Packaging film bending mechanism for bagging packaging machine and bagging packaging machine

Abstract

The utility model belongs to the technical field of vertical bagging packaging machines, and discloses a packaging film bending mechanism for a bagging packaging machine, the packaging film bending mechanism comprises a fixing frame, a first bending unit and a second bending unit, the first bending unit and the second bending unit are connected to the fixing frame, and the first bending unit is located above the second bending unit; a first cavity is formed by the first bending unit and one side of the fixing frame; a second cavity is formed by the second bending unit and one side of the fixing frame; the width of the first cavity is larger than that of the second cavity, and the length of the first cavity is smaller than that of the second cavity; the packaging film is bent into a first U-shaped structure when passing through the first cavity, and is bent into a second U-shaped structure when passing through the second cavity. Meanwhile, the utility model further discloses a bag packaging machine. The packaging film is bent through the first cavity and the second cavity, the width of the first cavity is larger than that of the second cavity, and the length of the first cavity is smaller than that of the second cavity; and the packaging film is finally bent into a flat second U-shaped structure, so that the bagging accuracy is improved, and the packaging yield is improved.

Description

Technical Field

[0001] This application belongs to the technical field of vertical bag packaging machines, specifically a packaging film bending mechanism for a bag packaging machine and a bag packaging machine. Background Technology

[0002] Vertical bag packaging machines are automated packaging equipment widely used in the food, chemical, and pharmaceutical industries, offering advantages such as high efficiency, flexibility, and ease of operation. Designed primarily in a vertical configuration, these machines typically occupy less space, making them suitable for use in production environments with limited capacity. The working process of a vertical bag packaging machine mainly consists of several steps: bag forming, filling, sealing, and cutting.

[0003] In existing vertical bag packaging machines, a sealing mechanism is typically used to simultaneously complete the bending and sealing processes. For example, Chinese patent CN221418823U discloses an automatic packaging machine for powder bags, which includes a packaging machine body. Connecting rods are symmetrically fixedly connected to the top side of the packaging machine body. A feeding hopper is provided at the top of the packaging machine body. A bracket is fixedly connected to the adjacent side of the connecting rod. Consumables are sleeved on the outside of the bracket. A heat seal is fixedly connected to the bottom of the consumables. A rotating component for adjusting the tightness of the consumables is provided on the side of the connecting rod.

[0004] The above technical solution discloses in the accompanying drawings that the packaging film is simultaneously bent and heat-sealed using a heat-sealing method. However, in practice, performing preliminary bending before heat sealing not only ensures the accuracy of bag formation and improves the yield of finished packaging products, but also helps the material fall into the packaging film that has completed the preliminary heat sealing. Utility Model Content

[0005] The purpose of this application is to provide a packaging film bending mechanism for a bag packaging machine. This packaging film bending mechanism uses a first cavity and a second cavity to bend the packaging film, and the width of the first cavity is greater than that of the second cavity, while the length of the first cavity is less than that of the second cavity. This causes the packaging film to bend into a flat second U-shaped structure, improving the accuracy of bag formation. In addition, this application also provides a bag packaging machine with this packaging film bending mechanism, which can improve the packaging yield.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A packaging film bending mechanism for a bag packaging machine includes a fixed frame, a first bending unit and a second bending unit connected to the fixed frame, wherein the first bending unit is located above the second bending unit; the first bending unit and one side of the fixed frame form a first cavity; and the second bending unit and one side of the fixed frame form a second cavity.

[0008] The width of the first cavity is greater than that of the second cavity, and the length of the first cavity is less than that of the second cavity;

[0009] The packaging film is bent into a first U-shaped structure when it passes through the first cavity, and into a second U-shaped structure when it passes through the second cavity.

[0010] Preferably, the first bending unit is a first rod with a U-shaped structure; the second bending unit is a second rod with a U-shaped structure; both ends of the first rod and both ends of the second rod are connected to the fixed frame.

[0011] Preferably, the fixing frame includes a frame body and a connecting plate. The first bending unit and the second bending unit are both connected to the connecting plate. Multiple connecting holes are provided along the height direction of the fixing frame. The connecting plate is connected to the connecting holes by bolts.

[0012] Meanwhile, this application also provides a bag packaging machine, including a frame, a feeding unit for conveying materials, a film feeding unit for conveying packaging film, a packaging film bending mechanism as described above, a heat sealing unit for heat sealing the bent packaging film, and a cutting unit for cutting the heat-sealed packaging film.

[0013] The film feeding unit is located at the top of the frame, the heat sealing unit and the cutting unit are located on one side of the frame, the cutting unit is located below the heat sealing unit, the packaging film bending mechanism is connected to the top of the heat sealing unit, and the feeding unit is located between the packaging film bending mechanism and the heat sealing unit.

[0014] Preferably, the feeding unit is a feeding pipe, which is connected to the bottom of the fixed frame and located below the second bending unit. The feeding pipe is connected to an external feeding device.

[0015] Preferably, the heat sealing unit includes a first heat sealing module and a second heat sealing module, the fixing frame is connected to the first heat sealing module, and the second heat sealing module is located between the first heat sealing module and the cutting unit;

[0016] The first heat-sealing module is used to heat-seal the open and closed ends of the packaging film of the second U-shaped structure;

[0017] The second heat-sealing module is used to perform lateral heat sealing on the packaging film that has passed through the first heat-sealing module to form bagged materials.

[0018] Preferably, the first heat sealing module includes a symmetrically arranged first support frame and a first rotating roller rotatably connected within the first support frame. The first rotating roller is symmetrically arranged along the length direction of the first support frame. The first rotating roller is provided with a symmetrically arranged first hot pressing part. The frame is provided with a first heating unit for heating the first hot pressing part. The frame is also provided with a first driving unit for driving the first rotating roller to move in opposite directions.

[0019] Preferably, the second heat-sealing module includes a symmetrically arranged second support frame and a second rotating roller rotatably connected within the second support frame. The second rotating roller is symmetrically arranged along the length direction of the second support frame. A second hot-pressing part is arranged in a circumferential array on the side of the second rotating roller. A second heating unit for heating the second hot-pressing part is provided on the frame. A second driving unit for driving the second rotating roller to move in opposite directions is also provided inside the frame.

[0020] Preferably, the frame is also provided with a guide plate, which is located below the cutting unit.

[0021] Compared with the prior art, the beneficial effects of this application are:

[0022] This application uses a first cavity and a second cavity to bend the packaging film, with the width of the first cavity being greater than that of the second cavity and the length of the first cavity being less than that of the second cavity; this causes the packaging film to bend into a flat second U-shaped structure, improving the accuracy of bag making and increasing the packaging yield. Attached Figure Description

[0023] Figure 1 This is one of the perspective views of the packaging film bending mechanism in Example 1;

[0024] Figure 2 This is a second perspective view of the packaging film bending mechanism of Example 1;

[0025] Figure 3 This is a top view of the packaging film bending mechanism of Example 1;

[0026] Figure 4 This is a perspective view of the bag packaging machine of Example 2;

[0027] Figure 5 This is a front view of the bag packaging machine of Example 2;

[0028] Figure 6 This is a schematic diagram of the bag packaging machine in Example 2;

[0029] The labels for each item are as follows:

[0030] Fixed frame 1; First bending unit 2; Second bending unit 3; Frame 4; Feeding unit 5; Film feeding unit 6; Heat sealing unit 7; Cutting unit 8; Guide plate 9; Frame body 11; Connecting plate 12; First cavity 21; Second cavity 31; First heating unit 41; First driving unit 42; Second heating unit 43; Second driving unit 44; Feeding pipe 51; First heat sealing module 71; Second heat sealing module 72; Connecting hole 111; First support frame 711; First rotating roller 712; Second support frame 721; Second rotating roller 722; First hot pressing part 7121; Second hot pressing part 7221. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] Example 1

[0033] refer to Figures 1-3 A packaging film bending mechanism for a bag packaging machine includes a fixed frame 1, a first bending unit 2 and a second bending unit 3 connected to the fixed frame 1, wherein the first bending unit 2 is located above the second bending unit 3; the first bending unit 2 and one side of the fixed frame 1 form a first cavity 21; and the second bending unit 3 and one side of the fixed frame 1 form a second cavity 31.

[0034] The width of the first cavity 21 is greater than that of the second cavity 31, and the length of the first cavity 21 is less than that of the second cavity 31;

[0035] When the packaging film passes through the first cavity 21, it is bent into a first U-shaped structure, and when it passes through the second cavity 31, it is bent into a second U-shaped structure.

[0036] In this design, the packaging film is conveyed to the first bending unit 2 via the external film feeding unit 6. The operator first adjusts the position of the packaging film so that it is located in the first cavity 21, specifically, the two sides of the packaging film are in contact with the fixing frame 1, and the surface of the packaging film is in contact with the first bending unit 2, so that the packaging film is bent into a first U-shaped structure. Then, the packaging film coming out of the first cavity 21 passes through the second cavity 31. Since the width of the second cavity 31 is smaller than that of the first cavity 21, and the length of the second cavity 31 is longer than that of the first cavity 21, the second cavity 31 will be closer to the final bag-shaped structure. With the same principle and function as the first cavity 21, the packaging film will form a flatter and longer second U-shaped structure after passing through the second cavity 31. Finally, it is further heat-sealed and shaped by the external heat-sealing unit 7, which improves the accuracy of bag formation and increases the packaging yield.

[0037] In this embodiment, the first bending unit 2 is a first rod with a U-shaped structure; the second bending unit is a second rod with a U-shaped structure; both ends of the first rod and both ends of the second rod are connected to the fixing frame 1.

[0038] Specifically, it can be understood that after the packaging film passes through the first cavity 21, it matches the shape of the first rod, and after passing through the second rod, it matches the shape of the second rod.

[0039] Furthermore, the fixing frame 1 includes a frame body 11 and a connecting plate 12. The first bending unit 2 and the second bending unit 3 are both connected to the connecting plate 12. Multiple connecting holes 111 are provided along the height direction of the fixing frame 1. The connecting plate 12 is connected to the connecting holes 111 by bolts.

[0040] In actual use, loading needs to be carried out after bending. Therefore, the external conveying unit is connected to the bottom of the connecting plate 12. By setting multiple connecting holes 111 in the height direction of the fixed frame 1, the height of the connecting plate 12 can be adjusted to accommodate conveying units of different diameters.

[0041] Example 2

[0042] refer to Figures 4-6 A bag packaging machine includes a frame 4, on which a feeding unit 5 for conveying materials, a film feeding unit 6 for conveying packaging film, a packaging film bending mechanism as in Example 1, a heat sealing unit 7 for heat sealing the bent packaging film, and a cutting unit 8 for cutting the heat-sealed packaging film.

[0043] The film feeding unit 6 is located at the top of the frame 4, the heat sealing unit 7 and the cutting unit 8 are located on one side of the frame 4, the cutting unit 8 is located below the heat sealing unit 7, the packaging film bending mechanism is connected to the top of the heat sealing unit 7, and the feeding unit 5 is located between the packaging film bending mechanism and the heat sealing unit 7.

[0044] In this design, the film feeding unit 6 conveys the packaging film to the bending mechanism of Example 1 for two bending. Then, through the cooperation of the feeding unit 5 and the heat sealing unit 7, the heat sealing unit 7 first performs preliminary heat sealing on the bent packaging film. Then, the feeding unit 5 conveys the material into the packaging film, and the heat sealing unit 7 performs heat sealing on the packaging film again. This heat sealing is a complete seal. Finally, the cutting unit 8 cuts out bags of material.

[0045] Furthermore, the feeding unit 5 is a feeding pipe 51, which is connected to the bottom of the fixed frame 1 and located below the second bending unit 3. The feeding pipe 51 is connected to the external feeding equipment.

[0046] As mentioned in Embodiment 1, the feeding tube 51 is connected to the bottom of the connecting plate 12. By providing multiple connecting holes 111 in the height direction of the fixing frame 1, the height of the connecting plate 12 can be adjusted to accommodate feeding tubes 51 of different diameters. As for the cutting unit 8, it is a conventional design in the art, so it will not be described in detail in this embodiment.

[0047] Preferably, the heat sealing unit 7 includes a first heat sealing module 71 and a second heat sealing module 72, the fixing frame 1 is connected to the first heat sealing module 71, and the second heat sealing module 72 is located between the first heat sealing module 71 and the cutting unit 8;

[0048] The first heat-sealing module 71 is used to heat-seal the open end and the closed end of the packaging film of the second U-shaped structure; the second heat-sealing module 72 is used to perform transverse heat-sealing on the packaging film passed through the first heat-sealing module 71 to form bagged materials.

[0049] Specifically, the first heat-sealing module 71 first performs preliminary heat sealing on the open and closed ends of the packaging film. Then, the second heat-sealing module 72 performs a second horizontal heat sealing on the pre-heat-sealed packaging film. At this time, the packaging film can be regarded as a bag with an open top. The material is then conveyed into the packaging film by the feeding pipe 51. Finally, the second heat-sealing module 72 performs a second horizontal heat sealing to complete the material packaging.

[0050] Furthermore, the first heat sealing module 71 includes a symmetrically arranged first support frame 711 and a first rotating roller 712 rotatably connected within the first support frame 711. The first rotating roller 712 is symmetrically arranged along the length direction of the first support frame 711. The first rotating roller 712 is provided with a symmetrically arranged first hot pressing part 7121. The frame 4 is provided with a first heating unit 41 for heating the first hot pressing part 7121. The frame 4 is also provided with a first driving unit 42 for driving the first rotating roller 712 to move in opposite directions.

[0051] It should be noted that the first drive unit 42 can be a motor, while the opposing movement of the first rollers 712 can be achieved through gear transmission. In actual use, the rotation of the first rollers 712 causes the first hot-pressing part 7121 to press tightly against the packaging film, heat-sealing the open and closed ends of the second U-shaped packaging film, and driving the packaging film downwards. Regarding the first heating unit 41, the first rollers 712 can have a hollow structure, and the first heating unit 41 can use a hot oil supply method, meaning the hot oil pipe is arranged inside the first rollers 712 and does not rotate with them.

[0052] Furthermore, the second heat-sealing module 72 includes a symmetrically arranged second support frame 721 and a second rotating roller 722 rotatably connected within the second support frame 721. The second rotating roller 722 is symmetrically arranged along the length direction of the second support frame 721. The side of the second rotating roller 722 is provided with a second hot-pressing part 7221 arranged in a circumferential array. The frame 4 is provided with a second heating unit 43 for heating the second hot-pressing part 7221. The frame 4 is also provided with a second driving unit 44 for driving the second rotating roller 722 to move in opposite directions.

[0053] The heating principle and driving method of the second heat-sealing module 72 are almost the same. The difference is that the second heat-pressing part 7221 is arranged in a circumferential array, that is, the second heat-pressing part 7221 is arranged laterally. The second rotating roller 722 performs lateral heat sealing on the packaging film through the second heat-pressing part 7221. Specifically, because the second heat-pressing part 7221 is arranged at intervals, under the rotation of the second rotating roller 722, one of the second heat-pressing parts 7221 first contacts the packaging film, heat-seales the packaging film, and drives the packaging film downward. Under the continuous rotation of the second rotating roller 722, the second heat-pressing part 7221 separates from the packaging film. At this time, it is the material dropping stage. The feeding pipe 51 conveys the material into the packaging film. Then, the adjacent second heat-pressing part 7221 rotates into place and performs a second heat sealing, and so on.

[0054] Preferably, the frame 4 is further provided with a guide plate 9, which is located below the cutting unit 8. Specifically, the guide plate 9 is used to guide the direction of material discharge.

[0055] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A packaging film bending mechanism for a bag packaging machine, characterized in that, It includes a fixed frame, a first bending unit connected to the fixed frame, and a second bending unit, wherein the first bending unit is located above the second bending unit; the first bending unit and one side of the fixed frame form a first cavity; and the second bending unit and one side of the fixed frame form a second cavity. The width of the first cavity is greater than that of the second cavity, and the length of the first cavity is less than that of the second cavity; The packaging film is bent into a first U-shaped structure when it passes through the first cavity, and into a second U-shaped structure when it passes through the second cavity.

2. The packaging film bending mechanism according to claim 1, characterized in that, The first bending unit is a first rod with a U-shaped structure; the second bending unit is a second rod with a U-shaped structure; both ends of the first rod and both ends of the second rod are connected to a fixed frame.

3. The packaging film bending mechanism according to claim 1, characterized in that, The fixing frame includes a frame body and a connecting plate. The first bending unit and the second bending unit are both connected to the connecting plate. Multiple connecting holes are provided along the height direction of the fixing frame. The connecting plate is connected to the connecting holes by bolts.

4. A bag packaging machine, characterized in that, The device includes a frame, on which are provided a feeding unit for conveying materials, a film feeding unit for conveying packaging film, a packaging film bending mechanism as described in any one of claims 1 to 3, a heat sealing unit for heat sealing the bent packaging film, and a cutting unit for cutting the heat-sealed packaging film. The film feeding unit is located at the top of the frame, the heat sealing unit and the cutting unit are located on one side of the frame, the cutting unit is located below the heat sealing unit, the packaging film bending mechanism is connected to the top of the heat sealing unit, and the feeding unit is located between the packaging film bending mechanism and the heat sealing unit.

5. The bag packaging machine according to claim 4, characterized in that, The feeding unit is a feeding pipe, which is connected to the bottom of the fixed frame and located below the second bending unit. The feeding pipe is connected to an external feeding device.

6. The bag packaging machine according to claim 4, characterized in that, The heat sealing unit includes a first heat sealing module and a second heat sealing module. The fixing frame is connected to the first heat sealing module, and the second heat sealing module is located between the first heat sealing module and the cutting unit. The first heat-sealing module is used to heat-seal the open end and the closed end of the packaging film of the second U-shaped structure; the second heat-sealing module is used to perform transverse heat-sealing on the packaging film passed through the first heat-sealing module to form bagged materials.

7. The bag packaging machine according to claim 6, characterized in that, The first heat sealing module includes a symmetrically arranged first support frame and a first rotating roller rotatably connected within the first support frame. The first rotating roller is symmetrically arranged along the length direction of the first support frame. The first rotating roller is provided with a symmetrically arranged first hot pressing part. The frame is provided with a first heating unit for heating the first hot pressing part. The frame is also provided with a first driving unit for driving the first rotating roller to move in opposite directions.

8. The bag packaging machine according to claim 6, characterized in that, The second heat sealing module includes a symmetrically arranged second support frame and a second rotating roller rotatably connected within the second support frame. The second rotating roller is symmetrically arranged along the length of the second support frame. A second hot pressing part is arranged in a circumferential array on the side of the second rotating roller. A second heating unit for heating the second hot pressing part is provided on the frame. A second driving unit for driving the second rotating roller to move in opposite directions is also provided inside the frame.

9. The bag packaging machine according to claim 4, characterized in that, The frame is also equipped with a guide plate, which is located below the cutting unit.

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