Air exhaust type packaging machine for powder film bag

Abstract

A powder film bag air exhaust type packaging machine belongs to the field of packaging machinery and comprises a machine frame, a transition hopper arranged above the middle of the machine frame, a bag clamping device arranged at the lower end of the transition hopper, a bag opening mechanism arranged on the lower portion of the bag clamping device, a bag shrinking mechanism arranged on the lower portion of the bag clamping device, and a bag opening blowing and exhausting device arranged in front of the bag clamping device. A transferring swing arm with the left side and the right side moving synchronously is arranged in the middle of the rack, an air exhaust sealing device is arranged in front of the bag opening blowing and exhausting device and can enable an air exhaust pipe to stretch into a film bag to exhaust air before heat sealing, and an inclined conveyor with the front higher than the rear is arranged below the transferring swing arm. A liftable charging vibration plate is arranged on the inclined conveyor corresponding to the bag clamping device, a conveying vibration plate is arranged below a conveying belt of the inclined conveyor corresponding to the bag opening purging exhaust device and the air exhaust sealing device, and the transferring swing arm can clamp and forwards transfer empty bags and full bags. According to the automatic powder packaging machine, high-efficiency automatic packaging of powder with large air content is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a powder film bag air extraction type packaging machine and belongs to the field of packaging machinery. BACKGROUND

[0002] The patent document CN111204479A discloses a powder film bag high-speed packaging machine, which utilizes the pre-extraction of negative pressure in the powder falling channel to reduce the air mixing into the powder during the powder falling process, and cooperates with the vibration of the bag bottom to discharge the air in the bag, and after the full bag is horizontally transferred to the bag opening cleaning position by the transfer swing arm to blow off the dust adhered to the bag opening, the transfer swing arm moves the full bag to the heat sealing mechanism for sealing; although this packaging machine can improve the packaging speed, it is more suitable for packaging the powder with less air content, and if the powder has more air content, it is necessary to cooperate with the packaging film bag with micropores after special treatment to achieve good exhaust effect, but the strength and durability of the film bag will be greatly reduced, and the packaged powder will be damp, which is difficult to achieve ideal packaging effect; in addition, the bag clamping device of the packaging machine has a complex structure, high maintenance and repair cost. SUMMARY

[0003] In order to solve the problems of poor packaging effect and complex structure of the existing powder high-speed packaging machine when packaging materials with high air content, the utility model provides a powder film bag air extraction type packaging machine, which comprises a rack, a transition hopper is arranged above the middle part of the rack, a bag clamping device is arranged at the lower end of the transition hopper, a bag opening mechanism symmetrical in the front-rear direction is arranged at the lower part of the bag clamping device, a bag shrinking mechanism symmetrical in the left-right direction is also arranged at the lower part of the bag clamping device, the bag shrinking mechanism is connected to the rack, a bag opening blowing and exhaust device is arranged in front of the bag clamping device, a transfer swing arm moves synchronously on the left and right sides of the middle part of the rack, an air extraction and sealing device is arranged in front of the bag opening blowing and exhaust device, the air extraction and sealing device can extend the air extraction pipe into the film bag to extract air before heat sealing, the bag opening blowing and exhaust device, the air extraction and sealing device and the transfer swing arm are all connected to the rack, an inclined conveyor with a high front and a low back is arranged below the transfer swing arm, the air extraction and sealing device corresponds to the high position of the inclined conveyor, a loadable vibrating plate is arranged on the inclined conveyor corresponding to the bag clamping device, a conveying vibrating plate is arranged below the conveying belt of the inclined conveyor corresponding to the bag opening blowing and exhaust device and the air extraction and sealing device, and the transfer swing arm can clamp and forwardly transfer the empty bag and the full bag.

[0004] The bag clamping device includes a supporting discharge cylinder, an inner discharge cylinder inside the upper end of the supporting discharge cylinder, a first dust removal pipe that can communicate with the interior of the supporting discharge cylinder on the upper side wall of the supporting discharge cylinder, a first pneumatic damper inside the first dust removal pipe, two sets of second dust removal pipes that are not connected to the interior of the supporting discharge cylinder symmetrically arranged on the lower outer side of the supporting discharge cylinder, a second pneumatic damper inside the second dust removal pipe, a tilting gate mechanism at the lower end of the supporting discharge cylinder, a surrounding plate around the tilting gate mechanism, a dust removal channel formed between the surrounding plate and the tilting gate mechanism, the dust removal channel communicating with the second dust removal pipes, the first pneumatic damper opening and the second pneumatic damper closing when the tilting gate mechanism is closed, the first pneumatic damper closing and the second pneumatic damper opening before the tilting gate mechanism opens and discharges material.

[0005] The flipping gate mechanism includes two sets of arc-shaped flipping gates arranged symmetrically on the left and right. The arc-shaped flipping gates are driven by a flipping cylinder to achieve synchronous opening and closing. When the two sets of arc-shaped flipping gates are closed, their lowest point is higher than the bag opening position of the bag opening mechanism. The inner side of the arc-shaped flipping gate is provided with a partition, and an inner cavity is formed between the arc-shaped flipping gate and the partition. When the arc-shaped flipping gate is opened, the partition is attached to the left and right sides of the lower end of the material drop cylinder. At this time, the inner cavity is connected to the dust removal channel.

[0006] The transition hopper includes a hopper body, and a retractable conical guide cylinder is provided in the middle of the hopper body.

[0007] The bag mouth blowing and exhaust device includes a clamping mechanism, a liftable roller exhaust mechanism is provided above the middle of the clamping mechanism, and a swing blowing mechanism is provided in the middle of the roller exhaust mechanism.

[0008] The air-sealing device includes a heat-sealing mechanism, a bag-opening clamping mechanism below the heat-sealing mechanism, a liftable air-sealing mechanism in the middle of the heat-sealing mechanism, and an air-sealing pipe on the air-sealing mechanism.

[0009] The transfer arm is symmetrically equipped with bag feeding fingers, bag clamping fingers, blowing and venting fingers, and air extraction and sealing fingers from back to front in the left and right directions. Below the bag clamping fingers, there is also a swingable bag pushing plate.

[0010] The bag-shrinking mechanism includes two sets of bag-shrinking swing arms arranged symmetrically in the left and right directions. The lower end of the bag-shrinking swing arms is provided with bag-shrinking fingers. The bag-shrinking swing arms are driven by a bag-shrinking cylinder to realize synchronous swinging motion towards the bag clamping device.

[0011] The beneficial effects of this utility model are:

[0012] A. By utilizing the cooperation between various devices, the entire packaging process of bag clamping, feeding, bag mouth blowing and exhaust, and bag sealing is realized. For powders with high gas content, not only can the air inside the bag be discharged before sealing, but the overall packaging efficiency can also be maximized.

[0013] B. By using the suction sealing device corresponding to the high position of the inclined conveyor, the reduction in bag opening height caused by the bag openings sticking together during the suction process can be compensated. It can also ensure that the bottom of the bag is always in contact with the inclined conveyor, so that the conveyor vibrating plate can vibrate the bottom of the bag continuously during the exhaust process.

[0014] C. When the tilting gate mechanism is closed, the first pneumatic damper is open and the second pneumatic damper is closed, which can remove the residual dust in the channel through the first dust removal pipe before feeding. When the tilting gate mechanism is opened and the material begins to fall, the first pneumatic damper is closed and the second pneumatic damper is open, which can discharge the overflowing dust through the second dust removal pipe during feeding.

[0015] D. By utilizing the inner cavity formed between the two sets of arc-shaped flip doors and partitions, which is connected to the dust removal channel, the dust generated inside the packaging bag opening during material unloading can be directly discharged from the inner cavity through the dust removal channel, reducing the phenomenon of dust overflow.

[0016] E. The use of a simple flip-up gate mechanism in conjunction with a bag opening mechanism and a bag shrinking mechanism can achieve good packaging results while simplifying the structure, reducing equipment maintenance and repair costs, and improving equipment reliability.

[0017] F. The use of a liftable conical guide cylinder inside the hopper can guide and regulate the material flow rate, avoiding the formation of large amounts of dust and material accumulation due to unstable flow rate and large flow during material discharge.

[0018] G. By using a conveyor vibrating plate in conjunction with a bag mouth blowing and exhaust device, air in the blank area of ​​the bag mouth can be discharged in advance during the blowing and cleaning of the bag mouth. Before sealing, the conveyor vibrating plate in conjunction with an air extraction mechanism is inserted into the bag to further discharge the air inside the bag. The repeated exhaust by multiple devices in each process can achieve better exhaust effect and improve the overall exhaust efficiency. Attached Figure Description

[0019] Figure 1 This is the front view of this utility model.

[0020] Figure 2 This is a schematic diagram of the bag clamping device.

[0021] Figure 3 This is a schematic diagram of the tilting gate mechanism.

[0022] Figure 4 This is a schematic diagram of the state when the tilting gate mechanism is closed.

[0023] Figure 5 This is a schematic diagram of the transition hopper.

[0024] Figure 6This is a schematic diagram of an inclined conveyor.

[0025] Figure 7 This is a schematic diagram of the bag mouth blowing and exhaust device.

[0026] Figure 8 This is a schematic diagram of the air extraction and sealing device.

[0027] Figure 9 This is a schematic diagram of the transfer arm.

[0028] Figure 10 This is a schematic diagram of the bag-shrinking mechanism. Detailed Implementation

[0029] 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.

[0030] See Figures 1-10 A powder film bag vacuum packaging machine includes a frame 1. A transition hopper 3 is located at the upper middle part of the frame 1. A bag clamping device 2 is located at the lower end of the transition hopper 3. A bag opening mechanism 9 is symmetrically arranged in a front-to-back direction at the lower part of the bag clamping device 2. A bag shrinking mechanism 8 is also symmetrically arranged in a left-to-right direction at the lower part of the bag clamping device 2. The bag shrinking mechanism 8 is connected to the frame 1. A bag mouth blowing and exhaust device 4 is located in front of the bag clamping device 2. A conveying swing arm 5 with synchronous left and right movements is located in the middle of the frame 1. A vacuum sealing device 6 is located in front of the bag mouth blowing and exhaust device 4. The vacuum sealing device 6 can insert an exhaust pipe into the film bag to extract air before heat sealing. The mouth-blowing and exhaust device 4, the air-sealing device 6, and the transfer arm 5 are all connected to the frame 1. Below the transfer arm 5 is an inclined conveyor 7 with a front-high and rear-low orientation. The air-sealing device 6 is located at the high position of the inclined conveyor 7. The inclined conveyor 7 is equipped with a liftable loading vibration plate 71 corresponding to the bag clamping device 2. Below the conveyor belt 73 of the inclined conveyor 7 is a conveying vibration plate 72 corresponding to the bag mouth-blowing and exhaust device 4 and the air-sealing device 6. The transfer arm 5 can clamp and move empty and full bags forward. The bag opening mechanism 9 is preferably a suction cup bag opening mechanism, in which a bag opening cylinder drives a synchronous connecting rod to achieve the synchronous opening and closing of two sets of symmetrical suction cups.

[0031] Further, the bag clamping device 2 includes a supporting discharge cylinder 22, with an inner discharge cylinder 21 inside the upper end of the supporting discharge cylinder 22. A first dust removal pipe 23, which communicates with the interior of the supporting discharge cylinder 22, is provided on the upper side wall of the supporting discharge cylinder 22. A first pneumatic damper 24 is provided inside the first dust removal pipe 23. Two sets of second dust removal pipes 26, which do not communicate with the interior of the supporting discharge cylinder 22, are symmetrically arranged on the lower outer side of the supporting discharge cylinder 22. A second pneumatic damper 25 is provided inside the second dust removal pipe 26. A tilting gate mechanism 28 is provided at the lower end of the supporting discharge cylinder 22. The periphery of the tilting gate mechanism 28... The surrounding area is equipped with a partition 27, which forms a dust removal channel between the partition 27 and the tilting gate mechanism 28. The dust removal channel is connected to the second dust removal pipe 26. When the tilting gate mechanism 28 is closed, the first pneumatic damper 24 is opened and the second pneumatic damper 25 is closed, which can remove the residual dust in the channel through the first dust removal pipe 23 before feeding. Before the tilting gate mechanism 28 is opened and the material begins to fall, the first pneumatic damper 24 is closed and the second pneumatic damper 25 is opened, which can discharge the overflowing dust through the second dust removal pipe 26 when feeding. The first dust removal pipe 23 and the second dust removal pipe 26 are connected to the dust removal system.

[0032] Furthermore, the flipping gate mechanism 28 includes two sets of arc-shaped flip doors 281 arranged symmetrically on the left and right. The arc-shaped flip doors 281 are driven by a flipping cylinder to achieve synchronous opening and closing. When the two sets of arc-shaped flip doors 281 are closed, their lowest point is higher than the bag opening position of the bag opening mechanism 9. The inner side of the arc-shaped flip door 281 is provided with a partition 282, and an inner cavity is formed between the arc-shaped flip door 281 and the partition 282. When the arc-shaped flip door 281 is opened, the partition 282 is attached to the left and right sides of the lower end of the supporting material drop cylinder 22. At this time, the inner cavity is connected to the dust removal channel.

[0033] Furthermore, the transition hopper 3 includes a hopper body 31, and a liftable conical guide cylinder 32 is provided in the middle of the hopper body 31.

[0034] Furthermore, the bag mouth blowing and exhaust device 4 includes a clamping mechanism 41, a liftable roller exhaust mechanism 42 is provided at the upper center of the clamping mechanism 41, and a swing blowing mechanism 43 is provided at the center of the roller exhaust mechanism 42; preferably, the clamping mechanism 41 is driven by a cylinder to realize the synchronous opening and closing of the clamping plate, the roller exhaust mechanism 42 is provided with a lifting cylinder and a swing cylinder, the swing cylinder drives two sets of rollers to realize the synchronous opening and closing, the swing blowing mechanism 43 is provided with a swing blowing cylinder, the swing blowing cylinder can drive the blowing pipe to swing, and a dust removal hood is provided around the swing range of the blowing pipe, the dust removal hood is connected to the dust removal system.

[0035] Furthermore, the air-sealing device 6 includes a heat-sealing mechanism 62, a bag-opening clamping mechanism 63 is provided below the heat-sealing mechanism 62, and a liftable air-extraction mechanism 61 is provided in the middle of the heat-sealing mechanism. The air-extraction mechanism 61 is provided with an air-extraction pipe. Preferably, the heat-sealing mechanism 62 is driven by a heat-sealing cylinder to realize the synchronous opening and closing of two sets of opposing heat-sealing plates. The bag-opening clamping mechanism 63 is provided with clamping plates on both sides and a bag-opening suction cup in the middle. The clamping cylinder drives the connecting rod to realize the synchronous opening and closing of two sets of opposing clamping plates. The bag-opening suction cup in the middle can open the opening in the middle position when the bag mouth is clamped to allow the air-extraction pipe to be inserted. The air-extraction pipe is connected to the dust removal system.

[0036] Furthermore, the transfer arm 5 is symmetrically provided with a bag feeding finger 52, a bag clamping finger 53, a blowing and exhausting finger 54, and an air extraction and sealing finger 55 from back to front in the left and right directions. Below the bag clamping finger 53, there is also a swingable bag pushing plate 51. Preferably, the bag pushing plate 51 is driven by a bag pushing cylinder to realize the bag pushing action of swinging back and forth.

[0037] Furthermore, the bag-shrinking mechanism 8 includes two sets of bag-shrinking swing arms 82 arranged symmetrically in the left and right directions. The lower end of the bag-shrinking swing arms 82 is provided with bag-shrinking fingers 81. The bag-shrinking swing arms 82 are driven by the bag-shrinking cylinder 83 to realize the synchronous swinging action towards the bag clamping device 2.

[0038] See Figures 1-10 The working principle of this embodiment is explained as follows:

[0039] When the two sets of arc-shaped flip doors 281 are closed, the first pneumatic door 24 opens and the second pneumatic door 25 closes. The dust remaining in the channel is drawn away through the first dust removal pipe 23, and the empty bag is sent to the bag opening mechanism 9 by the bag feeding finger 52 following the transfer arm 5.

[0040] The shrinking fingers 81 grip both sides of the bag opening, the opening mechanism 9 opens the middle of the bag opening, the two sets of arc-shaped flaps 281 open and extend into the bag opening, the shrinking cylinder 83 drives the shrinking fingers 81 to swing inward to shrink the bag opening inward to fit the arc-shaped flaps 281, the first pneumatic door 24 closes and the second pneumatic door 25 opens.

[0041] The material begins to be fed, and the loading vibrating plate 71 is raised to a high position to vibrate the bottom of the bag, so that the air inside the material is discharged and the dust generated inside the bag is discharged from the second dust removal pipe 26 through the inner cavity.

[0042] After all materials are bagged, the two sets of arc-shaped flip doors 281 close, the bag clamping fingers 53 close and grasp the bag opening, and follow the conveying swing arm 5 to move the full bag to the bag opening blowing and exhaust device 4.

[0043] The swing blowing mechanism 43 on the bag mouth blowing and exhaust device 4 blows away the dust adhering to the bag mouth. The roller exhaust mechanism 42 clamps the bag mouth and rolls up and down along the bag mouth to discharge the air in the blank area of ​​the bag mouth. The conveying vibrating plate 72 vibrates the bottom of the bag to discharge the air contained in the material inside the bag again.

[0044] The blow-out and exhaust position finger 54 closes and grasps the bag opening, following the transfer arm 5 to move the full bag to the air extraction and sealing device 6. The bag opening clamping mechanism 63 clamps and opens the middle of the bag opening, and the air extraction pipe descends and extends into the bag to expel the air inside the bag again. At the same time, the conveying vibration plate 72 vibrates the bottom of the bag. After the exhaust is completed, the air extraction mechanism 64 returns to the initial position. Finally, the heat sealing mechanism 62 heat seals the bag opening. The air extraction and sealing position finger 55 closes and grasps the bag opening, following the transfer arm 5 to move the heat-sealed full bag to the next station.

Claims

1. A powder film bag vacuum packaging machine, comprising a frame (1), wherein a transition hopper (3) is provided above the middle of the frame (1), and a bag clamping device (2) is provided at the lower end of the transition hopper (3), characterized in that: The lower part of the bag clamping device (2) is provided with a bag opening mechanism (9) symmetrically arranged in the front-to-back direction. The lower part of the bag clamping device (2) is also provided with a bag shrinking mechanism (8) symmetrically arranged in the left-to-right direction. The bag shrinking mechanism (8) is connected to the frame (1). The front of the bag clamping device (2) is provided with a bag mouth blowing and exhaust device (4). The middle of the frame (1) is provided with a transfer swing arm (5) that moves synchronously on both sides. The front of the bag mouth blowing and exhaust device (4) is provided with a suction sealing device (6). The suction sealing device (6) can insert the suction pipe into the film bag to extract air before heat sealing. The bag mouth blowing and exhaust device (6) 4) The vacuum sealing device (6) and the transfer arm (5) are both connected to the frame (1). The transfer arm (5) is provided with an inclined conveyor (7) that is higher in the front and lower in the back. The vacuum sealing device (6) is located at the high position of the inclined conveyor (7). The inclined conveyor (7) is provided with a lifting and lowering material vibration plate (71) corresponding to the bag clamping device (2). The conveyor belt (73) of the inclined conveyor (7) is provided with a conveying vibration plate (72) corresponding to the bag mouth blowing and exhaust device (4) and the vacuum sealing device (6). The transfer arm (5) can clamp and move empty bags and full bags forward.

2. The powder film bag vacuum packaging machine according to claim 1, characterized in that: The bag clamping device (2) includes a supporting discharge cylinder (22), an inner discharge cylinder (21) is provided inside the upper end of the supporting discharge cylinder (22), a first dust removal pipe (23) that can communicate with the inside of the supporting discharge cylinder (22) is provided on the upper side wall of the supporting discharge cylinder (22), a first pneumatic damper (24) is provided inside the first dust removal pipe (23), and two sets of second dust removal pipes (26) that do not communicate with the inside of the supporting discharge cylinder (22) are symmetrically provided on the lower outer side of the supporting discharge cylinder (22), and a second pneumatic damper (25) is provided inside the second dust removal pipe (26). The lower end of the supporting material drop cylinder (22) is provided with a flipping material gate mechanism (28). The surrounding area of ​​the flipping material gate mechanism (28) is provided with a surrounding plate (27). A dust removal channel is formed between the surrounding plate (27) and the flipping material gate mechanism (28). The dust removal channel is connected to the second dust removal pipe (26). When the flipping material gate mechanism (28) is closed, the first pneumatic damper (24) is opened and the second pneumatic damper (25) is closed. Before the flipping material gate mechanism (28) is opened and the material drop begins, the first pneumatic damper (24) is closed and the second pneumatic damper (25) is opened.

3. The powder film bag vacuum packaging machine according to claim 2, characterized in that: The flipping gate mechanism (28) includes two sets of arc-shaped flip gates (281) arranged symmetrically on the left and right. The arc-shaped flip gates (281) are driven by a flipping cylinder to achieve synchronous opening and closing. When the two sets of arc-shaped flip gates (281) are closed, their lowest point is higher than the bag opening position of the bag opening mechanism (9). The inner side of the arc-shaped flip gate (281) is provided with a partition (282). An inner cavity is formed between the arc-shaped flip gate (281) and the partition (282). When the arc-shaped flip gate (281) is opened, the partition (282) is attached to the left and right sides of the lower end of the supporting drop cylinder (22). At this time, the inner cavity is connected to the dust removal channel.

4. The powder film bag vacuum packaging machine according to claim 1, characterized in that: The transition hopper (3) includes a hopper body (31), and a liftable conical guide cylinder (32) is provided in the middle of the hopper body (31).

5. The powder film bag vacuum packaging machine according to claim 1, characterized in that: The bag mouth blowing and exhaust device (4) includes a clamping mechanism (41), and a liftable roller exhaust mechanism (42) is provided in the middle of the upper part of the clamping mechanism (41). A swing blowing mechanism (43) is provided in the middle of the roller exhaust mechanism (42).

6. The powder film bag vacuum packaging machine according to claim 1 or 5, characterized in that: The air-sealing device (6) includes a heat-sealing mechanism (62), a bag-opening clamping mechanism (63) is provided below the heat-sealing mechanism (62), and an air-sealing mechanism (61) that can be raised and lowered is provided in the middle of the heat-sealing mechanism. An air-sealing pipe is provided on the air-sealing mechanism (61).

7. The powder film bag vacuum packaging machine according to claim 1, characterized in that: The transfer arm (5) is symmetrically provided with a bag feeding finger (52), a bag clamping finger (53), a blowing and venting finger (54), and an air extraction and sealing finger (55) from back to front in the left and right directions. Below the bag-putting finger (53) is also a swingable bag pushing plate (51).

8. The powder film bag vacuum packaging machine according to claim 1, characterized in that: The bag shrinking mechanism (8) includes two sets of bag shrinking swing arms (82) arranged symmetrically in the left and right directions. The lower end of the bag shrinking swing arm (82) is provided with bag shrinking fingers (81). The bag shrinking swing arm (82) is driven by the bag shrinking cylinder (83) to realize the swinging action of synchronously moving towards the bag clamping device (2).

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