A bag flattening mechanism and hot cutting device

Abstract

The utility model discloses a kind of bag body flattening mechanism and hot cutting device, bag body flattening mechanism includes flattening structure and drive structure, flattening structure includes multiple flattening pieces arranged along the spacing of perpendicular to feed direction, flattening piece is configured to the feed side of cutting tool structure, and flattening piece is provided with arc transition angle at feed side;Drive structure includes multiple driving pieces connected with each flattening piece respectively, and driving piece is used to provide corresponding flattening piece with the pressure acting on bag body surface.The device can realize accurate self-adaptive leveling to bag body surface, both eliminates bag body surface wrinkle, and effectively avoids the problem of damaging bag body or seal due to pressure concentration.

Description

Technical Field

[0001] This utility model relates to the field of woven bag production technology, specifically to a bag flattening mechanism and a heat cutting device. Background Technology

[0002] On production lines for bagged products in industries such as food, daily chemicals, and pharmaceuticals, after filling and sealing, the surface of the bags often develops wrinkles, bulges, or unevenness due to uneven distribution of internal materials, compression during sealing, or traction during transport. These appearance defects not only affect the product's aesthetics and brand image but also lead to a series of practical problems. Uneven bags are prone to causing misaligned labels, unclear coding, or difficulty in being stably gripped by robotic arms during subsequent processing stages (such as labeling, coding, date coding, and packing), resulting in production interruptions or increased defect rates.

[0003] To address the aforementioned problems, existing devices employ a pressing structure to compress the bag surface, maintaining a flat state during transport. For example, CN119079652B discloses a woven bag heat-cutting machine roll pressing device, which includes a frame, a connecting seat mounted on the top of the frame, an unwinding roller mounted on the connecting seat, and a rotatable pressing roller positioned above the unwinding roller. A pressing assembly is mounted on the pressing roller for adjusting its pressing position. This device uses an adjustable pressing roller to press the rolled woven bag material, aiming to prevent the material from loosening during unwinding and heat cutting.

[0004] However, existing devices use a rigid clamping method, with the pressure rollers making line or surface contact with the material surface, which cannot adapt to local undulations on the bag surface. When there are uneven wrinkles or bulges on the bag surface, this rigid clamping will cause excessive pressure in some areas and insufficient pressure in others, resulting in local deformation or damage to the bag, while making it difficult to completely eliminate wrinkles. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a bag flattening mechanism and a hot cutting device to solve the technical problems of poor bag flattening effect and easy local deformation or damage of the bag in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a bag flattening mechanism, including a flattening structure and a driving structure. The flattening structure includes a plurality of flattening members arranged at intervals along a direction perpendicular to the feeding direction. The flattening members are disposed on the feeding side of the cutting structure, and the flattening members are provided with an arc-shaped transition angle on the feeding side. The driving structure includes a plurality of driving members respectively connected to each of the flattening members. The driving members are used to provide pressure acting on the surface of the bag to the corresponding flattening members.

[0007] In some embodiments, the plurality of flattening members are arranged at equal intervals.

[0008] In some embodiments, the flattening component includes a pressing block, a plurality of the pressing blocks are arranged in a straight line on the feed side of the cutter structure, and the bottom of the pressing block is a flat surface, and the feed side of the pressing block is provided with a chamfer.

[0009] In some embodiments, the bag flattening mechanism further includes an installation body, which has a groove corresponding to the pressing block, and one end of the pressing block extends into the groove and is slidably connected to the groove.

[0010] In some embodiments, the driving element includes a spring disposed inside the slide groove, one end of which is connected to the mounting body and the other end of which is connected to the pressure block.

[0011] In some embodiments, the mounting body includes a mounting frame and a movable plate. The mounting frame is provided with a sliding groove and an adjustment groove connecting each of the sliding grooves. The movable plate is slidably disposed inside the adjustment groove. By adjusting the position of the movable plate in the adjustment groove, the compression of the spring can be adjusted.

[0012] In some embodiments, the bag flattening mechanism further includes an adjusting member connected to the movable plate for driving the movable plate to slide within the adjusting groove to adjust the compression of the spring.

[0013] In some embodiments, the adjusting member includes a first threaded rod and a first handle, and the bag flattening mechanism further includes a mounting frame. The mounting frame is fixed on the mounting frame, the first threaded rod passes through the mounting frame and is threadedly connected to the mounting frame, one end of the first threaded rod is rotatably connected to the movable plate, and the other end is connected to the first handle.

[0014] In some embodiments, the bag flattening mechanism further includes a correction guide and a correction drive. The correction guide is disposed on one side of the flattening structure and has a guide channel formed inside for guiding the bag before it enters the flattening structure. The correction drive is connected to the correction guide and is used to drive the correction guide to swing to adjust the guide angle of the correction guide.

[0015] Secondly, this utility model also provides a heat-cutting device, including a bag flattening mechanism as described in any one of the above.

[0016] Compared with existing technologies, the bag flattening mechanism and hot-cutting device provided by this utility model achieves precise adaptive flattening of the bag surface by setting up a flattening structure and a driving structure, and adopting independent floating flattening components. Under the control of an independent driving component, each flattening component can float up and down independently according to the actual shape of the bag surface, accurately responding to the undulations of different areas. When local bulges appear on the bag surface, the corresponding flattening component will automatically float up and apply appropriate pressure to eliminate them; while for wrinkled areas, the flattening component will maintain appropriate pressure to smooth and flatten them. This ensures that the pressure distribution throughout the entire bag width is always optimally matched with the bag surface shape, which not only completely eliminates surface wrinkles, but also effectively avoids the problem of damage to the bag or seal due to pressure concentration, thus solving the technical problems of poor bag flattening effect and easy local deformation or pressure damage of the bag in the prior art. Attached Figure Description

[0017] Figure 1 This is a front view structural schematic diagram of the bag flattening mechanism and hot cutting device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the main view cross-sectional structure of the bag flattening mechanism and the hot cutting device provided in this embodiment of the utility model; Figure 3 This is a front sectional view of the flattening structure and drive structure of the bag flattening mechanism and hot cutting device provided in this embodiment of the utility model. Figure 4 This is a side sectional view of the flattening structure and drive structure of the bag flattening mechanism and hot cutting device provided in this embodiment of the utility model. Figure 5 This is a top view of the corrective guide and corrective drive components of the bag flattening mechanism and hot cutting device provided in this embodiment of the utility model. Figure 6 This is a side view sectional structural diagram of the bag flattening mechanism and hot cutting device provided in this embodiment of the utility model, showing the installation of the correction guide component.

[0018] Explanation of reference numerals in the attached drawings: 1. Flattening structure; 11. Pressing block; 2. Drive structure; 21. Spring; 3. Mounting body; 31. Mounting frame; 311. Slide groove; 312. Adjustment groove; 32. Movable plate; 4. Adjusting component; 41. First threaded rod; 42. First handle; 5. Mounting frame; 6. Correction guide component; 61. Correction roller; 62. Fixing frame; 63. Gear set; 7. Correction drive component; 8. Adjustment mechanism; 81. Second threaded rod; 82. Second handle; 83. Bearing frame; 9. Guide structure; 10. Cutting structure; 101. Frame. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the technical problems of poor bag flatness and the resulting localized deformation or damage to the bag, this invention provides a bag flattening mechanism and a heat-cutting device. This mechanism enables precise adaptive flattening of the bag surface, eliminating wrinkles and effectively preventing damage to the bag or its seal due to concentrated pressure.

[0021] Please see Figures 1 to 4 In a first aspect, the present invention provides a bag flattening mechanism, including a flattening structure 1 and a driving structure 2. The flattening structure 1 includes a plurality of flattening members arranged at intervals along a direction perpendicular to the feeding direction. The flattening members are disposed on the feeding side of the cutter structure 10, and the flattening members 11 are provided with an arc-shaped transition angle on the feeding side. The driving structure 2 includes a plurality of driving members respectively connected to each flattening member. The driving members are used to provide pressure acting on the surface of the bag to the corresponding flattening member.

[0022] This invention employs multiple flattening components spaced at intervals perpendicular to the feeding direction. These flattening components are positioned on the feeding side of the cutter structure 10. Before cutting, the bag passes through these components, each capable of independently floating up and down to flatten different areas of the bag surface. Each flattening component is equipped with an independent drive unit, which provides force to the corresponding component, ensuring that the bag surface is subjected to uniform pressure while adapting to local undulations, thereby effectively eliminating wrinkles and bulges.

[0023] Please see Figures 1 to 4 In some possible embodiments, the multiple flattening components in this solution are arranged at equal intervals, which not only ensures the uniformity of the flattening effect but also improves the stability and reliability of the mechanism. The spacing between the flattening components is between 50mm and 150mm, and can be flexibly adjusted according to actual production needs to ensure sufficient clearance for the woven bags to pass through smoothly without generating excessive resistance. The flattening component is a pressing block 11, and several pressing blocks 11 are arranged in a straight line on the feeding side of the cutter structure 10. The bottom of the pressing block 11 is a flat surface, which contacts the surface of the bag to achieve the flattening effect. At the same time, the pressing block 11 has an arc-shaped chamfer on the side away from the cutter structure 10 to facilitate the smooth entry of the bag into the flattening area.

[0024] Furthermore, the initial pressure of a single pressure block 11 is set in the range of 5-15N. The operation is carried out using the minimum pressure that can effectively flatten the wrinkles. This ensures the flattening effect while avoiding unnecessary damage to the bag due to excessive pressure.

[0025] To achieve flexible adjustment and precise control of the flattening component, please refer to [link / reference needed]. Figure 3 and Figure 4 In some possible embodiments, the bag flattening mechanism further includes a mounting body 3, and a driving component including a spring 21. The mounting body 3 is provided with a groove 311 corresponding to the pressure block 11. One end of the pressure block 11 extends into the groove 311 and is slidably connected to the groove 311, allowing the pressure block 11 to move flexibly within the groove 311 under the action of the driving component. The spring 21 is located inside the groove 311, with one end connected to the mounting body 3 and the other end connected to the pressure block 11. The driving component uses a spring 21 design, which can achieve precise driving of the pressure block 11 through the compression and release of the spring 21. When the bag passes through the flattening component, the spring 21 will automatically adjust the degree of compression according to the undulation of the bag surface, so that the pressure block 11 always maintains close contact with the bag surface, achieving an efficient flattening effect.

[0026] In some possible embodiments, please refer to Figure 3 and Figure 4 The mounting body 3 includes a mounting frame 31 and a movable plate 32. The mounting frame 31 is provided with a sliding groove 311 and an adjustment groove 312 connecting each sliding groove 311. The movable plate 32 is slidably disposed inside the adjustment groove 312. By adjusting the position of the movable plate 32 in the adjustment groove 312, the compression amount of the spring 21 can be adjusted, thereby realizing flexible adjustment of the pressure of the flattening component.

[0027] For user convenience in adjusting the movable plate 32, please refer to [link / reference needed]. Figure 3 and Figure 4 In some possible embodiments, the bag flattening mechanism further includes an adjusting member 4, which is connected to the movable plate 32 and is used to drive the movable plate 32 to slide within the adjusting groove 312 to adjust the compression of the spring 21. In actual operation, the pressure of a single pressure block 11 can be finely adjusted by adjusting the compression of the spring 21 according to the material, thickness, and severity of wrinkles of the bag, in order to achieve the best flattening effect. The adjusting member 4 includes a first threaded rod 41 and a first handle 42. The bag flattening mechanism also includes a mounting frame 5, on which the mounting frame 31 is fixed. The first threaded rod 41 passes through the mounting frame 5 and is threadedly connected to it. One end of the first threaded rod is rotatably connected to the movable plate 32, and the other end is connected to the first handle 42.

[0028] Further, please refer to Figure 4 In this embodiment, two sets of adjusting members 4 are provided, which are respectively connected to both sides of the movable plate 32. By rotating the first handle 42 on the two sets of adjusting members 4, the movable plate 32 can slide smoothly in the adjusting groove 312 to synchronously adjust the compression of multiple springs 21, ensuring that the forces on both sides of the movable plate 32 are balanced, thereby ensuring the consistency of the pressure of each pressing member.

[0029] During adjustment, the first threaded rod 41 can be rotated by rotating the first handle 42. Since the first threaded rod 41 is threadedly connected to the mounting bracket 5, it will move along its axial direction under the action of the thread, thereby driving the movable plate 32, which is rotatably connected to it, to slide within the adjustment groove 312. When the movable plate 32 moves, it changes the compression of the spring 21 within the slide groove 311. After the compression of the spring 21 changes, the pressure applied to the pressure block 11 will also change accordingly, allowing for precise adjustment of the pressure of a single pressure block 11 according to actual needs. When the bag material is relatively soft, thin, or the wrinkles are not severe, the compression of the spring 21 can be appropriately reduced to lower the pressure of the pressure block 11 and avoid excessive compression of the bag. Conversely, when the bag material is relatively hard, thick, or the wrinkles are severe, the compression of the spring 21 can be increased to raise the pressure of the pressure block 11, ensuring effective elimination of wrinkles and bulges on the bag surface.

[0030] Of course, in other possible embodiments, the driving component can also be a precision cylinder with a pressure regulating valve. The cylinder can precisely control the output pressure through the pressure regulating valve, thereby providing a stable and adjustable force to the pressure block 11. In other possible embodiments, other driving structures 2, such as cylinders, can also be used as adjusting components 4 to adjust the compression degree of the spring 21. Multiple adjusting components 4 can also be provided, each connected to the other end of the spring 21 via an independent sliding plate. Each adjusting component 4 can independently control the compression amount of its corresponding spring 21, allowing for more precise adjustment of the pressure of each pressure block 11 according to the wrinkles in different areas of the bag.

[0031] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 In some possible embodiments, the device also includes a correction guide 6 and a correction drive 7. The correction guide 6 is disposed on one side of the flattening structure 1, and has a guide channel formed inside it for guiding the bag before it enters the flattening structure 1. The correction drive 7 is connected to the correction guide 6 and is used to drive the correction guide 6 to swing to adjust the guiding angle of the correction guide 6. This design can effectively solve the problem of poor flattening effect caused by bag deviation during transportation, further improving the practicality and reliability of the device.

[0032] Please see Figure 5 and Figure 6In some possible embodiments, the correction guide 6 includes two parallel correction rollers 61 and a fixed frame 62 for supporting the correction rollers 61. The correction rollers 61 are rotatably mounted on the fixed frame 62, and a guide channel is formed between the two correction rollers 61. The bag passes between the two correction rollers 61 during the conveying process. The correction drive 7 can be an electric push rod or a cylinder, etc. One end of the electric push rod or cylinder is connected to the mounting frame 5, and the other end is fixed to the frame 101 of the device. When the bag deviates during the conveying process, the correction drive 7 is activated, pushing or pulling the mounting frame 5, causing the two correction rollers 61 to swing in opposite directions, thereby changing the angle of the guide channel and readjusting the deviated bag to the correct conveying path.

[0033] Further, please refer to Figure 6 The guide component 6 also includes an adjustment mechanism 8. Two adjustment mechanisms 8 are provided, respectively installed on both sides of the top of the fixed frame 62, and respectively connected to the two ends of the upper correction roller 61. The adjustment mechanism 8 includes a second threaded rod 81, a second handle 82, and a bearing bracket 83. The second threaded rod 81 passes through a pre-set threaded hole in the top of the fixed frame 62 and is threadedly connected to the fixed frame 62. Its lower end is rotatably connected to the two ends of the upper correction roller 61 through the bearing bracket 83, and its upper end is fixedly connected to the second handle 82. When it is necessary to adjust the distance between the two correction rollers 61, the second threaded rod 81 is rotated by rotating the second handle 82. Since the second threaded rod 81 is threadedly connected to the fixed frame 62, under the action of the thread, the second threaded rod 81 will move up and down along its axial direction, thereby driving the upper correction roller 61 to rise or fall, thus changing the distance between the two correction rollers 61 to adapt to the conveying needs of bags of different widths.

[0034] Furthermore, in some possible embodiments, the guiding component 6 also includes a drive mechanism, which comprises a gear set 63 and a motor. The motor is mounted on one side of the fixed frame 62, and its output shaft is connected to the gear set 63. The two gear sets 63 are respectively connected to the two guiding rollers 61. After the motor starts, it transmits power to the guiding rollers 61 through the gear set 63, causing the two guiding rollers 61 to rotate synchronously. This provides power for the transport of the bag in the guide channel, ensuring that the bag can pass through smoothly and steadily.

[0035] Furthermore, please refer to Figure 1 and Figure 2 After the flattening structure 1, a guide structure 9 is also provided. The guide structure 9 has the same structure as the correction guide 6. After the bag is flattened, it can further guide the bag along the predetermined path to prevent the bag from deviating again during subsequent processing or transmission.

[0036] Secondly, this utility model also provides a heat-cutting device, which includes the bag-body flattening mechanism described above. By applying this bag-body flattening mechanism to the heat-cutting device, the problems of inaccurate cutting and high defect rate caused by uneven surface of the bag during the heat-cutting process can be effectively solved, thereby improving the production efficiency and product quality of the heat-cutting device.

[0037] To better understand this utility model, the following is combined with... Figures 1 to 6 The technical solution of this utility model is described in detail below: During processing, before the bag body undergoes hot cutting, it first passes through the guide channel of the correction guide 6. The correction drive 7 adjusts the angle of the correction guide 6 in real time according to the bag's conveying condition to ensure the bag body accurately enters the flattening structure 1. The bag body then enters the flattening structure 1 area of ​​the bag flattening mechanism. At this time, multiple flattening components arranged at intervals perpendicular to the feeding direction float independently up and down according to the undulation of the bag surface. The spring 21 provides precise and adaptable force to the flattening components, ensuring that the bag surface is uniformly and effectively flattened before entering the cutting structure 10, eliminating wrinkles and bulges. Finally, the bag body enters the cutting structure 10 through the guide structure 9, where it completes the hot cutting process under the action of the cutting structure 10.

[0038] This invention achieves precise adaptive flattening of the bag surface by setting up a flattening structure 1 and a driving structure 2, and employing independently floating flattening components. Each flattening component, under the control of an independent driving component, can float independently up and down according to the actual shape of the bag surface, accurately responding to undulations in different areas. When local bulges appear on the bag surface, the corresponding flattening component automatically floats up and applies appropriate pressure to eliminate them; while for wrinkled areas, the flattening component maintains appropriate pressure for smoothing. This ensures that the pressure distribution across the entire bag width remains optimally matched to the bag surface shape, completely eliminating surface wrinkles and effectively avoiding damage to the bag or seal caused by concentrated pressure. This solves the technical problems of poor bag flattening and easy local deformation or pressure damage in existing technologies.

[0039] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A bag-flattening mechanism, characterized in that, include: The flattening structure includes a plurality of flattening members arranged at intervals along a direction perpendicular to the feeding direction. The flattening members are disposed on the feeding side of the cutting structure, and the flattening members are provided with an arc-shaped transition angle on the feeding side. as well as The driving structure includes a plurality of driving members connected to each of the flattening members respectively, the driving members being used to provide pressure acting on the surface of the bag body to the corresponding flattening member.

2. The bag flattening mechanism according to claim 1, characterized in that, The multiple flattening components are arranged at equal intervals.

3. The bag flattening mechanism according to claim 2, characterized in that, The flattening component includes a pressing block, and several pressing blocks are arranged in a straight line on the feed side of the cutter structure. The bottom of the pressing block is flat, and the feed side of the pressing block is chamfered.

4. The bag flattening mechanism according to claim 3, characterized in that, It also includes an installation body, which has a groove corresponding to the pressure block, and one end of the pressure block extends into the groove and is slidably connected to the groove.

5. The bag flattening mechanism according to claim 4, characterized in that, The driving component includes a spring, which is disposed inside the slide groove. One end of the spring is connected to the mounting body, and the other end is connected to the pressure block.

6. The bag flattening mechanism according to claim 5, characterized in that, The mounting body includes a mounting frame and a movable plate. The mounting frame is provided with a sliding groove and an adjustment groove connecting each of the sliding grooves. The movable plate is slidably disposed inside the adjustment groove. By adjusting the position of the movable plate in the adjustment groove, the compression of the spring can be adjusted.

7. The bag flattening mechanism according to claim 6, characterized in that, It also includes an adjusting member connected to the movable plate, which drives the movable plate to slide within the adjusting groove to adjust the compression of the spring.

8. The bag flattening mechanism according to claim 7, characterized in that, The adjusting component includes a first threaded rod and a first handle. The bag flattening mechanism also includes a mounting frame. The mounting frame is fixed on the mounting frame. The first threaded rod passes through the mounting frame and is threadedly connected to the mounting frame. One end of the first threaded rod is rotatably connected to the movable plate, and the other end is connected to the first handle.

9. The bag flattening mechanism according to claim 1, characterized in that, The bag flattening mechanism also includes a correction guide and a correction drive. The correction guide is disposed on one side of the flattening structure and has a guide channel formed inside for guiding the bag before it enters the flattening structure. The correction drive is connected to the correction guide and is used to drive the correction guide to swing to adjust the guide angle of the correction guide.

10. A heat-cutting device, characterized in that, Includes the bag flattening mechanism as described in any one of claims 1-9.

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