A bagging bag edge uniformity adds fixed position jig and positioning process

Abstract

The present application relates to the technical field of packaging bag edge sealing, in particular to a packaging bag edge sealing uniformity fixing jig and positioning process. It comprises a base, the top of the base is provided with a loosening roller and a winding roller, the packaging bag body is wound between the loosening roller and the winding roller, a pair of horizontal installation plates are arranged between the top of the loosening roller and the winding roller, vertical installation plates are fixedly arranged on the two sides of the two horizontal installation plates away from each other, and the two horizontal installation plates and the two vertical installation plates form a processing cavity; the pressure bearing smoothing block is driven by the driving block to move downward, on the one hand, the bottom of the pressure bearing smoothing block is in contact with the bottom of the packaging bag body, so that the wrinkles of the packaging bag body passing through the bottom are smoothed, on the other hand, the airflow blown by the cooling assembly passes through the air inlet groove into the cooling air duct, and then flows downward along the cooling air duct to the surface of the packaging bag body, so as to accelerate the cooling and shaping of the packaging bag body width edge sealing.

Description

Technical Field

[0001] This invention relates to the field of packaging bag sealing technology, specifically to a bag sealing uniform and fixed positioning fixture and positioning process. Background Technology

[0002] In the packaging bag processing and production field, double-layer plastic packaging bags generally adopt a processing technology that first seals the length side and then intermittently seals the width side. This process is suitable for continuous roll material conveying production mode, relying on the cooperation of the unloading roller and the take-up roller to achieve continuous feeding and taking-up of packaging bags, resulting in high production efficiency. It is widely used in the batch processing of various lightweight packaging bags. Heat sealing is the core processing method for sealing the width of packaging bags. Through a heat sealing structure, the packaging bag is intermittently heat-sealed while it is in motion, thereby completing the complete sealing and shaping of the packaging bag and ensuring its sealing performance.

[0003] Traditional hot-press sealing fixtures for packaging bags currently exhibit the following significant defects during actual processing: When the packaging bag is intermittently sealed by the hot-pressing assembly, the heat-sealing structure presses and fixes the bag. At this time, the take-up roller stops pulling the bag forward, but the release roller continues to release the bag outward. This causes a brief imbalance in the material conveying rhythm, making the packaging bag on the upstream side of the heat-sealing station highly susceptible to wrinkles. These wrinkles not only lead to misalignment of the sealing position and reduced uniformity of the sealing, resulting in product appearance defects, but also cause uneven thickness at the sealing edge, significantly reducing the finished product's pass rate and processing accuracy.

[0004] In view of this, we propose a bag edge binding uniformly plus a fixed positioning fixture and positioning process to improve the shortcomings of the existing technology. Summary of the Invention

[0005] One of the objectives of this invention is to provide a bag edge-sealing uniform and fixed-position fixture, which solves the problem in existing bag sealing devices where a brief imbalance in the material conveying rhythm causes the bag on the upstream side of the heat-sealing station to easily develop wrinkles.

[0006] To achieve the above objectives, the bag edge-wrapping uniform and fixed positioning fixture includes a base, the top of which is provided with a release roller and a take-up roller. The packaging bag body is wound between the release roller and the take-up roller. The top of the release roller is provided with a pair of horizontal mounting plates between the release roller and the take-up roller. Vertical mounting plates are fixedly provided on both sides of the two horizontal mounting plates that are far apart from each other. The two horizontal mounting plates and the two vertical mounting plates form a processing cavity. The packaging bag body passes through the processing chamber. Inside the processing chamber, along the direction of travel of the packaging bag body, a hot pressing component, a smoothing component, and a cooling component are arranged sequentially below the horizontal mounting plate. The hot pressing component is used to intermittently seal the packaging bag body. The cooling component is used to blow air onto the side of the smoothing component away from the hot pressing component to cool down the packaging bag body at the bottom of the smoothing component. The smoothing component can also smooth out wrinkles on the surface of the packaging bag body.

[0007] In the above technical solution, the two ends of the packaging bag body to be processed are respectively wound around the release roller and the take-up roller, and the packaging bag body passes through the processing chamber; the unprocessed packaging bag body is essentially a double-layer plastic bag, but it is only sealed along its own length direction, but not in the width direction. During the process of the packaging bag body passing through the bottom of the hot pressing component, the hot pressing component intermittently seals the width direction of the packaging bag body passing below it.

[0008] During this process, because the hot-pressing assembly applies pressure to the packaging bag body, the take-up roller stops pulling the packaging bag body forward, but the release roller continues to release the packaging bag body outward. Therefore, during the sealing process of the packaging bag body by the hot-pressing assembly, wrinkles will form on the packaging bag body located downstream of the hot-pressing assembly. In this application, the cooling assembly blows air downstream of the smoothing assembly, which cools the sealed area on the surface of the packaging bag body and drives the bottom of the smoothing assembly to contact the wrinkles on the surface of the packaging bag body, thereby smoothing the wrinkles.

[0009] Based on this, the hot pressing assembly includes a limiting plate fixedly connected between two adjacent vertical mounting plates, a heat sealing knife slidably connected below the limiting plate in the vertical direction, and a hydraulic rod for driving the heat sealing knife to rise and fall above the limiting plate. The heat sealing knife is located above the packaging bag body.

[0010] Furthermore, a base support is fixedly connected between the two vertical mounting plates below the packaging bag body. The hydraulic rod includes a cylinder and a piston rod. The cylinder is fixedly connected to the horizontal mounting plate, and the piston rod is fixedly connected to the heat sealing knife. The piston rod passes through a limiting plate. Several guide rods are fixedly connected to the top of the heat sealing knife on both sides of the piston rod. The guide rods are slidably connected to the limiting plate.

[0011] With this design, when the unsealed packaging bag body passes between the heat sealing knife and the base, the hydraulic rod drives the piston rod to extend from the cylinder body every time the packaging bag body travels a preset distance. This drives the heat sealing knife to descend. As the heat sealing knife moves downward, it presses the unsealed packaging bag body between the base and the heat sealing knife, thereby sealing the packaging bag body in the width direction.

[0012] During the above process, the packaging bag body is fixed to the bottom support by the heat sealing knife when sealing the edge, and it cannot be pulled forward by the take-up roller. However, the unwinding roller wrapped around its other end still unwinds the packaging bag body outward, so the packaging bag body upstream of the heat sealing knife will produce wrinkles.

[0013] In another technical solution, the smoothing component includes a first vertical plate, a second vertical plate, and a third vertical plate, which are arranged sequentially along the direction of travel of the packaging bag body. The first and second vertical plates are fixedly connected to the bottom of the vertical mounting plate, and the third vertical plate is slidably connected to the bottom of the vertical mounting plate, with the sliding direction parallel to the direction of travel of the packaging bag body in the processing cavity.

[0014] Furthermore, a driving block is fixedly connected to the bottom of the third vertical plate on the side close to the second vertical plate, and a pressure-bearing smoothing block is provided between the first vertical plate and the driving block, and the pressure-bearing smoothing block slides in the vertical direction.

[0015] The second vertical plate has several second limiting rods fixedly connected to the side near the third vertical plate. The second limiting rods are slidably connected to the third vertical plate, and a second spring is sleeved on the outside of the second limiting rods between the second vertical plate and the third vertical plate.

[0016] Furthermore, a lower horizontal plate is fixedly connected to the bottom of the first vertical plate on the side near the pressure-bearing smoothing block, and an upper horizontal plate is fixedly connected to the top of the pressure-bearing smoothing block on the side near the first vertical plate. The pressure-bearing smoothing block is located above the lower horizontal plate, and a plurality of first limiting rods are fixedly connected to the top of the lower horizontal plate. A first spring is sleeved on the outside of the first limiting rods between the lower horizontal plate and the upper horizontal plate.

[0017] Both the driving block and the pressure-bearing smoothing block have inclined surfaces on their adjacent sides, and the two slide and fit together through the inclined surfaces. The bottom of the driving block has several air inlet slots, and the side of the pressure-bearing smoothing block near the driving block has several cooling air ducts. The air inlet slots are connected to the cooling air ducts.

[0018] In this technical solution, after the cooling component starts working, the airflow it blows pushes the third vertical plate to move closer to the second vertical plate. During this process, as the distance between the two decreases, the second spring is compressed and stores elastic potential energy. After the airflow disappears, the third vertical plate returns to its original position under the restoring force of the second spring.

[0019] During the above process, the drive block moves horizontally in sync with the third vertical plate. Since the pressure-bearing smoothing block and the drive block are in contact through the inclined surface, the pressure-bearing smoothing block is driven by the inclined surface at the bottom of the drive block to move vertically. That is, the upper horizontal plate moves closer to the lower horizontal plate in the vertical direction, so that the first spring is compressed and stores elastic potential energy. After the drive block is reset, the pressure-bearing smoothing block is reset again under the action of the restoring force of the first spring.

[0020] At this time, the pressure-bearing smoothing block is pushed down by the driving block. On the one hand, the bottom of the pressure-bearing smoothing block contacts the bottom of the packaging bag body, thereby smoothing the wrinkles of the packaging bag body passing through its bottom. On the other hand, the airflow blown out by the cooling component passes through the air inlet slot to the cooling air duct, and then flows down along the cooling air duct to the surface of the packaging bag body, thereby accelerating the cooling and shaping of the width sealing edge of the packaging bag body.

[0021] In addition, the cooling assembly includes a baffle fixedly connected to the bottom wall of the processing cavity. Several cooling holes are provided on the baffle at the junction of the third vertical plate and the air inlet slot. A fan is rotatably connected inside the cooling holes. The force point of the airflow blown out by the fan is located above the junction of the third vertical plate and the air inlet slot.

[0022] As can be seen from the above scheme, when the package body after sealing in the width direction passes through the bottom of the pressure-bearing and smoothing block, the power supply of the motor connected to the fan is turned on, which drives the fan to rotate and blow airflow towards the direction close to the third vertical plate. Since the airflow force point is located above the junction of the third vertical plate and the air inlet groove, that is to say, most of the thrust generated by the airflow is applied to the third vertical plate, while a small part of the airflow passes through the air inlet groove and the cooling air channel, and reaches the bottom of the pressure-bearing and smoothing block to cool down the sealing edge of the package body.

[0023] The second objective of this invention is to provide a positioning process for uniformly adding a fixing fixture to the edge of a bag, comprising the following steps: S1. Wrap the two ends of the packaging bag body to be processed around the release roller and the take-up roller respectively, and make the packaging bag body pass through the processing cavity; every time the packaging bag body travels a preset distance, the hydraulic rod drives the heat sealing knife to descend, pressing the packaging bag body between the bottom support and the heat sealing knife, and intermittently sealing the width of the packaging bag body; during the sealing stage, the packaging bag body is fixed, the take-up roller stops pulling the packaging bag body, the release roller continues to feed out the packaging bag body, and the packaging bag body produces wrinkles; S2. Start the fan to make it rotate and blow out airflow. Most of the airflow thrusts the third vertical plate, pushing the third vertical plate to move and compressing the second spring to store elastic potential energy. The drive block moves horizontally in sync with the third vertical plate. The drive block pushes the pressure-bearing flat block to move vertically downward by relying on the inclined surface, compressing the first spring to store elastic potential energy. S3. After the pressure-bearing smoothing block moves down, its bottom contacts the packaging bag body and smooths out the wrinkles on the surface of the packaging bag body; part of the airflow blown out by the fan flows through the air inlet slot into the cooling air duct and flows downward to the surface of the packaging bag body to cool and shape the sealing position of the packaging bag body. S4. When the fan stops rotating and the airflow disappears, the second spring releases its elastic potential energy to drive the third vertical plate and the drive block to reset; the first spring releases its elastic potential energy to drive the pressure-bearing smoothing block to reset, completing a single sealing, smoothing and cooling cycle, waiting for the packaging bag body to continue to be conveyed and enter the next round of processing.

[0024] Based on the above description, the beneficial effects of the present invention compared with the prior art are as follows: When the package body after sealing the width direction passes the bottom of the pressure-bearing smoothing block, the driving block moves horizontally in sync with the third vertical plate. Since the pressure-bearing smoothing block and the driving block are in contact through the inclined surface, the pressure-bearing smoothing block is driven by the inclined surface at the bottom of the driving block to move vertically. That is, the upper horizontal plate moves closer to the lower horizontal plate in the vertical direction, causing the first spring to be compressed and stored to store elastic potential energy. After the driving block is reset, the pressure-bearing smoothing block is reset again under the action of the restoring force of the first spring. At this time, the pressure-bearing smoothing block is pushed down by the driving block. On the one hand, the bottom of the pressure-bearing smoothing block contacts the bottom of the packaging bag body, thereby smoothing the wrinkles of the packaging bag body passing through its bottom. On the other hand, the airflow blown out by the cooling component passes through the air inlet slot to the cooling air duct, and then flows down along the cooling air duct to the surface of the packaging bag body, thereby accelerating the cooling and shaping of the width sealing edge of the packaging bag body. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a partial cross-sectional perspective view of the present invention; Figure 3 This is a partial side view schematic diagram of the present invention; Figure 4 This is a cross-sectional perspective view of the hot-pressing assembly in this invention; Figure 5 This is a side view schematic diagram of the hot-pressing assembly in this invention; Figure 6 This is a cross-sectional perspective view of the smoothing component in this invention; Figure 7 This is a side view schematic diagram of the smoothing component in this invention; Figure 8 This is a cross-sectional perspective view of the cooling component in this invention; Figure 9 This is a side view schematic diagram of the cooling component in this invention.

[0026] The meanings of the labels in the diagram are as follows: 100. Base; 101. Unloading roller; 102. Rewinding roller; 103. Packaging bag body; 110. Horizontal mounting plate; 120. Vertical mounting plate; 200. Hot pressing assembly; 210. Base support; 220. Limiting plate; 230. Heat sealing knife; 231. Guide rod; 240. Hydraulic rod; 300. Smoothing component; 310. First vertical plate; 311. Lower horizontal plate; 312. First limiting rod; 313. First spring; 320. Second vertical plate; 321. Second limiting rod; 322. Second spring; 330. Third vertical plate; 340. Drive block; 341. Air inlet slot; 350. Pressure-bearing smoothing block; 351. Cooling air duct; 352. Upper horizontal plate; 400. Cooling assembly; 410. Baffle; 411. Cooling hole; 420. Fan. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0029] Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Example 1: In the prior art, when the packaging bag is intermittently sealed by the heat-sealing assembly, the heat-sealing structure presses and fixes the packaging bag. At this time, the take-up roller stops pulling the packaging bag forward, but the release roller continues to release the packaging bag outward. This causes a temporary imbalance in the material conveying rhythm, making the packaging bag on the upstream side of the heat-sealing station very prone to wrinkles. Wrinkle defects not only cause the packaging bag sealing position to shift and the edge uniformity to decrease, resulting in product appearance defects, but also cause uneven thickness at the sealing position, significantly reducing the finished product qualification rate and processing accuracy of the packaging bag.

[0031] Please see Figures 1-3The purpose of this embodiment is to provide a bag edge binding uniform and fixed positioning fixture, including a base 100. The top of the base 100 is provided with a release roller 101 and a take-up roller 102. A packaging bag body 103 is wound between the release roller 101 and the take-up roller 102. The top of the release roller 101 is provided with a pair of horizontal mounting plates 110 between the release roller 101 and the take-up roller 102. Vertical mounting plates 120 are fixedly provided on both sides of the two horizontal mounting plates 110 that are far apart. The two horizontal mounting plates 110 and the two vertical mounting plates 120 form a processing cavity. The packaging bag body 103 passes through the processing cavity. Inside the processing cavity, along the direction of travel of the packaging bag body 103, a hot pressing component 200, a smoothing component 300, and a cooling component 400 are arranged sequentially below the horizontal mounting plate 110. The hot pressing component 200 is used to intermittently seal the packaging bag body 103. The cooling component 400 is used to blow air onto the side of the smoothing component 300 away from the hot pressing component 200 to cool down the packaging bag body 103 at the bottom of the smoothing component 300. The smoothing component 300 can smooth out the wrinkles on the surface of the packaging bag body 103.

[0032] Working principle: First, the two ends of the packaging bag body 103 to be processed are respectively wound around the release roller 101 and the take-up roller 102, and the packaging bag body 103 passes through the processing cavity. The unprocessed packaging bag body 103 is essentially a double-layer plastic bag, but it is only sealed along its own length direction, but not in the width direction. During the process of the packaging bag body 103 passing through the bottom of the hot pressing assembly 200, the hot pressing assembly 200 intermittently seals the packaging bag body 103 passing below it in the width direction.

[0033] During this process, because the hot pressing assembly 200 applies pressure to the packaging bag body 103, the take-up roller 102 stops pulling the packaging bag body 103 forward, but the release roller 101 continues to release the packaging bag body 103 outward. Therefore, during the sealing process of the packaging bag body 103 by the hot pressing assembly 200, wrinkles will form on the downstream side of the hot pressing assembly 200. In this application, the cooling assembly 400 blows air to the downstream side of the smoothing assembly 300, which cools the sealed edge of the packaging bag body 103 and drives the bottom of the smoothing assembly 300 to contact the wrinkled area on the surface of the packaging bag body 103, thereby smoothing the wrinkles.

[0034] Next, as Figure 4 and Figure 5As shown, the hot-pressing assembly 200 intermittently seals the packaging bag body 103 along its width direction. The hot-pressing assembly 200 includes a limiting plate 220 fixedly connected between two adjacent vertical mounting plates 120. A heat sealing knife 230 is slidably connected below the limiting plate 220 along the vertical direction. A hydraulic rod 240 for driving the heat sealing knife 230 to rise and fall is provided above the limiting plate 220. The heat sealing knife 230 is located above the packaging bag body 103.

[0035] Furthermore, a base support 210 is fixedly connected between the two vertical mounting plates 120 below the packaging bag body 103. The hydraulic rod 240 includes a cylinder and a piston rod. The cylinder is fixedly connected to the horizontal mounting plate 110, and the piston rod is fixedly connected to the heat sealing knife 230. The piston rod passes through the limiting plate 220. Several guide rods 231 are fixedly connected to the top of the heat sealing knife 230 on both sides of the piston rod. The guide rods 231 are slidably connected to the limiting plate 220.

[0036] It should be noted that when the unsealed packaging bag body 103 in the width direction passes between the heat sealing knife 230 and the bottom support 210, the hydraulic rod 240 will drive the piston rod to extend from the cylinder body for every preset distance traveled by the packaging bag body 103. This will drive the heat sealing knife 230 to descend. As the heat sealing knife 230 moves downward, it will press the unsealed packaging bag body 103 between the bottom support 210 and the heat sealing knife 230, thereby achieving sealing of the packaging bag body 103 in the width direction.

[0037] During the above process, since the packaging bag body 103 is fixed by the heat sealing knife 230 on the bottom support 210 when sealing the edge, it cannot be pulled forward by the take-up roller 102. However, the unwinding roller 101 wound on the other end still unwinds the packaging bag body 103 outward, so the packaging bag body 103 on the upstream side of the heat sealing knife 230 will produce wrinkles.

[0038] For the above scenario, please refer to Figure 6 and Figure 7 The specific process of smoothing wrinkles using the smoothing component 300 is disclosed. The smoothing component 300 includes a first vertical plate 310, a second vertical plate 320, and a third vertical plate 330, which are arranged sequentially along the direction of travel of the packaging bag body 103. The first vertical plate 310 and the second vertical plate 320 are both fixedly connected to the bottom of the vertical mounting plate 120, and the third vertical plate 330 is slidably connected to the bottom of the vertical mounting plate 120, and the sliding direction is parallel to the direction of travel of the packaging bag body 103 in the processing cavity.

[0039] Furthermore, a driving block 340 is fixedly connected to the bottom of the third vertical plate 330 on the side close to the second vertical plate 320, and a pressure-bearing smoothing block 350 is provided between the first vertical plate 310 and the driving block 340, and the pressure-bearing smoothing block 350 slides in the vertical direction.

[0040] The following discloses the positional connection relationship of the third vertical plate 330 in the processing cavity. Several second limiting rods 321 are fixedly connected to the second vertical plate 320 on the side close to the third vertical plate 330. The second limiting rods 321 are slidably connected to the third vertical plate 330. A second spring 322 is sleeved on the outer side of the second limiting rods 321 between the second vertical plate 320 and the third vertical plate 330.

[0041] Furthermore, a lower horizontal plate 311 is fixedly connected to the bottom of the first vertical plate 310 on the side near the pressure-bearing smoothing block 350, and an upper horizontal plate 352 is fixedly connected to the top of the pressure-bearing smoothing block 350 on the side near the first vertical plate 310. The pressure-bearing smoothing block 350 is located above the lower horizontal plate 311, and several first limiting rods 312 are fixedly connected to the top of the lower horizontal plate 311. A first spring 313 is sleeved on the outside of the first limiting rods 312 between the lower horizontal plate 311 and the upper horizontal plate 352.

[0042] Finally, the positional connection relationship between the drive block 340 and the pressure-bearing smoothing block 350 is disclosed. Both the drive block 340 and the pressure-bearing smoothing block 350 have inclined surfaces on their respective sides, and the two slide and fit together through the inclined surfaces. The bottom of the drive block 340 has several air inlet slots 341, and the side of the pressure-bearing smoothing block 350 near the drive block 340 has several cooling air ducts 351. The air inlet slots 341 and the cooling air ducts 351 are connected.

[0043] In other words, when the cooling component 400 starts working, the airflow it blows pushes the third vertical plate 330 to move closer to the second vertical plate 320. During this process, as the distance between the two decreases, the second spring 322 is compressed and stores elastic potential energy. After the airflow disappears, the third vertical plate 330 returns to its original position under the restoring force of the second spring 322.

[0044] During the above process, the drive block 340 moves horizontally synchronously with the third vertical plate 330. Since the pressure-bearing smoothing block 350 and the drive block 340 are in contact through the inclined surface, the pressure-bearing smoothing block 350 is driven by the inclined surface at the bottom of the drive block 340 to move vertically. That is, the upper horizontal plate 352 moves closer to the lower horizontal plate 311 in the vertical direction, causing the first spring 313 to be compressed and stored to store elastic potential energy. After the drive block 340 is reset, the pressure-bearing smoothing block 350 is reset under the action of the restoring force of the first spring 313.

[0045] At this time, the pressure-bearing smoothing block 350 is pushed down by the driving block 340. On the one hand, the bottom of the pressure-bearing smoothing block 350 contacts the bottom of the packaging bag body 103, thereby smoothing the wrinkles of the packaging bag body 103 passing through its bottom. On the other hand, the airflow blown out by the cooling component 400 passes through the air inlet slot 341 to reach the cooling air duct 351, and then flows down along the cooling air duct 351 to the surface of the packaging bag body 103, thereby accelerating the cooling and shaping of the width sealing edge of the packaging bag body 103.

[0046] Based on the above explanation, the following will be further explained... Figure 8 and Figure 9 The process of cooling component 400 driving third vertical plate 330 to cool down and smooth wrinkles is described in detail. Cooling component 400 includes baffle 410 fixedly connected to the bottom wall of processing cavity. Several cooling holes 411 are opened on baffle 410 at the junction of third vertical plate 330 and air inlet groove 341. Fan 420 is rotatably connected in cooling holes 411. The force point of airflow blown by fan 420 is located above the junction of third vertical plate 330 and air inlet groove 341.

[0047] With the above structural design, when the package body 103 after sealing in the width direction passes through the bottom of the pressure-bearing smoothing block 350, the power supply of the motor connected to the fan 420 is turned on, which drives the fan 420 to rotate and blow airflow towards the direction close to the third vertical plate 330. Since the airflow force point is located above the junction of the third vertical plate 330 and the air inlet groove 341, that is to say, most of the thrust generated by the airflow is applied to the third vertical plate 330, while a small part of the airflow passes through the air inlet groove 341 and the cooling air duct 351, and reaches the bottom of the pressure-bearing smoothing block 350 to cool the sealing edge of the package body 103.

[0048] Example 2: This example, based on the content provided in Example 1, aims to provide a positioning process for uniformly adding a fixing fixture to the edge of a bag. The specific steps are as follows: S1. The two ends of the packaging bag body 103 to be processed are respectively wound around the release roller 101 and the take-up roller 102, and the packaging bag body 103 passes through the processing cavity; every time the packaging bag body 103 travels a preset distance, the hydraulic rod 240 drives the heat sealing knife 230 to descend, pressing the packaging bag body 103 between the bottom support 210 and the heat sealing knife 230, and intermittently sealing the width of the packaging bag body 103; during the sealing stage, the packaging bag body 103 is fixed, the take-up roller 102 stops pulling the packaging bag body 103, the release roller 101 continues to feed out the packaging bag body 103, and the packaging bag body 103 produces wrinkles. S2. Start the fan 420 to make it rotate and blow out airflow. Most of the airflow thrust is applied to the third vertical plate 330, pushing the third vertical plate 330 to move and compressing the second spring 322 to store elastic potential energy. The drive block 340 moves horizontally in sync with the third vertical plate 330. The drive block 340 pushes the pressure-bearing flat block 350 to move vertically downward by relying on the inclined surface, compressing the first spring 313 to store elastic potential energy. S3. After the pressure-bearing smoothing block 350 moves down, its bottom contacts the packaging bag body 103, smoothing the wrinkles on the surface of the packaging bag body 103. Part of the airflow blown out by the fan 420 passes through the air inlet slot 341 and flows into the cooling air duct 351, flowing downward to the surface of the packaging bag body 103, cooling and shaping the sealing position of the packaging bag body 103. S4. When the fan 420 stops rotating, the airflow disappears, the second spring 322 releases its elastic potential energy to drive the third vertical plate 330 and the drive block 340 to reset; the first spring 313 releases its elastic potential energy to drive the pressure-bearing smoothing block 350 to reset, completing a single sealing, smoothing and cooling cycle, waiting for the packaging bag body 103 to continue to be conveyed and enter the next round of processing.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bag edge-wrapping uniform and fixed positioning fixture, comprising a base (100), wherein a release roller (101) and a take-up roller (102) are provided on the top of the base (100), a bag body (103) is wound between the release roller (101) and the take-up roller (102), and a pair of horizontal mounting plates (110) are provided on the top of the release roller (101) between the release roller (101) and the take-up roller (102), and vertical mounting plates (120) are fixedly provided on both sides of the two horizontal mounting plates (110) that are far apart from each other, the two horizontal mounting plates (110) and the two vertical mounting plates (120) forming a processing cavity, characterized in that: The packaging bag body (103) passes through the processing cavity. Inside the processing cavity, along the direction of travel of the packaging bag body (103), a hot pressing assembly (200), a smoothing assembly (300), and a cooling assembly (400) are arranged sequentially below the horizontal mounting plate (110). The hot pressing assembly (200) is used to intermittently seal the packaging bag body (103). The cooling assembly (400) is used to blow air onto the side of the smoothing assembly (300) away from the hot pressing assembly (200) to cool down the packaging bag body (103) at the bottom of the smoothing assembly (300). The smoothing assembly (300) can smooth out the wrinkles on the surface of the packaging bag body (103).

2. The bag edge binding uniform and fixed positioning fixture according to claim 1, characterized in that: The hot pressing assembly (200) includes a limiting plate (220) fixedly connected between two adjacent vertical mounting plates (120). A heat sealing knife (230) is slidably connected below the limiting plate (220) in the vertical direction. A hydraulic rod (240) for driving the heat sealing knife (230) to rise and fall is provided above the limiting plate (220). The heat sealing knife (230) is located above the packaging bag body (103).

3. The bag edge binding uniform and fixed positioning fixture according to claim 2, characterized in that: A base support (210) is fixedly connected between the two vertical mounting plates (120) below the packaging bag body (103). The hydraulic rod (240) includes a cylinder and a piston rod. The cylinder is fixedly connected to the horizontal mounting plate (110). The piston rod is fixedly connected to the heat sealing knife (230), and the piston rod passes through the limiting plate (220). Several guide rods (231) are fixedly connected to the top of the heat sealing knife (230) on both sides of the piston rod. The guide rods (231) are slidably connected to the limiting plate (220).

4. The bag edge binding uniform and fixed positioning fixture according to claim 1, characterized in that: The smoothing component (300) includes a first vertical plate (310), a second vertical plate (320), and a third vertical plate (330), which are arranged sequentially along the direction of travel of the packaging bag body (103). The first vertical plate (310) and the second vertical plate (320) are both fixedly connected to the bottom of the vertical mounting plate (120), and the third vertical plate (330) is slidably connected to the bottom of the vertical mounting plate (120), and the sliding direction is parallel to the direction of travel of the packaging bag body (103) in the processing cavity.

5. The bag edge binding uniform and fixed positioning fixture according to claim 4, characterized in that: The bottom of the third vertical plate (330) is fixedly connected to a driving block (340) on the side near the second vertical plate (320). A pressure-bearing smoothing block (350) is provided between the first vertical plate (310) and the driving block (340), and the pressure-bearing smoothing block (350) slides in the vertical direction.

6. The bag edge binding uniform and fixed positioning fixture according to claim 4, characterized in that: The second vertical plate (320) has several second limiting rods (321) fixedly connected to the side near the third vertical plate (330). The second limiting rods (321) are slidably connected to the third vertical plate (330). A second spring (322) is sleeved on the outside of the second limiting rods (321) between the second vertical plate (320) and the third vertical plate (330).

7. The bag edge binding uniform and fixed positioning fixture according to claim 5, characterized in that: The bottom of the first vertical plate (310) is fixedly connected to a lower horizontal plate (311) on the side near the pressure-bearing smoothing block (350). The top of the pressure-bearing smoothing block (350) is fixedly connected to an upper horizontal plate (352) on the side near the first vertical plate (310). The pressure-bearing smoothing block (350) is located above the lower horizontal plate (311). The top of the lower horizontal plate (311) is fixedly connected to a plurality of first limiting rods (312). The outer side of the first limiting rods (312) is fitted with a first spring (313) between the lower horizontal plate (311) and the upper horizontal plate (352).

8. The bag edge binding uniform and fixed positioning fixture according to claim 5, characterized in that: The driving block (340) and the pressure-bearing smoothing block (350) both have inclined surfaces on their adjacent sides, and the two slide together through the inclined surfaces. The bottom of the driving block (340) has several air inlet slots (341), and the side of the pressure-bearing smoothing block (350) near the driving block (340) has several cooling air ducts (351). The air inlet slots (341) are connected to the cooling air ducts (351).

9. The bag edge binding uniform and fixed positioning fixture according to claim 8, characterized in that: The cooling assembly (400) includes a baffle (410) fixedly connected to the bottom wall of the processing cavity. Several cooling holes (411) are provided on the baffle (410) at the junction of the third vertical plate (330) and the air inlet groove (341). A fan (420) is rotatably connected in the cooling holes (411). The force point of the airflow blown out by the fan (420) is located above the junction of the third vertical plate (330) and the air inlet groove (341).

10. A positioning process for uniformly adding a fixing fixture to the edge of a bag as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. Wrap the two ends of the packaging bag body (103) to be processed around the release roller (101) and the take-up roller (102) respectively, and let the packaging bag body (103) pass through the processing cavity; S2. As the packaging bag body (103) passes through the bottom of the hot pressing assembly (200), the hot pressing assembly (200) intermittently seals the packaging bag body (103) passing below it in the width direction; S3. The take-up roller (102) stops pulling the packaging bag body (103) forward, but the release roller (101) continues to release the packaging bag body (103) outward. Therefore, during the sealing process of the packaging bag body (103) by the hot pressing assembly (200), the packaging bag body (103) located downstream of the hot pressing assembly (200) will have wrinkles. S4. The cooling component (400) blows air onto the downstream side of the smoothing component (300), which cools the sealing edge of the packaging bag body (103) on the one hand, and drives the bottom of the smoothing component (300) to contact the wrinkles on the surface of the packaging bag body (103) on the other hand, thereby smoothing the wrinkles.

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