Packing box offset press with function of quickly replacing printing plate

Abstract

The utility model discloses a packaging box offset press with a function of quickly replacing a printing plate, relates to the technical field of packaging box offset printing, and aims to solve the problems that a large amount of time is occupied and the production efficiency is influenced due to frequent replacement of the printing plate, the packaging box offset press comprises an offset press shell, and a printing table is arranged below the offset press shell. A printing plate locking assembly is arranged between the printing table and the offset press shell and comprises a motor frame, a driving motor is fixedly connected to the inner side of the motor frame, a power output shaft of the driving motor is connected with a rotating screw through a coupler, and symmetrical limiting frames are arranged in front of the driving motor. The packing box offset press with the function of quickly replacing the printing plate has the advantages that the printing plate cannot deviate in the printing process, the stability of printing quality is guaranteed, manual operation is reduced, the efficiency of replacing the printing plate is improved, and the production cost is reduced. And meanwhile, the occurrence probability of the problems of inaccurate printing plate installation and the like caused by manual operation errors is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of offset printing for packaging boxes, in particular to an offset printing machine for packaging boxes with the function of quickly replacing printing plates. Background Art

[0002] The offset printing machine for packaging boxes is a lithographic printing press used for printing packaging boxes. Its working principle is a printing process that uses a flexible printing plate and transfers ink through an anilox roll, belonging to a type of relief printing, abbreviated as flexographic printing.

[0003] The existing device cannot ensure the stable position of the printing plate during printing, resulting in frequent offset of the printing plate, seriously affecting the printing quality, relying heavily on manual operation, with low efficiency in replacing the printing plate, and frequent problems of installation deviation of the printing plate caused by improper manual operation. Content of the Utility Model

[0004] The utility model discloses an offset printing machine for packaging boxes with the function of quickly replacing printing plates, aiming to solve the technical problems of difficult stability and frequent offset of the printing plate position, affecting the printing quality, a large amount of manual operation, low efficiency in replacing plates, and frequent problems of installation deviation.

[0005] To achieve the above object, the utility model adopts the following technical scheme: an offset printing machine for packaging boxes with the function of quickly replacing printing plates, including an offset printing machine housing. A printing table is arranged below the offset printing machine housing. An printing plate locking component is arranged between the printing table and the offset printing machine housing. The printing plate locking component includes a motor frame. A driving motor is fixedly connected to the inner side of the motor frame. The power output shaft of the driving motor is connected to a rotating screw through a coupling. Two limiting frames are arranged in front of the driving motor. The outer sides of both ends of the rotating screw are movably connected to the inner side of one of the limiting frames. The inner sides of both ends of the other limiting frame are fixedly connected with auxiliary round rods. A sliding plate is movably connected to the outer sides of the auxiliary round rods and the rotating screw. A retaining plate is fixedly connected to the end of the limiting frame away from the driving motor. A symmetric retaining frame is fixedly connected to the top of the retaining plate. Symmetric front plates are fixedly connected to the front ends of the retaining frame and the sliding plate. Buffer springs are fixedly connected to the front ends of the front plates. One ends of the buffer springs on the same side are fixedly connected to the same pressing plate.

[0006] By providing a printing table and a plate locking component, when clamping both sides of the plate during plate replacement, the plate is placed in a proper position. The driving motor drives the rotating screw to rotate, and the rotation of the rotating screw generates a force along its axial direction. Under the action of the force generated by the rotation of the rotating screw, the sliding plate starts to move along the auxiliary round rod and the rotating screw. Since the sliding plate is movably connected to both the auxiliary round rod and the rotating screw at the same time, it can move smoothly along the direction defined by the auxiliary round rod under the drive of the rotating screw. While the sliding plate moves forward, it drives the front plate fixedly connected to its front end to move together. The front plate then pushes the buffer spring forward. As the sliding plate continues to move, the buffer spring is compressed. When the pressing plate contacts both sides of the plate, the buffer spring continues to be compressed, generating an elastic force, so that the pressing plate tightly clamps both sides of the plate, completing the locking and fixing action of the plate. During the process, the position of the pressing plate can be accurately controlled, and both sides of the plate can be accurately clamped, ensuring that the plate will not shift in position during printing, guaranteeing the stability of printing quality, reducing manual operation, improving the efficiency of plate replacement, and at the same time reducing the occurrence probability of problems such as inaccurate plate installation caused by manual operation errors.

[0007] In a preferred solution, printing frames are fixedly connected to both sides of the printing table. Fixed frames are fixedly connected to both sides of the printing frames, and a plate replacement frame is fixedly connected to the opposite sides of the fixed frames. A connecting frame is fixedly connected to the bottom end of the plate replacement frame. Both ends of the connecting frame are fixedly connected to the top end of the limiting frame. And a plurality of positioners are fixedly connected to the inner side of the plate replacement frame. The positioners are located above the plate locking component. A plate storage frame is fixedly connected to the top end of the plate replacement frame. And a plurality of plates are arranged inside the plate storage frame. The plates are located behind the plate locking component.

[0008] In a preferred solution, a replacement component is arranged inside the plate replacement frame. The replacement component includes a replacement part. A rectangular hole is arranged on the replacement part. The rectangular hole is located above the plate locking component. And a plurality of positioners are all located directly above the four sides of the rectangular hole. The plate is located behind the rectangular hole. The bottom end of the plate is in contact with the top end of the replacement part. Slide groove holes are formed on both sides of the plate replacement frame. A connecting plate is fixedly connected to the side of the replacement part close to the driving motor. The outer wall of the connecting plate slides inside the slide groove hole on the side close to the driving motor. A telescopic driving rod is fixedly connected to the front end of the connecting plate. And a connecting part is fixedly connected to the outside of the telescopic driving rod. One side of the connecting part is fixedly connected to the outside of the plate replacement frame. A fixed rod is fixedly connected to the side of the replacement part away from the driving motor. The outer wall of the fixed rod slides inside the slide groove hole on the side away from the driving motor. And a roller is movably connected to the outside of the fixed rod. The outside of the roller is slidably connected to a slide groove frame. One side of the slide groove frame is fixedly connected to one side of the plate replacement frame.

[0009] By setting up a replacement component, when replacing the printing plate, the printing plates are placed in the printing plate storage rack in sequence. The bottom end of the lowermost printing plate contacts the top end of the replacement part, which is located behind the rectangular hole of the replacement part. The remaining printing plates are stacked in sequence above it. When the printing plate needs to be replaced, the telescopic drive rod is activated and starts to contract. Therefore, when the telescopic drive rod contracts, it will push the connecting plate. The connecting plate is fixedly connected to the replacement part, and then drives the replacement part to slide in the printing plate replacement rack along the sliding groove hole in the direction close to the drive motor. During the sliding process of the replacement part, the rectangular hole moves accordingly. The lowermost printing plate is located in the rectangular hole. At this time, multiple positioners are located directly above the four sides of the rectangular hole, playing a preliminary positioning role for the printing plate to ensure the accurate position of the printing plate in the rectangular hole. At this time, the remaining printing plates move downward due to the action of gravity, and the lowermost printing plate contacts the top end of the replacement part again, preparing for the next printing plate replacement. During the process, the automation of the printing plate replacement process is realized, manual intervention is reduced, the replacement efficiency is improved, and the probability of human error is reduced.

[0010] As can be seen from the above, a carton offset printing machine with the function of quickly replacing the printing plate provided by the present utility model has the technical effects of ensuring that the printing plate will not shift in position during the printing process, guaranteeing the stability of the printing quality, reducing manual operations, improving the efficiency of printing plate replacement, and at the same time reducing the occurrence probability of problems such as inaccurate installation of the printing plate caused by manual operation errors. Brief Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the overall structure of a carton offset printing machine with the function of quickly replacing the printing plate proposed by the present utility model;

[0012] Figure 2 It is a schematic diagram of the rear structure of the printing plate replacement rack of a carton offset printing machine with the function of quickly replacing the printing plate proposed by the present utility model;

[0013] Figure 3 It is a schematic diagram of the bottom structure of the printing plate replacement rack of a carton offset printing machine with the function of quickly replacing the printing plate proposed by the present utility model;

[0014] Figure 4 It is a schematic diagram of the structure of the printing plate locking component of a carton offset printing machine with the function of quickly replacing the printing plate proposed by the present utility model;

[0015] Figure 5 It is a schematic diagram of the structure of the replacement component of a carton offset printing machine with the function of quickly replacing the printing plate proposed by the present utility model.

[0016] In the attached drawings: 1, printing table; 2, printing frame; 3, fixing frame; 4, plate replacement frame; 5, printing plate; 6, printing plate storage rack; 7, printing plate locking assembly; 701, motor frame; 702, driving motor; 703, rotating screw; 704, limiting frame; 705, auxiliary round rod; 706, sliding plate; 707, retaining plate; 708, retaining frame; 709, front plate; 710, buffer spring; 711, pressing and fixing plate; 8, connecting frame; 9, replacement assembly; 901, replacement part; 902, connecting plate; 903, telescopic driving rod; 904, connecting part; 905, fixing rod; 906, roller; 907, sliding groove frame; 10, locator; 11, offset printing machine housing. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0018] An offset printing machine for packaging boxes with a function of quickly replacing printing plates disclosed by the present invention is mainly applied to scenarios where the position of the printing plate in the existing device is difficult to stabilize, frequently shifts, affecting the printing quality, there are many manual operations, the plate replacement efficiency is low, and installation deviation problems occur frequently.

[0019] Referring to Figures 1 - 5 , an offset printing machine for packaging boxes with a function of quickly replacing printing plates includes an offset printing machine housing 11. A printing table 1 is provided below the offset printing machine housing 11. A printing plate locking assembly 7 is provided between the printing table 1 and the offset printing machine housing 11. The printing plate locking assembly 7 includes a motor frame 701. A driving motor 702 is connected to the inside of the motor frame 701 by bolts. The power output shaft of the driving motor 702 is connected to a rotating screw 703 through a coupling. Two limiting frames 704 are provided in front of the driving motor 702. The outer ends of both sides of the rotating screw 703 are rotatably connected to the inside of one of the limiting frames 704. The inner ends of both sides of the other limiting frame 704 are connected to an auxiliary round rod 705 by bolts. A sliding plate 706 is slidably connected to the outer sides of the auxiliary round rod 705 and the rotating screw 703. One end of the limiting frame 704 away from the driving motor 702 is connected to a retaining plate 707 by bolts. Symmetrical retaining frames 708 are connected to the top of the retaining plate 707 by bolts. Symmetrical front plates 709 are connected to the front ends of the retaining frames 708 and the front end of the sliding plate 706 by bolts. Buffer springs 710 are connected to the front ends of the front plates 709 by bolts. One ends of the buffer springs 710 on the same side are connected to the same pressing and fixing plate 711 by bolts.

[0020] Referring to Figure 2 , Figure 3 and Figure 4, in a preferred embodiment, printing frames 2 are connected to both sides of the printing table 1 by bolts, fixing frames 3 are connected to both sides of the printing frames 2 by bolts, and a plate changing frame 4 is connected to the opposite sides of the fixing frames 3 by bolts. A connecting frame 8 is connected to the bottom end of the plate changing frame 4 by bolts, and both ends of the connecting frame 8 are connected to the top end of the limiting frame 704 by bolts. A plurality of positioners 10 are connected to the inner side of the plate changing frame 4 by bolts. The positioners 10 are located above the plate locking assembly 7. A plate storage rack 6 is connected to the top end of the plate changing frame 4 by bolts, and a plurality of printing plates 5 are arranged inside the plate storage rack 6. The printing plates 5 are located behind the plate locking assembly 7.

[0021] Referring to Figure 2 , Figure 3 and Figure 5 , in a preferred embodiment, a changing assembly 9 is arranged inside the plate changing frame 4. The changing assembly 9 includes a changing part 901. A rectangular hole is arranged on the changing part 901. The rectangular hole is located above the plate locking assembly 7, and a plurality of positioners 10 are all located directly above the four sides of the rectangular hole. The printing plate 5 is located behind the rectangular hole, and the bottom end of the printing plate 5 is in contact with the top end of the changing part 901. Chute holes are formed on both sides of the plate changing frame 4. A connecting plate 902 is connected to the side of the changing part 901 close to the driving motor 702 by bolts. The outer wall of the connecting plate 902 slides inside the chute hole on the side close to the driving motor 702. A telescopic driving rod 903 is connected to the front end of the connecting plate 902 by bolts, and a connecting part 904 is connected to the outer side of the telescopic driving rod 903 by bolts. One side of the connecting part 904 is connected to the outer side of the plate changing frame 4 by bolts. A fixing rod 905 is connected to the side of the changing part 901 far from the driving motor 702 by bolts. The outer wall of the fixing rod 905 slides inside the chute hole on the side far from the driving motor 702, and a roller 906 is rotatably connected to the outer side of the fixing rod 905. The outer side of the roller 906 is slidably connected to a sliding groove frame 907. One side of the sliding groove frame 907 is connected to the side of the plate changing frame 4 by bolts.

[0022] Working principle: When clamping both sides of the printing plate during printing plate replacement, the printing plate is placed in a proper position. The driving motor 702 drives the rotating screw 703 to rotate. The rotation of the rotating screw 703 generates a force along its axial direction. Under the action of the force generated by the rotation of the rotating screw 703, the sliding plate 706 starts to move along the auxiliary circular rod 705 and the rotating screw 703. Since the sliding plate 706 is movably connected to both the auxiliary circular rod 705 and the rotating screw 703 at the same time, it can move smoothly along the direction defined by the auxiliary circular rod 705 under the drive of the rotating screw 703. While the sliding plate 706 moves forward, it drives the front plate 709 fixedly connected to its front end to move together. The front plate 709 then pushes the buffer spring 710 forward. As the sliding plate 706 continues to move, the buffer spring 710 is compressed. When the pressing plate 711 contacts both sides of the printing plate, the buffer spring 710 continues to be compressed, generating an elastic force, so that the pressing plate 711 tightly clamps both sides of the printing plate, completing the locking and fixing action of the printing plate; during printing plate replacement, the printing plates 5 are placed in the printing plate storage rack 6 in sequence. The bottom end of the lowermost printing plate 5 contacts the top end of the replacement part 901 and is located behind the rectangular hole of the replacement part 901. The remaining printing plates 5 are stacked in sequence above it. When the printing plate needs to be replaced, the telescopic drive rod 903 is activated and starts to contract. Therefore, when the telescopic drive rod 903 contracts, it will push the connecting plate 902. The connecting plate 902 is fixedly connected to the replacement part 901, thereby driving the replacement part 901 to slide along the chute hole in the printing plate replacement rack 4 in the direction close to the driving motor 702. During the sliding process of the replacement part 901, the rectangular hole moves accordingly. The lowermost printing plate 5 is located in the rectangular hole. At this time, multiple positioners 10 are located directly above the four sides of the rectangular hole, playing a preliminary positioning role for the printing plate 5 to ensure the accurate position of the printing plate 5 in the rectangular hole. At this time, the remaining printing plates 5 move downward due to the action of gravity, and the lowermost printing plate 5 contacts the top end of the replacement part 901 again, preparing for the next printing plate replacement.

[0023] As described above, it is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be the substitution of some structures, devices, method steps, or a complete technical solution. Any equivalent substitution or change made according to the technical solution of the present invention and its inventive concept should be covered within the protection scope of the present invention.

Claims

1. A carton offset printing machine with a function of quickly replacing printing plates, including an offset printing machine housing (11), characterized in that, Below the offset printing machine housing (11) is provided a printing table (1). Between the printing table (1) and the offset printing machine housing (11) is provided a plate locking assembly (7). The plate locking assembly (7) includes a motor frame (701). Inside the motor frame (701) is fixedly connected a driving motor (702). And the power output shaft of the driving motor (702) is connected to a rotating screw rod (703) through a coupling. In front of the driving motor (702) are provided two limiting frames (704). The outer sides of both ends of the rotating screw rod (703) are movably connected to the inside of one of the limiting frames (704). And fixedly connected to the inside of both ends of the other limiting frame (704) are auxiliary round rods (705). A sliding plate (706) is movably connected to the outer sides of the auxiliary round rods (705) and the rotating screw rod (703). One end of the limiting frame (704) away from the driving motor (702) is fixedly connected to a retaining plate (707). At the top of the retaining plate (707) are fixedly connected symmetric retaining frames (708). At the front ends of the retaining frames (708) and the sliding plate (706) are fixedly connected symmetric front plates (709). And at the front ends of the front plates (709) are fixedly connected buffer springs (710). One ends of the buffer springs (710) on the same side are fixedly connected to the same pressing and retaining plate (711).

2. The offset printing machine for packaging boxes with the function of quickly replacing printing plates according to claim 1, characterized in that, On both sides of the printing table (1) are fixedly connected printing frames (2). On both sides of the printing frames (2) are fixedly connected fixing frames (3). And on the opposite sides of the fixing frames (3) are fixedly connected plate replacement frames (4).

3. The offset printing machine for packaging boxes with the function of quickly replacing printing plates according to claim 2, characterized in that, At the bottom end of the plate replacement frame (4) is fixedly connected a connecting frame (8). The two ends of the connecting frame (8) are fixedly connected to the top ends of the limiting frames (704). And inside the plate replacement frame (4) are fixedly connected a plurality of positioners (10). The positioners (10) are located above the plate locking assembly (7).

4. A carton offset printing machine with the function of quickly replacing printing plates according to claim 2, characterized in that, At the top end of the plate replacement frame (4) is fixedly connected a plate storage rack (6). And inside the plate storage rack (6) are provided a plurality of plates (5). The plates (5) are located behind the plate locking assembly (7).

5. A carton offset printing machine with a function of quickly replacing printing plates according to claim 4, characterized in that, Inside the plate replacement frame (4) is provided a replacement assembly (9). The replacement assembly (9) includes a replacement part (901). On the replacement part (901) is provided a rectangular hole. The rectangular hole is located above the plate locking assembly (7). And a plurality of positioners (10) are all located directly above the four sides of the rectangular hole. The plates (5) are located behind the rectangular hole. The bottom end of the plates (5) is in contact with the top end of the replacement part (901).

6. The offset printing machine for packaging boxes with the function of quickly replacing printing plates according to claim 5, characterized in that, On both sides of the plate replacement frame (4) are provided chute holes. On the side of the replacement part (901) close to the driving motor (702) is fixedly connected a connecting plate (902). The outer wall of the connecting plate (902) slides inside the chute hole on the side close to the driving motor (702). At the front end of the connecting plate (902) is fixedly connected a telescopic driving rod (903). And on the outer side of the telescopic driving rod (903) is fixedly connected a connecting part (904). One side of the connecting part (904) is fixedly connected to the outer side of the plate replacement frame (4).

7. A carton offset printing machine with the function of quickly replacing printing plates according to claim 6, characterized in that, One side of the replacement part (901) away from the driving motor (702) is fixedly connected with a fixing rod (905). The outer wall of the fixing rod (905) slides inside the chute hole on the side away from the driving motor (702), and a roller (906) is movably connected to the outside of the fixing rod (905). The outside of the roller (906) is slidably connected with a sliding chute frame (907), and a fixed connection is made between one side of the sliding chute frame (907) and one side of the plate changing rack (4).

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