Heat sealing device of three-edge sealing bag making machine

Abstract

The utility model discloses a heat sealing device of a three-edge sealing bag making machine, which belongs to the technical field of three-edge sealing bag making machines and comprises a heat sealing box, an air exhaust mechanism is arranged on the side portion of the heat sealing box, a driving mechanism is arranged on the side portion of the heat sealing box, an inner cavity of the heat sealing box is rotatably connected with a front supporting roller, and the inner cavity of the heat sealing box is rotatably connected with a rear supporting roller. An inner cavity of the heat sealing box is rotationally connected with a rear supporting roller, and a square roller is rotationally connected to the position, located over the front supporting roller, of the inner cavity of the heat sealing box. According to the packaging bag heat sealing device, heat sealing is conducted on the two sides of a packaging bag through the two rotating heat sealing rings, transverse heat sealing is conducted on the packaging bag through the strip-shaped heat sealing cutter, the function of conducting three-edge heat sealing on the packaging bag is achieved, the two heat sealing rings can be driven to move through the two sets of electric push rods, and therefore heat sealing can be conducted on packaging bags with different widths; and the depth of the packaging bag finished product can be adjusted by controlling the up-and-down movement speed of the mounting base and the strip-shaped heat sealing cutter driven by the air cylinder, and the practicability is good.

Description

Technical Field

[0001] This utility model relates to the field of three-side sealing bag making machine technology, and more specifically, to a heat sealing device for a three-side sealing bag making machine. Background Technology

[0002] Three-side sealing bag making machine is a highly automated bag making equipment, mainly used to make flat or tubular plastic bags. Through processes such as heating, pressurizing, and cooling, the plastic film is heat-sealed at the three sides to form the required plastic bag.

[0003] Utility model patent CN220808732U discloses a heat sealing device for a three-side seal bag making machine, including a frame. A first roller and a second roller are rotatably mounted on one side of the frame, with the first roller positioned above the second roller and parallel to it. A drive device is located on the other side of the frame, and the drive device is connected to the first and second rollers. A heat sealing knife is circumferentially arranged on the outer surface of the first roller near the frame. The machine is also equipped with several second-stage heat-sealing knives. These knives are parallel to the central axis of the first roller, with one end abutting against the first knive. The pressing portions of the second and first knives are flush with each other. The pressing portions of both knives are close to the second roller with a gap. A cover is installed on the outer side of the upper part of the first roller, and a heating tube is installed inside the cover. The heating tube heats the first and second heat-sealing knives on the first roller through thermal radiation. However, the above patent has the following shortcomings: multiple second-stage heat-sealing knives can only be evenly distributed on the first roller for continuous bag-making heat sealing, making it inconvenient to adjust the bag size. Furthermore, the bag-making heat-sealing process generates a certain odor, which, if not treated, will affect the surrounding environment. Therefore, we propose a heat-sealing device for a three-side-seal bag-making machine. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a heat sealing device for a three-side sealing bag making machine.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A heat-sealing device for a three-side sealing bag making machine includes a heat-sealing box. An air extraction mechanism and a drive mechanism are provided on the side of the heat-sealing box. A front support roller and a rear support roller are rotatably connected to the inner cavity of the heat-sealing box. A square roller is rotatably connected to the inner cavity of the heat-sealing box and directly above the front support roller. Support plates are fixedly connected to the outer sides of both ends of the square roller. A set of electric push rods is fixedly installed on the inner sides of each of the two support plates. A movable plate is fixedly connected to the ends of each of the two sets of electric push rods. Both movable plates are movably sleeved on the outer sides of the square roller. A heat-sealing ring is fixedly sleeved on the outer sides of each of the two movable plates. A scale is provided on the side of the square roller. A cylinder is fixedly installed on the top of the heat-sealing box and directly above the rear support roller. The output end of the cylinder extends into the inner cavity of the heat-sealing box and is fixedly connected to a mounting base. A strip-shaped heat-sealing knife is fixedly installed on the bottom surface of the mounting base.

[0007] In a preferred embodiment of this utility model, the drive mechanism includes a servo motor fixedly mounted on the side of the heat sealing box and a synchronous pulley fixedly sleeved on one end of the rear support roller shaft. One output shaft of the servo motor is connected to one end of the front support roller shaft via a coupling. A spur gear is fixedly sleeved on the other output shaft of the servo motor. The top of the spur gear meshes with another spur gear. The other spur gear is fixedly sleeved on one end of the square roller shaft. Another synchronous pulley is fixedly sleeved on the other output shaft of the servo motor. A synchronous belt drives the two synchronous pulleys together.

[0008] As a preferred embodiment of this utility model, the air extraction mechanism includes an air suction hood fixedly sleeved on the side of the heat sealing box, an adsorption box fixedly connected to the end of the air suction hood, an air pump fixedly installed on the outside of the adsorption box, the input end of the air pump extending into the inner cavity of the adsorption box, an air guide pipe fixedly connected to the output end of the air pump, and an activated carbon plate sleeved in the inner cavity of the adsorption box.

[0009] As a preferred embodiment of this utility model, a controller is fixedly installed on the outside of the heat sealing box. The controller is electrically connected to a servo motor, a cylinder, a strip heat sealing knife, a heat sealing ring, an electric push rod, and a vacuum pump.

[0010] As a preferred embodiment of this utility model, an extrusion disc is fixedly sleeved on the outer side of the middle section of the square roller, and the outer diameter of the extrusion disc is equal to the outer diameter of the heat sealing ring, the rear support roller, and the front support roller.

[0011] As a preferred embodiment of this utility model, the outer side of the adsorption box is hinged with a sealing door, and the side of the activated carbon plate is respectively attached to the inner wall of the adsorption box and the inner side of the sealing door.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] (1) In this utility model, the two sides of the packaging bag are heat-sealed by two rotating heat-sealing rings and the packaging bag is heat-sealed laterally by a strip heat-sealing knife, thus realizing the function of heat-sealing the packaging bag on three sides. The two heat-sealing rings can be moved by two sets of electric push rods, so that packaging bags of different widths can be heat-sealed. In addition, the depth of the finished packaging bag can be adjusted by controlling the speed at which the cylinder drives the mounting base and the strip heat-sealing knife to move up and down.

[0014] (2) In this utility model, during the heat sealing process, the suction pump is used to generate suction force in the suction hood. The suction force of the suction hood is used to draw the odor gas generated by heat sealing into the inner cavity of the adsorption box. The activated carbon plate is used to adsorb the odor in the gas. The adsorbed gas is discharged to the outside through the air duct, which avoids the odor generated by heat sealing from affecting the surrounding working environment and has good practicality. Attached Figure Description

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

[0016] Figure 2 This is a schematic diagram of the overall structure of the back of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the heat sealing box of this utility model;

[0018] Figure 4 This is a cross-sectional schematic diagram of the air extraction mechanism of this utility model.

[0019] Explanation of the labels in the diagram:

[0020] 1. Heat sealing box; 2. Air extraction mechanism; 3. Front support roller; 4. Rear support roller; 5. Square roller; 6. Support plate; 7. Electric push rod; 8. Moving plate; 9. Heat sealing ring; 10. Scale; 11. Drive mechanism; 12. Extrusion plate; 13. Cylinder; 14. Mounting base; 15. Strip heat sealing knife; 16. Controller; 17. Suction hood; 18. Adsorption box; 19. Activated carbon plate; 20. Air pump; 21. Air guide pipe; 22. Sealing door; 23. Servo motor; 24. Spur gear; 25. Synchronous pulley; 26. Synchronous belt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1:

[0025] Please see Figure 1-4 A heat sealing device for a three-side sealing bag making machine includes a heat sealing box 1. An air extraction mechanism 2 and a drive mechanism 11 are located on the side of the heat sealing box 1. A front support roller 3 and a rear support roller 4 are rotatably connected to the inner cavity of the heat sealing box 1. A square roller 5 is rotatably connected to the inner cavity of the heat sealing box 1, directly above the front support roller 3. Support plates 6 are fixedly connected to the outer sides of both ends of the square roller 5. A set of electric pushers is fixedly installed on the inner sides of each of the two support plates 6. The ends of the rods 7 and the two sets of electric push rods 7 are fixedly connected to movable disks 8. The two movable disks 8 are movably sleeved on the outside of the square roller 5. The outside of the two movable disks 8 are fixedly sleeved with heat sealing rings 9. The sides of the square roller 5 are provided with scales 10. The top of the heat sealing box 1 and directly above the rear support roller 4 is fixedly installed with a cylinder 13. The output end of the cylinder 13 extends into the inner cavity of the heat sealing box 1 and is fixedly connected to a mounting base 14. The bottom surface of the mounting base 14 is fixedly installed with a strip-shaped heat sealing knife 15.

[0026] For details, please refer to Figure 1The drive mechanism 11 includes a servo motor 23 fixedly mounted on the side of the heat sealing box 1 and a synchronous pulley 25 fixedly sleeved on one end of the shaft of the rear support roller 4. One output shaft of the servo motor 23 is connected to one end of the shaft of the front support roller 3 through a coupling. Another output shaft of the servo motor 23 is fixedly sleeved with a spur gear 24. The top of the spur gear 24 meshes with another spur gear 24. The other spur gear 24 is fixedly sleeved on one end of the shaft of the square roller 5. Another synchronous pulley 25 is fixedly sleeved on the other output shaft of the servo motor 23. A synchronous belt 26 is connected between the two synchronous pulleys 25.

[0027] In this embodiment, one end of the shaft of the square roller 5 extends to the outside of the heat sealing box 1 and is fixedly sleeved with a spur gear 24. One end of the shaft of the rear support roller 4 also extends to the outside of the heat sealing box 1 and is fixedly sleeved with a synchronous wheel 25. The meshing transmission between the two spur gears 24 drives the front support roller 3, the heat sealing ring 9, and the extrusion plate 12 to drive the packaging bag in opposite rotation directions. At the same time, the two heat sealing rings 9 are used to heat seal both sides of the packaging bag. The strip heat sealing knife 15 is used to heat seal the transverse direction of the packaging bag. The continuously heat-sealed packaging bag is then cut by a cutter. The cutting device is existing technology.

[0028] For details, please refer to Figure 1 and Figure 4 The suction mechanism 2 includes a suction hood 17 fixedly sleeved on the side of the heat sealing box 1. An adsorption box 18 is fixedly connected to the end of the suction hood 17. A suction pump 20 is fixedly installed on the outside of the adsorption box 18. The input end of the suction pump 20 extends into the inner cavity of the adsorption box 18. A guide pipe 21 is fixedly connected to the output end of the suction pump 20. An activated carbon plate 19 is sleeved in the inner cavity of the adsorption box 18.

[0029] In this embodiment, the end of the vent pipe 21 can extend directly to the outside, thereby venting the gas generated by the heat sealing to the outside.

[0030] For details, please refer to Figures 1 to 4 A controller 16 is fixedly installed on the outside of the heat sealing box 1. The controller 16 is electrically connected to the servo motor 23, the cylinder 13, the strip heat sealing knife 15, the heat sealing ring 9, the electric push rod 7, and the air pump 20.

[0031] In this embodiment, the controller 16 controls the servo motor 23, cylinder 13, strip heat sealing knife 15, heat sealing ring 9, electric push rod 7, and vacuum pump 20, and the power supply of the external device supplies power to the controller 16, servo motor 23, cylinder 13, strip heat sealing knife 15, heat sealing ring 9, electric push rod 7, and vacuum pump 20.

[0032] For details, please refer to Figures 1 to 3An extrusion disc 12 is fixedly sleeved on the outer side of the middle section of the square roller 5. The outer diameter of the extrusion disc 12 is equal to the outer diameter of the heat sealing ring 9, the rear support roller 4, and the front support roller 3.

[0033] In this embodiment, the extrusion plate 12 is used to extrude and fix the middle part of the packaging bag. The thickness between the extrusion plate 12 and the front support roller 3 is adapted to the thickness of the packaging bag, so as to ensure that the front support roller 3, the extrusion plate 12 and the heat sealing ring 9 can contact the packaging bag to be heat sealed.

[0034] For details, please refer to Figure 4 The outer side of the adsorption box 18 is hinged with a sealing door 22, and the side of the activated carbon plate 19 is in contact with the inner wall of the adsorption box 18 and the inner side of the sealing door 22 respectively.

[0035] In this embodiment, the activated carbon plate 19 is replaced by opening the sealed door 22. In addition, the effective adsorption and purification of odors is ensured by the adhesion between the side of the activated carbon plate 19 and the inner wall of the adsorption box 18 and the inner side of the sealed door 22.

[0036] Working principle: In use, the raw film of the packaging bag to be heat-sealed is first placed between the front support roller 3 and the heat-sealing ring 9, while simultaneously passing the raw film over the rear support roller 4. Two sets of electric push rods 7 are then activated to move two moving discs 8, which in turn move the heat-sealing ring 9, aligning it with the two sides of the packaging bag to be heat-sealed. Then, the heat-sealing ring 9 and the strip-shaped heat-sealing knife 15 are energized to generate heat. Simultaneously, the servo motor 23 is activated, driving the front support roller 3, a spur gear 24, and a synchronous pulley 25 to rotate clockwise. Through the transmission between the synchronous pulley 25 and the synchronous belt 26, the rear support roller 4 rotates synchronously clockwise. Additionally, through the meshing transmission between the two spur gears 24, the square roller 5, the moving discs 8, the heat-sealing ring 9, and the extrusion disc 12 rotate counterclockwise. This rotation is achieved through the front support roller 4. Roller 3, extrusion disc 12, and rear support roller 4 drive the packaging bag forward. The high temperature of the two heat sealing rings 9 heat seals both sides of the packaging bag. Then, the controller 16 controls the cylinder 13 to drive the mounting base 14 and the strip heat sealing knife 15 to move up and down repeatedly, so that the strip heat sealing knife 15 heat seals the packaging bag laterally. During heat sealing, the rear support roller 4 supports the packaging bag. Afterward, the cutter cuts the heat-sealed packaging bag. Finally, during the heat sealing process, the vacuum pump 20 is started to draw air into the inner cavity of the adsorption box 18. The negative pressure in the inner cavity of the adsorption box 18 causes the suction hood 17 to generate suction. The suction of the suction hood 17 draws the odor gas generated by heat sealing into the inner cavity of the adsorption box 18. The activated carbon plate 19 adsorbs the odor in the gas. The adsorbed gas is discharged to the outside through the air duct 21.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A heat sealing device for a three-side sealing bag making machine, comprising a heat sealing box (1), characterized in that: The heat sealing box (1) is provided with an air extraction mechanism (2) on its side, and a drive mechanism (11) is provided on its side. A front support roller (3) is rotatably connected to the inner cavity of the heat sealing box (1), and a rear support roller (4) is rotatably connected to the inner cavity of the heat sealing box (1). A square roller (5) is rotatably connected to the inner cavity of the heat sealing box (1) and directly above the front support roller (3). Support plates (6) are fixedly connected to the outer sides of both ends of the square roller (5). A set of electric push rods (7) is fixedly installed on the inner side of each of the two support plates (6). 7) is fixedly connected to a movable disk (8) at its end. Both movable disks (8) are movably sleeved on the outside of the square roller (5). Both movable disks (8) are fixedly sleeved on the outside of the two movable disks (8). The square roller (5) is provided with a scale (10) on its side. A cylinder (13) is fixedly installed on the top of the heat sealing box (1) and directly above the rear support roller (4). The output end of the cylinder (13) extends into the inner cavity of the heat sealing box (1) and is fixedly connected to a mounting base (14). A strip-shaped heat sealing knife (15) is fixedly installed on the bottom surface of the mounting base (14).

2. The heat sealing device for a three-side sealing bag making machine according to claim 1, characterized in that: The drive mechanism (11) includes a servo motor (23) fixedly installed on the side of the heat sealing box (1) and a synchronous pulley (25) fixedly sleeved on one end of the shaft of the rear support roller (4). One output shaft of the servo motor (23) is connected to one end of the shaft of the front support roller (3) through a coupling. The other output shaft of the servo motor (23) is fixedly sleeved with a spur gear (24). The top of the spur gear (24) meshes with another spur gear (24). The other spur gear (24) is fixedly sleeved on one end of the shaft of the square roller (5). The other output shaft of the servo motor (23) is fixedly sleeved with another synchronous pulley (25). A synchronous belt (26) is connected between the two synchronous pulleys (25).

3. The heat sealing device for a three-side sealing bag making machine according to claim 2, characterized in that: The suction mechanism (2) includes a suction hood (17) fixedly sleeved on the side of the heat-sealing box (1), an adsorption box (18) fixedly connected to the end of the suction hood (17), a suction pump (20) fixedly installed on the outside of the adsorption box (18), the input end of the suction pump (20) extending into the inner cavity of the adsorption box (18), the output end of the suction pump (20) fixedly connected to a guide pipe (21), and an activated carbon plate (19) sleeved in the inner cavity of the adsorption box (18).

4. The heat sealing device for a three-side sealing bag making machine according to claim 3, characterized in that: A controller (16) is fixedly installed on the outside of the heat sealing box (1). The controller (16) is electrically connected to the servo motor (23), cylinder (13), strip heat sealing knife (15), heat sealing ring (9), electric push rod (7) and air pump (20).

5. The heat sealing device for a three-side sealing bag making machine according to claim 1, characterized in that: An extrusion disc (12) is fixedly sleeved on the outer side of the middle section of the square roller (5). The outer diameter of the extrusion disc (12) is equal to the outer diameter of the heat sealing ring (9), the rear support roller (4), and the front support roller (3).

6. The heat sealing device for a three-side sealing bag making machine according to claim 3, characterized in that: The adsorption box (18) is hinged to a sealing door (22) on the outside. The side of the activated carbon plate (19) is in contact with the inner wall of the adsorption box (18) and the inner side of the sealing door (22).

Images