An inter-sheet tension control device for a flexographic printing machine

Abstract

The utility model belongs to the field of tension control device, concretely relates to a paper interzone tension control device of soft printing machine, including pre -sleeve adjusting board, the inside of pre -sleeve adjusting board is provided with mounting hole, the right -hand member of pre -sleeve adjusting board contacts cylinder, and the lower end fixed connection of cylinder output end has pin shaft no.

Description

Technical Field

[0001] This utility model relates to the technical field of tension control devices, specifically a paper tension control device for a flexographic printing machine. Background Technology

[0002] The traditional paper tension control device for flexographic printing presses works by using a cylinder connected to a rocker arm via a cylinder pin. The cylinder's extension and retraction rotates the rocker arm around a guide roller shaft, which in turn drives the guide roller shaft fixed to the rocker arm, thus controlling the paper tension in the flexographic printing press. This control device is complex in structure and lacks precision and safety, requiring limit blocks and limit screws to improve the control of the movement stroke. Therefore, improvements to the existing technology are necessary. Utility Model Content

[0003] The purpose of this invention is to provide a paper tension control device for a flexographic printing machine, which solves the problems of complex structure, insufficient precision and safety of the control device.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a paper tension control device for a flexographic printing machine, comprising a pre-fitting adjustment plate, wherein the pre-fitting adjustment plate has an internal mounting hole, a cylinder is contacted at the right end of the pre-fitting adjustment plate, a first pin is fixedly connected to the lower end of the cylinder output end, a clutch linkage is hinged to the outer side of the first pin, a second pin is fixedly connected to the outer side of the clutch linkage, a pre-fitting cam is fixedly connected to the outer side of the second pin, a key is provided inside the pre-fitting cam, the key is fixedly connected to the second pin, a guide roller shaft is contacted at the lower end of the pre-fitting cam, the guide roller shaft is slidably connected to the pre-fitting adjustment plate, a spring is provided inside the pre-fitting adjustment plate, and a plug is threadedly connected to the bottom of the pre-fitting adjustment plate.

[0005] Preferably, a mounting base is fixedly connected to the outer side of the pre-fitted adjustment plate, and the mounting base is fixedly installed on the top of the cylinder. By designing the mounting base, the cylinder can be installed on the pre-fitted adjustment plate for use.

[0006] Preferably, there are multiple mounting holes, which are evenly distributed inside the pre-fitted adjustment plate. By designing these mounting holes, the pre-fitted adjustment plate can be installed and fixed.

[0007] Preferably, the clutch linkage is rotatably connected to the pre-fitted adjustment plate via a rotating shaft. The rotating shaft is designed so that the clutch linkage can rotate along the pre-fitted adjustment plate.

[0008] Preferably, the pre-fitted adjustment plate has a through groove inside, and a guide roller shaft is slidably connected inside the through groove. By designing the through groove, the guide roller shaft can slide inside the through groove.

[0009] Preferably, one end of the spring contacts the guide roller shaft, and the other end of the spring is fixedly connected to the plug. The spring is designed so that its force can be applied to the guide roller shaft.

[0010] Preferably, the pre-fitted cam is slidably connected to the clutch linkage. By designing the pre-fitted cam, the pre-fitted cam can be deflected when the clutch linkage rotates.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model eliminates the above-mentioned auxiliary components by precisely coordinating the transmission of the cylinder, pre-fit cam and clutch linkage. The tension control function can be achieved by relying solely on the core components. This not only simplifies the overall structural design, but also has the advantage of "easy installation". It can significantly reduce equipment assembly time and labor costs, and adapt to the rapid deployment needs of flexographic printing production lines.

[0012] 2. This invention offers significant advantages in dynamic responsiveness and operational stability of tension control. Traditional devices suffer from control lag and insufficient precision due to complex structures and redundant transmission links. In contrast, this device directly drives the pre-fitting cam to rotate via cylinder extension and retraction. Combined with the instantaneous rebound of the spring within the pre-fitting adjustment plate, it can quickly move the guide roller shaft up and down, resulting in a faster dynamic response speed. It can adapt to changes in paper tension during printing in real time, avoiding printing deviations caused by tension fluctuations. Furthermore, it eliminates the need for additional auxiliary structures, reducing the risk of control failure due to auxiliary component malfunctions. This further enhances the accuracy of tension control and the safety of equipment operation, ensuring the stable output of high-quality printed products from the flexographic printing press. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the overall structure of this utility model; Figure 2 This utility model Figure 1 A three-dimensional view of the local structure.

[0014] In the diagram: 1. Cylinder; 2. Pin 1; 3. Pre-fit cam; 4. Clutch linkage; 5. Guide roller shaft; 6. Plug; 7. Spring; 8. Pin 2; 9. Key; 10. Pre-fit adjustment plate; 11. Through groove; 12. Mounting hole; 13. Mounting seat. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1 , Figure 2 A paper tension control device for a flexographic printing machine includes a pre-fitting adjustment plate 10. Multiple mounting holes 12 are provided inside the pre-fitting adjustment plate 10 and are evenly distributed within it. The mounting holes 12 allow for the installation and fixing of the pre-fitting adjustment plate 10. A cylinder 1 contacts the right end of the pre-fitting adjustment plate 10. A pin 2 is fixedly connected to the lower end of the output end of the cylinder 1. A clutch linkage 4 is hinged to the outer side of the pin 2. The clutch linkage 4 is rotatably connected to the pre-fitting adjustment plate 10 via a rotating shaft. The rotating shaft is designed to allow the clutch linkage 4 to rotate along the pre-fitting adjustment plate 10.

[0017] Please see Figure 1 , Figure 2 A pin 8 is fixedly connected to the outer side of the clutch linkage 4, and a pre-fit cam 3 is fixedly connected to the outer side of the pin 8. The pre-fit cam 3 is slidably connected to the clutch linkage 4. By designing the pre-fit cam 3, when the clutch linkage 4 rotates, it can push the pre-fit cam 3 to deflect. A key 9 is provided inside the pre-fit cam 3, and the key 9 is fixedly connected to the pin 8. The lower end of the pre-fit cam 3 contacts the guide roller shaft 5, and the guide roller shaft 5 is slidably connected to the pre-fit adjustment plate 10. A through groove 11 is opened inside the pre-fit adjustment plate 10, and the guide roller shaft 5 is slidably connected inside the through groove 11. By designing the through groove 11, the guide roller shaft 5 can slide inside the through groove 11.

[0018] Please see Figure 1 , Figure 2 The pre-fitting adjustment plate 10 has a spring 7 inside. One end of the spring 7 is in contact with the guide roller shaft 5, and the other end of the spring 7 is fixedly connected to the plug 6. By designing the spring 7, the force of the spring 7 can be applied to the guide roller shaft 5. The bottom of the pre-fitting adjustment plate 10 is connected to the plug 6 by a thread. The outer side of the pre-fitting adjustment plate 10 is fixedly connected to the mounting base 13. The mounting base 13 is fixedly installed on the top of the cylinder 1. By designing the mounting base 13, the cylinder 1 can be installed on the pre-fitting adjustment plate 10 for use.

[0019] The specific implementation process of this utility model is as follows: When in use, the core power source of the device is cylinder 1. During the printing operation, the extension action of cylinder 1 is transmitted to clutch linkage 4 through pin 1 2. Clutch linkage 4, with the help of the connection between pin 2 8 and key 9, drives the pre-fit cam 3 to rotate synchronously. In this process, clutch linkage 4 acts as a transmission medium to ensure that the power of cylinder 1 can be accurately transmitted to pre-fit cam 3, providing a power basis for subsequent tension adjustment. When the pre-fitted cam 3 rotates, the irregular structure of its cam profile will exert a downward force on the guide roller shaft 5, causing the guide roller shaft 5 to move down along the preset trajectory; the guide roller shaft 5 is in direct contact with the paper, and its downward movement will change the winding angle and tension of the paper, thus achieving the initial adjustment of the tension between the paper. During the downward movement of the guide roller shaft 5, the spring 7 inside the pre-fitting adjustment plate 10 is compressed and stores elastic potential energy. When the cylinder 1 rebounds or the paper tension needs to be reduced during the printing process, the spring 7 releases the elastic potential energy to generate an upward rebound force. This force acts on the pre-fitting cam 3 and the guide roller shaft 5, causing the pre-fitting cam 3 to reset and prompting the guide roller shaft 5 to move upward, thereby adjusting the paper tension in the opposite direction. Through the cyclical coordination of the extension and retraction of cylinder 1 and the rebound of spring 7, guide roller shaft 5 can move up and down reciprocally, continuously and dynamically adjusting the tension of the paper. The whole process does not require additional auxiliary structures such as limit blocks and limit screws. It only relies on the coordinated action of core components such as cylinder 1, pre-fit cam 3, spring 7, and guide roller shaft 5 to match the printing rhythm of the flexographic printing machine in real time and achieve stable control of the tension between the paper.

[0020] 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 paper tension control device for a flexographic printing machine, comprising a pre-fitted adjustment plate (10), characterized in that: The pre-fitting adjustment plate (10) has an installation hole (12) inside. The right end of the pre-fitting adjustment plate (10) is in contact with a cylinder (1). The lower end of the output end of the cylinder (1) is fixedly connected to a first pin (2). The outer side of the first pin (2) is hinged to a clutch linkage (4). The outer side of the clutch linkage (4) is fixedly connected to a second pin (8). The outer side of the second pin (8) is fixedly connected to a pre-fitting cam (3). The pre-fitting cam (3) has a key (9) inside. The key (9) is fixedly connected to the second pin (8). The lower end of the pre-fitting cam (3) is in contact with a guide roller shaft (5). The guide roller shaft (5) is slidably connected to the pre-fitting adjustment plate (10). The pre-fitting adjustment plate (10) has a spring (7) inside. The bottom of the pre-fitting adjustment plate (10) is connected to a plug (6) by a thread.

2. The paper tension control device for a flexographic printing machine according to claim 1, characterized in that: The outer side of the pre-fitted adjustment plate (10) is fixedly connected to a mounting base (13), which is fixedly installed on the top of the cylinder (1).

3. The paper tension control device for a flexographic printing machine according to claim 1, characterized in that: The number of mounting holes (12) is multiple, and the multiple mounting holes (12) are evenly distributed inside the pre-fitted adjustment plate (10).

4. The paper tension control device for a flexographic printing machine according to claim 1, characterized in that: The clutch linkage (4) is rotatably connected to the pre-fitted adjustment plate (10) via a rotating shaft.

5. The paper tension control device for a flexographic printing machine according to claim 1, characterized in that: The pre-fitted adjustment plate (10) has a through groove (11) inside, and a guide roller shaft (5) is slidably connected inside the through groove (11).

6. The paper tension control device for a flexographic printing machine according to claim 1, characterized in that: One end of the spring (7) is in contact with the guide roller shaft (5), and the other end of the spring (7) is fixedly connected to the plug (6).

7. The paper tension control device for a flexographic printing machine according to claim 1, characterized in that: The pre-fitted cam (3) is slidably connected to the clutch linkage (4).

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