Pneumatic capper

Abstract

The utility model relates to a sealing machine technical field, concretely is a kind of pneumatic sealing machine.It includes rack, bag mouth flattening device, two clamping heat sealing devices and two auxiliary exhaust devices.Rack is provided with mounting bracket;Auxiliary exhaust device includes servo cylinder one being installed on mounting bracket, sponge mounting plate being connected with the output shaft of servo cylinder one and sponge being installed on sponge mounting plate;Clamping heat sealing device includes servo cylinder three, clamping plate, U-shaped frame and hot press plate;Bag mouth flattening device includes lifting plate, two push rods being slidably installed on lifting plate, power assembly for driving two push rods mutually close or away and servo cylinder two being installed on mounting bracket for driving lifting plate lifting.The utility model is guaranteed that bag mouth is completely opened before heat sealing by the bag mouth flattening device setting, and the fold on sealing line is eliminated;Combined with clamping heat sealing device, it is guaranteed that pressure is uniform in heat sealing process, to form the even sealing line.

Description

Technical Field

[0001] This utility model relates to the field of sealing machine technology, and in particular to a pneumatic sealing machine. Background Technology

[0002] In industrial production, particularly in the food, daily chemical, pharmaceutical, and electronics industries, flexible packaging bags are widely used due to their lightweight, low cost, and ease of storage and transportation. After filling, these bags must be sealed to ensure the hygiene and safety of the contents and extend their shelf life. Traditional sealing methods rely heavily on manual labor, requiring workers to manually smooth the bag opening, remove air, and then use heat-sealing tools. This method is not only inefficient and labor-intensive, but also produces highly inconsistent sealing quality, easily leading to wrinkles, leaks, or incomplete seals due to human error, severely impacting product quality.

[0003] With the development of automation technology, various automatic sealing devices have emerged on the market. However, existing devices often have the following technical defects in terms of functionality: 1. Some devices lack an effective bag opening pretreatment mechanism. For packaging bags that are inherently soft and wrinkle-prone, it is difficult to fully unfold and smooth the bag opening before heat sealing, resulting in wrinkles embedded in the sealing line and forming weak points in the seal; 2. Poor air removal from the bag is also a common problem. If too much air remains in the bag, especially oxygen, it will accelerate the oxidation and deterioration of the contents. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a pneumatic sealing machine.

[0005] The technical solution of this utility model is a pneumatic sealing machine, which includes a frame, a bag mouth smoothing device, two clamping heat sealing devices and two auxiliary exhaust devices.

[0006] The frame is equipped with a mounting bracket; two auxiliary exhaust devices are symmetrically arranged, each including a servo cylinder I mounted on the mounting bracket, a sponge mounting plate connected to the output shaft of the servo cylinder I, and a sponge mounted on the sponge mounting plate; two clamping heat sealing devices are symmetrically arranged above the auxiliary exhaust devices, each including a servo cylinder III, a clamping plate, a U-shaped frame, and a heat pressing plate. The clamping plate has a notch along its length, and the center of the heat pressing plate is located inside the notch. The U-shaped frame is connected to the heat pressing plate, and an elastic connecting component connects the U-shaped frame and the clamping plate. The servo cylinder III is mounted on the mounting bracket, and its output shaft is connected to the U-shaped frame; the bag opening smoothing device includes a lifting plate, two levers slidably mounted on the lifting plate, a power component for driving the two levers to move closer or further apart, and a servo cylinder II mounted on the mounting bracket for driving the lifting plate to move up and down.

[0007] Preferably, it also includes a belt conveyor, with a conveyor mounting hole at the upper end of the frame, and the middle part of the belt conveyor located inside the conveyor mounting hole.

[0008] Preferably, the elastic connection assembly includes a guide rod, a spring, and a limiting block. The guide rod moves through the U-shaped frame and its two ends are connected to the clamping plate and the limiting block, respectively. The spring is sleeved on the guide rod.

[0009] Preferably, the power assembly includes an electric push rod, a gear, and two racks. The lifting plate has two sliding holes for the two levers to slide. Each lever is connected to a sliding frame, which is slidably mounted on the lifting plate. The two racks are mounted on the sliding frames on both sides, and the gear is rotatably mounted on the lifting plate. The gear meshes with both racks. The electric push rod is mounted on the lifting plate, and its output shaft is connected to the sliding frame on one side. An outer cover is provided at the upper end of the lifting plate, and the output shaft of the second servo cylinder is connected to the outer cover.

[0010] Preferably, the length of the clamp is less than the maximum distance between the two levers.

[0011] Preferably, a control panel is installed on the rack, and the control panel adopts a combination of human-machine interface and programmable logic controller.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: 1. The bag opening smoothing device ensures that the bag opening is fully opened and smoothed before heat sealing, effectively eliminating wrinkles on the sealing line; combined with the two-stage working mode of the clamping heat sealing device, namely flexible clamping followed by constant pressure heat sealing, the pressure is uniform during the heat sealing process, thus forming a smooth sealing line and greatly reducing the leakage rate. 2. The auxiliary venting device uses soft and elastic sponge to evenly compress the bag, safely and efficiently expelling most of the air inside. This process effectively reduces the oxygen content inside the packaging, extending the product's shelf life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural diagram showing the connection between the clamping plate and the U-shaped frame in this utility model; Figure 3 This is a schematic diagram of the clamping heat sealing device in this utility model.

[0014] Reference numerals: 1. Frame; 101. Conveyor mounting hole; 2. Mounting bracket; 3. Belt conveyor; 4. Control panel; 5. Sponge mounting plate; 6. Sponge; 7. Outer cover; 8. Servo cylinder one; 9. Servo cylinder two; 10. Servo cylinder three; 11. Clamping plate; 111. Notch; 12. U-shaped frame; 13. Hot press plate; 14. Guide rod; 15. Spring; 16. Limit block; 17. Lifting plate; 171. Sliding hole; 18. Electric push rod; 19. Pulley; 20. Sliding frame; 21. Rack; 22. Gear. Detailed Implementation

[0015] Example 1; as Figures 1-3 As shown in the figure, the pneumatic sealing machine proposed in this embodiment includes a frame 1, a bag mouth smoothing device, two clamping heat sealing devices, and two auxiliary exhaust devices.

[0016] A mounting bracket 2 is provided on the rack 1, and a control panel 4 is installed on the rack 1. The control panel 4 adopts a combination of human-machine interface and programmable logic controller.

[0017] Two auxiliary exhaust devices are symmetrically arranged. The auxiliary exhaust devices include a servo cylinder 8 mounted on the mounting bracket 2, a sponge mounting plate 5 connected to the output shaft of the servo cylinder 8, and a sponge 6 mounted on the sponge mounting plate 5.

[0018] Two clamping heat sealing devices are symmetrically arranged above the auxiliary exhaust device. The clamping heat sealing device includes a servo cylinder 10, a clamping plate 11, a U-shaped frame 12, and a hot press plate 13. The clamping plate 11 has a notch 111 along its length. The middle part of the hot press plate 13 is located inside the notch 111. The U-shaped frame 12 is connected to the hot press plate 13. An elastic connecting component is connected between the U-shaped frame 12 and the clamping plate 11. The elastic connecting component includes a guide rod 14, a spring 15, and a limiting block 16. The guide rod 14 moves through the U-shaped frame 12 and its two ends are connected to the clamping plate 11 and the limiting block 16, respectively. The spring 15 is sleeved on the guide rod 14. The servo cylinder 10 is mounted on the mounting bracket 2 and its output shaft is connected to the U-shaped frame 12.

[0019] The bag opening smoothing device includes a lifting plate 17, two levers 19 slidably mounted on the lifting plate 17, a power component for driving the two levers 19 to move closer or further apart, and a servo cylinder 2 9 mounted on the mounting bracket 2 for driving the lifting plate 17 to rise and fall. The power component includes an electric push rod 18, a gear 22, and two racks 21. The lifting plate 17 has two sliding holes 171 for the two levers 19 to slide. Each lever 19 is connected to a sliding frame 20, which is slidably mounted on the lifting plate 17. The two racks 21 are respectively mounted on the sliding frames 20 on both sides. The gear 22 is rotatably mounted on the lifting plate 17, and the gear 22 is meshed with both racks 21. The electric push rod 18 is mounted on the lifting plate 17 and its output shaft is connected to the sliding frame 20 on one side. The length of the clamping plate 11 is less than the maximum distance between the two levers 19. An outer cover 7 is provided at the upper end of the lifting plate 17, and the output shaft of the servo cylinder 2 9 is connected to the outer cover 7.

[0020] The working principle of this technical solution is as follows: The control panel 4 uses a combination of HMI (Human Machine Interface) and PLC (Programmable Logic Controller). The HMI provides users with an intuitive and user-friendly interface, allowing them to easily issue various commands via touchscreen. The bag opening smoothing device is used to open and smooth the bag opening, ensuring that the bag opening is wrinkle-free, thus facilitating subsequent venting and heat sealing. Servo cylinder 29 is activated, driving the lifting plate 17 downwards, causing the lever 19 to enter the inside of the bag opening. After the electric push rod 18 is activated, it pushes the sliding frame 20 on one side to move, driving the rack 21 to move. Because the gear 22 meshes with the two racks 21, the movement of one rack 21 is converted into the opposite movement of the other rack 21 through the gear 22, thereby making the two levers 19 move away from each other. This action can open the bag opening, thereby eliminating wrinkles and twists. The design of the lever 19 ensures that it is located on both sides of the clamping plate 11 after moving to the limited position, thus avoiding interference with subsequent clamping operations. The bag opening smoothing process not only improves the aesthetics of the seal but also ensures that the bag opening is aligned during heat sealing, reducing the risk of air leakage.

[0021] The auxiliary exhaust device is used to squeeze the bag to expel most of the air inside and reduce the oxygen content inside the bag; the servo cylinder 8 is activated to drive the two sponge mounting plates 5 to move towards the middle, so that the sponge 6 tightly squeezes the two sides of the bag; the sponge 6 is made of soft porous material that can apply pressure evenly without damaging the bag. During the squeezing process, the air inside the bag is forced out, and some residual air may escape through the bag opening.

[0022] The clamping heat-sealing device is used to clamp the bag opening and perform heat-sealing. At the start of operation, the servo cylinder 10 drives the U-shaped frame 12 to move towards the bag opening, so that the clamping plate 11 first contacts the bag opening. Since the clamping plate 11 has a notch 111, the middle part of the heat-pressing plate 13 is located inside the notch 111, so the clamping plate 11 can clamp the bag opening independently. At this time, the elastic connecting component plays a role. The clamping plate 11 stops moving after contacting the bag opening, but the servo cylinder 10 continues to push the U-shaped frame 12, which causes the spring 15 to be compressed, forming a buffer pressure between the clamping plate 11 and the heat-pressing plate 13. Then the heat-pressing plate 13 contacts the bag opening and performs heat sealing. The heat-pressing plate 13 integrates a heating element, which can be an electric heating wire. During the heat sealing process, the lever 19 has moved to both sides of the clamping plate 11 and will not interfere with the heat sealing. After the heat sealing time is over, the servo cylinder 10 resets, so that the clamping plate 11 and the heat-pressing plate 13 are separated from the bag opening.

[0023] Example 2; as Figure 1 As shown, the pneumatic sealing machine proposed in this embodiment, compared with the first embodiment, also includes a belt conveyor 3. The upper end of the frame 1 is provided with a conveyor mounting hole 101, and the middle part of the belt conveyor 3 is located inside the conveyor mounting hole 101.

[0024] In this embodiment, during operation, the belt conveyor 3 automatically transports the bags filled with materials to the designated position, namely between the two auxiliary exhaust devices; the addition of the belt conveyor 3 further automates the material handling. The belt conveyor 3 is installed in the conveyor mounting hole 101 of the frame 1, and it is seamlessly integrated with the main equipment. It not only transports bags in and out of the workstation, but can also connect with upstream and downstream equipment to form a complete packaging line.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A pneumatic sealing machine, characterized in that, Includes a frame (1), a bag opening smoothing device, two clamping heat sealing devices, and two auxiliary exhaust devices; A mounting bracket (2) is provided on the frame (1); two auxiliary exhaust devices are symmetrically arranged, each auxiliary exhaust device including a servo cylinder (8) mounted on the mounting bracket (2), a sponge mounting plate (5) connected to the output shaft of the servo cylinder (8), and a sponge (6) mounted on the sponge mounting plate (5); two clamping heat sealing devices are symmetrically arranged above the auxiliary exhaust devices, each clamping heat sealing device including a servo cylinder (10), a clamping plate (11), a U-shaped frame (12), and a heat pressing plate (13), wherein the clamping plate (11) has a notch (111) along its length direction, and the heat pressing plate The middle part of (13) is located inside the notch (111). The U-shaped frame (12) is connected to the hot press plate (13). An elastic connection component is connected between the U-shaped frame (12) and the clamp plate (11). The servo cylinder three (10) is installed on the mounting bracket (2) and its output shaft is connected to the U-shaped frame (12). The bag mouth smoothing device includes a lifting plate (17), two levers (19) slidably installed on the lifting plate (17), a power component for driving the two levers (19) to move closer or further away from each other, and a servo cylinder two (9) installed on the mounting bracket (2) for driving the lifting plate (17) to rise and fall.

2. A gas-operated capper according to claim 1, characterised in that It also includes a belt conveyor (3), with a conveyor mounting hole (101) at the upper end of the frame (1), and the middle part of the belt conveyor (3) is located inside the conveyor mounting hole (101).

3. A gas-operated capper according to claim 1, wherein The elastic connection assembly includes a guide rod (14), a spring (15) and a limiting block (16). The guide rod (14) moves through the U-shaped frame (12) and its two ends are connected to the clamping plate (11) and the limiting block (16) respectively. The spring (15) is sleeved on the guide rod (14).

4. A pneumatic sealing machine according to claim 1, characterized in that, The power assembly includes an electric push rod (18), a gear (22), and two racks (21). The lifting plate (17) has two sliding holes (171) for sliding two levers (19). Each lever (19) is connected to a sliding frame (20). The sliding frame (20) is slidably mounted on the lifting plate (17). The two racks (21) are mounted on the sliding frames (20) on both sides respectively. The gear (22) is rotatably mounted on the lifting plate (17). The gear (22) is meshed with both racks (21). The electric push rod (18) is mounted on the lifting plate (17) and its output shaft is connected to the sliding frame (20) on one side. The upper end of the lifting plate (17) is provided with an outer cover (7). The output shaft of the servo cylinder (9) is connected to the outer cover (7).

5. A gas-operated capper according to claim 1, wherein The length of the clamp (11) is less than the maximum distance between the two levers (19).

6. A gas-operated capper according to claim 1, wherein A control panel (4) is installed on the rack (1). The control panel (4) is a combination of human-machine interface and programmable logic controller.

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