A printed matter surface anti-fog coating mechanism

Abstract

The utility model discloses a kind of printed matter surface anti-fog coating coating mechanism, belong to coating technical field, including the conveying mechanism for conveying cigarette case printing paper, further include heating setting roll, coating component and double air slit material scraping component, the region of the both ends of heating setting roll roll body corresponding cigarette case printing paper edge is equipped with heating element, for softening the fiber edge of cigarette case printing paper edge, the coating component is located at the downstream end of heating setting roll, for applying anti-fog coating to the surface of cigarette case printing paper after softening edge, the utility model is heated and softened after the edge of cigarette case printing paper after cutting two sides by heating setting roll, after being flattened by coating roll, cooperate with the accurate anti-fog coating of coating component located at its lower end, after being preliminarily scraped by first air slit Excess coating, second air slit refines coating thickness synergy effect, eliminate the obstruction of edge to airflow, avoid edge material, improve coating uniformity.

Description

Technical Field

[0001] This utility model relates to the field of coating technology, and in particular to a coating mechanism for applying an anti-fog coating to the surface of printed materials. Background Technology

[0002] The anti-fog coating application mechanism for printed materials is a device specifically designed to uniformly coat the surface of printed materials with an anti-fog functional coating. Its core function is to form a special film on the surface of printed materials through physical or chemical methods, making it less prone to fogging or condensation in environments with high humidity or temperature changes, thereby maintaining surface transparency and visual clarity.

[0003] In the industrial coating production of anti-fog coating for cigarette box printing paper, after the cutting process, the edges of the cigarette box printing paper inevitably have residual raised fiber burrs due to fiber cutting. Although these burrs are not easily visible to the naked eye, they directly lead to edge material accumulation defects during the anti-fog coating process. Currently, air knife coating is used, but because the edge burrs are not pre-treated, they block the airflow and form material accumulation. The raised burrs physically obstruct the airflow of a single air knife, causing the airflow to form a stagnation zone at the root of the burrs. Excess coating cannot be scraped off, and the edge coating thickness is higher than normal after drying. If the accumulated material is forcibly blown away by increasing the air knife airflow pressure, it will cause the coating in the normal area to be too thin, destroying the anti-fog performance. If the air pressure is reduced, the paper can be protected, but the accumulated material in the stagnation zone cannot be removed. Utility Model Content

[0004] This utility model provides an anti-fog coating mechanism for printed materials to solve the aforementioned technical problems.

[0005] The present invention adopts the following technical solution: it includes a conveying mechanism for conveying cigarette box printing paper, and also includes a heating and shaping roller, a coating assembly, and a double air-slit scraping assembly. The heating and shaping roller has heating elements at both ends corresponding to the edge of the cigarette box printing paper, which are used to soften the raised fiber edges of the cigarette box printing paper. The coating assembly is located at the downstream end of the heating and shaping roller and is used to apply anti-fog coating to the surface of the cigarette box printing paper after the edges have been softened. The double air-slit scraping assembly includes a first air slit and a second air slit arranged sequentially along the conveying direction. The first air slit is used to initially scrape off excess anti-fog coating from the surface of the cigarette box printing paper, and the second air slit is used to refine the thickness of the anti-fog coating after the initial scraping, so as to control the dry film thickness of the anti-fog coating.

[0006] Furthermore, the coating assembly includes a container mounted on the conveying mechanism for holding the anti-fog coating, and a coating roller is rotatably connected to the lower end of the container at the discharge chute, and the coating roller is driven by a first motor mounted on the conveying mechanism.

[0007] Furthermore, the dual-air-slot scraper assembly also includes an air supply pipe connected to an external compressed air source. The output end of the air supply pipe is connected to the first air slot and the second air slot via a three-way pipe. The three-way pipe is equipped with air pressure regulating valves corresponding to the first air slot and the second air slot, which are used to control the working air pressure of the first air slot and the second air slot.

[0008] Furthermore, the angle between the extension direction of the first air gap output end and the horizontal direction during the cigarette box printing paper feeding is 15-20°, and the angle between the extension direction of the second air gap output end and the horizontal direction during the cigarette box printing paper feeding is 30-35°.

[0009] Furthermore, the distance between the heating and shaping roller and the coating roller is less than 10 cm.

[0010] Furthermore, the heating and shaping roller is driven by a second motor mounted on the conveying mechanism, and the heating element is located in the cavity at both ends of the heating and shaping roller.

[0011] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects: In this invention, the rough edges produced after cutting the cigarette box printing paper on both sides are first softened by heating and shaping rollers. After being flattened by coating rollers, they are precisely coated with anti-fog paint by coating components located at the lower end. Then, the excess paint is initially scraped off by the first air slit and the coating thickness is refined by the second air slit. The synergistic effect of these processes eliminates the obstruction of airflow by the rough edges, avoids material accumulation at the edges, and improves the uniformity of the coating. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the double air gap scraping assembly in this utility model; Figure 4 This is a schematic diagram of the coating component in this utility model; Figure 5 A cross-sectional structural diagram of the heating and shaping roller provided by this utility model; Figure 6 A schematic diagram of the conveying direction provided by this utility model.

[0013] Figure Labels

[0014] 1. Conveying mechanism; 2. Heating and shaping roller; 21. Heating element; 3. Coating assembly; 31. Packing box; 32. Coating roller; 33. First motor; 4. Double air gap scraping assembly; 41. First air gap; 42. Second air gap; 43. Air supply pipe; 44. T-pipe; 45. Air pressure regulating valve; 5. Second motor. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] This utility model embodiment provides a coating mechanism for anti-fog coating on printed materials, including a conveying mechanism 1 (such as a conveyor belt) for conveying cigarette box printing paper. The conveying mechanism 1 includes, in sequence along its conveying direction, a heating and shaping roller 2, a coating assembly 3, and a double-air-slit scraping assembly 4. The heating and shaping roller 2 is driven by a second motor 5 mounted on the conveying mechanism 1, and its axial direction is perpendicular to the conveying direction axis of the conveying mechanism 1. Cylindrical cavities are formed at both ends corresponding to the edges of the cigarette box printing paper, and heating elements 21 are fixedly installed within these cavities. The heating elements 21 can be made of nickel-chromium alloy. The heating wire and the second motor 5 drive the heating and shaping roller 2 to rotate at a linear speed adapted to the conveying direction of the cigarette box printing paper, ensuring that the linear speed of the roller surface is synchronized with the conveying speed of the cigarette box printing paper, and avoiding relative friction damage to the cigarette box printing paper. When the two ends of the heated and shaping roller 2 come into contact with the two ends of the printing paper after heating, the burrs generated during the cutting are softened, and the anti-fog coating is pre-treated to improve the coating effect. The coating component 3 is located at the downstream end of the heating and shaping roller 2. The surface of the cigarette box printing paper after the burrs are softened is coated with anti-fog coating, and then the double air slit scraping component 4 located at the downstream end of the coating component 3 is used for air blowing scraping. Specifically, the coating assembly 3 includes a container 31 mounted on the conveying mechanism 1 for holding the anti-fog coating. A coating roller 32 is rotatably connected to the lower discharge chute of the container 31. The coating roller 32 is driven by a first motor 33 mounted on the conveying mechanism 1. The lower discharge chute of the container 31 is set as an arc shape corresponding to the curved surface of the coating roller 32. The coating roller 32 is located below the arc structure and rotates in contact with the arc structure. The anti-fog coating in the container 31 flows out from the discharge chute onto the coating roller 32 and is then rotated by the coating roller 32 onto the cigarette box printing paper below for coating. At the same time, the coating roller 32 exerts a certain pressure on the printed matter, which can tightly press the softened rough edges onto the surface of the printing paper. Furthermore, the distance between the heating and shaping roller 2 and the coating roller 32 is less than 10cm, ensuring that the burrs can be pressed by the coating roller 32 in time after softening, and preventing the burrs from curling up again after cooling.

[0018] Preferably, the double-air-slit scraping assembly 4 includes a first air slit 41 and a second air slit 42 arranged sequentially along the conveying direction. The first air slit 41 is used to initially scrape off excess anti-fog coating from the surface of the cigarette box printing paper, and the second air slit 42 is used to refine the thickness of the anti-fog coating after initial scraping to control the dry film thickness of the anti-fog coating. Both the first air slit 41 and the second air slit 42 can be made of stainless steel or other materials with strip-shaped air nozzles. The length of the air nozzles is slightly larger than the width of the cigarette box printing paper to ensure that the edge coating can also be effectively treated. The distance between the output ends of the first air slit 41 and the second air slit 42 is 2-4 cm. This distance can ensure the continuity of the two scraping processes and avoid mutual interference of airflow. After being coated by the coating assembly 3, the cigarette box printing material moves to the double-air-slit scraping assembly 4 along with the conveying mechanism 1. First, the low-pressure wide-range airflow of the first air slit 41 initially scrapes off excess coating so that the coating thickness is close to the target value. Then, the high-pressure narrow-range airflow of the second air slit 42 refines the coating and improves the coating uniformity.

[0019] The dual-air-slit scraper assembly 4 also includes an air supply pipe 43 connected to an external compressed air source. The input end of the air supply pipe 43 is sealed to the outlet of the external air source via a quick connector, and the output end is connected to the inlet of the first air slit 41 and the second air slit 42 via a three-way pipe 44. The three-way pipe 44 can be made of brass, and each of its three interfaces is equipped with a sealing gasket to ensure no leakage during gas delivery. On the branch pipes of the three-way pipe 44 corresponding to the first air slit 41 and the second air slit 42, a pressure regulating valve 45 is installed. The pressure regulating valve 45 can be rotary. A knob-type precision regulating valve or an electric regulating valve controls the air pressure regulation via a controller. In actual use, the air pressure of the first air gap 41 is adjusted to 0.1-0.2MPa. At this air pressure, the airflow intensity is moderate, which can initially scrape off most of the excess anti-fog coating on the surface without damaging the cigarette box printing paper. The air pressure of the second air gap 42 is adjusted to 0.3-0.4MPa. The concentrated airflow with higher air pressure is used to finely repair the coating surface after the initial scraping, remove residual trace amounts of uneven coating, and stabilize the dry film thickness of the anti-fog coating within the design range.

[0020] Preferably, the extension direction of the first air slit 41 is at an angle of 15-20° to the horizontal direction during the conveying of the cigarette box printing, and the extension direction of the second air slit 42 is at an angle of 30-35° to the same horizontal direction. Through this angle difference design, the airflow of the first air slit 41 is more inclined to gentle scraping, mainly acting on the excess coating on the surface of the coating, while the airflow of the second air slit 42 is more inclined to precise cutting, acting only on the slight protrusions on the surface of the coating. The two work together to form a progressive scraping effect, ultimately achieving a coating effect with uniform anti-fog coating thickness and no material accumulation at the edges.

[0021] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A coating mechanism for applying an anti-fog coating to the surface of printed materials, comprising a conveying mechanism (1) for conveying cigarette box printing paper, characterized in that, Also includes; Heating and shaping roller (2), the two ends of the heating and shaping roller (2) are provided with heating elements (21) in the area corresponding to the edge of the cigarette box printing paper, which are used to soften the raised fiber burrs on the edge of the cigarette box printing paper; Coating assembly (3), located downstream of the heated shaping roller (2), is used to apply anti-fog coating to the surface of the cigarette box printing paper after the rough edges have been softened; The dual-air-slit scraping assembly (4) includes a first air slit (41) and a second air slit (42) arranged sequentially along the conveying direction. The first air slit (41) is used to initially scrape off excess anti-fog coating from the surface of the cigarette box printing paper, and the second air slit (42) is used to refine the thickness of the anti-fog coating after initial scraping in order to control the dry film thickness of the anti-fog coating.

2. The anti-fog coating mechanism for printed materials according to claim 1, characterized in that, The coating assembly (3) includes a container (31) mounted on the conveying mechanism (1) for holding anti-fog coating. A coating roller (32) is rotatably connected to the lower end of the container (31) at the discharge chute. The coating roller (32) is driven by a first motor (33) mounted on the conveying mechanism (1).

3. The anti-fog coating mechanism for printed materials according to claim 1, characterized in that, The dual-air-slit scraper assembly (4) also includes an air supply pipe (43) connected to an external compressed air source. The output end of the air supply pipe (43) is connected to the first air slit (41) and the second air slit (42) through a three-way pipe (44). The three-way pipe (44) is equipped with an air pressure regulating valve (45) corresponding to the first air slit (41) and the second air slit (42) to control the working air pressure of the first air slit (41) and the second air slit (42).

4. The anti-fog coating mechanism for printed materials according to claim 1, characterized in that, The angle between the extension direction of the first air gap (41) output end and the horizontal direction when the cigarette box printing paper is conveyed is 15-20°, and the angle between the extension direction of the second air gap (42) output end and the horizontal direction when the cigarette box printing paper is conveyed is 30-35°.

5. The anti-fog coating mechanism for printed materials according to claim 2, characterized in that, The distance between the heating and shaping roller (2) and the coating roller (32) is less than 10cm.

6. The anti-fog coating mechanism for printed materials according to claim 1, characterized in that, The heating and shaping roller (2) is driven by a second motor (5) mounted on the conveying mechanism (1), and the heating element (21) is located in the cavity at both ends of the heating and shaping roller (2).

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