housing 1501 by a pressure plate 1516. A spring 1517 is provided between the housing 1501 and the pressure plate 1516.

[0074] A guide roller 1508 is rotatably connected to the lower end of the housing 1501, and an impression roller 3 1504 is rotatably connected to the side of the housing 1501. The impression roller 3 1504 is connected to the output end of the motor 7 1505, and the motor 7 1505 is fixed on the housing 1501.

[0075] The working principle of the above technical solution is as follows: After the printing material is printed by the printing component 14, it continues to move upward. The printing material moves upward between the flexographic printing mold 1511 and the impression cylinder 19. The anilox roller 1506 rotates and transfers the ink in the ink trough 1502 to the flexographic printing mold 1511. The flexographic printing mold 151 prints the ink on the printing material. The primary printing component 14 and the secondary printing component 15 print two colors of ink on the same side of the printing material.

[0076] If you want to print component 14 on one side of the substrate in one printing pass and component 15 on the other side in a second printing pass, remove the squeegee 1503 from the left side of the anilox roller 1506, insert the squeegee 1503 into the housing 1501 on the right side of the anilox roller 1506, and rotate the fixing nuts 1513 on both sides of the housing 1501. This will cause the end fitting 1512 to rotate threadedly with the fixing nuts 1513, so that the fixing nuts 1513 and the housing 1501... 01. The outer wall is separated, allowing the end piece 1512 to slide within the arc groove 1507. The end piece 1512 is slid to the other end of the arc groove 1507, and the fixing nut 1513 is rotated again, so that the fixing nut 1513 is tightly attached to the outer surface of the housing 1501, and the end piece 1512 is fixed on the housing 1501 and cannot move freely within the arc groove 1507. At this time, the impression roller 2 19 stops running, and the impression roller 3 1504 starts.

[0077] After the printing material is printed by the first printing component 14, the printing material moves upward from the lower end of the guide roller 1508 and moves upward between the flexographic printing mold 1511 and the impression cylinder 1504, so that the flexographic printing mold 1511 prints ink on the other side of the printing material, thus completing the switch from printing on one side of the printing material by the first printing component 14 to printing on the other side of the printing material by the second printing component 15.

[0078] Switching between printing on the same side and printing on both sides is convenient and quick, saving time and effort.

[0079] Example 7

[0080] like Figure 1-15 As shown, a method for operating a flexographic printing press, applicable to any of the flexographic printing presses described above, includes the following steps:

[0081] S1. Install the printing material roll 2 on the unwinding component. The printing material pulled out from the printing material roll 2 passes through two guide rollers 9 and 10 and enters the dust removal component.

[0082] S2. The dust removal component cleans the upper and lower surfaces of the printing material. After cleaning, the printing material passes through two guide rollers 17, then passes between the printing component 14 and the impression cylinder 18 for a first printing, and then passes between the printing component 15 and the impression cylinder 2 for a second printing.

[0083] S3. After printing, the substrate is dried by hot air blower 21 and then wound up by winding component;

[0084] The working principle of the above technical solution is as follows: The printing material roll 2 is installed on the unwinding component. The printing material pulled out from the printing material roll 2 passes through two guide rollers 19 and 210 and enters the dust removal component. The dust removal component cleans the upper and lower surfaces of the printing material. After cleaning, the printing material passes through two guide rollers 317, and then passes between the first printing component 14 and the first impression cylinder 18 for the first printing. Then it passes between the second printing component 15 and the second impression cylinder 29 for the second printing. After the printing is completed, the printing material is dried by the hot air blower 21 and then wound up by the winding component.

[0085] Example 8

[0086] like Figure 1-15 As shown, it also includes a control panel 16, which is set on the outer wall of the frame 8. The cylinder 7, motor 1, motor 6 1412, motor 7 1505, motor 8 1514, hot air blower 21, motor 2 24 and motor 5 25 are all electrically connected to the control panel 16.

[0087] The working principle of the above technical solution is as follows: the operation and stop of the flexographic printing press can be controlled through the control panel 16.

[0088] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A flexographic printing press, characterized in that, It includes an unwinding component and a rewinding component. The unwinding component is located at the front end of the frame (8), and the rewinding component is located at the rear end of the frame (8). A primary printing component (14) and a secondary printing component (15) are arranged vertically inside the frame (8). A dust removal component is located inside the frame (8) between the unwinding component and the primary printing component (14). The primary printing component (14) includes a housing (1401), which is fixed on the frame (8). The bottom of the housing (1401) is provided with an ink groove (1402). An anilox roller (1403) is rotatably connected inside the housing (1401). A doctor blade (1404) is provided on the side of the anilox roller (1403). The doctor blade (1404) is fixed on the housing (1401) by a fixing screw (1405). Arc grooves (1406) are provided on both sides of the housing (1401). A roller bracket is slidably connected inside the arc groove (1406). A printing plate roller is rotatably connected inside the roller bracket. A pressure cap (1413) is inserted into the housing (1401). The pressure cap (1413) is pressed and fixed on the housing (1401) by a pressure plate (1414). A spring (1415) is provided between the housing (1401) and the pressure plate (1414). The roller support includes an end piece (1410), which slides in the arc groove (1406). The end of the end piece (1410) is threadedly connected to a fixing nut (1411), and the roller support is rotatably connected inside the end piece (1410). The printing cylinder includes an inner column (1407), which rotates within an end sleeve (1410). The end of the inner column (1407) is connected to the output end of a motor (1412), which is fixed to the end sleeve (1410). A sleeve (1408) is fitted on the outside of the inner column (1407), and a flexographic printing mold (1409) is provided on the outside of the sleeve (1408). The secondary printing component (15) includes a housing (1501), which is located above the housing (1401) and fixed to the frame (8). The bottom of the housing (1501) is provided with an ink trough (1502). An anilox roller (1506) is rotatably connected inside the housing (1501). A scraper (1503) is provided on the side of the anilox roller (1506). The scraper (1503) is fixed to the housing (1501) by a fixing screw. Arc grooves (1507) are provided at both ends of the housing (1501). The arc groove (1507) is slidably connected to the end sleeve (1512). The end of the end sleeve (1512) is threadedly connected to the fixing nut (1513). The end sleeve (1512) is rotatably connected to the inner column (1509). The inner column (1509) is covered with a sleeve (1510). The sleeve (1510) is covered with a flexographic printing mold (1511). The inner column (1509) is connected to the output end of the motor (1514). The motor (1514) is fixed on the end sleeve (1512). A pressure cap (1515) is inserted into the housing (1501). The pressure cap (1515) is pressed and fixed onto the housing (1501) by a pressure plate (1516). A spring (1517) is provided between the housing (1501) and the pressure plate (1516). The lower end of housing 1 (1501) is rotatably connected to guide roller 5 (1508), and the side of housing 1 (1501) is rotatably connected to impression roller 3 (1504). Impression roller 3 (1504) is connected to the output end of motor 7 (1505), and motor 7 (1505) is fixed on housing 1 (1501).

2. The flexographic printing press according to claim 1, characterized in that, The unwinding component includes two support arms (1), one end of each support arm (1) is rotatably connected to the frame (8), and the other end of each support arm (1) is provided with a limiting component. The limiting component limits the printing material roll (2) to the opening at the end of the support arm (1). The limiting component and the support arm (1) are rotatably connected to the printing material roll (2).

3. A flexographic printing press according to claim 2, characterized in that, The limiting component includes a bracket (3), which is fixed on the support arm (1). A slider (5) is slidably connected inside the bracket (3). A spring (4) is provided between the bracket (3) and the slider (5). A rotating wheel (6) is rotatably connected inside the bracket (3). The slider (5) is engaged in the opening on the rotating wheel (6). The printing material roll (2) is rotatably connected to the rotating wheel (6).

4. A flexographic printing press according to claim 3, characterized in that, The frame (8) is fixedly connected to the cylinder (7). The output end of the cylinder (7) is connected to the support arm (1). Two guide rollers (9) are rotatably connected between the two support arms (1). A guide roller (10) is fixed between the two support arms (1). The printing material pulled out from the printing material roll (2) enters the dust removal component through the two guide rollers (9) and the guide roller (10).

5. A flexographic printing press according to claim 1, characterized in that, The dust removal component includes two upper dust removal wheels (11) and two lower dust removal wheels (12). The two upper dust removal wheels (11) are located on the upper side of the printing material, and the two lower dust removal wheels (12) are located on the lower side of the printing material. The ends of the two upper dust removal wheels (11) are connected by a belt drive, and the ends of the two lower dust removal wheels (12) are connected by a belt drive. The end of one of the upper dust removal wheels (11) is connected by a gear meshing drive with the end of the lower dust removal wheel (12) directly below it. One of the lower dust removal wheels (12) is driven by a motor (13), which is fixed on the outer wall of the frame (8).

6. A flexographic printing press according to claim 5, characterized in that, The frame (8) is rotatably connected to two guide rollers (17), and the frame (8) is rotatably connected to an impression roller (18) and an impression roller (29). The end of the impression roller (18) is connected to a motor (24), and the end of the impression roller (29) is connected to a motor (25). Both the motor (24) and the motor (25) are fixed on the outer wall of the frame (8). The printing material passes through the two guide rollers (17), is printed once between the first printing component (14) and the first impression roller (18), and is printed a second time between the second printing component (15) and the second impression roller (19).

7. A flexographic printing press according to claim 6, characterized in that, The frame (8) is rotatably connected to two guide rollers (20). The printing material passing between the two guide rollers (20) is dried by two sets of hot air blowers (21). The two sets of hot air blowers (21) are respectively installed on both sides of the inner wall of the frame (8). The winding component includes a winding support arm (22), one end of which is fixed to the frame (8), and the other end of the frame (8) is provided with a groove. A winding drum (23) is rotatably connected in the groove. The dried printing material is wound on the winding drum (23). The end of the winding drum (23) is connected to a drive motor, and the drive motor is fixed to the winding support arm (22).

8. A method for operating a flexographic printing press, applicable to the flexographic printing press according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Install the printing material roll (2) on the unwinding component. The printing material pulled out from the printing material roll (2) enters the dust removal component through two guide rollers (9) and guide roller (10). S2. The dust removal component cleans the upper and lower surfaces of the printing material. After cleaning, the printing material passes through two guide rollers (17), then passes between the printing component (14) and the impression roller (18) for a first printing, and then passes between the printing component (15) and the impression roller (19) for a second printing. S3. After printing, the substrate is dried by a hot air blower (21) and then wound up by a winding component.

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