A rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine

Abstract

This utility model discloses a rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine, including a rotating roller and a printing plate roller. The outer wall of the rotating roller is fitted with the printing plate roller, and a cavity is formed inside the rotating roller. A driving component is disposed inside the cavity, and a mounting slot is provided at the top of the driving component. A positioning baffle is sleeved on the outer wall of the rotating roller, and an insertion hole is formed inside the positioning baffle, into which a fixing pin is inserted. A clamping component is disposed on the inner side of the positioning baffle. This positioning mechanism, through the coordinated cooperation of the driving component, the positioning baffle, and the clamping component, can quickly complete the axial positioning and radial clamping and limiting of the printing plate roller on the rotating roller. The positioning baffle can directly restrict the movement of the printing plate roller along the axial direction of the rotating roller, effectively avoiding the offset of the printed pattern caused by the axial movement of the printing plate roller during printing. Simultaneously, the clamping component, through the tight fit of the anti-slip pad with the printing plate roller, achieves stable radial limiting of the printing plate roller.

Description

Technical Field

[0001] This utility model relates to the field of printing press plate roller positioning technology, specifically a rapid positioning mechanism for printing plate rollers of a four-color circular film printing machine. Background Technology

[0002] In the four-color circular film printing process, the printing roller is one of the core components that determines the accuracy and quality of the printed pattern. Its installation and positioning accuracy on the printing press roller directly affects the pass rate of printed products. As the packaging and printing industries continue to increase their requirements for product accuracy, the positioning efficiency and accuracy of the printing roller have become increasingly important factors restricting production efficiency and product quality.

[0003] Currently, the printing roller installation and positioning structure of existing four-color rotary film printing machines generally suffers from technical defects such as cumbersome positioning operations and difficulty in guaranteeing positioning accuracy. Traditional printing roller positioning methods mostly rely on manual alignment and installation with the help of auxiliary measuring tools. During the installation process, multiple operators need to work together to repeatedly adjust the axial position and circumferential angle of the printing roller. This not only involves cumbersome and time-consuming operations, which seriously affects production preparation efficiency and increases labor costs, but also makes it easy for the positioning method to be affected by subjective factors such as the operator's experience and skill level, making it difficult to achieve accurate positioning of the printing roller and easily causing problems such as axial movement gap or circumferential positioning deviation of the printing roller. Utility Model Content

[0004] The purpose of this invention is to provide a rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine, comprising a rotating roller and a printing plate roller. The outer wall of the rotating roller is provided with a printing plate roller, and the interior of the rotating roller is provided with a cavity. A driving component is provided inside the cavity, and a mounting slot is provided at the top of the driving component. A positioning baffle is sleeved on the outer wall of the rotating roller, and an insertion hole is provided inside the positioning baffle. A fixing pin is inserted into the insertion hole, and a clamping component is provided on the inner side of the positioning baffle.

[0006] Preferably, a through hole is provided on the left side of the internal cavity of the rotating roller, and a driving block is provided at the end of the through hole. The driving block is connected to the driving assembly through a connecting rod.

[0007] Preferably, the outer wall of the drive block has a diamond-shaped groove for rotating it using a tool.

[0008] Preferably, the driving assembly includes a screw, which is rotatably connected inside the cavity of the rotating roller. A transmission rod is fixedly connected to the inner side of the screw on both sides. A threaded block is threadedly connected to the outer wall of the screw. A limit block is fixedly connected to the bottom end of the threaded block, and the limit block is slidably connected to the rotating roller.

[0009] Preferably, the top end of the threaded block is connected to the mounting groove block, and an interlocking threaded hole is provided at the center of the top end of the mounting groove block for connecting the fixing pin.

[0010] Preferably, the clamping assembly includes a support block, which is fixedly connected to the inner side of the positioning baffle, and the inner side of the support block is detachably provided with an anti-slip pad.

[0011] Preferably, the anti-slip mat is made of metal and has a wave pattern on its inner wall for anti-slip purposes.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This positioning mechanism, through the coordinated operation of the drive component, positioning baffle, and clamping component, can quickly complete the axial positioning and radial clamping limit of the printing roller on the rotating roller. The positioning baffle can directly restrict the movement of the printing roller along the axial direction of the rotating roller, effectively avoiding the offset of the printed pattern caused by the axial movement of the printing roller during the printing process. At the same time, the clamping component achieves stable radial limit of the printing roller through the tight fit of the anti-slip pad with the printing roller, preventing the circumferential rotation offset of the printing roller. The dual positioning ensures the coaxiality and stability of the printing roller installation, significantly improves the pattern accuracy of four-color circular film printing, and reduces the printing defect rate.

[0013] This mechanism adopts a modular installation and drive design. The operator only needs to attach the printing roller to the rotating roller and use the fixing pin to quickly complete the initial fixation of the positioning baffle and the mounting slot. Then, by using a tool to rotate the drive block, the positioning baffle and the clamping component will move synchronously through the screw drive to complete the precise positioning of the printing roller. The whole operation process is simple and easy to understand, with few steps and short time consumption. Compared with the complicated adjustment and fixing methods of traditional positioning mechanisms, it greatly improves the efficiency of printing roller replacement and positioning, reduces the professional skills required of operators, and effectively saves labor costs and production preparation time.

[0014] The drive assembly uses a transmission rod to rigidly connect the two screws, ensuring that they rotate synchronously. This, in turn, drives the threaded blocks and mounting slot blocks on both sides to move synchronously, making the clamping and positioning force of the positioning baffle on the printing roller uniform and symmetrical. This prevents the printing roller from shifting or being damaged due to uneven force on one side. At the same time, the limiting block at the bottom of the threaded block slides with the rotating roller, strictly limiting the movement direction of the threaded block. This ensures that the threaded block only moves in a straight line along the screw axis, preventing the threaded block from rotating synchronously with the screw and affecting the transmission accuracy. This ensures the consistency and reliability of each positioning operation, and improves the service life and operational stability of the mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Detailed view of the connection structure in cross-section; Figure 3 for Figure 2 A magnified view of the connection structure details in the middle section; Figure 4 for Figure 2 Detailed view of the connection structure in a side cross-section.

[0016] In the diagram: 1. Rotating roller, 2. Printing roller, 3. Screw, 4. Transmission rod, 5. Threaded block, 6. Limiting block, 7. Mounting groove block, 8. Positioning baffle, 9. Fixing pin, 10. Support block, 11. Anti-slip pad, 12. Drive block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4This utility model provides a technical solution for a rapid positioning mechanism for the printing plate roller of a four-color rotary film printing machine: A rapid positioning mechanism for the printing plate roller of a four-color rotary film printing machine includes a rotating roller 1 and a printing roller 2. The rotating roller 1 serves as the core supporting body of the entire positioning mechanism, providing mounting support for components such as the printing roller 2, drive assembly, and positioning baffle 8, transmitting power to the main shaft of the printing machine, and driving the printing roller 2 to rotate synchronously. The printing roller 2 is mounted on the outer wall of the rotating roller 1, and a cavity is opened inside the rotating roller 1. The drive assembly is installed inside the cavity, and an installation slot 7 is provided at the top of the drive assembly. The installation slot 7 is used to provide an installation position for the positioning baffle 8, thereby indirectly achieving a rapid positioning effect for the printing roller 2. The positioning baffle 8 is sleeved on the outer wall of the rotating roller 1. The inside of the plate roller 1 has an insertion hole, and a fixing pin 9 is inserted into the insertion hole. The fixing pin 9 is used to connect the positioning baffle 8 and the mounting slot block 7. After the positioning baffle 8 and the mounting slot block 7 are connected, the threaded block 5 can clamp and limit the plate roller 2 by the clamping component when it moves inward. The positioning baffle 8 realizes the axial positioning of the plate roller 2 and restricts the movement of the plate roller 2 along the axis of the rotating roller 1, so as to avoid the axial movement of the plate roller 2 during the printing process, which would cause the printed pattern to shift. The inner side of the positioning baffle 8 is provided with a clamping component. The left side of the cavity inside the rotating roller 1 has a through hole. The end of the through hole is provided with a driving block 12. The driving block 12 is connected to the driving component through a connecting rod. The outer wall of the driving block 12 has a diamond-shaped groove for rotating it with a tool.

[0019] The drive assembly includes a screw 3, which is rotatably connected inside the cavity of the rotating roller 1. The screw 3 serves as the core of the drive assembly's power transmission, driving the threaded block 5 to move linearly through its own rotation. A transmission rod 4 is fixedly connected to the inner side of both screws 3, providing a rigid connection between the two screws 3 and ensuring synchronous rotation. A threaded block 5 is threadedly connected to the outer wall of the screw 3, converting the rotational motion of the screw 3 into its own linear motion, driving the mounting slot block 7 to move synchronously. A limit block 6 is fixedly connected to the bottom end of the threaded block 5, and the limit block 6 is slidably connected to the rotating roller 1. The limit block 6 has a core limiting and guiding function, strictly limiting the movement direction of the threaded block 5 through its cooperation with the T-shaped guide groove, ensuring that the threaded block 5 only moves linearly along the axial direction of the screw 3, and preventing the threaded block 5 from rotating synchronously with the screw 3. The top end of the threaded block 5 is connected to the mounting slot block 7, and an interlocking threaded hole is opened at the center of the top end of the mounting slot block 7 for connecting the fixing pin 9.

[0020] The clamping assembly includes a support block 10, which is fixedly connected to the inner side of the positioning baffle 8. The support block 10 provides an installation support base for the anti-slip pad 11. The anti-slip pad 11 is detachably provided on the inner side of the support block 10. The anti-slip pad 11 is made of metal and has a wave pattern for anti-slip processing on its inner wall side.

[0021] Working Principle: When using the rapid positioning mechanism of the printing plate roller of a four-color rotary film printing machine, the operator attaches the printing plate roller 2 to the outer wall of the rotating roller 1, then attaches the positioning baffle 8 to the outer wall of the rotating roller 1, aligning its position with the mounting slot 7. After alignment, the fixing pin 9 is inserted from above the positioning baffle 8. After insertion, the drive block 12 is connected to the mounting block 7 via threaded engagement. After fixing the positioning baffle 8, the operator rotates the drive block 12 using a tool. This rotation drives the screw 3 to rotate simultaneously. Through the transmission rod 4 on the inner side of the screw 3, both sides of the screw 3 rotate simultaneously. When the screw 3 rotates, the threaded block 5 connected to its outer wall converts the rotational motion of the screw 3 into its own linear motion. Simultaneously, the limiting block 6 at the bottom of the threaded block 5 slides with the rotating roller 1, restricting the threaded block 5 to only move linearly along the axial direction of the screw 3, preventing the threaded block 5 from rotating synchronously with the screw 3. The mounting slot 7 connected to the top of the threaded block 5 moves synchronously with the threaded block 5, thereby driving the subsequently installed positioning baffle 8 to move inward to position the printing plate roller 2.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine, comprising a rotating roller (1) and a printing plate roller (2), wherein the printing plate roller (2) is disposed on the outer wall of the rotating roller (1), characterized in that, The rotating roller (1) has a cavity inside, and a driving component is provided inside the cavity. The top of the driving component is provided with a mounting slot (7). A positioning baffle (8) is sleeved on the outer wall of the rotating roller (1). An insertion hole is provided inside the positioning baffle (8), and a fixing pin (9) is inserted into the insertion hole. A clamping component is provided on the inner side of the positioning baffle (8).

2. The rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine according to claim 1, characterized in that, The rotating roller (1) has a through hole on the left side of its internal cavity, and a driving block (12) is provided at the end of the through hole. The driving block (12) is connected to the driving assembly through a connecting rod.

3. The rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine according to claim 2, characterized in that, The outer wall of the drive block (12) is provided with a diamond-shaped groove for rotating it by means of a tool.

4. The rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine according to claim 1, characterized in that, The drive assembly includes a screw (3), which is rotatably connected inside the cavity of the rotating roller (1). A transmission rod (4) is fixedly connected to the inner side of the screw (3) on both sides. A threaded block (5) is threadedly connected to the outer wall of the screw (3). A limit block (6) is fixedly connected to the bottom end of the threaded block (5), and the limit block (6) is slidably connected to the rotating roller (1).

5. The rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine according to claim 4, characterized in that, The top end of the threaded block (5) is connected to the mounting groove block (7), and an occasional threaded hole is opened at the center of the top end of the mounting groove block (7) for connecting the fixing pin (9).

6. The rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine according to claim 1, characterized in that, The clamping assembly includes a support block (10), which is fixedly connected to the inner side of the positioning baffle (8), and the inner side of the support block (10) is detachably provided with an anti-slip pad (11).

7. The rapid positioning mechanism for the printing plate roller of a four-color circular film printing machine according to claim 6, characterized in that, The anti-slip mat (11) is made of metal and has a wave pattern on the inner wall side for anti-slip purposes.

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