Paper cooling device based on gravure online technology

Through the inclined air curtain box and diversion member, combined with temperature control and purification devices, the problem of uneven cooling of gravure paper is solved, uniform cooling of the paper surface is achieved, and printing quality is ensured.

CN223302388UActive Publication Date: 2025-09-05GUANG XI ZHEN LONG COLOR PRINTING & PACKING CO LTD
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Patent Information

Application Number
CN202422824482.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-19
Publication Date
2025-09-05
Estimated Expiration
2034-11-19

AI Technical Summary

Technical Problem

During the gravure printing process, the problem of uneven cooling of the paper leads to poor ink adhesion, and problems such as ink peeling and falling off. The existing air-cooling device cannot effectively cover all the surface of the paper.

Method used

The first air curtain box and the second air curtain box are arranged inclined, combined with the splitter and the temperature control mechanism, to ensure that the cold air forms a stable oblique flow on the paper surface, and the air flow is refined through the splitter, to achieve uniform air cooling, adjust the angle and temperature of the air curtain, and filter impurities using a purification device.

Benefits of technology

It achieves uniform cooling of the paper surface, improves the cooling effect, avoids poor ink adhesion, and ensures stable printing quality.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a paper cooling device based on the gravure online technology, and belongs to the technical field of paper cooling, the paper cooling device comprises a box body, a paper product is conveyed in the box body through a roller, the paper cooling device further comprises an air cooling mechanism and a flow dividing piece, and the air cooling mechanism comprises a first air curtain box and a second air curtain box which are located on the two sides of the paper product; the first air curtain box and the second air curtain box are arranged in a relatively inclined mode, the inclination directions of the first air curtain box and the second air curtain box are opposite, the input ends of the first air curtain box and the second air curtain box jointly communicate with an air supply pipeline through air conveying pipelines, and the input end of the air supply pipeline communicates with external refrigeration equipment to be used for conveying cold air. According to the utility model, the first air curtain box and the second air curtain box are obliquely arranged, so that the flowing path of cold air on the surface of paper is longer, the cooling effect is improved, and after air flow is refined through the flow dividing piece, the air cooling strength of each point on the surface of a paper product is closer, and the problem of non-uniform cooling is solved.
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Description

Technical Field

[0001] The utility model relates to the technical field of paper cooling, in particular to a paper cooling device based on gravure printing online technology. Background Art

[0002] During the gravure printing process, the paper is in close contact with multiple printing components and moves at high speed. For example, the paper will be close to the gravure cylinder. When the ink is transferred, a large amount of heat will be generated due to the high-speed friction between the paper and the cylinder, and subsequent components such as the impression cylinder will also rub against the paper. The effect of these friction forces causes the temperature of the paper to gradually increase. During gravure printing, after the ink is transferred to the paper, it takes a certain amount of time to dry and solidify to ensure good adhesion. If the paper temperature is too high, it will accelerate the volatilization of the solvent in the ink, causing the ink to dry too quickly, which may cause the ink to solidify before it is fully leveled and penetrated on the paper surface, affecting the ink adhesion effect and causing problems such as ink peeling and falling off. Therefore, the paper needs to be cooled to remove the heat from the paper in time, avoid heat accumulation, and ensure the continuous and stable printing production.

[0003] Currently, when cooling gravure paper, it's common to remove heat from the paper surface through air cooling. However, because the fan outlet position and air direction are relatively fixed and uniform, wide paper can easily experience different cooling rates at the edges and center of the paper. For example, the portion of paper near the fan outlet cools faster, while the portion farther from the outlet cools less effectively. This prevents the air cooling area from fully covering the entire paper surface, resulting in uneven cooling.

[0004] To this end, we propose a paper cooling device based on gravure printing online technology to solve the above problems. Utility Model Content

[0005] The embodiment of the present utility model provides a paper cooling device based on gravure printing online technology to solve the above-mentioned technical problems.

[0006] The embodiment of the present utility model adopts the following technical solution: it includes a box body, paper products are conveyed inside the box body through rollers, and also includes an air cooling mechanism and a diverter. The air cooling mechanism includes a first air curtain box and a second air curtain box located on both sides of the paper product. The first air curtain box and the second air curtain box are relatively inclined, and the inclination directions are relatively divergent. The input ends of the first air curtain box and the second air curtain box are both connected to the air supply duct through the air delivery duct, and the input end of the air supply duct is connected to the external refrigeration equipment for conveying cold air. The diverter is installed inside the first air curtain box and the second air curtain box, and is used to refine the air-cooled airflow to achieve uniform contact with the paper product, thereby achieving comprehensive and uniform air cooling of the paper product and better cooling effect.

[0007] Furthermore, the diverter includes at least two separation plates, each of which is provided with through holes, and the through holes on at least two of the separation plates are staggered with each other, so that the airflow can be more fully mixed when passing through the separation plates, so that the airflow can be more finely homogenized and refined.

[0008] Furthermore, the first air curtain box and the second air curtain box are both rotatably connected to the box body through a rotating rod, and a connecting sleeve with a polygonal cross-section is provided on the side of the first air curtain box and the second air curtain box away from the rotating rod. An adjustment column is threadedly connected to the box body, and one end of the adjustment column is provided with a sleeve portion that is slidably connected to the connecting sleeve, so as to facilitate adjustment of the inclination angle of the first air curtain box and the second air curtain box according to usage requirements.

[0009] Furthermore, an angle indicator line is provided on the box body, and an indicator needle is provided on the adjustment column, so as to accurately know the tilt angle values ​​of the first air curtain box and the second air curtain box after adjustment.

[0010] Furthermore, it also includes a temperature control mechanism, which includes a first temperature sensor arranged in the air cooling mechanism, a second temperature sensor arranged outside the box, and a controller electrically connected to the first temperature sensor and the second temperature sensor, so as to avoid a large temperature difference between the inside and outside of the box, which may cause condensation water droplets to drip onto the paper products.

[0011] Furthermore, a purification box is provided on the air supply duct, and a filter core is detachably connected to the interior of the purification box to purify and filter the cold air blown to the paper product to reduce the adhesion of impurities.

[0012] At least one of the above technical solutions adopted in the embodiment of the present utility model can achieve the following beneficial effects:

[0013] In the present invention, the inclined arrangement of the first air curtain box and the second air curtain box allows the cold air to have a longer path on the paper surface, thereby achieving a better cooling effect. At the same time, the cold air can cooperate with the upper and lower surfaces of the paper product, ensuring that all parts of the paper product are covered and can be cooled by air from two directions. Moreover, after the air flow is refined by the diverter, the air cooling intensity received by each point on the surface of the paper product can be closer, thereby solving the problem of uneven cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model Figure 2 ;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the utility model when the adjusting column and the connecting sleeve are separated;

[0019] Figure 5 This is a structural diagram of the utility model in which the diverter is installed in the first air curtain box;

[0020] Figure 6 It is a structural schematic diagram of the indicator needle and angle indicator line in the utility model.

[0021] Reference numerals

[0022] Box body 1, roller 11, paper product 12, first air curtain box 2, second air curtain box 3, air duct 4, air supply duct 41, diverter 5, separation plate 51, through hole 52, rotating rod 6, connecting sleeve 61, adjusting column 62, sleeve portion 63, angle indicator line 7, indicator needle 71, first temperature sensor 8, second temperature sensor 81, controller 82, purification box 9, filter element 91. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0024] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] The present invention provides a paper cooling device based on gravure printing online technology, including a box body 1, wherein a paper product 12 is conveyed inside the box body 1 through a roller 11. In order to cool the paper product 12 after gravure printing, the box body 1 also includes an air cooling mechanism and a diverter 5. The air cooling mechanism includes a first air curtain box 2 and a second air curtain box 3 located on both sides of the paper product 12. The air outlet direction of the first air curtain box 2 and the second air curtain box 3 is toward the surface of the paper product 12. Figure 3When the paper product 12 is transported horizontally, the first air curtain box 2 and the second air curtain box 3 can be respectively located on the upper and lower surfaces of the paper product 12 for blowing air. The first air curtain box 2 and the second air curtain box 3 are relatively inclined. When blowing obliquely toward the paper product 12, the cold air does not simply hit the surface of the paper product 12 vertically and then rebound, but enables the cold air to flow along the surface of the paper, thereby increasing the flow range of the cold air on the surface of the paper product 12 and improving the cooling effect. The first air curtain box 2 and the second air curtain box 3 are staggered with each other and the inclined directions are relatively divergent. For example, the air outlet of the first air curtain box 2 is inclined downward, and the air outlet of the second air curtain is inclined upward. After the downward-inclined upper air curtain and the upward-inclined lower air curtain intersect, the cold air will flow obliquely along the surface of the paper. , after the inclined air curtains cross, the airflow forms a relatively stable oblique laminar flow on the surface of the paper, which helps to reduce the turbulence and vortex formation of the airflow. Since the cold air is blown obliquely through the paper product 12, the pressure changes formed on the upper and lower surfaces of the paper product 12 are relatively gentle. Compared with the relatively vertical air curtains, a large air pressure difference may be generated in the local area, which has an adverse effect on the flatness and stability of the paper. The input ends of the first air curtain box 2 and the second air curtain box 3 are both connected to the air supply duct 41 through the air supply duct 4, and the input end of the air supply duct 41 is connected to the external refrigeration equipment for the transportation of cold air. The refrigeration equipment can be an air conditioner, an air cooler or other device that can provide cooling airflow, to transport the cold airflow through the air supply duct 4 to the first air curtain box 2 and the second air curtain box 3;

[0026] The diverter 5 is installed inside the first air curtain box 2 and the second air curtain box 3 to refine the cooling airflow to achieve uniform contact with the paper product 12, ensuring that the cooling intensity at each point on the surface of the paper product 12 is closer, thereby solving the problem of uneven cooling.

[0027] Preferably, the diverter 5 includes at least two separation plates 51, each of which is provided with a through hole 52, and the through holes 52 on at least two separation plates 51 are staggered with each other. The first layer of separation plates 51 close to the air duct 4 initially divides the large airflow into small streams, so that the airflow is uniform to a certain extent. The second layer of separation plates 51 further refines and adjusts the direction and speed of these small airflows to make the airflow more regular. This uniform and fine airflow can better fit the surface of the paper product 12, increase the contact area with the paper product 12, and the heat exchange between the cold air and the paper product 12 is more sufficient, which can take away the heat of the paper faster and improve the cooling efficiency.

[0028] Preferably, the first air curtain box 2 and the second air curtain box 3 are both rotatably connected to the box body 1 through a rotating rod 6, and a connecting sleeve 61 with a polygonal cross-section is provided on the side of the first air curtain box 2 and the second air curtain box 3 away from the rotating rod 6. An adjusting column 62 is threadedly connected to the box body 1, and one end of the adjusting column 62 is provided with a sleeve portion 63 that is slidably connected to the connecting sleeve 61. The adjusting column 62 is rotated to drive the sleeve portion 63 to rotate, thereby driving the first air curtain box 2 or the second air curtain box 3 to swing, thereby adjusting the air outlet angle of the first air curtain box 2 or the second air curtain box 3. For example, for thick cardboard, the outlet can be adjusted. The wind angle is adjusted to be more inclined to increase the penetration path of cold air inside the paper; for thin paper, the angle can be relatively gentle to prevent the paper from being deformed due to excessive wind force. When the adjusting column 62 is rotated, since the adjusting column 62 is threadedly connected to the box body 1, the adjusting column 62 will not rotate without external force. The adjusting column 62 can extend to the inside or outside of the connecting sleeve 61 when rotating, and the cross-section of the sleeve 63 and the connecting sleeve 61 is polygonal. The adjusting column 62 will not rotate in the connecting sleeve 61, but will drive the connecting sleeve 61 to rotate synchronously, thereby realizing the swing of the first air curtain box 2 or the second air curtain box 3;

[0029] It should be noted that the air delivery duct 4 can be a hose in its entirety or partially so as not to affect the swing of the first air curtain box 2 or the second air curtain box 3 .

[0030] Preferably, an angle indicator line 7 is provided on the box body 1, and an indicator needle 71 is provided on the adjustment column 62. Through the value on the angle indicator line 7 pointed by the indicator needle 71, the air outlet angle of the first air curtain box 2 or the second air curtain box 3 after adjustment can be known more accurately.

[0031] Preferably, a temperature control mechanism is also included, which includes a first temperature sensor 8 provided in the air cooling mechanism, a second temperature sensor 81 provided on the outside of the box body 1, and a controller 82 electrically connected to the first temperature sensor 8 and the second temperature sensor 81. The first temperature sensor 8 can be installed in the air duct 4 or the air supply duct 41 to detect the temperature of the cold air flow, and the second temperature sensor 81 can detect the room temperature in the working environment, and the cooling temperature can be 1-3 degrees Celsius lower than the room temperature to avoid a large temperature difference, resulting in condensed water droplets dripping on the paper product 12 and affecting the production quality. When the second temperature sensor 81 detects that the room temperature is high, it can transmit a signal to the controller 82. The controller 82 analyzes that the temperature difference threshold between the first temperature sensor 8 and the second temperature sensor 81 exceeds the set threshold, and can control the refrigeration mechanism to increase the temperature of the cold air to reduce the temperature difference phenomenon.

[0032] Preferably, a purification box 9 is provided on the air supply duct 41, and a filter element 91 is detachably connected to the interior of the purification box 9. The filter element 91 can use a non-woven fabric filter element or a glass limit filter element to effectively filter out dust, fluff and other impurities in the air. This can prevent impurities from being blown onto the paper with the wind curtain, prevent the paper from being contaminated, and ensure printing quality. When the filtering state of the filter element 91 reaches saturation, the filter element 91 can be disassembled and replaced to obtain a more efficient filtering effect.

[0033] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A paper cooling device based on gravure printing online technology, comprising a box (1), wherein a paper product (12) is conveyed inside the box (1) via a roller (11), characterized in that: Also includes; An air cooling mechanism, the air cooling mechanism comprising a first air curtain box (2) and a second air curtain box (3) located on both sides of a paper product (12), the first air curtain box (2) and the second air curtain box (3) being arranged to be tilted relative to each other, and the tilting directions are relatively divergent, the input ends of the first air curtain box (2) and the second air curtain box (3) are both connected to an air supply duct (41) through an air delivery duct (4), and the input end of the air supply duct (41) is connected to an external refrigeration device for conveying cold air; A flow divider (5) is installed inside the first air curtain box (2) and the second air curtain box (3) and is used to refine the cooling air flow to achieve uniform contact with the paper product (12).

2. The paper cooling device based on gravure printing online technology according to claim 1, characterized in that: The flow dividing member (5) comprises at least two separation plates (51), each of which is provided with a through hole (52), and the through holes (52) on at least two of the separation plates (51) are staggered with respect to each other.

3. The paper cooling device based on gravure printing online technology according to claim 1, characterized in that: The first air curtain box (2) and the second air curtain box (3) are both rotatably connected to the box body (1) via a rotating rod (6), and a connecting sleeve (61) with a polygonal cross section is provided on the side of the first air curtain box (2) and the second air curtain box (3) away from the rotating rod (6), an adjusting column (62) is threadedly connected to the box body (1), and one end of the adjusting column (62) is provided with a sleeve portion (63) slidably connected to the connecting sleeve (61).

4. The paper cooling device based on gravure printing online technology according to claim 3, characterized in that: An angle indicating line (7) is provided on the box body (1), and an indicating needle (71) is provided on the adjusting column (62).

5. The paper cooling device based on gravure printing online technology according to claim 1, characterized in that: The invention also includes a temperature control mechanism, which includes a first temperature sensor (8) arranged in the air cooling mechanism, a second temperature sensor (81) arranged outside the box (1), and a controller (82) electrically connected to the first temperature sensor (8) and the second temperature sensor (81).

6. The paper cooling device based on gravure printing online technology according to claim 1, characterized in that: The air supply duct (41) is provided with a purification box (9), and a filter core (91) is detachably connected to the interior of the purification box (9).