A printing machine for preventing printing deviation

Abstract

The utility model provides a kind of printing machine for preventing printing deviation, including rack, paper transmission cylinder, speed reducer motor, the inside movable joint of rack has paper transmission cylinder, the side of rack is fixedly connected with several speed reducer motor;The inside fixed connection of rack has track, the bearing seat is movably connected on track, and plate cylinder is movably connected between bearing seat;The top fixed connection of rack has electric cylinder, and electric cylinder is vertically installed.The utility model has the advantages that: adjusting cylinder can be flexibly adjusted by the linkage of auxiliary electric cylinder, guide rod and other components, the horizontal angle and the included angle with paper transmission cylinder can be flexibly adjusted.In the paper transmission process, the tension of paper can be adjusted in real time according to actual situation, to ensure that paper always maintains flat, stable transmission state, effectively avoids the problems such as wrinkle and deviation caused by uneven paper tension, greatly improves the precision and stability of printing.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to a printing press for preventing printing deviations. Background Technology

[0002] In the printing industry, offset printing presses are widely used in the printing of various paper materials such as books, packaging, and advertising. Traditional printing presses typically include a paper feed mechanism, printing units (including plate cylinders, blanket cylinders, and impression cylinders), a transmission system, and a control unit. During actual printing, factors such as paper material, humidity, tension variations, or mechanical transmission errors can easily cause paper misalignment, wrinkling, or stretching deformation during transport, leading to issues such as misalignment, ghosting, and blurring of the printed image, severely impacting print quality and yield.

[0003] Currently, most printing presses employ mechanical or pneumatic tension control systems, using fixed-position guide rollers or tension sensors for initial paper adjustment. However, these systems often have slow response times and limited adjustment precision, making it difficult to achieve real-time, high-precision paper deviation correction. Especially under high-speed printing conditions, traditional structures cannot adapt to the dynamic changes in the paper in a timely manner, easily accumulating errors. Therefore, this paper proposes a printing press to prevent printing deviations and address these issues. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide a printing machine that prevents printing deviations, so as to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of the present invention provides a printing press for preventing printing deviations, including a frame, a paper feed roller, and a geared motor. The paper feed roller is movably connected to the inner side of the frame, and several geared motors are fixedly connected to the side of the frame. The inner side of the frame is fixedly connected to a rail, a bearing seat is movably connected to the rail, and a printing roller is movably connected between the bearing seats; An electric cylinder is fixedly connected to the top of the frame. The electric cylinder is installed vertically, and the end of the output end of the electric cylinder is fixedly connected to the top surface of the bearing seat. The bearing seat can be raised and lowered. A rubber roller is movably connected to the inner side of the frame, and an impression roller is movably connected to the inner side of the frame. The rubber roller, impression roller, and paper transfer roller are respectively connected and linked to the output end of the corresponding geared motor. An ink collection plate is detachably connected to the inner side of the frame, and the ink collection plate is located in front of and below the printing cylinder, rubber cylinder, and impression cylinder. A photoelectric sensor is fixedly connected to the top of the frame, with the detection end of the photoelectric sensor facing downwards and directly opposite the paper feed roller; The machine body is fixedly connected to the corner of the frame, and an auxiliary electric cylinder is movably connected to the inner side of the machine body; A main shaft is movably connected to the inner side of the machine body. A transverse guide rod is fixedly connected to the main shaft. A connector is fixedly connected to the outer end of the guide rod. The connector is movably connected to the end of the output terminal of the auxiliary electric cylinder. The other end of the guide rod is movably connected to an adjusting roller, the horizontal angle of which is adjustable.

[0007] Preferably, in any of the above embodiments, the frame integrates a controller, the paper transfer roller is located above and to the side of the plate cylinder, and the axis of the paper transfer roller is at the same height as the axis of the adjusting roller.

[0008] The above-mentioned technical solution is adopted: This printing press mainly includes a frame, paper feed cylinder, plate cylinder, rubber cylinder, impression cylinder, and ink collection plate, and is powered by a geared motor.

[0009] Preferably, of any of the above solutions, the track is made of stainless steel, and the distance between the printing roller and the rubber roller is adjustable.

[0010] Driven by a geared motor connected to it, the paper transfer roller rotates to transport the paper to be printed. The paper transfer roller is located above and to the side of the printing cylinder, and its axis is at the same height as the axis of the adjusting roller. This layout facilitates the smooth and accurate entry of the paper into the printing area.

[0011] A vertically mounted electric cylinder, fixedly connected to the top of the frame, has its output end fixedly connected to the top surface of a bearing housing. The extension and retraction of the electric cylinder drives the bearing housing to move up and down on a track. The plate cylinder is movably connected between the bearing housings, allowing for height adjustment of the plate cylinder and, consequently, the distance between the plate cylinder and the blanket cylinder to meet different printing needs. The plate cylinder has an ink pattern applied to it. When paper is transferred between the plate cylinder and the blanket cylinder, the plate cylinder transfers the ink to the blanket cylinder. The blanket cylinder then continues to rotate, working in conjunction with the impression cylinder to accurately print the ink onto the paper. The blanket cylinder and impression cylinder are connected and linked to the output ends of their respective geared motors, ensuring they operate at the set speed and rhythm, guaranteeing printing stability and consistency. An auxiliary electric cylinder, movably connected to the inside of the machine body, has its output end movably connected to a connector. The connector is fixed to the outer end of a guide rod, which is fixed to the main shaft. The other end of the guide rod is movably connected to an adjusting cylinder. The extension and retraction of the auxiliary electric cylinder drives the guide rod to rotate around the main shaft, thereby changing the horizontal angle of the adjusting cylinder and its angle with the paper transfer cylinder. By adjusting the angle of the adjusting roller, the tension of the paper during transport can be controlled, preventing wrinkles or shifting due to uneven tension and further ensuring print quality. A photoelectric sensor, fixedly connected to the top of the frame, faces downwards towards the paper transport roller, monitoring the paper's position and status in real time. The photoelectric sensor transmits the detected signal to a controller integrated on the frame, which analyzes and processes the signal. If a paper deviation is detected, the controller sends a command to activate the auxiliary electric cylinder, adjusting the angle of the adjusting roller to correct the paper's transport path and prevent printing errors.

[0012] The detachable ink collection plate inside the frame is located in front of and below the printing cylinder, rubber cylinder, and impression cylinder. It can collect ink that drips or splashes during the printing process, preventing ink from contaminating other internal parts of the printing press. It also facilitates cleaning and replacement of the ink collection plate, ensuring the cleanliness and normal operation of the printing press.

[0013] Preferably, below any of the above embodiments, the printing cylinder is arranged in sequence as a rubber cylinder and an impression cylinder, and the ink collection plate is connected to the inner side of the frame by screws.

[0014] Preferably, in any of the above schemes, the output end of the photoelectric sensor is connected to the controller of the frame, and then the output end of the controller is connected to the auxiliary electric cylinder.

[0015] The extension and retraction of the auxiliary electric cylinder drives the guide rod to rotate around the main shaft, thereby changing the horizontal angle of the adjusting roller and its angle with the paper conveying roller. Through the linkage of the auxiliary electric cylinder, guide rod, and other components, the adjusting roller can flexibly adjust its horizontal angle and its angle with the paper conveying roller. During paper transport, the paper tension can be adjusted in real time according to actual conditions, ensuring that the paper remains flat and stable during transport. This effectively avoids problems such as wrinkles and misalignment caused by uneven paper tension, greatly improving printing accuracy and stability.

[0016] Preferably, in any of the above solutions, the angle between the adjusting roller and the paper conveying roller is adjustable.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: This printing press, designed to prevent printing deviations, utilizes an auxiliary electric cylinder whose extension and retraction movement drives a guide rod to rotate around the main shaft, thereby altering the horizontal angle of the adjusting cylinder and its angle with the paper feed cylinder. Through the coordinated operation of the auxiliary electric cylinder, guide rod, and other components, the adjusting cylinder allows for flexible adjustment of its horizontal angle and its angle with the paper feed cylinder. During paper transport, the press can adjust paper tension in real time according to actual conditions. Even with high-speed paper transport, it effectively ensures that the paper remains flat and stable, preventing wrinkles and misalignment caused by uneven paper tension, thus significantly improving printing accuracy and stability.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the present invention from a second perspective; Figure 3 This is a structural schematic diagram of the present invention from a third-view perspective; Figure 4 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0020] In the diagram: 1-Frame, 2-Paper feed roller, 3-Gear motor, 4-Railway, 5-Bearing seat, 6-Printing roller, 7-Electric cylinder, 8-Rubber roller, 9-Impression roller, 10-Ink collection plate, 11-Photoelectric sensor, 12-Machine body, 13-Electric cylinder, 14-Main shaft, 15-Guide rod, 16-Joint, 17-Adjusting roller. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] like Figure 1-4 As shown, this printing press for preventing printing deviation includes a frame 1, a paper feed roller 2, and a geared motor 3. The paper feed roller 2 is movably connected to the inner side of the frame 1, and several geared motors 3 are fixedly connected to the side of the frame 1. A track 4 is fixedly connected to the inner side of the frame 1, a bearing seat 5 is movably connected to the track 4, and a printing roller 6 is movably connected between the bearing seats 5. An electric cylinder 7 is fixedly connected to the top of the frame 1. The electric cylinder 7 is installed vertically, and the end of the output end of the electric cylinder 7 is fixedly connected to the top surface of the bearing seat 5. The bearing seat 5 can be raised and lowered. A rubber roller 8 is movably connected to the inner side of the frame 1, and an impression roller 9 is movably connected to the inner side of the frame 1. The rubber roller 8, the impression roller 9, and the paper transfer roller 2 are respectively connected and linked to the output end of the corresponding geared motor 3. The inner side of the frame 1 is detachably connected to an ink collection plate 10, which is located in front of and below the printing cylinder 6, the rubber cylinder 8, and the impression cylinder 9. A photoelectric sensor 11 is fixedly connected to the top of the frame 1, with the detection end of the photoelectric sensor 11 facing downwards and directly opposite the paper feed roller 2; An organic body 12 is fixedly connected to the corner of the frame 1, and an auxiliary electric cylinder 13 is movably connected to the inner side of the organic body 12; A main shaft 14 is movably connected to the inner side of the body 12. A transverse guide rod 15 is fixedly connected to the main shaft 14. A connector 16 is fixedly connected to the outer end of the guide rod 15. The connector 16 is movably connected to the end of the output end of the auxiliary electric cylinder 13. The other end of the guide rod 15 is movably connected to an adjusting roller 17, the horizontal angle of which is adjustable.

[0024] Example 1: A controller is integrated on the frame 1. The paper feed roller 2 is located above and to the side of the plate cylinder 6, and the axis of the paper feed roller 2 is at the same height as the axis of the adjusting roller 17. This printing press mainly includes the frame 1, paper feed roller 2, plate cylinder 6, rubber roller 8, impression cylinder 9, and ink collection plate 10, and is powered by a geared motor 3. The track 4 is made of stainless steel, and the distance between the plate cylinder 6 and the rubber roller 8 is adjustable. Below the plate cylinder 6 are the rubber roller 8 and the impression cylinder 9, respectively. The ink collection plate 10 is connected to the inside of the frame 1 by screws. The output of the photoelectric sensor 11 is connected to the controller of the frame 1, and the output of the controller is then connected to the auxiliary electric cylinder 13. The angle between the adjusting roller 17 and the paper feed roller 2 is adjustable.

[0025] Example 2: The paper transfer roller 2 rotates under the drive of the geared motor 3 connected to it, transporting the paper to be printed. The paper transfer roller 2 is located above and to the side of the plate cylinder 6, and its axis is at the same height as the axis of the adjusting roller 17. This layout is conducive to the smooth and accurate entry of the paper into the printing area.

[0026] A vertically mounted electric cylinder 7, fixedly connected to the top of the frame 1, has its output end fixedly connected to the top surface of the bearing seat 5. The extension and retraction of the electric cylinder 7 drives the bearing seat 5 to move up and down on the track 4. The plate cylinder 6 is movably connected between the bearing seats 5, thereby adjusting the height of the plate cylinder 6 and the distance between the plate cylinder 6 and the rubber roller 8 to meet different printing needs. The plate cylinder 6 has an ink pattern attached. When paper is transferred between the plate cylinder 6 and the rubber roller 8, the plate cylinder 6 transfers the ink to the rubber roller 8. Then, the rubber roller 8 continues to rotate, cooperating with the impression cylinder 9 to accurately print the ink onto the paper. The rubber roller 8 and the impression cylinder 9 are respectively connected and linked to the output ends of the corresponding reduction motors 3 to ensure they operate at the set speed and rhythm, guaranteeing printing stability and consistency. An auxiliary electric cylinder 13, movably connected to the inside of the machine body 12, has its output end movably connected to a connector 16. The connector 16 is fixed to the outer end of a guide rod 15, which is fixed to the main shaft 14. The other end of the guide rod 15 is movably connected to an adjusting roller 17. The extension and retraction of the auxiliary electric cylinder 13 drives the guide rod 15 to rotate around the main shaft 14, thereby changing the horizontal angle of the adjusting roller 17 and its angle with the paper conveying roller 2. By adjusting the angle of the adjusting roller 17, the tension of the paper during transmission can be controlled, preventing wrinkles or deviations due to uneven tension, and further ensuring printing quality. The photoelectric sensor 11, fixedly connected to the top of the frame 1, has its detection end facing downwards towards the paper conveying roller 2, detecting the paper's transmission position and status in real time. The photoelectric sensor 11 transmits the detected signal to the controller integrated on the frame 1, which analyzes and processes the signal. If a paper deviation is detected, the controller will issue a command to control the auxiliary electric cylinder 13 to adjust the angle of the adjusting roller 17, promptly correcting the paper's transmission path and preventing printing deviations.

[0027] The ink collection plate 10, which is detachably connected to the inner side of the frame 1, is located in front of and below the printing cylinder 6, rubber cylinder 8, and impression cylinder 9. It can collect ink that drips or splashes during the printing process, preventing ink from contaminating other parts inside the printing press. It also facilitates the cleaning and replacement of the ink collection plate 10, ensuring the cleanliness and normal operation of the printing press.

[0028] The working principle of this utility model is as follows: Inspect all components of the printing press, ensuring the frame 1 is stable and that the surfaces of the paper feed cylinder 2, plate cylinder 6, blanket cylinder 8, impression cylinder 9, and adjusting cylinder 17 are free from damage and foreign matter. Check that the track 4 is clean and free from jamming, and that the bearing housing 5 slides smoothly on the track 4. Check that the connection between the electric cylinder 7 and the auxiliary electric cylinder 13 is secure and that they operate normally, ensuring accurate response to controller commands. Check that the detection end of the photoelectric sensor 11 is clean and that the signal transmission line is unobstructed, ensuring accurate detection of paper position and status. Check that the ink collection plate 10 is securely installed, its surface is clean, and it can collect ink normally.

[0029] Install the prepared printing plate onto the plate cylinder 6, ensuring it is securely mounted and accurately positioned. Prepare an appropriate amount of ink according to the color requirements of the brochure and apply it evenly to the plate cylinder 6. Place the specially coated paper at the feed end of the paper transfer cylinder 2 and adjust its position to align it with the transport direction of the paper transfer cylinder 2.

[0030] Turn on the power to the printing press and start the geared motor 3 to make the paper feed roller 2, rubber roller 8, and impression roller 9 start rotating. Driven by the geared motor 3, the paper feed roller 2 smoothly transports paper at the set speed.

[0031] Depending on the thickness of the special coated paper and the printing requirements, the controller controls the extension and retraction of the electric cylinder 7. The output end of the electric cylinder 7 drives the bearing seat 5 to rise or fall on the track 4, thereby adjusting the height of the plate cylinder 6 so that the distance between the plate cylinder 6 and the rubber roller 8 reaches the optimal printing state, ensuring that the ink can be accurately and evenly transferred from the plate cylinder 6 to the rubber roller 8.

[0032] During the initial paper transport, the paper tension is observed. The auxiliary electric cylinder 13 is extended and retracted by the controller. The output of the auxiliary electric cylinder 13 moves the connector 16, causing the guide rod 15 to rotate around the main shaft 14. This adjusts the horizontal angle of the adjusting roller 17 and its angle with the paper transport roller 2, maintaining appropriate paper tension during transport and preventing wrinkles or slack. When the paper is transported between the plate cylinder 6 and the rubber roller 8, the ink on the plate cylinder 6 is transferred to the rubber roller 8. Then, the rubber roller 8 cooperates with the impression cylinder 9 to print the ink onto the paper. During printing, the photoelectric sensor 11 continuously detects the paper's transport position and status, with its detection end facing downwards towards the paper transport roller 2, sending detection signals to the controller.

[0033] The controller analyzes and processes the signal from the photoelectric sensor 11 in real time to determine if there is any deviation in the paper. For example, if the paper shifts to the left during transport, the signal detected by the photoelectric sensor 11 will change, and the controller can quickly identify this change. When the controller detects a deviation in the paper, it immediately issues a command to control the auxiliary electric cylinder 13 to operate. The auxiliary electric cylinder 13 extends and retracts according to the controller's command, and through the transmission of the guide rod 15 and the connector 16, it quickly adjusts the angle of the adjusting roller 17 and the angle between it and the paper conveying roller 2.

[0034] Adjusting the angle of roller 17 will fine-tune the paper's transport path, thereby pulling the paper back to the correct position, correcting printing deviations in time, and ensuring the accuracy of subsequent printing.

[0035] Compared with the prior art, the present invention has the following advantages: This printing press, designed to prevent printing deviations, utilizes the extension and retraction of the auxiliary electric cylinder 13 to rotate the guide rod 15 around the main shaft 14, thereby altering the horizontal angle of the adjusting roller 17 and its angle with the paper conveyor roller 2. Through the linkage of the auxiliary electric cylinder 13, guide rod 15, and other components, the adjusting roller 17 can flexibly adjust its horizontal angle and its angle with the paper conveyor roller 2. During paper transport, the paper tension can be adjusted in real time according to actual conditions. Even with high-speed paper transport, it effectively ensures that the paper remains flat and stable, preventing wrinkles and misalignment caused by uneven paper tension, thus significantly improving printing accuracy and stability.

Claims

1. A printing press for preventing printing deviations, characterized in that, It includes a frame (1), a paper feed roller (2), and a geared motor (3). The paper feed roller (2) is movably connected to the inner side of the frame (1), and several geared motors (3) are fixedly connected to the side of the frame (1). The inner side of the frame (1) is fixedly connected to a track (4), a bearing seat (5) is movably connected on the track (4), and a printing roller (6) is movably connected between the bearing seats (5). An electric cylinder (7) is fixedly connected to the top of the frame (1). The electric cylinder (7) is installed vertically. The end of the output end of the electric cylinder (7) is fixedly connected to the top surface of the bearing seat (5). The bearing seat (5) can be raised and lowered. The inner side of the frame (1) is movably connected to a rubber roller (8), and the inner side of the frame (1) is movably connected to an impression roller (9). The rubber roller (8), the impression roller (9), and the paper transfer roller (2) are respectively connected and linked to the output end of the corresponding reduction motor (3). The inner side of the frame (1) is detachably connected to an ink collection plate (10), which is located in front of and below the printing cylinder (6), rubber cylinder (8), and impression cylinder (9). A photoelectric sensor (11) is fixedly connected to the top of the frame (1), and the detection end of the photoelectric sensor (11) faces downward and is directly opposite the paper feed roller (2). An organic body (12) is fixedly connected to the corner of the frame (1), and an auxiliary electric cylinder (13) is movably connected to the inner side of the organic body (12). The inner side of the body (12) is movably connected to a main shaft (14), and a horizontal guide rod (15) is fixedly connected to the main shaft (14). The outer end of the guide rod (15) is fixedly connected to a connector (16), and the connector (16) is movably connected to the end of the output end of the auxiliary electric cylinder (13). The other end of the guide rod (15) is movably connected to an adjusting roller (17), the horizontal angle of which is adjustable.

2. A printing press for preventing printing deviations as described in claim 1, characterized in that: The frame (1) is equipped with a controller. The paper transfer roller (2) is located above the plate roller (6) on the side. The axis of the paper transfer roller (2) is at the same height as the axis of the adjusting roller (17).

3. A printing press for preventing printing deviations as described in claim 2, characterized in that: The track (4) is made of stainless steel, and the distance between the printing roller (6) and the rubber roller (8) is adjustable.

4. A printing press for preventing printing deviations as described in claim 3, characterized in that: Below the printing cylinder (6) are, in order, a rubber cylinder (8) and an impression cylinder (9), and the ink collection plate (10) is connected to the inside of the frame (1) by screws.

5. A printing press for preventing printing deviations as described in claim 4, characterized in that: The output end of the photoelectric sensor (11) is connected to the controller of the frame (1), and then the output end of the controller is connected to the auxiliary electric cylinder (13).

6. A printing press for preventing printing deviations as described in claim 5, characterized in that: The angle between the adjusting roller (17) and the paper transfer roller (2) is adjustable.

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