Food packaging bag compounding device and compounding method

Abstract

The present invention relates to the technical field of packaging bags, and specifically to a food packaging bag compounding device and a compounding method, comprising a first glue coating roller and a second glue coating roller, the first glue coating roller and the second glue coating roller are arranged up and down, the surfaces of the first glue coating roller and the second glue coating roller are provided with a plurality of glue dripping ports arranged in a circular array, each of the glue dripping ports is provided with a glue dripping control panel for opening and closing the glue dripping port, the same end of the first glue coating roller and the second glue coating roller are coaxially rotatably connected to a glue delivery pipe, and the ends of the two glue delivery pipes are simultaneously fixedly connected to a glue adding box, and the other ends of the first glue coating roller and the second glue coating roller are simultaneously rotatably connected to a connecting frame. The purpose of the present invention is to solve the problem that a door-shaped device can usually only perform single-layer compounding on one side, and for food packaging bags that need to be compounded on both sides, if single-sided compounding is used, the compounding efficiency is low.

Description

Technical Field

[0001] The invention relates to the technical field of packaging bags, in particular to a food packaging bag compounding device and a compounding method. Background Art

[0002] Plastic packaging bags are made of plastic as raw material and are used to produce various daily necessities. They are widely used in daily life and industrial production. Commonly used plastic packaging bags are mostly made of polyethylene film, which is non-toxic and can be used to hold food. Plastic packaging bags actually include multiple layers of plastic films such as inner film and printed film. When producing plastic packaging bags, multiple layers of film need to be compounded into one layer of film before being made into packaging bags. The compounding equipment is to bond two or more layers of materials together with adhesives. The existing compounding equipment has horizontal settings, with a long transmission line on the horizontal plane and a large equipment footprint. There are also gate-shaped settings, with a short transmission line on the horizontal plane and a small equipment footprint.

[0003] Publication No.: CN107599603B discloses a composite device for printing food packaging bags, including a composite device main body, a leveling roller group, a smooth composite table, a winding device, a composite film, a composite film roller, an electric heating tube, an anti-adhesive temperature-resistant resin layer, a hot melt adhesive roller, a glue-transmitting penetrating cotton, a hot glue storage chamber, a straightener, a unwinding device, a primary flattening roller, a connecting shell, an air pump, a through hole, a smooth limiting layer, and a limiting leveler. The right end of the composite device main body is provided with an unwinding device. Compared with the prior art, the beneficial effect of the present invention is that the new composite device for printing food packaging bags is scientifically and reasonably designed and can perform double-sided composite simultaneously. When the food packaging bags need to be double-sided composited, the efficiency can be greatly improved. Secondly, the food packaging bags to be composited are subjected to multiple leveling treatments to ensure that the wrinkle rate is low before composite, thereby improving the composite effect. Therefore, it is widely applicable to various occasions.

[0004] The above technical solution solves the problem that an existing composite equipment for printing food packaging bags can only perform single-layer composite on one side. For most food packaging bags, both sides must be composited. If single-sided composite is used, the composite efficiency is low. However, the above technical solution is for composite equipment with horizontal settings. The existing equipment for composite food packaging bags in the shape of a gate can usually only perform single-layer composite on one side. For food packaging bags that need to be composited on both sides, if single-sided composite is used, the composite efficiency is low. Summary of the invention

[0005] The purpose of the present invention is to provide a food packaging bag compounding device and a compounding method to solve the problem that the gate-shaped equipment can usually only perform single-layer compounding on one side, and for food packaging bags that need to be compounded on both sides, if single-sided compounding is used, the compounding efficiency is low.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A food packaging bag compounding device comprises a first glue coating roller and a second glue coating roller, the first glue coating roller and the second glue coating roller are arranged up and down, the surfaces of the first glue coating roller and the second glue coating roller are provided with a plurality of glue dripping ports arranged in a circular array, each of the glue dripping ports is provided with a glue dripping control panel for opening and closing the glue dripping port, the same end of the first glue coating roller and the second glue coating roller are coaxially rotatably connected to a glue delivery pipe, and the ends of the two glue delivery pipes are simultaneously fixedly connected to a glue adding box, the other ends of the first glue coating roller and the second glue coating roller are simultaneously rotatably connected to a connecting frame, the first glue coating roller, the second glue coating roller, the two glue delivery pipes, the glue adding box, and the connecting frame are connected to each other, the heights of the first glue coating roller, the second glue coating roller, the two glue delivery pipes, and the connecting frame are all lower than the glue adding box, and the first glue coating roller and the second glue coating roller rotate in opposite directions.

[0008] Preferably, a second motor is fixedly connected to the surface of the connecting frame, and the output end of the second motor is coaxially fixedly connected to one of the first glue coating roller and the second glue coating roller. The surfaces of the first glue coating roller and the second glue coating roller are both coaxially fixedly connected with spur gears, and the two spur gears are meshingly connected.

[0009] Preferably, the inner walls of the first glue coating roller and the second glue coating roller are fixedly provided with a spiral conveying plate, and the two spiral conveying plates are symmetrically arranged, the inner surface of each glue dripping control plate is fixedly connected with a return spring, and each return spring is fixedly connected to the spiral conveying plate.

[0010] Preferably, a first glue spreading component is arranged between the glue adding box and the connecting frame, and a second glue spreading component is arranged between one of the glue delivery pipes and the connecting frame.

[0011] Preferably, the first glue spreading assembly includes a first connecting plate, a first glue spreading plate and a second connecting plate, one end of the first glue spreading plate is fixedly connected to the first connecting plate, and the other end is fixedly connected to the second connecting plate, the first connecting plate is fixedly connected to the glue adding box, and the second connecting plate is fixedly connected to the connecting frame.

[0012] Preferably, the second glue spreading assembly includes a third connecting plate, a second glue spreading plate and a fourth connecting plate, one end of the second glue spreading plate is fixedly connected to the third connecting plate, and the other end is fixedly connected to the fourth connecting plate, the fourth connecting plate and one of the glue delivery pipes are fixedly connected, and the third connecting plate and the connecting frame are fixedly connected.

[0013] Preferably, the first glue spreading plate and the second glue spreading plate are both fixedly connected to the interior thereof with a partition plate, the interior thereof are both divided into a first cavity and a glue collecting groove by the partition plate, and the glue collecting groove has an upward opening, the surface of the partition plate is rotatably connected to a switch door, the surface of the partition plate is provided with an avoidance groove for the rotation of the switch door, the switch door is used to control the connection between the first cavity and the glue collecting groove, the bottom surfaces of the first glue spreading plate and the second glue spreading plate are both fixedly connected to a third motor, and the output end of the third motor is fixedly connected to the switch door.

[0014] Preferably, the first cavity in the first glue-spreading plate is interconnected with the first connecting plate and the second connecting plate, the first connecting plate and the glue adding box are interconnected, the second connecting plate and the connecting frame are interconnected, the first cavity in the second glue-spreading plate is interconnected with the third connecting plate and the fourth connecting plate, the third connecting plate and the connecting frame are interconnected, and the fourth connecting plate is interconnected with one of the glue delivery pipes.

[0015] A food packaging bag compounding method is carried out using the food packaging bag compounding device, and the specific steps are as follows:

[0016] A. Pour adhesive into the glue adding box until the adhesive fills the glue adding box. The base film first passes through the second glue coating roller and then the first glue coating roller in an S shape. When the base film passes through the first glue coating roller and the second glue coating roller, the glue dripping control board opens the glue dripping port, and the adhesive flows onto the base film, so that the upper and lower parts of the base film are coated with adhesive. Then, the upper part of the base film is rolled and laminated with one of the laminating films, and the lower part of the base film is rolled and laminated with the other laminating film, so that the upper and lower parts of the base film are laminated at the same time;

[0017] B. When the base film passes through the first glue coating roller and the second glue coating roller, it will pass through the first glue coating plate and the second glue coating plate. When one side of the base film passes through the second glue coating plate, the adhesive on that side of the base film will be evenly spread. When the other side of the base film passes through the first glue coating plate, the adhesive on that side of the base film will be evenly spread.

[0018] C. During the process of evenly spreading the adhesive on the first and second adhesive boards, excess adhesive will drip into the adhesive collecting tank for collection. When the adhesive collecting tank is full of adhesive, the third motor is started to drive the switch door to rotate into the avoidance tank, so that the adhesive collecting tank is connected to the inner cavity of the first adhesive board, so that the adhesive in the adhesive collecting tank flows downstream and merges with the adhesive in the first cavity.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting the first glue coating roller and the second glue coating roller, the base film of the packaging bag passes through the first glue coating roller and the second glue coating roller in an S shape, so that the upper and lower surfaces of the base film are in contact with the first glue coating roller and the second glue coating roller, and the adhesive inside the base film flows onto the base film, and double-sided gluing can be performed. Double-sided gluing facilitates double-sided lamination, which is beneficial to improve the lamination efficiency of food packaging bags that need double-sided lamination;

[0021] 2. The first glue coating roller, the second glue coating roller, the two glue delivery pipes, the glue adding box, and the connection frame are connected to each other, and the first glue coating roller and the second glue coating roller are connected to each other through two flat gears. Only one set of adhesive delivery mechanism and the second motor are needed to enable the first glue coating roller and the second glue coating roller to achieve the double-sided glue application function. There is no need to control the first glue coating roller and the second glue coating roller separately to apply glue, which is convenient to operate. By reducing the setting of motors, it is beneficial to reduce the cost of equipment purchase and maintenance, reduce the complexity of the control system, and reduce energy output;

[0022] 3. By setting up the glue collecting groove, when the first glue spreading device and the second glue spreading device spread the adhesive on the surface of the base film, the excess adhesive that falls down is caught, which is helpful to prevent the excess adhesive from falling directly onto the equipment after spreading, causing waste and pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the first glue coating roller of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure in which the glue spreading component and the glue delivery component of the present invention are connected to each other;

[0026] Figure 4 This is a schematic diagram of the cross-section structure of the first rubber sheet of the present invention;

[0027] Figure 5 For the present invention Figure 4 The enlarged view of point A in the middle;

[0028] Figure 6 This is a schematic diagram of the vertical section structure of the first rubber plate of the present invention;

[0029] Figure 7 It is a schematic structural diagram of a vertical section of the first glue coating roller and the second glue coating roller of the present invention;

[0030] Figure 8 For the present invention Figure 7 The enlarged view of point B in the middle;

[0031] Fig. 9 For the present invention Figure 7Enlarged view of point C in the middle;

[0032] Fig.10 This is a schematic diagram of the structure of the glue adding box in vertical section according to the present invention;

[0033] Fig.11 It is a schematic diagram of the structure of the vertical section of the connecting frame of the present invention;

[0034] Fig.12 It is a left side view of the internal structure of the first glue coating roller and the second glue coating roller of the present invention;

[0035] Fig.13 This is a double-sided composite state effect diagram of the present invention.

[0036] In the figure: 1. first glue coating roller; 2. second glue coating roller; 3. spiral conveying plate; 4. return spring; 5. glue dripping control plate; 6. flat gear; 7. L-shaped ring groove; 8. L-shaped ring block; 9. glue delivery hose; 10. glue adding box; 11. sealing plate; 12. first motor; 13. first connecting plate; 14. first glue spreading plate; 15. second connecting plate; 16. first connecting port; 17. connecting cavity; 18. connecting frame; 19. third connecting plate; 20. second glue spreading plate; 21. fourth connecting plate; 22. second connecting port; 23. second motor; 24. glue collecting tank; 25. partition plate; 26. switch door; 27. avoidance groove; 28. third motor; 29. ​​glue dripping port. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 13 , the present invention provides a technical solution.

[0039] A food packaging bag compounding device comprises a first glue coating roller 1 and a second glue coating roller 2, the first glue coating roller 1 and the second glue coating roller 2 are arranged up and down, the surfaces of the first glue coating roller 1 and the second glue coating roller 2 are provided with a plurality of glue dripping ports 29 arranged in a circular array, each glue dripping port 29 is provided with a glue dripping control panel 5 for switching the glue dripping port 29, the same end of the first glue coating roller 1 and the second glue coating roller 2 are coaxially rotatably connected to a glue delivery pipe 9, and the ends of the two glue delivery pipes 9 are simultaneously fixedly connected to a glue adding box 10, and the other ends of the first glue coating roller 1 and the second glue coating roller 2 are fixedly connected to a glue delivery pipe 9 ... The ends are simultaneously rotatably connected with a connecting frame 18, and the first glue coating roller 1, the second glue coating roller 2, the two glue delivery pipes 9, the glue adding box 10, and the connecting frame 18 are connected and arranged. The heights of the first glue coating roller 1, the second glue coating roller 2, the two glue delivery pipes 9, and the connecting frame 18 are all lower than the glue adding box 10. The first glue coating roller 1 and the second glue coating roller 2 rotate in opposite directions. When adhesive is poured into the glue adding box 10, the adhesive will flow between the first glue coating roller 1, the second glue coating roller 2, the two glue delivery pipes 9, the glue adding box 10, and the connecting frame 18. When the adhesive fills the glue adding box 10, according to two basic concepts in fluid statics: the communicating vessel principle and the balance of liquid pressure, it is explained that the first glue coating roller 1, the second glue coating roller 2, the two glue delivery pipes 9, and the connecting frame 18 are all filled with adhesive, which is conducive to preventing the adhesive in the first glue coating roller 1 and the second glue coating roller 2 from being unevenly distributed. The first glue coating roller 1 and the second glue coating roller 2 rotate in opposite directions, please refer to the first connecting plate 13 in the figure, so that the packaging bag base film is first inserted from the lower end of the second glue coating roller 2 in an S shape, then passes through between the first glue coating roller 1 and the second glue coating roller 2, and finally passes through the first glue coating roller 1. The upper end of the glue roller 1 passes through, so that the upper and lower surfaces of the base film are in contact with the first glue roller 1 and the second glue roller 2. Then, when the base film passes through the first glue roller 1 and the second glue roller 2, the glue dripping control board 5 opens the glue dripping port 29 to allow the internal adhesive to flow onto the base film, so that double-sided glue coating can be performed. Double-sided glue coating facilitates double-sided lamination. Please continue to refer to the first connecting plate 13 in Figure. Pressing rollers are set on the upper and lower surfaces of the base film part with adhesive applied on both sides, and then the two pressing rollers are matched with a feeding roller. The feeding roller discharges the composite film, and the composite film passes through the pressing roller and is compounded with the base film.

[0040] A second connecting port 22 is provided at one end of the first glue coating roller 1 and the second glue coating roller 2 connected to the connecting frame 18, and the second connecting port 22 is located inside the connecting frame 18. A connecting cavity 17 is provided inside the connecting frame 18, and the connecting cavity 17 and the second connecting port 22 are connected to each other. Through the second connecting port 22 and the connecting cavity 17, the first glue coating roller 1 and the second glue coating roller 2 are both rotatably connected to the connecting frame 18 and connected to each other.

[0041] A second motor 23 is fixedly connected to the surface of the connecting frame 18, and the output end of the second motor 23 is coaxially fixedly connected to one of the first glue coating roller 1 and the second glue coating roller 2. The surfaces of the first glue coating roller 1 and the second glue coating roller 2 are coaxially fixedly connected with a flat gear 6, and the two flat gears 6 are meshingly connected. By starting the second motor 23, one of the first glue coating roller 1 and the second glue coating roller 2 is driven to rotate, and then because the two flat gears 6 are meshingly connected, the other one also rotates, and because of the nature of the gears, the first glue coating roller 1 and the second glue coating roller 2 have opposite rotation directions, which is beneficial to simultaneously drive the first glue coating roller 1 and the second glue coating roller 2 to rotate by a second motor 23, and meets the requirement of opposite rotation directions. In actual use, the glue delivery pipe 9, the glue adding box 10, and the connecting frame 18 can all be installed on the shell of the gate-shaped composite equipment, which is not drawn in the accompanying drawings.

[0042] The inner walls of the first glue coating roller 1 and the second glue coating roller 2 are fixedly provided with a spiral conveying plate 3, and the two spiral conveying plates 3 are symmetrically arranged. By arranging the spiral conveying plates 3 in the first glue coating roller 1 and the second glue coating roller 2, during the rotation of the first glue coating roller 1 and the second glue coating roller 2, the spiral conveying plates 3 follow the rotation, which is conducive to stirring the adhesive and making the adhesive follow the rotation of the spiral conveying plates 3 and flow in a certain direction. In the present application, the adhesive is mainly made to flow along the glue conveying pipe 9 toward the connecting frame 18. Since the first glue coating roller 1 and the second glue coating roller 2 rotate in opposite directions, the adhesive in the first glue coating roller 1 and the second glue coating roller 2 must flow in the same direction, so the spiral conveying plates 3 in the first glue coating roller 1 and the second glue coating roller 2 are symmetrically arranged. The inner side surface of each glue dripping control plate 5 is fixedly connected to a reset spring 4, and each reset spring 4 is fixedly connected to the spiral conveying plate 3. By arranging the reset spring 4, the glue dripping control plate 5 automatically opens the glue dripping port 29 when it is under pressure, and automatically closes the glue dripping port 29 when the pressure is lost.

[0043] A sealing plate 11 is rotatably connected between the openings inside the glue adding box 10 and communicating with the two glue delivery pipes 9. A first motor 12 is fixedly installed on the surface of the glue adding box 10. The output end of the first motor 12 is fixedly connected to the sealing plate 11. By setting the sealing plate 11, the sealing plate 11 can be rotated to block one of the openings of the two glue delivery pipes 9, so that the adhesive can only enter from one of the openings of the glue delivery pipes 9, which is beneficial to the adhesive delivery during single-sided lamination.

[0044] One end of the two rubber delivery pipes 9 is coaxially fixedly connected with an L-shaped ring block 8, and one end of the first rubber coating roller 1 and the second rubber coating roller 2 are both provided with an L-shaped ring groove 7 for the L-shaped ring block 8 to rotate. The L-shaped ring block 8 rotates in the L-shaped ring groove 7, so that the two rubber delivery pipes 9 are rotationally connected to the first rubber coating roller 1 and the second rubber coating roller 2 respectively.

[0045] A first glue spreading component is arranged between the glue adding box 10 and the connecting frame 18, and a second glue spreading component is arranged between one of the glue delivery pipes 9 and the connecting frame 18. When the first glue spreading component is used to spread the adhesive on the upper surface of the base film, the second glue spreading component will spread the adhesive on the lower surface of the base film. Conversely, the first glue spreading component will spread the adhesive on the lower surface of the base film, and the second glue spreading component will spread the adhesive on the upper surface of the base film. This is determined according to the way the base film passes through the first glue coating roller 1 and the second glue coating roller 2.

[0046] The first glue-spreading assembly includes a first connecting plate 13, a first glue-spreading plate 14 and a second connecting plate 15. One end of the first glue-spreading plate 14 is fixedly connected to the first connecting plate 13, and the other end is fixedly connected to the second connecting plate 15. The first connecting plate 13 and the glue-adding box 10 are fixedly connected, and the second connecting plate 15 and the connecting frame 18 are fixedly connected. When the base film coated with adhesive passes through the first glue-spreading plate 14, the adhesive on the surface of the base film will be evenly spread on the surface of the first glue-spreading plate 14.

[0047] The second glue-spreading assembly includes a third connecting plate 19, a second glue-spreading plate 20 and a fourth connecting plate 21. One end of the second glue-spreading plate 20 is fixedly connected to the third connecting plate 19, and the other end is fixedly connected to the fourth connecting plate 21. The fourth connecting plate 21 is fixedly connected to one of the glue delivery pipes 9, and the third connecting plate 19 is fixedly connected to the connecting frame 18. When the base film coated with adhesive passes through the second glue-spreading plate 20, the adhesive on the surface of the base film will be evenly spread on the surface of the second glue-spreading plate 20.

[0048] The first glue-spreading plate 14 and the second glue-spreading plate 20 are both fixedly connected with a partition plate 25 inside, and the first glue-spreading plate 14 and the second glue-spreading plate 20 are both divided into a first cavity and a glue collecting groove 24 by the partition plate 25, and the glue collecting groove 24 has an upward opening, and the surface of the partition plate 25 is rotatably connected with a switch door 26, and the surface of the partition plate 25 is provided with an avoidance groove 27 for the rotation of the switch door 26, and the switch door 26 is used to control the connection between the first cavity and the glue collecting groove 24, and the bottom surfaces of the first glue-spreading plate 14 and the second glue-spreading plate 20 are both fixedly connected with a third motor 28, and the output end of the third motor 28 is fixedly connected to the switch door 26, and the glue collecting groove 24 is used to collect the adhesive dropped during the process of evenly spreading the adhesive on the surface of the base film. By setting the glue collecting groove 24 to collect the adhesive, it is helpful to avoid the waste caused by the drop of excess adhesive, and more seriously, the pollution of the device occurs.

[0049] The first cavity in the first glue-spreading plate 14 is interconnected with the first connecting plate 13 and the second connecting plate 15, the first connecting plate 13 and the glue-adding box 10 are interconnected, the second connecting plate 15 and the connecting frame 18 are interconnected, and a first connecting port 16 is provided on the surface of the connecting frame 18 at the connection point of the second connecting plate 15. The first connecting port 16 connects the second connecting plate 15 with the connecting cavity 17 inside the connecting frame 18, the first cavity in the second glue-spreading plate 20 is interconnected with the third connecting plate 19 and the fourth connecting plate 21, the third connecting plate 19 and the connecting frame 18 are interconnected, and the fourth connecting plate 21 is interconnected with one of the glue delivery pipes 9, and the first glue-spreading component and the second glue-spreading component are connected with the glue delivery pipe 9, the glue-adding box 10, and the connecting frame 18, so that the adhesive also enters the first glue-spreading component and the second glue-spreading component and flows.

[0050] When the switch door 26 is rotated into the avoidance groove 27, the first cavity is connected to the glue collecting groove 24, otherwise the first cavity and the glue collecting groove 24 are not connected. When a certain amount of adhesive is collected in the glue collecting groove 24, the switch door 26 can be rotated to make the first cavity connected to the glue collecting groove 24, so that the adhesive in the glue collecting groove 24 flows downstream into the first cavity and merges with the mainstream adhesive. The partition plate 25 and the switch door 26 can separate the glue collecting groove 24 into independent spaces, that is, when the switch door 26 is not in the avoidance groove 27, the first cavity and the glue collecting groove 24 are not connected, and the glue collecting groove 24 will not be connected with the first glue coating roller 1, the second glue coating roller 2, the two glue delivery pipes 9, the glue adding box 10, and the connecting frame 18, so as to prevent the flowing adhesive trunk from flowing into the glue collecting groove 24.

[0051] The bottom surface of the glue collecting groove 24 is tilted downward toward the glue adding box 10, so that the adhesive in the glue collecting groove 24 also tends to flow toward the glue adding box 10, so that when the glue collecting groove 24 is connected with the first cavity, the adhesive in the glue collecting groove 24 will flow into the first cavity. As needed, in order to further prevent the mainstream adhesive in the first cavity from flowing into the glue collecting groove 24 when the first cavity is connected with the glue collecting groove 24, the first glue spreading assembly and the second glue spreading assembly can be tilted downward as a whole toward the glue adding box 10, and the switch door 26 can also be opened in the downstream direction of the adhesive.

[0052] The specific solution is as follows: first pour adhesive into the glue adding box 10 until the adhesive fills the first glue coating roller 1, the second glue coating roller 2, the glue delivery tube 9, the glue adding box 10, the first connecting plate 13, the second connecting plate 15, the connecting frame 18, the third connecting plate 19, the fourth connecting plate 21, and the first glue applying plate 14, the second glue applying plate 20 The first cavity inside, then please refer to Fig.13, the base film is first passed through the second glue coating roller 2 in an S shape, and then passed through the first glue coating roller 1. Because it passes through the second glue coating roller 2 and the first glue coating roller 1 in an S shape, the upper part of the base film is coated with adhesive when passing through the second glue coating roller 2, and then when passing through the first glue coating roller 1, the adhesive is coated on the lower part of the base film, so that the upper and lower parts of the base film are coated with adhesive, and then the upper part of the base film is rolled and compounded with one of the laminating films, and the lower part of the base film is rolled and compounded with the other laminating film, so that the upper and lower parts of the base film are compounded at the same time, realizing double-sided compounding;

[0053] The specific method of applying adhesive to the base film is: by starting the second motor 23 to drive the first glue coating roller 1 to rotate, the rotation of the first glue coating roller 1 drives the flat gear 6 thereon to rotate, and the rotation of the flat gear 6 on the first glue coating roller 1 drives the flat gear 6 on the second glue coating roller 2 to rotate, so that the second glue coating roller 2 also rotates, and because of the principle of meshing rotation of the two flat gears 6, the first glue coating roller 1 and the second glue coating roller 2 rotate in opposite directions, just in the S-shaped conveying method of the composite base film, when the base film passes through the first glue coating roller 1 and the second glue coating roller When the glue-drip control plate 5 moves to the first glue-drip roller 1 or the second glue-drip roller 2, the glue-drip control plate 5 will be squeezed, so that the glue-drip control plate 5 moves toward the corresponding first glue-drip roller 1 or the second glue-drip roller 2. When the glue-drip control plate 5 moves to a certain extent, the glue-drip control plate 5 and the glue-drip opening 29 will not be attached to each other, so that the glue-drip opening 29 is opened, and the adhesive in the first glue-drip roller 1 or the second glue-drip roller 2 will flow from the glue-drip opening 29 to the surface of the base film. When the glue-drip control plate 5 is away from the base film, the glue-drip control plate 5 is reset under the elastic force of the reset spring 4, so that the glue-drip opening 29 can be closed to prevent the adhesive from flowing out.

[0054] When only one side of the base film needs to be laminated, the first motor 12 can be started to drive the sealing plate 11 to rotate, so that the sealing plate 11 covers the opening of the glue delivery pipe 9 connected to the first glue coating roller 1, so that the adhesive can only flow into the second glue coating roller 2, or the sealing plate 11 covers the opening of the glue delivery pipe 9 connected to the second glue coating roller 2, so that the adhesive can only flow into the first glue coating roller 1, so that the adhesive is only applied to the upper part or the lower part of the base film;

[0055] During the rotation of the first glue coating roller 1 and the second glue coating roller 2, the spiral conveying plate 3 inside the first glue coating roller 1 and the second glue coating roller 2 will also rotate. The rotation of the spiral conveying plate 3 is conducive to the adhesive in the first glue coating roller 1 and the second glue coating roller 2 having the power to move from the glue adding box 10 to the connecting frame 18, so that the adhesive inside the whole of the present invention is in a flowing state, which is conducive to preventing the adhesive from stagnation. The adhesive flows from the glue adding box 10 to the first glue coating roller 1 and the second glue coating roller 2, and then merges at the connecting frame 18, and then respectively branches from the second connecting plate 15 and the third connecting plate 19, and then passes through the first glue applying plate 14 and the second glue applying plate 20, and then passes through the first connecting plate 13 and the fourth connecting plate 21, and finally returns to the glue adding box 10, forming a circular flow.

[0056] Specifically, the adhesive flowing onto the base film is spread evenly by the glue spreading assembly as follows: when the base film passes through the first glue coating roller 1 and the second glue coating roller 2, it passes through the first glue spreading plate 14 and the second glue spreading plate 20. When the upper part of the base film passes through the second glue spreading plate 20, the adhesive on the upper part of the base film is spread evenly. When the lower part of the base film passes through the first glue spreading plate 14, the adhesive on the lower part of the base film is spread evenly.

[0057] During the process of the first glue plate 14 being spread evenly, excess adhesive will drip into the glue collecting groove 24. When the glue collecting groove 24 is full of adhesive, the third motor 28 is started to drive the switch door 26 to rotate into the avoidance groove 27, so that the glue collecting groove 24 is connected with the inner cavity of the first glue plate 14. Since the adhesive in the first glue plate 14 moves toward the glue adding box 10, the bottom end of the glue collecting groove 24 is tilted downward toward the glue adding box 10, so that the adhesive in the glue collecting groove 24 also has a tendency to flow toward the glue adding box 10. When the glue collecting groove 24 is connected with the inner cavity of the first glue plate 14, the adhesive in the glue collecting groove 24 will flow downstream and merge with the adhesive in the first glue plate 14, thereby preventing the excess adhesive after spreading from falling directly onto the equipment to cause waste and pollution. The process of spreading the second glue plate 20 is the same as the process of spreading the first glue plate 14.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A food packaging bag compounding device, comprising a first glue coating roller (1) and a second glue coating roller (2), characterized in that: The first glue coating roller (1) and the second glue coating roller (2) are arranged vertically, and the surfaces of the first glue coating roller (1) and the second glue coating roller (2) are both provided with a plurality of glue dripping ports (29) arranged in a circular array, and each of the glue dripping ports (29) is provided with a glue dripping control panel (5) for opening and closing the glue dripping port (29), and the same end of the first glue coating roller (1) and the second glue coating roller (2) is coaxially rotatably connected to a glue delivery pipe (9), and the ends of the two glue delivery pipes (9) are simultaneously fixedly connected to a glue adding box (10). The other ends of the first glue coating roller (1) and the second glue coating roller (2) are simultaneously rotatably connected to a connecting frame (18); the first glue coating roller (1), the second glue coating roller (2), the two glue delivery pipes (9), the glue adding box (10), and the connecting frame (18) are connected to each other; the heights of the first glue coating roller (1), the second glue coating roller (2), the two glue delivery pipes (9), and the connecting frame (18) are all lower than the glue adding box (10); and the first glue coating roller (1) and the second glue coating roller (2) rotate in opposite directions; A first glue spreading component is provided between the glue adding box (10) and the connecting frame (18), and a second glue spreading component is provided between one of the glue delivery pipes (9) and the connecting frame (18); The first glue spreading assembly comprises a first connecting plate (13), a first glue spreading plate (14) and a second connecting plate (15); one end of the first glue spreading plate (14) is fixedly connected to the first connecting plate (13), and the other end is fixedly connected to the second connecting plate (15); the first connecting plate (13) is fixedly connected to the glue adding box (10), and the second connecting plate (15) is fixedly connected to the connecting frame (18); The second glue spreading assembly comprises a third connecting plate (19), a second glue spreading plate (20) and a fourth connecting plate (21); one end of the second glue spreading plate (20) is fixedly connected to the third connecting plate (19), and the other end is fixedly connected to the fourth connecting plate (21); the fourth connecting plate (21) is fixedly connected to one of the glue delivery pipes (9); and the third connecting plate (19) is fixedly connected to the connecting frame (18); The first glue spreading plate (14) and the second glue spreading plate (20) are both fixedly connected with a partition plate (25) inside, and the first glue spreading plate (14) and the second glue spreading plate (20) are both divided into a first cavity and a glue collecting groove (24) by the partition plate (25), and the glue collecting groove (24) has an upward opening, and the bottom surface of the glue collecting groove (24) is inclined downward in the direction of the glue adding box (10), and the surface of the partition plate (25) is rotatably connected with a switch door (26), and the surface of the partition plate (25) is provided with an avoidance groove (27) for the switch door (26) to rotate, and the switch door (26) is used to control the communication between the first cavity and the glue collecting groove (24), and the bottom surfaces of the first glue spreading plate (14) and the second glue spreading plate (20) are both fixedly connected with a third motor (28), and the output end of the third motor (28) is fixedly connected to the switch door (26); The first cavity in the first glue spreading plate (14) is interconnected with the first connecting plate (13) and the second connecting plate (15), the first connecting plate (13) and the glue adding box (10) are interconnected, the second connecting plate (15) and the connecting frame (18) are interconnected, a first connecting port (16) is provided on the surface of the connecting frame (18) at the connection point of the second connecting plate (15), the first connecting port (16) is connected with the second connecting plate (15) and the connecting cavity (17) inside the connecting frame (18), the first cavity in the second glue spreading plate (20) is interconnected with the third connecting plate (19) and the fourth connecting plate (21), the third connecting plate (19) and the connecting frame (18) are interconnected, and the fourth connecting plate (21) is interconnected with one of the glue delivery pipes (9).

2. A food packaging bag compounding device according to claim 1, characterized in that: A second motor (23) is fixedly connected to the surface of the connecting frame (18); an output end of the second motor (23) is coaxially fixedly connected to one of the first glue coating roller (1) and the second glue coating roller (2); a spur gear (6) is coaxially fixedly connected to the surface of both the first glue coating roller (1) and the second glue coating roller (2), and the two spur gears (6) are meshingly connected.

3. A food packaging bag compounding device according to claim 1, characterized in that: The inner walls of the first glue coating roller (1) and the second glue coating roller (2) are both fixedly provided with a spiral conveying plate (3), and the two spiral conveying plates (3) are symmetrically arranged. The inner surface of each glue drop control plate (5) is fixedly connected to a return spring (4), and each return spring (4) is fixedly connected to the spiral conveying plate (3).

4. A food packaging bag compounding method, characterized in that: The food packaging bag compounding device according to claim 1 is used, and the specific steps are as follows: A. Pour adhesive into the adhesive adding box (10) until the adhesive fills the adhesive adding box (10), and the base film first passes through the second adhesive coating roller (2) and then passes through the first adhesive coating roller (1) in an S shape. During the process of the base film passing through the first adhesive coating roller (1) and the second adhesive coating roller (2), the glue dripping control board (5) opens the glue dripping port (29), and the adhesive flows onto the base film, so that the adhesive is applied to both the upper and lower parts of the base film. Then, the upper part of the base film is rolled and laminated with one of the laminating films, and the lower part of the base film is rolled and laminated with the other laminating film, so that the upper and lower parts of the base film are laminated at the same time; B. When the base film passes through the first glue coating roller (1) and the second glue coating roller (2), it passes through the first glue coating plate (14) and the second glue coating plate (20). When one side of the base film passes through the second glue coating plate (20), the adhesive on the side of the base film passing through the second glue coating plate (20) is evenly spread. When the other side of the base film passes through the first glue coating plate (14), the adhesive on the side of the base film passing through the first glue coating plate (14) is evenly spread. C. During the process of evenly spreading the adhesive on the first adhesive spreading plate (14) and the second adhesive spreading plate (20), excess adhesive will drip into the adhesive collecting groove (24) for collection. When the adhesive collecting groove (24) is full of adhesive, the third motor (28) is started to drive the switch door (26) to rotate into the avoidance groove (27), so that the adhesive collecting groove (24) is connected to the inner cavity of the first adhesive spreading plate (14), so that the adhesive in the adhesive collecting groove (24) flows downstream and merges with the adhesive in the first cavity.

Images