Bag-making and welding device for zipper stand-up pouch making machine and stand-up pouch making machine

Abstract

This utility model relates to the field of stand-up pouch manufacturing technology, and discloses a bag-making welding device and a stand-up pouch making machine for zipper stand-up pouch making. The bag-making welding device for the zipper stand-up pouch making machine includes a bottom pre-welding unit, a zipper welding unit, and a bottom welding unit. The bottom pre-welding unit is positioned above the bottom material, and the zipper welding unit is positioned downstream and / or parallel to the bottom pre-welding unit, also above the zipper material. The bottom welding unit is positioned downstream of the zipper welding unit and above the bottom material. This bag-making welding device pre-welds the bottom material to the upper and lower body materials respectively, laying a solid foundation for the subsequent formal welding of the bottom welding unit, effectively avoiding welding defects caused by relative displacement due to the lack of pre-fixation between the bottom and body materials.

Description

Technical Field

[0001] This utility model relates to the field of stand-up pouch manufacturing technology, and in particular to a bag-making welding device and a stand-up pouch making machine for zipper stand-up pouches. Background Technology

[0002] A bag-making machine is a packaging equipment controlled by a PLC or industrial computer, capable of controlling unwinding tension, edge correction, forming, and heat sealing. It can produce composite films into various bag types such as three-side seal bags and stand-up pouches. It is suitable for the production of two-layer or multi-layer composite film bags with BOPP, PE, and other base materials. The bag-making machine includes a bag-making and welding device for zipper stand-up pouch making. The bag-making and welding device of the zipper stand-up pouch making machine welds the zipper material separately to the upper bag body material and the lower bag body material. Then, the two pieces of bag body material with zippers are longitudinally welded together. The bottom material is placed in front of the upper bag body material and the lower bag body material and on the opposite side of the zipper material. The bottom material is welded and fixed to the upper bag body material and the lower bag body material by the welding device. Finally, the cutting device cuts the whole material into individual zipper stand-up pouches.

[0003] Currently, some bag-making welding devices used in zipper stand-up pouch making machines place the bottom material welding unit downstream of the zipper material welding unit. When producing stand-up pouches, because the bottom material is not pre-fixed to the upper and lower bag body materials, relative displacement between the bag body material and the bottom material is likely to occur during the zipper welding process. This leads to problems such as zipper welding position deviation, bag body material wrinkles, and displacement of the upper and lower bag body materials. Furthermore, during subsequent bottom welding, material misalignment or poor adhesion may occur, and problems such as incomplete welding and false welding are prone to occur, affecting the sealing performance and structural stability of the stand-up pouch, resulting in a reduction in the production quality and efficiency of stand-up pouches.

[0004] Therefore, there is an urgent need for a bag-making and welding device for zipper stand-up pouch making machines, which can solve the problem of relative displacement caused by the lack of pre-fixation between the bag bottom material and the bag body material, resulting in welding defects, and improve the production quality and efficiency of the products. Utility Model Content

[0005] The purpose of this utility model is to provide a bag-making and welding device for a zipper stand-up pouch making machine, which can solve the problem of welding defects caused by the relative displacement of the bag bottom material and bag body material due to the lack of pre-fixation, thereby improving the production quality and efficiency of the product.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] A bag-making welding device for a zipper stand-up pouch making machine is used to weld bag material components of a stand-up pouch to be formed. The bag material components include an upper bag body material, a lower bag body material, a zipper material, and a bottom bag material. The upper bag body material covers the lower bag body material, and the zipper material and the bottom bag material are located on opposite sides between them. The bag-making welding device for the zipper stand-up pouch making machine includes:

[0008] A bag bottom pre-welding unit is disposed above the bag bottom material. The bag bottom pre-welding unit is used to pre-weld the bag bottom material to the upper bag body material and the lower bag body material respectively.

[0009] A zipper welding unit is located downstream and / or parallel to the bag bottom pre-welding unit, and is also located above the zipper material. The zipper welding unit is used to weld the zipper material to the upper bag body material and the lower bag body material respectively.

[0010] A bottom welding unit is located downstream of the zipper welding unit and above the bottom material of the bag. The bottom welding unit is used to weld the bottom material of the bag to the upper body material and the lower body material respectively.

[0011] As an optional solution for the bag welding device of the zipper stand-up pouch making machine, the bag bottom pre-welding unit includes a first pre-welding component, which is located upstream of the zipper welding unit and above the bag bottom material.

[0012] As an optional solution for the bag-making welding device of the zipper stand-up pouch making machine, the first pre-welding component is the first heat-sealing knife.

[0013] As an optional solution for the bag making and welding device for the zipper stand-up pouch making machine, the bag bottom pre-welding unit further includes a second pre-welding component. The second pre-welding component and the zipper welding unit are respectively disposed on both sides of the bag material component along its traveling direction, and the second pre-welding component is disposed above the bag bottom material.

[0014] As an optional solution for the bag-making welding device of the zipper stand-up pouch making machine, the second pre-welding component is a second heat-sealing knife.

[0015] As an optional solution for the bag making and welding device for the zipper stand-up pouch making machine, the bag making and welding device for the zipper stand-up pouch making machine also includes a feeding component, which is pressed onto the arranged bag material assembly, and the bag material assembly can move from below the feeding component.

[0016] As an optional solution for the bag making and welding device for the zipper stand-up pouch making machine, the bag making and welding device for the zipper stand-up pouch making machine also includes a punching unit. The punching unit is located above the bottom material of the bag and upstream of the bottom pre-welding unit. The bottom pre-welding unit can perform pre-welding operations at the punched holes after the punching unit has been activated.

[0017] As an optional solution for the bag making and welding device for the zipper stand-up pouch making machine, the bag making and welding device for the zipper stand-up pouch making machine further includes a tensioning component, which is located upstream of the welding unit and downstream of the zipper welding unit, and is used to tension the bag material assembly.

[0018] As an optional solution for the bag-making and welding device of the zipper stand-up pouch making machine, the tensioning assembly includes a first upper pressing member, a first transition member, and a second transition member. The first transition member and the second transition member are arranged parallel to each other along the travel direction of the bag material assembly. The first upper pressing member is parallel to both the first and second transition members and is disposed between them. The first upper pressing member is disposed below the first and second transition members. The first and second transition members are disposed below the bag material assembly, and the first upper pressing member is disposed above the bag material assembly.

[0019] A stand-up pouch making machine includes a machine body and a welding device for making zipper stand-up pouches, the welding device being mounted on the machine body.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model proposes a bag-making and welding device for a zipper stand-up pouch making machine. A bottom pre-welding unit is positioned above the bottom material, used to pre-weld the bottom material to the upper and lower bag body materials respectively. A zipper welding unit is positioned downstream and / or parallel to the bottom pre-welding unit, also above the zipper material, used to weld the zipper material to the upper and lower bag body materials respectively. A bottom welding unit is positioned downstream of the zipper welding unit, above the bottom material, used to weld the bottom material to the upper and lower bag body materials respectively. The bottom pre-welding unit first initially fixes the bottom material to the upper and lower bag body materials, then performs zipper welding downstream of it, or simultaneously performs zipper welding with the pre-welding unit in a parallel position. This pre-welding forms a basic connection, effectively restricting material flow. The relative movement during subsequent conveying and welding ensures precise alignment and tight bonding of each layer of material during formal welding. This effectively avoids welding defects caused by relative displacement due to unfixed bottom and body materials, improving product quality and efficiency. Ultimately, it enhances bag-making precision, reduces defective products, and strengthens the overall sealing, durability, and production efficiency of the bags. Pre-welding also eliminates some air between materials in advance, preventing air bubbles from forming during formal welding due to heat expansion, thus ensuring the integrity of the weld surface. The downstream or parallel layout of the zipper welding unit and the pre-welding unit allows for simultaneous or orderly welding of the zipper and bag body based on pre-fixation, reducing interference between processes and making the overall welding process smoother. This not only increases bag-making speed but also strengthens the durability of the bottom structure through double protection, reducing product scrap rates caused by bottom problems and achieving improvements in product quality and production efficiency. Attached Figure Description

[0022] Figure 1 This is a first structural schematic diagram of the bag-making and welding device for a zipper stand-up pouch making machine provided in this embodiment of the present invention;

[0023] Figure 2 This is a second structural schematic diagram of the bag-making and welding device for a zipper stand-up pouch making machine provided in this embodiment of the present invention;

[0024] Figure 3 This is a third structural schematic diagram of the bag-making and welding device for a zipper stand-up pouch making machine provided in this embodiment of the present invention.

[0025] In the picture:

[0026] 1. Bag bottom pre-welding unit; 11. First pre-welding assembly; 12. Second pre-welding assembly;

[0027] 2. Zipper welding unit; 3. Bag bottom welding unit; 4. Feeding component; 5. Perforation unit;

[0028] 6. Tensioning assembly; 61. First upper pressure component; 62. First transition component; 63. Second transition component. Detailed Implementation

[0029] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] This embodiment provides a bag-making welding device for a zipper stand-up pouch making machine. This device is used to weld the bag material components of the stand-up pouch to be formed. The bag material components include an upper bag body material, a lower bag body material, a zipper material, and a bottom bag material. The upper bag body material overlaps the lower bag body material, and the zipper material and the bottom bag material are located on opposite sides between them. Figures 1-3 As shown, in this embodiment, the bag-making and welding device for the zipper stand-up pouch making machine includes a bottom welding unit 3, a zipper welding unit 2, and a bottom pre-welding unit 3. The bottom pre-welding unit 1 is positioned above the bottom material and is used to pre-weld the bottom material to the upper and lower bag body materials respectively. The zipper welding unit 2 is positioned downstream and / or parallel to the bottom pre-welding unit 1, and is also positioned above the zipper material. The zipper welding unit 2 is used to weld the zipper material to the upper and lower bag body materials respectively. The bottom welding unit 3 is positioned downstream of the zipper welding unit 2, and is positioned above the bottom material. The bottom welding unit 3 is used to weld the bottom material to the upper and lower bag body materials respectively. The bottom pre-welding unit 1 first pre-fixes the bottom material to the upper and lower bag body materials, and then performs zipper welding downstream of it, or performs zipper welding simultaneously with the pre-welding unit in a parallel position. Pre-welding forms a basic connection, effectively limiting the relative movement of materials during subsequent conveying and welding processes. This ensures precise alignment and tight bonding of each layer of material during formal welding, effectively preventing welding defects caused by relative displacement due to unfixed bottom and body materials. This improves product quality and production efficiency, ultimately enhancing bag-making precision, reducing defective products, and strengthening the overall sealing, strength, and production efficiency of the bag. Pre-welding also eliminates some air between materials in advance, preventing air bubbles from forming due to heat expansion during formal welding, thus ensuring the integrity of the weld surface. The downstream or parallel layout of the zipper welding unit 2 and the pre-welding unit allows for simultaneous or orderly welding of the zipper to the bag body based on pre-fixation, reducing interference between processes and making the overall welding process smoother. This not only increases bag-making speed but also strengthens the bottom structure through double protection, reducing product scrap rates caused by bottom problems and achieving improvements in product quality and production efficiency.

[0035] Preferably, such as Figures 1-2As shown, in this embodiment, the bag bottom pre-welding unit 1 includes a first pre-welding component 11, which is located upstream of the zipper welding unit 2. The first pre-welding component 11 is positioned above the bag bottom material, enabling the bag bottom material to be preliminarily fixed to the upper and lower bag body materials before zipper welding. By setting the first pre-welding component 11 to form a basic connection in advance, the relative movement of materials in the subsequent zipper welding and conveying stages can be restricted, ensuring that each layer of material is accurately aligned and tightly fitted during zipper welding, avoiding welding defects caused by material displacement. At the same time, the first pre-welding component 11 can also eliminate some air in advance, preventing gas expansion and bubble generation during subsequent welding, ensuring the integrity of the weld surface. Furthermore, upstream pre-welding lays a stable foundation for downstream processes, reducing interference in each stage, and improving overall bag making precision, product quality, and production efficiency.

[0036] Optionally, in this embodiment, the first pre-welding component 11 is a first heat-sealing knife, which can pre-weld the bottom material to the upper and lower bag body materials respectively through heat sealing, realizing the initial fixed connection between the bottom material and the upper and lower bag body materials. The heat sealing process can quickly form a stable basic connection, effectively restricting the relative movement of materials in subsequent conveying and zipper welding stages, ensuring that each layer of materials is accurately aligned in subsequent processes. At the same time, the heat sealing process can expel some air between materials in advance, avoiding the generation of bubbles due to gas expansion when heated during formal welding, ensuring the integrity of the weld surface. Moreover, the first heat-sealing knife is located upstream of the zipper welding unit 2, completing the pre-fixation before zipper welding, laying the foundation for downstream processes. The bottom pre-welding unit 1 also includes a second pre-welding component 12. The second pre-welding component 12 and the zipper welding unit 2 are respectively arranged on both sides of the bag material component along its travel direction. The second pre-welding component 12 is arranged above the bottom material to stabilize the foundation, reduce interference in each stage, and further improve bag making accuracy, product quality and production efficiency. In other embodiments, the first pre-welding component 11 may also be a first ultrasonic pre-welding component or a first pulse pre-welding component, etc.

[0037] like Figure 1 and Figure 3 As shown, in some embodiments, the bag bottom pre-welding unit 1 includes a second pre-welding component 12. The second pre-welding component 12 and the zipper welding unit 2 are respectively disposed on both sides of the bag material assembly along its traveling direction. The second pre-welding component 12 is disposed above the bag bottom material, so that the welding of the zipper material to the upper and lower bag body materials is completed at the same time as the pre-welding of the bag bottom material to the upper and lower bag body materials. This can further optimize the synchronization of the welding process, reduce the process interval, and improve the overall welding efficiency. The synchronous pre-fixing on both sides can more comprehensively restrict the relative movement of the materials of each layer of the bag material assembly, further ensure the material alignment accuracy when the bag bottom welding unit 3 is formally welded, reduce welding defects caused by material offset, enhance the stability and sealing of the bag structure, and thus improve product quality and production efficiency.

[0038] Optionally, in this embodiment, the second pre-welding component 12 is a second heat-sealing knife. The second heat-sealing knife can pre-weld the bottom material of the bag to the upper and lower bag body materials through heat sealing. The heat-sealing pre-welding can quickly form a stable preliminary connection, enhance the restriction effect on the relative movement of materials, and further ensure the material alignment accuracy during subsequent formal welding. The heat sealing process is mature and easy to operate, and can work efficiently with the zipper welding unit 2. On the basis of simultaneously completing the pre-fixation of both sides and the welding of the zipper, it improves the reliability of pre-welding and reduces material displacement problems caused by weak pre-welding. In other embodiments, the second pre-welding component 12 can also be a second ultrasonic pre-welding component or a second pulse pre-welding component, etc.

[0039] like Figure 1 As shown, in some embodiments, the bag bottom pre-welding unit 1 includes both a first pre-welding assembly 11 and a second pre-welding assembly 12.

[0040] Preferably, such as Figures 1-3 As shown in this embodiment, the bag making and welding device for the zipper stand-up pouch making machine also includes a feeding component 4. The feeding component 4 is pressed onto the arranged bag material components, which can move from below the feeding component 4. The feeding component 4 can form a stable clamp and limit on the bag material components in the initial stage of conveying, which can further ensure that the upper bag body material, lower bag body material, zipper material and bottom material maintain a precise relative position before entering the subsequent welding unit, avoiding deviation due to vibration, friction and other factors during conveying, providing a more reliable foundation for the initial fixation of the bag bottom pre-welding unit 1, reducing welding defects caused by material misalignment in the pre-welding and subsequent welding stages, and at the same time, stable clamping and conveying can make the bag material components move more smoothly, improve the continuity and stability of the overall production process, and further improve bag making accuracy and production efficiency.

[0041] Optionally, such as Figures 1-3 As shown, in this embodiment, the feed element 4 is a first rotating shaft. When the bag assembly moves under the first rotating shaft, the rotational characteristics of the shaft can transform the original sliding friction into rolling friction, significantly reducing wear and scratches on the surface of the bag assembly and protecting the integrity of the material. The continuous rotation of the first rotating shaft can form a synchronous drive with the movement of the bag assembly, ensuring a stable and consistent conveying speed and avoiding material wrinkles or displacement due to uneven conveying force. This further enhances the clamping and limiting effect on the multi-layer bag assembly, providing a more reliable pre-operation guarantee for the precise operation of subsequent welding units. This improves the smoothness of material conveying and reduces quality risks caused by friction or unstable conveying, contributing to a dual improvement in production efficiency and product quality. In other embodiments, the feed element 4 can also be a pressure plate or an elastic pressure roller, etc.

[0042] Preferably, such as Figures 1-3As shown, in this embodiment, the bag-making and welding device for the zipper stand-up pouch making machine also includes a punching unit 5. The punching unit 5 is located above the bottom material of the bag and upstream of the bottom pre-welding unit 1. The pre-welding unit can perform pre-welding operations at the punched area after the punching unit 5 has been activated. Through pre-welding, the bottom material of the bag at the punched area is tightly connected to the upper and lower bag body materials, avoiding relative displacement of the punched material during subsequent conveying and welding due to the presence of holes. This ensures the stability of the punching position and the precise alignment of each layer of material. At the same time, pre-welding can seal the gaps around the punched area, preventing welding defects caused by loosening or misalignment of the material around the hole during formal welding. This not only ensures the effectiveness of the punching function but also strengthens the structural strength and sealing of the punched area, further improving product quality and production stability.

[0043] Optionally, in this embodiment, the punching unit 5 is a stamping punching die, which is a cylindrical structure with a pointed bottom. The stamping punching die can precisely puncture and punch holes in the bag bottom material, forming regular circular or cylindrical holes. The pointed bottom design allows for easy penetration of the bag bottom material, reducing pulling and damage to the material during punching and preventing tearing or deformation of the bag bottom material. The cylindrical structure ensures smooth edges and uniform size of the punched holes, providing a stable foundation for precise operation of the subsequent pre-welding unit at the punching location, further improving punching quality and consistency, thereby enhancing the sealing and firmness of subsequent welding, and reducing material loss and product defect rate caused by improper punching. In other embodiments, the punching unit 5 can also be a laser punching device or an ultrasonic punching device, etc.

[0044] Specifically, such as Figures 1-3 As shown in this embodiment, the bag-making welding device for the zipper stand-up pouch making machine also includes a tensioning component 6. The tensioning component 6 is located upstream of the welding unit and downstream of the zipper welding unit 2. The tensioning component 6 is used to tension the bag material assembly. Tensing the bag material assembly upstream of the welding unit can eliminate material wrinkles and looseness, ensuring that the bag material entering the welding process is flat and that each layer of material is tightly bonded, providing a stable foundation for subsequent welding and avoiding welding misalignment or incomplete welds caused by material looseness. Tensing downstream of the zipper welding unit 2 can further maintain the tension stability of the bag material after zipper welding, preventing the partially welded bag material from shifting or deforming in subsequent conveying and bottom welding processes, ensuring the material alignment accuracy of each welding stage, reducing welding defects caused by material movement, and ensuring that the material is evenly stressed under tension, making it easier to transmit welding pressure to each contact point, improving the consistency and strength of the weld, and ultimately further improving bag-making accuracy, product quality and production efficiency, and reducing the defect rate.

[0045] Preferably, such as Figures 1-3As shown, in this embodiment, the tensioning assembly 6 includes a first upper pressing member 61, a first transition member 62, and a second transition member 63. The first transition member 62 and the second transition member 63 are arranged parallel to each other along the traveling direction of the bag assembly. The first upper pressing member 61 is parallel to both the first transition member 62 and the second transition member 63, and is disposed between the first transition member 62 and the second transition member 63. The first upper pressing member 61 is disposed below the first transition member 62 and the second transition member 63. The first transition member 62 and the second transition member 63 are disposed below the bag assembly, and the first upper pressing member 61 is disposed above the bag assembly. The tensioning assembly 6 is parallelly supported below the bag assembly by the first transition member 62 and the second transition member 63, and cooperates with the first upper pressing member 61 located between them and above the bag assembly. 1. An upper and lower clamping structure is formed. When the bag material assembly is conveyed along the travel direction, the first upper pressing component 61 and the two transition components together form a bidirectional tension force on the material, which can effectively eliminate material wrinkles and looseness, ensure that the bag material assembly remains flat and smooth during the conveying process, further enhance the relative positional stability of each layer of material, and avoid welding misalignment caused by material stacking and offset. At the same time, the stable tension state can reduce the tensile deformation of the material during welding. Combined with the preliminary fixation of pre-welding and subsequent welding processes, each welding unit is welded on the basis of precisely aligned materials, further improving the tightness and consistency of the welding surface, reducing defects such as bubbles and incomplete welds, ensuring welding quality, reducing conveying jams caused by unstable material conditions, and improving the overall production smoothness and efficiency.

[0046] Optionally, such as Figures 1-3 As shown, in this embodiment, the first upper pressing member 61, the first transition member 62, and the second transition member 63 are all second rotating shaft structures. While forming an upper and lower clamping tension on the bag material assembly, they can convert the sliding friction during material conveying into rolling friction, significantly reducing wear and tear damage to the surface of the bag material assembly, and preventing wrinkles or displacement of the material due to friction. At the same time, the rotating shaft structure can rotate synchronously with the material movement, ensuring that the tension force is uniform and continuously applied to the material, maintaining the flatness and precise alignment of each layer of material during conveying and welding, further reducing material displacement caused by uneven frictional resistance. Combined with the overall structure of the tensioning component 6, it not only enhances the stability of the tensioning effect but also reduces material loss, ensuring the good condition of the bag material assembly in each welding process, thereby improving welding quality and production efficiency. In other embodiments, the first upper pressing member 61, the first transition member 62, and the second transition member 63 can also be a combination structure of pneumatic telescopic pressing blocks and fixed transition blocks or a roller assembly structure, etc.

[0047] Optionally, in this embodiment, the zipper welding unit 2 is a third heat-sealing knife, which can precisely weld the zipper material to the upper and lower bag body materials. Because the third heat-sealing knife provides stable heating and pressure, it ensures a firm weld and good seal between the zipper and the bag body material. Combined with the pre-welded base at the bottom of the bag, it further prevents material displacement during welding, improves welding quality and efficiency, strengthens the sealing and overall robustness of the stand-up pouch, and reduces defective products. In other embodiments, the zipper welding unit 2 can also be a first high-frequency heat sealing machine or a first heat-sealing roller assembly, etc.

[0048] Optionally, in this embodiment, the bottom welding unit 3 is a fourth heat-sealing knife. After the zipper welding unit 2 completes the welding of the zipper material to the upper and lower bag body materials, the fourth heat-sealing knife further welds the bottom material to the upper and lower bag body materials. The fourth heat-sealing knife can also achieve a more robust and tight formal weld through the heat-sealing action of the heat-sealing knife on the basis of the initial fixation of the bottom pre-welding unit 1, further strengthening the robustness and sealing of the bottom structure. Simultaneously, the precise heating characteristics of the heat-sealing knife ensure that the weld surface is complete and bubble-free, reducing product scrap due to weak bottom welding or poor sealing. Combined with the pre-welding and zipper welding stages, it makes the overall welding process smoother, improving bag manufacturing quality and production efficiency. In other embodiments, the bottom welding unit 3 can also be a first laser welding assembly or a third pulse welding unit, etc.

[0049] Preferably, such as Figures 1-3 As shown in this embodiment, the bag-making and welding device for the zipper stand-up pouch making machine includes two bag bottom pre-welding units 1, zipper welding units 2, and bag bottom welding units 3 arranged symmetrically with the central axis of the bag material assembly as the axis of symmetry. The central axis of the bag material assembly extends along the forward direction of the bag material assembly. During the movement of the bag material assembly, the bag bottom pre-welding, zipper welding, and bag bottom welding processes of one stand-up pouch can be completed independently on both sides of the central axis. Thus, two stand-up pouches can be produced simultaneously. While ensuring the welding accuracy and quality consistency on both sides, the production efficiency is directly doubled. Without adding too much equipment space and operating steps, twice the number of products can be produced in the same amount of time. At the same time, due to the stability of the symmetrical operation on both sides, problems such as uneven material stress on one side that may occur during single production can be avoided, further reducing the defect rate and taking into account both high-efficiency production and high-quality output.

[0050] This embodiment also provides a stand-up pouch making machine. In this embodiment, the stand-up pouch making machine includes a machine body and a bag-making and welding device for zipper stand-up pouches. The bag-making and welding device is installed on the machine body. By integrating the aforementioned bag-making and welding device, the stand-up pouch making machine can achieve automated and high-precision bag-making processing of zipper stand-up pouches. Its advantages are that, through the orderly or parallel operation of bag bottom pre-welding, zipper welding, and bag bottom welding, pre-welding can ensure precise alignment of materials in subsequent stages, reduce relative movement, and avoid welding defects. It also improves production efficiency through process optimization, while ensuring complete weld surfaces and strong connections between parts, enhancing bag sealing and overall quality, reducing defect rates, and achieving a dual improvement in product quality and production efficiency.

[0051] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A bag-making welding device for a zipper stand-up pouch making machine, used for welding bag material components of a stand-up pouch to be formed, the bag material components including an upper bag body material, a lower bag body material, a zipper material, and a bottom bag material, wherein the upper bag body material covers the lower bag body material, and the zipper material and the bottom bag material are respectively located on two sides between them, characterized in that, The bag-making and welding device used in zipper stand-up pouch making machines includes: A bag bottom pre-welding unit (1) is disposed above the bag bottom material. The bag bottom pre-welding unit (1) is used to pre-weld the bag bottom material to the upper bag body material and the lower bag body material respectively. Zipper welding unit (2), the zipper welding unit (2) is located downstream and / or parallel to the bag bottom pre-welding unit (1), the zipper welding unit (2) is also located above the zipper material, the zipper welding unit (2) is used to weld the zipper material to the upper bag body material and the lower bag body material respectively; The bottom welding unit (3) is located downstream of the zipper welding unit (2) and above the bottom material. The bottom welding unit (3) is used to weld the bottom material to the upper body material and the lower body material respectively.

2. The bag-making and welding device for a zipper stand-up pouch making machine according to claim 1, characterized in that, The bag bottom pre-welding unit (1) includes a first pre-welding component (11), which is located upstream of the zipper welding unit (2) and is positioned above the bag bottom material.

3. The bag-making and welding device for a zipper stand-up pouch making machine according to claim 2, characterized in that, The first pre-welded component (11) is the first heat sealing knife.

4. The bag-making and welding device for a zipper stand-up pouch making machine according to claim 1, characterized in that, The bag bottom pre-welding unit (1) further includes a second pre-welding component (12), the second pre-welding component (12) and the zipper welding unit (2) are respectively disposed on both sides of the bag material component along its traveling direction, and the second pre-welding component (12) is disposed above the bag bottom material.

5. The bag-making and welding device for a zipper stand-up pouch making machine according to claim 4, characterized in that, The second pre-welded component (12) is the second heat sealing knife.

6. The bag-making and welding device for a zipper stand-up pouch making machine according to any one of claims 1-5, characterized in that, The bag making and welding device for the zipper stand-up pouch making machine also includes a feeding component (4), which is pressed onto the arranged bag material assembly, and the bag material assembly can move from below the feeding component (4).

7. The bag-making and welding device for a zipper stand-up pouch making machine according to any one of claims 1-5, characterized in that, The bag making and welding device for the zipper stand-up pouch making machine also includes a punching unit (5), which is located above the bottom material of the bag and upstream of the bottom pre-welding unit (1). The bottom pre-welding unit (1) can perform pre-welding operation at the punching point after the punching unit (5) has been activated.

8. The bag-making and welding device for a zipper stand-up pouch making machine according to any one of claims 1-5, characterized in that, The bag-making and welding device for the zipper stand-up pouch making machine further includes a tensioning component (6), which is located upstream of the welding unit and downstream of the zipper welding unit (2). The tensioning component (6) is used to tension the bag material assembly.

9. The bag-making and welding device for a zipper stand-up pouch making machine according to claim 8, characterized in that, The tensioning assembly (6) includes a first upper pressing member (61), a first transition member (62), and a second transition member (63). The first transition member (62) and the second transition member (63) are arranged parallel to each other along the traveling direction of the bag assembly. The first upper pressing member (61) is parallel to both the first transition member (62) and the second transition member (63) and is disposed between the first transition member (62) and the second transition member (63). The first upper pressing member (61) is disposed below the first transition member (62) and the second transition member (63). The first transition member (62) and the second transition member (63) are disposed below the bag assembly, and the first upper pressing member (61) is disposed above the bag assembly.

10. A stand-up pouch making machine, characterized in that, The invention includes a bag-making machine body and a bag-making and welding device for a zipper stand-up pouch making machine as described in any one of claims 1-9, wherein the bag-making and welding device for the zipper stand-up pouch making machine is mounted on the bag-making machine body.

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