Automatic exhaust and notching machine for packing drum liner film bag

Abstract

The utility model provides an automatic exhaust and binding machine for packing barrel inner lining film bag, which comprises a frame, a barrel conveyor arranged in front-rear direction is arranged in the lower part of the frame, a gather bag mouth mechanism, a straighten bag mouth mechanism and a twist bag mouth mechanism are sequentially arranged from bottom to top above the middle part of the barrel conveyor, a bind bag mouth mechanism is arranged above the front part of the barrel conveyor, a lower closing mouth fork plate is arranged on the gather bag mouth mechanism, the lower closing mouth fork plate can gather the bag mouth of the inner lining film bag when being close to the upper part of the barrel mouth, the straighten bag mouth mechanism comprises a straighten bag lifting frame, two groups of suction bag mechanisms horizontally moving forward and backward are arranged on the straighten bag lifting frame, an upper closing mouth fork plate movably arranged below the suction bag mechanism, the upper closing mouth fork plate can gather the bag mouth of the inner lining film bag above the lower closing mouth fork plate, and the upper closing mouth fork plate gathers the bag mouth after the upper closing mouth fork plate is lifted with the straighten bag lifting frame and discharges the air in the bag. The utility model can discharge the air in the bag before binding and isolate the air after binding, so as to avoid the contact between the material in the bag and the air, the moisture absorption of the material and the reduction of the quality of the material.

Description

Technical Field

[0001] This utility model relates to an automatic air-venting and sealing machine for the inner lining film bag of a packaging barrel, belonging to the field of packaging machinery. Background Technology

[0002] Patent document CN115817929A discloses an automatic sealing machine. It utilizes a film suction mechanism to lift the opening of a cylindrical inner film bag upwards, where a closing mechanism gathers the opening. A six-finger pneumatic gripper then twists the opening into a braid shape. A bag-clamping mechanism then transfers the twisted opening to a sealing station, where a strapping machine seals it. For packaging some powders and granules, after filling the drum, the bag needs to be vented before sealing; otherwise, the material will absorb moisture, affecting quality. If air is not vented before sealing, the bag will bulge, making it difficult to seal the drum smoothly. Furthermore, if the bag is directly sealed after being twisted, air will still enter the inner bag through the seal, easily causing the material inside to absorb moisture. Utility Model Content

[0003] To address the problem that existing automatic sealing machines for powdered materials cannot pre-vent air from the bags after packaging, thus affecting material quality and the capping process, this invention proposes an automatic air-venting and sealing machine for the inner lining bag of a packaging drum. It includes a frame, with a drum conveyor arranged in a front-to-back direction at the lower part of the frame. The drum conveyor positions and transports the packaging drums, into which the inner lining bag is inserted with the bag opening facing upwards and folded over the outside of the drum. The upper middle part of the drum conveyor is equipped with a bag-gathering mechanism, a bag-straightening mechanism, and a bag-twisting mechanism arranged sequentially from bottom to top. The upper front part of the drum conveyor has a horizontally swingable bag-sealing mechanism. The bag-gathering mechanism has a lower closing fork plate that can move relative to the drum opening. When the lower closing fork plate is close to the top of the packaging drum opening, it can close the opening of the inner lining bag. The vertical center line of the closing fork plate after it is closed coincides with the vertical center line of the packaging barrel. The bag-strapping mechanism includes a lifting bag-strapping lifting frame. The bag-strapping lifting frame is symmetrically equipped with two sets of suction mechanisms that can move horizontally back and forth. The suction mechanism can suck up the bag opening of the inner lining film bag outside the packaging barrel and lift the bag opening as the bag-strapping lifting frame rises. Below the suction mechanism is an upper closing fork plate that can move relative to it. The upper closing fork plate can close the bag opening of the inner lining film bag above the lower closing fork plate. After closing, the vertical center lines of the upper closing fork plate and the lower closing fork plate coincide. After the bag opening is closed, the upper closing fork plate rises with the bag-strapping lifting frame to expel the air inside the bag. The bag-tightening mechanism can tighten the bag opening after the air is expelled. When the bag-tying mechanism swings horizontally to the lower position, it is below the bag-tightening mechanism and tightens the bag opening.

[0004] Two sets of interlocking middle swing forks are symmetrically arranged below the upper closing fork plate. The middle swing forks are driven by the swing closing cylinder to realize the synchronous closing action towards the inner lining film bag. The cylinder body of the swing closing cylinder is connected to the bag lifting frame, which is located on the right side of the machine frame.

[0005] The bag-gathering mechanism includes a bag-gathering mounting frame connected to the left side of the machine frame. A vertically arranged guide mechanism is provided between the upper and lower crossbeams of the bag-gathering mounting frame. A bag-gathering lifting frame is provided on the guide mechanism. The upper end of the bag-gathering lifting frame is connected to the cylinder rod of the bag-gathering lifting cylinder. The cylinder body of the bag-gathering lifting cylinder is connected to the machine frame. The bag-gathering lifting cylinder drives the bag-gathering lifting frame to move vertically up and down. The lower part of the bag-gathering lifting frame is provided with a lower closing fork plate that can move horizontally in opposite directions.

[0006] The upper part of the bag-gathering lifting frame is provided with a folding bag opening mechanism. The folding bag opening mechanism includes a cylinder mounting frame, on which a horizontal moving cylinder is provided. The cylinder rod end of the horizontal moving cylinder is connected to the upper end of the horizontal rotating cylinder. The lower rotating end of the horizontal rotating cylinder is connected to the side-standing rotating cylinder. The rotating end of the side-standing rotating cylinder is provided with a stop bar. The upper end of the stop bar is provided with a pneumatic gripper. The swing end of the pneumatic gripper is provided with a swing arm.

[0007] The bag-twisting mechanism includes a liftable bag-twisting lifting frame, which is located on the right side of the machine frame. A vertically arranged rotating shaft is mounted on the lifting frame. A movable pressure plate is located at the lower part of the rotating shaft. Multiple sets of grippers are evenly arranged circumferentially at the lower end of the rotating shaft. A pressure plate is located at the lower end of each gripper. The upper end of the grippers is hinged to the lower end of a connecting rod, and the upper end of the connecting rod is hinged to the lower end of the movable pressure plate. The upper end of the movable pressure plate is connected to the cylinder rod of a gripper opening / closing cylinder. The cylinder body of the gripper opening / closing cylinder is connected to the bag-twisting lifting frame. The gripper opening / closing cylinder drives the movable pressure plate to descend vertically, causing the grippers and pressure plate to converge towards the center synchronously. When the pressure plate converges, its lower end forms a circular horizontal surface. The rotating shaft is driven by a bag-twisting motor, which is mounted on the bag-twisting lifting frame.

[0008] The beneficial effects of this utility model are:

[0009] A. By using the lower closing fork plate close to the top of the packaging drum to close the opening of the inner lining film bag, the air above the material surface of the inner lining film bag can be squeezed out of the packaging drum. In conjunction with the upper closing fork plate closing the opening of the inner lining film bag above the lower closing fork plate, and with the rise of the bag lifting frame, the air is discharged from the bag opening. This can prevent the material inside the bag from absorbing moisture from the air after sealing, thus reducing the quality of the material. It can also prevent the bag from bulging, and provide a guarantee for the smooth capping of the packaging drum later.

[0010] B. The two sets of middle swing forks located below the upper closing fork plate can swing and close the bag opening. This allows the bag opening, which has already been pulled upwards by the upper closing fork plate, to be closed again by the middle swing forks and then raised together with the upper closing fork plate for a second bag pulling. This further improves the air venting effect of the bag opening and enhances the reliability of the equipment.

[0011] C. The folding bag opening mechanism can flip the twisted bag opening downwards, allowing the bag sealing mechanism to tightly seal the folded opening. This prevents air from re-entering the inner bag through the seal, thus isolating the material inside the bag from the outside air and further improving the reliability of the equipment.

[0012] D. The bag-tightening mechanism has the functions of tightening the bag opening and pressing the bag opening that is exposed outside the packaging barrel after being tied into the packaging barrel. Its structure is simple and compact, which can ensure the functionality of the equipment while taking up less space.

[0013] E. By utilizing the coordinated operation of various mechanisms on the automatic air-venting and sealing machine, the machine can integrate the functions of lifting, closing, air-venting, tightening, folding, sealing, and pressing the bag opening of the inner lining film bag of the packaging barrel. It has a high degree of automation and improves the production efficiency of packaging. The automatic air-venting and sealing machine can also be used for two automatic air-venting and sealing functions when the packaging barrel is fitted with two sets of inner lining film bags, making the application range of the equipment wider. Attached Figure Description

[0014] Figure 1 This is a three-dimensional isometric view of this utility model.

[0015] Figure 2 This is a schematic diagram of the bag-straightening mechanism.

[0016] Figure 3 yes Figure 2 A structural diagram showing the closing process.

[0017] Figure 4 This is a schematic diagram of the bag-closing mechanism.

[0018] Figure 5 This is a schematic diagram of the folding bag opening mechanism.

[0019] Figure 6 This is a schematic diagram of the bag-twisting mechanism.

[0020] Figure 7 yes Figure 6 A schematic diagram of the structure when it is folded up.

[0021] Figure 8 This is a schematic diagram showing the state of the inner lining bag during the air release process.

[0022] Figure 9This is a schematic diagram showing the folding bag opening mechanism preparing to clamp the opening of the inner lining bag.

[0023] Figure 10 This is a schematic diagram showing the state of the folding bag opening mechanism flipping and folding the inner lining bag opening. Detailed Implementation

[0024] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the embodiments of this utility model are described in detail below with reference to the accompanying drawings. The embodiments are exemplary and intended to explain this utility model, but should not be construed as limiting this utility model.

[0025] See Figures 1 to 7 An automatic air-venting and sealing machine for inner lining bags of packaging barrels includes a frame 1. A barrel conveyor 2, arranged in a front-to-back direction, is located in the lower part of the frame 1. The barrel conveyor 2 positions and conveys the packaging barrels. An inner lining bag A is inserted into the packaging barrel with its opening facing upwards and folded over the outside of the packaging barrel. From bottom to top, a bag-gathering mechanism 6, a bag-straightening mechanism 3, and a bag-twisting mechanism 4 are sequentially arranged above the middle of the barrel conveyor 2. A horizontally swinging bag-sealing mechanism 5 is located above the front of the barrel conveyor 2. The bag-gathering mechanism 6 has a lower closing fork 66 that can move relative to the opening of the packaging barrel. When the lower closing fork 66 is close to the opening of the packaging barrel, it can close the opening of the inner lining bag A. The vertical center line of the lower closing fork 66 after closing coincides with the vertical center line of the packaging barrel. The bag-straightening mechanism 3... The system includes a height-adjustable bag-lifting frame 31, on which two sets of bag-suction mechanisms 32 are symmetrically arranged and can move horizontally back and forth. The bag-suction mechanism 32 can suck up the bag opening of the inner lining film bag A outside the packaging barrel and lift the bag opening as the bag-lifting frame 31 rises. Below the bag-suction mechanism 32, there is an upper closing fork plate 33 that can move relative to each other. The upper closing fork plate 33 can close the bag opening of the inner lining film bag A above the lower closing fork plate 66. After closing, the vertical center line of the upper closing fork plate 33 and the lower closing fork plate 66 coincide. After the bag opening is closed, the upper closing fork plate 33 rises with the bag-lifting frame 31 to expel the air in the bag. The bag-tightening mechanism 4 can tighten the bag opening after the air is expelled. When the bag-tying mechanism 5 swings horizontally to the lower position, it is below the bag-tightening mechanism 4 and ties the bag opening.

[0026] Furthermore, the forks on the lower closing fork plate 66 are driven by a horizontal cylinder to move forward and backward in opposite directions, the forks on the upper closing fork plate 33 are driven by a horizontal cylinder to move forward and backward in opposite directions, and the bag lifting frame 31 is driven by a lifting mechanism to achieve lifting action.

[0027] Furthermore, two sets of interlocking middle swing forks 34 are symmetrically arranged below the upper closing fork plate 33. The middle swing fork plate 34 is driven by the swing closing cylinder 35 to realize the synchronous closing action towards the inner lining film bag A. The cylinder body of the swing closing cylinder 35 is connected to the bag lifting frame 31, which is located on the right side of the frame 1.

[0028] Furthermore, the bag-gathering mechanism 6 includes a bag-gathering mounting frame 61, which is connected to the left side of the frame 1. A vertically arranged guide mechanism 62 is provided between the upper and lower crossbeams of the bag-gathering mounting frame 61. A bag-gathering lifting frame 64 is provided on the guide mechanism 62. The upper end of the bag-gathering lifting frame 64 is connected to the cylinder rod of the bag-gathering lifting cylinder 63. The cylinder body of the bag-gathering lifting cylinder 63 is connected to the frame 1. The bag-gathering lifting cylinder 63 drives the bag-gathering lifting frame 64 to rise and fall vertically. The lower part of the bag-gathering lifting frame 64 is provided with a lower closing fork plate 66 that can move horizontally in opposite directions.

[0029] Furthermore, the upper part of the bag-gathering lifting frame 64 is provided with a folding bag opening mechanism 65. The folding bag opening mechanism 65 includes a cylinder mounting frame 651. A horizontal moving cylinder 652 is provided on the cylinder mounting frame 651. The cylinder rod end of the horizontal moving cylinder 652 is connected to the upper end of the horizontal rotating cylinder 653. The lower rotating end of the horizontal rotating cylinder 653 is connected to the side-standing rotating cylinder 656. The rotating end of the side-standing rotating cylinder 656 is provided with a stop bar 657. The upper end of the stop bar 657 is provided with a pneumatic gripper 654. The swing end of the pneumatic gripper 654 is provided with a swing rod 655.

[0030] Furthermore, the bag-twisting mechanism 4 includes a liftable bag-twisting lifting frame 41, which is located on the right side of the frame 1. A vertically arranged rotating shaft 43 is mounted on the lifting frame 41. A movable pressure plate 45 is located at the lower part of the rotating shaft 43. Multiple sets of grippers 47 are evenly arranged circumferentially at the lower end of the rotating shaft 43. A pressure plate 48 is located at the lower end of each gripper 47. The upper end of each gripper 47 is hinged to the lower end of a connecting rod 46. The upper end of the connecting rod 46 is hinged to the lower end of the movable pressure plate 45. The upper end is connected to the cylinder rod of the gripper opening and closing cylinder 44, and the cylinder body of the gripper opening and closing cylinder 44 is connected to the bag twisting lifting frame 41. The gripper opening and closing cylinder 44 drives the movable pressure plate 45 to descend vertically, so that the gripper 47 and the pressure plate 48 can synchronously retract to the center. When the pressure plate 48 retracts, its lower end forms a circular horizontal surface. The rotating shaft 43 is driven by the bag twisting motor 42 to rotate. The bag twisting motor 42 is installed on the bag twisting lifting frame 41, and the bag twisting moving frame 41 is driven by the lifting mechanism to achieve the lifting action.

[0031] See Figures 1-10 The working principle of this embodiment is explained as follows:

[0032] After the inner lining bag A inside the packaging barrel is filled with material, the packaging barrel is conveyed by the barrel conveyor 2 to the center position of the bag opening mechanism 3. The bag lifting cylinder 63 drives the bag lifting frame 64 to descend vertically, so that the lower closing fork plate 66 descends to the low position. The bag lifting frame 31 descends, so that the two sets of bag suction mechanisms 32 move horizontally towards the inner lining bag A at the same time, suck up the folded bag opening of the inner lining bag A outside the barrel, and then rise to lift the bag opening.

[0033] The bag-gathering lifting cylinder 63 drives the bag-gathering lifting frame 64 to rise vertically, causing the lower closing fork plate 66 to rise to the upper position of the packaging barrel opening. The lower closing fork plate 66 moves horizontally towards each other to close the bag opening at the upper position of the packaging barrel, squeezing the air above the inner lining film bag A material surface out of the packaging barrel.

[0034] The bag-straightening lifting frame 31 descends, causing the upper closing fork plate 33 to approach the lower closing fork plate 66. The upper closing fork plate 33 moves horizontally towards each other to continue closing the bag opening. After the bag opening is closed, the bag-straightening lifting frame 31 continues to expel air from the bag opening as it rises. After the upper closing fork plate 33 rises a certain distance, the swing closing cylinder 35 drives the middle swing fork plate 34 to simultaneously close the bag opening inward and clamp the middle position of the bag opening. The bag-straightening lifting frame 31 continues to rise, driving the upper closing fork plate 33 and the middle swing fork plate 34 to rise, so that all the air at the bag opening is expelled.

[0035] The gripper opening and closing cylinder 44 drives the movable pressure plate 45 to descend vertically, causing the gripper 47 to retract towards the center and clamp the upper end of the bag opening. The upper closing fork plate 33, the middle swing fork plate 34, and the lower closing fork plate 66 release the bag opening. The bag opening twisting motor 42 drives the rotating shaft 43 to rotate, causing the bag opening of the inner lining bag A to twist into a spiral shape.

[0036] The horizontal moving cylinder 652 extends, and the horizontal rotating cylinder 653 is started to rotate 90 degrees toward the bag opening, so that the bag opening is between the two open swing rods 655 and the stop rod 657 is against one side of the bag opening.

[0037] The pneumatic gripper 654 drives the swing arm 655 to horizontally close and clamp the bag opening. The gripper opening and closing cylinder 44 drives the movable pressure plate 45 to rise vertically and open the gripper 47. The side-standing rotating cylinder 656 is started to rotate 180 degrees, so that the bag opening clamped at the swing arm 655 flips and folds downward around the center of the stop bar 657.

[0038] The bag-tying mechanism 5 swings horizontally to tighten the bag opening at the flipped fold with its cable tie gun;

[0039] The gripper opening and closing cylinder 44 drives the movable pressure plate 45 to descend vertically again, causing the gripper 47 and the pressure plate 48 to converge towards the center synchronously, forming a circular horizontal surface. The bag-twisting moving frame 41 descends, causing the converged pressure plate 48 to press the bag opening that was exposed outside the packaging barrel after sealing into the material surface inside the packaging barrel. The barrel conveyor 2 is started to transport the sealed packaging barrel to the next capping process.

Claims

1. An automatic air-venting and sealing machine for inner lining film bags of packaging barrels, comprising a frame (1), a barrel conveyor (2) arranged in a front-to-back direction is provided in the lower part of the frame (1), the barrel conveyor (2) positions and conveys the packaging barrels, the packaging barrels are fitted with inner lining film bags (A) with the bag opening facing upwards and folded over the outside of the packaging barrel, characterized in that: The barrel conveyor (2) is provided with a bag-gathering mechanism (6), a bag-straightening mechanism (3), and a bag-twisting mechanism (4) in the middle upper part from bottom to top. The barrel conveyor (2) is provided with a horizontally swingable bag-tying mechanism (5) at the front upper part. The bag-gathering mechanism (6) is provided with a lower closing fork plate (66) that can move relative to the barrel opening. When the lower closing fork plate (66) is close to the top of the barrel opening, it can close the opening of the inner lining film bag (A). The vertical center line of the lower closing fork plate (66) after closing coincides with the vertical center line of the barrel. The bag-straightening mechanism (3) includes a lifting bag-straightening lifting frame (31). The bag-straightening lifting frame (31) is symmetrically provided with two sets of bag suction mechanisms (32) that can move horizontally back and forth. The suction bag mechanism (32) can suck up the bag opening of the inner lining film bag (A) outside the packaging barrel and lift the bag opening with the bag lifting frame (31). The suction bag mechanism (32) is provided with an upper closing fork plate (33) that can move relative to it. The upper closing fork plate (33) can close the bag opening of the inner lining film bag (A) above the lower closing fork plate (66). After closing, the upper closing fork plate (33) and the lower closing fork plate (66) are on the same vertical center line. After closing the bag opening, the upper closing fork plate (33) rises with the bag lifting frame (31) to discharge the air in the bag. The bag tightening mechanism (4) can tighten the bag opening after the air is discharged. When the bag tying mechanism (5) swings horizontally to the lower position, it is below the bag tightening mechanism (4) to tie the bag opening.

2. The automatic air-venting and sealing machine according to claim 1, characterized in that: Two sets of interlocking middle swing forks (34) are symmetrically arranged below the upper closing fork plate (33). The middle swing fork plate (34) is driven by the swing closing cylinder (35) to realize the synchronous closing action towards the inner lining film bag (A). The cylinder body of the swing closing cylinder (35) is connected to the bag lifting frame (31), which is located on the right side of the frame (1).

3. The automatic air-venting and sealing machine according to claim 1, characterized in that: The bag-gathering mechanism (6) includes a bag-gathering mounting frame (61), which is connected to the left side of the frame (1). A vertically arranged guide mechanism (62) is provided between the upper and lower crossbeams of the bag-gathering mounting frame (61). A bag-gathering lifting frame (64) is provided on the guide mechanism (62). The upper end of the bag-gathering lifting frame (64) is connected to the cylinder rod of the bag-gathering lifting cylinder (63). The cylinder body of the bag-gathering lifting cylinder (63) is connected to the frame (1). The bag-gathering lifting cylinder (63) drives the bag-gathering lifting frame (64) to rise and fall vertically. The lower part of the bag-gathering lifting frame (64) is provided with a lower closing fork plate (66) that can move horizontally in opposite directions.

4. The automatic air-venting and sealing machine according to claim 3, characterized in that: The upper part of the bag lifting frame (64) is provided with a folding bag opening mechanism (65). The folding bag opening mechanism (65) includes a cylinder mounting frame (651). A horizontal moving cylinder (652) is provided on the cylinder mounting frame (651). The cylinder rod end of the horizontal moving cylinder (652) is connected to the upper end of the horizontal rotating cylinder (653). The lower rotating end of the horizontal rotating cylinder (653) is connected to the side-standing rotating cylinder (656). The rotating end of the side-standing rotating cylinder (656) is provided with a stop bar (657). The upper end of the stop bar (657) is provided with a pneumatic gripper (654). The swing end of the pneumatic gripper (654) is provided with a swing rod (655).

5. The automatic air-expelling and sealing machine according to claim 1, characterized in that: The bag-twisting mechanism (4) includes a liftable bag-twisting lifting frame (41), which is located on the right side of the frame (1). A vertically arranged rotating shaft (43) is provided on the bag-twisting lifting frame (41). A movable pressure plate (45) is provided at the lower part of the rotating shaft (43). Multiple sets of grippers (47) are evenly arranged in the circumferential direction at the lower end of the rotating shaft (43). A pressure plate (48) is provided at the lower end of the grippers (47). The upper end of the grippers (47) is hinged to the lower end of the connecting rod (46). The upper end of the connecting rod (46) is hinged to the lower end of the movable pressure plate (45). The upper end of the movable pressure plate (45) is connected to the cylinder rod of the gripper opening and closing cylinder (44). The cylinder body of the gripper opening and closing cylinder (44) is connected to the bag-twisting lifting frame (41). The gripper opening and closing cylinder (44) drives the movable pressure plate (45) to descend vertically, so that the gripper (47) and the pressure plate (48) can be synchronously retracted to the center. When the pressure plate (48) is retracted, its lower end forms a circular horizontal surface. The rotating shaft (43) is driven by the bag-twisting motor (42) to rotate. The bag-twisting motor (42) is installed on the bag-twisting lifting frame (41).

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