Ink cylinder for sheet-fed gravure press

Abstract

The utility model discloses an ink cylinder for a sheet-fed gravure press, which comprises a cylinder body, a first partition plate is arranged in the cylinder body, the cylinder body is divided into an ink inlet cylinder body and an ink outlet cylinder body by the first partition plate, and a first flow guide hole communicated with the ink inlet cylinder body and the ink outlet cylinder body is arranged at the bottom of the first partition plate; compared with the prior art, the ink tank has the advantages that the flowability of ink in the tank body is improved through the arrangement of the first partition plate, in the using process, along with the reduction of the amount of the ink in the ink outlet tank body, the ink in the ink inlet tank body can be automatically supplemented into the ink outlet tank body, along with the flowing of the ink, precipitation layering generated in the standing process of the ink tank body is reduced, and the printing quality is improved.

Description

An ink cylinder for a sheet-fed gravure printing press Technical Field

[0001] This utility model relates to the field of paper printing technology, and in particular to an ink cylinder for a sheet-fed gravure printing machine. Background Technology

[0002] Sheet-fed gravure printing machines, also known as single-sheet gravure machines, eliminate the color difference phenomenon often seen in offset printing, and produce a glossy ink layer. They are one of the most commonly used printing equipment.

[0003] The ink cylinder is a crucial component of a gravure printing press, its function being to store ink and supply it to the printing roller. The ink cylinders currently used by our company are relatively large, allowing for excessive ink loading at a time. During use, ink sedimentation and settling cause the various components (such as pigments and binders) to separate, resulting in unstable ink viscosity. This not only easily leads to ink streaking during printing, reducing print quality, but also damages the doctor blade. Frequent blade changes during printing further impact production schedules and reduce efficiency.

[0004] Patent publication number "CN204547331U" discloses "an ink cylinder for self-improving ink quality," which includes a stirring device inside the ink cylinder to eliminate the adverse effects of ink sedimentation on printing. However, the stirring device requires electricity, increasing production costs. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by improving the ink cylinder, increasing the fluidity of the ink within the ink cylinder, and improving printing quality and efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An ink cylinder for a sheet-fed gravure printing machine includes a cylinder body, wherein a first partition is provided inside the cylinder body, the first partition dividing the cylinder body into an ink inlet cylinder body and an ink outlet cylinder body, and a first guide hole is provided at the bottom of the first partition body to connect the ink inlet cylinder body and the ink outlet cylinder body.

[0008] Preferably, the ink inlet cylinder body is provided with an inclined surface facing the first guide hole.

[0009] Preferably, the cylinder body is provided with a second partition, a third partition, and a fourth partition, which divide the cylinder body into an ink inlet cylinder, an ink outlet cylinder, and a transfer cylinder. The bottom of the second partition is provided with a second guide hole connecting the ink inlet cylinder and the transfer cylinder, and the bottom of the third partition is provided with a third guide hole connecting the transfer cylinder and the ink outlet cylinder.

[0010] Preferably, a rotating shaft is provided at the center of the bottom of the cylinder.

[0011] Preferably, a stirring shaft is provided inside the ink outlet cylinder.

[0012] Preferably, the bottom of the ink outlet cylinder is provided with an outlet shaft hole, a bearing seat is provided on the outside of the outlet shaft hole, a bearing is provided in the bearing seat, and the stirring shaft passes through the outlet shaft hole and the bearing respectively.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The first baffle increases the fluidity of ink within the ink cylinder. During use, as the amount of ink in the ink outlet cylinder decreases, ink from the ink inlet cylinder automatically replenishes it. This ink flow reduces sedimentation and stratification that occurs during the settling process, thus improving printing quality.

[0015] 2. The use of three baffles and a transfer cylinder further increases the fluidity of the ink and improves printing quality.

[0016] 3. When the automatic flow of ink is insufficient to resolve sedimentation and stratification, the cylinder can be rotated by a rotating shaft to even out the ink; alternatively, a stirring shaft can be used to stir the ink in the ink outlet cylinder. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the ink cylinder in Example 1;

[0018] Figure 2 is a structural schematic diagram of the ink cylinder from another angle in Embodiment 1;

[0019] Figure 3 is a schematic diagram of the ink cylinder in Example 2;

[0020] Figure 4 is a schematic diagram of the bottom structure of the ink cylinder in Examples 1 and 2;

[0021] Figure 5 is a schematic diagram of the ink cylinder in Example 3;

[0022] Figure 6 is a cross-sectional view of the stirring shaft and the ink outlet cylinder in Figure 5.

[0023] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] Example 1

[0026] As shown in Figure 1, an ink cylinder for a sheet-fed gravure printing machine according to this embodiment includes a cylinder body 1. A first partition 2 is disposed inside the cylinder body 1, dividing the cylinder body into an ink inlet cylinder body 3 and an ink outlet cylinder body 4. A first guide hole 21 connecting the ink inlet cylinder body 3 and the ink outlet cylinder body 4 is disposed at the bottom of the first partition 2. When adding ink to the cylinder body 1, it is added to the ink inlet cylinder body 3 and then flows into the ink outlet cylinder body 4 through the first guide hole 21 until the ink levels in the ink inlet cylinder body 3 and the ink outlet cylinder body 4 are equal. An ink-taking conduit (not shown in the figure) extends into the ink outlet cylinder body 4 and takes ink from it for printing. As the printing process proceeds, the ink in the ink outlet cylinder body 4 decreases, and the ink continuously flows into the ink outlet cylinder body 4 along the first guide hole 21, thereby making the ink flow and preventing it from accumulating in the cylinder body for a long time and forming sedimentation and stratification.

[0027] As shown in Figure 2, to accelerate the flow of ink, an inclined surface 31 is provided inside the ink inlet cylinder 3, with the flow direction facing the first guide hole 21. That is, the higher side of the inclined surface 31 is away from the first guide hole 21, and the lower side of the inclined surface 31 is close to the first guide hole 21, thereby facilitating the flow of ink.

[0028] As shown in Figure 4, this application also includes a rotating shaft 11 at the center of the bottom of the cylinder 1. The rotating shaft 11 does not extend into the cylinder 1 and is connected to the output shaft of the motor. Because different batches of printing require different ink viscosities, flowability, and printing quality requirements, when the automatic ink flow cannot meet the printing requirements, the rotating shaft 11 can be driven by the motor to rotate, thereby rotating the cylinder 1 and preventing ink sedimentation and stratification inside, thus improving printing quality. When the printing quality requirements are not high and automatic ink flow is sufficient, the motor does not need to rotate.

[0029] During the rotation of cylinder 1, in order not to interfere with the ink extraction guide tube that extends into the ink cylinder 4 and extracts ink from it, it can be rotated back and forth at a small angle, such as 20°, so as not to interfere with the ink extraction guide tube.

[0030] Example 2

[0031] As shown in Figure 3, the cylinder body is provided with a second partition 6, a third partition 7 and a fourth partition 8. The second partition 6, the third partition 7 and the fourth partition 8 divide the cylinder body 1 into an ink inlet cylinder body 3, an ink outlet cylinder body 4 and a transfer cylinder body 5. The bottom of the second partition 6 is provided with a second guide hole 61 connecting the ink inlet cylinder body 3 and the transfer cylinder body 5. The bottom of the third partition 7 is provided with a third guide hole 71 connecting the transfer cylinder body 5 and the ink outlet cylinder body 4.

[0032] With the intermediate transfer cylinder 5 in place, the ink first enters the intermediate transfer cylinder 5 from the ink inlet cylinder 3, and then enters the ink outlet cylinder 4 from the intermediate transfer cylinder 5. This further optimizes the automatic flow of ink and better prevents ink sedimentation and stratification.

[0033] In some embodiments, depending on actual needs, the cylinder block may be divided into four regions or any number of regions, all of which should be included within the scope of protection of this application.

[0034] In this embodiment, an inclined surface can also be provided inside the ink inlet cylinder 3 to improve fluidity.

[0035] As shown in Figure 4, in this embodiment, a rotating shaft 11 can also be set at the center of the bottom of the cylinder 1 to meet the requirements for higher printing quality.

[0036] Example 3

[0037] In this embodiment, the cylinder 1 can be divided into only an ink inlet cylinder 3 and an ink outlet cylinder 4, or it can be divided into an ink inlet cylinder 3, an ink outlet cylinder 4, and a transfer cylinder 5. The difference from Embodiments 1 and 2 is that in this embodiment, the cylinder 1 is no longer driven to rotate as a whole, but only the ink in the ink outlet cylinder 4 is stirred. This setting can reduce motor power and save energy.

[0038] As shown in Figure 5, an agitator shaft 41 is installed inside the ink dispensing cylinder 4. When high printing quality is required, the ink inside the ink dispensing cylinder 4 can be agitated by the agitator shaft 41 to reduce sedimentation and stratification, thereby improving printing quality.

[0039] As shown in Figure 6, the bottom of the ink dispensing cylinder 4 has an outlet shaft hole, and a bearing seat 42 is provided on the outside of the outlet shaft hole. A bearing 43 is installed inside the bearing seat 42. The bearing seat 42 can be connected to the ink dispensing cylinder 4 by bolts, and a sealing ring 44 is provided on its upper end face. The stirring shaft 41 passes through the outlet shaft hole and the bearing 43 respectively. One end of the stirring shaft 41 is located inside the ink dispensing cylinder 4, and the other end can be connected to the output shaft of the motor. The motor drives the stirring shaft 41 to rotate, thereby stirring the ink in the ink dispensing cylinder 4.

[0040] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify 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 limiting the scope of protection of this utility model.

[0042] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An ink cylinder for a sheet-fed gravure printing press, comprising a cylinder body, characterized in that: The cylinder body is provided with a first partition, which divides the cylinder body into an ink inlet cylinder body and an ink outlet cylinder body. The bottom of the first partition is provided with a first guide hole that connects the ink inlet cylinder body and the ink outlet cylinder body.

2. The ink cylinder for a sheet-fed gravure printing press according to claim 1, characterized in that, The ink inlet cylinder is provided with an inclined surface that directs the flow toward the first guide hole.

3. The ink cylinder for a sheet-fed gravure printing press according to claim 1, characterized in that, The cylinder is provided with a second partition, a third partition, and a fourth partition, which divide the cylinder into an ink inlet cylinder, an ink outlet cylinder, and a transfer cylinder. The bottom of the second partition is provided with a second guide hole connecting the ink inlet cylinder and the transfer cylinder, and the bottom of the third partition is provided with a third guide hole connecting the transfer cylinder and the ink outlet cylinder.

4. An ink cylinder for a sheet-fed gravure printing press according to claim 1, characterized in that, A rotating shaft is located at the center of the bottom of the cylinder.

5. An ink cylinder for a sheet-fed gravure printing press according to claim 1, characterized in that, The ink outlet cylinder is equipped with a stirring shaft.

6. An ink cylinder for a sheet-fed gravure printing press according to claim 5, characterized in that, The bottom of the ink outlet cylinder is provided with an outlet shaft hole, and a bearing seat is provided on the outside of the outlet shaft hole. A bearing is provided inside the bearing seat, and the stirring shaft passes through the outlet shaft hole and the bearing respectively.

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