Adjustable hot melting bottom sealing machine

Abstract

The utility model provides an adjustable hot-melting bottom-sealing machine, which relates to the technical field of hot-melting bottom-sealing devices and comprises a conveying seat, the conveying seat is fixedly arranged, a pair of rotating wheels are rotatably arranged at two ends of the conveying seat, a conveying belt is rotatably arranged outside the two rotating wheels in a surrounding manner, and a bottom-sealing mechanism is fixedly arranged on one side of the conveying seat and used for hot-melting heating and pressing. The adjustable support comprises a supporting plate, the supporting plate is arranged on the side wall of the conveying base in an up-down sliding mode and can be fixed through a locking piece arranged on the side wall of the conveying base, a pressing base is horizontally arranged on the upper portion of the supporting plate in the conveying direction, and a plurality of pressing wheels are arranged at the bottom of the pressing base in a sliding mode. The height of the sealing device can be rapidly adjusted according to bag bodies with different thicknesses through the fixing of the locking piece, bidirectional mechanical constraint capable of being matched with the thicknesses of the bag bodies is formed, and the problem that in the prior art, the sealing requirements of the bag bodies with different thicknesses cannot be rapidly met is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of hot melt sealing devices, and in particular to an adjustable hot melt sealing machine. Background Technology

[0002] As a key piece of equipment in the modern packaging industry, the hot melt sealing machine's core advantage lies in achieving efficient and seamless sealing through the hot-pressing penetration of hot melt adhesive film. This equipment drives the packaging bag to move at a uniform speed through a precisely designed conveying system and maintains the stability of the bag's trajectory by relying on a pressing structure. When the part of the bag to be sealed is accurately guided into the hot-pressing sealing area, the heated hot melt adhesive film combines with the packaging material at the molecular level under specific pressure. The adhesive fully fills the gaps between the material fibers and forms a sealing structure with a certain strength after cooling.

[0003] Existing hot melt sealing machines typically employ a rigid, fixed pressing structure, using pressing rollers to provide stable pressure support to the bag body to ensure the orderly operation of automated packaging production. However, when processing thickened or ultra-thin packaging bags, constant pressure can easily lead to excessive pressure on the bag body, causing deformation (such as in paper-plastic composite bags), or insufficient pressure, resulting in localized pressure loss and bag slippage. Such dynamic instability directly causes process defects such as seal line misalignment and uneven film penetration. Furthermore, mechanical structure adjustments to adapt to different bag sizes require long production interruptions to sequentially adjust and verify individual pressing rollers, resulting not only in wasted time but also impacting the process stability of continuous production systems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an adjustable hot melt sealing machine, which solves the problem that existing technologies cannot quickly adapt to the sealing needs of bags of different thicknesses.

[0005] According to an embodiment of the present utility model, an adjustable hot melt bottom sealing machine includes a conveyor seat, which is fixedly installed. A pair of rotating wheels are rotatably installed at both ends of the conveyor seat, and a conveyor belt is rotatably installed around the two rotating wheels. A bottom sealing mechanism is fixedly installed on one side of the conveyor seat for hot melting heating and pressing.

[0006] An adjustable bracket includes a support plate that is slidably mounted on the side wall of the conveyor seat and can be fixed by a locking member mounted on the side wall of the conveyor seat. A pressing seat is horizontally mounted on the upper part of the support plate along the conveying direction, and several pressing wheels are slidably mounted on the bottom of the pressing seat.

[0007] The technical principle of this utility model is as follows: When in use, the bag with hot melt adhesive on the bottom is placed on the conveyor belt, the part to be sealed is aligned with the side where the bottom sealing mechanism is located, the number of pressing rollers is reasonably set, and the distance between the adjustable bracket and the conveyor belt is adjusted so that the pressing rollers can press against the conveyor belt, forming a two-way mechanical constraint that can adapt to the thickness of the bag. Under the double pressing action, the bag is stably conveyed to the position of the bottom sealing mechanism along the preset trajectory. The bottom sealing mechanism heats and presses the bottom of the bag to complete the bottom sealing.

[0008] Furthermore, the sealing mechanism includes a sealing platform and sealing rollers. The sealing platform is close to the conveyor seat and its top surface is flush with the conveying surface of the conveyor belt. A plurality of sealing rollers are arranged side by side and rotated on the sealing platform along the conveying direction, close to the top surface of the sealing platform. A heating wire is fixedly installed inside the sealing rollers.

[0009] Furthermore, the side wall of the conveyor seat is fixedly provided with a longitudinal sliding groove, the lower section of the support plate is slidably disposed in the longitudinal sliding groove, the groove wall of the longitudinal sliding groove is also provided with a guide groove in the same direction, and the side wall of the support plate is provided with a guide block that can be embedded in the guide groove and slide relative to it.

[0010] Furthermore, the locking component includes a rotating rod that passes through the bottom of the longitudinal sliding groove and is rotatably disposed within the longitudinal sliding groove. A knob is fixedly connected to the bottom of the rotating rod, and an external thread is fixedly arranged around the portion of the rotating rod within the longitudinal sliding groove. The external thread is threadedly connected to the bottom of the support plate, and a first bolt is threadedly connected to the side wall of the conveyor seat. The first bolt can be threaded into the conveyor seat and abut against the rotating rod.

[0011] Furthermore, several of the longitudinal sliding grooves are symmetrically fixedly arranged on the side walls of the conveyor seats on both sides of the conveyor belt. A connecting rod is fixedly connected to each pair of support plates on opposite sides. A sliding seat is slidably arranged on the connecting rod. The bottom of the sliding seat is detachably fixedly connected to the top of the pressing seat.

[0012] Furthermore, a second bolt is threaded onto the top of the sliding seat, which can be screwed into the sliding seat and abut against the connecting rod, and a clearance groove is provided at the bottom of the sliding seat.

[0013] Furthermore, a cross groove is provided inside the clamping seat along the conveying direction, and the top and bottom ends of the cross groove penetrate the upper and lower ends of the clamping seat, and the clamping wheel is slidably disposed in the cross groove.

[0014] Furthermore, the groove walls on both sides of the cross groove are also provided with pressing grooves, and a pressure plate is slidably arranged in the pressing groove. A third bolt is threadedly connected to the outer wall of the pressing seat. The end of the third bolt is fixedly connected to the pressure plate. The third bolt can be screwed into the pressing seat so that the pressure plate presses against the pressing wheel.

[0015] Furthermore, the clamping wheel includes a cross block and a roller. The cross block can be embedded in the cross groove and slide relative to it. The bottom of the cross block is connected to a U-shaped frame by a spring. The roller is rotatably disposed in the U-shaped frame. The top of the cross block is fixedly connected to a movable handle.

[0016] Compared with existing technologies, this utility model has the following advantages: By adjusting the height of the bracket and fixing it with locking components, the height can be quickly adjusted according to the thickness of the bag, forming a two-way mechanical constraint that can adapt to the thickness of the bag. This eliminates the risk of deformation of thick-walled bags under pressure and avoids slippage of thin-walled materials due to insufficient clamping force. At the same time, relying on the rapid adjustment characteristics of the mechanical structure, the equipment can complete the precise matching of sealing parameters for multiple specifications of bags without interrupting the production process. Ultimately, it achieves multiple technical effects such as improving the accuracy of the sealing line, enhancing the bonding strength, and optimizing the changeover efficiency of the production line. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0018] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0019] Figure 3 for Figure 1 Enlarged schematic diagram of the structure at point B.

[0020] Figure 4 This is a schematic diagram of the bottom sealing mechanism according to an embodiment of the present utility model.

[0021] Figure 5 This is a schematic cross-sectional view of the adjustable bracket according to an embodiment of the present invention.

[0022] Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point C.

[0023] Figure 7 This is a schematic diagram of the pressure wheel structure according to an embodiment of the present utility model.

[0024] In the above attached diagram: 1. Conveyor seat; 11. Conveyor belt; 12. Support leg; 13. Longitudinal slide groove; 131. Guide slide groove; 14. First bolt; 2. Support plate; 21. Rotating rod; 211. Knob; 22. External thread; 23. Connecting rod; 24. Sliding seat; 241. Second bolt; 242. Relief groove; 25. Guide block; 3. Pressing seat; 31. Cross groove; 311. Pressing groove; 32. Movable plate; 4. Pressing wheel; 41. Moving handle; 42. Cross block; 43. Spring; 44. Anti-deviation column; 441. Limiting plate; 45. U-shaped frame; 46. Roller; 5. Bottom sealing mechanism; 51. Bottom sealing platform; 52. Bottom sealing roller; 6. Pressure plate; 61. Third bolt. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1-4 As shown in the figure, this utility model embodiment proposes an adjustable hot melt sealing machine, including a conveyor seat 1. Support legs 12 are fixedly connected to the four corners of the side wall of the conveyor seat 1 for horizontal support and fixation. A pair of rotating wheels are rotatably arranged at both ends of the conveyor seat 1. A drive source for driving the rotating wheels is fixedly arranged inside the conveyor seat 1. In this embodiment, the drive source can be a motor. A conveyor belt 11 is rotatably arranged around the two rotating wheels. The top conveying surface of the conveyor belt 11 is set horizontally for conveying the bag. A sealing mechanism 5 is fixedly arranged on one side of the conveyor seat 1 for hot melt heating and pressing. Specifically, the sealing mechanism 5 includes a sealing platform 51 and a sealing roller 52. The sealing platform 51 is close to the conveyor seat 1, and its top surface is flush with the conveying surface of the conveyor belt 11. During the conveying process, the part of the bag to be sealed extends beyond the conveyor belt 11, and its movement trajectory coincides with the position of the sealing platform 51, so that the part of the bag to be sealed moves with the conveyor belt. The belt 11 can be accurately moved onto the sealing platform 51. Several sealing rollers 52 are arranged side by side and rotated on the sealing platform 51, close to the top surface of the sealing platform 51 and along the conveying direction. The gap between the sealing rollers 52 and the sealing platform 51 can gradually decrease along the conveying direction, so that the sealing rollers 52 can gradually press the bag body at a certain rate when sealing the bottom, making the adhesive film penetration more uniform. A heating wire is fixedly installed inside the sealing roller 52. The heating wire can generate heat for the sealing roller 52 to heat melt the adhesive film. Preferably, the temperature of multiple sealing rollers 52 can be gradually increased along the conveying direction by the heating wire. The sealing roller 52 that contacts the bag body first preheats the adhesive film of the part of the bag body to be sealed. The sealing rollers 52 that contact the bag body later heat melt the adhesive film, so that the molten adhesive film penetrates evenly into the gaps of the bag body material to form a stable sealing structure. Multi-stage temperature control can ensure that the adhesive film is in the optimal viscous flow state, avoid insufficient adhesive film penetration or excessive heat melting, and ensure the sealing effect.

[0027] like Figure 1-5 As shown in the figure, this utility model embodiment proposes an adjustable hot melt sealing machine, which also includes an adjustable bracket. The adjustable bracket includes a support plate 2. A longitudinal sliding groove 13 is fixedly provided on the side wall of the conveyor seat 1. The lower section of the support plate 2 is slidably disposed in the longitudinal sliding groove 13. Guide grooves 131 are also provided in the same direction on the groove wall of the longitudinal sliding groove 13. The guide grooves 131 are preferably disposed on opposite sides of the longitudinal sliding groove 13. The length of the guide grooves 131 is close to the length of the longitudinal sliding groove 13. A guide block 25 is provided on the side wall of the support plate 2, which can be embedded in the guide grooves 131 and slide relative to each other. The guide grooves 131 enable the support plate 2 to slide stably in the longitudinal sliding grooves 13. A locking member is also fixedly provided on the side wall of the conveyor seat 1 to fix the support plate 2. The locking member includes a pin that can be inserted into the pin hole to fix the support plate 2, a buckle that can be embedded in the support plate 2 to engage, or other means that can fix the support plate 2. In this embodiment, the locking component includes a rotating rod 21, which passes through the bottom of the longitudinal sliding groove 13 and is rotatably disposed within the longitudinal sliding groove 13. The bottom of the rotating rod 21 extends out of the conveying seat 1 and is fixedly connected to a knob 211. The portion of the rotating rod 21 within the longitudinal sliding groove 13 is fixedly surrounded by an external thread 22, which is threadedly connected to the bottom of the support plate 2. The bottom of the support plate 2 is provided with an internal thread structure that can mesh with the external thread 22. By rotating the rotating rod 21, the up-and-down movement of the support plate 2 can be precisely controlled. A first bolt 14 is threadedly connected to the side wall of the conveying seat 1. The first bolt 14 can be threaded into the conveying seat 1 and abut against the rotating rod 21 to further fix the support plate 2. A pressing seat 3 is horizontally disposed on the upper part of the support plate 2 along the conveying direction, and several pressing wheels 4 are slidably disposed on the bottom of the pressing seat 3 along the conveying direction.

[0028] The technical principle of this utility model is as follows: When in use, the bag with hot melt adhesive on the bottom is placed on the conveyor belt 11, the bottom to be sealed is aligned with the side of the sealing platform 51, the number of pressing rollers 4 is reasonably set, and the distance between the adjustable bracket and the conveyor belt 11 is adjusted so that the pressing rollers 4 can press against the conveyor belt 11, forming a two-way mechanical constraint that can adapt to the thickness of the bag. Under the double pressing action, the bag is stably conveyed to the position of the sealing platform 51 along the preset trajectory. The sealing roller 52 heats and presses the bottom of the bag to complete the sealing.

[0029] This invention features an adjustable bracket that slides up and down and is fixed by a locking mechanism. This allows for rapid height adjustment based on bag thicknesses, creating a bidirectional mechanical constraint that adapts to bag thicknesses. This eliminates the risk of deformation under pressure in thick-walled bags and avoids slippage in thin-walled materials due to insufficient clamping force. Furthermore, the rapid adjustment capability of the mechanical structure enables precise matching of sealing parameters for multiple bag sizes without interrupting the production process. Ultimately, this achieves multiple technical benefits, including improved sealing line accuracy, enhanced interface bonding strength, and optimized production line changeover efficiency.

[0030] like Figure 1-5 As shown, according to another embodiment, further, a plurality of the longitudinal sliding grooves 13 are symmetrically fixedly arranged on the side walls of the conveyor seat 1 on both sides of the conveyor belt 11. In this embodiment, the number of the longitudinal sliding grooves 13 is set to four. The four longitudinal sliding grooves 13 are symmetrically distributed at both ends of the conveyor seat 1 with the conveying centerline of the conveyor belt 11 as the axis of symmetry. A connecting rod 23 is fixedly connected to each pair of support plates 2 on opposite sides. The two ends of the connecting rod 23 are fixed by bolts. A sliding seat 24 is slidably arranged on the connecting rod 23. A second bolt 241 is threadedly connected to the top of the sliding seat 24. The second bolt 241 can be screwed into the sliding seat 24 and abut against the connecting rod 23 to fix the sliding seat 24. A clearance groove 242 is provided at the bottom of the sliding seat 24. The clearance groove 242 can provide convenient conditions for the sliding of the pressure wheel 4 and avoid obstruction during the sliding process. The bottom of the sliding seat 24 is detachably fixedly connected to the top of the pressure seat 3 by bolts. In this embodiment, the sliding seat 24 can slide to change the overall position of the pressing seat 3, thereby pressing different positions of the bag. At the same time, the number of sliding seats 24 can be increased or decreased according to actual needs, thereby changing the pressing effect of the pressing seat 3 on the bag. Multiple adjustment methods greatly improve the applicability of this device. The pressing seat 3 can also be quickly disassembled to facilitate the replacement of pressing wheels 4 of different sizes, further improving production efficiency.

[0031] like Figure 1-5As shown, according to another embodiment, further, a cross groove 31 is provided in the clamping seat 3 along the conveying direction. The top and bottom ends of the cross groove 31 penetrate the upper and lower ends of the clamping seat 3. The clamping wheel 4 is slidably disposed in the cross groove 31. The position of the clamping wheel 4 can be reasonably set according to actual needs. One end of the clamping seat 3 is set as an opening and is detachably connected to a movable plate 32 by bolts. The movable plate 32 can be removed to facilitate the installation and removal of the clamping wheel 4. The clamping wheel 4 includes a cross block 42 and a roller 46. The cross block 42 can be embedded in the cross groove 31 and slide relative to it. A movable handle 41 is fixedly connected to the top of the cross block 42. The movable handle 41 extends out of the clamping seat 3 to facilitate its sliding. A U-shaped frame 45 is connected to the bottom of the cross block 42 by a spring 43. The opening of the U-shaped frame 45 faces downward. The roller 46 is rotatably disposed in the U-shaped frame 45. A protective device is fixedly connected to the bottom of the cross block 42. The anti-deviation column 44 penetrates the U-shaped frame 45 and is fixedly connected to a larger diameter limiting plate 441 at its end. The anti-deviation column 44 ensures that the spring 43 remains stable during its up-and-down extension and contraction. It is worth noting that even when the spring 43 is at its compression limit, the limiting plate 441 will not contact the roller 46. Furthermore, the two sides of the cross groove 31 are also provided with a pressing groove 311 of the same length. A pressure plate 6 is slidably arranged in the pressing groove 311. A third bolt 61 is threadedly connected to the outer side wall of the pressing seat 3 near the pressure plate 6. The end of the third bolt 61 is fixedly connected to the pressure plate 6. The third bolt 61 can be screwed into the pressing seat 3 to make the pressure plate 6 press against the pressing wheel 4. The pressure plate 6 can simultaneously press and fix all the pressing wheels 4, avoiding the tedious operation of fixing the pressing wheels 4 one by one, and further increasing the convenience and practicality of the device.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adjustable hot tacking machine characterized by, include: A conveyor seat (1) is fixedly installed. A pair of rotating wheels are rotatably installed at both ends of the conveyor seat (1). A conveyor belt (11) is rotatably installed around the two rotating wheels. A bottom sealing mechanism (5) is fixedly installed on one side of the conveyor seat (1) for hot melting heating and pressing. An adjustable bracket is provided, which includes a support plate (2). The support plate (2) is slidably disposed on the side wall of the conveyor seat (1) and can be fixed by a locking member disposed on the side wall of the conveyor seat (1). A pressing seat (3) is horizontally disposed on the upper part of the support plate (2) along the conveying direction. Several pressing wheels (4) are slidably disposed on the bottom of the pressing seat (3).

2. The adjustable hot melt sealing machine as described in claim 1, characterized in that: The sealing mechanism (5) includes a sealing platform (51) and a sealing roller (52). The sealing platform (51) is close to the conveyor seat (1) and its top surface is flush with the conveying surface of the conveyor belt (11). A plurality of sealing rollers (52) are arranged side by side and rotated on the sealing platform (51) close to the top surface of the sealing platform (51) along the conveying direction. A heating wire is fixedly installed inside the sealing roller (52).

3. An adjustable hot melt sealing machine as described in claim 1, characterized in that: The side wall of the conveyor seat (1) is fixedly provided with a longitudinal sliding groove (13), the lower section of the support plate (2) is slidably disposed in the longitudinal sliding groove (13), the longitudinal sliding groove (13) is also provided with a guide groove (131) in the same direction on the groove wall, and the side wall of the support plate (2) is provided with a guide block (25) that can be embedded in the guide groove (131) and slide relative to it.

4. The adjustable hot tacking machine of claim 3 wherein: The locking component includes a rotating rod (21), which passes through the bottom of the longitudinal sliding groove (13) and is rotatably disposed within the longitudinal sliding groove (13). A knob (211) is fixedly connected to the bottom of the rotating rod (21). An external thread (22) is fixedly arranged around the part of the rotating rod (21) within the longitudinal sliding groove (13). The external thread (22) is threadedly connected to the bottom of the support plate (2). A first bolt (14) is threadedly connected to the side wall of the conveying seat (1). The first bolt (14) can be threaded into the conveying seat (1) and abut against the rotating rod (21).

5. An adjustable hot tacking machine as claimed in claim 4 wherein: Several longitudinal sliding grooves (13) are symmetrically fixed on the side walls of the conveyor seat (1) on both sides of the conveyor belt (11). A connecting rod (23) is fixedly connected to each pair of support plates (2) on opposite sides. A sliding seat (24) is slidably arranged on the connecting rod (23). The bottom of the sliding seat (24) is detachably fixedly connected to the top of the pressing seat (3).

6. An adjustable hot tacking machine as claimed in claim 5 wherein: The top of the sliding seat (24) is threaded with a second bolt (241), which can be screwed into the sliding seat (24) and abut against the connecting rod (23). The bottom of the sliding seat (24) is provided with a relief groove (242).

7. An adjustable hot melt sealing machine as described in claim 1, characterized in that: The clamping seat (3) is provided with a cross groove (31) along the conveying direction. The top and bottom of the cross groove (31) pass through the upper and lower ends of the clamping seat (3). The clamping wheel (4) is slidably disposed in the cross groove (31).

8. An adjustable hot tacking machine as claimed in claim 7 wherein: The cross groove (31) is also provided with a pressing groove (311) on both sides of the groove wall. A pressure plate (6) is slidably arranged in the pressing groove (311). A third bolt (61) is threaded through the outer wall of the pressing seat (3). The end of the third bolt (61) is fixedly connected to the pressure plate (6). The third bolt (61) can be threaded into the pressing seat (3) so that the pressure plate (6) abuts against the pressing wheel (4).

9. An adjustable hot melt sealing machine as described in claim 8, characterized in that: The clamping wheel (4) includes a cross block (42) and a roller (46). The cross block (42) can be embedded in the cross groove (31) and slide relative to it. The bottom of the cross block (42) is connected to a U-shaped frame (45) by a spring (43). The roller (46) is rotatably disposed in the U-shaped frame (45). The top of the cross block (42) is fixedly connected to a movable handle (41).

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