Bag opening recovery and air exhaust sealing all-in-one machine and method suitable for square-opening ton bag

Abstract

The invention discloses a bag opening recovery and air exhaust sealing all-in-one machine and method suitable for a square-opening ton bag, and belongs to the field of packaging machinery. The bag opening recovery and air exhaust sealing all-in-one machine comprises a frame body, a lifting mechanism is arranged on the frame body, a bag opening recovery mechanism is arranged in the middle of a lifting frame, and swing heat sealing mechanisms are symmetrically arranged on the two sides of the bag opening recovery mechanism; the bag opening recovery mechanism comprises a first inner bag opening unit and a second inner bag opening unit, the first inner bag opening unit and the second inner bag opening unit can move in the left-right direction in the face-to-face or back-to-back direction, the first inner bag opening unit comprises a first inner supporting plate, the first inner supporting plate can move in the face-to-face or back-to-back direction, and the second inner bag opening unit comprises a second inner supporting plate. The second inner supporting plates can move face to face or back to back in the front-back direction, two sets of M-edge reset plates which are symmetrically arranged in the front-back direction are arranged between the first inner supporting plates and the second inner supporting plates, and the M-edge reset plates can move face to face or back to back in the front-back direction. According to the invention, the integrated automatic operation of M-edge recovery, air exhaust and sealing of the square-opening ton bag is realized, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to an integrated machine and method for restoring and sealing the opening of square-mouth ton bags, belonging to the field of packaging machinery. Background Technology

[0002] Square-mouth ton bags are a commonly used type of flexible container bag and are widely used in the packaging industry. In order to ensure the heat sealing effect, the square opening of the bag needs to be folded back to its original shape before sealing. Currently, the bag opening is usually straightened manually and then manually fed into the sealing machine for sealing. Existing automatic bag opening restoration mechanisms cannot achieve bag opening shaping of square-mouth ton bags, and after the bag opening is restored, it still needs to be sent to a designated position for air extraction and sealing, which makes the overall packaging production line complex, inefficient and space-consuming. Summary of the Invention

[0003] To address the issues of low automation and low efficiency in existing square-mouth ton bag edge restoration and vacuum sealing integration methods, this invention proposes an integrated machine for square-mouth ton bags that combines edge restoration and vacuum sealing. The machine includes a frame with a lifting mechanism connected to it. The restoration heat-sealing component is driven vertically by the lifting mechanism. The restoration heat-sealing component comprises a lifting frame, a swing heat-sealing mechanism, and a bag edge restoration mechanism. The lifting frame is connected to the lifting mechanism, with the bag edge restoration mechanism located in the middle. Swing heat-sealing mechanisms are symmetrically positioned on either side of the bag edge restoration mechanism. When the swing heat-sealing mechanism swings to its lower position, it can clamp and restore the bag edge. The bag opening is then heat-sealed. The bag opening restoration mechanism includes a first inner support bag unit and a second inner support bag unit arranged opposite to each other. The first inner support bag unit and the second inner support bag unit can move towards or away from each other in the left-right direction. The first inner support bag unit includes two sets of first inner support plates arranged symmetrically front to back. The first inner support plates can move towards or away from each other in the front-back direction. The second inner support bag unit includes two sets of second inner support plates arranged symmetrically front to back. The second inner support plates can move towards or away from each other in the front-back direction. Two sets of M-side reset plates arranged symmetrically front to back are provided between the first inner support plates and the second inner support plates. The M-side reset plates can move towards or away from each other in the front-back direction.

[0004] The first inner support plate is a hollow structure with ventilation at both ends. The exhaust port at the upper end of the first inner support plate is connected to the air extraction mechanism. The first inner support plate is driven by a lifting cylinder to achieve vertical lifting action.

[0005] The first inner support bag unit also includes a first transverse sliding seat, which is driven by a first transverse sliding cylinder to move horizontally left and right. The cylinder body of the first transverse sliding cylinder is hinged to the lifting frame. The first inner support plate is driven by a first longitudinal sliding cylinder to move horizontally back and forth. The cylinder body of the first longitudinal sliding cylinder is hinged to the first transverse sliding seat. The cylinder rod of the first longitudinal sliding cylinder is connected to the cylinder body of the lifting cylinder through a connecting seat. The cylinder rod of the lifting cylinder is connected to the first inner support plate.

[0006] The second inner support bag unit also includes a second transverse sliding seat, which is driven by a second transverse sliding cylinder to move horizontally left and right. The cylinder body of the second transverse sliding cylinder is hinged to the lifting frame. The second inner support plate is driven by a second longitudinal sliding cylinder to move horizontally back and forth. The cylinder body of the second longitudinal sliding cylinder is hinged to the second transverse sliding seat.

[0007] The M-side reset plate is driven by a third longitudinal cylinder to move horizontally back and forth, and the cylinder body of the third longitudinal cylinder is hinged to the lifting frame.

[0008] The swing heat sealing mechanism includes two sets of heat sealing swing frames arranged symmetrically on the left and right. The free end of the heat sealing swing frame is provided with a pressure roller. The heat sealing swing frame is driven by a drive mechanism to realize the swing opening and closing action of the pressure roller. The outer side of the pressure roller is also provided with a heat sealing component. The heat sealing component is driven by a heat sealing cylinder to realize horizontal movement. The cylinder body of the heat sealing cylinder is connected to the heat sealing swing frame.

[0009] The drive mechanism is located at the front and rear ends of the heat-sealing swing frame. It includes a vertically arranged linear cylinder. The cylinder body of the linear cylinder is connected to the lifting frame. The cylinder rod of the linear cylinder is hinged to the upper end of a vertically arranged rack. Both ends of the rack are meshed with gears. The gears are hinged to the lower end of the lifting frame through a connecting shaft. The connecting shaft is connected to the end of the heat-sealing swing frame.

[0010] This invention also proposes a method for restoring and sealing the opening of square-mouth ton bags, which includes the following steps:

[0011] S1 Bag Opening Reset: After the material is unloaded, the external robotic arm grips the four corners of the bag opening, and the external conveyor transports the bag body to the working position. The lifting frame descends vertically, so that the two sets of first inner support plates and two sets of second inner support plates extend into the bag opening a certain distance. At this time, the two sets of M-side reset plates are located on the outside of the bag opening. The first inner support plate and the second inner support plate move in opposite directions synchronously to open the bag opening into a square shape from the inside. At this time, the two sets of M-side reset plates are located at the center line of the M side of the bag opening. The external robotic arm releases the bag opening, and the M-side reset plates move towards each other and move closer to the center. At the same time, the first inner support plate and the second inner support plate that opened the bag opening move towards each other synchronously and move closer to the center. After the bag opening is in place, it is restored to an M shape.

[0012] S2 bag mouth air extraction: During the process of the first inner support plate moving towards the center and returning to its original position, the first inner support plate moves vertically downwards at the same time. The two sets of heat sealing swing frames swing downwards to close the pressure roller and clamp the first inner support plate and press the bag mouth. At this time, the lower end of the first inner support plate is located below the pressure roller. The air extraction mechanism works to discharge the air in the bag through the first inner support plate.

[0013] S3 Heat Sealing: After the air extraction is completed, the first inner support plate rises vertically back to its original position. At the same time, the lifting frame rises a certain distance so that the pressure roller rolls upward over the bag opening and flattens the bag opening. At this time, the heat sealing component extends out to clamp the flattened bag opening and then heats it to complete the heat sealing.

[0014] The beneficial effects of this invention are:

[0015] A. The integrated automated operation of restoring the M-side of a square-mouth ton bag, evacuating and sealing can be achieved by using a swing heat sealing mechanism and a bag mouth restoration mechanism. The overall space is small, and after the bag mouth is restored, evacuation and sealing can be performed directly, avoiding damage to the bag mouth shape again during the evacuation process. This improves work efficiency and enhances the reliability of the equipment.

[0016] B. Using two sets of first inner support plates and two sets of second inner support plates, the bag opening is corrected from the inside and fully opened into a square shape, keeping the bag opening taut. This ensures that the M-side reset plate can restore the bag opening from the center line of the M-side, and also prevents wrinkles from forming after the bag opening is restored.

[0017] C. After the square-mouth ton bag is restored, the M-sides on both sides are already close to the middle of the bag. Traditional suction pipe structures cannot be inserted into the bag from the middle for suction; they can only be inserted by opening the M-sides. When the multiple M-sides are opened, the suction pipe is easily inserted outside the bag opening. However, the two sets of liftable first inner support plates have a suction function that allows air to pass through from top to bottom. They are lowered simultaneously during the bag opening restoration process to prepare for suction. This simplified and integrated design significantly improves the compactness and operational reliability of the equipment.

[0018] D. By utilizing the pressure roller at the free end of the heat-sealing swing frame, the pressure roller is closed to clamp the first inner support plate and press down the bag opening before air is extracted. This can improve the extraction efficiency, shorten the extraction time, and prevent external air from re-entering the bag after extraction, thus ensuring a good extraction effect.

[0019] E. The lifting action of the pressure roller is used to flatten the restored bag opening a second time, further ensuring the flatness of the bag opening and preventing wrinkles from appearing at the bag opening after sealing, thus achieving a good heat sealing effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2This is a schematic diagram of the structure of the restored heat-sealed component.

[0022] Figure 3 This is a structural schematic diagram of the first inner support bag unit.

[0023] Figure 4 This is a structural schematic diagram of the second inner support bag unit.

[0024] Figure 5 This is a schematic diagram of the swing heat sealing mechanism.

[0025] Figure 6 This is a schematic diagram showing the state of the ton bag opening being prepared for restoration.

[0026] Figure 7 This is a schematic diagram showing the state of the ton bag after the opening has been restored.

[0027] Figure 8 This is a schematic diagram showing the air being drawn from the opening of a ton bag.

[0028] Figure 9 This is a schematic diagram showing the heat-sealed state of the ton bag opening. Detailed Implementation

[0029] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the embodiments of the present invention are described in detail below with reference to the accompanying drawings. The drawings and embodiments are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0030] See Figures 1-3The first objective of this invention is to provide an integrated machine for restoring and sealing the opening of square-mouth ton bags. It includes a frame 1 with a lifting mechanism 2 connected to it. A restoration and heat-sealing component 3 is connected to the lifting mechanism 2 and is driven vertically by the lifting mechanism 2. The restoration and heat-sealing component 3 includes a lifting frame 31, a swinging heat-sealing mechanism 32, and a bag opening restoration mechanism. The lifting frame 31 is connected to the lifting mechanism 2. The bag opening restoration mechanism is located in the middle of the lifting frame 31, and the swinging heat-sealing mechanisms 32 are symmetrically arranged on both sides of the bag opening restoration mechanism. When the swinging heat-sealing mechanism 32 swings to its lower position, it can clamp the restored bag opening and heat-seal it. The bag opening restoration mechanism includes a first inner bag support unit 37 and a second inner bag support unit 34 arranged opposite to each other. The first inner bag support unit 37 and the second inner bag support unit 34 can move towards or away from each other in the left-right direction. The first inner support plate 371 is symmetrically arranged in front and back. The first inner support plate 371 can move towards or away from each other in the front-back direction. The second inner support bag unit 34 is symmetrically arranged in front and back. The second inner support plate 341 can move towards or away from each other in the front-back direction. Two sets of M-side reset plates 35 are symmetrically arranged in front and back between the first inner support plate 371 and the second inner support plate 341. The M-side reset plates 35 can move towards or away from each other in the front-back direction. The lifting mechanism 2 is prior art, preferably a belt lifting mechanism or a chain lifting mechanism, which will not be described in detail. The two sets of first inner support plates 371 and the two sets of second inner support plates 341 correct the bag opening from inside the bag and fully open it into a square shape, so that the bag opening is kept taut. This ensures that the M-side reset plates 35 can restore the bag opening from the M-side center line of the bag opening inward, and also prevents wrinkles from occurring after the bag opening is restored.

[0031] See Figure 3 In one embodiment, the first inner support plate 371 is a hollow structure with ventilation from top to bottom. The upper exhaust port 373 of the first inner support plate 371 is connected to the air extraction mechanism. The first inner support plate 371 is driven by a lifting cylinder 372 to achieve vertical lifting action. The first inner support plate 371 is preferably made by pressing a round tube, but it can also be made by making a rectangular flat tube, etc. The two sets of liftable first inner support plates 371 have the function of air extraction with ventilation from top to bottom, so that they descend simultaneously during the bag opening restoration process to prepare for air extraction. The simplified integrated design significantly improves the compactness and operational reliability of the equipment.

[0032] Furthermore, the first inner support bag unit 37 also includes a first transverse shift seat 374, which is driven by a first transverse shift cylinder 38 to move horizontally left and right. The cylinder body of the first transverse shift cylinder 38 is hinged to the lifting frame 31. The first inner support plate 371 is driven by a first longitudinal shift cylinder 375 to move horizontally back and forth. The cylinder body of the first longitudinal shift cylinder 375 is hinged to the first transverse shift seat 374. The cylinder rod of the first longitudinal shift cylinder 375 is connected to the cylinder body of the lifting cylinder 372 through a connecting seat 376. The cylinder rod of the lifting cylinder 372 is connected to the first inner support plate 371.

[0033] See Figure 4 In one embodiment, the second inner support bag unit 34 further includes a second transverse shift seat 342, which is driven by a second transverse shift cylinder 36 to move horizontally left and right. The cylinder body of the second transverse shift cylinder 36 is hinged to the lifting frame 31. The second inner support plate 341 is driven by a second longitudinal shift cylinder 343 to move horizontally back and forth. The cylinder body of the second longitudinal shift cylinder 343 is hinged to the second transverse shift seat 342.

[0034] See Figure 2 In one embodiment, the M-side reset plate 35 is driven by a third longitudinal cylinder 33 to move horizontally back and forth, and the cylinder body of the third longitudinal cylinder 33 is hinged to the lifting frame 31.

[0035] See Figure 5 In one embodiment, the swinging heat-sealing mechanism 32 includes two sets of heat-sealing swing frames 321 arranged symmetrically on the left and right. A pressure roller 322 is provided at the free end of each heat-sealing swing frame 321. The heat-sealing swing frame 321 is driven by a drive mechanism to realize the swinging opening and closing action of the pressure roller 322. A heat-sealing component 323 is also provided on the outer side of the pressure roller 322. The heat-sealing component 323 is driven by a heat-sealing cylinder 324 to achieve horizontal movement. The cylinder body of the heat-sealing cylinder 324 is connected to the heat-sealing swing frame 321. The drive mechanism is located at the front and rear ends of the heat-sealing swing frame 321, and it includes a vertically arranged linear cylinder 328. The cylinder body of the linear cylinder 328 is connected to the lifting frame 31, and the cylinder rod of the linear cylinder 328 is connected to the lifting frame 31. The upper end of the vertically arranged rack 327 is hinged, and both ends of the rack 327 mesh with gears 325. The gears 325 are hinged to the lower end of the lifting frame 31 through a connecting shaft 326, which is connected to the end of the heat-sealing swing frame 321. The free end of the heat-sealing swing frame 321 is equipped with a pressure roller 322. After the pressure roller 322 closes, it clamps the first inner support plate 371 and presses down on the bag opening before evacuating air. This can improve the evacuation efficiency and prevent external air from re-entering the bag after evacuation. The lifting and lowering action of the pressure roller 322 flattens the restored bag opening a second time, further ensuring the flatness of the bag opening and preventing wrinkles from appearing at the bag opening after sealing, thus achieving a good heat-sealing effect.

[0036] See Figures 1-9The second objective of this invention is to provide a method for restoring and sealing the opening of square-mouth ton bags, which includes the following steps:

[0037] S1 Bag Opening Reset: After the material is unloaded, the external robotic arm grips the four corners of the bag opening, and the external conveyor transports the bag body to the working position. The lifting frame 31 descends vertically, so that the two sets of first inner support plates 371 and two sets of second inner support plates 341 extend into the bag opening a certain distance. At this time, the two sets of M-side reset plates 35 are located on the outside of the bag opening. The first inner support plate 371 and the second inner support plate 341 move synchronously in opposite directions to open the bag opening into a square shape from the inside. At this time, the two sets of M-side reset plates 35 are located at the center line of the M side of the bag opening. The external robotic arm releases the bag opening, and the M-side reset plates 35 move towards each other and move closer to the center. At the same time, the first inner support plate 371 and the second inner support plate 341 that opened the bag opening move towards each other and move closer to the center. After the bag opening is in place, it is restored to an M shape.

[0038] S2 Bag opening air extraction: During the process of the first inner support plate 371 moving towards the center and returning to its original position, the first inner support plate 371 moves vertically downwards at the same time. The two sets of heat sealing swing frames 321 swing downwards to close the pressure roller 322 and clamp the first inner support plate 371 and press the bag opening. At this time, the lower end of the first inner support plate 371 is located below the pressure roller 322. The air extraction mechanism works to discharge the air in the bag through the first inner support plate 371.

[0039] S3 Heat sealing: After the air extraction is completed, the first inner support plate 371 rises vertically back to its original position. At the same time, the lifting frame 31 rises a certain distance so that the pressure roller 322 rolls upward over the pressed bag opening to flatten the bag opening. At this time, the heat sealing component 323 extends out to clamp the flattened bag opening and then heats it to complete the heat sealing.

Claims

1. A bag opening restoration and vacuum sealing integrated machine suitable for square-mouth ton bags, comprising a frame (1) and a lifting mechanism (2) provided on the frame (1), characterized in that: The lifting mechanism (2) is connected to the restoration heat sealing component (3). The restoration heat sealing component (3) is driven by the lifting mechanism (2) to achieve vertical lifting. The restoration heat sealing component (3) includes a lifting frame (31), a swing heat sealing mechanism (32), and a bag opening restoration mechanism. The lifting frame (31) is connected to the lifting mechanism (2). The bag opening restoration mechanism is provided in the middle of the lifting frame (31). The swing heat sealing mechanism (32) is symmetrically provided on both sides of the bag opening restoration mechanism. When the swing heat sealing mechanism (32) swings to the lower position, it can clamp the restored bag opening and heat seal it. The bag opening restoration mechanism includes a first inner support bag unit (37) and a second inner support bag unit (34) arranged opposite to each other. The inner support bag unit (37) and the second inner support bag unit (34) can move towards each other or away from each other in the left-right direction. The first inner support bag unit (37) includes two sets of first inner support plates (371) arranged symmetrically in front and back. The first inner support plates (371) can move towards each other or away from each other in the front-back direction. The second inner support bag unit (34) includes two sets of second inner support plates (341) arranged symmetrically in front and back. The second inner support plates (341) can move towards each other or away from each other in the front-back direction. Two sets of M-side reset plates (35) arranged symmetrically in front and back are provided between the first inner support plate (371) and the second inner support plate (341). The M-side reset plates (35) can move towards each other or away from each other in the front-back direction.

2. The fully automatic ton bag packing and packaging machine according to claim 1, characterized in that: The first inner support plate (371) is a hollow structure with ventilation at both ends. The exhaust port (373) at the upper end of the first inner support plate (371) is connected to the air extraction mechanism. The first inner support plate (371) is driven by the lifting cylinder (372) to achieve vertical lifting action.

3. The fully automatic ton bag packing and packaging machine according to claim 2, characterized in that: The first inner support bag unit (37) also includes a first transverse shift seat (374), which is driven by a first transverse shift cylinder (38) to move horizontally left and right. The cylinder body of the first transverse shift cylinder (38) is hinged to the lifting frame (31). The first inner support plate (371) is driven by a first longitudinal shift cylinder (375) to move horizontally back and forth. The cylinder body of the first longitudinal shift cylinder (375) is hinged to the first transverse shift seat (374). The cylinder rod of the first longitudinal shift cylinder (375) is connected to the cylinder body of the lifting cylinder (372) through a connecting seat (376). The cylinder rod of the lifting cylinder (372) is connected to the first inner support plate (371).

4. The fully automatic ton bag packing and packaging machine according to claim 1, characterized in that: The second inner support bag unit (34) also includes a second transverse shift seat (342), which is driven by a second transverse shift cylinder (36) to move horizontally left and right. The cylinder body of the second transverse shift cylinder (36) is hinged to the lifting frame (31). The second inner support plate (341) is driven by a second longitudinal shift cylinder (343) to move horizontally back and forth. The cylinder body of the second longitudinal shift cylinder (343) is hinged to the second transverse shift seat (342).

5. The fully automatic ton bag packing and packaging machine according to claim 1, characterized in that: The M-side reset plate (35) is driven by the third longitudinal cylinder (33) to move horizontally back and forth. The cylinder body of the third longitudinal cylinder (33) is hinged to the lifting frame (31).

6. The fully automatic ton bag packing and packaging machine according to claim 1, characterized in that: The swing heat sealing mechanism (32) includes two sets of heat sealing swing frames (321) arranged symmetrically on the left and right. The free end of the heat sealing swing frame (321) is provided with a pressure roller (322). The heat sealing swing frame (321) is driven by a drive mechanism to realize the swing opening and closing action of the pressure roller (322). The outer side of the pressure roller (322) is also provided with a heat sealing component (323). The heat sealing component (323) is driven by a heat sealing cylinder (324) to realize horizontal movement. The cylinder body of the heat sealing cylinder (324) is connected to the heat sealing swing frame (321).

7. The fully automatic ton bag packing and packaging machine according to claim 6, characterized in that: The drive mechanism is located at the front and rear ends of the heat-sealing swing frame (321). It includes a vertically arranged linear cylinder (328). The cylinder body of the linear cylinder (328) is connected to the lifting frame (31). The cylinder rod of the linear cylinder (328) is hinged to the upper end of a vertically arranged rack (327). Both the left and right ends of the rack (327) are meshed with gears (325). The gears (325) are hinged to the lower end of the lifting frame (31) through a connecting shaft (326). The connecting shaft (326) is connected to the end of the heat-sealing swing frame (321).

8. A method for restoring and sealing the opening of a square-mouth ton bag, performed by the integrated bag opening restoration and sealing machine according to any one of claims 1-7, comprising the following steps: S1 Bag opening reset: After the material is unloaded, the external robot grips the four corners of the bag opening and the external conveyor transports the bag body together to move the ton bag (4) to the working position. The lifting frame (31) descends vertically, so that the two sets of first inner support plates (371) and two sets of second inner support plates (341) extend into the bag opening a certain distance. At this time, the two sets of M-side reset plates (35) are located on the outside of the bag opening. The first inner support plate (371) and the second inner support plate (341) move synchronously in opposite directions to open the bag opening into a square shape from the inside. At this time, the two sets of M-side reset plates (35) are located at the M-side center line of the bag opening. The external robot releases the bag opening, and the M-side reset plates (35) move towards each other and move closer to the middle. At the same time, the first inner support plate (371) and the second inner support plate (341) that opened the bag opening move towards each other and move closer to the middle. After the bag opening is in place, it is restored to an M shape.

9. The method for restoring and sealing the opening of a square-mouth ton bag according to claim 8, characterized in that: After the bag opening is reset in S1, the bag opening is evacuated in S2: During the process of the first inner support plate (371) moving towards the middle and returning to its original position, the first inner support plate (371) moves vertically downwards at the same time. The two sets of heat-sealing swing frames (321) swing downwards to close the pressure roller (322) and clamp the first inner support plate (371) and press the bag opening. At this time, the lower end of the first inner support plate (371) is located below the pressure roller (322). The evacuation mechanism works to discharge the air in the bag through the first inner support plate (371). S3 Heat sealing: After the air is extracted, the first inner support plate (371) rises vertically back to its original position. At the same time, the lifting frame (31) rises a certain distance so that the pressure roller (322) rolls upward over the pressed bag opening to flatten the bag opening. At this time, the heat sealing component (323) extends out to clamp the flattened bag opening and then heats it to complete the heat sealing.

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