Bottom strip heat sealing equipment for square bottom valve bag

Abstract

The utility model discloses bottom strip heat sealing equipment for a square-bottom valve bag, and particularly relates to the technical field of square-bottom valve bag production, the bottom strip heat sealing equipment comprises a conveyor used for conveying the square-bottom valve bag, and the top of the conveyor is sequentially provided with a leveling and preheating assembly and a machining assembly from right to left; the leveling and preheating assembly comprises a movable frame and a rotating roller rotationally arranged in the movable frame, and a heating rod is arranged in the rotating roller and used for conveying, leveling and preheating the square bottom valve bag; the machining assembly comprises a heat sealing mechanism and a cooling mechanism which are sequentially arranged from right to left, the heat sealing mechanism is used for conducting heat sealing on a bottom strip of the square bottom valve bag, and the cooling mechanism is used for conducting cooling shaping on the square bottom valve bag obtained after heat sealing. According to the utility model, a series of operations of continuous leveling, preheating, heat sealing and cooling shaping of the square bottom valve bag bottom strip are realized, the automation degree is high, and the processing efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of square bottom valve bag production, specifically to a bottom strip heat sealing device for square bottom valve bags. Background Technology

[0002] A square-bottom valve bag is a type of packaging bag with a square bottom and a valve design for easy filling. The bottom strip of the square-bottom valve bag is a key structural component for sealing and reinforcing the bottom of the bag. It is typically used in conjunction with the valve design to ensure the material is sealed during filling and to maintain load-bearing capacity during transport. The bottom strip of the square-bottom valve bag is fixed to the fold at the bottom of the bag using hot melt adhesive or hot air welding to ensure no leakage. For example, there is a heat-sealing device for the bottom strip in the production of square-bottom valve bags, as described in prior art publication number CN218020228U.

[0003] However, when transporting square-bottom valve bags using existing heat sealing equipment, the bags are prone to warping and unevenness under the pressure of the heat sealing plate, resulting in poor heat sealing effect. Furthermore, existing heat sealing equipment does not cool down in time after heat sealing, and the heat-sealed parts are prone to shrinkage and deformation due to residual temperature during transportation, which reduces the quality of the square-bottom valve bags. Utility Model Content

[0004] Therefore, this utility model provides a bottom strip heat sealing device for square bottom valve bags, which can level the square bottom valve bag before heat sealing and cool and shape it in time after heat sealing to ensure the quality of the square bottom valve bag.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bottom strip heat sealing device for a square bottom valve bag, comprising a conveyor for conveying the square bottom valve bag, wherein a leveling and preheating component and a processing component are arranged sequentially from right to left on the top of the conveyor.

[0006] The leveling and preheating assembly includes a movable frame and a rotating roller rotatably disposed within the movable frame. The rotating roller is equipped with a heating rod for conveying, leveling, and preheating the square bottom valve bag.

[0007] The processing components include a heat-sealing mechanism and a cooling mechanism arranged sequentially from right to left. The heat-sealing mechanism is used to heat-seal the bottom strip of the square bottom valve bag, and the cooling mechanism is used to cool and shape the bottom strip of the square bottom valve bag to avoid problems such as shrinkage and deformation of the heat-sealed part due to residual temperature during transportation, which would reduce the quality of the square bottom valve bag.

[0008] Furthermore, one end of the rotating roller is rotatably connected to one side wall inside the movable frame, and the other end of the rotating roller is fixed with a hollow rotating shaft. The end of the hollow rotating shaft away from the rotating roller is rotatably connected to another side wall inside the movable frame. The wiring end of the heating rod passes through the other end of the rotating roller and the hollow rotating shaft and is fixedly connected to another side wall inside the movable frame. The heating rod heats the rotating roller, so that the rotating roller preheats the square bottom valve bag while conveying it, which is beneficial to improve the heat sealing efficiency of the bottom strip of the square bottom valve bag.

[0009] Furthermore, a support frame is integrally formed on the other side of the rotating roller, and a motor is fixed inside the support frame. The output shaft of the motor passes through the other side of the movable frame and is connected to the hollow rotating shaft for driving the rotating roller to rotate. The rotation of the rotating roller can assist in conveying the square bottom valve bag and squeezing the square bottom valve bag.

[0010] Furthermore, a fixed frame is provided on the outside of the movable frame. The fixed frame is fixed to the frame of the conveyor. The two inner side walls of the fixed frame are slidably connected to one side of the movable frame and the side of the support frame away from the movable frame, respectively. A threaded rod passes through the top of the fixed frame. The threaded rod is threadedly connected to the fixed frame, and the bottom end of the threaded rod is rotatably connected to the top of the movable frame. This facilitates the adjustment of the height of the rotating roller, allowing the rotating roller to fit tightly against square bottom valve bags of different thicknesses, thus expanding the range of applications.

[0011] Furthermore, the heat sealing mechanism includes a heating box, and a heat sealing pressure plate is provided at the bottom of the heating box, and the heat sealing pressure plate is detachably connected to the heating box.

[0012] Furthermore, the cooling mechanism includes a cooling shell, and a shaping pressure plate is provided at the bottom end of the cooling shell, and the shaping pressure plate is detachably connected to the cooling shell.

[0013] Furthermore, an electric push rod is fixed to the top of the movable cross plate, and a bracket is fixed to the top of the electric push rod. The bracket is fixed on the frame of the conveyor, which facilitates the lifting and lowering of the heat sealing mechanism and the cooling mechanism.

[0014] Furthermore, at least one sliding sleeve is fixed to the top of both the heating box and the cooling shell. A fixing rod passes through each sliding sleeve, and the sliding sleeve and the fixing rod are slidably connected. The fixing rod is fixed to the bottom of the movable horizontal plate. Locking bolts for fixing the sliding sleeve and the fixing rod are threaded onto the sliding sleeve, which facilitates the adjustment of the position of the heat sealing mechanism and the cooling mechanism.

[0015] This utility model has the following advantages:

[0016] 1. In this utility model, while the conveyor is conveying the square bottom valve bag, the rotating roller can assist in conveying the square bottom valve bag and squeeze and flatten the square bottom valve bag. At the same time, the heating rod in the rotating roller works to heat the rotating roller, so that the rotating roller preheats the square bottom valve bag, which is beneficial to improve the heat sealing efficiency of the bottom strip of the square bottom valve bag.

[0017] 2. This utility model facilitates the adjustment of the height of the rotating roller, making it easier for the rotating roller to contact square-bottomed valve bags of different thicknesses, thus expanding its application range;

[0018] 3. In this utility model, the bottom strip of the preheated square bottom valve bag is heat-sealed by a heat-sealing mechanism. The heat-sealed square bottom valve bag is then transported to a cooling mechanism for cooling and shaping, which avoids shrinkage and deformation of the heat-sealed part due to residual temperature during the transportation process, thus ensuring the quality of the square bottom valve bag.

[0019] 4. This utility model realizes a series of continuous operations such as leveling, preheating, heat sealing, and cooling and shaping of square bottom valve bags, with a high degree of automation and high processing efficiency. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of this utility model;

[0021] Figure 2 A schematic diagram of the leveling and preheating component structure provided by this utility model;

[0022] Figure 3 This is a side sectional view of the leveling and preheating assembly provided by this utility model;

[0023] Figure 4 Provided by this utility model Figure 3 Enlarged view of section A in the middle;

[0024] Figure 5 A schematic diagram of the processing component structure provided by this utility model;

[0025] Figure 6 This is a front sectional view of the processing component provided by this utility model;

[0026] In the diagram: 1. Conveyor;

[0027] 2. Leveling and preheating components, 21. Movable frame, 22. Rotary roller, 23. Hollow rotating shaft, 24. Heating rod, 25. Support frame, 26. Motor, 27. Fixed frame, 28. Threaded rod;

[0028] 3. Processing components, 31. Movable cross plate, 32. Heat sealing mechanism, 33. Cooling mechanism, 34. Electric push rod, 35. Fixed rod, 36. Sliding sleeve, 37. Locking bolt;

[0029] 321 Heating box, 322 Heat sealing plate, 331 Cooling shell, 332 Shaping plate;

[0030] 4 supports. Detailed Implementation

[0031] Refer to the instruction manual appendix Figures 1-6This utility model provides a bottom strip heat sealing device for square bottom valve bags, including a conveyor 1 for conveying square bottom valve bags. The top of the conveyor 1 is provided with a leveling and preheating component 2 and a processing component 3 from right to left. The leveling and preheating component 2 is used to convey, level and preheat the square bottom valve bags, and the processing component 3 is used to heat seal and cool and shape the bottom strip of the square bottom valve bags.

[0032] Specifically, such as Figures 2-4 As shown, the leveling and preheating assembly 2 includes a movable frame 21 and a rotating roller 22 rotatably disposed inside the movable frame 21. One end of the rotating roller 22 is rotatably connected to one side wall inside the movable frame 21 via a rotating shaft, and the other end of the rotating roller 22 is fixed with a hollow rotating shaft 23. The end of the hollow rotating shaft 23 away from the rotating roller 22 is rotatably connected to the other side wall inside the movable frame 21.

[0033] A support frame 25 is integrally formed on the other side of the rotating roller 22. A motor 26 is fixed inside the support frame 25. The output shaft of the motor 26 passes through the other side of the movable frame 21, and the output shaft of the motor 26 is connected to the hollow rotating shaft 23. The transmission structure can be selected as needed. In this embodiment, a gear transmission structure is used as an example. When the conveyor 1 conveys the square bottom valve bag to the left, the motor 26 is started. The hollow rotating shaft 23 is driven to rotate through the gear transmission structure, thereby driving the rotating roller 22 to rotate clockwise. The rotating roller 22 assists in conveying the square bottom valve bag and simultaneously squeezes and flattens the square bottom valve bag.

[0034] Furthermore, a heating rod 24 is provided in the rotating roller 22. The heating rod 24 heats the rotating roller 22, which preheats the square bottom valve bag. This is beneficial to improve the heat sealing efficiency of the bottom strip of the square bottom valve bag. The wiring end of the heating rod 24 is fixedly connected to the other end of the rotating roller 22 and the hollow rotating shaft 23 and the other side wall inside the movable frame 21. While the rotating roller 22 rotates, the heating rod 24 remains stationary to prevent the power cord on it from twisting due to the rotation of the heating rod 24.

[0035] Furthermore, a fixed frame 27 is provided on the outside of the movable frame 21. The fixed frame 27 is fixed on the frame of the conveyor 1. The two inner side walls of the fixed frame 27 are slidably connected to one side of the movable frame 21 and the side of the support frame 25 away from the movable frame 21 via slide rails. A threaded rod 28 passes through the top of the fixed frame 27. The threaded rod 28 is threadedly connected to the fixed frame 27, and the bottom end of the threaded rod 28 is rotatably connected to the top of the movable frame 21 via a rotating shaft or bearing. Rotating the threaded rod 28 facilitates driving the movable frame 21 to move up and down along the fixed frame 27, thereby facilitating the adjustment of the height of the rotating roller 22, so that the rotating roller 22 can contact square bottom valve bags of different thicknesses, expanding the range of applications.

[0036] like Figure 1 , Figure 5 and Figure 6As shown, the processing component 3 includes a heat sealing mechanism 32 and a cooling mechanism 33 arranged sequentially from right to left. The heat sealing mechanism 32 includes a heating box 321. The bottom end of the heating box 321 is provided with a heat sealing pressure plate 322, and the heat sealing pressure plate 322 is connected to the heating box 321 by bolts, which facilitates the assembly and disassembly of the heat sealing pressure plate 322.

[0037] In this embodiment, the heating box 321 consists of a box body and a heating device inside the box body. The heating device can be a heating wire or other device. The box body is made of a material with good heat insulation properties. The heat sealing plate 322 is made of a material with good thermal conductivity such as copper or aluminum. The heating device heats the inside of the box body, and the heat is transferred to the heat sealing plate 322 to facilitate the heating of the heat sealing plate 322.

[0038] The cooling mechanism 33 includes a cooling shell 331, and a shaping pressure plate 332 is provided at the bottom of the cooling shell 331. The shaping pressure plate 332 is connected to the cooling shell 331 by bolts, which facilitates the assembly and disassembly of the shaping pressure plate 332.

[0039] In this embodiment, the cooling shell 331 consists of an outer shell and a cooling device inside the outer shell. The cooling device can be a semiconductor cooling chip or a structure that delivers coolant into the outer shell. The outer shell is made of a material with good thermal insulation. The shaping plate 332 is made of a material with good thermal conductivity, such as copper or aluminum. The cooling device cools the inside of the outer shell, and the heat is transferred to the shaping plate 332 to facilitate the cooling of the shaping plate 332.

[0040] Next, at least one sliding sleeve 36 is fixed to the top of both the heating box 321 and the cooling shell 331. A fixing rod 35 passes through each sliding sleeve 36, and the sliding sleeve 36 and the fixing rod 35 are slidably connected. The fixing rod 35 is fixed to the bottom of the movable horizontal plate 31. The sliding sleeve 36 is threaded with a locking bolt 37 for fixing the sliding sleeve 36 and the fixing rod 35.

[0041] Slide the sliding sleeve 36 along the fixed rod 35 to move the heat sealing mechanism 32 or the cooling mechanism 33 left and right, adjust the heat sealing mechanism 32 and the cooling mechanism 33 to a suitable position, and then tighten the locking bolt 37 to fix the heat sealing mechanism 32 or the cooling mechanism 33, so that the bottom strips of two adjacent square bottom valve bags on the conveyor 1 can be located directly below the heat sealing mechanism 32 and the cooling mechanism 33 respectively, so that the heat sealing mechanism 32 and the cooling mechanism 33 can accurately heat seal and cool the bottom strips of the two adjacent square bottom valve bags respectively.

[0042] An electric push rod 34 is fixed to the top of the movable horizontal plate 31, and a bracket 4 is fixed to the top of the electric push rod 34. The bracket 4 is fixed to the frame of the conveyor 1.

[0043] After preheating, the square-bottomed valve bag is conveyed to the bottom of the heat-sealing mechanism 32 and stops. The electric push rod 34 drives the movable horizontal plate 31 to descend, which in turn drives the heat-sealing mechanism 32 and the cooling mechanism 33 to descend. The descent of the heat-sealing mechanism 32 causes the heat-sealing pressure plate 322 to heat-seal the bottom strip of the square-bottomed valve bag. Then, the electric push rod 34 drives the heat-sealing mechanism 32 to rise, and the conveyor 1 continues to convey the square-bottomed valve bag. The heat-sealed square-bottomed valve bag is conveyed to the bottom of the cooling mechanism 33. At the same time, the next preheated square-bottomed valve bag is conveyed to the bottom of the heat-sealing mechanism 32. Then, the electric push rod 34 drives the heat-sealing mechanism 32 and the cooling mechanism 33 to descend again. The heat-sealing pressure plate 322 heats-seals the bottom strip of the preheated square-bottomed valve bag at its bottom. The shaping pressure plate 332 cools and shapes the bottom strip of the heat-sealed square-bottomed valve bag.

[0044] The working principle of this utility model is as follows:

[0045] First, adjust the height of the rotating roller 22, then adjust the heat sealing mechanism 32 and the cooling mechanism 33 to the appropriate positions, start the conveyor 1 to transport the square bottom valve bag to the left, and at the same time start the motor 26 to drive the rotating roller 22 to rotate clockwise. The rotating roller 22 assists in transporting the square bottom valve bag, and at the same time, the rotating roller 22 squeezes and flattens the square bottom valve bag. Meanwhile, the heating rod 24 in the rotating roller 22 works to heat the rotating roller 22, so that the rotating roller 22 preheats the square bottom valve bag, which is beneficial to improve the heat sealing efficiency of the bottom strip of the square bottom valve bag in the later stage.

[0046] Next, the preheated square bottom valve bag is transferred to the bottom of the heat sealing mechanism 32 and stops. The electric push rod 34 drives the heat sealing mechanism 32 to descend and heat seal the bottom strip of the square bottom valve bag. The heat-sealed square bottom valve bag is then transferred to the bottom of the cooling mechanism 33. The cooling mechanism 33 descends to cool and shape the bottom strip of the heat-sealed square bottom valve bag in time, so as to avoid shrinkage and deformation of the heat-sealed part due to residual temperature during the transportation process, and ensure the quality of the square bottom valve bag.

[0047] In summary, this equipment can perform a series of operations such as continuous leveling, preheating, heat sealing, and cooling and shaping of the bottom strip of square bottom valve bags. It has a high degree of automation and high processing efficiency.

Claims

1. A bottom strip heat-sealing device for a square-bottom valve bag, comprising a conveyor (1) for conveying the square-bottom valve bag, characterized in that: The top of the conveyor (1) is provided with a leveling and preheating component (2) and a processing component (3) from right to left. The leveling and preheating assembly (2) includes a movable frame (21) and a rotating roller (22) rotatably disposed within the movable frame (21). The rotating roller (22) is provided with a heating rod (24) for conveying, leveling and preheating the square bottom valve bag. The processing component (3) includes a heat sealing mechanism (32) and a cooling mechanism (33) arranged sequentially from right to left. The heat sealing mechanism (32) is used to heat seal the bottom strip of the square bottom valve bag, and the cooling mechanism (33) is used to cool and shape the bottom strip of the square bottom valve bag.

2. The bottom strip heat sealing device for a square-bottom valve bag according to claim 1, characterized in that: One end of the rotating roller (22) is rotatably connected to one side wall inside the movable frame (21), and the other end of the rotating roller (22) is fixed with a hollow rotating shaft (23). The end of the hollow rotating shaft (23) away from the rotating roller (22) is rotatably connected to the other side wall inside the movable frame (21). The wiring end of the heating rod (24) passes through the other end of the rotating roller (22) and the hollow rotating shaft (23) and is fixedly connected to the other side wall inside the movable frame (21).

3. The bottom strip heat sealing device for a square-bottom valve bag according to claim 2, characterized in that: The other side of the rotating roller (22) is integrally formed with a support frame (25), and a motor (26) is fixed inside the support frame (25). The output shaft of the motor (26) passes through the other side of the movable frame (21), and the output shaft of the motor (26) is connected to the hollow rotating shaft (23) for driving the rotating roller (22) to rotate.

4. The bottom strip heat sealing device for a square-bottom valve bag according to claim 3, characterized in that: The movable frame (21) is provided with a fixed frame (27) on the outside. The fixed frame (27) is fixed on the frame of the conveyor (1). The two inner side walls of the fixed frame (27) are slidably connected to one side of the movable frame (21) and the side of the support frame (25) away from the movable frame (21), respectively. The top of the fixed frame (27) has a threaded rod (28) that is threaded to the fixed frame (27), and the bottom of the threaded rod (28) is rotatably connected to the top of the movable frame (21) to facilitate adjustment of the height of the rotating roller (22).

5. The bottom strip heat sealing device for a square-bottom valve bag according to claim 1, characterized in that: The heat sealing mechanism (32) includes a heating box (321), and a heat sealing pressure plate (322) is provided at the bottom of the heating box (321), and the heat sealing pressure plate (322) is detachably connected to the heating box (321).

6. The bottom strip heat-sealing device for a square-bottom valve bag according to claim 5, characterized in that: The cooling mechanism (33) includes a cooling shell (331), and a shaping plate (332) is provided at the bottom of the cooling shell (331), and the shaping plate (332) is detachably connected to the cooling shell (331).

7. The bottom strip heat sealing device for a square-bottom valve bag according to claim 6, characterized in that: An electric push rod (34) is fixed at the top of the movable horizontal plate (31), and a bracket (4) is fixed at the top of the electric push rod (34). The bracket (4) is fixed on the frame of the conveyor (1) to facilitate the lifting and lowering of the heat sealing mechanism (32) and the cooling mechanism (33).

8. The bottom strip heat sealing device for a square bottom valve bag according to claim 7, characterized in that: At least one sliding sleeve (36) is fixed to the top of both the heating box (321) and the cooling shell (331). A fixing rod (35) passes through each sliding sleeve (36), and the sliding sleeve (36) and the fixing rod (35) are slidably connected. The fixing rod (35) is fixed to the bottom of the movable horizontal plate (31). The sliding sleeve (36) is threaded with a locking bolt (37) for fixing the sliding sleeve (36) and the fixing rod (35), which facilitates the adjustment of the position of the heat sealing mechanism (32) and the cooling mechanism (33).

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