A water-blocking and drying device for water-based ink printing equipment

Abstract

This utility model discloses a water-blocking and drying device for water-based ink printing equipment, including a bottom roller that can be close to or separated from the printing plate roller, and at least one set of water-blocking and drying modules. Each set of water-blocking and drying modules includes a water-blocking roller shutter that can be unwound or rewound, and an air nozzle for blowing compressed gas. The water-blocking roller shutter is inserted into the separation gap between the bottom roller and the printing plate roller by unwinding and moving downwards, or rewinding and moving upwards, thereby separating the bottom roller and the printing plate roller through the water-blocking roller. The air nozzle is aligned with the roller surface of the printing plate roller.

Description

Technical Field

[0001] This utility model relates to the technical field of cleaning devices, and in particular to a water-blocking and drying device for water-based ink printing equipment. Background Technology

[0002] Water-based ink printing equipment is a core component of industries such as packaging and paper processing. It transfers ink to the paper web through the coordinated action of the bottom roller and the printing plate roller. During continuous printing, ink, paper scraps, and moisture inevitably remain on the surface of the printing plate roller. If not cleaned promptly, this can easily lead to blurred patterns, misregistration, and even paper contamination, severely impacting product quality. Therefore, efficient cleaning of the printing plate roller is crucial for ensuring the continuity and stability of water-based ink printing.

[0003] In response to the shortcomings of the prior art, the applicant proposed a water-based ink printing cleaning device as described in patent "CN115782400A A water-based ink printing device with an online cleaning device". Although it adopts an integrated structural design to achieve the effects of water blocking and drying, it still has problems such as insufficient overall coordination and insufficient water droplet recycling effect.

[0004] Therefore, developing an integrated device that can complete water blocking, drying, and water droplet recycling online without disassembling the printing roller, in order to shorten cleaning time, improve cleaning efficiency, and reduce manual intervention, has become a key issue that urgently needs to be solved in the field of water-based ink printing equipment technology. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a water-blocking and drying device for water-based ink printing equipment that is compact in structure, highly efficient, and integrates water-blocking and drying functions.

[0006] To achieve the above objectives, the present invention provides a water-blocking and drying device for water-based ink printing equipment, comprising a bottom roller that can be close to or separated from the printing plate roller, and at least one set of water-blocking and drying modules. Each set of water-blocking and drying modules includes a water-blocking roller shutter that can be unwound or rewound, and an air nozzle for blowing compressed gas. The water-blocking roller shutter is inserted into the separation gap between the bottom roller and the printing plate roller by unwinding and moving downwards, or rewinding and moving upwards, thereby separating the bottom roller and the printing plate roller through the water-blocking roller. The air nozzle is aligned with the roller surface of the printing plate roller.

[0007] Furthermore, each of the water-blocking and air-drying modules also includes a drain trough, which is equipped with a swing drive unit that drives it to swing. The drain trough can swing to the bottom of the water-blocking roller shutter in the retracted state to catch the dripping water droplets, and swing to avoid them during the unwinding or rewinding of the water-blocking roller shutter.

[0008] Furthermore, the swing drive unit is also used to drive the air nozzle to swing synchronously with the drain trough, wherein the air nozzle swings to align with the roller surface of the printing plate roller during the unwinding or rewinding of the water-blocking roller curtain.

[0009] Furthermore, the swing drive unit includes a fixed-axis swing arm and a telescopic unit. The telescopic end of the telescopic unit is pivotally connected to one end of the swing arm, and the drain groove and the air nozzle are both installed on the swing arm.

[0010] Furthermore, it includes a bottom roller and two printing plate rollers respectively arranged on both sides of the bottom roller, as well as two sets of water-blocking and air-drying modules, wherein a separation gap is formed between the two bottom rollers and the printing plate rollers, and the two water-blocking and air-drying modules correspond to the two separation gaps respectively.

[0011] The present invention adopts the above-mentioned solution, and its beneficial effects are as follows: 1) High-efficiency water blocking and drying integration: the water is physically separated by the water-blocking roller curtain, and the air nozzle is used for directional drying. The dual effect improves the efficiency of roller surface cleaning and avoids printing pollution; 2) Coordinated water droplet recycling: the drain trough dynamically receives water droplets with the swing drive unit, preventing them from dripping into the equipment and improving the cleanliness of the environment; 3) Compact structure and strong compatibility: the modular design can be adapted to single / double printing roller structures, and the swing drive unit synchronously links the drain trough and the air nozzle, simplifying the equipment control logic. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the water-blocking and drying device in an embodiment.

[0013] Figure 2-5 This is a schematic diagram of the operation of the water-blocking and drying device in an embodiment.

[0014] Figure 6 This is a schematic diagram of a water-blocking and drying device according to another embodiment.

[0015] Figure 7-10 A schematic diagram of the operation of a water-blocking and drying device according to another embodiment. Among them, 1-air switch, 2-display screen, 3-channel control button, 4-bypass button, 5-channel indicator light, 6-bypass indicator light, 7-sequence switch, 8-central control interface, 9-cascade interface, 10-external high and low level switch, 11-output socket, 12-input power interface. Detailed Implementation

[0016] To more fully illustrate this utility model, a detailed description will be provided below in conjunction with the accompanying drawings. The drawings depict preferred embodiments of this utility model. However, it is worth noting that this utility model is not limited to these specific forms and can be implemented in various ways. These embodiments are provided to enable the reader to gain a deeper understanding of this utility model.

[0017] As attached Figure 1-5 As shown, in this embodiment, a water-blocking and drying device for water-based ink printing equipment includes a bottom roller 1 that can be close to or separated from the bottom roller, a printing plate roller 2 (the printing plate roller 2 is arranged on one side of the bottom roller 1), and a set of water-blocking and drying modules. The water-blocking and drying device in this embodiment is activated when the printing plate roller 2 is separated from the bottom roller 1. Through the synergistic effect of water blocking, drying and draining, the device achieves efficient treatment of moisture on the roller surface.

[0018] In this embodiment, a cleaning assembly is also provided for the printing roller 2. Specifically, the cleaning assembly includes a spray nozzle 7 and a cleaning brush 6. The spray nozzle 7 faces the roller surface of the printing roller 2 and is used to spray cleaning liquid. The cleaning brush 6 is installed downstream of the spray nozzle 7 and is equipped with a cleaning drive unit 13 that drives it to approach or move away from the roller surface of the printing roller 2. Here, the cleaning drive unit 13 is preferably a cylinder. The cleaning brush 6 contacts the roller surface of the printing roller 2 to remove stains from the roller surface. The cleaning assembly works in conjunction with the water-blocking and drying module. It can not only block water during the cleaning process to prevent cleaning liquid from splashing onto the roller surface of the bottom roller 1 and the paper material wrapped around the roller surface of the bottom roller 1, but also quickly dry the printing roller 2 after cleaning to ensure that the roller surface is dry, avoid residual moisture from affecting the subsequent printing quality, and improve the cleaning effect and drying efficiency.

[0019] In this embodiment, the water-blocking drying module includes a water-blocking roller shutter 3 that can be unwound or rewound, and an air nozzle 4 for blowing out compressed gas. The water-blocking roller shutter 3 can be made of a flexible waterproof material, such as a polytetrafluoroethylene film resistant to water and ink corrosion. No specific limitation is made here, and those skilled in the art can choose a suitable material as needed. The water-blocking roller shutter 3 can be wound on a roller driven by a servo motor (not shown in the figure) to realize automatic unwinding and rewinding. When unwinding, the water-blocking roller shutter 3 moves vertically downward, and when rewinding, the water-blocking roller shutter 3 moves vertically upward and is wound back to the initial position. Secondly, in order to enhance the stability of the water-blocking roller shutter 3, a magnet block (which also serves as a counterweight block) can be added to its end. The magnet block is attracted to the metal bracket (not shown in the figure) on the side of the printing plate roller 2, ensuring that the water-blocking roller shutter 3 remains stable and vertical in the unwinding state, effectively preventing the cleaning liquid and water from diffusing towards the bottom roller 1. Secondly, the air nozzle 4 (external air compressor source, not shown in the figure) is located above the printing plate roller 2. The air nozzle 4 is aligned with the roller surface of the printing plate roller 2 to blow compressed air onto the printing plate, thereby effectively blowing away the residual moisture on the roller surface.

[0020] In this embodiment, each water-blocking drying module also includes a drain trough 5. The length of the drain trough 5 is greater than the width of the water-blocking roller shutter 3, and the width of the drain trough 5 is greater than the thickness of the water-blocking roller shutter 3, to ensure that the drain trough 5 can completely cover the area below the water-blocking roller shutter 3, facilitating the collection of cleaning liquid and water. Secondly, the drain trough 5 can be designed with its bottom tilted to one side (slope of 5°) to facilitate the tilting out of the collected water. Alternatively, a drain hole can be opened at the low point of the trough to connect a drain pipe for rapid drainage, avoiding water accumulation that could cause secondary pollution or equipment corrosion. Furthermore, the drain trough 5 is equipped with a swing drive unit 8 to drive its swing. The drain trough 5 can swing to the bottom of the water-blocking roller shutter in the retracted state to collect dripping water droplets, and swing to avoid them during the unwinding or rewinding of the water-blocking roller shutter. Specifically, the swing drive unit 8 in this embodiment includes a fixed-axis swing arm and a telescopic unit (using a pneumatic cylinder). One end of the swing arm is pivotally connected to the telescopic end of the cylinder, and the other end is used for the fixed installation of the drain trough 5. The extension and retraction of the cylinder drives the swing arm to rotate around a fixed axis (swing angle range 0°-60°), realizing the swing switching of the position of the drain trough 5. When the water-blocking roller shutter 3 is unwinding or rewinding, the drain trough 5 swings to the outside of the avoidance area so as not to hinder the vertical movement of the water-blocking roller shutter 3; when the water-blocking roller shutter 3 is in the rewinding state, the drain trough 5 quickly switches to below it through the swing drive unit 8 to receive the subsequent dripping cleaning liquid or water.

[0021] Furthermore, the swing drive unit 8 is also used to drive the air nozzle 4 to swing synchronously with the drain trough 5. That is, the air nozzle 4 and the drain trough 5 are fixed on the same swing arm structure, and the swing switching is completed synchronously with the extension and retraction of the cylinder. This design allows the air nozzle 4 to swing towards the surface of the printing plate roller 2 during the unwinding or rewinding of the water-blocking roller 3. After the water-blocking roller 3 is unwinding and cleaning is completed, the air nozzle 4 can start the air compressor to supply air and blow it towards the surface of the printing plate roller 2, thereby achieving efficient removal of moisture from the surface of the printing plate roller 2.

[0022] For easier understanding, please refer to the appendix. Figure 2-5 As shown in 7-10, further explanations and clarifications are provided in conjunction with the specific workflow.

[0023] Step A1: Separation and Water Blocking Preparation When cleaning is required, the printing roller 2 moves laterally under external drive, separating from the bottom roller 1 to form a separation gap. At this time, the swing drive unit 8 drives the drain trough 5 and the air nozzle 4 to swing synchronously outside the avoidance area so that the drain trough 5 and the air nozzle 4 avoid the unwinding path of the water-blocking roller 3, and so that the air nozzle 4 is aligned with the surface of the printing roller 2. Subsequently, the water-blocking roller 3 starts to unwind and moves down to insert into the separation gap, thereby separating the space between the printing roller 2 and the bottom roller 1, forming a water-blocking barrier.

[0024] Step A2: Washing and Drying The cleaning unit is activated to spray cleaning fluid onto the surface of the printing roller 2 (during cleaning, the printing roller 2 rotates at a low speed). After cleaning is completed, the air nozzle 4 starts the air compressor to supply air and blows it onto the surface of the printing roller 2 for efficient removal (during removal, the printing roller 2 rotates at a low speed) until the residual moisture on the surface of the printing roller 2 is completely blown away.

[0025] Step A3: Draining and Resetting After the blowing operation is completed, the water-blocking roller shutter 3 starts its rewinding action, gradually moving upwards to disengage from the separation gap and return to its initial position. Simultaneously, the swing drive unit 8 activates again, driving the drain trough 5 and air nozzle 4 to swing synchronously below the water-blocking roller shutter 3 to catch any remaining water droplets or cleaning liquid that may drip. In summary, the water-blocking roller shutter 3 physically separates the water, while the air nozzle 4 blows it dry in a directional manner. This dual action improves the efficiency of roller surface cleaning and avoids printing contamination. At the same time, the drain trough 5 dynamically catches water droplets with the swing drive unit 8, preventing them from dripping into the equipment and improving environmental cleanliness. Furthermore, this structural design has good adaptability, allowing adjustment of the swing angle and air blowing position according to different specifications of printing rollers 2 to ensure consistent cleaning results. Through the coordinated operation of the above steps, the cleaning process of the printing roller 2 is achieved in a highly efficient, precise, and environmentally friendly manner.

[0026] In another embodiment, as shown in the appendix Figure 2-10 As shown, the equipment structure for the dual printing rollers 2 can be adapted and improved. Specifically, it includes a bottom roller 1, two printing rollers 2 respectively arranged on both sides of the bottom roller 1, and two sets of water-blocking and drying modules. That is, each set of water-blocking and drying modules corresponds to one printing roller 2. A separation gap is formed between each of the two bottom rollers 1 and the printing roller 2, and the two water-blocking and drying modules correspond to the separation gap respectively. With this configuration, the dual printing rollers 2 can be cleaned and dried simultaneously, greatly improving equipment utilization and cleaning efficiency.

[0027] Furthermore, after the printing rollers 2 on both sides separate from the bottom roller 1, the two sets of water-blocking and drying modules start simultaneously, respectively completing the water-blocking, drying, and draining actions on the corresponding sides, as shown in the attached diagram. Figure 7-10 The working steps shown are consistent with A1-A3 in the aforementioned embodiment, realizing bidirectional synchronous processing and improving equipment operating efficiency.

[0028] In summary, the water-blocking and drying device of the water-based ink printing equipment in this embodiment can be flexibly adapted to the structure of a single printing roller 2 or a double printing roller 2. The water-blocking and drying device realizes the automated treatment of moisture on the roller surface of the water-based ink printing equipment, greatly improves the water blocking efficiency, shortens the drying time compared with the traditional method, and eliminates water droplet contamination inside the equipment, thus significantly improving printing quality and equipment reliability.

[0029] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any modifications or alterations made by those skilled in the art to the technical solution of this utility model without departing from its scope are equivalent embodiments of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from its scope should be covered within the protection scope of this utility model.

Claims

1. A water blocking and drying device for water-based printing equipment, comprising a bottom roller (1) and at least one printing plate roller (2) that can be close or separated, characterized in that: It also includes at least one set of water-blocking drying modules, each set of water-blocking drying modules including a water-blocking roller shutter (3) that can be unwound or rewound, and an air nozzle (4) for blowing out compressed gas, wherein the water-blocking roller shutter (3) is inserted into the separation gap between the bottom roller (1) and the printing plate roller (2) by unwinding and moving down or rewinding and moving up, thereby separating the bottom roller (1) and the printing plate roller (2) by water-blocking roller shutter; the air nozzle (4) is aligned with the roller surface of the printing plate roller (2).

2. The water-blocking and drying device for water-based ink printing equipment according to claim 1, characterized in that: Each of the water-blocking and air-drying modules also includes a drain trough (5), which is equipped with a swing drive unit (8) to drive it to swing. The drain trough (5) can swing to the bottom of the water-blocking roller shutter in the retracted state to catch the dripping water droplets, and swing to avoid the water droplets during the unwinding or rewinding of the water-blocking roller shutter.

3. The water-blocking and drying device for water-based ink printing equipment according to claim 2, characterized in that: The swing drive unit (8) is also used to drive the air nozzle (4) to swing synchronously with the drain trough (5), wherein the air nozzle (4) swings to align with the roller surface of the printing plate roller (2) during the unwinding or rewinding of the water-blocking roller curtain.

4. The water-blocking and drying device for water-based ink printing equipment according to claim 3, characterized in that: The swing drive unit (8) includes a fixed-axis swing arm and a telescopic unit. The telescopic end of the telescopic unit is pivotally connected to one end of the swing arm. The drain groove (5) and the air nozzle (4) are both installed on the swing arm.

5. The water-blocking and drying device for water-based ink printing equipment according to claim 3, characterized in that: It includes a bottom roller (1) and two printing plate rollers (2) respectively arranged on both sides of the bottom roller (1), as well as two sets of water-blocking and air-drying modules. A separation gap is formed between the two bottom rollers (1) and the printing plate rollers (2), and the two water-blocking and air-drying modules correspond to the two separation gaps respectively.

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