An automatic re-laminating machine for packaging boxes

Abstract

The utility model discloses an automatic laminating machine of packing box relates to laminating machine technical field, including first casing, horizontal installation is used for conveying plastic film's conveying belt in first casing, rotatable gluing roller is installed in first casing inside, the axial direction of gluing roller is perpendicular with the transmission direction of conveying belt, glue box is installed in first casing inside, and the lower part of gluing roller is dipped in glue box and is used for dipping glue solution, be equipped with compression roller above gluing roller, and gluing roller is used for pressing plastic film to gluing roller surface, and compression roller is installed in first casing inside through the lift adjusting mechanism, and the lift adjusting mechanism is used for adjusting the height of compression roller, realizes the adjustment of compression roller height through the linkage of third connecting rod and fourth connecting rod and second air cylinder, ensures that the clearance pressure of compression roller and gluing roller is adjustable, and the evenness of glue coverage is optimized.

Description

Technical Field

[0001] This utility model relates to the field of laminating machine technology, specifically to an automatic laminating machine for packaging boxes. Background Technology

[0002] A laminating machine is a device that coats a plastic film with adhesive and then applies it to printed materials on paper substrates. Applying adhesive to the plastic film is one of the production processes of a laminating machine. After lamination, the packaging box has a thin, transparent plastic film on its surface, making it smoother and shinier. This not only improves the gloss and durability of the printed materials and extends their service life, but also provides protection such as waterproofing, stain resistance, wear resistance, folding resistance, and chemical corrosion resistance.

[0003] Existing laminating machines cannot fully utilize the glue in the glue box when applying glue to plastic films, increasing the number of times glue needs to be added manually. This results in high labor intensity and inconvenience. Furthermore, the fixed distance between the glue roller and the pressure roller cannot be adjusted for plastic films of different thicknesses, limiting its applicability. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an automatic laminating machine for packaging boxes. Through the linkage of the X-type connecting rod group and the second cylinder, the height of the pressure roller can be adjusted, ensuring that the pressure gap between the pressure roller and the glue roller is adjustable. The distance between the pressure roller and the glue roller can be adjusted for plastic films of different thicknesses.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An automatic laminating machine for packaging boxes includes a first housing, in which a conveyor belt for conveying plastic film is horizontally mounted. Inside the first housing is a rotatable gluing roller, the axis of which is perpendicular to the conveying direction of the conveyor belt. Inside the first housing is a glue box, and the lower part of the gluing roller is immersed in the glue box to pick up glue. Above the gluing roller is a pressure roller, which presses the plastic film onto its surface. The pressure roller is mounted inside the first housing via a lifting and adjusting mechanism for adjusting its height.

[0007] Furthermore, a lifting assembly for adjusting the distance between the glue box and the glue roller is installed inside the first housing. The lifting assembly includes a first guide rod, a lower base plate, a first cylinder, an upper base plate, a crossbar, a first connecting rod, and a second connecting rod.

[0008] The lower base plate is fixedly connected inside the first housing. The bottom of the first guide rod is fixedly connected to the lower base plate. The upper base plate is slidably connected to the first guide rod. The common end of the second connecting rod and the first connecting rod is hinged to the crossbar. The other end of the first connecting rod is hinged to the lower base plate. The other end of the second connecting rod is hinged to the upper base plate. One end of the first cylinder is hinged to the lower base plate. The other end of the first cylinder is connected to the crossbar.

[0009] Furthermore, the lifting and adjusting mechanism includes a second housing, a first C-shaped bracket, a third connecting rod, a fourth connecting rod, and a second cylinder; the second housing is fixedly connected to the top of the first housing; the first C-shaped bracket is vertically slidably connected inside the second housing, and the pressure roller is rotatably connected to the bottom of the first C-shaped bracket; the third and fourth connecting rods are arranged in an X-shape, and the two connecting rods form an adjustable hinged fit at the intersection point; the bottom end of the third connecting rod is connected to the first C-shaped bracket through a hinge seat, the bottom end of the fourth connecting rod is connected to the first C-shaped bracket through a first sliding pair, the top end of the third connecting rod is connected to the second housing through a second sliding pair, and the top end of the fourth connecting rod is connected to the second housing through a hinge seat; the second cylinder is horizontally installed on the inner wall of the second housing, and its piston rod is fixedly connected to the end of the fourth connecting rod. By pushing the end of the fourth connecting rod to move horizontally, the X-shaped connecting rod assembly is driven to open and close, thereby realizing the lifting and adjusting of the C-shaped bracket.

[0010] Furthermore, vertical movable grooves are symmetrically opened on the left and right side walls of the second housing, and the two first connecting rods pass through the corresponding vertical movable grooves and are fixedly connected to the two ends of the pressure roller; at the same time, the two first connecting rods are rotatably connected to the first C-shaped bracket, so that the pressure roller rises and falls synchronously with the C-shaped bracket.

[0011] Furthermore, both the first sliding pair and the second sliding pair include a slider and a horizontal guide rod. The slider is slidably connected to the horizontal guide rod. The horizontal guide rod in the second sliding pair is connected to the second housing through a fixed seat. The horizontal guide rod in the first sliding pair is connected to the first C-shaped bracket through a fixed seat.

[0012] Furthermore, the glue box is equipped with a scraper for controlling the amount of glue applied by the glue roller.

[0013] The beneficial effects of this utility model are:

[0014] 1. In this application, the height of the pressure roller is adjusted by the linkage between the X-type linkage group and the second cylinder, ensuring that the pressure gap between the pressure roller and the glue roller is adjustable, optimizing the uniformity of glue coverage. The distance between the pressure roller and the glue roller can be adjusted for plastic films of different thicknesses. At the same time, the first cylinder drives the linkage mechanism to move the glue box up and down, compensating for the drop in liquid level caused by glue consumption in real time, ensuring that the glue roller is continuously immersed and ensuring a stable glue application. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the lifting and adjusting component structure of this utility model;

[0017] In the diagram, 1. First housing; 2. Conveyor belt; 3. Glue box; 4. Glue roller; 5. Lifting and adjusting mechanism; 51. Second housing; 511. Vertical movable groove; 52. First C-shaped bracket; 53. First connecting rod; 54. Third connecting rod; 55. Fourth connecting rod; 56. Second cylinder; 57. Slider; 58. Horizontal guide rod; 6. Pressure roller; 7. Lifting assembly; 71. First guide rod; 72. Lower base plate; 73. First cylinder; 74. Upper base plate; 75. Crossbar; 76. First connecting rod; 77. Second connecting rod; 8. Glue scraper. Detailed Implementation

[0018] Example 1

[0019] like Figures 1 to 2 As shown, an automatic laminating machine for packaging boxes includes a first housing 1. A conveyor belt 2 for conveying plastic film is horizontally installed in the first housing 1. The conveyor belt 2 can be a Teflon mesh conveyor belt, which has strong anti-sticking properties and is suitable for sticky films. A rotatable gluing roller 4 is installed inside the first housing 1. The axis of the gluing roller 4 is perpendicular to the conveying direction of the conveyor belt 2. A glue box 3 is installed inside the first housing 1. The lower part of the gluing roller 4 is immersed in the glue box 3 to pick up glue. When the equipment is operating normally, the lower part of the gluing roller 4 is immersed in the glue box 3 during rotation and prints the picked-up glue onto the surface of the plastic film. In order for the glue to cover the surface of the plastic film well, a pressure roller 6 is provided above the gluing roller 4. The pressure roller 6 is installed inside the first housing 1 through a lifting adjustment mechanism 5. The pressure roller 6 is used to press the plastic film onto the surface of the gluing roller 4, thereby adjusting to achieve complete coverage of the gluing area.

[0020] Among them, there are many existing lifting adjustment mechanisms 5. Existing screw lifting modules can be used, or the lifting adjustment mechanism 5 designed in this embodiment can be used. The purpose of designing the lifting adjustment mechanism 5 is to adjust the height of the pressure roller 6, so that the gap between the pressure roller 6 and the glue roller 4 can be changed, so as to control the pressure at the glue gap.

[0021] like Figure 2As shown, the designed lifting and adjusting mechanism 5 includes a second housing 51, a first U-shaped bracket 52, a third connecting rod 54, a fourth connecting rod 55, and a second cylinder 56. The second housing 51 is fixedly connected to the top of the first housing 1. The first U-shaped bracket 52 is vertically slidably connected inside the second housing 51, and the pressure roller 6 is at the bottom of the first U-shaped bracket 52. The third connecting rod 54 and the fourth connecting rod 55 are arranged in an X-shape, and the two connecting rods form an adjustable hinged fit at the intersection point. The bottom end of the third connecting rod 54 is connected to the first U-shaped bracket 52 through a hinge seat, and the bottom end of the fourth connecting rod 55 is connected to the first U-shaped bracket 56 through a first sliding pair. On the C-shaped bracket 52, the top end of the third connecting rod 54 is connected to the second housing 51 via a second sliding pair, and the top end of the fourth connecting rod 55 is connected to the second housing 51 via a hinge seat; the second cylinder 56 is horizontally mounted on the inner wall of the second housing 51, and its piston rod is fixedly connected to the end of the fourth connecting rod 55. By pushing the end of the fourth connecting rod 55 to move horizontally, the X-shaped connecting rod assembly is driven to open and close, thereby realizing the lifting and lowering adjustment of the first C-shaped bracket 52; at the same time, both the first and second sliding pairs include a slider 57 and a horizontal guide rod 58. The slider 57 is slidably connected to the horizontal guide rod 58, and the second sliding pair... The horizontal guide rod 58 is connected to the second housing 51 via a fixed seat. The horizontal guide rod 58 in the first sliding pair is connected to the first C-shaped bracket 52 via a fixed seat. When descent is required, the second cylinder 56 is activated, causing the slider 57 connected to the end of the fourth connecting rod 55 to move to the left on the horizontal guide rod 58. The distance between the two top ends of the X-shaped third connecting rod 54 and the fourth connecting rod 55 gradually decreases, pushing the first C-shaped bracket 52 downwards along the inner wall of the second housing 51. This, in turn, pushes the pressure roller 6 connected to the bottom end of the first C-shaped bracket 52 to move in the opposite direction, pressing... As roller 6 moves closer to the upper surface of roller 4, in order to ensure that roller 6 can only move up and down and avoid deviation, vertical movable grooves 511 are symmetrically opened on the left and right side walls of the second housing 51. The two first connecting rods 53 pass through the corresponding vertical movable grooves 511 and are fixedly connected to the two ends of roller 6. The two first connecting rods 53 are rotatably connected to the first C-shaped bracket 52, so that roller 6 can rotate while moving up and down synchronously with the C-shaped bracket. This allows the plastic film passing through the gap to cover the glue, and roller 6 can also reduce frictional resistance by rolling.

[0022] like Figure 1As shown, in actual use, as glue is continuously applied to the surface of the plastic film by rolling, the glue level in the glue box 3 gradually decreases as the glue roller 4 continuously applies glue. The glue level cannot fully submerge the lower part of the glue roller 4. Therefore, as the level decreases, a lifting assembly 7 is designed to raise the glue box 3. This lifting assembly 7 includes a first guide rod 71, a lower base plate 72, a first cylinder 73, an upper base plate 74, a crossbar 75, a first connecting rod 76, and a second connecting rod 77. The lower base plate 72 is fixedly connected to the upper base plate 74. Inside the first housing 1, the bottom of the first guide rod is fixedly connected to the lower base plate 72, and the upper base plate 74 is slidably connected to the first guide rod 71. The common end of the second connecting rod 77 and the first connecting rod 76 is hinged to the crossbar 75, the other end of the first connecting rod 76 is hinged to the lower base plate 72, and the other end of the second connecting rod 77 is hinged to the upper base plate 74. One end of the first cylinder 73 is hinged to the lower base plate 72, and the other end of the first cylinder 73 is connected to the crossbar 75. Subsequently, due to the constraint of the first guide rod 71, the upper base plate 74 can only move up and down. When the first cylinder 73 is supported by the lower base plate 72, its piston rod pushes the crossbar 75 to the right, causing the angle between the first connecting rod 76 and the second connecting rod 77 to gradually approach 180°, thus pushing the upper base plate 74 upward. The glue box 3 on the upper base plate 74 gradually moves closer to the upper glue roller 4. Conversely, when the first cylinder 73 is supported by the lower base plate 72, its piston rod pushes the crossbar 75 to the left, causing the angle between the first connecting rod 76 and the second connecting rod 77 to gradually decrease (the difference from 180° increases), from... As the upper base plate 74 is pushed down, the glue box 3 located on the upper base plate 74 gradually moves away from the upper glue roller 4, making it easier to inject glue solution into the glue box 3. If the glue is submerged in the lower part of the glue roller, there is a problem of excessive glue absorption. Therefore, a scraper 8 is fixedly connected to the inner wall of the glue box 3. The scraper 8 scrapes away the glue on the upper glue roller 4, thereby ensuring that the amount of glue applied to the upper glue roller 4 is controlled. When the upper glue roller 4 rotates counterclockwise, the scraper 8 scrapes away the glue on the upper glue roller 4, and the scraped glue falls into the glue box 3.

[0023] In summary, implementing this solution solved problems related to adhesive uniformity, liquid level stability, and ease of operation during the lamination process, significantly improving the lamination quality of packaging boxes and the level of equipment automation. Specific results are analyzed below:

[0024] First, precise pressure control: Through the linkage of the X-type linkage group (third linkage 54, fourth linkage 55) and the second cylinder 56, the height of the pressure roller 6 can be adjusted, ensuring that the pressure gap between the pressure roller 6 and the glue roller 4 is adjustable and optimizing the uniformity of glue coverage.

[0025] Second, strong stability: The first C-shaped bracket 52 is connected to the second housing 51 through a vertical sliding connection. Combined with the guiding effect of the vertical movable grooves 511 on both sides and the first connecting rod 53, it avoids the pressure roller 6 from running off-center and ensures the stability of vertical lifting.

[0026] Third, low-friction transmission: the rolling motion during the pressing of plastic films reduces friction and extends the life of components.

[0027] Fourth, the second cylinder 56 horizontally pushes the slider 57, and the horizontal movement is converted into vertical lifting and lowering through the X-shaped connecting rod, resulting in a compact structure.

[0028] Fifth, dynamic liquid level compensation: The first cylinder 73 drives the linkage mechanism to move the glue box 3 up and down, which compensates for the drop in liquid level caused by glue consumption in real time, ensuring that the glue roller 4 is continuously immersed and ensuring a stable glue application amount.

[0029] Sixth, the extension and retraction of the first cylinder 73 can control the lifting and lowering of the glue box 3 in both directions, which can meet the lifting needs during production and facilitate the lowering of the glue box 3 for glue replenishment or cleaning when the machine is stopped.

[0030] Seventh, the glue box 3 integrates a scraper 8 to scrape off excess glue, preventing the glue roller 4 from carrying too much glue and improving the consistency of the glue film thickness.

Claims

1. An automatic laminating machine for packaging boxes, characterized in that, The device includes a first housing (1), in which a conveyor belt (2) for conveying plastic film is horizontally installed. A rotatable glue roller (4) is installed inside the first housing (1), with the axis of the glue roller (4) perpendicular to the conveying direction of the conveyor belt (2). A glue box (3) is installed inside the first housing (1), and the lower part of the glue roller (4) is immersed in the glue box (3) to pick up glue. A pressure roller (6) is provided above the glue roller (4), which is used to press the plastic film onto the surface of the glue roller (4). The pressure roller (6) is installed inside the first housing (1) through a lifting adjustment mechanism (5), which is used to adjust the height of the pressure roller (6).

2. The automatic laminating machine for packaging boxes according to claim 1, characterized in that, The first housing (1) is equipped with a lifting assembly (7) for adjusting the distance between the glue box (3) and the glue roller (4). The lifting assembly (7) includes a first guide rod (71), a lower base plate (72), a first cylinder (73), an upper base plate (74), a crossbar (75), a first connecting rod (76), and a second connecting rod (77). The lower base plate (72) is fixedly connected inside the first housing (1). The bottom of the first guide rod is fixedly connected to the lower base plate (72). The upper base plate (74) is slidably connected to the first guide rod (71). The common end of the second connecting rod (77) and the first connecting rod (76) is hinged to the crossbar (75). The other end of the first connecting rod (76) is hinged to the lower base plate (72). The other end of the second connecting rod (77) is hinged to the upper base plate (74). One end of the first cylinder (73) is hinged to the lower base plate (72). The other end of the first cylinder (73) is connected to the crossbar (75).

3. The automatic laminating machine for packaging boxes according to claim 1, characterized in that, The lifting and adjusting mechanism (5) includes a second housing (51), a first I-shaped bracket (52), a third connecting rod (54), a fourth connecting rod (55), and a second cylinder (56); The second housing (51) is fixedly connected to the top of the first housing (1); The first slanted bracket (52) is vertically slidably connected inside the second housing (51), and the pressure roller (6) is rotatably connected to the bottom of the first slanted bracket (52); The third link (54) and the fourth link (55) are arranged in an X shape, and the two links form an adjustable hinge at the intersection. The bottom end of the third link (54) is connected to the first C-shaped bracket (52) through a hinge seat. The bottom end of the fourth link (55) is connected to the first C-shaped bracket (52) through a first sliding pair. The top end of the third link (54) is connected to the second housing (51) through a second sliding pair. The top end of the fourth link (55) is connected to the second housing (51) through a hinge seat. The second cylinder (56) is horizontally installed on the inner wall of the second housing (51). Its piston rod is fixedly connected to the end of the fourth connecting rod (55). By pushing the end of the fourth connecting rod (55) to move horizontally, the X-shaped connecting rod assembly is driven to open and close, so as to realize the lifting and lowering adjustment of the C-shaped bracket.

4. An automatic laminating machine for packaging boxes according to claim 3, characterized in that, The second housing (51) has symmetrical vertical movable grooves (511) on its left and right side walls. The two first connecting rods (53) pass through the corresponding vertical movable grooves (511) and are fixedly connected to the two ends of the pressure roller (6). At the same time, the two first connecting rods (53) are rotatably connected to the first C-shaped bracket (52), so that the pressure roller (6) rises and falls synchronously with the C-shaped bracket.

5. An automatic laminating machine for packaging boxes according to claim 3, characterized in that, The first sliding pair and the second sliding pair both include a slider (57) and a horizontal guide rod (58). The slider (57) is slidably connected to the horizontal guide rod (58). The horizontal guide rod (58) in the second sliding pair is connected to the second housing (51) through a fixed seat. The horizontal guide rod (58) in the first sliding pair is connected to the first U-shaped bracket (52) through a fixed seat.

6. An automatic laminating machine for packaging boxes according to claim 2, characterized in that, The glue box (3) is equipped with a scraper (8) for controlling the amount of glue applied by the glue roller (4).

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