Packaging bag edge sealing device and packaging bag making equipment

Abstract

The present application discloses a packaging bag edge sealing device and packaging bag making equipment, the edge sealing device includes a supporting assembly and an edge sealing assembly, the supporting assembly is arranged on a frame, the supporting assembly includes a supporting part, and a side guide part arranged on one side of the supporting part in the width direction of the frame, the supporting part supports the folded base material from the upstream into a three-dimensional layered structure, the two side edges of the base material are guided by the side guide parts and the edges are connected to each other; the edge sealing assembly is arranged on the frame, on the side of the side guide part away from the supporting part; the edge sealing assembly includes a sealing head that can be rotated around the width direction; this edge sealing device can not only use the side guide parts to guide the side edges to be sealed to the sealing area, but also use the sealing head that can be rotated around the width direction to dynamically adjust the two side edges to be sealed, which is not only conducive to improving the aesthetics of the packaging bag, but also can improve the yield rate of packaging bags during batch production.

Description

Technical Field

[0001] The present application relates to the technical field of packaging bag production, and in particular to an edge sealing device for packaging bags and packaging bag production equipment. Background Art

[0002] Packaging bags are used to package items and are widely used in daily life and industrial production. Common packaging bags are made from a variety of materials, including polyethylene, polypropylene, polyvinyl chloride, and paper. Bag shapes also vary depending on the specific needs. For example, in the production process, a single sheet of base material is folded in half, and the double-layered base material is sealed to form a cylindrical base material. Subsequently, the bottom is sealed and cut to form a single vest bag.

[0003] During the edge sealing process, the double-layer base material may stick together, making it impossible to directly perform the edge sealing process. A support structure is usually required to hold the double-layer base material apart and align the sides to be sealed before sealing. However, during the sealing process, uneven base material traction or machine stalls often cause the two sides to be sealed to be misaligned or unable to be guided to the intended sealing position. This can lead to wrinkles in the sealed area of ​​the bag or sealing failure. This not only affects the aesthetics of the packaging bag, but also reduces the yield rate during batch production of packaging bags. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art of wrinkles or sealing failure at the sealing portion of the bag body during the production process of the packaging bag.

[0005] The present application provides an edge sealing device for a packaging bag, comprising a supporting assembly and an edge sealing assembly, wherein the supporting assembly is arranged on a frame, the supporting assembly comprises a supporting component, and a side guiding component arranged on one side of the supporting component in the width direction of the frame, the supporting component supports the folded base material from the upstream into a three-dimensional layered structure, and the two side edges of the base material are guided by the side guiding components and are in contact with each other's edges; the edge sealing assembly is arranged on the frame, on a side of the side guiding component away from the supporting component; the edge sealing assembly comprises a sealing head that can rotate around the width direction; and, viewed along the width direction, the two side edges of the base material whose edges are in contact with each other pass through the sealing area of ​​the sealing head and are sealed together by the sealing head.

[0006] Using the above-mentioned technical solution, the edge-sealing device for packaging bags provided in this application includes a support assembly and an edge-sealing assembly. During the packaging bag production process, the base material from the upstream process is folded in half and then enters the edge-sealing device. Furthermore, the base material entering the edge-sealing device is first supported by the support components of the support assembly to form a layered structure. Side guide components are then used to guide the two side edges of the base material to be sealed together, so that the sides to be sealed gradually approach and enter the edge-sealing assembly.

[0007] Furthermore, the two sides entering the edge sealing assembly are edge-jointed with each other in the edge sealing assembly and sealed by the edge sealing assembly so that the base material has a cylindrical structure. Since the edge sealing assembly in the present application includes a sealing head that can rotate around the width direction, even if the two sides that need to be sealed together are misaligned in the transmission direction due to uneven tension or machine setbacks during transmission, the sealing head that can rotate around the width direction provided by the present application can be dynamically adjusted according to the relative positions of the two sides entering the edge sealing assembly, ensuring that the two sides in the edge sealing assembly are edge-jointed with each other and the parts where the two sides are joined correspond to each other in the transmission direction, thereby avoiding defects such as leaks in the cylindrical structure due to the non-joint side edges, or wrinkles on the cylindrical structure due to the non-corresponding parts where the sides are joined. For example, if the edges of the two sides of the base material entering the edge sealing assembly are not aligned or the aligned position does not pass through the geometric center of the sealing head, the contact areas between the two sides and the sealing head are not the same. At this time, the friction between the side with the larger contact area and the sealing head of the two sides will be greater than the friction between the other side and the sealing head. As the base material gradually moves, due to the different friction forces on both sides of the sealing head, the sealing head will be dragged and rotated by the side with the larger friction. And as the sealing head rotates, the side with the larger contact area will be dragged by the rotation of the sealing head, and its edge will move toward the geometric center of the sealing head. Similarly, the edge of the side with the smaller contact area will also be dragged by the rotation of the sealing head and move toward the geometric center of the sealing head, until the aligned position of the edges of the two sides passes through the geometric center of the sealing head. With such a simple structure, the position adjustment of the two sides when they are misaligned can be achieved.

[0008] Therefore, the edge sealing device provided by the present application can not only use the side guiding components to guide the sides to be sealed to the sealing area, but also, even when the two sides may be misaligned after entering the edge sealing assembly due to factors such as the guiding error of the side guiding components, the two sides to be sealed can be dynamically adjusted by using a sealing head that can rotate around the width direction, so that the two sides to be sealed can always be sealed in a more accurate joining manner, avoiding wrinkles or sealing failures in the sealing part of the bag body during the packaging bag production process, which is not only beneficial to improving the aesthetics of the packaging bag, but also can improve the yield rate of packaging bags during batch production.

[0009] According to the edge sealing device for packaging bags provided in the present application, the two side edges of the base material are guided by side guide components and the edges overlap; viewed along the width direction, in the sealing area of ​​the sealing head, the movement direction of a side edge of the base material closer to the sealing head is consistent with the direction of the rotational linear speed of the side of the sealing head corresponding to one side edge.

[0010] By adopting the above technical solution, the sealing head of the present application is set as a rotatable structure, and since the moving direction of a side edge of the base material closer to the sealing head is consistent with the direction of the rotational linear speed of the side of the sealing head corresponding to one side edge, during the rotation of the sealing head, not only can the sealing head be used to adjust the relative position of the two side edges of the base material, but also when the edges of the two sides are overlapped, the consistency of the moving direction of the sealing head and the side edge of the base material closer to the sealing head is utilized, thereby further avoiding the possible obstruction of the base material movement caused by the friction resistance between the sealing head and the base material, and further improving the synchronization of the two side edges of the base material in the transmission direction, so that the edges of the two sides are sealed as close to the expected sealing position as possible, which can improve the aesthetics of the side sealing of the packaging bag and the yield rate of batch production of packaging bags.

[0011] According to the edge sealing device of the packaging bag provided in the present application, the edge sealing assembly also includes a movable frame movably arranged on the frame along the width direction, and a pressure adjusting component arranged between the movable frame and the sealing head; the sealing head is movably arranged on the movable frame along the width direction through an auxiliary bracket, and the pressure adjusting component can adjustably apply an extrusion force toward the base material along the width direction to the auxiliary bracket.

[0012] By adopting the above technical solution, the sealing head is movably set on the mobile frame along the width direction through the auxiliary bracket, and the mobile frame is movably set on the frame along the width direction; when in use, the position of the sealing head can be adjusted by adjusting the position of the mobile frame in the width direction as a whole to adapt to the side sealing process of bags of different widths.

[0013] In addition, the pressure regulating component can be adjusted to apply an extrusion force toward the base material in the width direction to the auxiliary bracket, so that the ironing head always applies a uniform pressure to the base material. For example, when the thickness of the base material changes, or there is a small deviation in the position, the pressure between the sealing head and the base material may not be sufficient to achieve sealing on both sides, or the extrusion force is too large to block the base material and cause stacking. The edge sealing device in this application uses the pressure regulating component to adjust the extrusion force applied to the auxiliary bracket, so that the sealing head and the base material always maintain a uniform force between each other, and on the basis of ensuring stable extrusion and sealing of both sides of the base material, it will not affect the normal transportation of the base material.

[0014] According to the edge sealing device for packaging bags provided in the present application, one end of the movable frame can be movably connected to the frame along the width direction, one end of the auxiliary bracket is connected to the other end of the movable frame through a pressure adjusting component, and the sealing head can be rotatably arranged at the other end of the auxiliary bracket around the width direction; the pressure adjusting component includes a guide member and an elastic member, wherein the guide member is extended along the width direction and is arranged between the other end of the movable frame and the corresponding end of the auxiliary bracket, and the other end of the movable frame and / or the corresponding end of the auxiliary bracket can move along the guide member; the elastic member is extended along the width direction and is sleeved on the guide member, and its two ends are respectively transmission-connected to the other end of the movable frame and the corresponding end of the auxiliary bracket.

[0015] By adopting the above-mentioned technical solution, the present application configures the pressure regulating component to include a guide member and an elastic member. The elastic member can not only absorb the impact force generated during the sealing process by compression or tension deformation, but also adjust the sealing pressure by compression or tension according to the thickness and material difference of the base material, so that the sealing pressure can always be within a better range; the elastic member is extended along the width direction and is sleeved on the guide member. The guide member can not only guide the deformation direction of the elastic member, so that the elastic member can always generate elastic force along the width direction, but also make the elastic force of the elastic member evenly distributed between the movable frame and the auxiliary bracket, and the stability of the elastic force output is better.

[0016] According to the edge sealing device of the packaging bag provided in the present application, the pressure adjusting component also includes a pressure driving component fixed to the other end of the movable frame. The pressure driving component is arranged at one end of the guide member close to the movable frame, the driving end is transmission-connected to one end of the elastic member, and the other end of the elastic member abuts against the corresponding end of the auxiliary bracket.

[0017] The above technical solution employs a pressure-driven component disposed at one end of the guide member, with the driving end of the pressure-driven component being in transmission connection with one end of the elastic component. During use, the elastic force of the elastic component can be adjusted by extending and retracting the driving end of the pressure-driven component along its length, depending on the required sealing pressure. This automatically adjusts the elastic force applied by the elastic component to the auxiliary bracket. This solution not only absorbs the impact force applied to the sealing head during the sealing process but also automatically adjusts the sealing pressure applied by the sealing head to the base material.

[0018] According to the edge sealing device for packaging bags provided in the present application, the pressure-driven component is a driving cylinder fixedly connected to the other end of the movable frame, and the driving end extends along the width direction. The elastic component is a spring extending along the width direction and arranged between the driving end of the pressure-driven component and the corresponding end of the auxiliary bracket.

[0019] According to the edge sealing device for packaging bags provided in the present application, the edge sealing assembly also includes a rotating drive component, which is arranged on the frame and located on one side of the sealing head, and the power output end of the rotating drive component is transmission-connected to the sealing head to drive the sealing head to rotate relative to the base material; the rotational linear speed of the sealing head is the same as the moving linear speed of the base material.

[0020] The above technical solution, by providing a rotary drive component, can drive the active rotation of the sealing head. This active rotation of the sealing head not only allows for positional adjustment when the two sides are misaligned, but also applies friction to the base material in the direction of its movement during the active rotation process. This not only prevents the sealing head from hindering the movement of the base material and causing pile-up, but also provides a dragging force for the base material. While ensuring the aesthetics of the packaging bag, it also ensures smooth material conveyance and improves edge sealing efficiency.

[0021] According to the edge sealing device of the packaging bag provided in the present application, the edge sealing assembly also includes a pressing component; the pressing component is arranged on the supporting assembly, is located in the sealing area in the width direction, is arranged opposite to the sealing head and clamps the two side edges of the base material together in the sealing area.

[0022] By adopting the above technical solution, a pressing component is provided on the opposite side of the sealing head. When the base material is subjected to the edge sealing process, it will be clamped between the sealing head and the pressing component. The sealing head and the pressing component can apply sealing pressure to the sealing part of the base material in opposite directions. This not only ensures that the sealing part of the base material has sufficient sealing pressure to achieve sealing, but the joint clamping method of the sealing head and the pressing component can also make the sealing part of the base material smoother, which can further improve the aesthetics of the packaging bag.

[0023] According to the edge sealing device of the packaging bag provided in the present application, the pressing component includes a rolling wheel that can rotate around a rotating shaft perpendicular to the width direction, the rotating shaft is arranged on the frame, and the rolling wheel is rotatably arranged on the rotating shaft through a ceramic bearing, and the outer periphery of the rolling wheel is arranged opposite to the sealing head in the sealing area; a knurled structure is formed on the outer periphery of the rolling wheel.

[0024] The above technical solution, by configuring the pressing component as a roller, which is rotatably mounted on a rotating shaft via ceramic bearings, reduces mechanical resistance during rotation due to the ceramic bearings. This solution not only supports the base material sealing portion but also reduces the resistance of the pressing component to the base material, ensuring smooth material transportation.

[0025] According to the edge sealing device of the packaging bag provided in the present application, the supporting component includes a supporting body, and a first supporting part and a second supporting part movably connected to both sides of the supporting body in the width direction. The first supporting part and the second supporting part extend along the height direction of the supporting component, and a width adjustment mechanism is provided between the first supporting part and the supporting body. The width adjustment mechanism can adjust the distance between the first supporting part and the second supporting part in the width direction.

[0026] By adopting the above technical solution, by configuring the support component to include a first support portion and a second support portion that can be adjusted along the width direction, the width adjustment mechanism can be used to adjust the distance between the first support portion and the second support portion when producing packaging bags of different widths, so that the support component can be adjusted to the size that meets the production requirements. Therefore, this support component has the advantage of a wide range of applications.

[0027] According to the edge sealing device of the packaging bag provided in the present application, the side guiding component includes a first guide plate and a second guide plate arranged side by side and extending along the transport direction of the base material, and the first guide plate and the second guide plate respectively guide the two side edges of the base material into the sealing area; in the transport direction of the base material, the upper end height positions of the first guide plate and the second guide plate are different.

[0028] The above-mentioned technical solution is adopted, by setting the side guide component to include a first guide plate and a second guide plate, and the upper end height positions of the first guide plate and the second guide plate are different. With this structure, when the folded base material is gradually stretched open by the supporting component, the guide plate on the higher side will first guide one side to bend toward the sealing area, and the guide plate on the lower side will then guide the other side to bend toward the sealing area. During the process, since the side guided first has gradually bent to the sealing area, during the guidance of the other side, the side bent first can limit the side bent later, which is conducive to aligning the edge of the side bent later with the edge of the side guided first.

[0029] According to the edge sealing device of the packaging bag provided in the present application, when the two side edges of the base material enter the sealing area with the edges overlapping through the guidance of the first guide plate and the second guide plate, the upper end height of the first guide plate corresponding to the side edge of the base material closer to the sealing head is lower than the upper end height of the second guide plate corresponding to the other side edge of the base material.

[0030] By adopting the above technical solution, when the two side edges enter the sealing area in an edge-overlapping state, the side edge closer to the sealing head is located on the side closer to the outside. In this application, the upper end height of the first guide plate corresponding to the side edge closer to the sealing head in the base material is lower than the upper end height of the second guide plate corresponding to the other side edge in the base material. When the base material is gradually stretched open by the supporting component, the side edge away from the sealing head will first be guided by the second guide plate and adhered to the second guide plate. Then, the first guide plate guides the side edge closer to the sealing head to cover the outside of the side edge away from the sealing head. This can avoid the two side edges from interfering with each other during the overlapping process.

[0031] According to the edge sealing device for packaging bags provided in the present application, when viewed along the transport direction of the base material, the outer wall surface of the first guide plate is closer to the sealing head than the outer wall surface of the second guide plate.

[0032] With this technical solution, by positioning the outer wall of the first guide plate closer to the sealing head than the outer wall of the second guide plate, the offset space between the first and second guide plates provides sealing space for the two overlapping sides. Furthermore, the first and second guide plates form a stepped portion, which can also limit the position of one of the sides, thereby further facilitating sealing of the two sides at the desired sealing position.

[0033] According to the edge sealing device for packaging bags provided in the present application, the width direction is the horizontal direction, the height direction of the supporting component is the vertical direction, and the transport direction of the base material is the vertical direction.

[0034] By adopting the above technical solution, the height direction of the supporting component is set in the vertical direction, and the transportation direction of the base material is also in the vertical direction. In this way, when the base material enters the supporting component or moves away from the supporting component, its own gravity can make the base material move more smoothly.

[0035] The present application also provides a packaging bag making device, including a base material supply device, a base material folding device, an edge sealing device of the above structure, an edge inserting device, and a bottom cutting device arranged in sequence along the transportation direction of the base material; the base material supply device is used to gradually transport the rolled material on the material roller to the base material folding device, the base material folding device is used to fold a single sheet of base material in half and move it to the edge sealing device, the edge sealing device is used to seal the folded base material and form a tubular structure, the edge inserting device is used to insert both sides of the tubular base material to fold it inward, and the bottom cutting device is used to cut the folded tubular base material into single bag units.

[0036] By adopting the above technical solution, since the packaging bag making equipment provided by the present application includes the edge sealing device of the above structure, the edge sealing device of the above structure can not only use the side guiding components to guide the side to be sealed to the sealing area, but also even when the two side edges may be misaligned during the sealing process due to factors such as the guiding error of the side guiding components, the two side edges to be sealed can be dynamically adjusted by using a sealing head that can rotate around the width direction, so that the two side edges to be sealed can always be sealed in a more accurate joining manner, avoiding wrinkles or sealing failures in the sealing part of the bag body during the packaging bag making process, which is not only beneficial to improving the aesthetics of the packaging bag, but also can improve the yield of the packaging bag making equipment when producing packaging bags in batches. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the three-dimensional structure of a packaging bag making device provided in an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the three-dimensional structure of an edge sealing device for a packaging bag provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the three-dimensional structure of an edge sealing assembly in an edge sealing device for a packaging bag provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the force acting on a sealing head in an edge sealing device for a packaging bag provided by an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the partial structure of a sealing head and a pressing component in an edge sealing device for a packaging bag provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the three-dimensional structure of a supporting component in an edge sealing device for a packaging bag provided by an embodiment of the present invention.

[0043] Description of reference numerals:

[0044] 10. Base material supply device;

[0045] 20. Base material folding device;

[0046] 30. Edge sealing device;

[0047] 31. Rack;

[0048] 32. Support component; 320. Support body; 321. First support portion; 322. Second support portion; 323. Width adjustment mechanism;

[0049] 33. Side guide member; 331. First guide plate; 332. Second guide plate;

[0050] 34. Edge banding assembly; 341. Sealing head; 342. Moving frame; 343. Auxiliary support; 350. Rotation drive component; 360. Pressure adjustment component; 361. Pressure drive member; 362. Elastic member; 363. Guide member; 370. Pressing component;

[0051] 40. Edge inserting device;

[0052] 50. Back cover cutting device. DETAILED DESCRIPTION

[0053] Edge sealing is a key link in the production process of packaging bags, and plays a vital role in the performance, quality and use effect of packaging bags. Common edge sealing processes include hot melt adhesive edge sealing process, heat sealing process, ultrasonic edge sealing process, etc.

[0054] The hot melt adhesive edge sealing process refers to heating and melting the hot melt adhesive, applying it to the edge of the packaging bag, and then using pressure to bond the glue to the material, forming a seal after cooling.

[0055] The heat sealing process refers to the use of heat to intensify the movement of the molecular chains of packaging materials such as plastic films. When a certain temperature is reached, the materials soften and fuse together under pressure, forming a firm seal after cooling.

[0056] The ultrasonic edge sealing process refers to the process of generating high-frequency vibrations through an ultrasonic generator, which is converted into mechanical vibrations by a transducer and transmitted to the welding head. Under the action of pressure and vibration, intense friction between molecules of the packaging material is generated, causing heat, and the packaging material is sealed after reaching a molten state.

[0057] For the above different edge sealing processes, the sealing head needs to apply a certain pressure to the sealing part of the packaging bag base material to achieve sealing during the edge sealing process, and the base material docking position needs to be accurately docked, otherwise the packaging bag may have wrinkles or sealing failure.

[0058] To this end, the present application provides a packaging bag edge sealing device that can be used in various edge sealing processes, such as hot melt adhesive edge sealing, heat sealing, and ultrasonic edge sealing, to achieve edge sealing of various packaging bags, such as vest bags and paper bags. The edge sealing device includes a support assembly and an edge sealing assembly. During the production process of the packaging bag, the base material from the upstream process is folded in half and enters the edge sealing device. Furthermore, the base material entering the edge sealing device is first supported by the support components of the support assembly to form a layered structure. The side guide components are then used to guide the two side edges of the base material that need to be sealed together, so that the side edges that need to be sealed gradually approach and enter the edge sealing assembly. The edge sealing device provided by the present application can not only use the side guiding components to guide the sides to be sealed to the sealing area, but also use the sealing head that can rotate around the width direction to dynamically adjust the two sides to be sealed even when the two sides may be misaligned after entering the edge sealing component due to factors such as the guiding error of the side guiding components, so that the two sides to be sealed can always be sealed in a more accurate joining manner, avoiding wrinkles or sealing failures in the sealing part of the bag body during the packaging bag production process, which is not only beneficial to improving the aesthetics of the packaging bag, but also can improve the yield rate of packaging bags during batch production.

[0059] In order to more clearly introduce the packaging bag making equipment and the packaging bag edge sealing device provided in this application, they are described below with reference to the accompanying drawings.

[0060] First, the packaging bag making equipment is introduced, such as Figure 1 As shown, the packaging bag making equipment includes a base material feeding device 10, a base material folding device 20, an edge sealing device 30, an edge inserting device 40, and a bottom sealing cutting device 50, which are arranged in sequence along the transportation direction of the base material; the base material feeding device 10 is used to gradually convey the roll material on the material roller to the base material folding device 20, the base material folding device 20 is used to fold a single sheet of base material in half and move it to the edge sealing device 30, the edge sealing device 30 is used to seal the folded base material and form a cylindrical structure, the edge inserting device 40 is used to insert both sides of the cylindrical base material to fold it inward, and the bottom sealing cutting device 50 is used to cut the folded cylindrical base material into single bag units.

[0061] The base material supply device 10 is a device for continuously conveying coiled materials. The specific structure is not limited. For example, a reeling roller group with a tension control mechanism can be used to ensure the stability of base material conveying by adjusting the reeling speed and the synchronization of the pulling roller.

[0062] The base material folding device 20 refers to a mechanism for folding a single layer of base material along the center line. The specific structure is not limited. For example, a V-shaped guide plate or a rotating folding roller can be used to guide the two sides of the base material to move closer to the middle to complete the folding action.

[0063] The edge sealing device 30 refers to a component for heat-sealing or ultrasonically sealing the side edges of the folded base material, and specifically can adopt a rotary sealing head 341 with a dynamic adjustment function.

[0064] The edge insertion device 40 refers to a mechanism for folding both sides of the tubular base material inward. The specific structure is not limited. For example, an inserting plate with a guide groove or a pneumatic push rod structure can be used to form an inward folding structure on the side through a mechanical insertion action.

[0065] The bottom sealing and cutting device 50 refers to a component for sealing and cutting the bottom of the continuous tubular base material. The specific structure is not limited. For example, a combination structure of a heat sealing knife and a cutting knife can be used to achieve integrated sealing and cutting operations through synchronous driving.

[0066] Specifically, the base material supply device 10 unwinds the coiled material via an unwinding roller assembly and conveys it to the base material folding device 20. The folding device utilizes guide plates or rollers to fold the base material along its longitudinal centerline, forming a double-layer structure. The folded base material then enters the edge sealing device 30. The side guide components 33 align the edges of the double-layer base material and guide it to the sealing area. The sealing head 341 rotates synchronously with the base material movement, dynamically adjusting the sealing pressure and position to ensure edge joining accuracy. After edge sealing, the tubular base material enters the edge inserting device 40. Insert plates or push rods fold the two sides inward to form an inward folded structure. Finally, the bottom sealing and cutting device 50 seals the bottom of the tubular base material and cuts it into independent bag units.

[0067] The edge sealing device 30 is described in detail below:

[0068] like Figure 2 and Figure 3 As shown, the edge sealing device 30 provided in the present application includes a support assembly and an edge sealing assembly 34. The support assembly is arranged on a frame 31, and includes a support component 32 and a side guide component 33 arranged on one side of the support component 32 in the width direction of the frame 31. The support component 32 supports the folded base material from the upstream into a three-dimensional layered structure, and the two side edges of the base material are guided by the side guide component 33 and are in contact with each other. The edge sealing assembly 34 is arranged on the frame 31, on the side of the side guide component 33 away from the support component 32. The edge sealing assembly 34 includes a sealing head 341 that can rotate around the width direction. Moreover, when viewed along the width direction, the two side edges of the base material that are in contact with each other pass through the sealing area of ​​the sealing head 341 and are sealed together by the sealing head 341.

[0069] Specifically, the support component 32 is a mechanical structure with a three-dimensional layered support function. Its function is to support the folded base material in a three-dimensional layered state to facilitate edge sealing. The side guide component 33 is a guide device that controls the movement trajectory of the base material edge and can adopt an inclined guide plate. The sealing head 341 can be a rotating component that performs heat sealing, ultrasonic sealing, or compression sealing. For example, it can be a cylindrical roller with an internal heating element. Its rotation axis is parallel to the width of the frame 31, and it completes the sealing by squeezing the base material from the outside.

[0070] During the bag-making process, the base material from the upstream process is folded in half and enters the edge-sealing device 30. The base material entering the edge-sealing device 30 is first supported by the support component 32 in the support assembly to form a layered structure. The side guide components 33 then guide the two sides of the base material to be sealed together, gradually approaching each other and entering the edge-sealing assembly 34. Furthermore, the two sides entering the edge-sealing assembly 34 meet and are sealed by the edge-sealing assembly 34, resulting in a cylindrical structure for the base material.

[0071] Since the edge sealing assembly 34 in the present application includes a sealing head 341 that can rotate around the width direction, even if the two sides that need to be sealed together are misaligned in the transmission direction due to uneven tension or machine setbacks during transmission, the sealing head 341 that can rotate around the width direction provided by the present application can be dynamically adjusted according to the relative positions of the two sides entering the edge sealing assembly 34, ensuring that the edges of the two sides in the edge sealing assembly 34 are connected to each other and the parts where the two sides are connected to each other correspond to each other in the transmission direction, thereby avoiding defects such as leaks in the cylindrical structure due to the non-connection of the side edges, or wrinkles on the cylindrical structure due to the non-correspondence of the parts where the sides are connected. For example, see Figure 4 If the edges of the two sides of the base material entering the edge sealing assembly 34 are not aligned or the alignment position does not pass through the geometric center of the sealing head 341, the contact areas between the two sides and the sealing head 341 will be different. In this case, the friction force between the side with the larger contact area and the sealing head 341 will be greater than the friction force between the other side and the sealing head 341 ( Figure 4 The friction force on the right side is greater than that on the left side). As the base material gradually moves, due to the different friction forces on both sides of the sealing head 341, the sealing head 341 will be dragged and rotated by the side with greater friction (for example Figure 1 The friction force F1 will drag the sealing head 341 to rotate), and as the sealing head 341 rotates, the side with a larger contact area will be dragged by the rotation of the sealing head 341, and its edge will move toward the geometric center position of the sealing head 341 (for example Figure 4The friction force F3 in the sealing head 341 will drag the side with the larger contact area to move to the right). Similarly, the edge of the side with the smaller contact area will also be dragged by the rotation of the sealing head 341 and move toward the geometric center position of the sealing head 341 (for example, Figure 4 The friction force F2 in the seal will drag the side with the larger contact area to the right) until the aligned position of the edges of the two sides passes through the geometric center of the sealing head 341. With this simple structure, the position adjustment of the two sides can be achieved when they are misaligned.

[0072] Therefore, the edge sealing device 30 provided in the present application can not only use the side guiding component 33 to guide the side to be sealed to the sealing area, but also even when the two side edges may be misaligned after entering the edge sealing component 34 due to factors such as the guiding error of the side guiding component 33, the two side edges to be sealed can be dynamically adjusted by using the sealing head 341 that can rotate around the width direction, so that the two side edges to be sealed can always be sealed in a more accurate joining manner, avoiding wrinkles or sealing failures in the sealing part of the bag body during the packaging bag production process, which is not only beneficial to improving the aesthetics of the packaging bag, but also can improve the yield rate during batch production of packaging bags.

[0073] The joining method of the two side edges of the base material is not limited, for example, it can be various methods such as butt joint, overlap joint, etc.

[0074] In one embodiment, the two side edges of the base material are guided by the side guide components 33 and the edges overlap; viewed along the width direction, in the sealing area of ​​the sealing head 341, the movement direction of a side edge of the base material closer to the sealing head 341 is consistent with the direction of the rotational linear speed of the side of the sealing head 341 corresponding to the one side edge.

[0075] Specifically, edge overlap refers to a state in which the two sides partially overlap in the sealing area. Consistent rotational velocity refers to the direction of the tangential velocity of the sealing head 341 in the contact area with the base material being aligned with the conveying direction of the corresponding side edges. Once the two sides of the base material are aligned under the guidance of the side guide components 33, the tangential direction of the contacting side of the sealing head 341 remains aligned with the movement direction of the corresponding side edges during rotation. Because there is no relative sliding between the sealing head 341 and the base material in the contact area, the side material displacement deviations caused by frictional resistance during traditional sealing processes are avoided. Furthermore, the overlapping sides form a continuous and uniform weld under the sealing pressure, effectively eliminating seal wrinkles or false seals caused by misalignment.

[0076] Based on the above structure, since the sealing head 341 is set to a rotatable structure, the moving direction of a side of the base material closer to the sealing head 341 is consistent with the direction of the rotational linear speed of the side of the sealing head 341 corresponding to one side. During the rotation of the sealing head 341, not only can the sealing head 341 be used to adjust the relative position of the two side edges of the base material, but also when the edges of the two sides are overlapped, the consistency of the moving direction of the sealing head 341 and the side of the two sides of the base material closer to the sealing head 341 is utilized, further avoiding the possible obstruction of the movement of the base material caused by the friction resistance between the sealing head 341 and the base material, and further improving the synchronization of the two side edges of the base material in the transmission direction, so that the edges of the two sides are sealed at the expected sealing position as much as possible, which can improve the beauty of the side sealing of the packaging bag and the yield rate of batch production of packaging bags.

[0077] The structure and arrangement of the edge banding assembly 34 are not limited. It can be directly connected to the frame 31 or connected to the frame 31 using auxiliary structures such as a movable frame 342.

[0078] In one embodiment, Figure 2 and Figure 3 As shown, the edge sealing assembly 34 also includes a movable frame 342 movably arranged on the frame 31 along the width direction, and a pressure adjusting component 360 arranged between the movable frame 342 and the sealing head 341; the sealing head 341 is movably arranged on the movable frame 342 along the width direction through an auxiliary bracket 343, and the pressure adjusting component 360 can adjustably apply an extrusion force toward the base material along the width direction to the auxiliary bracket 343.

[0079] Specifically, the movable frame 342 refers to a load-bearing structure that can be displaced as a whole along the width direction. The specific structure and setting method are not strictly required. For example, a combination of a linear slide and a drive motor can be used to automatically adjust the position of the movable frame 342. Alternatively, a hand-cranked screw can be provided, where the movable frame 342 is connected to the nut of the hand-cranked screw. One end of the hand-cranked screw is fixedly connected to a handwheel. By manually rotating the handwheel, the screw rotates, thereby causing the nut to drive the movable frame 342 to move. By adjusting the position of the movable frame 342, coarse positioning of the sealing head 341 along the width direction can be achieved. For example, when producing different bag types, the position of the movable frame 342 can be adjusted first.

[0080] The pressure regulating component 360 refers to a mechanism that can dynamically adjust the force applied. The specific structure is not limited. For example, it can be implemented by a spring, a pneumatic actuator, or a combination of a spring and a pneumatic actuator to generate controllable extrusion pressure through elastic deformation or air pressure changes.

[0081] The auxiliary bracket 343 refers to a transition support structure connecting the sealing head 341 and the movable frame 342 . The specific structure is not limited. For example, a metal frame with guide grooves can be used to enable the sealing head 341 to achieve secondary position fine-tuning based on the movable frame 342 .

[0082] In this application, the extrusion force refers to the force perpendicular to the direction of base material conveying, the purpose of which is to squeeze the two sides closer together so that the two sides are fixed together. The force can be adjusted by the compression amount of the elastic element or the cylinder stroke control.

[0083] Specifically, the widthwise movement of the movable frame 342 enables the sealing head 341 to adapt to the side-sealing requirements of bags of varying sizes. The pressure-adjusting component 360, through elastic deformation or pneumatic drive, generates a controllable thrust, pushing the auxiliary frame 343 to move the sealing head 341 toward the web. If the web thickness changes or its position shifts, the pressure-adjusting component 360 automatically compensates for the displacement, ensuring that the sealing head 341 maintains a predetermined pressure on the overlapping edges of the web.

[0084] In the present application, the sealing head 341 is movably arranged on the movable frame 342 along the width direction through the auxiliary bracket 343, and the movable frame 342 is movably arranged on the frame 31 along the width direction; when in use, the position of the sealing head 341 can be adjusted by adjusting the position of the movable frame 342 in the width direction as a whole to adapt to the side sealing process of bags of different widths.

[0085] In addition, the pressure regulating component 360 can be adjusted to apply an extrusion force toward the base material along the width direction to the auxiliary bracket 343, so that the ironing head always applies a uniform pressure to the base material. For example, when the thickness of the base material changes, or there is a small deviation in the position, the pressure between the sealing head 341 and the base material may not be sufficient to achieve sealing on both sides, or the extrusion force is too large to block the base material and cause stacking. The edge sealing device 30 in the present application uses the pressure regulating component 360 to adjust the extrusion force applied to the auxiliary bracket 343, so that the sealing head 341 and the base material always maintain a uniform force between each other, and on the basis of ensuring stable extrusion and sealing of both sides of the base material, it will not affect the normal transportation of the base material.

[0086] The arrangement of the movable frame 342 and the auxiliary frame 343 is not limited.

[0087] In one embodiment, Figure 2 and Figure 3 As shown, one end of the movable frame 342 can be movably connected to the frame 31 along the width direction, one end of the auxiliary bracket 343 is connected to the other end of the movable frame 342 through the pressure adjustment component 360, and the sealing head 341 can be rotatably arranged around the width direction at the other end of the auxiliary bracket 343.

[0088] The structure of the pressure regulating component 360 is not limited, and it can be various pressure regulating components 360 such as a spring, a cylinder, a linear motor, etc.

[0089] In one embodiment, Figure 2 and Figure 3 As shown, the pressure regulating component 360 includes a guide member 363 and an elastic member 362. The guide member 363 is extended along the width direction and is arranged between the other end of the movable frame 342 and the corresponding end of the auxiliary bracket 343, and the other end of the movable frame 342 and / or the corresponding end of the auxiliary bracket 343 can move along the guide member 363; the elastic member 362 is extended along the width direction and is sleeved on the guide member 363, and its two ends are respectively connected to the other end of the movable frame 342 and the corresponding end of the auxiliary bracket 343 through transmission.

[0090] Specifically, the guide member 363 refers to a guiding component that limits the deformation direction of the elastic member 362, and can be implemented by a guide rod or guide column structure to ensure that the compression direction of the elastic member 362 is always parallel to the width direction.

[0091] The elastic member 362 refers to a pressure transmission element that generates elastic deformation, and can be specifically implemented by a coil spring or a disc spring, and is used to absorb the impact force during the sealing process and adaptively adjust the extrusion force.

[0092] Both the movable frame 342 and the auxiliary frame 343 can be configured to move along the guide member 363, or the auxiliary frame 343 can be configured to move along the guide member 363; for example, one end of the guide member 363 is fixedly connected to the movable frame 342, and the corresponding end of the auxiliary frame 343 is slidably connected to the guide member 363.

[0093] During use, the sliding movement of the movable frame 342 along the width of the frame 31 forms the first level of position adjustment, while the auxiliary bracket 343 forms the second level of pressure adjustment with the movable frame 342 via the pressure adjustment component 360. When the base material enters the sealing area, the elastic member 362 undergoes compression deformation based on the thickness difference of the base material. Its elastic force is evenly transmitted to the auxiliary bracket 343 via the guide member 363, pushing the sealing head 341 to maintain a constant contact pressure with the side of the base material. The guide member 363 constrains the deformation direction of the elastic member 362. Under the push of the elastic member 362, the auxiliary bracket 343 moves slightly along the guide member 363, compensating for position fluctuations during the transport of the base material, ensuring that the sealing head 341 is always aligned with the side overlap area.

[0094] The present application configures the pressure regulating component 360 to include a guide member 363 and an elastic member 362. The elastic member 362 can not only absorb the impact force generated during the sealing process by compression or tension deformation, but also adjust the sealing pressure by compression or tension according to the thickness and material difference of the base material, so that the sealing pressure can always be within a better range; the elastic member 362 is extended and sleeved on the guide member 363 in the width direction. The guide member 363 can not only guide the deformation direction of the elastic member 362, so that the elastic member 362 can always generate elastic force in the width direction, but also make the elastic force of the elastic member 362 evenly distributed between the movable frame 342 and the auxiliary frame 343, and the stability of the elastic force output is better.

[0095] In the present application, the pressure regulating component 360 is not limited to the above structure. Furthermore, the pressure regulating component 360 also includes a pressure driving component 361 fixed to the other end of the movable frame 342. The pressure driving component 361 is arranged at the end of one side of the guide component 363 close to the movable frame 342, and the driving end is transmission-connected to one end of the elastic component 362. The other end of the elastic component 362 abuts against the corresponding end of the auxiliary bracket 343.

[0096] Specifically, the pressure-driven member 361 is a device for generating a linear driving force, and can be implemented as a drive cylinder or electric push rod. Its driving end extends along the width direction and is connected to the elastic member 362, which is used to adjust the compression of the elastic member 362. When the driving end of the pressure-driven member 361 expands and contracts along the width direction, the compression of the elastic member 362 changes, thereby changing the elastic force applied to the auxiliary bracket 343. When the sealing head 341 contacts the base material, the elastic force of the elastic member 362 is transmitted to the sealing area through the auxiliary bracket 343, forming a stable sealing pressure. When the thickness or material of the base material changes, the pressure-driven member 361 can automatically adjust the compression of the elastic member 362, thereby automatically adjusting the elastic force applied by the elastic member 362 to the auxiliary bracket 343. Utilizing this solution, not only can the impact force applied to the sealing head 341 during the sealing process be absorbed, but the sealing pressure applied by the sealing head 341 to the base material can also be automatically adjusted.

[0097] Furthermore, the pressure driving component 361 is a driving cylinder fixedly connected to the other end of the movable frame 342 and the driving end extends along the width direction, and the elastic component 362 is a spring extending along the width direction and arranged between the driving end of the pressure driving component 361 and the corresponding end of the auxiliary bracket 343.

[0098] Specifically, the drive cylinder is an actuator that generates linear thrust through pneumatic drive. Its fixed end is rigidly connected to the mobile frame 342, and its driving end telescopes across the width of the base material, transmitting a compressive force to the auxiliary support 343. A spring is a mechanical component that absorbs energy or cushions impact through elastic deformation. Specifically, a coil spring or disc spring can be used. Its ends are connected to the cylinder's driving end and the end of the auxiliary support 343, respectively. It transmits the cylinder's thrust while also buffering pressure fluctuations during the movement of the base material. The drive cylinder is fixed to the mobile frame 342, with its driving end extending across the width of the base material and connected to one end of the spring. The other end of the spring abuts the end of the auxiliary support 343. When the cylinder's driving end extends, thrust is transmitted to the auxiliary support 343 via the spring, pressing the sealing head 341 against the side of the base material. If the base material experiences thickness variations or positional shifts during transport, the spring absorbs these pressure fluctuations through elastic deformation. The spring's elastic coefficient can be selected based on the base material's material. The two work together to adjust the sealing pressure.

[0099] Based on the edge sealing component 34 of the above structure, in this application, as Figure 2 and Figure 3 As shown, the edge sealing assembly 34 also includes a rotary drive component 350, which is arranged on the frame 31 and located on one side of the sealing head 341, and the power output end of the rotary drive component 350 is transmission-connected with the sealing head 341 to drive the sealing head 341 to rotate relative to the base material; the rotational linear speed of the sealing head 341 is the same as the moving linear speed of the base material.

[0100] The rotary drive component 350 is a device capable of providing rotational power to the sealing head 341. Specifically, it can be a servo motor or a stepper motor. Its power output end can be connected to the sealing head 341 through a transmission structure such as a gear set or a pulley set. The linear speed of the sealing head 341 and the linear speed of the base material are the same, meaning that their linear speeds remain dynamically consistent within the sealing area. Specifically, the linear speed of the sealing head 341 and the linear speed of the base material can be adjusted by adjusting the motor speed or the reduction ratio of the transmission mechanism to achieve the same linear speed.

[0101] The present application provides a rotary drive component 350 that can drive the sealing head 341 to actively rotate. This active rotation of the sealing head 341 not only allows for positional adjustment when the two sides are misaligned, but also applies frictional force to the base material in the direction of its movement during the active rotation process. This prevents the sealing head 341 from hindering the movement of the base material and causing it to pile up, and also provides a dragging force for the movement of the base material. While ensuring the aesthetics of the packaging bag, the base material can also be smoothly conveyed, improving edge sealing efficiency.

[0102] Furthermore, if Figure 2 and Figure 3 、 Figure 5 As shown, the edge sealing assembly 34 further includes a pressing component 370 ; the pressing component 370 is arranged on the supporting assembly, located in the sealing area in the width direction, arranged opposite to the sealing head 341 and clamping the two side edges of the base material together in the sealing area.

[0103] The pressing component 370 is an auxiliary mechanism that creates a clamping force with the sealing head 341. For example, it can be a rotating roller or turntable. This component is mounted on a rotating shaft via ceramic bearings. The knurled structure on its outer circumference increases friction with the base material. The sealing area refers to the linear contact area between the sides of the base material where heat pressing or ultrasonic welding is applied. This can be adjusted by adjusting the spacing between the pressing component 370 and the sealing head 341.

[0104] When the two sides of the base material enter the sealing area, the pressing component 370 and the sealing head 341 form a clamping structure arranged relative to each other. During transport, the base material's sides are guided into the gap between the two. At this point, the rolling wheel rotates in conjunction with the rotation of the sealing head 341, applying a continuous clamping force to the base material. In this clamped state, the edges of the base material's sides are restrained in a predetermined position. This not only ensures sufficient sealing pressure at the base material's sealing area, but the combined clamping of the sealing head 341 and the pressing component 370 also creates a smoother, more aesthetically pleasing surface.

[0105] In one embodiment of the pressing component 370, the pressing component 370 includes a rolling wheel that can rotate around a rotating shaft perpendicular to the width direction, the rotating shaft is set on the frame 31, the rolling wheel is rotatably set on the rotating shaft through a ceramic bearing, and the outer periphery of the rolling wheel is arranged opposite to the sealing head 341 in the sealing area; the outer periphery of the rolling wheel is formed with a knurled structure.

[0106] The rolling wheel refers to a rotating component with a cylindrical outer circumference, whose axis is perpendicular to the transport direction of the base material. Specifically, it can be made of a surface hard alloy material and applies dynamic pressure to the base material by rotating around the axis.

[0107] The knurling structure refers to the regular concave and convex patterns processed on the metal surface. Specifically, diamond knurling or straight knurling can be used. It can increase the friction coefficient of the contact surface between the rolling wheel and the base material to prevent the base material from slipping.

[0108] The rolling wheel is connected to the rotating shaft via a ceramic bearing. It passively rotates with the base material during transport. The low friction of the ceramic bearing prevents excessive resistance to the base material. The rolling wheel and the sealing head 341 form a relative clamping area. When the two sides of the base material enter this area, the friction generated by the knurled structure constrains the base material's lateral displacement. Simultaneously, the dynamically rotating rolling wheel applies sealing pressure evenly to the overlapping area of ​​the base material. The synchronized action of the knurled structure and the sealing head 341 creates a stable sealing pressure distribution, which improves the yield rate when sealing thin layers of base material at high speeds.

[0109] In the present application, the depth of the knurling structure on the surface of the rolling wheel can be set to 0.1 mm to 0.3 mm, and the distance between adjacent patterns can be 1 mm to 2 mm. The distance between the rolling wheel and the sealing head 341 is set to between 1 base material thickness and 2 base material thicknesses.

[0110] The structure of the support component 32 is not limited. For example, it can be a support mold configured as an integral structure or a support mold configured as a split structure.

[0111] In one embodiment, the support component 32 includes a support body 320, and a first support portion 321 and a second support portion 322 that are movably connected to both sides of the support body 320 in the width direction. The first support portion 321 and the second support portion 322 extend along the height direction of the support component 32, and a width adjustment mechanism 323 is provided between the first support portion 321 and the support body 320. The width adjustment mechanism 323 can adjust the distance between the first support portion 321 and the second support portion 322 in the width direction.

[0112] The structures of the first support portion 321 and the second support portion 322 are not limited, for example, they can be set as a frame structure, and the width adjustment mechanism 323 can be set as any one of various adjustment mechanisms such as a screw mechanism, a gear rack mechanism, etc. This application does not make the only requirement for this.

[0113] The present application provides a support member 32 comprising a first support portion 321 and a second support portion 322 that can be adjusted along the width direction. When producing packaging bags of different widths, the width adjustment mechanism 323 can be used to adjust the distance between the first support portion 321 and the second support portion 322, so that the support member 32 can be adjusted to a size that meets the production requirements. Therefore, this support member 32 has the advantage of a wide range of applications.

[0114] It should be understood that the side guide component 33 can be set on the first support part 321 or on the second support part 322, specifically, it can be set on one of the two support parts close to the edge banding assembly 34, and the side guide component 33 is fixedly connected to the support part. When the position of the first support part 321 and the second support part 322 is adjusted, the side guide component 33 is adjusted synchronously. Similarly, the pressing component 370 can be set on one of the support parts where the side guide component 33 is located, and when the position of the first support part 321 and the second support part 322 is adjusted, the pressing component 370 is also adjusted synchronously. For example, see Figure 6 In one embodiment of the present application, the side guide component 33 and the pressing component 370 are both arranged on the second support portion 322.

[0115] The structure of the side guide component 33 is not limited, and it can be set as an integrated structure or a split structure.

[0116] In one embodiment, Figure 6 As shown, the side guide member 33 includes a first guide plate 331 and a second guide plate 332 arranged side by side and extending in the direction of transport of the base material. The first guide plate 331 and the second guide plate 332 respectively guide the two side edges of the base material into the sealing area. In the direction of transport of the base material, the top ends of the first guide plate 331 and the second guide plate 332 are positioned at different heights. During installation, the first guide plate 331 and the second guide plate 332 can be fixedly connected to the second support portion 322.

[0117] By setting the side guide component 33 to include a first guide plate 331 and a second guide plate 332, and the upper end height positions of the first guide plate 331 and the second guide plate 332 are different, using this structure, when the folded base material is gradually stretched open by the support component 32, the guide plate on the higher side will first guide one side to bend toward the sealing area, and the guide plate on the lower side will then guide the other side to bend toward the sealing area. During the process, since the side that was guided first has gradually bent to the sealing area, during the process of the other side being guided, the side that was bent first can limit the side that is bent later, which is conducive to aligning the edge of the side that is bent later with the edge of the side that was guided first.

[0118] Furthermore, when the two side edges of the base material are guided by the first guide plate 331 and the second guide plate 332 to enter the sealing area in an edge-overlapping state, the upper end height positions of the first guide plate 331 and the second guide plate 332 can be set as: the upper end height of the first guide plate 331 corresponding to a side edge of the base material closer to the sealing head 341 is lower than the upper end height of the second guide plate 332 corresponding to the other side edge of the base material.

[0119] Specifically, when the two side edges enter the sealing area in an edge-overlapping state, the side edge closer to the sealing head 341 is located closer to the outside. In this application, the upper end height of the first guide plate 331 corresponding to the side edge closer to the sealing head 341 in the base material is lower than the upper end height of the second guide plate 332 corresponding to the other side edge in the base material. When the base material is gradually stretched open by the supporting component 32, the side edge away from the sealing head 341 will first be guided by the second guide plate 332 and adhere to the second guide plate 332. Then, the first guide plate 331 guides the side edge closer to the sealing head 341 to cover the side edge away from the sealing head 341, so as to avoid interference between the two side edges during the overlapping process.

[0120] Furthermore, when viewed along the transport direction of the base material, the outer wall surface of the first guide plate 331 is closer to the sealing head 341 than the outer wall surface of the second guide plate 332 .

[0121] Specifically, by positioning the outer wall of the first guide plate 331 closer to the sealing head 341 than the outer wall of the second guide plate 332, the offset space between the first and second guide plates 331, 332 provides sealing space for the two overlapping sides. Furthermore, the first and second guide plates 331, 332 form a stepped portion that can also limit the position of one of the sides, thereby further facilitating the sealing of the two sides at the desired sealing position.

[0122] In the present application, the width direction is the horizontal direction, the height direction of the support member 32 is the vertical direction, and the conveying direction of the base material is the vertical direction.

[0123] In the present application, the height direction of the support component 32 is set in the vertical direction, and the transportation direction of the base material is also in the vertical direction. In this way, when the base material enters the support component 32 or moves away from the support component 32, its own gravity can make the base material move more smoothly.

[0124] It should be noted that, in addition to the embodiments of the present invention described in the above specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention is introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the above description contains many specific details, and the present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0125] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0126] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when in 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, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0127] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0128] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0129] Although the present invention has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood by those skilled in the art that the above description is provided as a further detailed description of the present invention in conjunction with specific embodiments thereof, and that the specific implementation of the present invention is not limited to these descriptions. Those skilled in the art may make various changes in form and details, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A packaging bag edge sealing device, characterized in that: include: a support assembly, the support assembly being disposed on the frame, the support assembly comprising a support member and a side guide member disposed on one side of the support member in the width direction of the frame, the support member supporting the folded base material from upstream into a three-dimensional layered structure, with two side edges of the base material being guided by the side guide member and in contact with each other at their edges; and An edge sealing assembly is provided on the frame and is located on a side of the side guide component away from the support component; The edge sealing assembly includes a sealing head that can rotate around the width direction; and, viewed along the width direction, the two side edges of the base material that are in contact with each other pass through the sealing area of ​​the sealing head and are sealed together by the sealing head; and, The two side edges of the base material are guided by the side guide components and the edges are overlapped. Viewed along the width direction, in the sealing area of ​​the sealing head, the moving direction of a side edge of the base material closer to the sealing head is consistent with the direction of the rotational linear speed of the sealing head corresponding to the side edge, and the rotational linear speed of the sealing head is the same as the moving linear speed of the base material.

2. The edge sealing device for packaging bags according to claim 1, characterized in that: The edge sealing assembly further comprises a movable frame movably arranged on the frame along the width direction, and a pressure regulating component arranged between the movable frame and the sealing head; wherein, The sealing head is movably arranged on the movable frame along the width direction via an auxiliary frame, and the pressure adjustment component is adjustable to apply an extrusion force toward the base material along the width direction to the auxiliary frame.

3. The edge sealing device for packaging bags according to claim 2, characterized in that: in One end of the movable frame is movably connected to the frame along the width direction, one end of the auxiliary frame is connected to the other end of the movable frame via the pressure adjustment component, and the sealing head is rotatably provided at the other end of the auxiliary frame around the width direction; and The pressure adjustment component includes a guide member and an elastic member, wherein the guide member is provided between the other end of the movable frame and the corresponding end of the auxiliary bracket and extends along the width direction, and the other end of the movable frame and / or the corresponding end of the auxiliary bracket can move along the guide member; and The elastic component is extended along the width direction and sleeved on the guide component, and both ends of the elastic component are respectively transmission-connected with the other end of the movable frame and the corresponding end of the auxiliary bracket.

4. The edge sealing device for packaging bags according to claim 3, characterized in that: The pressure regulating component also includes a pressure driving component fixed to the other end of the movable frame. The pressure driving component is arranged at one end of the guide member close to the movable frame, and the driving end is transmission-connected to one end of the elastic component. The other end of the elastic component abuts against the corresponding end of the auxiliary bracket.

5. The edge sealing device for packaging bags according to claim 4, characterized in that: The pressure driving component is a driving cylinder fixedly connected to the other end of the movable frame, and the driving end extends along the width direction. The elastic component is a spring extending along the width direction and arranged between the driving end of the pressure driving component and the corresponding end of the auxiliary bracket.

6. The edge sealing device for packaging bags according to claim 2, characterized in that: The edge sealing assembly further includes a rotary drive component, which is disposed on the frame and located on one side of the sealing head, and a power output end of the rotary drive component is transmission-connected to the sealing head to drive the sealing head to rotate relative to the base material.

7. The edge sealing device for a packaging bag according to claim 2, characterized in that: The edge sealing assembly further includes a pressing component; wherein The pressing component is provided on the supporting assembly, is located in the sealing area in the width direction, is arranged opposite to the sealing head, and clamps two side edges of the base material in the sealing area.

8. The edge sealing device for packaging bags according to claim 7, characterized in that: in The pressing component includes a rolling wheel rotatable around a rotating shaft perpendicular to the width direction, the rotating shaft is provided on the frame, the rolling wheel is rotatably provided on the rotating shaft via a ceramic bearing, and the outer periphery of the rolling wheel is arranged opposite to the sealing head in the sealing area; and, A knurling structure is formed on the outer periphery of the rolling wheel.

9. The edge sealing device for a packaging bag according to any one of claims 1 to 8, characterized in that: The supporting component includes a supporting body, and a first supporting portion and a second supporting portion movably connected to both sides of the supporting body in the width direction. The first supporting portion and the second supporting portion extend along the height direction of the supporting component, and a width adjustment mechanism is provided between the first supporting portion and the second supporting portion and the supporting body. The width adjustment mechanism can adjust the distance between the first supporting portion and the second supporting portion in the width direction.

10. The edge sealing device for a packaging bag according to any one of claims 1 to 8, characterized in that: The side guide component includes a first guide plate and a second guide plate arranged side by side and extending along the transport direction of the base material, the first guide plate and the second guide plate respectively guide the two side edges of the base material into the sealing area; and In the conveying direction of the base material, the upper ends of the first guide plate and the second guide plate are at different height positions.

11. The edge sealing device for a packaging bag according to claim 10, characterized in that: When the two side edges of the base material enter the sealing area with their edges overlapping via the guidance of the first guide plate and the second guide plate, the upper end height of the first guide plate corresponding to a side edge of the base material closer to the sealing head is lower than the upper end height of the second guide plate corresponding to the other side edge of the base material.

12. The edge sealing device for a packaging bag according to claim 11, characterized in that: When viewed along the transport direction of the base material, the outer wall surface of the first guide plate is closer to the sealing head than the outer wall surface of the second guide plate.

13. The edge sealing device for a packaging bag according to any one of claims 1 to 8, characterized in that: in The width direction is a horizontal direction, the height direction of the supporting component is a vertical direction, and the transport direction of the base material is a vertical direction.

14. A packaging bag making device, characterized in that: It comprises a base material supply device, a base material folding device, an edge sealing device, an edge inserting device, and a bottom cover cutting device arranged in sequence along the transport direction of the base material; wherein, The base material supply device is used to gradually convey the roll material on the material roller to the base material folding device, the base material folding device is used to fold the single base material in half and move it to the edge sealing device, the edge sealing device is used to seal the folded base material and form a cylindrical structure, the edge insertion device is used to insert the two sides of the cylindrical base material to fold it inward, and the bottom cutting device is used to cut the folded cylindrical base material into single bag units.

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