Precise positioning of carton printing devices

Abstract

This utility model discloses a precision positioning device for printing cartons, belonging to the field of printing equipment technology. It aims to solve the problem of unavoidable vibration and friction changes during the conveying of carton boards, which cause subtle changes in their position and posture, affecting printing accuracy. The key technical points are: a device body including a printing plate roller and a printing roller; a fixed frame fixedly connected within the device body; two symmetrical adjusting rollers slidably connected to the inner wall of the fixed frame; movable blocks rotatably connected to both ends of each adjusting roller; a groove for the movable blocks to slide on the inner wall of the fixed frame; and a driving component on the fixed frame for driving the two adjusting rollers to move along the groove. This utility model, through the arrangement of the two adjusting rollers with an infrared transmitter and receiver, ensures that the position of the carton board remains consistent when entering the printing plate roller and printing roller, preventing changes in the carton board's position and improving printing accuracy.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and more specifically, to a precision positioning carton printing device. Background Technology

[0002] Currently, flexographic printing presses widely used in the corrugated box printing industry mainly consist of a paper feeding device, a printing device, and a drying and collecting device. The core of the printing device is the printing cylinder and impression cylinder, which transfer ink onto the surface of the corrugated cardboard via a flexographic plate. These machines typically use belts or rollers to transport the cardboard sheets to achieve automated production.

[0003] In existing technology, cardboard boxes first enter the printing unit via a feed belt. The rollers of the printing unit rotate at a fixed linear speed, and printing is completed as the cardboard box passes through. This process relies on the friction between the feed belt and the rollers to maintain the stable movement of the cardboard box. To achieve multi-color printing, the cardboard box needs to pass through multiple printing units consecutively, with each unit responsible for printing one color.

[0004] However, the shaking and friction changes that cannot be completely avoided during the transportation of cardboard boxes cause slight changes in the position and posture of the boxes as they pass through different printing devices, affecting printing accuracy. This is especially true when performing multi-color printing, where misregistration is particularly prominent.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a precise positioning carton printing device that solves the problem of unavoidable shaking and friction changes during the carton board conveying process, which cause slight changes in its position and posture, affecting printing accuracy.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a precise positioning carton printing device, comprising a device body with a printing plate roller and a printing roller, a fixed frame fixedly connected inside the device body, two mutually symmetrical adjusting rollers slidably connected to the inner wall of the fixed frame, and a moving block rotatably connected to both ends of each adjusting roller, a slide groove for the moving block to slide on the inner wall of the fixed frame, a driving component for driving the two adjusting rollers to move along the slide groove on the fixed frame, an infrared transmitter for measuring the distance between the two moving blocks and an infrared receiver for receiving the infrared transmitter signal respectively installed on the side wall of one of the moving blocks on the two adjusting rollers, and a control panel for displaying the distance between the two moving blocks and controlling the driving component installed on the outer wall of the device body, the control panel and the infrared receiver being electrically connected.

[0008] The present invention is further configured such that: the driving component includes a bidirectional screw rotatably connected in the slide groove, the bidirectional screw being threadedly connected to two moving blocks away from the infrared transmitter and the infrared receiver respectively, and a motor is fixedly connected to the outer wall of the device body, the output end of the motor passing through the device body and being fixedly connected to the bidirectional screw.

[0009] The present invention is further configured such that: a rotating roller is rotatably connected within the device body, and the rotating roller is located between the adjusting roller and the printing roller.

[0010] The present invention is further configured such that: a movable roller is provided on the rotating roller, and the movable roller is slidably connected to the inner wall of the device body.

[0011] The present invention is further configured such that the two adjusting rollers are arranged in a figure-eight pattern.

[0012] The present invention is further configured such that both the fixed frame and the adjusting roller are inclined.

[0013] The present invention is further configured such that the outer wall of the adjusting roller is provided with a flexible anti-slip layer.

[0014] In summary, this utility model has the following beneficial effects:

[0015] When printing multicolor on cardboard, the setting of two adjusting rollers with an infrared transmitter and receiver ensures that the cardboard remains in the same position when entering the printing plate roller and the printing roller, thus preventing changes in the position of the cardboard and improving printing accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 2 A cross-sectional view of this utility model Figure 1 ;

[0018] Figure 3 A cross-sectional view of this utility model Figure 2 ;

[0019] Figure 4 A cross-sectional view of this utility model Figure 3 ;

[0020] Figure 5 This is a schematic diagram of the structure of the adjusting roller and the flexible anti-slip layer.

[0021] In the diagram: 1. Printing roller; 2. Printing roller; 3. Fixed frame; 4. Adjusting roller; 5. Moving block; 6. Slide groove; 7. Infrared transmitter; 8. Infrared receiver; 9. Control panel; 10. Bidirectional screw; 11. Motor; 12. Rotating roller; 13. Moving roller; 14. Flexible anti-slip layer. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Precise positioning of carton printing equipment, such as Figures 1-5 As shown, the device body includes a printing plate roller 1 and a printing roller 2. A fixed frame 3 is fixedly connected inside the device body. Two symmetrical adjusting rollers 4 are slidably connected to the inner wall of the fixed frame 3. Movable blocks 5 are rotatably connected to both ends of the adjusting rollers 4. A groove 6 is provided on the inner wall of the fixed frame 3 for the sliding of the movable blocks 5. A drive assembly is provided on the fixed frame 3 to drive the two adjusting rollers 4 to move along the groove 6. An infrared transmitter 7 for measuring the distance between the two movable blocks 5 and an infrared receiver 8 for receiving the signal from the infrared transmitter 7 are respectively installed on the side wall of one of the movable blocks 5 on the two adjusting rollers 4. A control panel 9 is installed on the outer wall of the device body to display the distance between the two movable blocks 5 and control the drive assembly. The control panel 9 and the infrared receiver 8 are electrically connected.

[0026] When performing multi-color printing on cardboard, the cardboard is fed into the main body of the device and then between two adjusting rollers 4. Simultaneously, the drive assembly is activated via the control panel 9, which moves the two adjusting rollers 4 towards the center line of the fixed frame 3. This also moves the infrared transmitter 7 and infrared receiver 8 on the moving block 5 in the same direction. The infrared transmitter 7 and infrared receiver 8 detect the distance between the two moving blocks 5 and display it on the control panel 9. When the two adjusting rollers 4 and the sides of the cardboard contact each other, the drive assembly stops the two adjusting rollers 4. At this point, the operator records the control data. The data detected by the infrared receiver 8 on panel 9 is used to transport the cardboard sheet between the printing plate roller 1 and the printing roller 2. The cardboard sheet is then output from the device body and input into another device body, and the above operation is repeated. At the same time, the distance between the two adjusting rollers 4 on the subsequent device body is adjusted according to the data to achieve the effect of keeping the distance between the two adjusting rollers 4 in the device body consistent. Through the setting of the two adjusting rollers 4, infrared transmitter 7 and infrared receiver 8, the position of the cardboard sheet can always be kept consistent when entering the printing plate roller 1 and the printing roller 2, avoiding changes in the position of the cardboard sheet and improving printing accuracy.

[0027] Furthermore, a rotating roller 12 is rotatably connected inside the device body. The rotating roller 12 is located between the adjusting roller 4 and the printing roller 2. When conveying the carton board, it can bring the carton board and the rotating roller 12 into contact with each other. The setting of the rotating roller 12 can prevent the carton board from shaking up and down during conveying, thereby improving the stability of the carton board during conveying. A movable roller 13 is provided on the rotating roller 12. The movable roller 13 is slidably connected to the inner wall of the device body, which can further improve the stability between the carton board and the rotating roller 12.

[0028] The two adjusting rollers 4 are arranged in a V-shape, which can form an angle between the two adjusting rollers 4 and the rotating roller 12. This can effectively prevent the sides of the carton board from curling due to the pressure of the adjusting rollers 4. The fixed frame 3 and the adjusting rollers 4 are both set at an angle, which can generate a lateral force when the adjusting rollers 4 rotate, further preventing the position of the carton board from shifting. The outer wall of the adjusting rollers 4 is provided with a flexible anti-slip layer 14, which can improve the protection effect on the carton board and prevent the carton board from developing rough edges due to friction.

[0029] like Figures 1-3As shown, the drive assembly includes a bidirectional screw 10 rotatably connected within the slide groove 6. The bidirectional screw 10 is threadedly connected to two moving blocks 5 located away from the infrared transmitter 7 and the infrared receiver 8, respectively. A motor 11 is fixedly connected to the outer wall of the device body. The output end of the motor 11 passes through the device body and is fixedly connected to the bidirectional screw 10. When the adjusting roller 4 is driven to move along the slide groove 6, the motor 11 is started through the control panel 9. The output end of the motor 11 drives the bidirectional screw 10 to rotate. At the same time, the bidirectional screw 10 drives the two moving blocks 5 to rotate. The moving blocks 5 drive the two adjusting rollers 4 to move along the slide groove 6 towards the center line of the fixed frame 3, thereby achieving the effect of driving the adjusting roller 4 to move.

[0030] The working principle of this utility model is as follows:

[0031] Before printing officially begins, the equipment needs to be calibrated. First, the operator feeds the first piece of cardboard into the equipment. Then, the drive assembly is activated via control panel 9. Motor 11 drives the bidirectional screw 10 to rotate, causing the two adjusting rollers 4, arranged in a V-shape, to move synchronously towards the center line of the fixed frame 3. On the side wall of the moving block 5, infrared transmitter 7 and infrared receiver 8 detect and display the distance between the two adjusting rollers 4 in real time. When the two adjusting rollers 4 contact the edges of the cardboard boxes, the operator stops the drive assembly and records the distance data at this point. This data represents the precise width of this batch of cardboard boxes. Subsequently, the operator inputs this data into the control panel 9 of all subsequent printing equipment to ensure that the distance between the adjusting rollers 4 in all equipment is consistent, completing the alignment calibration of the entire production line.

[0032] After calibration, batch printing can begin. The cardboard boxes are fed into the device and positioned between two pre-set adjusting rollers 4. Because the adjusting rollers 4 are arranged in a V-shape, their rotation not only propels the boxes forward but also generates a lateral force, automatically pushing the cardboard boxes towards the center line for precise alignment. During alignment and transport, the rotating roller 12, located between the adjusting roller 4 and the printing roller 2, contacts the cardboard box, working in conjunction with the moving roller 13 to prevent the cardboard boxes from wobbling and ensure transport stability. Simultaneously, the flexible anti-slip layer 14 on the outer wall of the adjusting roller 4 protects the cardboard boxes from friction damage.

[0033] After precise positioning and stable conveying, the cardboard sheets enter between printing roller 1 and printing roller 2 to complete the first color printing. Subsequently, the cardboard sheets are output and automatically enter the next calibrated spacing device to repeat the above positioning and printing process until all colors are printed. Through this series of workflows, this device can ensure that the position of each cardboard sheet remains consistent throughout all stages of multi-color printing, thereby fundamentally solving the problem of misregistration and significantly improving printing accuracy.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A precision positioning carton printing apparatus, comprising an apparatus body with a printing plate roller (1) and a printing roller (2), characterized in that: A fixed frame (3) is fixedly connected inside the device body. Two symmetrical adjusting rollers (4) are slidably connected to the inner wall of the fixed frame (3). Both ends of the adjusting rollers (4) are rotatably connected to moving blocks (5). The inner wall of the fixed frame (3) is provided with a sliding groove (6) for the moving blocks (5) to slide. The fixed frame (3) is provided with a drive assembly for driving the two adjusting rollers (4) to move along the sliding groove (6). One of the moving blocks (5) on the two adjusting rollers (4) is respectively equipped with an infrared transmitter (7) for measuring the distance between the two moving blocks (5) and an infrared receiver (8) for receiving the signal from the infrared transmitter (7). The outer wall of the device body is equipped with a control panel (9) for displaying the distance between the two moving blocks (5) and controlling the drive assembly. The control panel (9) and the infrared receiver (8) are electrically connected.

2. The precise positioning carton printing device according to claim 1, characterized in that: The drive assembly includes a bidirectional screw (10) rotatably connected in a slide groove (6). The bidirectional screw (10) is threadedly connected to two moving blocks (5) that are far from the infrared transmitter (7) and the infrared receiver (8). A motor (11) is fixedly connected to the outer wall of the device body. The output end of the motor (11) passes through the device body and is fixedly connected to the bidirectional screw (10).

3. The precise positioning carton printing device according to claim 1, characterized in that: A rotating roller (12) is rotatably connected within the device body, and the rotating roller (12) is located between the adjusting roller (4) and the printing roller (2).

4. The precise positioning carton printing device according to claim 3, characterized in that: The rotating roller (12) is provided with a movable roller (13), and the movable roller (13) is slidably connected to the inner wall of the device body.

5. The precision positioning carton printing device according to claim 1, characterized in that: The two regulating rollers (4) are arranged in a figure-eight pattern.

6. The precise positioning carton printing device according to claim 1, characterized in that: Both the fixed frame (3) and the adjusting roller (4) are inclined.

7. The precise positioning carton printing device according to claim 1, characterized in that: The outer wall of the adjusting roller (4) is provided with a flexible anti-slip layer (14).

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