An adjustable ink pan for a gravure printing machine

Abstract

The present application provides a kind of adjustable ink tray of gravure printing machine, comprising: ink tank (2) has a cavity containing ink;First isolation plate (5) and second isolation plate (6) are respectively arranged in the cavity of the ink tank (2) opposite two sides, and both can reciprocate along the length direction of the ink tank (2), to change the effective accommodation width of the cavity;And locking member (9) is arranged on the first isolation plate (5) and / or the second isolation plate (6), for locking and fixing the first isolation plate (5) and the second isolation plate (6) in the ink tank (2) after moving in place.The effective accommodation width of the cavity of the ink tank is accurately matched with the effective working width of the plate roller or the ink delivery roller by the synchronous movement of the two side isolation plates along the length direction of the ink tank, and only the necessary amount of ink needs to be filled to maintain normal operation.

Description

Technical Field

[0001] This invention relates to the field of printing machinery technology, specifically to an ink tray for a gravure printing machine, and more particularly to an adjustable ink tray whose effective accommodating width can be flexibly adjusted as needed. Background Technology

[0002] In gravure printing, the width of printing materials is divided into different specifications according to product requirements, and the printing roller is also selected with an appropriate length according to the width of the material. During printing, the printing roller is partially immersed in the ink tray to pick up ink, and after the excess ink is scraped off by a doctor blade, the ink is transferred to the printing material to complete the printing process.

[0003] In the prior art, for example, patent document with patent number CN214354802U discloses an ink reservoir for a gravure printing machine, which mainly addresses the problem of excessive ink carrying and untimely return when ink is running at high speed. By adding a tray between the printing plate and the ink reservoir, the amount of ink carried away by the high-speed operation of the printing plate is reduced, and additional ink return space is provided to maintain sufficient ink supply, thereby improving printing quality and production efficiency.

[0004] However, the aforementioned existing technologies and most ink trays currently on the market share a common drawback: the ink tray's capacity is fixed. In actual production, the length of the printing roller is not constant but is frequently changed according to product specifications. Because the cavity width of the ink tray is fixed, when using a shorter printing roller, it is still necessary to inject enough ink to cover the entire cavity width into the ink tray to ensure normal ink immersion operation of the printing roller. This directly leads to the following problems: (a) Significant ink waste. A large amount of ink fills the concave space outside the effective printing area of ​​the printing roller and does not participate in the actual transfer, resulting in unnecessary material consumption and increasing production costs.

[0005] (ii) Difficulty in cleaning and maintenance. When changing the printing roller or ink color, it is necessary to remove and clean the residual ink in the entire ink tray cavity. Due to the large and fixed volume of the cavity, cleaning is time-consuming and consumes a lot of solvent, increasing downtime and labor costs, and reducing production efficiency.

[0006] (iii) Decreased ink quality. The fixed volume results in an excessively large area of ​​ink exposed to air, accelerating the evaporation of solvents and surface oxidation. Oxidation not only affects the doctor blade's ink scraping effect, but the resulting film fragments also mix into the ink, forming particulate impurities, which in turn interfere with the stability and consistency of the printing process and reduce the yield.

[0007] (iv) Limited equipment versatility. The fixed structure of the ink tray cannot flexibly adapt to the installation position and ink depth requirements of different specifications of printing rollers, which limits the flexible production capacity of the equipment and makes it difficult to adapt to the modern printing production mode of multiple varieties and small batches.

[0008] Therefore, there is an urgent need in the field for an ink tray structure that can flexibly adjust the effective volume according to the actual working width of the printing roller or inking roller, thereby reducing ink waste, simplifying the cleaning process, improving printing quality and equipment adaptability. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adjustable ink tray for a gravure printing machine. By improving the structure of the ink tray itself, its effective width can be flexibly adjusted according to actual usage needs, thereby achieving on-demand ink supply and solving technical problems such as ink waste, difficult cleaning, and unstable printing quality.

[0010] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides: an adjustable ink tray for a gravure printing machine, comprising: an ink tank (2) having a cavity for receiving ink; The first isolation plate (5) and the second isolation plate (6) are respectively disposed on opposite sides of the concave cavity of the ink tank (2), and both can reciprocate along the length direction of the ink tank (2) to change the effective accommodating width of the concave cavity; And a locking element (9) for locking and securing the first isolation plate (5) and the second isolation plate (6) to the ink tank (2) after they have been moved into place.

[0011] Preferably, it further includes: a guide rail (10) and a slider (8) that slides with the guide rail (10), the guide rail (10) being fixedly installed on the ink tank (2); and a partition plate mounting component (7), the first partition plate (5) and the second partition plate (6) being fixedly connected to the corresponding slider (8) through the partition plate mounting component (7).

[0012] Preferably, the locking member (9) is installed on the isolation plate mounting member (7), and the locking member (9) abuts against the fixed part of the guide rail (10) or the ink tank (2) to achieve locking.

[0013] Preferably, a sliding sealing structure is provided between the lower edge and side edge of the first isolation plate (5) and the second isolation plate (6) and the inner wall of the ink tank (2); the ink tank (2) is a cuboid tank structure with an opening at the top, and the first isolation plate (5) and the second isolation plate (6) are vertically arranged inside the ink tank (2).

[0014] Preferably, it also includes an ink outlet (13), which is disposed on the first isolation plate (5) and / or the second isolation plate (6) for conveying ink into the cavity of the ink tank (2).

[0015] Preferably, the ink outlet (13) is disposed through the surface of the first isolation plate (5) and / or the second isolation plate (6), and the ink outlet (13) is connected to the discharge end of the external ink pump (3) through the ink supply pipeline.

[0016] Preferably, it also includes an ink return limiting port (14), which is disposed on the first isolation plate (5) and / or the second isolation plate (6) to guide ink that exceeds the position of the ink return limiting port (14) to be discharged.

[0017] Preferably, the ink return limiting port (14) is a through hole or open groove structure that is disposed through the first isolation plate (5) and / or the second isolation plate (6), and the height position of the ink return limiting port (14) on the isolation plate corresponds to the preset working liquid level height in the ink tank (2).

[0018] Preferably, it also includes an ink return port (15), which is located below the end of the ink tank (2) or on the bottom wall of the end along the length direction, for recycling the ink discharged through the ink return limiting port (14) to the external ink tank (4).

[0019] Preferably, it further includes: a doctor blade (12), said doctor blade (12) being disposed above the ink trough (2) for abutting against the end face of the printing roller during operation to scrape off the ink adhering to the end face; and / or, A cleaning agent nozzle, which is disposed on the first isolation plate (5) and / or the second isolation plate (6), is used to spray cleaning agent onto the surface of the printing roller or ink delivery roller to clean residual ink.

[0020] The present invention has the following beneficial effects and advantages: 1. Significantly reduces ink waste and lowers production costs. By synchronously moving the side partitions along the length of the ink reservoir, the effective accommodating width of the ink reservoir cavity precisely matches the effective working width of the printing roller or inking roller, requiring only the necessary amount of ink to maintain normal operation. Compared to a fixed-volume ink tray, the ink filling amount is significantly reduced, drastically lowering ink material consumption costs.

[0021] 2. Significantly simplified cleaning process, improving changeover efficiency. Due to the significantly reduced effective volume of the ink tray, the cleaning area and dead zones are minimized. Simultaneously, the movable separator can be retracted to its minimum spacing during cleaning, further reducing the cleaning area. Cleaning time can be greatly shortened, significantly improving the production efficiency of color or plate changes.

[0022] 3. Effectively improves printing quality and stability. Precisely defined ink-filling areas reduce the contact area between ink and air, slowing down solvent evaporation and ink oxidation / skinning, maintaining good ink flow and transfer properties. This facilitates even ink scraping by the doctor blade, reducing printing defects caused by ink skinning and improving print consistency and yield.

[0023] 4. Enhanced equipment versatility and flexible production capabilities. No need to replace the entire ink reel; simple manual adjustments allow for adaptation to different widths of printing rollers or inking rollers, making operation quick and easy, and significantly reducing changeover and debugging time. Particularly suitable for flexible production models with multiple product varieties and small batches.

[0024] 5. Simple and reliable structure, easy to manufacture and maintain. This invention achieves its purpose by adding a movable isolation plate and a matching guide rail slider locking mechanism inside the ink tank. The structure is simple, with few parts, low manufacturing cost, and easy to maintain and replace vulnerable parts.

[0025] 6. The ink supply and reflux functions can move synchronously with the isolation plate (preferred embodiment). As a preferred embodiment of the present invention, the ink outlet and the ink reflux limiting port are disposed on the isolation plate. When the isolation plate moves and changes the effective width of the cavity, the ink supply inlet and the liquid level control point always move accordingly, ensuring that the ink circulates precisely only within the effective working area, avoiding the problem of uneven mixing of new ink and old ink or poor local circulation caused by the fixed ink supply position.

[0026] 7. Integrated automatic cleaning agent function effectively prevents residual ink from drying and hardening on the printing rollers. Through cleaning agent nozzles mounted on the isolation plate, cleaning agent is automatically sprayed onto the surface of the printing rollers for rapid rinsing after the equipment stops, effectively dissolving and removing residual ink and preventing ink from drying and forming a film that affects the quality of subsequent prints. The cleaning process is highly automated, reducing manual intervention and improving cleaning efficiency and operational safety. Simultaneously, the cleaning agent evaporates rapidly, avoiding residual moisture from adversely affecting the printing rollers or subsequent inks, further ensuring the cleanliness and operational reliability of the printing system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the adjustable ink tray for a gravure printing machine provided by the present invention.

[0028] Figure 2 This is a schematic diagram of the bottom structure of the adjustable ink tray for a gravure printing machine provided by the present invention.

[0029] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the ink tray along the width of the ink trough.

[0030] Explanation of reference numerals in the attached figures: Printing roller (only to illustrate the usage environment of the ink tray, and is not part of this invention); 1. Printing roller 2. Ink tank 3. Ink pump 4. Ink bucket 5. First isolation plate 6. Second isolation plate 7. Isolation plate mounting component 8. Slider 9. Locking component 10. Guide rail 11. Adjusting screw 12. End face scraper 13. Ink outlet 14. Ink return limit port 15. Ink return port 16. Ink. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Example 1: Basic Adjustable Ink Disk Structure like Figure 1 As shown, the adjustable ink tray of the gravure printing machine provided by the present invention mainly includes an ink tank 2, a first isolation plate (i.e., the first isolation plate 5), a second isolation plate (i.e., the second isolation plate 6), a slider 8, a guide rail 10, and a locking component 9.

[0033] The ink tank 2 is a rectangular prism structure with an opening at the top, forming a cavity inside to accommodate ink 16. Inside the cavity of the ink tank 2, a first partition plate 5 and a second partition plate 6 are vertically arranged. The two partition plates are positioned on opposite sides of the cavity (i.e., at both ends along the length of the ink tank 2). The lower and side edges of the partition plates are in a sliding fit with the inner wall of the ink tank 2, and a sliding sealing structure is provided to prevent ink leakage from the gap between the partition plate and the tank wall. It should be understood that the sliding sealing structure is a common structure in the art and will not be described in detail further.

[0034] like Figure 2 As shown, a guide rail 10 is fixedly installed on the outer bottom or side wall of the ink tank 2, with the extension direction of the guide rail 10 parallel to the length direction of the ink tank 2. Each partition plate is fixedly connected to the corresponding slider 8 via a partition plate mounting piece 7, and the slider 8 and the guide rail 10 form a sliding engagement. Thus, the operator can manually push the partition plate to make it slide freely back and forth along the guide rail 10, thereby changing the distance between the two partition plates, that is, changing the effective accommodating width of the ink tank cavity.

[0035] The locking component 9 is installed on the isolation plate mounting component 7. After the isolation plates on both sides move to the required position along the length of the ink tank, tighten the locking component 9 so that it abuts against the fixed part of the guide rail 10 or the ink tank 2, thereby firmly locking the isolation plate onto the ink tank 2 and preventing accidental displacement due to vibration during equipment operation.

[0036] The working principle of this embodiment is as follows: Ink 16 is supplied to the cavity of ink tank 2 by an external ink supply system. Before ink supply, the operator manually adjusts the position of the two isolation plates according to the actual effective working width of the currently used printing roller 1 (or ink delivery roller, which is only shown in the figure). During adjustment, first loosen the locking piece 9, push the two isolation plates along the guide rail 10 to move towards or away from each other, so that the distance between the two isolation plates is slightly wider than the effective working width of the printing roller, and then tighten the locking piece 9 to lock it.

[0037] In this way, the effective accommodating width of the ink reservoir cavity is precisely limited to the required range. The cavity space outside this range is sealed off by the partition plate, eliminating the need for ink filling. During the rotation of the printing roller (or ink delivery roller), ink is drawn only from this effective area to complete the printing operation.

[0038] When it is necessary to change to a printing roller of different width, simply loosen the locking piece 9, readjust the position of the two isolation plates and lock them. There is no need to replace the ink tray or empty the entire ink tank.

[0039] Example 2: Preferred implementation scheme with follow-up ink supply and recirculation structure As a preferred embodiment of the present invention, such as Figure 1 and Figure 3 As shown, based on Embodiment 1, this embodiment further integrates ink supply and reflow limiting structures on the isolation plate.

[0040] The ink outlet 13 is disposed through the surface of the first isolation plate 5 and / or the second isolation plate 6 (in this embodiment, it is shown to be disposed on the second isolation plate 6). The ink outlet 13 is connected to the discharge end of the external ink pump 3 through the ink supply pipeline and is used to deliver fresh ink 16 into the concave cavity of the ink tank 2.

[0041] The ink return limiting port 14 is a through hole or slot structure that penetrates the first isolation plate 5 and / or the second isolation plate 6 (shown in this embodiment as being on the second isolation plate 6). The height of the ink return limiting port 14 on the isolation plate corresponds to the preset working liquid level height in the ink tank 2. When the ink level in the cavity exceeds the height of the limiting port, the excess ink is discharged through the limiting port into the effective working area defined by the isolation plate. It should be understood that the ink return limiting port 14 can have a certain adjustment margin in the height direction, that is, the ink height can be adjusted by blocking or opening it.

[0042] The ink return port 15 is located on the bottom wall of the ink tank 2 along its length (i.e., below the end of the ink tank). The ink return port 15 is connected to the recycling port of the external ink tank 4 through a return pipeline. The ink discharged through the ink return limiting port 14 collects along the bottom wall of the ink tank 2 to the ink return port 15, and then flows back to the external ink tank 4 for recycling.

[0043] Since both the ink outlet 13 and the ink return limiting port 14 are located on the isolation plate, when the isolation plate moves to change the effective width of the cavity, the ink supply inlet and the liquid level control point always move accordingly, ensuring that the ink circulates only within the effective working area. Regardless of how the cavity width changes, the ink inflow position and the return limiting position always maintain a precise correspondence with the effective working area, avoiding problems such as uneven mixing of new and old ink or poor local circulation caused by a fixed ink supply position.

[0044] The complete ink circulation path in this embodiment is as follows: Ink supply path: ink tank 4 → ink pump 3 → ink supply pipeline → ink outlet 13 set on the isolation plate → effective working area of ​​the concave cavity of ink tank 2.

[0045] Return path: Excess ink exceeding the height of ink return limit port 14 → Ink return limit port 14 → Ink tank end space outside the partition plate → Ink return port 15 → Return pipeline → Ink tank 4.

[0046] It should be noted that the specific arrangement of the ink supply and reflux structures on the isolation plate in this embodiment (which side of the isolation plate the ink outlet is located on, and which side of the isolation plate the reflux limiting port is located on) can be adjusted according to actual needs. For example, the two can be set on the same isolation plate, or they can be set on the isolation plates on both sides respectively. Both can achieve the technical effect of the present invention, and these variations are all within the protection scope of the present invention.

[0047] Example 3: Improved structure with end-face scraper When using a printing method that involves direct ink immersion on the printing roller, the ink is easily flung outwards from both ends of the roller due to centrifugal force during high-speed rotation, causing ink splatter. This splattered ink not only contaminates the printing materials and the surfaces of the equipment in both printing and non-printing areas, but also increases the frequency of downtime for cleaning, impacting continuous production efficiency.

[0048] To solve this problem, this embodiment adds a scraping structure based on embodiment one. For example... Figure 1 As shown, a scraper block 12 is provided above the ink tank 2, at a position corresponding to both ends of the printing roller 1. The scraper block 12 is connected to a fixed bracket (such as the side wall bracket of the ink tank 2 or an independently installed mounting bracket) via an adjusting screw 11.

[0049] The adjusting screw 11 and the doctor blade 12 can be connected by a threaded drive. By rotating the adjusting screw 11, the forward and backward displacement of the doctor blade 12 along the radial direction of the printing roller 1 can be precisely controlled, thereby adjusting the contact pressure between the doctor blade 12 and the end face of the printing roller 1. After adjustment, the doctor blade 12 presses against the end face of the printing roller 1, continuously scraping off the ink adhering to the end face during the rotation of the printing roller 1, preventing the ink from spreading and splashing outward from the end face.

[0050] The doctor blade 12 can be made of wear-resistant elastic material (such as polyurethane or wear-resistant rubber), and the part that contacts the end face of the printing roller can be set as a blade or a bevel to improve the doctoring effect and reduce wear on the surface of the printing roller.

[0051] This scraper structure works in conjunction with the adjustable ink tray of Embodiment 1: the adjustable ink tray reduces ink filling volume through a separator plate, while the scraper further ensures that ink within the defined area does not splatter from the end face. The combination of these two significantly improves the overall cleanliness and operational stability of the machine, reduces the frequency of downtime for cleaning, and enhances the stability of continuous production.

[0052] It should be noted that the doctor blade 12 and the adjusting screw 11 constitute an independent doctor blade functional module. Its location is not limited to a specific part of the ink tank 2, as long as it can form an abutment fit with the end face of the printing roller 1. Those skilled in the art can adapt the installation method of the doctor blade according to the actual equipment layout; these modifications all fall within the protection scope of this invention.

[0053] Example 4: Improved structure with automatic cleaning agent function After printing equipment stops, a thin film of ink often remains on the surface of the printing roller 1. If not cleaned promptly, the solvent in the residual ink will evaporate, and the resin and pigment in the ink will dry and form a film on the surface of the printing roller, creating a difficult-to-remove ink film layer. This ink film layer will clog the cells (inking holes on the gravure cylinder) on the surface of the printing roller, preventing the cells from filling with ink properly during the next printing, resulting in serious quality defects such as insufficient ink or missing prints. The traditional method is to manually wipe the surface of the printing roller with a cloth dipped in solvent, which is not only labor-intensive and inefficient, but also poses a safety hazard as the operator's hands are close to the rotating parts during the wiping process.

[0054] To solve this problem, this embodiment adds an automatic cleaning agent cleaning structure based on Embodiment 1. For example... Figure 1 As shown, a cleaning agent nozzle (not shown in the figure, which can be installed on the upper edge of the partition plate 6 or on the mounting bracket extending from the side wall) is installed on the second partition plate 6 (and / or the first partition plate 5). The spray direction of the cleaning agent nozzle is towards the surface of the printing roller 1, and its spray angle and spray range can be pre-adjusted according to the diameter and position of the printing roller to ensure that the cleaning agent droplets can uniformly cover the effective working area of ​​the printing roller surface.

[0055] The cleaning agent nozzles are connected to an external cleaning agent supply device (such as a cleaning agent tank and pressure pump) via cleaning agent piping. Installing the cleaning agent nozzles on the separator plate offers the following significant advantages: Because the position of the separator plate adjusts synchronously with the effective working width of the printing roller, the cleaning agent nozzles are always located at the edge of the effective working area of ​​the printing roller, and their spray angle and distance remain consistent across different printing roller widths, eliminating the need for manual readjustment of the nozzle position. Compared to fixing the nozzles outside the ink tank, this solution further simplifies changeover operations and improves the reliability of automated cleaning.

[0056] Furthermore, the present invention may also include a controller (such as a PLC or a microcontroller) electrically connected to the cleaning agent nozzle (specifically, a solenoid valve or pump body of the cleaning agent supply device). Upon detecting a device stop signal, the controller can automatically start the cleaning agent nozzle according to a preset cleaning program, controlling parameters such as spray duration, spray pressure, and spray interval. After cleaning is completed, the controller automatically stops spraying and issues a cleaning completion signal.

[0057] The working process of this embodiment is as follows: After printing is completed and the equipment is shut down, the operator can start the cleaning program via the control panel (or it can be automatically triggered by the controller). The controller first controls the printing roller to rotate at a low speed, then opens the liquid supply valve of the cleaning agent nozzle. The cleaning agent is sprayed onto the surface of the printing roller 1 in a mist form under pressure. As a powerful organic solvent, the cleaning agent can quickly penetrate and dissolve the residual ink adhering to the surface of the printing roller. The dissolved ink is removed from the surface of the printing roller under the combined action of the cleaning agent and the centrifugal force of the rotating printing roller. Because the cleaning agent evaporates very quickly, the surface of the printing roller returns to a dry state in a short time after cleaning, without any residual moisture. This avoids the risk of corrosion on the metal surface of the printing roller and also eliminates the adverse effects of moisture mixing into subsequent inks and causing ink emulsification.

[0058] During the cleaning process, the ink and cleaning agent mixture washed off the surface of the printing roller falls into the ink tank 2, and can be discharged through the ink return port 15 and collected into the waste liquid container, without polluting the internal environment of the equipment.

[0059] This automatic cleaning structure works in conjunction with the adjustable ink tray of Embodiment 1: the adjustable ink tray precisely defines the effective working area through a partition plate, while the cleaning agent nozzle is integrated into the partition plate, performing directional and precise cleaning of the printing roller during type change or machine shutdown. The combination of these two not only reduces the degree of manual intervention and improves cleaning efficiency and operational safety, but also fundamentally solves the long-standing problem of residual ink drying on the printing roller affecting printing quality.

[0060] It should be noted that the number, spray angle, and installation position of the cleaning agent nozzles can be adjusted adaptively according to the specific dimensions of the printing roller and the cleaning requirements. For example, nozzles can be installed at both ends of the printing roller to achieve full coverage cleaning of the entire roller surface, or multiple nozzles can be installed on the isolation plate to improve cleaning efficiency. All the above-mentioned modifications are simple and direct modifications of the technical solution of this invention and fall within the protection scope of this invention.

[0061] Example 5: Improved structure with operating handle To facilitate quick adjustment of the positions of the two isolation plates by operators, this embodiment features an operating handle (not shown in the figure) extending from the upper end or side wall of the first isolation plate 5 and / or the second isolation plate 6. This operating handle extends above or to the side of the opening of the ink tank 2, allowing operators to directly push and pull the isolation plates without the need for tools, further improving the efficiency of changeover and debugging.

[0062] The operating handle can be made of insulating material or metal material with anti-slip texture to ensure safe and comfortable operation.

[0063] Explanation of the applicable scope of ink trays The adjustable ink tray provided by this invention features a core improvement in its adjustable effective width structure. This structure is suitable for both direct ink supply methods, where the printing roller is directly immersed in the ink tray, and indirect ink supply methods, where ink is transferred to the printing roller via an inking roller. In the direct ink supply method, the position of the separator plate is adjusted according to the effective working width of the printing roller; in the indirect ink supply method, the position of the separator plate is adjusted according to the effective working width of the inking roller. Regardless of the ink supply method used, this invention achieves its objectives of reducing ink waste, simplifying cleaning, and improving printing quality.

[0064] Supplementary explanation regarding the layout of the ink supply and reflux structure. As described in Embodiment 2, the specific arrangement of the ink outlet 13 and the ink return limiting port 14 on the isolation plate can be flexibly designed according to actual needs. The following are several feasible variations: Method 1: The ink outlet 13 is located on the first isolation plate 5, and the ink return limiting port 14 is located on the second isolation plate 6.

[0065] Method 2: Both the ink outlet 13 and the ink return limiting port 14 are located on the same isolation plate (e.g., Figure 1 As shown, they are all set on the first isolation plate 6.

[0066] Method 3: The ink outlet 13 is located on the second isolation plate 6, and the ink return limiting port 14 is located on the first isolation plate 5.

[0067] Method 4: Both sides of the isolation plate are equipped with ink outlet 13 and ink return limit port 14.

[0068] All of the above arrangements can achieve the technical effect of synchronous movement of the ink inlet and liquid level control point with the isolation plate. They are simple and direct variations of the technical solution of this invention and all fall within the protection scope of this invention.

[0069] Industrial applicability The adjustable ink tray for gravure printing machines provided by this invention has a simple structure, is easy to operate, and has low manufacturing cost. It can significantly reduce ink waste, lower production costs, improve turnaround efficiency and printing quality. It is suitable for use with various gravure printing machines and for new machine equipment, and has broad industrial application prospects and good economic benefits.

[0070] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An adjustable ink reel for a gravure printing machine, characterized in that, include: The ink reservoir (2) has a concave cavity for receiving ink; The first isolation plate (5) and the second isolation plate (6) are respectively disposed on opposite sides of the concave cavity of the ink tank (2), and both can reciprocate along the length direction of the ink tank (2) to change the effective accommodating width of the concave cavity; And a locking element (9) for locking and securing the first isolation plate (5) and the second isolation plate (6) to the ink tank (2) after they have been moved into place.

2. The adjustable ink tray of the gravure printing machine according to claim 1, characterized in that, It also includes: a guide rail (10) and a slider (8) that slides with the guide rail (10), the guide rail (10) being fixedly installed on the ink tank (2); and a partition plate mounting component (7), the first partition plate (5) and the second partition plate (6) being fixedly connected to the corresponding slider (8) through the partition plate mounting component (7).

3. The adjustable ink tray of the gravure printing machine according to claim 2, characterized in that, The locking member (9) is installed on the isolation plate mounting member (7), and the locking member (9) abuts against the fixed part of the guide rail (10) or the ink tank (2) to achieve locking.

4. The adjustable ink tray of the gravure printing machine according to claim 1, characterized in that, The lower edge and side edge of the first isolation plate (5) and the second isolation plate (6) are provided with a sliding sealing structure between them and the inner wall of the ink tank (2); the ink tank (2) is a cuboid tank structure with an opening at the top, and the first isolation plate (5) and the second isolation plate (6) are vertically arranged inside the ink tank (2).

5. The adjustable ink tray of the gravure printing machine according to claim 1, characterized in that, It also includes an ink outlet (13), which is disposed on the first isolation plate (5) and / or the second isolation plate (6) for conveying ink into the cavity of the ink tank (2).

6. The adjustable ink tray of the gravure printing machine according to claim 5, characterized in that, The ink outlet (13) is disposed through the surface of the first isolation plate (5) and / or the second isolation plate (6), and the ink outlet (13) is connected to the discharge end of the external ink pump (3) through the ink supply pipeline.

7. The adjustable ink tray of the gravure printing machine according to claim 1, characterized in that, It also includes an ink return limiting port (14), which is disposed on the first isolation plate (5) and / or the second isolation plate (6) to guide ink that exceeds the position of the ink return limiting port (14) to be discharged.

8. The adjustable ink tray of the gravure printing machine according to claim 7, characterized in that, The ink return limiting port (14) is a through hole or opening groove structure that is disposed through the first isolation plate (5) and / or the second isolation plate (6). The height position of the ink return limiting port (14) on the isolation plate corresponds to the preset working liquid level height in the ink tank (2).

9. The adjustable ink tray of the gravure printing machine according to claim 7, characterized in that, It also includes an ink return port (15), which is located below the end of the ink tank (2) or on the bottom wall of the end along the length direction, for recycling the ink discharged through the ink return limiting port (14) to the external ink tank (4).

10. The adjustable ink tray of the gravure printing machine according to claim 1, characterized in that, Also includes: A scraper block (12), positioned above the ink reservoir (2), is used to abut against the end face of the printing roller during operation to scrape off ink adhering to the end face; and / or, A cleaning agent nozzle, which is disposed on the first isolation plate (5) and / or the second isolation plate (6), is used to spray cleaning agent onto the surface of the printing roller or ink delivery roller to clean residual ink.

Images