Paper-plastic composite bag bottom sealing device

Abstract

The utility model provides a paper-plastic compound bag bottom sealing device which comprises a conveying device, mounting columns, a positioning assembly and a gluing assembly, the two mounting columns are vertically and symmetrically mounted at one end of the conveying device, a mounting plate is arranged at the tops of the two mounting columns, a fixed plate is further fixedly arranged on one sides of the two mounting columns, a fixed heating plate is arranged at the top of the fixed plate, and the gluing assembly is arranged on the fixing plate. A first hydraulic cylinder is fixedly arranged on the mounting plate, the output end of the first hydraulic cylinder is connected with a movable plate, a movable heating plate is arranged on the side, facing the fixed plate, of the movable plate, the positioning assembly positions and fixes the paper-plastic composite bag on the conveying device, and the gluing assembly is arranged at the top of the movable plate and used for spraying hot melt glue to an opening of the paper-plastic composite bag. The paper-plastic composite bag bottom sealing device solves the problem that in the prior art, when bottom sealing is conducted on a paper-plastic composite bag, workers need to coat the paper-plastic composite bag with hot melt adhesive in advance, then the paper-plastic composite bag is conveyed to a bottom sealing device for bottom sealing, and the efficiency is low.

Description

Technical Field

[0001] The utility model relates to the technical field of paper-plastic composite bag production, in particular to a bottom sealing device for a paper-plastic composite bag. Background Art

[0002] Paper-plastic composite bags are a type of packaging material made by combining paper and plastic film. They are widely used in the food, chemical, building materials and other industries. They have good strength, moisture resistance, and tear resistance. The bottom sealing technology is very critical in the production process and is directly related to the sealing and load-bearing capacity of the paper-plastic composite bags.

[0003] At present, when sealing the bottom of a paper-plastic composite bag, a positioning mechanism is usually used to limit and fix the paper-plastic composite bag to be sealed, and then the end of the paper-plastic composite bag is heated to melt the hot melt adhesive pre-coated on the end of the paper-plastic composite bag. The area is then pressed by a pressing device, and the bottom is sealed after the hot melt adhesive condenses. Although the automatic limiting and fixing of the bottom seal of the paper-plastic composite bag is achieved, the coating of the hot melt adhesive still needs to be performed by workers in advance, which is inefficient. In addition, the coating quality of the hot melt adhesive applied by workers to the paper-plastic composite bag is difficult to guarantee, which affects the subsequent bottom sealing quality. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a paper-plastic composite bag bottom sealing device, which solves the problem of low efficiency in the existing technology that when sealing the bottom of the paper-plastic composite bag, workers need to pre-coat hot melt glue on the paper-plastic composite bag and then send it to the bottom sealing device for sealing.

[0005] According to an embodiment of the utility model, a bottom sealing device for a paper-plastic composite bag includes a conveying device, a mounting column, a positioning assembly and a gluing assembly. The conveying device is used to convey the paper-plastic composite bag. The two mounting columns are vertically and symmetrically installed at one end of the conveying device. A mounting plate is fixedly provided on the top of the two mounting columns on the side away from the conveying device. A fixed plate is also fixed on the side of the two mounting columns facing the mounting plate. A fixed heating plate is provided on the top of the fixed plate. A first hydraulic cylinder is fixed on the mounting plate. The output end of the first hydraulic cylinder is vertically downwardly connected to a movable plate. A movable heating plate is provided on the side of the movable plate facing the fixed plate. The positioning assemblies are respectively arranged on opposite sides of the two mounting columns. The positioning assemblies position and fix the paper-plastic composite bag on the conveying device. The gluing assembly is arranged on the top of the movable plate. The gluing assembly is used to spray hot melt adhesive onto the opening of the paper-plastic composite bag.

[0006] Compared with the prior art, the utility model has the following beneficial effects: the paper-plastic composite bag is conveyed to a predetermined position by a conveying device, the positioning component positions and clamps the paper-plastic composite bag in this process, the gluing component sprays hot melt glue on the opening of the paper-plastic composite bag that enters the predetermined position, and then the first hydraulic cylinder pushes the movable plate downward so that the movable plate presses one end of the paper-plastic composite bag against the fixed plate, the fixed plate and the movable heating plate and the fixed heating plate on the movable plate heat the hot melt glue again so that the hot melt glue fits tightly to both sides of the opening of the paper-plastic composite bag, and after the pressing is completed, it is left to dry naturally, thus completing the bottom sealing operation of the paper-plastic composite bag. With this device, there is no need for workers to apply hot melt glue to the opening of the paper-plastic composite bag separately. Workers only need to place the paper-plastic composite bag to be sealed on the conveying device. The whole process is simple and fast, saving labor and time, and also improving the bottom sealing efficiency of the thermoplastic composite bag.

[0007] Furthermore, the glue coating component includes: a movable block, which is arranged on the top of the movable plate, a rotating rod is hingedly provided on the top of the movable block, a spray gun is fixed on one end of the rotating rod close to the fixed plate, and a driving component is also provided on the top of the movable block to push the rotating rod to rotate around its hinged end.

[0008] Furthermore, the driving assembly includes a push rod, which is fixedly arranged on the top of the movable block, and an output end of the push rod is hinged to an end of the rotating rod away from the spray gun.

[0009] As another embodiment, the drive assembly includes: a push rod, the output end of the push rod is vertically upward, and the top of the movable block is also provided with a return spring that pulls the end of the rotating rod away from the spray gun and abuts against the output end of the push rod.

[0010] Furthermore, it also includes vertical plates, two vertical plates are symmetrically arranged on the top of the movable plate, a screw rod is horizontally and rotatably provided between the two vertical plates, the movable block is slidingly connected to the movable plate, the screw rod is threadedly connected to the movable block, and one end of the screw rod passes through the vertical plate and is provided with a drive motor for driving it to rotate.

[0011] Furthermore, the positioning assembly includes: a positioning plate, a second hydraulic cylinder is fixedly provided on each mounting column, and the positioning plate is fixedly provided on the output end of each second hydraulic cylinder.

[0012] Furthermore, a push plate is provided vertically downward at the output end of the first hydraulic cylinder, one end of a plurality of connecting columns is fixedly provided at the bottom of the push plate, and the other end of the connecting column is fixedly connected to the movable plate.

[0013] Furthermore, it also includes a guide rod, which is fixed between the fixed plate and the mounting plate, and the movable plate is slidably connected to the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an overall structural diagram of an embodiment of the present utility model.

[0015] Figure 2 It is a front view of an embodiment of the present utility model.

[0016] Figure 3 It is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 4 This is a schematic structural diagram of the gluing component of an embodiment of the present utility model.

[0018] In the above drawings: 1. Conveying device; 2. Mounting column; 3. Mounting plate; 4. Fixed plate; 5. First hydraulic cylinder; 6. Moving plate; 7. Movable block; 8. Rotating rod; 9. Spray gun; 10. Push rod; 11. Return spring; 12. Vertical plate; 13. Screw rod; 14. Driving motor; 15. Positioning plate; 16. Second hydraulic cylinder; 17. Push plate; 18. Connecting column; 19. Guide rod. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-2As shown, an embodiment of the present invention proposes a bottom sealing device for a paper-plastic composite bag, comprising a conveying device 1, a mounting column 2, a positioning assembly and a gluing assembly. The conveying device 1 is used to convey the paper-plastic composite bag. The two mounting columns 2 are vertically and symmetrically mounted at one end of the conveying device 1. A mounting plate 3 is fixedly arranged on the top of the two mounting columns 2 on the side away from the conveying device 1. A fixed plate 4 is also fixedly arranged on the side of the two mounting columns 2 facing the mounting plate 3. A fixed heating plate is provided on the top of the fixed plate 4. A first hydraulic cylinder 5 is fixedly arranged on the mounting plate 3. The output end of the first hydraulic cylinder 5 is vertically connected to a movable plate 6 downwardly. A movable heating plate is provided on the side of the movable plate 6 facing the fixed plate 4. The positioning assemblies are respectively arranged on opposite sides of the two mounting columns 2. The positioning assembly positions and fixes the paper-plastic composite bag on the conveying device 1. The gluing assembly is arranged on the top of the movable plate 6. The gluing assembly is used to spray hot melt adhesive onto the opening of the paper-plastic composite bag. In this embodiment, the conveying device 1 is a conveyor belt. The worker opens the opening of one end of the paper-plastic composite bag so that it faces the conveying direction of the conveying device 1. During the process of the conveying device 1 conveying the paper-plastic composite bag to the fixed plate 4, the positioning component positions the paper-plastic composite bag so that the paper-plastic composite bag is located at the center of the conveying device 1. After one end of the paper-plastic composite bag is conveyed to the fixed plate 4, the conveying device 1 stops and the gluing component is started. The gluing component sprays hot melt glue to the opening of the paper-plastic composite bag. After the spraying is completed, the first hydraulic cylinder 5 and the fixed heating plate and the dynamic heating plate are started (the fixed heating plate and the dynamic heating plate convert electrical energy into The hot melt adhesive is heated by converting it into heat energy, which is the existing technology and will not be described in detail here). The first hydraulic cylinder 5 drives the movable plate 6 to move toward the fixed plate 4, and finally presses the end of the paper-plastic composite bag sprayed with the hot melt adhesive. Under the influence of the heat of the fixed heating plate and the movable heating plate, the hot melt adhesive at the opening of the paper-plastic composite bag is melted. The first hydraulic cylinder 5 is started again to drive the movable plate 6 to rise. After the hot melt adhesive solidifies, the bottom sealing of the paper-plastic composite bag is completed, thereby eliminating the need for workers to apply hot melt adhesive on the paper-plastic composite bag in advance, saving manpower and time, and realizing standardized production while improving the efficiency of the bottom sealing of the paper-plastic composite bag.

[0021] like Figure 1-4 As shown, further, the gluing assembly includes: a movable block 7, the movable block 7 is arranged on the top of the movable plate 6, the top of the movable block 7 is hingedly provided with a rotating rod 8, the end of the rotating rod 8 close to the fixed plate 4 is fixedly provided with a spray gun 9, and the top of the movable block 7 is also provided with a driving assembly for pushing the rotating rod 8 to rotate around its hinged end. Specifically, in this embodiment, the end of the rotating rod 8 connected to the spray gun 9 is a straight rod, and the other end of the rotating rod 8 is an arc-shaped rod. After the paper-plastic composite bag reaches the predetermined position, the driving assembly is started, and the driving assembly drives the rotating rod 8 to rotate around its hinged end, so that the end of the rotating rod 8 with the spray gun 9 approaches the opening of the paper-plastic composite bag. As needed, the spray gun 9 can be set to be located on one side of the paper-plastic composite bag or inserted into the opening of the paper-plastic composite bag. The spray gun 9 is connected to a device for supplying hot melt adhesive to it through a hose.

[0022] like Figure 3-4 As shown, the drive assembly further includes: a push rod 10, which is fixedly mounted on the top of the movable block 7. The output end of the push rod 10 is hinged to the end of the rotating rod 8 away from the spray gun 9. The push rod 10 is hinged to the end of the rotating rod 8. The push rod 10 is extended to drive the rotating rod 8 to rotate about its hinged end. The push rod 10 is retracted to drive the spray gun 9 to reset so that it does not block the movement of the paper-plastic composite bag. Alternatively, when the spray gun 9 is inserted into the opening of the paper-plastic composite bag, the spray gun 9 is reset to prevent the spray gun 9 from affecting the subsequent pressing of the paper-plastic composite bag.

[0023] like Figure 3-4 As shown, as another embodiment, the drive assembly includes: a push rod 10, the output end of the push rod 10 is vertically upward, and the top of the movable block 7 is also provided with a return spring 11, which pulls the end of the rotating rod 8 away from the spray gun 9 and abuts against the output end of the push rod 10. One end of the return spring 11 is connected to the top of the movable block 7, and the other end is fixedly connected to the end of the rotating rod 8 close to the push rod 10. The return spring 11 pulls one end of the rotating rod 8 to be in close contact with the output end of the push rod 10. When the push rod 10 is extended, it overcomes the elastic force of the return spring 11 and drives the rotating rod 8 to rotate around its hinged end, so that the spray gun 9 moves toward the opening of the paper-plastic composite bag. When the push rod 10 is retracted, the return spring 11 pulls the rotating rod 8 to rotate again to return to its original position.

[0024] like Figure 1-2 As shown, further, it also includes a vertical plate 12, two vertical plates 12 are symmetrically arranged on the top of the movable plate 6, and a screw rod 13 is horizontally and rotatably arranged between the two vertical plates 12. The movable block 7 is slidably connected to the movable plate 6, and the screw rod 13 is threadedly connected to the movable block 7. One end of the screw rod 13 is provided with a drive motor 14 for driving its rotation after passing through the vertical plate 12. Since the opening of the paper-plastic composite bag is not very large, in this embodiment, only one spray gun 9 is provided on the movable plate 6. By starting the drive motor 14, the drive motor 14 drives the screw rod 13 to rotate, and the screw rod 13 drives the movable block 7 threadedly connected to it to move along the length direction of the screw rod 13. The forward and reverse rotation of the drive motor 14 drives the screw rod 13 to rotate to control the reciprocating movement of the spray gun 9, so that the spray gun 9 can evenly coat the opening of the paper-plastic composite bag, thereby achieving better results when the paper-plastic composite bag is subsequently pressed and sealed. Preferably, the screw rod 13 can be a reciprocating screw rod, so that the drive motor 14 can rotate in only one direction.

[0025] like Figure 2-3As shown, the positioning assembly further includes a positioning plate 15. A second hydraulic cylinder 16 is fixedly mounted on each mounting post 2, and the positioning plate 15 is fixedly mounted on the output end of each second hydraulic cylinder 16. The two positioning plates 15 are arranged relative to each other. Driven by the second hydraulic cylinder 16, the positioning plates 15 on the two mounting posts 2 move toward each other, thereby pushing the paper-plastic composite bag to be sealed to the center of the conveyor device to achieve the purpose of positioning. On the other hand, when one end of the paper-plastic composite bag is located on the fixed plate 4, the positioning plate 15 clamps the paper-plastic composite bag to prevent it from moving, thereby improving the gluing quality of the gluing assembly.

[0026] like Figure 1-3 As shown, a push plate 17 is provided vertically downward at the output end of the first hydraulic cylinder 5. One end of a plurality of connecting columns 18 is fixedly provided at the bottom of the push plate 17. The other end of the connecting columns 18 is fixedly connected to the movable plate 6. When the first hydraulic cylinder 5 is activated, the push plate 17 is driven to move downward. When the push plate 17 moves downward, the movable plate 6 is driven downward by the downward movement of the push plate 17, so that the movable plate 6 is pressed toward the fixed plate 4.

[0027] like Figure 1-3 As shown, further, a guide rod 19 is included, which is fixedly arranged between the fixed plate 4 and the mounting plate 3, and the movable plate 6 is slidably connected to the guide rod 19. The guide rod 19 guides the movement of the movable plate 6, making the movement of the movable plate 6 in the vertical direction more stable.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A paper-plastic composite bag bottom sealing device, characterized in that: include: A conveying device (1), the conveying device (1) is used for conveying paper-plastic composite bags; Mounting columns (2), two mounting columns (2) are vertically and symmetrically mounted on one end of the conveying device (1), a mounting plate (3) is fixedly provided on the top of the two mounting columns (2) away from the conveying device (1), a fixed plate (4) is also fixedly provided on the side of the two mounting columns (2) facing the mounting plate (3), a fixed heating plate is provided on the top of the fixed plate (4), a first hydraulic cylinder (5) is fixedly provided on the mounting plate (3), an output end of the first hydraulic cylinder (5) is vertically connected to a moving plate (6), and a moving heating plate is provided on the side of the moving plate (6) facing the fixed plate (4); Positioning components, the positioning components are respectively arranged on opposite sides of the two mounting posts (2), and the positioning components position and fix the paper-plastic composite bag on the conveying device (1); The glue coating component is arranged on the top of the movable plate (6) and is used for spraying hot melt glue onto the opening of the paper-plastic composite bag.

2. The bottom sealing device for a paper-plastic composite bag according to claim 1, characterized in that: The glue coating assembly comprises: a movable block (7), the movable block (7) being arranged on the top of the movable plate (6), a rotating rod (8) being hingedly provided on the top of the movable block (7), a spray gun (9) being fixedly provided on one end of the rotating rod (8) close to the fixed plate (4), and a driving assembly for driving the rotating rod (8) to rotate around its hinged end being further provided on the top of the movable block (7).

3. The bottom sealing device for a paper-plastic composite bag according to claim 2, characterized in that: The driving assembly comprises a push rod (10), which is fixedly arranged on the top of the movable block (7), and an output end of the push rod (10) is hinged to an end of a rotating rod (8) away from the spray gun (9).

4. The bottom sealing device for a paper-plastic composite bag according to claim 2, characterized in that: The driving assembly comprises a push rod (10), the output end of which is vertically upwards, and a return spring (11) is provided on the top of the movable block (7) for pulling the rotating rod (8) away from the spray gun (9) and contacting the output end of the push rod (10).

5. The bottom sealing device for a paper-plastic composite bag according to claim 2, characterized in that: The invention also includes vertical plates (12), two vertical plates (12) are symmetrically arranged on the top of the movable plate (6), a screw rod (13) is horizontally and rotatably arranged between the two vertical plates (12), the movable block (7) is slidably connected to the movable plate (6), the screw rod (13) is threadedly connected to the movable block (7), and one end of the screw rod (13) passes through the vertical plate (12) and is provided with a driving motor (14) for driving the screw rod to rotate.

6. The bottom sealing device for a paper-plastic composite bag according to claim 1, characterized in that: The positioning assembly comprises a positioning plate (15), a second hydraulic cylinder (16) is fixedly provided on each mounting column (2), and the positioning plate (15) is fixedly provided on the output end of each second hydraulic cylinder (16).

7. The bottom sealing device for a paper-plastic composite bag according to claim 1, characterized in that: A push plate (17) is provided vertically downward at the output end of the first hydraulic cylinder (5), one end of a plurality of connecting columns (18) is fixedly provided at the bottom of the push plate (17), and the other end of the connecting column (18) is fixedly connected to the movable plate (6).

8. The bottom sealing device for a paper-plastic composite bag according to claim 1, characterized in that: The invention also comprises a guide rod (19), which is fixedly arranged between the fixed plate (4) and the mounting plate (3), and the movable plate (6) is slidably connected to the guide rod (19).

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