A novel cylinder structure for printing units

Abstract

The utility model relates to a drum structure technical field, and disclose a novel printing department drum structure, including the cylinder, the outside of cylinder is provided with wear -resisting coating, the inner side wall of cylinder is provided with the connecting ring, the inner side of cylinder and located one side of connecting ring is provided with the connecting disc, the first connecting thread hole is set up on the connecting ring, the second connecting thread hole is set up with first connecting thread hole opposite place on the connecting disc, the ventilation hole is set up on the connecting disc and located one side of second connecting thread hole, the upper and lower both ends of connecting ring and connecting disc all are through fastening bolt and pass second connecting thread hole and first connecting thread hole screw thread connection, one end of connecting disc is connected with the pivot, the utility model discloses the cylinder is designed as hollow structure, is equipped with helical air passage inside, makes need not electronic fan, relies on cylinder rotation natural flow guide, makes through air convection heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of roller structure technology, specifically a novel roller structure for a printing section. Background Technology

[0002] Printing press cylinders are a crucial component of the printing process. Their primary function is to transfer printing material, ensuring its even printing. Furthermore, the cylinder surface features various patterns and uneven areas, which help the printing equipment achieve specific effects, such as relief printing and gravure printing. The printing press cylinder is an indispensable part of the printing process; its structure and function directly affect the quality and effect of the printed materials.

[0003] Existing printing cylinder structures generate heat during high-speed friction, but lack effective heat dissipation structures, leading to thermal expansion and deformation or ink drying problems. Secondly, the surface materials of the cylinders, such as ordinary steel or rubber, have poor wear resistance, and the surface wears down after long-term use, resulting in decreased printing quality and the need for frequent replacement. Furthermore, when the cylinder body wears down, the entire cylinder structure needs to be replaced, resulting in high maintenance costs. Therefore, there is an urgent need for a new type of printing cylinder structure to solve the above technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a novel roller structure for printing, which solves the problems mentioned in the background art regarding the existing roller structures for printing. During use, the roller generates heat due to high-speed friction, but lacks an effective heat dissipation structure, leading to thermal expansion and deformation or ink drying problems. Furthermore, the roller surface materials, such as ordinary steel or rubber, have poor wear resistance, and the surface wears down after long-term use, resulting in a decline in printing quality and the need for frequent replacement. Moreover, when the cylinder wears down, the entire roller structure needs to be replaced, resulting in high maintenance costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A novel roller structure for a printing section includes a cylinder body with a wear-resistant coating on its outer side. A connecting ring is provided on the inner wall of the cylinder body, and a connecting disc is provided on the inner side of the cylinder body, located to one side of the connecting ring. A first connecting threaded hole is provided on the connecting ring, and a second connecting threaded hole is provided on the connecting disc, directly opposite the first connecting threaded hole. A ventilation hole is provided on the connecting disc, located to one side of the second connecting threaded hole. The upper and lower ends of the connecting ring and the connecting disc are threadedly connected by fastening bolts passing through the second connecting threaded hole and the first connecting threaded hole. A rotating shaft is connected to one end of the connecting disc, and an air channel is provided on the inner wall of the cylinder body.

[0007] As a preferred embodiment of this utility model, the center of the ventilation hole and the axis of the rotating shaft are not on the same horizontal straight line.

[0008] As a preferred embodiment of this invention, the air channel is spiral in shape.

[0009] As a preferred embodiment of this utility model, the number of connecting rings is set to two, and the two connecting rings are arranged symmetrically about the cylinder.

[0010] In a preferred embodiment of this invention, the connecting ring contacts one side of the connecting disk, but the two are not connected.

[0011] As a preferred embodiment of this utility model, the number of connecting discs is set to two, and the two connecting discs are arranged symmetrically about the cylinder.

[0012] As a preferred embodiment of this utility model, the number of the rotating shafts is set to two, and the two rotating shafts are arranged symmetrically about the cylinder.

[0013] In a preferred embodiment of this invention, the number of fastening bolts is set to four.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model designs the cylinder as a hollow structure with a spiral air channel inside, so that there is no need for an electric fan. The air is naturally guided by the rotation of the cylinder, and the heat is dissipated through air convection.

[0016] 2. This utility model improves the wear resistance of the roller by providing a wear-resistant coating on the outside of the cylinder.

[0017] 3. By setting a first connecting threaded hole, a fastening bolt, a second connecting threaded hole, a connecting ring, and a connecting disc, and utilizing their mutual cooperation, this utility model allows for the direct replacement of the cylinder and connecting ring after the cylinder body is worn, without the need to replace the entire roller, thus reducing maintenance costs. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 3 This is a structural schematic diagram showing the positional relationship between the cylinder and the air channel of this utility model;

[0022] Figure 4 This is a side view of the connecting disc structure of this utility model;

[0023] Figure 5 This is a side view of the connecting ring structure of this utility model.

[0024] In the diagram: 1. Cylinder body; 2. Wear-resistant coating; 3. Connecting ring; 4. Connecting disc; 5. Shaft; 6. Ventilation hole; 7. Second connecting threaded hole; 8. First connecting threaded hole; 9. Fastening bolt; 10. Air passage. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings. In the embodiments of the present utility model, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components in the drawings.

[0026] Please see Figure 1-5 A novel roller structure for a printing section includes a cylinder 1. The outer side of the cylinder 1 is coated with a wear-resistant coating 2, which improves the roller's wear resistance. A connecting ring 3 is provided on the inner wall of the cylinder 1. A connecting disc 4 is provided on the inner side of the cylinder 1, located to one side of the connecting ring 3. A first connecting threaded hole 8 is provided on the connecting ring 3. A second connecting threaded hole 7 is provided on the connecting disc 4, directly opposite the first connecting threaded hole 8. A ventilation hole 6 is provided on the connecting disc 4, located to one side of the second connecting threaded hole 7. Fastening bolts 9 pass through the second connecting ring 3 and the connecting disc 4 at both ends. The threaded hole 7 and the first connecting threaded hole 8 are threaded together. By setting the first connecting threaded hole 8, the fastening bolt 9, the second connecting threaded hole 7, the connecting ring 3 and the connecting disc 4, and utilizing their mutual cooperation, it is possible to directly replace the cylinder 1 and the connecting ring 3 after the cylinder 1 is worn, without having to replace the entire roller, thus reducing maintenance costs. One end of the connecting disc 4 is connected to the rotating shaft 5. An air channel 10 is provided on the inner side wall of the cylinder 1. The cylinder 1 is designed as a hollow structure with a spiral air channel 10 inside, so that there is no need for an electric fan. The air is naturally guided by the rotation of the cylinder 1, so that heat is dissipated through air convection.

[0027] The center of the ventilation hole 6 is not on the same horizontal straight line as the axis of the rotating shaft 5.

[0028] The air passage 10 is spiral in shape.

[0029] The number of connecting rings 3 is set to two, and the two connecting rings 3 are arranged symmetrically about the cylinder 1.

[0030] The connecting ring 3 is in contact with one side of the connecting disk 4, but the two are not connected.

[0031] The number of connecting discs 4 is set to two, and the two connecting discs 4 are arranged symmetrically about the cylinder 1.

[0032] The number of rotating shafts 5 is set to two, and the two rotating shafts 5 are arranged symmetrically about the cylinder 1.

[0033] The number of fastening bolts 9 is set to four.

[0034] The working principle and usage process of this utility model are as follows: First, the wear-resistant coating 2 set on the outer side of the cylinder 1 comes into direct contact with the printing material, which reduces friction and wear and extends the service life of the cylinder. During high-speed printing, the coating can withstand repeated mechanical stress, maintain surface flatness, and ensure printing quality.

[0035] When the cylinder 1 wears out, it is not necessary to replace the entire drum. Only the cylinder 1 and the connecting ring 3 need to be replaced. This is because the connecting ring 3 is connected to the connecting disc 4 by the fastening bolt 9. The specific steps are to loosen the fastening bolt 9, remove the worn cylinder 1 and the connecting ring 3 together, and then install a new cylinder and the connecting ring. The connecting disc 4 and the rotating shaft 5 remain unchanged as core drive components, thereby reducing maintenance costs and downtime.

[0036] The cylinder 1 is designed as a hollow structure with a spiral air channel 10 on its inner wall. When the cylinder rotates, air is naturally drawn in and expelled by centrifugal force and aerodynamic principles, forming a continuous airflow. The spiral channel increases the airflow path and heat exchange area, thereby efficiently removing heat from the inside of the cylinder 1. The ventilation holes 6 on the connecting disc 4 allow air to enter and exit the air channel 10. The center of the ventilation hole 6 is not on the same horizontal line as the axis of the rotating shaft 5. This asymmetrical design generates vortices or pressure differences during rotation, promoting air mixing and flow, enhancing heat dissipation efficiency, eliminating the need for an electric fan, reducing energy consumption and potential failure points. During the printing process, the cylinder 1 generates heat due to friction. The heat is conducted through the cylinder wall to the air channel 10. The airflow driven by the rotation exhausts the hot air from the ventilation hole 6 while simultaneously drawing in cold air, forming a convection cycle, maintaining a stable cylinder temperature, and preventing deformation or printing problems caused by overheating.

[0037] The rotating shaft 5 is driven to rotate by an external drive device such as a motor. The connecting disc 4 is fixedly connected to the rotating shaft 5, thereby transmitting torque to the connecting ring 3 and the cylinder 1 through the fastening bolt 9. The cylinder 1 rotates accordingly to perform the printing function. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A novel roller structure for a printing section, comprising a cylinder (1), characterized in that: The outer side of the cylinder (1) is provided with a wear-resistant coating (2). A connecting ring (3) is provided on the inner wall of the cylinder (1). A connecting disc (4) is provided on the inner side of the cylinder (1) and on one side of the connecting ring (3). A first connecting threaded hole (8) is provided on the connecting ring (3). A second connecting threaded hole (7) is provided on the connecting disc (4) opposite to the first connecting threaded hole (8). A ventilation hole (6) is provided on the connecting disc (4) and on one side of the second connecting threaded hole (7). The upper and lower ends of the connecting ring (3) and the connecting disc (4) are threadedly connected by fastening bolts (9) passing through the second connecting threaded hole (7) and the first connecting threaded hole (8). A rotating shaft (5) is connected to one end of the connecting disc (4). An air channel (10) is provided on the inner wall of the cylinder (1).

2. The novel roller structure for a printing section according to claim 1, characterized in that: The center of the ventilation hole (6) is not on the same horizontal straight line as the axis of the rotating shaft (5).

3. The novel roller structure for printing section according to claim 1, characterized in that: The air passage (10) is spiral in shape.

4. The novel roller structure for printing section according to claim 1, characterized in that: The number of connecting rings (3) is set to two, and the two connecting rings (3) are arranged symmetrically about the cylinder (1) on the left and right axes.

5. A novel roller structure for a printing section according to claim 1, characterized in that: The connecting ring (3) is in contact with one side of the connecting disk (4), but the two are not connected.

6. The novel roller structure for a printing section according to claim 1, characterized in that: The number of connecting discs (4) is set to two, and the two connecting discs (4) are arranged symmetrically about the cylinder (1) on the left and right axes.

7. A novel roller structure for a printing section according to claim 1, characterized in that: The number of the rotating shafts (5) is set to two, and the two rotating shafts (5) are arranged symmetrically about the cylinder (1) on the left and right axes.

8. The novel roller structure for a printing section according to claim 1, characterized in that: The number of fastening bolts (9) is set to four.

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