Flexographic printing unit

Abstract

The utility model discloses a flexographic printing unit which comprises an ink box, an ink conveying roller, an anilox roller, a printing roller and a printing roller which are arranged in a matched mode, and is characterized in that the ink conveying roller is in transmission connection with a first motor, the anilox roller is directly connected with the output end of a second motor, and the anilox roller and the second motor are both arranged on a first moving frame. The first moving frame is connected with a first moving driving assembly, the printing roller is directly connected with the output end of a third motor, the printing roller and the third motor are both arranged on a second moving frame, the second moving frame is connected with a second moving driving assembly, and the printing roller is directly connected with the output end of a fourth motor. The plate roller transmission mechanism is simple in structure and reasonable in design, transmission after the plate roller is replaced can be conveniently achieved, and matching among the roller bodies is guaranteed.

Description

Technical Field

[0001] The utility model relates to printing equipment, in particular to a flexographic printing unit. Background Art

[0002] The flexographic printing unit is an important component of the flexographic printing machine. The working principle of the flexographic printing unit is that the ink transport roller delivers the ink in the ink cartridge to the anilox roller, and then the ink is transferred to the printing plate on the plate roller through the anilox roller. When the printing substrate passes between the plate roller and the printing roller, the printing plate prints the pattern on the substrate. In traditional flexographic printing units, the anilox roller, the plate roller and the printing roller are driven by the same motor and the corresponding transmission gear set or synchronous belt drive set, chain assembly and other transmission mechanisms. The defect of this structure is that when the specifications of the plate roller need to be replaced, the distance between the plate roller and the other rollers changes. At this time, the entire set of transmission mechanisms needs to be replaced and debugged, which is very troublesome to operate and the user experience is not good. Utility Model Content

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a flexographic printing unit for solving the above problems.

[0004] To this end, the present invention is implemented by adopting the following scheme:

[0005] A flexographic printing unit comprises an ink cartridge, an ink transport roller, an anilox roller, a plate roller and a printing roller which are arranged in a coordinated manner, and is characterized in that: the ink transport roller is transmission-connected to the first motor, the anilox roller is directly connected to the output end of the second motor, the anilox roller and the second motor are both arranged on a first movable frame, the first movable frame is connected to the first movable drive assembly, the plate roller is directly connected to the output end of the third motor, the plate roller and the third motor are both arranged on a second movable frame, the second movable frame is connected to the second movable drive assembly, and the printing roller is directly connected to the output end of the fourth motor.

[0006] The outer wall of the plate roller is covered with a magnetic layer, a printing plate layer is arranged on the magnetic layer, a first positioning hole is opened on the plate roller, a second positioning hole corresponding to the first positioning hole is arranged on the magnetic layer, and a positioning pin passes through the second positioning hole and is inserted into the first positioning hole.

[0007] The first movable drive assembly includes a first cylinder, the first movable frame is connected to the piston rod of the first cylinder, and the second movable drive assembly includes a second cylinder, and the second movable frame is connected to the piston rod of the second cylinder.

[0008] The two ends of the ink transport roller are rotatably set on the moving block, and the moving block is slidably set in the slide groove on the first moving frame. A spring is tightly pressed between one end of the moving block and the slide groove, and the other end of the moving block is against the adjusting screw. The adjusting screw is screwed on the first moving frame, and the ink transport roller is connected to the first gear, the first gear is meshed with the second gear, and the second gear is connected to the output end of the first motor. The first motor is set on the first moving frame.

[0009] A flexographic printing unit of the above technical solution is equipped with independent motor direct drives corresponding to the anilox roller, plate roller and printing roller, and no additional transmission structure is needed. When the specifications of the plate roller are changed, the positions of the plate roller, anilox roller, etc. can be adjusted directly, so that the anilox roller, plate roller and printing roller can be accurately coordinated for printing. At the same time, there is no need to adjust or replace the transmission mechanism, which makes the replacement operation of the plate roller very simple, ensures the printing quality, and effectively improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model has the following drawings:

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 for Figure 1 A partial enlarged view of the area pointed by A in the middle;

[0013] Figure 3 for Figure 1 Another perspective view after removing the ink cartridge and ink roller;

[0014] Figure 4 for Figure 3 A partial enlarged view of the point where B is pointing;

[0015] Figure 5 This is a structural diagram of the magnetic layer and printing plate layer of the utility model;

[0016] Figure 6 This is a structural diagram of the plate roller of the utility model. DETAILED DESCRIPTION

[0017] As shown in the figure, the utility model discloses a flexographic printing unit, including an ink cartridge 12, an ink transport roller 11, an anilox roller 10, a plate roller 3 and a printing roller 7 that are arranged in conjunction with each other. The ink transport roller 11 is transmission-connected to the first motor 16, the anilox roller 10 is directly connected to the output end of the second motor 9, the anilox roller 10 and the second motor 9 are both arranged on the first movable frame 13, the first movable frame 13 is connected to the first movable drive assembly, the plate roller 3 is directly connected to the output end of the third motor 1, the plate roller 3 and the third motor 1 are both arranged on the second movable frame 2, the second movable frame 2 is connected to the second movable drive assembly, and the printing roller 7 is directly connected to the output end of the fourth motor 8.

[0018] Furthermore, the outer wall of the plate roller 3 is covered with a magnetic layer 4, on which a printing plate layer 5 is provided. The printing plate layer 5 can be connected to the magnetic layer 4 by means of adhesive. A first positioning hole 23 is provided on the plate roller 3, and a second positioning hole 22 corresponding to the first positioning hole 23 is provided on the magnetic layer 4. The positioning pin 6 passes through the second positioning hole 22 and is inserted into the first positioning hole 23. The above structure ensures that the printing plate layer 5 can be magnetically adsorbed on the plate roller 3 through the magnetic layer 4. The provision of the positioning hole and positioning pin structure can achieve precise positioning of the placement of the printing plate layer 5. At the same time, the magnetic layer 4 and the printing plate layer 5 can be directly replaced without changing the plate roller. After replacement, the positioning can be achieved through the positioning hole and positioning pin structure, thereby achieving the function of changing the plate without changing the roller.

[0019] Furthermore, the first movable drive assembly includes a first cylinder 17, and the first movable frame 13 is connected to the piston rod of the first cylinder 17. The second movable drive assembly includes a second cylinder 18, and the second movable frame 2 is connected to the piston rod of the second cylinder 18. With the above structure, the movement of the first and second movable frames can be controlled, so that the anilox roller 10, the plate roller 3, and the printing roller 7 can achieve an elastic press fit.

[0020] Furthermore, both ends of the ink transport roller 11 are rotatably mounted on a movable block 19, which is slidably mounted within a chute on the first movable frame 13. A spring 20 is tightly pressed between one end of the movable block 19 and the chute, and the other end of the movable block 19 abuts against an adjusting screw 21, which is threadedly mounted on the first movable frame 13. The ink transport roller 11 is connected to a first gear 15, which is meshed with a second gear 14. The second gear 14 is connected to the output end of a first motor 16, which is mounted on the first movable frame 13. With the above structure, by controlling the rotation of the adjusting screw 21 to cooperate with the spring 20, the movable block 19 can be driven to move, thereby adjusting the position of the ink transport roller 11. The adjustment operation is very simple.

[0021] When the plate roller 3 needs to be replaced, the first and second cylinders are controlled to drive the first and second movable frames to move, so that the printing roller 7, the plate roller 3 and the anilox roller 10 are separated from each other. Then the plate roller 3 and the third motor 1 can be separated separately, and the plate roller 3 of the required specifications is replaced and directly connected to the output end of the third motor 1. Then the second cylinder 18 is controlled to drive the second movable frame 2 to move, so that the plate roller 3 and the printing roller 7 are pressed together, and the first cylinder 17 is controlled to drive the first movable frame 13 to move, so that the anilox roller 10 and the plate roller 3 are pressed together. The pressing force can be adjusted by adjusting the air pressure of the first and second cylinders.

[0022] This structure of the present invention is that the anilox roller 10, the plate roller 3 and the printing roller 7 are all equipped with independent motor direct-connected drives, and there is no need to set up an additional transmission structure. When the specifications of the plate roller are changed, the positions of the plate roller 3, the anilox roller 10, etc. can be directly adjusted, so that the anilox roller 10, the plate roller 3, and the printing roller 7 can be accurately coordinated for printing. At the same time, there is no need to adjust or replace the transmission mechanism, which makes the replacement operation of the plate roller very simple, ensures the printing quality, and effectively improves the user experience.

Claims

1. A flexographic printing unit comprising an ink cartridge (12), an ink transport roller (11), an anilox roller (10), a plate roller (3) and a printing roller (7) arranged in a coordinated manner, characterized in that: The ink transport roller (11) is connected to the first motor (16) by transmission, the anilox roller (10) is directly connected to the output end of the second motor (9), the anilox roller (10) and the second motor (9) are both arranged on the first movable frame (13), the first movable frame (13) is connected to the first movable drive assembly, the plate roller (3) is directly connected to the output end of the third motor (1), the plate roller (3) and the third motor (1) are both arranged on the second movable frame (2), the second movable frame (2) is connected to the second movable drive assembly, and the printing roller (7) is directly connected to the output end of the fourth motor (8).

2. The flexographic printing unit according to claim 1, characterized in that: The outer wall of the plate roller (3) is covered with a magnetic layer (4), a printing plate layer (5) is provided on the magnetic layer (4), a first positioning hole (23) is provided on the plate roller (3), a second positioning hole (22) corresponding to the first positioning hole (23) is provided on the magnetic layer (4), and a positioning pin (6) passes through the second positioning hole (22) and is inserted into the first positioning hole (23).

3. The flexographic printing unit according to claim 1, characterized in that: The first movable drive assembly includes a first cylinder (17), the first movable frame (13) is connected to the piston rod of the first cylinder (17), and the second movable drive assembly includes a second cylinder (18), and the second movable frame (2) is connected to the piston rod of the second cylinder (18).

4. The flexographic printing unit according to claim 1, characterized in that: The two ends of the ink transport roller (11) are rotatably arranged on the moving block (19), and the moving block (19) is slidably arranged in the slide groove on the first moving frame (13). A spring (20) is tightly pressed between one end of the moving block (19) and the slide groove, and the other end of the moving block (19) is against the adjusting screw (21). The adjusting screw (21) is screwed on the first moving frame (13). The ink transport roller (11) is connected to the first gear (15), the first gear (15) is meshed with the second gear (14), and the second gear (14) is connected to the output end of the first motor (16). The first motor (16) is arranged on the first moving frame (13).

Images