Bag making equipment

Abstract

This invention discloses a bag-making device, comprising a bag forming assembly and a bag folding assembly. The inlet end of the bag folding assembly and the outlet end of the bag forming assembly are aligned in a first direction. A three-dimensional bag from the bag forming assembly directly enters the bag folding assembly along the first direction. The entire bag-making process—from sheet material entering the bag sealing assembly to be formed into a three-dimensional bag, and then being conveyed to the bag folding assembly to be folded into a flat bag—is completed continuously in the same direction and posture. The bag remains in a fixed path and spatial posture throughout the entire process without turning or flipping, avoiding positional deviations, angular shifts, and bag torsion caused by process transitions, direction changes, or multiple positioning. Each bag experiences consistent stress and movement trajectory during sealing, forming, and folding / flattening processes, improving the consistency of the overall state of each bag in mass production and thus enhancing the overall quality of batch orders.

Description

Technical Field

[0001] This invention relates to the field of packaging bag manufacturing technology, and in particular to a bag-making device. Background Technology

[0002] In the manufacturing process of packaging bags, bag-making equipment is used to process sheet materials into bag bodies of a predetermined shape. The sheet materials can be paper, plastic film, non-woven fabric, composite materials, or other materials suitable for making bag bodies. After forming, the bag body usually needs to undergo a folding process to achieve the final product form. For example, in the production of various packaging bags such as garbage bags, shopping bags, and food packaging bags, the three-dimensionally formed bag body often needs to have its side walls bent inwards to create a more compact, flat structure, facilitating subsequent packing and transportation processes.

[0003] In existing bag-making equipment, after the bag forming assembly shapes the sheet material into a stand-up pouch, it typically needs to be transported to the folding station via a turning, flipping, or transfer mechanism. During the turning, flipping, or transfer process, the spatial posture of the bag changes, easily leading to positional shifts, angular deflections, or twisting, resulting in differences in the state of each bag upon entering the folding station. These differences accumulate in subsequent folding processes, leading to poor consistency in the folded state of bags produced in batches, affecting the overall quality of bulk orders. In particular, existing bag-making equipment often involves multiple process transitions between bag forming and folding, and the varying positioning accuracy between these processes further exacerbates the differences in the state of individual bags. This difference becomes more pronounced at higher equipment operating speeds, leading to an increased defect rate.

[0004] Therefore, existing bag-making equipment suffers from poor consistency in the overall state of each bag during mass production, resulting in low overall quality of bulk bag orders. Summary of the Invention

[0005] The purpose of this application is to solve the problem that existing bag-making equipment has poor consistency in the overall state of each bag during mass production, resulting in low overall quality of batch bag orders.

[0006] To achieve the above objectives, this application provides a bag-making apparatus, which includes a bag forming assembly and a bag folding assembly. The bag forming assembly receives sheet material and forms the received sheet material into a three-dimensional bag. The bag folding assembly is located downstream of the bag forming assembly, receives the three-dimensional bag from the bag forming assembly, and folds the bag body of the three-dimensional bag into a flat shape. Furthermore, the inlet end of the bag folding assembly is aligned with the outlet end of the bag forming assembly in a first direction, and the three-dimensional bag from the bag forming assembly enters the bag folding assembly along the first direction. The bag forming path in the bag forming assembly and the bag folding path in the bag folding assembly both extend along the first direction, and the center portions of the bag forming path and the bag folding path are aligned with each other in the first direction.

[0007] Using the above technical solution, the inlet end of the bag folding assembly and the outlet end of the bag forming assembly in the bag making equipment are aligned in the first direction. The three-dimensional bag from the bag forming assembly directly enters the bag folding assembly along the first direction. The entire bag making process, from the sheet material entering the bag sealing assembly to being formed into a three-dimensional bag and then being conveyed to the bag folding assembly to be folded into a flat bag, is completed continuously in the same direction and posture. The bag remains in a fixed path and spatial posture throughout the entire process without turning or flipping, avoiding positional deviations, angular offsets, and bag torsion caused by process transitions, direction changes, or multiple positioning. The stress state, movement trajectory, forming, and folding method of each bag are consistent during the sealing, forming, and flattening processes, which can improve the consistency of the overall state of each bag in mass production, thereby improving the overall quality of batch orders of bag making machines. Especially for easily deformable aluminum-plastic composite film bags or thin plastic film bags (e.g., less than 50μm), existing technologies require turning or flipping, which alters the inertial forces acting on different parts of the bag, easily leading to irreversible deformation. In this application, however, the bags maintain the same posture throughout, with each bag following a consistent trajectory, preventing wrinkles or shifts during transport and resulting in better overall bag quality. Furthermore, the bag folding and forming components of this bag-making equipment are arranged in the same direction, occupying less space and making it more suitable for spaces with limited capacity.

[0008] Furthermore, since the bag forming path and the bag folding path extend in the same direction, and the centers of the bag forming path and the bag folding path are aligned with each other in the first direction, the direction of the conveying force on each part of the bag remains consistent during the transport between processes. This helps reduce the twisting or offset of the bag due to changes in the direction of force, resulting in more precise conveying posture. Especially for bags that are thin or made of soft materials, maintaining the continuity of the conveying force direction helps prevent the bag from wrinkling or deforming. Moreover, the bag making equipment provided in this application does not require a turning or flipping mechanism, which helps simplify the equipment structure, reduce the equipment floor space, and reduce the possibility of damage to the bag during turning or flipping.

[0009] According to the bag-making equipment provided in this application, a bag alignment part is further provided between the inlet end of the bag folding assembly and the outlet end of the bag forming assembly. The bag alignment part extends along a first direction, the inlet end is adapted and aligned with the outlet end of the bag forming assembly in the first direction, and the outlet end is adapted and aligned with the inlet end of the bag folding assembly in the first direction. The three-dimensional bag from the bag forming assembly enters the bag alignment part along the first direction, is aligned by the bag alignment part, and enters the bag folding assembly after the bottom center of the three-dimensional bag is aligned with the center of the inlet end of the bag folding path.

[0010] Using the above technical solution, a bag alignment portion is provided between the inlet end of the bag folding assembly and the outlet end of the bag forming assembly. This alignment portion extends along a first direction, ensuring that the guiding force on the three-dimensional bag during alignment is consistent with the first direction, thus helping to reduce displacement or twisting of the bag due to lateral forces. Especially for easily deformable materials such as aluminum-plastic composite film bags, a uniform distribution of guiding force helps prevent deformation caused by excessive localized stress. Furthermore, the inlet end of the bag alignment portion is adapted and connected to the outlet end of the bag forming assembly, and the outlet end is adapted and connected to the inlet end of the bag folding assembly, allowing the bag to smoothly enter the folding assembly after alignment, reducing the possibility of jamming or displacement of the bag during process transitions.

[0011] According to the bag-making equipment provided in this application, the alignment of the bag body alignment part with the three-dimensional bag includes aligning the bottom edge of the three-dimensional bag with the corresponding edge of the inlet end of the bag body folding assembly at the outlet end of the bag body channel of the bag body alignment part in a second direction; the second direction is perpendicular to the first direction, and the bag body folding assembly folds the bag body of the three-dimensional bag along the second direction.

[0012] By adopting the above technical solution, the bag alignment part aligns the bottom edge of the 3D bag with the corresponding edge of the inlet end of the bag folding assembly along the second direction at the outlet end of the bag channel. This allows the bag to enter the inlet end of the bag folding assembly more smoothly, and production will not be interrupted due to the interference between the bottom edge of the 3D bag and the corresponding edge of the inlet end of the bag folding assembly. Furthermore, the bag folding assembly folds the 3D bag along the second direction perpendicular to the first direction, which makes the force on the 3D bag more accurate when it is pressed and folded, resulting in a better folding effect.

[0013] According to the bag-making equipment provided in this application, the alignment of the bag body channel with the three-dimensional bag further includes aligning the bottom edge of the three-dimensional bag with the corresponding edge of the inlet end of the bag body folding assembly at the outlet end of the bag body channel in a third direction; wherein the third direction is perpendicular to the first direction and the second direction.

[0014] By employing the above technical solution, the bag alignment part can align the 3D bag in two mutually perpendicular directions (the second direction and the third direction), ensuring that the bottom of the 3D bag is accurately aligned with the entrance end of the bag folding assembly in a two-dimensional plane. This further improves the consistency of the initial state of each bag when entering the folding process. In use, the bag alignment part aligns the bottom of the 3D bag in the third direction, resulting in a more uniform folding force on all parts of the bag bottom when entering the folding assembly. This helps avoid uneven folding caused by bottom position deviations. For thin plastic film bags, a uniform folding force distribution helps prevent stress concentration and breakage in localized areas. Furthermore, alignment in two mutually perpendicular directions allows for more accurate correction of positional deviations in the 3D bag, further improving the consistency of folding quality for each bag during mass production.

[0015] According to the bag-making equipment provided in this application, the bag body alignment portion includes a bag body alignment path extending in a first direction within the bag body channel; and the dimension of the other end of the bag body alignment path near the bag body forming assembly in the second direction is greater than or equal to the dimension of the bottom of the three-dimensional bag in the second direction; and the dimension of the one end of the bag body alignment path near the bag body folding assembly in the second direction is less than or equal to the dimension of the bottom of the three-dimensional bag in the second direction, and the dimension in the third direction is equal to the dimension of the bottom of the three-dimensional bag in the third direction.

[0016] By employing the above technical solution, the inlet dimension of the bag alignment path is greater than or equal to the bottom dimension of the 3D bag, and the outlet dimension is less than or equal to the bottom dimension of the 3D bag. This allows the 3D bag to gradually adjust its position within the alignment path, facilitating automatic alignment. During use, because the dimensions of the alignment path gradually decrease from the inlet to the outlet, the lateral guiding force on the 3D bag gradually increases as it passes through the alignment path, resulting in a smooth alignment process. This gradually increasing guiding force helps prevent deformation or displacement of the bag due to sudden lateral forces. For easily deformable materials such as aluminum-plastic composite film bags, the smooth alignment process helps protect the bag from damage. Furthermore, the automatic position adjustment of the bag during travel eliminates the need for complex alignment mechanisms, simplifying the equipment structure and improving operational reliability.

[0017] According to the bag-making equipment provided in this application, the center portions of the bag forming path, the bag alignment path, and the bag folding path are aligned with each other in a first direction; and the cross-sectional shape of the end of the bag alignment path near the bag folding assembly, taken perpendicular to the first direction, is rectangular.

[0018] By employing the above technical solution, the centers of the bag forming path, bag alignment path, and bag folding path are aligned with each other in the first direction. This alignment ensures that the conveying force on all parts of the bag is more uniform during transitions between paths, helping to reduce twisting or displacement caused by uneven force distribution. For thinner bags, this uniform force distribution helps prevent wrinkles or deformation. Furthermore, the rectangular cross-section of the outlet end of the bag alignment path matches the inlet shape of the bag folding path, allowing the bag to smoothly enter the folding assembly and reducing the possibility of jamming during process transitions.

[0019] According to the bag-making equipment provided in this application, the bag alignment section includes a pair of front positioning portions disposed opposite each other on both sides of the bag alignment path in a second direction, and a pair of side positioning portions disposed opposite each other on both sides of the bag alignment path in a third direction; wherein each front positioning portion and each side positioning portion extends along the first direction.

[0020] Using the above technical solution, the bag alignment part includes a front positioning part and a side positioning part. The front positioning part and the side positioning part limit the three-dimensional bag from two mutually perpendicular directions, so that the guiding force on the three-dimensional bag is more evenly distributed during movement, which helps to reduce the torsion of the bag due to unilateral force. Especially for easily deformable materials such as aluminum-plastic composite film bags, the even distribution of guiding force helps to avoid deformation caused by excessive local force on the bag.

[0021] In addition, by limiting and guiding in two directions, the positional deviation of the three-dimensional bag can be corrected more accurately, which helps to improve the consistency of the alignment of each bag in mass production.

[0022] According to the bag-making equipment provided in this application, a pair of front positioning parts are configured as a pair of front guiding members that extend obliquely from the inlet end of the bag alignment path toward the outlet end, and gradually approach each other relative to a first direction; wherein the oblique angle of each front guiding part relative to the first direction is in the range of 5° to 25°, and the pair of front guiding members are symmetrically arranged in a second direction.

[0023] Using the above technical solution, a pair of front positioning parts are configured as a pair of front guiding components extending obliquely from the inlet end to the outlet end of the bag alignment path, gradually approaching each other relative to the first direction. This allows the guiding force exerted by the two front guiding components on the 3D bag to gradually increase as it passes through, forming a smooth alignment process. This gradually increasing guiding force helps to prevent deformation or displacement of the bag due to sudden lateral forces. Furthermore, the tilt angle of each front guiding component relative to the first direction is adjustable, allowing the bag alignment part to adapt to the alignment requirements of 3D bags of different sizes, thus improving the applicability of the equipment. For larger 3D bags, the tilt angle can be increased; for smaller 3D bags, the tilt angle can be decreased.

[0024] According to the bag-making equipment provided in this application, a pair of side positioning parts are configured as a pair of side guide members that extend obliquely from the inlet end of the bag body alignment path toward the outlet end, and gradually approach each other relative to a first direction; wherein the oblique angle of each side guide part relative to the first direction is in the range of 2° to 15°, and the pair of side guide members are symmetrically arranged in a third direction.

[0025] Using the above technical solution, a pair of side positioning parts are configured as a pair of side guide components extending obliquely from the inlet end to the outlet end of the bag alignment path, gradually approaching each other relative to the first direction. This allows the guiding force exerted by the two side guide components on the 3D bag to gradually increase as it passes through, forming a smooth alignment process. This gradually increasing guiding force helps to prevent deformation or displacement of the bag due to sudden lateral forces. Furthermore, the tilt angle of each side guide component relative to the first direction is adjustable, allowing the bag alignment part to adapt to the alignment requirements of 3D bags of different widths, thus improving the applicability of the equipment. For wider 3D bags, the tilt angle can be increased; for narrower 3D bags, the tilt angle can be decreased.

[0026] According to the bag-making equipment provided in this application, at least one of the pair of front guides has a front dragging part that faces a corresponding side wall toward the three-dimensional bag and can drag the three-dimensional bag along the bag body alignment path; and / or at least one of the pair of side guides has a side dragging part that faces a corresponding side wall toward the three-dimensional bag and can drag the three-dimensional bag along the bag body alignment path.

[0027] By adopting the above technical solution, the front dragging part can drag the three-dimensional bag along the bag alignment path, providing continuous conveying power to the three-dimensional bag, so that the three-dimensional bag can move smoothly during the alignment process, reducing the possibility of the bag stopping or shifting, and helping to improve the stability of the alignment process.

[0028] In addition, the front drag section and the side drag section can be set individually or in combination, allowing the bag alignment section to adapt to different application scenarios. When only the front drag section is set, it is suitable for narrower stand-up pouches; when both the front drag section and the side drag section are set, it is suitable for wider stand-up pouches or those requiring higher conveying stability, making it more versatile.

[0029] According to the bag-making equipment provided in this application, the distance between one end of a pair of front positioning portions near the bag body folding assembly in a second direction is adjustable; and the distance between one end of a pair of side positioning portions near the bag body folding assembly in a third direction is adjustable.

[0030] By adopting the above technical solution, the distance between the ends of a pair of front positioning parts near the bag folding assembly in the second direction is adjustable, and the distance between the ends of a pair of side positioning parts near the bag folding assembly in the third direction is adjustable. This allows the bag alignment part to adapt to the alignment requirements of stand-up pouches of different sizes, thus improving the applicability of the equipment. For larger stand-up pouches, the end distance can be increased; for smaller stand-up pouches, the end distance can be decreased. Furthermore, by adjusting the end distance, the positional accuracy of stand-up pouches of different sizes at the exit end can be made more similar, which helps improve the consistency of the alignment state of bags of different specifications in mass production.

[0031] According to the bag making equipment provided in this application, the bag folding assembly includes a pair of stacking bag components arranged opposite to each other in a second direction, forming a bag folding path extending in a first direction between the pair of stacking bag components, and folding the three-dimensional bag into a flat shape in the second direction; and one end of the pair of stacking bag components near the bag alignment portion serves as the inlet end of the bag folding assembly, and is aligned with the outlet end of the bag alignment path in the first direction.

[0032] Using the above technical solution, the bag folding assembly includes a pair of folding components. These components fold the three-dimensional bag into a flat shape along a second direction, ensuring that the folding force applied by the two folding components is more even during the folding process. This helps reduce wrinkles or deformation caused by uneven stress on the bag. Especially for easily deformable materials such as aluminum-plastic composite film bags, a uniform distribution of folding force helps prevent damage caused by excessive localized stress.

[0033] In addition, the folding path of the bag extends along the first direction, which allows the three-dimensional bag to be continuously conveyed forward during the folding process, which helps to achieve continuous production and improve production efficiency.

[0034] According to the bag-making equipment provided in this application, a pair of bag-stacking components includes a pair of pressing components that are arranged opposite to each other in a second direction and can move opposite to each other or away from each other in the second direction. At least one of the pressing components has a pressing and dragging part that faces a corresponding side wall toward the three-dimensional bag and can drag the three-dimensional bag along the bag folding path. Alternatively, a pair of bag-stacking components includes a pair of squeezing components that extend obliquely from the inlet end of the bag folding path toward the outlet end, relative to the first direction and gradually approach each other. At least one of the squeezing components has a squeezing and dragging part that faces a corresponding side wall toward the three-dimensional bag and can drag the three-dimensional bag along the bag folding path.

[0035] Using the above technical solution, a pair of stacking bag components includes a pair of pressing components. These pressing components can move relative to or away from each other in a second direction, allowing the bag folding assembly to adapt to the folding requirements of stand-up pouches of different thicknesses. The pressing and dragging part can drag the stand-up pouch along the bag folding path, providing continuous conveying power. Furthermore, the point of application of the dragging force applied by the pressing and dragging part to the stand-up pouch is relatively close to the side wall of the stand-up pouch, ensuring that the stand-up pouch maintains its positional stability while being dragged and pressed, thus improving the stability of the folding process. Moreover, the bag can stop during folding; folding can be achieved simply by the relative movement of the pair of stacking bag components.

[0036] According to the bag-making equipment provided in this application, each of a pair of pressing components includes a main pressing component and at least a pair of auxiliary pressing components adjustablely disposed on both sides of the main pressing component in a third direction.

[0037] Using the above technical solution, each of the pair of pressing components includes a main pressing component and an auxiliary pressing component. The position of the main pressing component is fixed, while the position of the auxiliary pressing component can be adjusted according to the width of the folding bag, which helps to ensure that the pressing force on folding bags of different widths is appropriate. In addition, through the cooperation of the main pressing component and the auxiliary pressing component, the pressing force distribution on the folding bag during folding can be more uniform, which helps to improve the consistency of folding quality.

[0038] According to the bag-making equipment provided in this application, the distance between a pair of bag-stacking components in a second direction is adjustable; and a bag-stacking component located on the same side in the second direction and the corresponding end of a corresponding front positioning part are synchronously and adjustablely disposed on the same movable part that can move along the second direction.

[0039] Using the above technical solution, the distance between a pair of folding bag components in the second direction is adjustable, allowing the bag folding assembly to adapt to the folding requirements of stand-up pouches of different thicknesses. A folding bag component located on the same side in the second direction and the corresponding end of a front positioning part are synchronously adjustable and mounted on the same movable part that can move along the second direction. This allows the folding bag component and the front positioning part to be adjusted synchronously, helping to ensure relatively consistent positional accuracy of stand-up pouches of different sizes during the folding and alignment process, and improving the consistency of folding quality for different specifications of bags in mass production.

[0040] According to the bag-making equipment provided in this application, the bag folding assembly further includes a pair of limiting members disposed opposite each other in the third direction; wherein the distance between the pair of limiting members in the third direction is adjustable, and one limiting member located on the same side in the third direction and the corresponding end of the corresponding side positioning part are synchronously and adjustablely disposed on the same auxiliary moving part that can move along the third direction.

[0041] The bag folding assembly, employing the aforementioned technical solution, also includes a pair of limiting components positioned opposite each other in the third direction. These limiting components can limit the positioning of the 3D bag in the third direction, helping to ensure the 3D bag maintains the correct posture during folding. The distance between the pair of limiting components in the third direction is adjustable, allowing the bag folding assembly to adapt to the positioning requirements of 3D bags of different widths. One limiting component located on the same side in the third direction and the corresponding end of a corresponding side positioning part are synchronously adjustable and mounted on the same auxiliary moving part that can move along the third direction. This allows the limiting component and the side positioning part to be adjusted synchronously, helping to ensure relatively consistent positional accuracy of 3D bags of different sizes during folding and alignment.

[0042] According to the bag making equipment provided in this application, a bag reversing component is also provided at the outlet end of the bag folding assembly; wherein, the bag reversing component receives a flat bag extending along a first direction from the outlet end of the bag folding assembly, reverses the orientation of the bag to extend along a second direction and outputs it.

[0043] By employing the above technical solution, the bag reversing assembly can reverse the orientation of a flat bag extending in the first direction and output it in the second direction. This allows the bag to be output in a posture suitable for subsequent processes after folding, facilitating connection with downstream equipment and improving the automation level of the entire production line. Furthermore, the reversing force applied to the flat bag by the bag reversing assembly during the reversing process is relatively stable, making the bag less prone to folding or shifting during the reversing process. For thin plastic film bags, the smooth reversing process helps avoid wrinkles or damage caused by uneven force.

[0044] According to the bag-making equipment provided in this application, the bag reversing assembly includes an arc-shaped channel, the inlet end of the arc-shaped channel is aligned with the outlet end of the bag folding assembly in a first direction, and the outlet end of the arc-shaped channel is open in a second direction.

[0045] Using the above technical solution, the bag reversing assembly adopts an arc-shaped channel structure, ensuring a continuous and smooth reversing process, and reducing the likelihood of bag breakage or displacement during reversal. The arc-shaped channel has a relatively simple structure, lower manufacturing and maintenance costs, and is suitable for industrial applications. Furthermore, the inlet end of the arc-shaped channel is aligned with the first direction, while the outlet end is open along the second direction, allowing the bag to complete the reversal smoothly and reducing the possibility of jamming during the reversal process.

[0046] According to the bag-making equipment provided in this application, the arc-shaped channel is composed of a reversing roller, and a first conveyor belt and a second conveyor belt wound around the outer periphery of the reversing roller; wherein the reversing roller has a small-diameter roller portion located in the middle region and a pair of large-diameter roller portions located at both ends along its axial direction; one side of the first conveyor belt is adapted to engage with one side of the small-diameter roller portion, and the other side extends from the exit end of the arc-shaped channel along a second direction; one side of the second conveyor belt is adapted to engage with one side of the large-diameter roller portion, and the other side extends from the exit end of the arc-shaped channel along the second direction, parallel to and spaced apart from the first conveyor belt; the arc-shaped channel is formed by the stepped space between the small-diameter roller portion and the large-diameter roller portion, and the first conveyor belt and the second conveyor belt together; and the rotational speeds of the first conveyor belt and the second conveyor belt relative to the center of the arc-shaped channel are equal.

[0047] Using the above technical solution, the arc-shaped channel is composed of a reversing roller, a first conveyor belt, and a second conveyor belt, resulting in a compact structure and a small footprint. The first and second conveyor belts rotate at the same speed relative to the center of the arc-shaped channel, ensuring that the inner and outer sides of the bag move at relatively consistent speeds during the reversing process. This helps reduce twisting or breakage of the bag caused by the speed difference between the inner and outer sides.

[0048] In addition, the first and second conveyor belts provide a relatively continuous conveying force to the bag, allowing it to move smoothly during the reversal process and improving its stability. For thin plastic film bags, the smooth conveying process helps prevent wrinkles caused by uneven stress.

[0049] Furthermore, for 3D bags of different thicknesses, only the diameter difference between the small-diameter roller section and the large-diameter roller section needs to be adjusted, making the adjustment more convenient. Attached Figure Description

[0050] Figure 1 A schematic diagram of the main structure of the bag-making equipment provided in this application;

[0051] Figure 2 A three-dimensional structural diagram of the bag-making equipment provided in this application;

[0052] Figure 3 A three-dimensional structural diagram of the bag-forming equipment provided in this application, showing the removal of the bag body forming component;

[0053] Figure 4 A three-dimensional structural diagram of the bag reversing component in the bag making equipment provided in this application;

[0054] Figure 5 This is a three-dimensional structural diagram of the reversing roller in the bag-making equipment provided in this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 10. First direction; 20. Second direction; 30. Third direction;

[0057] 100. Bag forming components;

[0058] 200. Bag folding assembly; 210. Bag folding component; 211. Pressing component; 212. Main pressing component; 213. Auxiliary pressing component; 220. Moving part; 230. Limiting component;

[0059] 300. Bag alignment part; 310. Front positioning part; 320. Side positioning part;

[0060] 400. Bag reversing assembly; 410. Arc-shaped channel; 420. Reversing roller; 421. Small diameter roller section; 422. Large diameter roller section; 430. First conveyor belt; 440. Second conveyor belt. Detailed Implementation

[0061] In the manufacturing process of packaging bags, bag-making equipment is used to process sheet materials into bags of a predetermined shape. In existing bag-making equipment, after the bag forming assembly forms the sheet material into a stand-up pouch, it usually needs to be transported to the folding station via a turning, flipping, or transfer mechanism. During the turning, flipping, or transfer process of the stand-up pouch, the spatial posture of the bag may change, resulting in differences in the initial state of each bag when entering the folding process, which in turn affects the consistency of the overall state of each bag in mass production.

[0062] Especially for easily deformable materials such as aluminum-plastic composite film bags, or thinner materials such as plastic film bags with a thickness of less than 50μm, the bags are more prone to deformation, wrinkling, or displacement during turning, flipping, or transfer, which in turn affects the folding quality and sealing performance of the bags.

[0063] To address this issue, this application provides a bag-making device that aligns the inlet end of the bag folding assembly with the outlet end of the bag forming assembly in a first direction. This allows the sheet material, after being formed into a three-dimensional bag, to directly enter the folding process along the same direction. Throughout the entire bag-making process, the bag's direction of travel remains consistent, eliminating the need for turning or flipping. This helps improve the consistency of the overall state of each bag in mass production. In use, the bag directly enters the folding assembly along the first direction after forming, avoiding abrupt changes in inertial forces on different parts of the bag during turning or flipping, thus reducing deformation or displacement of the bag due to changes in force.

[0064] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0065] like Figures 1 to 2 As shown, the bag-making equipment provided in this application includes a bag forming assembly 100 and a bag folding assembly 200; wherein the bag forming assembly 100 receives sheet material and forms the received sheet material into a three-dimensional bag; the bag folding assembly 200 is located downstream of the bag forming assembly 100, receives the three-dimensional bag from the bag forming assembly 100 and folds the bag body of the three-dimensional bag into a flat shape; and the inlet end of the bag folding assembly 200 is aligned with the outlet end of the bag forming assembly 100 in a first direction 10, and the three-dimensional bag from the bag forming assembly 100 enters the bag folding assembly 200 along the first direction 10.

[0066] Specifically, the bag forming assembly 100 is a component or assembly of components used to process sheet material into a three-dimensional bag. For example, the bag forming assembly 100 may include a forming mold, a sealing mechanism, etc., for processing sheet material into a three-dimensional bag with a predetermined shape. The bag forming assembly 100 has a bag forming path, in which the sheet material completes the forming process.

[0067] The bag folding assembly 200 is a component or assembly of components used to fold a stand-up pouch into a flat shape. The bag folding assembly 200 may include a folding mechanism, a pressing mechanism, etc., for folding the stand-up pouch into a flat shape. The bag folding assembly 200 has a bag folding path, in which the stand-up pouch completes the folding process.

[0068] More specifically, after the bag forming assembly 100 processes the sheet material into a three-dimensional bag, the three-dimensional bag exits from the outlet end of the bag forming assembly 100 along the first direction 10 and directly enters the inlet end of the bag folding assembly 200. The bag folding assembly 200 folds the three-dimensional bag into a flat bag shape along the second direction 20. Throughout the entire bag making process, the direction of travel of the bag remains consistent, eliminating the need for turning or flipping, which helps improve the consistency of the overall state of each bag in mass production. In use, the bag directly enters the folding assembly along the first direction 10 after forming, avoiding abrupt changes in the inertial forces experienced by different parts of the bag during turning or flipping, thus helping to reduce deformation or displacement of the bag due to changes in force.

[0069] In this application, the specific structures of the bag forming assembly 100 and the bag folding assembly 200 are not limited, for example:

[0070] In one embodiment, the bag forming assembly 100 can employ the forming mechanism of a vertical bag-making machine. The sheet material is fed in from above and, after processes such as die pressing, side insertion, and sealing, is formed into a three-dimensional bag. The three-dimensional bag exits from the outlet end of the bag forming assembly 100 along a first direction 10 and directly enters the inlet end of the bag folding assembly 200. The first direction 10 can be vertical or slightly inclined relative to the vertical direction, as long as it ensures that the three-dimensional bag can smoothly enter the bag folding assembly 200.

[0071] In another embodiment, the bag forming assembly 100 can also adopt the forming mechanism of a horizontal bag making equipment. The sheet material enters from the horizontal direction. The bag forming assembly 100 includes a side folding mechanism and a sealing mechanism. The side folding mechanism folds the corresponding side of the sheet material to form a three-dimensional shape, and then the sealing mechanism seals and fixes the connecting seam.

[0072] In another embodiment, the bag folding assembly 200 may employ a pair of opposing folding plates that can move relative to each other in a second direction 20 to fold the three-dimensional bag into a flat shape. The folding plates may be made of metal or rigid plastic, and their surfaces facing the bag may have a smooth coating to reduce friction on the bag during folding.

[0073] In another embodiment, a transition plate is provided between the outlet end of the bag forming assembly 100 and the inlet end of the bag folding assembly 200. The transition plate extends along the first direction 10, and its width matches the width of the outlet end of the bag forming assembly 100 and the width of the inlet end of the bag folding assembly 200, so that the three-dimensional bag can smoothly transition from the bag forming assembly 100 to the bag folding assembly 200.

[0074] Based on the bag-making equipment provided in this application, such as Figures 1 to 2 As shown, the bag forming path in the bag forming assembly 100 and the bag folding path in the bag folding assembly 200 both extend along the first direction 10, and the center of the bag forming path and the center of the bag folding path are aligned with each other in the first direction 10.

[0075] Specifically, the bag forming path is the trajectory of the sheet material moving within the bag forming assembly 100. The bag forming path extends along a first direction 10, causing the sheet material to move along the first direction 10 during the forming process. The bag folding path is the trajectory of the stand-up pouch moving within the bag folding assembly 200. The bag folding path extends along the first direction 10, causing the stand-up pouch to move along the first direction 10 during the folding process.

[0076] Furthermore, since the center of the bag forming path and the center of the bag folding path are aligned with each other in the first direction 10, the direction of the conveying force on each part of the bag remains consistent throughout the entire conveying process of the three-dimensional bag. This helps to reduce the twisting or displacement of the bag caused by the change in the direction of the force, and the conveying posture is more accurate.

[0077] In this application, both the bag forming path and the bag folding path extend along the first direction 10, so that the movement direction of the sheet remains consistent throughout the entire process from forming to folding, which helps to improve the consistency of the overall state of each bag in mass production.

[0078] In one embodiment, the bag forming path can be a straight path, along which the sheet material moves to complete the forming process. A straight path helps simplify the equipment structure and improve production efficiency.

[0079] In another embodiment, the folding path of the bag can be a straight path, along which the 3D bag moves to complete the folding process. A straight path helps ensure that the force on the 3D bag is more even during the folding process, reducing wrinkles or deformation caused by uneven force on the bag.

[0080] In another embodiment, the bag forming path and the bag folding path can both be straight paths, and they are aligned in the first direction 10, so that the movement direction of the sheet remains consistent throughout the entire process from forming to folding, which helps to improve the consistency of the overall state of each bag in mass production.

[0081] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, a bag alignment portion 300 is also provided between the inlet end of the bag folding assembly 200 and the outlet end of the bag forming assembly 100. The bag alignment portion 300 extends along the first direction 10, with its inlet end adapted and aligned with the outlet end of the bag forming assembly 100 in the first direction 10, and its outlet end adapted and aligned with the inlet end of the bag folding assembly 200 in the first direction 10. The three-dimensional bag from the bag forming assembly 100 enters the bag alignment portion 300 along the first direction 10, is aligned by the bag alignment portion 300, and then enters the bag folding assembly 200 after the center of the bottom of the three-dimensional bag is aligned with the center of the inlet end of the bag folding path.

[0082] Specifically, the bag alignment section 300 is a component or combination of components used to align and correct the stand-up pouch from the bag forming assembly 100. The bag alignment section 300 extends along the first direction 10, allowing the stand-up pouch to complete alignment during travel without stopping or slowing down. Furthermore, the inlet end of the bag alignment section 300 is adapted and aligned with the outlet end of the bag forming assembly 100, allowing the stand-up pouch to smoothly enter the bag alignment section 300 from the bag forming assembly 100. The outlet end of the bag alignment section 300 is adapted and connected with the inlet end of the bag folding assembly 200, allowing the stand-up pouch to smoothly enter the bag folding assembly 200 from the bag alignment section 300.

[0083] Furthermore, in this application, the alignment of the bag body alignment portion 300 with the three-dimensional bag includes aligning the bottom edge of the three-dimensional bag with the corresponding edge of the inlet end of the bag body folding assembly 200 at the outlet end of the bag body channel of the bag body alignment portion 300 in the second direction 20; wherein the second direction 20 is perpendicular to the first direction 10, and the bag body folding assembly 200 folds the bag body of the three-dimensional bag along the second direction 20.

[0084] Specifically, the bag alignment part 300 aligns the bottom edge of the stand-up pouch with the entrance end of the bag folding assembly 200 in the second direction 20. This allows the bag to enter the entrance end of the bag folding assembly 200 more smoothly, and production will not be interrupted due to interference between the bottom edge of the stand-up pouch and the corresponding edge of the entrance end of the bag folding assembly 200. Furthermore, the bag folding assembly 200 folds the stand-up pouch along the second direction 20, which is perpendicular to the first direction 10. This allows the stand-up pouch to be pressed and folded more accurately, resulting in a better folding effect.

[0085] The structure of the bag alignment portion 300 in this application is not limited, for example:

[0086] In one embodiment, the bag alignment section 300 takes the form of an alignment channel, with the inlet dimension of the alignment channel being larger than the outlet dimension, so that the 3D bag is gradually restricted to centering as it passes through the alignment channel. The alignment channel can be made of metal, and its inner surface can be coated with a smooth coating to reduce the friction experienced by the 3D bag during the alignment process.

[0087] In another embodiment, the bag alignment section 300 may also take the form of an alignment roller, the distance of which gradually decreases from the inlet end to the outlet end in the second direction 20, so that the 3D bag is gradually restricted to centering as it passes through the alignment roller. The alignment roller may be made of metal and its surface may be provided with an elastic layer to reduce damage to the 3D bag during the alignment process.

[0088] In another embodiment, the bag alignment portion 300 may also take the form of an alignment band, the distance of which gradually decreases from the inlet end to the outlet end in the second direction 20, so that the stand-up pouch is gradually restricted in centering as it passes through the alignment band. The alignment band may be made of an elastic material, and its surface may be provided with anti-slip texture to increase the friction between the alignment band and the stand-up pouch.

[0089] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, the alignment of the bag body channel with the 3D bag also includes aligning the bottom edge of the 3D bag with the corresponding edge of the inlet end of the bag body folding assembly 200 at the outlet end of the bag body channel and on the third direction 30; wherein the third direction 30 is perpendicular to the first direction 10 and the second direction 20.

[0090] Specifically, the third direction 30 is a direction perpendicular to the plane formed by the first direction 10 and the second direction 20. The bottom of the 3D bag is aligned with the entrance end of the bag folding assembly 200 on the third direction 30, ensuring that the bottom of the 3D bag is accurately aligned with the entrance end of the bag folding assembly 200 in the two-dimensional plane.

[0091] Furthermore, the bag alignment part 300 aligns the bottom of the three-dimensional bag in the third direction 30, so that the bottom of the three-dimensional bag is accurately aligned with the entrance end of the bag folding assembly 200 in the two-dimensional plane, which further improves the consistency of the initial state of each bag when it enters the folding process.

[0092] In one embodiment, the outlet end of the bag alignment section 300 may be provided with a third-direction 30 alignment mechanism, which may take the form of an alignment plate, an alignment roller or an alignment belt, and is capable of aligning the bottom of the three-dimensional bag on the third-direction 30.

[0093] In another embodiment, the third-direction 30 alignment mechanism may also employ a pair of opposing alignment plates that can move relative to each other on the third-direction 30 to align the bottom of the stand-up pouch to a predetermined position. The alignment plates may be made of metal, and their surfaces facing the pouch may have an elastic layer to reduce damage to the stand-up pouch during alignment.

[0094] In another embodiment, the third-direction 30 alignment mechanism can also take the form of an alignment conveyor belt, which can move relative to each other on the third-direction 30 to align the bottom of the stand-up pouch to a predetermined position. The alignment conveyor belt can be made of an elastic material, and its surface can be provided with anti-slip texture to increase the friction between the alignment conveyor belt and the stand-up pouch.

[0095] Based on the bag-making equipment provided in this application, the bag body alignment portion 300 includes a bag body alignment path extending along the first direction 10 within the bag body channel; and the dimension of the other end of the bag body alignment path near the bag body forming assembly 100 in the second direction 20 is greater than or equal to the dimension of the bottom of the three-dimensional bag in the second direction 20; and the dimension of the one end of the bag body alignment path near the bag body folding assembly 200 in the second direction 20 is less than or equal to the dimension of the bottom of the three-dimensional bag in the second direction 20, and the dimension in the third direction 30 is equal to the dimension of the bottom of the three-dimensional bag in the third direction 30.

[0096] Specifically, the bag alignment path is the trajectory of the 3D bag as it moves within the bag alignment section 300. The inlet dimension of the bag alignment path is greater than or equal to the bottom dimension of the 3D bag, allowing the 3D bag to smoothly enter the alignment path. The outlet dimension of the bag alignment path is less than or equal to the bottom dimension of the 3D bag, causing the 3D bag to gradually be restricted in its centering as it passes through the alignment path.

[0097] More specifically, in this application, the inlet dimension of the bag alignment path in the second direction 20 is greater than or equal to the bottom dimension of the 3D bag in the second direction 20, and the outlet dimension in the second direction 20 is less than or equal to the bottom dimension of the 3D bag in the second direction 20, and its dimension in the third direction 30 is equal to the bottom dimension of the 3D bag in the third direction 30. This dimensional setting allows the 3D bag to gradually be restricted to centering as it passes through the bag alignment path, enabling it to automatically adjust its position during travel and facilitating automatic alignment of the bag.

[0098] This application does not limit the specific form of the bag alignment path, for example:

[0099] In one embodiment, the bag alignment path takes the form of an alignment channel, with the inlet dimension of the alignment channel being larger than the outlet dimension, so that the 3D bag is gradually restricted to centering as it passes through the alignment channel. The alignment channel can be made of metal, and its inner surface can be coated with a smooth coating to reduce the friction experienced by the 3D bag during alignment.

[0100] In another embodiment, the bag alignment path can also take the form of an alignment roller, the distance of which gradually decreases from the inlet end to the outlet end in the second direction 20, so that the 3D bag is gradually restricted to centering as it passes through the alignment roller. The alignment roller can be made of metal, and its surface can be provided with an elastic layer to reduce damage to the 3D bag during the alignment process.

[0101] In another embodiment, the bag alignment path can also take the form of an alignment strip, the distance of which gradually decreases from the inlet to the outlet in the second direction 20, thus gradually restricting the alignment of the stand-up pouch as it passes through the alignment strip. The alignment strip can be made of an elastic material, and its surface can be provided with anti-slip textures to increase the friction between the alignment strip and the stand-up pouch.

[0102] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, the center portions of the bag forming path, the bag alignment path, and the bag folding path are aligned with each other in the first direction 10; and the cross-sectional shape of the end of the bag alignment path near the bag folding assembly 200, which is perpendicular to the first direction 10, is rectangular.

[0103] Specifically, the center of the bag forming path, the bag alignment path, and the bag folding path are aligned with each other in the first direction 10, so that the center line of the movement trajectory of the three-dimensional bag remains consistent during the process from the bag forming assembly 100 to the bag folding assembly 200, which helps to ensure that the position of each bag is more accurate when it enters the folding process.

[0104] Furthermore, the cross-section of the end of the bag alignment path near the bag folding assembly 200, perpendicular to the first direction 10, is rectangular, so that the shape of the exit end of the bag alignment path matches the shape of the inlet end of the bag folding path, which helps to ensure that the three-dimensional bag can smoothly enter the bag folding assembly 200.

[0105] In this application, the center parts of the three paths are aligned with each other, so that when the bag is transferred between the paths, the conveying force on each part of the bag is more uniform, which helps to reduce the twisting or displacement of the bag caused by uneven force.

[0106] In one embodiment, the bag forming path, the bag alignment path, and the bag folding path are all straight paths, and their centerlines are aligned with each other in the first direction 10, so that the centerline of the movement trajectory of the three-dimensional bag remains consistent during the process from the bag forming assembly 100 to the bag folding assembly 200.

[0107] In another embodiment, the exit end of the bag alignment path has a rectangular cross-section, the width of which matches the width of the inlet end of the bag folding path, allowing the 3D bag to smoothly enter the bag folding assembly 200. The height of the rectangle may be slightly greater than the thickness of the 3D bag to allow it to pass through smoothly.

[0108] In another embodiment, the center of the bag forming path, the bag alignment path, and the bag folding path are aligned by alignment marks, which can be set on the side or bottom of each path to facilitate alignment during equipment installation and commissioning.

[0109] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, the bag alignment portion 300 includes a pair of front positioning portions 310 disposed opposite each other on both sides of the bag alignment path in the second direction 20, and a pair of side positioning portions 320 disposed opposite each other on both sides of the bag alignment path in the third direction 30; wherein each front positioning portion 310 and each side positioning portion 320 extends along the first direction 10.

[0110] Specifically, the front positioning part 310 is a component or assembly of components used for positioning the stand-up pouch in the second direction 20. For example, the front positioning part 310 may be a front guide plate or belt that extends obliquely from the inlet end of the bag alignment path toward the outlet end relative to the first direction 10 and gradually approaches each other. The side positioning part 320 is a component or assembly of components used for positioning the stand-up pouch in the third direction 30. The side positioning part 320 may be a side guide plate or belt that extends obliquely from the inlet end of the bag alignment path toward the outlet end relative to the first direction 10 and gradually approaches each other.

[0111] The front positioning part 310 and the side positioning part 320 limit the stand-up pouch from two mutually perpendicular directions, so that the guiding force on the stand-up pouch is more evenly distributed during movement, which helps to reduce the torsion of the pouch caused by unilateral force.

[0112] This application does not limit the specific structure and arrangement of the front positioning part 310 and the side positioning part 320, for example:

[0113] In one embodiment, the front positioning part 310 may take the form of a front guide plate, which may be arranged opposite to each other in the second direction 20, and its tilt angle may be adjusted to adapt to the alignment requirements of stand-up pouches of different sizes.

[0114] In another embodiment, the side positioning part 320 can take the form of a side guide plate, which can be arranged opposite to each other on the third direction 30, and its tilt angle can be adjusted to adapt to the alignment requirements of three-dimensional bags of different widths.

[0115] In another embodiment, the front positioning part 310 and the side positioning part 320 may both be in the form of guide rollers. The guide rollers can be arranged opposite to each other in the corresponding directions, and their tilt angle can be adjusted to adapt to the alignment requirements of stand-up pouches of different sizes or widths.

[0116] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, a pair of front positioning portions 310 are configured as a pair of front guide members that extend obliquely from the inlet end of the bag alignment path toward the outlet end, relative to the first direction 10 and gradually approach each other; wherein the oblique angle of each front guide portion relative to the first direction 10 is in the range of 5° to 25°, and the pair of front guide members are symmetrically arranged in the second direction 20.

[0117] The front guide member is a component or combination of components used to guide the stand-up pouch in the second direction 20. The front guide members extend obliquely relative to the first direction 10 and gradually approach each other, so that the stand-up pouch is gradually restricted and centered as it passes through the front guide members.

[0118] The tilt angle of each front guide component relative to the first direction 10 is adjustable, so that the front positioning part 310 can adapt to the alignment requirements of stand-up pouches of different sizes.

[0119] A pair of front guide members extend obliquely from the inlet end of the bag alignment path towards the outlet end, relative to the first direction 10, and gradually approach each other. This causes the guiding force on the stand-up pouch to gradually increase as it passes through the front guide members, resulting in a smooth alignment process. The oblique angle of each front guide member relative to the first direction 10 is within the range of 5° to 25°, for example, it can be any angle such as 5°, 10.5°, or 25°. Furthermore, the pair of front guide members are symmetrically arranged in the second direction 20.

[0120] In one embodiment, the front guide component can be in the form of a front guide plate. One end of the front guide plate is mounted on the frame of the bag alignment part 300 via a pivot, and the other end can be freely adjusted in position. By changing the tilt angle of the front guide plate, the size of the inlet and outlet ends of the bag alignment path can be adjusted.

[0121] In another embodiment, the front guide component takes the form of a front guide roller. One end of the front guide roller is mounted on the frame of the bag alignment part 300 via a rotating shaft, and the other end can be freely adjusted in position. By changing the tilt angle of the front guide roller, the size of the inlet and outlet ends of the bag alignment path can be adjusted.

[0122] In another embodiment, the tilt angle adjustment of the front guide component is driven by a servo motor, which can automatically adjust to a predetermined angle according to the size parameters of the three-dimensional bag, with high adjustment accuracy, suitable for the needs of quick specification change.

[0123] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, a pair of side positioning portions 320 are configured as a pair of side guide members that extend obliquely from the inlet end of the bag alignment path toward the outlet end, relative to the first direction 10 and gradually approach each other; wherein the oblique angle of each side guide portion relative to the first direction 10 is in the range of 2° to 15°, and the pair of side guide members are symmetrically arranged on the third direction 30.

[0124] Specifically, in this application, the side guide members are components or combinations of components used to guide the stand-up pouch in the third direction 30. The side guide members extend obliquely relative to the first direction 10 and gradually approach each other, so that the stand-up pouch is gradually restricted to centering as it passes through the side guide members. The oblique angle of each side guide member relative to the first direction 10 is adjustable, so that the side positioning part 320 can adapt to the alignment requirements of stand-up pouches of different widths.

[0125] A pair of side guide components extend obliquely from the inlet end of the bag alignment path towards the outlet end, relative to the first direction 10, and gradually approach each other. This causes the guiding force on the three-dimensional bag to gradually increase as it passes through the side guide components, forming a smooth alignment process. The oblique angle of each side guide component relative to the first direction 10 is in the range of 2° to 15°, for example, it can be any angle such as 2°, 10.5°, or 15°. Furthermore, the pair of side guide components are symmetrically arranged in the third direction 30.

[0126] In one embodiment, the side guide component can be in the form of a side guide plate. One end of the side guide plate is mounted on the frame of the bag alignment part 300 via a pivot, and the other end can be freely adjusted in position. By changing the tilt angle of the side guide plate, the width of the inlet and outlet ends of the bag alignment path can be adjusted.

[0127] In another embodiment, the side guide component can be in the form of a side guide roller. One end of the side guide roller is mounted on the frame of the bag alignment part 300 via a rotating shaft, and the other end can be freely adjusted in position. By changing the tilt angle of the side guide roller, the width of the inlet and outlet ends of the bag alignment path can be adjusted.

[0128] In another embodiment, the tilt angle adjustment of the side guide component is driven by a servo motor, which can automatically adjust to a predetermined angle according to the width parameter of the three-dimensional bag, with high adjustment accuracy, suitable for the needs of rapid production changeover.

[0129] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, at least one of the pair of front guides has a front drag portion facing a corresponding side wall of the 3D bag and is capable of dragging the 3D bag along the bag body alignment path; and / or at least one of the pair of side guides has a side drag portion facing a corresponding side wall of the 3D bag and is capable of dragging the 3D bag along the bag body alignment path.

[0130] Specifically, the front drag unit is a component or assembly of components used to drag the 3D bag along the bag alignment path. The front drag unit can be disposed on the front guide component, facing the corresponding sidewall of the 3D bag, and can generate friction with the sidewall of the 3D bag, thereby dragging the 3D bag along the bag alignment path. The side drag unit is a component or assembly of components used to drag the 3D bag along the bag alignment path. The side drag unit can be disposed on the side guide component, facing the corresponding sidewall of the 3D bag, and can generate friction with the sidewall of the 3D bag, thereby dragging the 3D bag along the bag alignment path.

[0131] More specifically, the front drag section and / or the side drag section can drag the stand-up pouch along the alignment path of the pouch body, providing continuous conveying power to the stand-up pouch, so that the stand-up pouch can move smoothly during the alignment process, reducing the possibility of the pouch body stopping or shifting, and helping to improve the stability of the alignment process.

[0132] In this application, the specific structure of the front drag part and the side drag part is not limited, for example:

[0133] In one embodiment, both front guide sections may be provided with front drag sections, or only one of them may be provided with a front drag section. The front drag section may be in the form of a drag belt, which rotates around two pulleys spaced apart along the first direction 10, and its rotation direction is consistent with the first direction 10. The drag belt may be made of an elastic material, and its surface may be provided with anti-slip texture to increase the friction between the drag belt and the stand-up pouch.

[0134] In another embodiment, both sides of the guide section may be provided with side drag sections, or only one of them may be provided with a side drag section. The side drag section may be in the form of a drag roller, the axis of which is aligned with the first direction 10, and its rotation direction is aligned with the first direction 10. The drag roller may be made of metal, and its surface may be provided with an elastic layer to increase the friction between the drag roller and the 3D bag.

[0135] In another embodiment, both the front drag section and the side drag section can be in the form of a drag belt. They can be set simultaneously or separately, so that the bag alignment section 300 can adapt to different application scenarios.

[0136] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, the distance between one end of a pair of front positioning portions 310 near the bag body folding assembly 200 in the second direction 20 is adjustable; and the distance between one end of a pair of side positioning portions 320 near the bag body folding assembly 200 in the third direction 30 is adjustable.

[0137] Specifically, the distance between the ends of a pair of front positioning portions 310 near the bag body folding assembly 200 in the second direction 20 is adjustable, allowing the front positioning portions 310 to adapt to the alignment requirements of stand-up pouches of different sizes. The distance between the ends of a pair of side positioning portions 320 near the bag body folding assembly 200 in the third direction 30 is adjustable, allowing the side positioning portions 320 to adapt to the alignment requirements of stand-up pouches of different widths.

[0138] More specifically, by adjusting the distance between the front positioning part 310 and the side positioning part 320 near the end of the bag folding assembly 200, this application enables the positional accuracy of stand-up pouches of different sizes to be closer at the exit end, which helps to improve the consistency of the alignment state of bags of different specifications in mass production.

[0139] The front positioning part 310 and the side positioning part 320 can be configured to adjust only the distance at their ends, or they can be adjusted as a whole. Both can be manually adjusted, with the end distance of the front positioning part 310 changed by manually rotating the adjusting screw, suitable for small-batch, multi-specification production scenarios. Alternatively, a pneumatic adjustment mechanism can be used, with a pneumatic cylinder changing the end distance of the side positioning part 320, suitable for scenarios requiring rapid adjustment. They can also both be driven by servo motors, automatically adjusting to a predetermined distance based on the size parameters of the 3D bag, offering high adjustment accuracy and suitable for rapid production changeover needs.

[0140] Based on the bag-making equipment provided in this application, such as Figures 1 to 3As shown, the bag folding assembly 200 includes a pair of stacking bag components 210 disposed opposite to each other in the second direction 20. A bag folding path extending along the first direction 10 is formed between the pair of stacking bag components 210, and the three-dimensional bag is folded into a flat shape along the second direction 20. The end of the pair of stacking bag components 210 near the bag alignment portion 300 serves as the inlet end of the bag folding assembly 200 and is aligned with the outlet end of the bag alignment path in the first direction 10.

[0141] Specifically, the folding bag component 210 is a component or combination of components used to fold the stand-up pouch into a flat bag shape. A pair of folding bag components 210 are arranged opposite each other in the second direction 20, forming a bag folding path between them. The folding bag component 210 can fold the stand-up pouch into a flat shape along the second direction 20.

[0142] Furthermore, one end of the pair of folding bag components 210 near the bag body alignment portion 300 serves as the inlet end of the bag body folding assembly 200, and is aligned with the outlet end of the bag body alignment path in the first direction 10. In use, the folding bag components 210 apply a more uniform folding force to the three-dimensional bag, which helps to reduce wrinkles or deformations caused by uneven force on the bag body.

[0143] In this application, the specific structure of the stacking bag component 210 is not limited, for example:

[0144] In one embodiment, the folding bag component 210 takes the form of folding plates that can move relative to each other in a second direction 20 to fold the stand-up pouch into a flat shape. The folding plates can be made of metal or rigid plastic, and their surfaces facing the bag body can be coated with a smooth coating to reduce friction on the bag body during folding.

[0145] In another embodiment, the folding bag component 210 may take the form of folding straps that can move relative to each other in the second direction 20 to fold the stand-up pouch into a flat shape. The folding straps may be made of an elastic material, and their surface may be provided with anti-slip textures to increase the friction between the folding straps and the stand-up pouch.

[0146] In another embodiment, the folding component 210 may also take the form of folding rollers, which can move relative to each other in the second direction 20 to fold the stand-up pouch into a flat shape. The folding rollers may be made of metal and have an elastic layer on their surface to reduce damage to the stand-up pouch during the folding process.

[0147] Based on the bag-making equipment provided in this application, such as Figures 1 to 3As shown, a pair of stacking bag components 210 may include a pair of pressing components 211 disposed opposite to each other in the second direction 20 and capable of moving opposite or back to each other in the second direction 20. At least one of the pressing components 211 has a pressing drag part that faces a corresponding side wall toward the stand-up pouch and can drag the stand-up pouch along the folding path of the bag body.

[0148] A pair of stacking bag components 210 may also include a pair of extrusion components extending obliquely from the inlet end of the bag body folding path toward the outlet end, relative to the first direction 10 and gradually approaching each other, at least one of the extrusion components having a corresponding sidewall facing the stand-up pouch and an extrusion dragging part that can drag the stand-up pouch along the bag body folding path.

[0149] Specifically, the pressing component 211 is a component or combination of components used to press the stand-up pouch. A pair of pressing components 211 can move relative to or away from each other in the second direction 20, allowing the bag folding assembly 200 to adapt to the folding requirements of stand-up pouches of different thicknesses. The pressing dragging component is a component or combination of components used to drag the stand-up pouch along the bag folding path. The pressing dragging component can be disposed on the pressing component 211, facing the corresponding side wall of the stand-up pouch, and can generate friction with the side wall of the stand-up pouch, thereby dragging the stand-up pouch along the bag folding path. The squeezing component is a component or combination of components used to squeeze the stand-up pouch. A pair of squeezing components can move relative to or away from each other in the second direction 20, allowing the bag folding assembly 200 to adapt to the folding requirements of stand-up pouches of different thicknesses. The squeezing dragging component is a component or combination of components used to drag the stand-up pouch along the bag folding path. The squeezing dragging component can be disposed on the squeezing component, facing the corresponding side wall of the stand-up pouch, and can generate friction with the side wall of the stand-up pouch, thereby dragging the stand-up pouch along the bag folding path.

[0150] More specifically, when a pair of folding bag components 210 includes a pair of pressing components 211, the pressing components 211 can move relative to or away from each other in the second direction 20, and the pressing drag part can drag the three-dimensional bag along the folding path of the bag body.

[0151] When a pair of folding bag components 210 includes a pair of squeezing components, the squeezing components extend obliquely from the inlet end of the bag folding path toward the outlet end, relative to the first direction 10, and gradually approach each other. The squeezing dragging part can drag the stand-up pouch along the bag folding path. In use, the pressing component 211 and the squeezing component apply a relatively uniform force to the stand-up pouch, so that the force distribution on the stand-up pouch during the folding process is relatively consistent.

[0152] This application does not limit the structure of the extrusion component and the pressing component 211, for example:

[0153] In one embodiment, the squeezing or pressing component 211 may be a conveyor belt, which can move relative to each other in the second direction 20 to press the stand-up pouch. The pressing or squeezing drag part is the surface of the conveyor belt, which rotates around two pulleys spaced apart along the first direction 10, and its rotation direction is consistent with the first direction 10.

[0154] In another embodiment, the squeezing or pressing component 211 may be in the form of a roller, and a pair of rollers may move relative to each other in the second direction 20 to squeeze the three-dimensional bag. The pressing or squeezing drag part is the roller surface of the roller, and the axial direction of the roller is consistent with the first direction 10, and its rotation direction is consistent with the first direction 10.

[0155] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, each of the pair of pressing components 211 includes a main pressing component 212 and at least one pair of auxiliary pressing components 213 adjustablely disposed on both sides of the main pressing component 212 along a third direction 30.

[0156] The main pressing component 212 is the primary pressing part of the pressing component 211. It can be fixed in position in the second direction 20, ensuring a relatively stable basic pressing force on the folding bag during folding. The auxiliary pressing component 213 is the auxiliary pressing part of the pressing component 211. Its position in the second direction 20 is adjustable, and its position can be adjusted according to the width of the folding bag, helping to ensure that the pressing force on folding bags of different widths is appropriate. Through the cooperation of the main pressing component 212 and the auxiliary pressing component 213, the pressing force distribution on the folding bag during folding is relatively uniform.

[0157] In one embodiment, the main pressing member 212 is in the form of a fixed pressing plate, the position of which is fixed in the second direction 20. The auxiliary pressing member 213 is in the form of an adjustable pressing plate, the position of which can be adjusted by adjusting screws or a pneumatic cylinder in the second direction 20.

[0158] In another embodiment, the main pressing member 212 is in the form of a separate conveyor belt. The auxiliary pressing member 213 is in the form of an adjustable pressing roller, and the auxiliary pressing member 213 can be configured as a separate conveyor belt, the position of which in the second direction 20 can be adjusted by adjusting screws or pneumatic cylinders.

[0159] In another embodiment, the position adjustment of the auxiliary pressing component 213 is achieved by a servo motor-driven screw mechanism, which can automatically adjust to a predetermined position according to the width parameter of the three-dimensional bag, with high adjustment accuracy, suitable for the needs of rapid production changeover.

[0160] It should be understood that this application does not limit the number of auxiliary pressing components 213, for example, it can be any number such as 2 or 4.

[0161] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, the distance between a pair of folding bag components 210 in the second direction 20 is adjustable; and a folding bag component 210 located on the same side in the second direction 20 and the corresponding end of a corresponding front positioning part 310 are synchronously and adjustablely disposed on the same moving part 220 that can move along the second direction 20.

[0162] Specifically, the distance between a pair of folding bag components 210 in the second direction 20 is adjustable, allowing the bag folding assembly 200 to adapt to the folding requirements of three-dimensional bags of different thicknesses. A folding bag component 210 located on the same side of the second direction 20 and the corresponding end of a front positioning part 310 are synchronously adjustable and mounted on the same movable part 220 that can move along the second direction 20, allowing the folding bag component 210 and the front positioning part 310 to be adjusted synchronously.

[0163] More specifically, by synchronously adjusting the folding bag component 210 and the front positioning part 310 onto the same moving part 220, the folding bag component 210 and the front positioning part 310 can be adjusted synchronously, which helps to ensure that the positional accuracy of three-dimensional bags of different sizes is relatively consistent during the folding and alignment process, and helps to improve the consistency of the folding quality of bags of different specifications in mass production.

[0164] In this application, the specific structure of the mobile unit 220 is not limited, for example:

[0165] In one embodiment, the moving part 220 adopts a slider mechanism, which can move along the guide rail in the second direction 20. The position of the slider can be changed by manually rotating the adjusting screw, thereby synchronously adjusting the distance between the stacking bag part 210 and the front positioning part 310.

[0166] In another embodiment, the moving part 220 is driven by a pneumatic cylinder, which can drive the slider to move in the second direction 20, thereby synchronously adjusting the distance between the stacking bag part 210 and the front positioning part 310, which is suitable for scenarios that require rapid adjustment.

[0167] In another embodiment, the moving part 220 can also be driven by a servo motor. The servo motor drives the slider to move in the second direction 20 through a lead screw mechanism. It can automatically adjust to a predetermined distance according to the size parameters of the three-dimensional bag, with high adjustment accuracy, which is suitable for the needs of rapid production changeover.

[0168] Based on the bag-making equipment provided in this application, such as Figures 1 to 3As shown, the bag folding assembly 200 also includes a pair of limiting members 230 disposed opposite each other in the third direction 30; wherein the distance between the pair of limiting members 230 in the third direction 30 is adjustable, and one limiting member 230 located on the same side in the third direction 30 and the corresponding end of a corresponding side positioning part 320 are synchronously and adjustablely disposed on the same auxiliary moving part (not shown) that can move along the third direction 30.

[0169] Specifically, the limiting component 230 is a component or combination of components used to limit the 3D bag in the third direction 30. A pair of limiting components 230 can move relative to or away from each other in the third direction 30, so that the bag folding assembly 200 can limit the 3D bag in the third direction 30. The distance between the opposing surfaces of the pair of limiting components 230 is adjustable, so that the bag folding assembly 200 can adapt to the limiting requirements of 3D bags of different widths.

[0170] More specifically, the bag folding assembly 200 also includes a pair of limiting members 230 disposed opposite each other in the third direction 30. The distance between the pair of limiting members 230 in the third direction 30 is adjustable, and one limiting member 230 located on the same side in the third direction 30 and the corresponding end of a corresponding side positioning part 320 are synchronously and adjustablely disposed on the same auxiliary moving part that can move along the third direction 30. In use, the limiting force applied to the stand-up pouch by the limiting members 230 is relatively uniform, so that the lateral force distribution on the stand-up pouch during folding is relatively consistent.

[0171] In this application, the specific structure and arrangement of the limiting component 230 are not limited, for example:

[0172] In one embodiment, the limiting member 230 takes the form of a limiting plate, which can move relative to each other in a third direction 30 to limit the three-dimensional bag. The limiting plate can be made of metal or rigid plastic, and its surface facing the bag can be provided with a smooth coating to reduce the friction experienced by the bag during the limiting process.

[0173] In another embodiment, the limiting component 230 takes the form of a limiting conveyor belt, which rotates around two pulleys spaced apart along the first direction 10, with its rotation direction consistent with the first direction 10. The limiting conveyor belt can provide limiting for the 3D bag while simultaneously providing conveying power to the 3D bag through the rotating conveyor belt.

[0174] In another embodiment, the position adjustment of the limiting component 230 can be achieved by a servo motor-driven lead screw mechanism, which can automatically adjust to a predetermined position according to the width parameter of the three-dimensional bag, with high adjustment accuracy, suitable for the needs of rapid production changeover.

[0175] Based on the bag-making equipment provided in this application, such as Figures 1 to 3 As shown, it also includes a bag reversing assembly 400 disposed at the outlet end of the bag folding assembly 200; wherein, the bag reversing assembly 400 receives a flat bag extending along a first direction 10 from the outlet end of the bag folding assembly 200, reverses the orientation of the bag to extend along a second direction 20 and outputs it.

[0176] Specifically, the bag reversing assembly 400 is a component or combination of components used to reverse the extension direction of a flat bag from a first direction 10 to a second direction 20. The bag reversing assembly 400 is disposed at the outlet end of the bag folding assembly 200, receives the flat bag extending along the first direction 10 from the bag folding assembly 200, and reverses the bag to extend along the second direction 20 before outputting it.

[0177] In this application, the bag reversing assembly 400 receives a flat bag extending along a first direction 10 from the outlet end of the bag folding assembly 200, and reverses the orientation of the bag to extend along a second direction 20 before outputting it. In use, the reversing force applied to the flat bag by the bag reversing assembly 400 during the reversing process is relatively stable, making it less likely for the bag to be damaged or shifted during the reversing process.

[0178] This application does not limit the structure of the bag reversing assembly 400, for example:

[0179] In one embodiment, the bag reversing assembly 400 takes the form of a reversing channel, with the inlet end aligned with the first direction 10 and the outlet end open along the second direction 20. The flat bag enters from the inlet end of the reversing channel, moves along the reversing channel, and exits from the outlet end along the second direction 20.

[0180] In another embodiment, the bag reversing assembly 400 may also take the form of a reversing roller 420, the axis of which is arranged at a predetermined angle to the first direction 10. When the flat bag passes the reversing roller 420, it changes its direction of travel under the guidance of the reversing roller 420, from extending along the first direction 10 to extending along the second direction 20.

[0181] In another embodiment, the bag reversing assembly 400 employs airflow reversing. By placing airflow nozzles on both sides of the bag, the force of the airflow is used to change the direction of travel of the bag. Airflow reversing is a non-contact reversing method, which can avoid damage to the bag during the reversing process.

[0182] Based on the bag-making equipment provided in this application, such as Figure 1 , Figure 2 , Figure 4As shown, the bag reversing assembly 400 includes an arc-shaped channel 410, the inlet end of which is aligned with the outlet end of the bag folding assembly 200 in a first direction 10, and the outlet end of the arc-shaped channel 410 is open along a second direction 20.

[0183] Specifically, the arc-shaped channel 410 refers to a channel curved into an arc shape for the bag body to pass through. The entrance end of the arc-shaped channel 410 is aligned with the first direction 10, allowing the flat bag body extending along the first direction 10 from the bag body folding assembly 200 to smoothly enter the arc-shaped channel 410. The exit end of the arc-shaped channel 410 is open along the second direction 20, allowing the bag body to exit along the second direction 20 after exiting the arc-shaped channel 410.

[0184] In this application, the bag reversing assembly 400 includes an arc-shaped channel 410, the inlet end of which is aligned with the outlet end of the bag folding assembly 200 in the first direction 10, and the outlet end of the arc-shaped channel 410 is open along the second direction 20. In use, the guiding force applied to the bag by the arc-shaped channel 410 changes continuously along the arc direction, making the guiding force on the bag more stable during the reversing process, which helps reduce damage or displacement of the bag caused by sudden lateral forces.

[0185] This application does not limit the specific configuration of the arc-shaped channel 410, for example:

[0186] In one embodiment, the arcuate channel 410 may be formed by a curved guide plate, the curvature of which matches the desired reversing curvature. The guide plate may be made of metal, and its surface facing the bag may have a smooth coating or be fitted with ball bearings to reduce friction on the bag during reversing.

[0187] In another embodiment, the inner and outer walls of the arc-shaped channel 410 adopt different radii of curvature, so that the width of the arc-shaped channel 410 (i.e., the distance between the inner and outer walls) remains basically constant, thereby adapting to the thickness of the flat bag and preventing the bag from being damaged during the reversal process.

[0188] In another embodiment, auxiliary conveying mechanisms, such as auxiliary conveyor belts or auxiliary conveyor rollers, can be provided on both sides of the arc-shaped channel 410 to provide conveying power to the bag, ensuring that the bag moves smoothly in the arc-shaped channel 410 and reducing the possibility of the bag stopping or deviating during the reversal process.

[0189] More specifically, the bag-making equipment provided in this application, such as Figure 4 and Figure 5As shown, the arc-shaped channel 410 can be composed of a reversing roller 420, and a first conveyor belt 430 and a second conveyor belt 440 wound around the outer periphery of the reversing roller 420; wherein the reversing roller 420 has a small-diameter roller portion 421 located in the middle region and a pair of large-diameter roller portions 422 located at both ends along its axial direction; one side of the first conveyor belt 430 is adapted to engage with one side of the small-diameter roller portion 421, and the other side extends from the exit end of the arc-shaped channel 410 along the second direction 20; one side of the second conveyor belt 440 is adapted to engage with one side of the large-diameter roller portion 422, and the other side extends from the exit end of the arc-shaped channel 410 along the second direction 20, parallel to and spaced apart from the first conveyor belt 430; the arc-shaped channel 410 is formed by the stepped space between the small-diameter roller portion 421 and the large-diameter roller portion 422, and is jointly surrounded by the first conveyor belt 430 and the second conveyor belt 440; and the first conveyor belt 430 and the second conveyor belt 440 rotate at the same speed relative to the center of the arc-shaped channel 410.

[0190] More specifically, the reversing roller 420 is the core component of the bag reversing assembly 400. It has a small-diameter roller section 421 located in the middle region and large-diameter roller sections 422 located at both ends, making the outer circumferential surface of the reversing roller 420 stepped. A first conveyor belt 430 is wound around the outer circumference of the reversing roller 420, with one end adapted to the outer circumference of the small-diameter roller section 421 and the other end adapted to the outer circumference of the large-diameter roller section 422. This allows the first conveyor belt 430 to form an arc-shaped surface matching the shape of the arc-shaped channel 410 when wound around the outer circumference of the reversing roller 420. A second conveyor belt 440 is wound around the outer circumference of the reversing roller 420, with one end adapted to the outer circumference of the small-diameter roller section 421 and the other end adapted to the outer circumference of the large-diameter roller section 422. This also allows the second conveyor belt 440 to form an arc-shaped surface matching the shape of the arc-shaped channel 410 when wound around the outer circumference of the reversing roller 420.

[0191] Furthermore, the equal rotational speeds of the first conveyor belt 430 and the second conveyor belt 440 relative to the center of the arc-shaped channel 410 mean that the linear velocities of the first conveyor belt 430 and the second conveyor belt 440 at the center of the arc-shaped channel 410 are equal. This not only allows the bags to be continuously dragged when changing direction, but also helps to reduce the twisting or breakage of the bags caused by the speed difference between the inner and outer sides when the bags move in the arc-shaped channel 410.

[0192] In one embodiment, the small-diameter roller portion 421 and the large-diameter roller portion 422 of the reversing roller 420 can be integrally formed, and the transition between them can be rounded to reduce wear on the first conveyor belt 430 or the second conveyor belt 440 at the transition point. The reversing roller 420 can be made of metal, and its surface can be heat-treated or coated to improve wear resistance.

[0193] In another embodiment, the first conveyor belt 430 and the second conveyor belt 440 can be synchronous belts or conveyor belts with anti-slip surfaces, which can reliably drive the bag body to move and reduce the possibility of the bag body slipping on the conveyor belt. The surfaces of the first conveyor belt 430 and the second conveyor belt 440 can be textured or raised to increase the friction between them and the bag body.

[0194] In another embodiment, the first conveyor belt 430 and the second conveyor belt 440 can be driven by the same drive source, such as the same motor driving the first conveyor belt 430 and the second conveyor belt 440 simultaneously through a transmission mechanism, so that the rotation speeds of the two can be kept synchronized, reducing the speed difference caused by asynchronous driving.

[0195] In other embodiments, the small diameter roller portion 421 and the large diameter roller portion 422 of the reversing roller 420 can be configured as separate structures, that is, the large diameter roller portion 422 can be flanges installed at both ends of the reversing roller 420. In this way, when dealing with bag types of different sizes, the space of the reversing channel can be changed directly by replacing the flanges to adapt to the bag type of the corresponding size.

[0196] The bag-making equipment provided in this application aligns the inlet end of the bag folding assembly 200 with the outlet end of the bag forming assembly 100 in the first direction 10. This allows the sheet material, after being formed into a three-dimensional bag, to directly enter the folding process in the same direction. Throughout the entire bag-making process, the bag's direction of travel remains consistent, eliminating the need for turning or flipping. In use, the bag directly enters the folding assembly in the first direction 10 after forming, avoiding abrupt changes in inertial forces on different parts of the bag during turning or flipping. This helps reduce deformation or displacement of the bag due to changes in stress state. For easily deformable materials such as aluminum-plastic composite film bags, or thin materials such as plastic film bags with a thickness of less than 50 μm, maintaining the continuity of the stress state is crucial to preventing bag damage.

[0197] Furthermore, the bag alignment part 300 further improves the consistency of the initial state of each bag when it enters the folding process. The bag alignment part 300, through the front positioning part 310 and the side positioning part 320, limits and guides the stand-up pouch from two mutually perpendicular directions, ensuring that the bottom of the stand-up pouch is accurately aligned with the entrance end of the bag folding assembly 200 in a two-dimensional plane. In use, the front positioning part 310 and the side positioning part 320 limit the stand-up pouch from two mutually perpendicular directions, resulting in a more even distribution of guiding force on the stand-up pouch during movement, which helps reduce torsion caused by unilateral force on the bag.

[0198] Furthermore, the bag folding assembly 200 folds the stand-up pouch into a flat shape along the second direction 20 using a pair of folding components 210. The folding components 210 can be in the form of pressing components 211 or squeezing components, which can adapt to the folding requirements of stand-up pouches of different thicknesses. In use, the folding force applied to the stand-up pouch by the folding components 210 is relatively uniform, resulting in a more consistent force distribution on the stand-up pouch during the folding process, which helps to reduce wrinkles or deformation of the bag body caused by uneven force.

[0199] Furthermore, the bag reversing assembly 400 allows the folded, flat bag to be output in a posture suitable for subsequent processes. The bag reversing assembly 400 employs an arc-shaped channel 410 structure, ensuring a smooth and continuous reversing process, minimizing the risk of damage or displacement of the bag during reversal. In use, the guiding force applied to the bag by the arc-shaped channel 410 varies continuously along the arc direction, resulting in a relatively stable guiding force on the bag during reversal, which helps reduce damage or displacement of the bag caused by sudden lateral forces.

[0200] In summary, the bag-making equipment provided in this application allows for continuous and stable bag-making processes. The stress state and movement trajectory of each bag during forming and folding are relatively consistent, which helps improve the overall consistency of the bags in mass production. Even for easily deformable or thin materials such as aluminum-plastic composite film bags and plastic film bags with a thickness of less than 50μm, the bag-making equipment provided in this application can effectively prevent bag deformation, wrinkles, or displacement, thus improving the quality of bag production.

[0201] The specific embodiments described above illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the present invention, many specific details are included in the above description. The present invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0202] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0203] In the description of this embodiment, it should be noted that the terms "upper," "lower," "inner," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present 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 limiting the present invention.

[0204] The terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0205] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "setup," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

Claims

1. A bag-making device, characterized in that, The bag-making equipment includes a bag forming assembly and a bag folding assembly; in The bag forming assembly receives sheet material and forms the received sheet material into a three-dimensional bag; The bag folding assembly is located downstream of the bag forming assembly, receives the three-dimensional bag from the bag forming assembly, and folds the bag body of the three-dimensional bag into a flat shape; and, The inlet end of the bag folding assembly is aligned with the outlet end of the bag forming assembly in a first direction, and the three-dimensional bag from the bag forming assembly enters the bag folding assembly along the first direction. in The bag forming path in the bag forming assembly and the bag folding path in the bag folding assembly both extend along the first direction, and the center portions of the bag forming path and the bag folding path are aligned with each other in the first direction.

2. The bag-making equipment as described in claim 1, characterized in that, A bag alignment portion is also provided between the inlet end of the bag folding assembly and the outlet end of the bag forming assembly. The bag alignment portion extends along the first direction, the inlet end is adapted and aligned with the outlet end of the bag forming assembly in the first direction, and the outlet end is adapted and aligned with the inlet end of the bag folding assembly in the first direction. and The three-dimensional bag from the bag forming assembly enters the bag alignment part along the first direction, is aligned by the bag alignment part, and then enters the bag folding assembly so that the center of the bottom of the three-dimensional bag is aligned with the center of the entrance end of the bag folding path.

3. The bag-making equipment as described in claim 2, characterized in that, The alignment of the bag body alignment portion with the three-dimensional bag includes: aligning the bottom edge of the three-dimensional bag with the corresponding edge of the inlet end of the bag body folding assembly in a second direction at the outlet end of the bag body channel of the bag body alignment portion; wherein The second direction is perpendicular to the first direction, and the bag folding assembly folds the bag body of the three-dimensional bag along the second direction.

4. The bag-making equipment as described in claim 3, characterized in that, The alignment of the bag body channel with the three-dimensional bag also includes aligning the bottom edge of the three-dimensional bag with the corresponding edge of the inlet end of the bag body folding assembly at the outlet end of the bag body channel in a third direction. in The third direction is perpendicular to the first direction and the second direction.

5. The bag-making equipment as described in claim 4, characterized in that, The bag alignment portion includes a bag alignment path extending along the first direction within the bag channel; and The dimension of the bag body alignment path near the other end of the bag body forming assembly in the second direction is greater than or equal to the dimension of the bottom of the three-dimensional bag in the second direction; and The dimension of the end of the bag alignment path closest to the bag folding assembly in the second direction is less than or equal to the dimension of the bottom of the three-dimensional bag in the second direction, and the dimension in the third direction is equal to the dimension of the bottom of the three-dimensional bag in the third direction.

6. The bag-making equipment as described in claim 5, characterized in that, The center portions of the bag forming path, the bag alignment path, and the bag folding path are aligned with each other in the first direction. and, The cross-sectional shape of the bag alignment path, taken perpendicular to the first direction at one end near the bag folding assembly, is rectangular.

7. The bag-making equipment as described in claim 6, characterized in that, The bag alignment portion includes a pair of front positioning portions disposed opposite each other on both sides of the bag alignment path in the second direction, and a pair of side positioning portions disposed opposite each other on both sides of the bag alignment path in the third direction; wherein, Each of the front positioning portions and each of the side positioning portions extends along the first direction.

8. The bag-making equipment as described in claim 7, characterized in that, The pair of front positioning portions are configured as a pair of front guiding components that extend obliquely from the inlet end of the bag alignment path toward the outlet end, relative to the first direction, and gradually approach each other. in The tilt angle of each of the front guide portions relative to the first direction is in the range of 5° to 25°, and the pair of front guide components are symmetrically arranged in the second direction.

9. The bag-making equipment as described in claim 8, characterized in that, The pair of side positioning portions are configured as a pair of side guide components that extend obliquely from the inlet end of the bag alignment path toward the outlet end, relative to the first direction, and gradually approach each other. in The inclination angle of each of the side guide portions relative to the first direction is in the range of 2° to 15°, and the pair of side guide components are symmetrically arranged in the third direction.

10. The bag-making equipment as described in claim 9, characterized in that, At least one of the pair of front guides has a corresponding sidewall facing the 3D bag and a front drag section that can drag the 3D bag along the alignment path of the bag body; and / or At least one of the pair of side guides has a side wall facing the 3D bag, and a side draggable part that can drag the 3D bag along the alignment path of the bag body.

11. The bag-making equipment as described in claim 9, characterized in that, The distance between the pair of front positioning portions near one end of the bag folding assembly in the second direction is adjustable; and The distance between the end of the pair of side positioning portions near the end of the bag folding assembly in the third direction is adjustable.

12. The bag-making equipment as described in claim 11, characterized in that, The bag folding assembly includes a pair of folding bag components disposed opposite to each other in the second direction, the pair of folding bag components forming a bag folding path extending in the first direction and folding the three-dimensional bag into a flat shape in the second direction; and The end of the pair of stacked bag components near the bag body alignment portion serves as the inlet end of the bag body folding assembly and is aligned with the outlet end of the bag body alignment path in the first direction.

13. The bag-making equipment as described in claim 12, characterized in that, The pair of stacking bag components includes a pair of pressing components that are arranged opposite to each other in the second direction and can move opposite to each other or away from each other in the second direction. At least one of the pair of pressing components has a pressing drag part that faces a corresponding side wall of the three-dimensional bag and can drag the three-dimensional bag along the folding path of the bag body. or The pair of stacked bag components includes a pair of squeezing components that extend obliquely from the inlet end of the bag body folding path toward the outlet end and gradually approach each other relative to the first direction. At least one of the pair of squeezing components has a squeezing drag portion that faces a corresponding sidewall toward the three-dimensional bag and can drag the three-dimensional bag along the bag body folding path.

14. The bag-making equipment as described in claim 13, characterized in that, Each of the pair of pressing components includes a main pressing component and at least one pair of auxiliary pressing components adjustablely disposed on both sides of the main pressing component along a third direction.

15. The bag-making equipment as described in claim 13, characterized in that, The distance between the pair of stacked bag components in the second direction is adjustable; and In the second direction, one of the stacked bag components located on the same side and the corresponding end of the corresponding front positioning part are synchronously adjustable and disposed on the same movable part that can move along the second direction.

16. The bag-making equipment as described in claim 15, characterized in that, The bag folding assembly further includes a pair of limiting members disposed opposite each other on the third side; wherein The distance between the pair of limiting members in the third direction is adjustable, and the corresponding ends of one of the limiting members located on the same side in the third direction and the corresponding side positioning part are synchronously adjustable and disposed on the same auxiliary moving part that can move along the third direction.

17. The bag-making equipment according to any one of claims 3 to 16, characterized in that, It also includes a bag reversing assembly disposed at the outlet end of the bag folding assembly; wherein, The bag reversing assembly receives a flat bag extending along the first direction from the outlet end of the bag folding assembly, reverses the orientation of the bag to extend along the second direction, and outputs it.

18. The bag-making equipment as described in claim 17, characterized in that, The bag reversing assembly includes an arc-shaped channel, the entrance end of which is aligned with the exit end of the bag folding assembly in the first direction, and the exit end of which is open in the second direction.

19. The bag-making equipment as described in claim 18, characterized in that, The arc-shaped channel consists of a reversing roller, and a first conveyor belt and a second conveyor belt wrapped around the outer circumference of the reversing roller; in The reversing roller has a small-diameter roller section located in the middle region and a pair of large-diameter roller sections located at both ends along its axial direction. One side of the first conveyor belt is adapted to engage with one side of the small-diameter roller section, and the other side extends from the outlet end of the arc-shaped channel along the second direction; One side of the second conveyor belt is adapted to engage with one side of the large-diameter roller section, and the other side extends from the outlet end of the arc-shaped channel along the second direction, parallel to and spaced from the first conveyor belt; The arc-shaped channel is formed by the stepped space between the small-diameter roller section and the large-diameter roller section, and by the first conveyor belt and the second conveyor belt; and The first conveyor belt and the second conveyor belt rotate at the same speed relative to the center of the arc-shaped channel.

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