Cigarette boxes and cigarette box adhesive application device

Abstract

This application relates to the field of tobacco packaging technology, and in particular to a cigarette box and a cigarette box adhesive application device. A cigarette box includes a first plate, a second plate, and a third plate, with the second and third plates connected to the two ends of the first plate along its length. A first side plate and a second side plate are disposed on both sides of the first plate along its width, with the first side plate positioned close to the second plate and the second side plate positioned close to the third plate. A third side plate is disposed on each side of the second plate, and a fourth side plate is disposed on each side of the third plate. The first and second side plates have multiple spaced and recessed wavy textures. The third side plate can be bonded to the first side plate, and the fourth side plate can be bonded to the second side plate. The wavy textures occupy at least 40% of the surface area of ​​the first and second side plates. This application, by providing recessed wavy textures occupying at least 40% of the surface area of ​​the first and second side plates, can enhance the uniformity of adhesive adhesion and increase the adhesive adhesion area, thereby effectively reducing the rate of cigarette box bursting.

Description

Technical Field

[0001] This application relates to the field of tobacco packaging technology, and in particular to a cigarette box and a cigarette box adhesive applicator. Background Technology

[0002] In the tobacco packaging industry, slim cigarettes are experiencing increasing market demand due to their low tar content and fashionable appeal. However, compared to regular cigarettes, slim cigarettes have smaller and thinner packs, which means that the paper packaging area must withstand greater mechanical stress and presents higher technical challenges during high-speed packaging using paper.

[0003] Currently, the industry generally uses adhesive bonding to bond paper to form cigarette boxes for slim cigarettes. However, the existing gluing system design and adhesive bonding process have insufficient glue application during the gluing process of cigarette box paper, and the glue layer thickness is uneven. Under the high-speed and high-stress packaging environment, the paper will peel off due to poor adhesion and uneven glue layer distribution, resulting in a high rate of box bursting during the manufacturing process of cigarette boxes. Utility Model Content

[0004] Therefore, it is necessary to provide a cigarette box and a cigarette box adhesive application device that can reduce the rate of cigarette box bursting.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] A cigarette case includes a first plate, a second plate, and a third plate. Along the length of the first plate, the second plate and the third plate are connected to both ends of the first plate and are foldable relative to the first plate. Along the width of the first plate, a first side plate and a second side plate are respectively provided on both sides of the first plate. Along the length of the first plate, the first side plate is positioned close to the second plate, and the second side plate is positioned close to the third plate. A third side plate is provided on both sides of the second plate, and a fourth side plate is provided on both sides of the third plate. Both the first and second side plates are foldable relative to the first plate, the third side plate is foldable relative to the second plate, and the fourth side plate is foldable relative to the third plate. The surfaces of the first and second side plates are each provided with a plurality of recessed, diagonally arranged wavy textures spaced apart along the length of the first plate. The surfaces of the third and fourth side plates are each coated with an adhesive. When the second plate is folded relative to the first plate and the third plate is folded relative to the first plate, the third side plate is bonded to the first side plate by the adhesive, and the fourth side plate is bonded to the second side plate by the adhesive.

[0007] The wave texture occupies at least 40% of the surface area of ​​the first side plate and the second side plate.

[0008] It is understood that this application, by providing recessed wavy textures at intervals on the first and second side panels, and ensuring that the wavy textures occupy at least 40% of the surface area of ​​the first and second side panels, utilizes the spaced wavy textures to accommodate adhesive when the third side panel is bonded to the first side panel and when the fourth side panel is bonded to the second side panel. This enhances the uniformity of adhesive adhesion, and by ensuring that the wavy textures occupy at least 40% of the surface area of ​​the first and second side panels, it increases the adhesive adhesion area. Thus, by enhancing the uniformity of adhesive adhesion and increasing the adhesive adhesion area, the rate of cigarette box breakage can be effectively reduced.

[0009] In one embodiment, the spacing between two adjacent recessed wavy textures is d1, and 1.5mm≤d1≤2.5mm.

[0010] In one embodiment, the depth of the wave texture of each depression is h, where 0.2 mm ≤ h ≤ 0.5 mm.

[0011] In one embodiment, the tilt angle of each wave texture relative to the length direction of the first plate is A, where 40°≤A≤50°.

[0012] In one embodiment, the cigarette box is made of trademark paper with a coefficient of friction of μ, where 0.16 ≤ μ ≤ 0.17.

[0013] This application also provides the following technical solutions:

[0014] A cigarette box gluing device is used to apply glue to the cigarette box in the above embodiment.

[0015] The cigarette box gluing device includes a rotating shaft and at least two gluing rollers, with the at least two gluing rollers spaced apart on the rotating shaft. Each gluing roller has a blank area, a first gluing area, and a second gluing area on its outer peripheral surface. The first gluing area is adapted to the third side plate and is used to apply glue to the surface of the third side plate. The second gluing area is adapted to the fourth side plate and is used to apply glue to the surface of the fourth side plate.

[0016] In one embodiment, the adhesive roller has a plurality of first adhesive holes in the first adhesive application area and a plurality of second adhesive holes in the second adhesive application area, wherein both the first adhesive holes and the second adhesive holes are used to contain adhesive.

[0017] In one embodiment, the diameter of the second adhesive application hole is d2, where 1.4mm≤d2≤1.6mm.

[0018] Understandably, by setting the diameter of the second adhesive hole to 1.4mm≤d2≤1.6mm, the second adhesive hole can accommodate more adhesive, thereby making the third side panel bonded more firmly.

[0019] In one embodiment, the distance between two adjacent first adhesive holes and the distance between two adjacent second adhesive holes are both L, where 1mm≤L≤2mm.

[0020] In one embodiment, the density of the first adhesive pores in the first adhesive application area is S1, and the density of the second adhesive pores in the second adhesive application area is S2, where S1 is less than S2.

[0021] Compared with the prior art, the cigarette box and the cigarette box adhesive device have recessed wavy textures set at intervals on the first and second side plates, and the wavy textures occupy at least 40% of the surface area of ​​the first and second side plates. The spaced wavy textures can accommodate adhesive when the third side plate is bonded to the first side plate and when the fourth side plate is bonded to the second side plate, which can enhance the uniformity of adhesive adhesion. In addition, the wavy textures occupying at least 40% of the surface area of ​​the first and second side plates can increase the adhesive adhesion area. Therefore, by enhancing the uniformity of adhesive adhesion and increasing the adhesive adhesion area, the rate of cigarette box bursting can be effectively reduced. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of the cigarette box in its unfolded state as provided in this application.

[0024] Figure 2 This is a structural schematic diagram of the adhesive applicator for cigarette boxes provided in this application.

[0025] Figure 3 This is a structural schematic diagram of the adhesive applicator for cigarette boxes provided in this application from another perspective.

[0026] The component labels are as follows:

[0027] 100. Cigarette box; 10. First panel; 11. First side panel; 12. Second side panel; 13. Wavy texture; 20. Second panel; 21. Third side panel; 30. Third panel; 31. Fourth side panel;

[0028] 200. Glue applicator for cigarette box; 210. Rotating shaft; 220. Glue applicator roller; 221. Blank area; 222. First glue applicator area; 2221. First glue applicator hole; 223. Second glue applicator area; 2231. Second glue applicator hole. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0034] Please see Figures 1 to 3 This application provides a cigarette case 100, mainly used for packaging cigarettes, especially slim cigarettes. The cigarette case 100 includes a first plate 10, a second plate 20, and a third plate 30. Along the length of the first plate 10, the second plate 20 and the third plate 30 are connected to both ends of the first plate 10 and are foldable relative to the first plate 10. Along the width of the first plate 10, a first side plate 11 and a second side plate 12 are respectively provided on both sides of the first plate 10. Along the length of the first plate 10, the first side plate 11 is located close to the second plate 20, and the second side plate 12 is located close to the third plate 30. A third side plate 21 is provided on both sides of the second plate 20, and a fourth side plate 31 is provided on both sides of the third plate 30. Both the first side plate 11 and the second side plate 12 are foldable relative to the first plate 10. The third side panel 21 can be folded relative to the second panel 20, and the fourth side panel 31 can be folded relative to the third panel 30. The surfaces of the first side panel 11 and the second side panel 12 are provided with a plurality of recessed wave textures 13 that are arranged at intervals along the length direction of the first panel 10. The surfaces of the third side panel 21 and the fourth side panel 31 are coated with adhesive. When the second panel 20 is folded relative to the first panel 10 and the third panel 30 is folded relative to the first panel 10, the third side panel 21 is bonded to the first side panel 11 by adhesive, and the fourth side panel 31 is bonded to the second side panel 12 by adhesive. The wave textures 13 occupy at least 40% of the surface area of ​​the first side panel 11 and the second side panel 12.

[0035] In existing technologies, according to production data statistics, under high-speed production conditions of ≥300 packs / minute, the bursting rate of cigarette boxes is as high as 1.2‰, which is 300% higher than the 0.3‰ of conventional cigarette products. The reasons for such a high bursting rate are as follows: 1. Insufficient effective contact area between the adhesive and the cigarette box; 2. Uneven adhesive layer thickness. This application addresses this by providing recessed wavy textures 13 at intervals on the first side plate 11 and the second side plate 12, ensuring that the wavy textures 13 occupy at least 40% of the surface area of ​​the first side plate 11 and the second side plate 12. These intervally arranged wavy textures 13 accommodate the adhesive during the bonding of the third side plate 21 to the first side plate 11 and the fourth side plate 31 to the second side plate 12, thereby enhancing the uniformity of adhesive adhesion. Furthermore, by ensuring that the wavy textures 13 occupy at least 40% of the surface area of ​​the first side plate 11 and the second side plate 12, the adhesive adhesion area is increased. Therefore, by enhancing the uniformity of adhesive adhesion and increasing the adhesive adhesion area, the bursting rate of the cigarette box 100 can be reduced.

[0036] It should be explained that the reason why the wavy texture 13 can enhance the uniformity of adhesive adhesion is that it creates tiny "adhesive storage spaces" in the areas where adhesive needs to be applied. When the adhesive is applied, these recessed areas can hold the adhesive and fix it in place, preventing the adhesive from flowing excessively or accumulating due to a smooth surface. This allows the adhesive to be distributed more evenly across the texture, rather than relying solely on the free spread of the adhesive, thus enhancing the uniformity of adhesive adhesion.

[0037] Actual testing showed that the adhesive area in the traditional adhesive structure accounted for 31.4% of the total area, while the adhesive area after optimization to a wavy texture accounted for more than 42.6% of the total area, an increase of 35.7%. This effectively increased the adhesive adhesion area and reduced the rate of cigarette box 100 bursting.

[0038] like Figure 1 As shown, the spacing between two adjacent recessed wavy textures 13 is d1, and 1.5mm≤d1≤2.5mm. For example, d1 can be selected as 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, etc. By setting 1.5mm≤d1≤2.5mm, the adhesive is contained within each wavy texture and then applied between the third side plate 21 and the first side plate 11, and between the fourth side plate 31 and the second side plate 12, so that the amount of adhesive contained in the same area on the third side plate 21 and the first side plate 11, and the fourth side plate 31 and the second side plate 12 is the same, thereby achieving good adhesion.

[0039] In one embodiment, the depth of each recessed wavy texture 13 is h, where 0.2 mm ≤ h ≤ 0.5 mm. It is understood that a greater depth of the wavy texture 13 allows for more adhesive to be accommodated, but excessive depth can result in an overly thick adhesive layer, which is also detrimental to the bonding of the cigarette box. Here, values ​​such as h = 0.2 mm, 0.4 mm, and 0.5 mm can be selected.

[0040] In one embodiment, the tilt angle of each wave texture 13 relative to the length direction of the first plate 10 is A, where 40° ≤ A ≤ 50°. For example, A can be selected as 40°, 45°, 50°, etc.

[0041] It needs to be explained that, as verified by the Six Sigma method, the shell-bursting problem is essentially a mismatch between the bonding energy of the "adhesive-substrate" interface and the high-speed dynamic adhesive application process: τ 实际 =0.25N / m<τ 需求 =0.35N / m (GB / T2791 standard). Peel strength tests conducted according to GB / T2791 standard showed that when d1=2.5mm, h=0.5mm, and A=45° were selected, the improved wavy texture 13 increased the peel strength of the bonded cigarette box paper from the original 0.25N / m to 0.32N / m, an increase of 28%, proving that the improved wavy texture 13 can effectively reduce the bursting rate of cigarette box 100.

[0042] In one embodiment, the cigarette box 100 is made of trademark paper with a coefficient of friction of μ, where 0.16 ≤ μ ≤ 0.17. For example, μ can be selected as 0.16, 0.165, 0.17, etc.

[0043] As shown in Table 1, the experiment shows that when μ=0.15, the peel strength of the bonded trademark paper is relatively low (τ). 实际 =0.28 N / m), making it difficult for the adhesive to distribute evenly, resulting in a high rate of shell bursting. When μ=0.16, the peel strength of the bonded cigarette box paper reaches its maximum (τ). 实际 =0.32N / m), and the shell bursting rate can be reduced to 0.05‰, exhibiting optimal adhesive adhesion performance. When μ=0.17, the peel strength of the bonded cigarette box paper actually decreases (τ). 实际 =0.30N / m), which may be due to uneven distribution of the adhesive under high friction, resulting in insufficient local bonding.

[0044] In this embodiment, the use of trademark paper with μ=0.16 ensures uniform distribution of the adhesive, optimizes adhesion performance, reduces the rate of shell bursting, and verifies the rationality of the proposed solution.

[0045] surface The effect of friction coefficient on adhesive adhesion

[0046]

[0047] like Figure 3 As shown, this application also provides the following technical solution: a cigarette box gluing device 200, which is used to perform gluing operations on the cigarette box 100 in the above embodiment; wherein, the cigarette box gluing device 200 includes a rotating shaft 210 and at least two gluing rollers 220, the at least two gluing rollers 220 being spaced apart on the rotating shaft 210; each gluing roller 220 has a blank area 221, a first gluing area 222 and a second gluing area 223 on its outer peripheral surface, the first gluing area 222 being adapted to the third side plate 21 and used to apply glue to the surface of the third side plate 21, and the second gluing area 223 being adapted to the fourth side plate 31 and used to apply glue to the surface of the fourth side plate 31.

[0048] In one embodiment, the adhesive roller 220 has a plurality of first adhesive holes 2221 in the first adhesive application area 222 and a plurality of second adhesive holes 2231 in the second adhesive application area 223. Both the first adhesive holes 2221 and the second adhesive holes 2231 are used to contain adhesive.

[0049] Preferably, the diameter of the first adhesive application hole 2221 is 1.2 mm.

[0050] In one embodiment, the diameter of the second adhesive application hole 2231 is d2, which is 1.4mm ≤ d2 ≤ 1.6mm. In this way, by setting the diameter of the second adhesive application hole 2231 to 1.4mm ≤ d2 ≤ 1.6mm, the second adhesive application hole 2231 can accommodate more adhesive, thereby making the third side plate 21 more firmly bonded.

[0051] As shown in Table 2, the experiment demonstrates that as the pore size increases from 1.2 mm to 1.5 mm and the amount of adhesive applied per pass increases from 35-40 μg to 40-50 μg, the uniformity of adhesive application by the adhesive roller 220 improves, leading to a gradual increase in the peel strength of the bonded cigarette box paper and a significant reduction in the bursting rate of cigarette box 100. When the pore size increases to 1.6 mm, the peel strength of the bonded cigarette box paper increases, but the effect tends to saturate, and excessive adhesive affects the drying speed, potentially leading to a decrease in bonding quality. The bursting rate decreased from 1.2‰ to 0.05‰, indicating that increasing the pore size helps reduce bursting, but it should be controlled within a reasonable range.

[0052] In this embodiment, d2=1.5mm, which ensures an appropriate amount of adhesive while optimizing peel strength, improving adhesion performance, and reducing the risk of shell bursting.

[0053] surface The effect of pore size on the amount of adhesive applied per application and the bonding effect

[0054]

[0055] In one embodiment, the distance between two adjacent first adhesive holes 2221 and the distance between two adjacent second adhesive holes 2231 are both L, where 1mm ≤ L ≤ 2mm. Here, L can be selected as 1mm, 1.5mm, 2mm, etc.

[0056] In one embodiment, the density of the first adhesive application holes 2221 in the first adhesive application area 222 is S1, and the density of the second adhesive application holes 2231 in the second adhesive application area 223 is S2, where S1 is less than S2. Since the second adhesive application area 223 is used to apply adhesive to the fourth side plate 31, and the fourth side plate 31 and the second side plate 12 are bonded together with adhesive, and given the small size of the fourth side plate 31 and the second side plate 12, more adhesive is needed to ensure the bonding strength between the fourth side plate 31 and the second side plate 12. By setting S1 to be less than S2, the first adhesive application area 222 can accommodate more adhesive, thereby applying more adhesive to the fourth side plate 31 and making the bond between the fourth side plate 31 and the second side plate 12 more secure.

[0057] To comprehensively evaluate the stability of the technical solution, this application also underwent rigorous accelerated aging tests. The cigarette box 100, produced using the new process, was placed in an environment with 80% RH and 40℃ for 48 hours before testing. The test results showed that after enduring the harsh environment, the bursting rate of the cigarette box 100 remained at an excellent level of 0.08‰, far lower than the 1.5‰ of the control group; the peel strength retention rate reached 93.3%, with a test value of 0.28 N / m, fully meeting the quality requirements of the product during warehousing and transportation.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A cigarette case, comprising a first plate (10), a second plate (20), and a third plate (30), wherein the second plate (20) and the third plate (30) are connected to both ends of the first plate (10) along the length direction of the first plate (10) and are respectively foldable relative to the first plate (10); in the width direction of the first plate (10), a first side plate (11) and a second side plate (12) are respectively provided on both sides of the first plate (10), wherein the first side plate (11) is foldable relative to the first plate (10) along the length direction of the first plate (10) and the second side plate (12) is foldable relative to the first plate (10) and the third plate (30 ... 11) The second side plate (12) is located near the second plate (20) and the third side plate (30) is located near the third plate (30); the second plate (20) is provided with a third side plate (21) on both sides and the third plate (30) is provided with a fourth side plate (31) on both sides; the first side plate (11) and the second side plate (12) can be folded relative to the first plate (10), the third side plate (21) can be folded relative to the second plate (20), and the fourth side plate (31) can be folded relative to the third plate (30); Its features are, The surfaces of the first side plate (11) and the second side plate (12) are provided with a plurality of recessed wave textures (13) arranged at intervals along the length direction of the first plate (10) at an angle. The surfaces of the third side plate (21) and the fourth side plate (31) are coated with adhesive. When the second plate (20) is folded relative to the first plate (10) and the third plate (30) is folded relative to the first plate (10), the third side plate (21) is bonded to the first side plate (11) by the adhesive, and the fourth side plate (31) is bonded to the second side plate (12) by the adhesive. The wave texture (13) occupies at least 40% of the surface area of ​​the first side plate (11) and the second side plate (12).

2. The cigarette case according to claim 1, characterized in that, The spacing between two adjacent wavy textures (13) is d1, and 1.5mm≤d1≤2.5mm.

3. The cigarette box according to claim 1 or 2, characterized in that, The depth of the wave texture (13) of each depression is h, 0.2mm≤h≤0.5mm.

4. The cigarette case according to claim 1, characterized in that, The tilt angle of each wave texture (13) relative to the length direction of the first plate (10) is A, 40°≤A≤50°.

5. The cigarette box according to claim 1 or 2, characterized in that, The cigarette box (100) is made of trademark paper with a coefficient of friction of μ, 0.16≤μ≤0.

17.

6. A device for applying adhesive to cigarette boxes, characterized in that, The cigarette box gluing device (200) is used to perform gluing operations on the cigarette box (100) according to any one of claims 1-5; The cigarette box gluing device (200) includes a rotating shaft (210) and at least two gluing rollers (220). The at least two gluing rollers (220) are spaced apart on the rotating shaft (210). Each gluing roller (220) has a blank area (221), a first gluing area (222), and a second gluing area (223) on its outer peripheral surface. The first gluing area (222) is adapted to the third side plate (21) and is used to apply glue to the surface of the third side plate (21). The second gluing area (223) is adapted to the fourth side plate (31) and is used to apply glue to the surface of the fourth side plate (31).

7. The adhesive applicator for cigarette boxes according to claim 6, characterized in that, The adhesive roller (220) has a plurality of first adhesive holes (2221) in the first adhesive area (222) and a plurality of second adhesive holes (2231) in the second adhesive area (223). Both the first adhesive holes (2221) and the second adhesive holes (2231) are used to contain adhesive.

8. The adhesive applicator for cigarette boxes according to claim 7, characterized in that, The diameter of the second adhesive application hole (2231) is d2, 1.4mm≤d2≤1.6mm.

9. The adhesive applicator for cigarette boxes according to claim 7, characterized in that, The distance between two adjacent first glue application holes (2221) and the distance between two adjacent second glue application holes (2231) are both L, 1mm≤L≤2mm.

10. The adhesive applicator for cigarette boxes according to claim 7, characterized in that, The density of the first adhesive pore (2221) in the first adhesive region (222) is S1, and the density of the second adhesive pore (2231) in the second adhesive region (223) is S2, where S1 is less than S2.

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