Bag body forming system and method for shopping bag, and bag body forming mold

Abstract

A bag body forming system for a shopping bag, comprising a forming mold (310) capable of moving in the vertical direction and a receiving platform (320) located below the forming mold (310). The forming mold (310) comprises a mold body (311) and two first side walls (312) respectively corresponding to two side surfaces (102) of a shopping bag (10). During production, after a base material (20) with pre-formed hems (103) is pressed by the forming mold (310), a grabbing part (3121) of at least one first side wall (312) of the forming mold (310) is used for grabbing a base material side surface (202) at the corresponding side and driving the base material side surface (202) to reciprocate relative to the mold body (311) of the forming mold (310) in the height direction of the mold body (311), so that the hems (103) of the base material (20) at two ends mate with each other in the height direction of the mold body (311). The bag body forming system can produce bag bodies of high supporting strength by means of simplified processes, and enhance the bag opening strength of the bag bodies by means of one-piece bag opening hems. Further provided are a bag body forming method for a shopping bag and a bag body forming mold.

Description

Handbag forming system, method and mold Technical Field

[0001] This invention relates to the field of tote bag production, and in particular to a tote bag body forming system, method and mold. Background Technology

[0002] Tote bags have become an indispensable tool in modern society. Due to their high practicality and portability, people have increasingly diverse requirements for their manufacture. For example, some users want tote bags to be as lightweight and foldable as possible, while others want them to be as sturdy and resistant to deformation. Based on this, tote bags have undergone various improvements in terms of shape, material selection, and handle securing mechanisms.

[0003] Traditional tote bags typically form their bottom by bonding the bottom edges of the side walls together using adhesive (e.g., paper bags) or heat-pressing (e.g., non-woven bags). However, this type of bag's bottom only connects the bottom edges of the side walls. Under heavy loads or prolonged storage, the connection at the bottom can fail, leading to the bag showing through and items falling out. Furthermore, the bag opening is formed directly from the top of the side wall, made of the same material and open to the outside. Its strength is relatively low, and since items enter and exit through this opening, it is a very vulnerable area. Additionally, the handles are usually located at the opening and are often secured to the edge using adhesive or fasteners. However, because the bag opening itself is weak, the connection between the opening and the handle is also weak, often causing users frustration due to breakage at this point. Summary of the Invention

[0004] The purpose of this invention is to solve the defects of existing tote bags, such as the bottom of the bag easily opening and the insufficient strength of the bag opening. Specifically, this invention proposes a novel tote bag body forming system. Tote bags manufactured according to this system directly press the base material of the tote bag using a forming mold, thus creating an integral design between the bag body and the side walls. This avoids the problem of weak connections caused by connecting the lower ends of the side walls together at the bottom. Furthermore, according to the tote bag body forming system proposed by this invention, before pressing the base material of the tote bag using the forming mold, the two ends corresponding to the bag opening are folded inward. After the base material is pressed by the forming mold, the two ends are aligned to form the bag opening, and the end edges are interlocked, thereby forming a complete bag opening fold. With this structure, the strength of the bag opening with the folded edge is significantly enhanced. In addition, by placing the end of the handle inside the folded edge of the bag opening, between the inner fold and the inner wall of the bag, the strength of the bag opening itself and the connection between the bag opening and the handle is effectively strengthened.

[0005] Specifically, the tote bag produced by the above-mentioned bag forming system includes a bottom surface and two side surfaces located on both sides of the bottom surface, with the opposite sides of the two side surfaces overlapping each other. The bag forming system provided by the present invention includes a forming mold movable in a vertical direction and a receiving platform located below the forming mold. The forming mold includes a mold body and two first side walls corresponding to the two side surfaces of the tote bag; the lower end of the mold body is adapted to the shape of the bottom surface of the tote bag, and at least one of the two first side walls of the forming mold is provided with a gripping part adapted to the corresponding side surface of the tote bag, and can reciprocate relative to the mold body along the height direction of the mold body. When forming a bag using the bag forming system provided by the present invention, the substrate for forming the tote bag has pre-folded inwards at both ends in the length direction, is transferred to the receiving platform located directly below the forming mold; the forming mold presses down on the substrate, causing the substrate to bend around the forming mold. The mold has a shaped structure that surrounds the molding die; at least one gripping part of the first sidewall of the molding die grips the corresponding side of the substrate and drives the side of the substrate to move back and forth relative to the mold body along the height direction of the mold body, so that the folded edges at both ends of the substrate interlock with each other in the height direction of the mold body.

[0006] Using the above technical solution, before the substrate is transferred to the receiving platform, its two ends in the length direction are first folded inward to form folded edges. After the forming mold presses down on the substrate, the substrate will bend around the forming mold. The bag is formed by bending the outer ends of the two substrate sides towards each other and overlapping them. In this case, the folded edge of the outer end of one substrate side is located inside the folded edge of the outer end of the other substrate side. If the opposite sides of one substrate side are directly overlapped, the folded edges of the two substrate sides are only connected by their mating surfaces, resulting in a connection strength similar to that without folded edges. This fails to improve the connection strength between the two sides of the bag at the opening.

[0007] In this embodiment, at least one of the two first sidewalls of the forming mold of the bag forming system is provided with a gripping part adapted to the side of the corresponding tote bag. After the substrate surrounds the forming mold, the gripping part of at least one first sidewall grips the corresponding side of the substrate and drives the side of the substrate to move relative to the mold body along the height direction of the mold body, so that the two sides of the substrate form a height difference and the folds of the two are staggered in the height direction. At this time, the folds on the side of the substrate will open at a certain angle from the bending point (which can be pressed with creases in advance) under the action of its own restoring force. Further, at least one first sidewall is linked by the gripping part to return the corresponding side of the substrate to a position flush with the other side of the substrate. During the return process, the upper end of the side of the substrate is inserted from the bending point between the other side of the substrate and the fold, so that the folds at both ends of the substrate are interlocked in the height direction of the mold body. At this time, the opposite sides of the side of the substrate and the other side of the substrate overlap each other, ensuring the connection strength of the sides of the tote bag at the bag opening while completing the bag forming.

[0008] The tote bags produced by this bag forming system have a unique design where the bottom and sides are integrally formed. Compared to existing technologies where the bottom ends of the side walls are glued together to form the bag bottom, this significantly enhances the connection strength between the bottom and sides, improving the bag's support. Furthermore, the integrated gusset at the bag opening increases its strength, reducing the risk of tearing when loading or unloading items.

[0009] Furthermore, this bag forming system allows the pre-formed folded base material to complete the interlocking of the folded edges at both ends of the base material with the mold body height direction during the forming process. This greatly simplifies the bag forming process of bag-shaped bags with folded openings, eliminating the need for an additional folding machine for the bag opening and saving space occupied by the bag forming equipment.

[0010] Furthermore, embodiments of the present invention also disclose a bag forming system for a tote bag, wherein one of the two first sidewalls of the forming mold is provided with a sidewall guide assembly extending in the height direction between it and the mold body, and the other is fixedly disposed on the side of the mold body.

[0011] Using the above technical solution, during the molding process, the gripping part of one of the first sidewalls grips the corresponding side of the substrate and moves the side of the substrate relative to the mold body, so that the folded edge of one side of the substrate is completely offset from the folded edge of the other side of the substrate in the height direction. For example, the upper end of the folded edge at the end of one side of the substrate is lower than the lower end of the folded edge at the end of the other side of the substrate, or the lower end of the folded edge at the end of one side of the substrate is higher than the upper end of the folded edge at the end of the other side of the substrate. Then, when the gripping part of the first sidewall grips the corresponding side of the substrate and moves the side of the substrate back to its original position relative to the mold body, the folded edge of the substrate side located on the lower side will insert between the substrate side located on the higher side and the corresponding folded edge, so that the folded edges at both ends of the substrate can be interlocked with each other in the height direction of the mold body.

[0012] Therefore, a sidewall guide assembly extending along the height direction is provided between one first sidewall and the mold body, and another is fixedly provided on the side of the mold body. This makes the action required for the molding mold to realize the interlocking of the folded edges at both ends of the substrate simpler, and the molding mold has fewer parts, reducing the possibility of failure and improving the service life and reliability of the molding mold.

[0013] In addition, during the process of the first sidewall driving the side of the substrate to return to its original position, it moves at an angle relative to the height direction, which makes it easier for the folded edge of one side of the substrate to interlock with the folded edge of the other side of the substrate.

[0014] Furthermore, another embodiment of the present invention discloses a bag forming system for a tote bag, wherein each of the two first sidewalls of the forming mold is provided with a sidewall guide assembly extending in the height direction between the mold body and the mold body.

[0015] Using the above technical solution, during the molding process, the two first sidewalls respectively drive the corresponding substrate sidewalls to move in opposite directions in the height direction, so that the folds on the two substrate sidewalls are completely staggered in the height direction. For example, one first sidewall drives one substrate sidewall to move downward relative to the mold body, and the other first sidewall drives the other substrate sidewall to move upward relative to the mold body, until the upper end of the fold at the end of one substrate sidewall is lower than the lower end of the fold at the end of the other substrate sidewall. When the two first sidewalls drive the corresponding substrate sidewalls to return to their original positions, the fold at the lower substrate sidewall will be inserted between the upper substrate sidewall and the fold.

[0016] Therefore, a sidewall guide assembly extending in the height direction is provided between the two first sidewalls and the mold body. Since the sides of the substrate will move in opposite directions in the height direction under the linkage of the corresponding first sidewall, compared with the structure of setting a sidewall guide assembly between a first sidewall and the mold body, the stroke of a single first sidewall in the height direction is shorter, the deformation of the substrate on one side is smaller, and the substrate is less likely to be damaged.

[0017] The present invention also discloses a method for forming a tote bag, which utilizes the above-described bag forming system and includes the following steps:

[0018] S1: Die-cut raw material to form a base material for a tote bag. The base material includes a first base material side, a base material middle, and a second base material side in sequence along its length. The base material middle is adapted to the shape of the bottom surface of the tote bag, and the first base material side and the second base material side are adapted to the shapes of the two side walls of the tote bag, respectively. The base material middle is provided with bottom fold protrusions at both ends in the width direction.

[0019] S2: Bend the free ends of the first substrate side and the second substrate side inward along the length direction to form a folded edge;

[0020] S3: The substrate with the folded edge is transferred to the receiving platform, located directly below the forming mold. The forming mold moves vertically, pressing down on the middle of the substrate with its lower end, causing the substrate to bend around the forming mold. Shaped structure and surrounding the molding die;

[0021] S4: The gripping part of at least one first sidewall of the molding die grips the corresponding side of the substrate and drives the side of the substrate to move back and forth relative to the mold body of the molding die along the height direction of the mold body, so that the folded edges at both ends of the substrate are interlocked with each other in the height direction of the mold body.

[0022] Using the above technical solution, this method for forming the bag body of a tote bag involves bending the free ends of the first and second substrate sides inward along their length direction before forming, creating folded edges. Further, after the substrate is transferred to the receiving platform and pressed by the forming mold, at least one gripping part of the first sidewall of the forming mold grips the corresponding substrate side and drives it to reciprocate along the height direction of the mold body relative to the mold body. This allows the folded edges at both ends of the substrate to interlock in the height direction of the mold body, thus completing the tote bag forming process. Compared to existing technologies that use other equipment for secondary processing of the tote bag after forming, and then folding the edges at the bag opening, this method forms the folded edges before the substrate is pressed down by the mold, eliminating the need for secondary processing and significantly improving the production efficiency of tote bags.

[0023] An embodiment of the present invention also discloses a bag forming mold for a tote bag, used in the aforementioned bag forming system. The forming mold includes a mold body, a pair of first sidewalls, and a pair of second sidewalls. The pair of first sidewalls are disposed on opposite sides of the mold body in a first direction, corresponding to two sides of the tote bag. The pair of second sidewalls are disposed on opposite sides of the mold body in a second direction, respectively disposed between opposite ends of each side of the pair of first sidewalls. When viewed along the height direction of the mold body, the outline formed by the pair of first sidewalls and the pair of second sidewalls matches the cross-sectional outer shape of the tote bag. Furthermore, a sidewall guide assembly is provided between at least one first sidewall and the mold body. At least one first sidewall is movable reciprocally along the sidewall guide assembly relative to the mold body in the height direction of the mold body and is provided with a gripping portion adapted to the corresponding side of the tote bag. In an embodiment of the present invention, the first direction is parallel to the length direction of the substrate forming the tote bag, and the second direction is parallel to the width direction of the substrate forming the tote bag.

[0024] Using the above technical solution, this molding die includes a die body, a pair of first sidewalls, and a pair of second sidewalls. When viewed along the height direction of the die body, the outline formed by the pair of first sidewalls and the pair of second sidewalls matches the outer shape of the cross-section of the tote bag. Therefore, when the molding die is driven by the die driving mechanism, and the lower end of the molding die presses the substrate, causing the sides of the substrate to bend and adhere to the respective sidewalls of the molding die, the substrate can be arranged to form the basic shape of the bag.

[0025] Furthermore, when the substrate side has a pre-folded inward edge, the gripping part of at least one first sidewall of the forming die grips the corresponding substrate side and drives the substrate side to reciprocate relative to the die body along the height direction of the die body, so that the folded edges at both ends of the substrate interlock with each other in the height direction of the die body. This forming die can not only stamp the substrate to form the shape of a bag, but also, through the action of at least one first sidewall, can make the pre-folded inward edges on the two substrate sides overlap each other, so that the substrate can simultaneously form a bag opening fold that strengthens the bag opening structure during the forming process. Attached Figure Description

[0026] Figure 1 is a structural schematic diagram of a tote bag provided in an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the bag forming system provided in an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of the molding die, the die driving mechanism and the base support provided in an embodiment of the present invention;

[0029] Figure 4 is a structural schematic diagram of the bottom insert component and the side sealing assembly provided in an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of the substrate located below the molding die according to an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of the structure of the substrate in Figure 5;

[0032] Figure 7 is a schematic diagram of the structure provided in the embodiment of the present invention, in which the substrate is pressed down by the molding die and the bottom fold protrusion is pushed and bent by the bottom insert component;

[0033] Figure 8 is a schematic diagram of the structure of the substrate in Figure 7;

[0034] Figure 9 is a schematic diagram of the structure in which the two opposite ends of the substrate side of the substrate provided in the embodiment of the present invention are pushed and bent by the side insertion component;

[0035] Figure 10 is a schematic diagram of the structure of the substrate in Figure 9;

[0036] Figure 11 is a schematic diagram of the structure of one side of the substrate provided in the embodiment of the present invention being linked to the first sidewall of the molding die and offset from the other side of the substrate.

[0037] Figure 12 is a schematic diagram of the structure of the substrate in Figure 11;

[0038] Figure 13 is a partial schematic diagram of the folded edges on the two substrate sides in Figure 12;

[0039] Figure 14 is a schematic diagram of the structure in which the folded edges of the two substrate sides of the substrate provided in the embodiment of the present invention are interlocked.

[0040] Figure 15 is a schematic diagram of the structure of the substrate in Figure 14;

[0041] Figure 16 is a partial schematic diagram of the folded edges on the two sides of the substrate in Figure 15;

[0042] Figure 17 is a schematic diagram of the molding die provided in an embodiment of the present invention;

[0043] Figure 18 is a schematic diagram of the molding die provided in an embodiment of the present invention from another perspective;

[0044] Figure 19 is a schematic diagram of the structure of the first sidewall and the sidewall guide assembly of the molding die provided in an embodiment of the present invention.

[0045] Figure 20 is a flowchart of the bag forming method provided in an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached drawings: 10. Tote bag; 101. Bottom surface; 102. Side surface; 1021. Connecting surface; 103. Folded edge; 104. Cutout; 105. Handle; 106. Bottom bend; 20. Substrate; 201. Middle part of substrate; 202. Side of substrate; 2021. Side extension of substrate; 203. Bottom fold protrusion; 30. Bag forming system; 310. Forming mold; 311. Mold body; 3110. Body support; 312. First side wall; 3121. Gripping part; 3122. Suction cup; 3123. Guided component; 313. Second side wall; 3131. Air suction hole; 314. Side wall guide assembly; 3141. Side wall drive component; 3142. Guide component; 320. Receiving platform; 330. Mold drive mechanism; 331. Connecting plate; 340. Base support; 350. Bottom insert component; 360. Side sealing assembly; 361. Side insert component; 362. Pressing component; 40. Frame; 50. Length direction of substrate; 60. Width direction of substrate. Detailed Implementation

[0047] Traditional tote bags typically form their bottom by bonding the bottom edges of the side walls together using adhesive (e.g., paper bags) or heat pressing (e.g., non-woven bags). However, this type of tote bag's bottom only connects the bottom edges of the side walls. Under heavy loads or prolonged storage, the connection at the bottom can fail, leading to the bag showing through and items falling out. Furthermore, the bag opening is formed directly from the top of the side wall, made of the same material, and opens outwards. It has relatively low strength, and since items enter and exit through this opening, it is a very vulnerable area and requires high structural strength.

[0048] To address this, the present invention provides a bag forming system for tote bags. This forming system includes a mold body and two first sidewalls corresponding to the two sides of the tote bag. At least one sidewall is provided with a gripping part adapted to the corresponding side of the tote bag and is reciprocating relative to the mold body along the height direction of the mold body. After the pre-formed folded substrate is pressed by the forming mold, the gripping part of at least one first sidewall of the forming mold grips the corresponding side of the substrate and drives the side of the substrate to reciprocate relative to the mold body along the height direction of the mold body, so that the folded edges at both ends of the substrate interlock with each other in the height direction of the mold body. This bag forming system enables the production of bags with high support strength through a simplified process, and the bag opening strength is enhanced by an integrated bag opening fold.

[0049] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0050] To facilitate the explanation of the working principle of the bag forming system, the overall structure of the tote bag will be explained first.

[0051] As shown in Figure 1, the tote bag 10 includes a bottom surface 101 and two side surfaces 102 located on both sides of the bottom surface 101. The opposite ends of the two side surfaces 102 are bent towards each other to form connecting surfaces 1021, and the edges of the two opposite connecting surfaces 1021 are fixedly connected to each other.

[0052] Optionally, the two sides 102 of the tote bag 10 are symmetrically arranged with respect to the bottom surface 101. The opposite ends of the two sides 102 are bent towards each other to form connecting surfaces 1021. At least the outer edge of the folded edge 103 at the upper end of one connecting surface 1021 is inserted between the upper end of the connecting surface 1021 and the folded edge 103 on the other side.

[0053] As described above, in order to improve the strength of the bag opening of the tote bag 10, a bag opening fold 103 can be provided at the bag opening of the tote bag 10. Furthermore, a bag opening crease extending around the bag opening of the tote bag 10 can be formed at the bending position of the bag opening fold 103, and the bag opening of the tote bag 10 is folded inward along the predetermined bag opening crease to form the bag opening fold 103.

[0054] The tote bag 10 can be made of any one of the following materials: non-woven fabric, paper material, or paper-like material. This invention does not limit it to a single material.

[0055] Non-woven fabrics, due to their interwoven fiber structure, possess high durability and can withstand a certain degree of stretching and tearing. For applications requiring high durability and environmental friendliness, non-woven fabrics are a suitable choice. Paper materials, on the other hand, offer excellent printability, easily printing various texts, patterns, and logos at a lower cost. For applications prioritizing cost-effectiveness and printability, paper or paper-like materials can be selected to meet diverse usage needs. It should be noted that the opening of the tote bag 10 can also be equipped with a handle 105 for easy gripping. In fact, the two ends of the handle 105 are fixed between the opening fold 103 and the side 102, thereby enhancing the connection strength between the handle 105 and the bag body. Of course, those skilled in the art can design the connection method between the handle 105 and the bag body according to actual conditions and specific needs; this embodiment does not impose specific limitations on this. Alternatively, a pair of slotted holes can be provided at the opening of the tote bag 10 instead of a handle 105, which also facilitates gripping.

[0056] As shown in Figures 2-4, embodiments of the present invention disclose a bag forming system 30 for a tote bag. This forming system includes a forming mold 310 that can move vertically and a receiving platform 320 located below the forming mold 310. It should be noted that the receiving platform 320 can be a physical platform such as a track or conveyor belt, and has space below the forming mold 310 to avoid downward pressure from the mold. Alternatively, it can be a non-physical platform formed when transferring the substrate 20 using adsorption, pushing, or other methods. The present invention does not specifically limit this. More specifically, as shown in Figure 3, the forming mold 310 includes a mold body 311 and two first sidewalls 312 corresponding to the two sides 102 of the tote bag 10. The lower end of the mold body 311 is shaped to fit the bottom surface 101 of the tote bag 10, and at least one of the two first sidewalls 312 of the forming mold 310 is provided with a gripping part 3121 adapted to the corresponding side surface 102 of the tote bag 10, and can reciprocate relative to the mold body 311 along the height direction of the mold body 311. It should be noted that the forming mold 310 may have a gripping part 3121 adapted to the side 102 of the corresponding tote bag 10 on any one of the first side walls 312, or it may have gripping parts 3121 adapted to the side 102 of the corresponding tote bag 10 on both of the first side walls 312.

[0057] As shown in Figures 5 and 6, in the previous step, the two ends of the substrate 20 forming the tote bag 10 are pre-folded inward to form folded edges 103 along its length (as shown by the first arrow 50 in Figure 6). The substrate 20 is then transferred to the receiving platform 320, located directly below the forming mold 310. The forming mold 310 presses down on the substrate 20, causing the substrate 20 to bend around the forming mold 310. The mold 310 is formed by a shaped structure and surrounds the molding die 310. The gripping part 3121 of at least one first sidewall 312 of the molding die 310 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move back and forth relative to the mold body 311 along the height direction of the mold body 311. Through such movement, the folded edges 103 at both ends of the substrate 20 are interlocked together in the height direction of the mold body 311.

[0058] It should be noted that the inward folding of both ends of the substrate 20 in the length direction means that the two ends of the substrate 20 are bent toward the surface of the side being extruded by the forming mold 310, thereby causing the substrate 20 to be bent by the forming mold 310. When forming the shape, the folded edge 103 is located on the inner surface of the side 202 of the substrate. After forming the tote bag 10, the folded edge 103 of the bag body is located inside the bag body, ensuring that the outer wall of the tote bag 10 is relatively flat and improving the aesthetics of the tote bag 10.

[0059] Specifically, in this embodiment, before the substrate 20 is transferred to the receiving platform 320, its two ends in the length direction are pre-folded inward with flanges 103. After the forming mold 310 presses down on the substrate 20, the substrate 20 will bend around the forming mold 310. The bag body is formed by bending the outer portions of the two substrate sides 202 in the width direction (as shown by the second arrow 60 in Figure 6) towards each other and overlapping the corresponding ends. At this time, the folded edge 103 of the outer end of one substrate side 202 is located inside the folded edge 103 of the outer end of the other substrate side 202. If the opposite sides of one substrate side 202 and the other substrate side 202 are directly overlapped, the folded edges 103 of the two substrate sides 202 are only connected by the contacting single-sided surfaces. The connection strength is the same as the connection strength without folded edges 103, which cannot improve the connection strength of the two sides 102 of the tote bag 10 at the bag opening.

[0060] In this embodiment, at least one of the two first sidewalls 312 of the forming mold 310 of the bag forming system 30 is provided with a gripping part 3121 adapted to the side 102 of the corresponding tote bag 10. After the substrate 20 surrounds the forming mold 310, the gripping part 3121 of at least one first sidewall 312 grips the corresponding side 202 of the substrate and drives the side 202 of the substrate to move relative to the mold body 311 along the height direction of the mold body 311, so that the two sides 202 of the substrate form a height difference, and the folded edges 103 of the two are staggered in the height direction. The folded edges 103 on the substrate side 102 will be freed from the bending point under the action of their own restoring force. (The creases can be pressed in advance) and opened at a certain angle. Furthermore, at least one first sidewall 312 is linked by the gripping part 3121 to return the corresponding side of the substrate 202 to a position flush with the other side of the substrate 202. During the return process, the upper end of the side of the substrate 202 is inserted from the bend between the other side of the substrate 202 and the folded edge 103, so that the folded edges 103 at both ends of the substrate 20 are interlocked in the height direction of the mold body 311. At this time, the opposite sides of the side of the substrate 202 and the other side of the substrate 202 are overlapped with each other. Under the premise of completing the bag body forming, the connection strength of the side 102 of the tote bag 10 at the bag opening is ensured.

[0061] The tote bag 10 processed by this bag forming system 30 has a bottom surface 101 that connects to the two side surfaces 102, which greatly enhances the connection strength between the bottom surface 101 and the side surfaces 102, compared to the prior art where the bottom ends of the side walls of the bag are glued together to form the bottom of the bag. This improves the support of the tote bag 10. Furthermore, by folding the opening inward to form an integrated folded edge 103, the strength of the opening is improved, reducing the risk of tearing the opening when loading or unloading items.

[0062] Furthermore, the bag forming system 30 of this tote bag 10 allows the pre-formed folded edges 103 of the substrate 20 to be interlocked at both ends of the substrate 20 in the height direction of the mold body 311 during the forming process. This greatly simplifies the bag forming process of the tote bag 10 with folded edges 103, eliminating the need for an additional folding machine to fold the bag opening and saving space occupied by the forming equipment of the tote bag 10.

[0063] The working process of the bag forming system 30 will be explained in more detail below with reference to the substrate 20.

[0064] As shown in Figure 6, before the substrate 20 is transferred to the receiving platform 320, it undergoes pretreatment. The substrate 20 needs to be cut into a predetermined shape. Along its length, the substrate 20 includes a first substrate side, a substrate center 201, and a second substrate side (the first and second substrate sides are only used to distinguish the two substrate sides 202). Indentations are present between the first substrate side, the substrate center 201, and the second substrate side to facilitate deformation by the forming mold 310. The length direction of the substrate 20 is shown by the first arrow 50 in Figure 6, and the width direction is shown by the second arrow 60 in Figure 6.

[0065] Furthermore, the central portion 201 of the substrate is shaped to match the bottom surface 101 of the tote bag 10, and the first and second substrate side portions are respectively shaped to match the two side walls of the tote bag 10. Additionally, each substrate side portion 202 has a substrate side extension 2021 formed on both sides of the substrate 20 in the width direction.

[0066] Furthermore, the free ends of the first substrate side and the second substrate side in the length direction of the substrate 20 are squeezed by the corresponding folding device and then bent inward to form a fold 103.

[0067] Optionally, in one embodiment, after the free end of the substrate side 202 is bent to form a folded edge 103, two cuts 104 are made in the middle of the width direction of the bag opening. The end of the handle 105 of the tote bag 10 is inserted between the folded edge 103 and the substrate side 202 through the cuts 104 to achieve pre-fixation of the handle 105.

[0068] Furthermore, in one embodiment, the middle portion 201 of the substrate is provided with bottom fold protrusions 203 at both ends in the width direction. In subsequent processes, the bottom fold protrusions 203 are bent inward to connect with the side of the first substrate and the side of the second substrate to form a bottom fold 106, so as to connect the bottom surface 101 and the side surface 102 of the tote bag 10, and at the same time improve the sealing of the bag.

[0069] At this point, after the pretreatment of the substrate 20 is completed, as shown in Figures 2 and 5, the substrate 20 is transferred to the receiving platform 320, located directly below the molding die 310. The molding die 310 moves vertically and presses down on the middle 201 of the substrate, causing the substrate 20 to bend around the molding die 310. The shaped structure surrounds the molding die 310.

[0070] As shown in Figures 2 and 3, the forming mold 310 is driven by the mold driving mechanism 330 (e.g., a mold driving motor) and transmitted to the connecting plate 331 by a transmission belt. The connecting plate 331 is detachably connected to the upper end of the forming mold 310. The mold driving mechanism 330 is mounted on the frame 40 of the bag forming equipment. The frame 40 serves as the support structure for the entire forming equipment and is composed of multiple frame beams. The frame 40 has at least three layers of support surfaces in the vertical direction. The top layer supports the connecting mold driving mechanism 330, the middle layer supports the substrate 20, and the bottom layer supports other components. This embodiment does not specifically limit the specific structure of the frame 40.

[0071] The frame 40 is provided with a guide rail extending along the height direction of the forming mold 310. The connecting plate 331 has a guided block that is adapted to and connected to the guide rail. Then, the mold drive motor drives the connecting plate 331 and the forming mold 310 to move along the guide rail through a transmission belt, so as to achieve the purpose of pressing down the substrate 20. Of course, the present invention does not specifically limit the specific structure of the mold drive mechanism 330.

[0072] Furthermore, in order to ensure that the substrate 20 does not shift horizontally when the molding die 310 presses down on the substrate 20, optionally, in one embodiment, as shown in FIG2, a bottom support 340 is provided below the receiving platform 320 and aligned vertically with the lower end of the molding die 310.

[0073] The bottom support 340 can move vertically toward the forming mold 310 to clamp the middle part 201 of the substrate together with the lower end of the forming mold 310. The bottom support 340 can be a tray or pallet commonly used in the art. Of course, the bottom support 340 can not only move vertically, but also horizontally to offset from the forming mold 310, thereby creating clearance space for the tote bag 10 to be removed from the forming mold 310 when it is made. Regarding the structure for driving the movement of the bottom support 340, those skilled in the art can design it according to actual conditions and specific needs. This embodiment does not make specific limitations in this regard.

[0074] Of course, in another embodiment, multiple bottom suction cups can also be provided at the bottom of the molding mold 310. The molding mold 310 can adsorb the substrate 20 through the multiple bottom suction cups. This embodiment does not specifically limit the design of the multiple bottom suction cups.

[0075] When the middle part 201 of the substrate has bottom fold protrusions 203 at both ends in the width direction, the bottom fold protrusions 203 need to be bent toward the molding die 310 to form a bottom fold part 106 opposite to the inner side of the side 202 of the substrate.

[0076] Optionally, in one embodiment, as shown in FIG4, the bag forming system 30 further includes a pair of bottom inserts 350 disposed below the receiving platform 320 and located on both sides of the forming mold 310 in the width direction of the substrate 20, and the spacing between the pair of bottom inserts 350 in the width direction of the substrate 20 is the same as the length of the bottom surface 101 of the tote bag 10.

[0077] Furthermore, as shown in Figures 7 and 8, the substrate 20 is bent around the molding die 310. After the base material 20 is shaped and surrounds the molding die 310, a pair of bottom insert components 350 move upward in the vertical direction, pushing the bottom folded protrusions 203 on both sides of the portion of the base material 20 corresponding to the lower end of the molding die 310 to bend upward relative to the lower end of the molding die 310 to form a bottom folded portion 106. The bottom insert components 350 can be provided in the vertical direction and extend perpendicular to the first side wall 312 of the molding die 310 as a bottom insert plate, and can be driven by a motor or cylinder to move. The present invention does not specifically limit this.

[0078] Furthermore, after bending the bottom fold extension 203 of the middle part 201 of the substrate to form the bottom fold 106, the side 202 of the substrate needs to be bent towards each other on opposite sides in the width direction (i.e., the side extension 2021 of the substrate) to form the connecting surface 1021 of the tote bag 10, so as to surround the molding die 310.

[0079] Optionally, in one embodiment, as shown in FIG4, the bag forming system 30 further includes a side sealing assembly 360, wherein the side sealing assembly 360 includes side inserts 361 disposed below the receiving platform 320 and located on both sides of the forming mold 310 in the length direction of the substrate 20.

[0080] Specifically, two pairs of corresponding side insert members 361 are provided on both sides of the molding die 310 along the length of the substrate 20. The distance between the two pairs of side insert members 361 is the same as or slightly greater than the length of the bottom surface 101 of the tote bag 10. The side insert member 361 includes a side insert plate extending vertically and perpendicular to the first sidewall 312 of the molding die 310. The side insert plate can be driven by a side insert drive member to move along the length of the substrate 20.

[0081] As shown in Figures 9 and 10, the side insert is driven to move along the length of the substrate 20 toward the molding die 310, pushing the outer ends (i.e., the substrate side extensions 2021) of both substrate sides 202 in the width direction to bend inward simultaneously, with the corresponding ends overlapping each other. It should be noted that if the substrate 20 is paper, the substrate side extensions 2021 will be pre-sprayed with adhesive. In order to prevent the two opposite substrate side extensions 2021 from bonding prematurely during bending, compared to the side insert directly causing the substrate sides 202 to surround the molding die 310, the stroke of the side insert is slightly shorter, so that the substrate side extensions 2021 on both sides are not completely bent at ninety degrees, and there is a gap between the substrate side extensions 2021 on both sides.

[0082] At this time, the folded edge 103 of the side extension 2021 of one substrate is located inside the folded edge 103 of the side extension 2021 of the other substrate (see Figure 10). It is necessary to use the action of the first side wall 312 of the molding die 310 to make the folded edge 103 of the side extension 202 of one substrate and the bag opening of the side extension 202 of the other substrate interlock.

[0083] Optionally, in one embodiment, one of the two first sidewalls 312 of the molding die 310 is provided with a sidewall guide assembly 314 extending in the height direction between it and the die body 311, and the other is fixedly disposed on the side 102 of the die body 311.

[0084] In this process, the gripping part 3121 of one first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move downward relative to the mold body 311 until the upper end of the folded edge 103 at the end of the side surface 202 of the substrate is lower than the lower end of the folded edge 103 at the end of the other side surface 202 (see Figures 11 and 12). Furthermore, the first sidewall 312 drives the side surface 202 of the substrate to move upward at an angle until the folded edge 103 at the end of the side surface 202 of the substrate is inserted into the folded edge 103 at the end of the other side surface 202, and the upper ends of the folded edges 103 at the ends of the two side surfaces 202 are flush (see Figures 14 and 15).

[0085] It should be noted that when the gripping part 3121 of the first sidewall 312 grips the corresponding side surface 202 of the substrate and moves the side surface 202 of the substrate, the extension part 2021 of the substrate side is connected to the corresponding side surface 202 of the substrate and will move together with the side surface 202 of the substrate.

[0086] In fact, in this embodiment, the folded edge 103 of one side of the substrate 202 and the bag opening of the other side of the substrate 202 are interlocked. This means that the folded edge 103 of the substrate side extension 2021 on both sides of the substrate 20 in the width direction of the substrate 20 is interlocked with the folded edge 103 on the corresponding substrate side extension 2021 of the other side of the substrate 202.

[0087] In another alternative embodiment, a gripping part 3121 of a first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move upward relative to the mold body 311 until the lower end of the folded edge 103 at the end of the side surface 202 of the substrate is higher than the upper end of the folded edge 103 at the end of the other side surface 202. Furthermore, a first sidewall 312 drives the side surface 202 of the substrate to move downward at an angle until the folded edge 103 at the end of the other side surface 202 is inserted into the folded edge 103 at the end of the side surface 202 of the substrate and the upper ends of the folded edges 103 at the ends of the two side surfaces 202 are flush.

[0088] During the molding process, the gripping part 3121 of a first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move relative to the mold body 311, so that the folded edge 103 of the side surface 202 of the substrate is completely offset from the folded edge 103 of the other side surface 202 in the height direction (see Figure 13). For example, the upper end of the folded edge 103 at the end of the side surface 202 of the substrate is lower than the lower end of the folded edge 103 at the end of the other side surface 202, or the lower end of the folded edge 103 at the end of the side surface 202 of the substrate is higher than the upper end of the folded edge 103 at the end of the other side surface 202. Then, when the gripping part 3121 of the first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to return to its original position relative to the mold body 311, the folded edge 103 of the substrate side surface 202 located on the lower side will be inserted between the substrate side surface 202 located on the higher side and the corresponding folded edge 103 (see Figure 16), and the folded edges 103 at both ends of the substrate 20 can be inserted into each other in the height direction of the mold body 311.

[0089] Therefore, a sidewall guide assembly 314 extending in the height direction is provided between a first sidewall 312 and the mold body 311, and another is fixedly provided on the side 102 of the mold body 311. This makes the action required for the molding mold 310 to realize the interlocking of the folded edges 103 at both ends of the substrate 20 simpler, and the molding mold 310 has fewer parts, reducing the possibility of failure and improving the service life and reliability of the molding mold 310.

[0090] In addition, during the process of the first sidewall 312 driving the side surface 202 of the substrate to return to its original position, it moves at an angle relative to the height direction, which makes it easier for the folded edge 103 of the side surface 202 of the substrate to be inserted into each other.

[0091] It should be noted that when one of the first sidewalls 312 on the molding die 310 moves in conjunction with the corresponding substrate side 202, it may affect the other substrate side 202. This can make the middle part 201 of the substrate fit tightly against the bottom wall of the molding die 310 (for example, by clamping with the bottom support 340, or by suction cups provided at the bottom of the molding die 310), preventing the deformation of one substrate side 202 from being transmitted to the other substrate side 202 and avoiding misalignment of the other substrate side 202. Of course, a gripping part 3121 can also be provided on the first sidewall 312 on the other side to grip the other substrate side 202. Alternatively, an external structure, such as a bag-removing belt, can be used to press the other substrate side 202 against the corresponding first sidewall 312. This invention does not specifically limit this.

[0092] In another embodiment, each of the two first sidewalls 312 of the molding die 310 is provided with a sidewall guide assembly 314 extending in the height direction between it and the die body 311. Specifically, the gripping part 3121 of one first sidewall 312 grips the corresponding side surface 202 of the substrate material and causes the side surface 202 of the substrate material to move downward relative to the die body 311, while the gripping part 3121 of the other first sidewall 312 grips the corresponding side surface 202 of the substrate material and causes the side surface 202 of the substrate material to move upward relative to the die body 311, until the upper end of the folded edge 103 at the end of one side surface 202 is lower than the lower end of the folded edge 103 at the end of the other side surface 202.

[0093] Furthermore, one first sidewall 312 causes one side of the substrate 202 to tilt upward and move downward, while the other first sidewall 312 causes one side of the substrate 202 to tilt downward until the folded edge 103 at the end of the other side of the substrate 202 is inserted into the folded edge 103 at the end of the one side of the substrate 202, and the upper ends of the folded edges 103 at the ends of both sides of the substrate 202 are flush.

[0094] During the molding process, the two first sidewalls 312 respectively drive the corresponding substrate sidewalls 202 to move in opposite directions in the height direction, so that the folded edges 103 on the two substrate sidewalls 202 are completely staggered in the height direction. For example, one first sidewall 312 drives one substrate sidewall 202 to move downward relative to the mold body 311, and the other first sidewall 312 drives the other substrate sidewall 202 to move upward relative to the mold body 311, until the upper end of the folded edge 103 at the end of one substrate sidewall 202 is lower than the lower end of the folded edge 103 at the end of the other substrate sidewall 202. When the two first sidewalls 312 drive the corresponding substrate sidewalls 202 to return to their original positions, the folded edge 103 of the lower substrate sidewall 202 will be inserted between the upper substrate sidewall 202 and the folded edge 103. More specifically, during the process of the folded edges 103 on the two substrate sides 202 returning to their original position after being offset in the height direction, at least the edge portion of the folded edge 103 at the end of the substrate side 202 closer to the molding mold 310 will be inserted into the folded edge at the end of the substrate side 202 away from the molding mold 310, so as to form a uniform and smooth bag opening folded edge 103 around the bag opening of the finished tote bag 10.

[0095] Therefore, a sidewall guide component 314 extending in the height direction is provided between each of the two first sidewalls 312 and the mold body 311. Since the two sides of the substrate 202 will move in opposite directions in the height direction under the linkage of the corresponding first sidewalls 312, compared with the structure of providing a sidewall guide component 314 between a first sidewall 312 and the mold body 311, the stroke of a single first sidewall 312 in the height direction is shorter, the deformation of the substrate 20 on one side is smaller, the probability of torsional deformation of the substrate 20 is lower, the substrate 20 is less likely to be damaged, and the production efficiency and yield rate are improved.

[0096] It should be noted that, in order to improve the success rate of interlocking of the folded edges 103 at both ends of the substrate 20 in the height direction of the mold body 311, the folded edges 103 of the lowered substrate side 202 can be pre-attached to the corresponding substrate side 202. The folded edges 103 will not open due to elastic restoring force, thus making it easier to insert between the upper substrate side 202 and the folded edges 103.

[0097] After the folded edges 103 at both ends of the substrate 20 are interlocked in the height direction of the mold body 311 by the action of the first sidewall 312 on the molding mold 310, it is necessary to overlap the opposite sides of the two sides 102. For example, when the substrate 20 is paper, the outer ends of the substrate side 202 in the width direction are pre-applied with adhesive to bond the overlapping parts of the outer ends of the two substrate side sides 202; or, for example, when the substrate 20 is non-woven fabric, the overlapping parts of the outer ends of the two substrate side sides 202 need to be pressed by an ultrasonic heat press head or a heat sealing component to fix the bag body.

[0098] Optionally, as shown in Figure 4, in this embodiment, taking paper as an example, the side sealing assembly 360 further includes pressing members 362 disposed below the receiving platform 320 and located on both sides of the forming mold 310 in the width direction of the substrate 20. When the folded edges 103 at both ends of the substrate 20 interlock in the height direction of the mold body 311, and the outer ends of the two substrate sides 202 are simultaneously bent inward in the width direction with their corresponding ends overlapping each other, the pressing members 362 move towards the forming mold 310, so that the overlapping portions of the corresponding ends of the two substrate sides 202 overlap together, and the overlapping portions are bonded together with adhesive. Furthermore, the lower sides of the corresponding ends of the two substrate sides 202 are fixedly bonded to the pre-folded bottom bend 106 (see Figure 1).

[0099] It should be noted that before the pressing component 362 moves toward the molding die 310, the side insert plate can also move further toward the molding die 310 along the length direction of the substrate 20, pushing the outer ends of the two substrate sides 202 in the width direction to bend further inward until they approach ninety degrees, which makes it easier for the pressing component 362 to press the overlapping parts of the corresponding ends of the two substrate sides 202.

[0100] To better understand how the molding die 310 causes the folded edges 103 on both sides of the substrate 20 to interlock through the action of the first sidewall 312, the specific structure of the molding die 310 is described below.

[0101] As shown in Figures 17-19, in this embodiment, the molding die 310 includes a die body 311, a pair of first sidewalls 312, and a pair of second sidewalls 313. The pair of first sidewalls 312 are disposed on opposite sides of the die body 311 in a first direction, corresponding to the two sides 102 of the tote bag 10 respectively. The pair of second sidewalls 313 are disposed on opposite sides of the die body 311 in a second direction, respectively disposed between the opposite ends of each side of the pair of first sidewalls 312. When viewed along the height direction of the die body 311, the outline formed by the pair of first sidewalls 312 and the pair of second sidewalls 313 is adapted to the outer shape of the cross-section of the tote bag 10.

[0102] It should be noted that, in this embodiment, the first direction is parallel to the length direction of the substrate 20 forming the tote bag 10, and the second direction is parallel to the width direction of the substrate 20 forming the tote bag 10.

[0103] In this design, at least one first sidewall 312 is provided with a sidewall guide assembly 314 between it and the mold body 311. At least one first sidewall 312 can reciprocate along the sidewall guide assembly 314 relative to the mold body 311 along the height direction of the mold body 311, and is provided with a gripping part 3121 adapted to the side surface 102 of the corresponding tote bag 10. It should be noted that the molding mold 310 may have the sidewall guide assembly 314 provided between either of the two first sidewalls 312 and the mold body 311, or both first sidewalls 312 may have the sidewall guide assembly 314 provided between them.

[0104] Optionally, in one embodiment, the mold body 311 includes a body support 3110, a pair of first sidewalls 312 and a pair of second sidewalls 313 disposed around the body support 3110.

[0105] A pair of second sidewalls 313 are fixed to opposite ends of the main body bracket 3110 in the second direction. The pair of second sidewalls 313 can be connected to the main body bracket 3110 via a connecting cross plate. The upper end of the main body bracket 3110 extends beyond the tops of the first sidewall 312 and the second sidewalls 313 and is detachably connected to the mold drive mechanism 330. Specifically, the upper end of the main body bracket 3110 and the mold drive mechanism 330 can be connected via detachable methods commonly used in the art, such as snap-fit ​​or screw-fit.

[0106] The sidewall guide assembly 314 between the first sidewall 312 and the mold body 311 will be described in detail below.

[0107] The sidewall guide assembly 314 includes a sidewall drive member 3141 and a guide member. The sidewall drive member 3141 is fixed on the mold body 311, located inside the corresponding first sidewall 312, and is connected to the inner wall of the first sidewall 312. The guide member includes a guide member 3142 extending along the height direction of the mold body 311 and disposed on the mold body 311, and a guided member 3123 disposed on the inner wall of the corresponding first sidewall 312. The guided member 3123 is slidably adapted to the guide member 3142.

[0108] Furthermore, in a cross-section taken along the height direction of the mold body 311, the lower end of the guide 3142 is closer to the corresponding first sidewall 312 in the first direction than its upper end. Therefore, the first sidewall 312 is driven by the sidewall drive 3141 and slides obliquely along the guide 3142 relative to the vertical direction. Taking the first sidewall 312 moving downward in the vertical direction as an example, the first sidewall 312 will move obliquely towards the lower side of the mold body 311, thereby better separating the overlapping folded edges 103 on the upper parts of the two substrate sidewalls 202. At the same time, there is a gap between the first sidewall 312 and the pair of second sidewalls 313 to avoid the first sidewall 312 colliding with the edges of the pair of second sidewalls 313 when it moves along the guide 3142.

[0109] Specifically, in one embodiment, the side wall drive member 3141 is a drive cylinder, which is fixed to the inner wall of a corresponding second side wall 313, and the output end of the drive cylinder is connected to the inner wall of a corresponding first side wall 312.

[0110] The guide 3142 is a guide rail that extends along the height direction of the body support 3110 in the middle of the body support 3110 in the second direction, and the guided member 3123 is a slider that is located on the inner wall of the corresponding first side wall 312 in the second direction and is adapted to the guide rail.

[0111] Specifically, as shown in Figure 20, in this embodiment, two driving cylinders are provided between the first sidewall 312 and the main body support 3110. The two driving cylinders are symmetrically arranged on both sides of the main body support 3110. Two pairs of guides 3142 are symmetrically arranged on both sides of the main body support 3110. The first sidewall 312 forms a guide 3123 that is adapted to and connected to it at the corresponding position.

[0112] In this embodiment, the gripping part 3121 provided on the first sidewall 312 is for gripping the corresponding substrate side 202 to maintain a predetermined relative position with the corresponding first sidewall 312. When one first sidewall 312 moves under the action of the sidewall guide component 314, the gripping part 3121 can grip the corresponding substrate side 202 and move together with the first sidewall 312, while the other first sidewall 312 does not move. The gripping part 3121 provided on the other first sidewall 312 can ensure that the corresponding substrate side 202 is not pulled and displaced.

[0113] Optionally, in one embodiment, the gripping part 3121 consists of a plurality of suction cups 3122 evenly distributed on the outer wall of the first side wall 312, and the plurality of suction cups 3122 are all connected to an external air extraction device through pipes. It should be noted that the number of suction cups 3122 can be two, three, four or other numbers, and the present invention does not limit this to a single number.

[0114] Each suction cup 3122 is funnel-shaped, with its opening facing the side of the first sidewall 312 away from the mold body 311, and the outer edge of the suction cup 3122 is flush with the first sidewall 312.

[0115] Furthermore, the suction cup 3122 can extend outward from the outer side of the first sidewall 312 to grasp the corresponding side surface 202 of the substrate. Specifically, the molding mold 310 moves vertically and presses down on the middle part 201 of the substrate. During the downward movement of the middle part 201 of the substrate, the two sides 202 of the substrate 20 in the length direction will bend towards the sidewall of the molding mold 310 under the action of inertia or the action of the receiving platform 320. At this time, the suction cup 3122 on the first sidewall 312 extends outward from the outer side of the first sidewall 312 and adheres to the corresponding side surface 202 of the substrate. Then, during the return process, it drives the side surface 202 of the substrate to approach and adhere to the corresponding first sidewall 312.

[0116] In another alternative embodiment, the gripping part 3121 is a claw disposed at the upper edge of the first sidewall 312. The claw can move along the length direction of the substrate 20 to clamp the substrate side 202 corresponding to the first sidewall 312, so that the substrate side 202 is attached to the corresponding first sidewall 312.

[0117] Alternatively, a pushing component that can move toward the molding mold 310 can be provided on the side of the molding mold 310 along the length direction of the substrate 20. After the bottom insertion component 350 and the side insertion component 361 have successively completed their action on the substrate 20, the pusher plate pushes the component toward the corresponding substrate side 202, so that the substrate side 202 fits against the corresponding first side wall 312. The pushing component can be provided with a plate-like structure parallel to the first side wall 312, and this embodiment does not limit it to this only.

[0118] Furthermore, as shown in Figures 17 and 18, in order to facilitate the interlocking of the folded edge 103 of one side of the substrate 202 with the folded edge 103 of the other side of the substrate 202, optionally, in one embodiment, an air suction hole 3131 is formed on the second sidewall 313, which penetrates the second sidewall 313. The air suction hole 3131 is connected to an external air extraction device through a pipe provided in the mold body 311.

[0119] When viewed along the second direction, the air intake 3131 is located on the second side wall 313 in the area of ​​the folded edge 103 of the handbag 10 that is inserted, ensuring that the air intake 3131 can act on the folded edge 103, thereby adsorbing the inward folded edge 103 and forming an opening between it and the corresponding substrate side 202, so that the lower side 102 and the folded edge 103 can be inserted.

[0120] In another alternative embodiment, an air blowing hole is formed on the second sidewall 313, and the air blowing hole is connected to an external air blowing device through a pipe provided in the mold body 311.

[0121] Furthermore, when viewed along the second direction, the air blowing hole is located on the second side wall 313 in the area below the fold 103 of the handbag 10 that is inserted. The air blowing hole blows air toward the substrate side 202. Under the obstruction of the substrate side 202, the airflow is dispersed in the vertical direction, and some of the gas will enter between the substrate side 202 and the fold 103, thereby opening the fold 103, which also facilitates the insertion of the substrate side 202 and the fold 103 on the lower side.

[0122] Optionally, in one embodiment, as shown in Figures 18 and 19, a first sidewall 312 of the molding die 310 has a plate-like structure, with a sidewall guide assembly 314 disposed between it and the die body 311. The other sidewall 312 is formed by a pair of second sidewalls 313 along edges in a second direction. When one sidewall 312 is linked by the sidewall guide assembly 314 and moves along with the corresponding substrate sidewall 202, the other sidewall substrate sidewall 202 is pressed against the edge of the corresponding second sidewall 313 by the bag-removing component. The bag-removing component is configured as a bag-removing belt integrated into the side insert plate. This structure allows the sidewall guide assembly 314 disposed inside the molding die 310 to be in an open state, facilitating inspection and maintenance.

[0123] Of course, the specific structure of the molding die 310 is not limited to the specific embodiments of the present invention.

[0124] Furthermore, in the face of diverse size and specification demands in the market, traditional molds, due to their large size, considerable weight, and fixed structure, require frequent mold changes when switching to produce different sizes of stand-up pouches. This not only increases production costs but also severely impacts production efficiency and flexibility due to the complexity and time-consuming nature of mold replacement.

[0125] Therefore, in one embodiment, the bag forming system 30 further includes a mold replacement assembly (not shown in the figure). The mold replacement assembly includes multiple mounting seats for mounting multiple forming molds 310, and a guide component located between the multiple mounting seats and the mold drive mechanism 330. The guide component is provided with mold disassembly / assembly parts that can move along the guide component. The number of mounting seats can be two, three, four, or other numbers, and this embodiment does not specifically limit this number.

[0126] The mold assembly can move along the guide component between the mold drive mechanism 330 and any mounting base, and can disassemble the molding mold 310 from the end of the mold drive mechanism 330 and place it on an empty mounting base, or remove the molding mold 310 from the mounting base and install it to the end of the mold drive mechanism 330.

[0127] This bag forming system 30 can replace multiple forming molds 310 set on the mounting base and the mold drive mechanism 330 using the mold replacement component of the mold replacement assembly. Compared with the prior art, which involves installing or removing stripper plates on the forming molds 310 or manually disassembling the forming molds 310, this system reduces the difficulty of mold replacement, saves time and effort, and thus has the advantage of high mold replacement efficiency.

[0128] Optionally, in one embodiment, the guiding component includes a first guide extending along a first direction between the mold driving mechanism 330 and a plurality of mounting seats, and a second guide extending along a second direction through an opening in each bearing seat; wherein the first direction and the second direction are orthogonal to each other, and the first guide is disposed on the second guide and is movable relative to the second guide along the second direction, and the mold assembly / disassembly component is movably disposed on the first guide along the first direction. It should be noted that in this embodiment, the first direction is the width direction of the substrate 20, and the second direction is the length direction of the substrate 20. Of course, the first direction can also be the length direction of the substrate 20, and the second direction can be the width direction of the substrate 20; this embodiment does not specifically limit this.

[0129] Furthermore, the guiding component also includes a first driving member and a second driving member, wherein the first driving member drives the mold assembly / disassembly component to move along a first direction, and the second driving member drives the first guiding member to move along a second direction. It should be noted that the first and second guiding members can be commonly used slides and slide rails in the art.

[0130] During mold changing, the mold assembly / disassembly component moves along the guide member between the mold drive mechanism 330 and multiple support seats. For example, during mold unloading, the first drive member drives the mold assembly / disassembly component to move the mold 310 removed from the mold drive mechanism 330 along the first guide member to one side of multiple mounting seats. Further, the second drive member drives the first guide member to move along the second guide member, so that the mold assembly / disassembly component on the first guide member corresponds to the support seat in the unloaded state, and the unloaded support seat loads the removed mold 310. During mold assembly, the second drive member drives the first guide member along the guide member. The second guide moves, causing the mold disassembly and assembly component on the first guide to correspond with the support seat on which the mold to be replaced 310 is loaded. The mold disassembly and assembly component picks up the mold to be replaced 310. Then, the second drive component drives the first guide to move along the second guide, causing one end of the first guide to correspond with the mold drive mechanism 330. The first drive component drives the mold disassembly and assembly component to transport the mold to be replaced 310 along the first guide to the mold connection position of the mold drive mechanism 330. The mold to be replaced 310 is then connected by the connecting plate 331 of the mold drive mechanism 330, completing the mold replacement.

[0131] Of course, those skilled in the art can design the specific structure of the mold replacement component according to the actual situation and specific needs, and this embodiment does not impose specific limitations on it.

[0132] Using the bag forming system 30 described above, embodiments of the present invention also disclose a method for forming a tote bag, as shown in FIG20. This bag forming method includes the following steps:

[0133] S1: Die-cut raw material to form the base material of the tote bag 10. The base material includes a first base material side, a base material middle part 201, and a second base material side in sequence along its length. The base material middle part 201 is adapted to the shape of the bottom surface 101 of the tote bag 10, and the first base material side and the second base material side are adapted to the shapes of the two side walls of the tote bag 10, respectively. The base material middle part 201 is provided with bottom fold protrusions 203 at both ends in the width direction.

[0134] The raw materials can be paper, paper-like materials, or non-woven fabrics, etc.

[0135] S2: Bend the free ends of the first substrate side and the second substrate side in the length direction inward to form a folded edge 103;

[0136] S3: The substrate with the folded edge 103 is transferred to the receiving platform 320, located directly below the forming mold 310. The forming mold 310 moves vertically and presses down on the middle 201 of the substrate, causing the substrate to bend around the forming mold 310. The shaped structure surrounds the molding die 310;

[0137] S4: The gripping part 3121 of at least one first sidewall 312 of the molding die 310 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move back and forth relative to the mold body 311 of the molding die 310 along the height direction of the mold body 311, so that the folded edges 103 at both ends of the substrate are interlocked with each other in the height direction of the mold body 311.

[0138] Further, step S4 includes:

[0139] A gripping part 3121 of a first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move downward relative to the mold body 311 until the upper end of the folded edge 103 at the end of the side surface 202 of the substrate is lower than the lower end of the folded edge 103 at the end of the other side surface 202. Then, a first sidewall 312 drives the side surface 202 of the substrate to move upward at an angle until the folded edge 103 at the end of the side surface 202 of the substrate is inserted into the folded edge 103 at the end of the other side surface 202, and the upper ends of the folded edges 103 at the ends of the two sides surface 202 are flush.

[0140] Alternatively, the gripping part 3121 of a first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move upward relative to the mold body 311 until the lower end of the folded edge 103 at the end of the side surface 202 of the substrate is higher than the upper end of the folded edge 103 at the end of the other side surface 202. Then, the first sidewall 312 drives the side surface 202 of the substrate to move downward at an angle until the folded edge 103 at the end of the other side surface 202 is inserted into the folded edge 103 at the end of the side surface 202 of the substrate and the upper ends of the folded edges 103 at the ends of the two sides surface 202 are flush.

[0141] Alternatively, the gripping part 3121 of one first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move downward relative to the mold body 311, and the gripping part 3121 of the other first sidewall 312 grips the corresponding side surface 202 of the substrate and drives the side surface 202 of the substrate to move upward relative to the mold body 311, until the upper end of the folded edge 103 at the end of one side surface 202 is lower than the lower end of the folded edge 103 at the end of the other side surface 202.

[0142] Furthermore, one first sidewall 312 causes one side of the substrate 202 to tilt upward and move downward, while the other first sidewall 312 causes one side of the substrate 202 to tilt downward until the folded edge 103 at the end of the other side of the substrate 202 is inserted into the folded edge 103 at the end of the one side of the substrate 202, and the upper ends of the folded edges 103 at the ends of both sides of the substrate 202 are flush.

[0143] This method of forming the tote bag 10 involves bending the free ends of the first and second substrate sides inward along their length before forming, creating folded edges 103. Further, after the substrate is transferred to the receiving platform 320 and pressed by the forming mold 310, the corresponding substrate side 202 is gripped by at least one gripping part 3121 of the first sidewall 312 of the forming mold 310, and the substrate side 202 is moved back and forth relative to the mold body 311 of the forming mold 310 along the height direction of the mold body 311, so that the folded edges 103 at both ends of the substrate interlock with each other along the height direction of the mold body 311. This completes the tote bag 10 forming process.

[0144] The tote bag 10 manufactured by this bag forming method has a bottom surface 101 that is connected to the two side surfaces 102, which greatly enhances the connection strength between the bottom surface 101 and the side surfaces 102, thus improving the support of the tote bag 10. In addition, the bag opening is formed with an integrated folded edge 103, which improves the strength of the bag opening and reduces the risk of tearing the bag opening when loading and unloading items.

[0145] Furthermore, compared to the existing technology where the tote bag 10 is processed again using other equipment after the bag body is formed, and then the edge of the tote bag 10 is folded, this bag body forming method forms the folded edge 103 before the base material 20 is pressed down by the forming mold 310 when producing the tote bag 10 with the folded edge 103. This eliminates the need for secondary processing of the produced bag body and greatly improves the production efficiency of the tote bag 10.

[0146] Optionally, in one embodiment, before step S3, the following step is further included:

[0147] S3-1: Select the mold model according to the size of the tote bag 10 to be formed, and connect the selected mold 310 to the mold drive mechanism 330.

[0148] It should be noted that different models of forming molds 310 differ in at least one of their length, width, and thickness dimensions. Of course, the shape of the forming mold 310 is related to the specific bag type to be produced, and those skilled in the art can design it according to actual conditions and specific needs. This embodiment does not impose any specific limitations on this.

[0149] However, the connection structure between each molding die 310 and the mold drive mechanism 330 is the same, ensuring that each molding die 310 can be connected to the mold drive mechanism 330.

[0150] During use, the user matches the desired bag type with the model of the forming mold 310 on the mold drive mechanism 330.

[0151] If a match is found, proceed with subsequent production.

[0152] If not matched, the desired bag type is further matched with the model of the forming mold 310 on multiple mounting seats. The forming mold 310 that matches the desired bag type and is mounted on one of the mounting seats is identified as the mold to be replaced. The forming mold 310 to be replaced on the mounting seat and the existing forming mold 310 on the mold drive mechanism 330 are replaced by the mold disassembly and assembly parts of the mold replacement component.

[0153] Optionally, in one embodiment, the following steps are included before step S4:

[0154] The bottom folded portion 106 of the tote bag 10 is formed by bending the bottom folded protrusions 203 at both ends of the middle portion 201 of the substrate using the bottom insert component 350.

[0155] Optionally, in one embodiment, after step S4, the following step is further included:

[0156] The side sealing assembly 360 pushes the outer ends (i.e., the side extensions 2021) of the first and second substrates in the width direction to bend inward simultaneously, with the corresponding ends overlapping and joining together. It should be noted that after the outer ends of the first and second substrates in the width direction are simultaneously bent inward and their corresponding ends overlap, they can be bonded together by pre-sprayed adhesive or heat-sealed by a heat-sealing component, thereby connecting the first and second substrates. The outer ends of the first and second substrates in the width direction can be sprayed with adhesive before the substrate 20 is transferred to the receiving platform 320.

[0157] It should be noted that, in addition to the specific embodiments described above, 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 the 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 invention, many specific details are included in the above description, and the invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the 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.

[0158] 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.

[0159] 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.

[0160] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0161] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; 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.

[0162] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A bag body forming system of a handbag, the handbag comprising a bottom surface, two side surfaces located on both sides of the bottom surface, and opposite sides of the two side surfaces being overlapped with each other; characterized in that, The molding system includes a molding die that can move vertically and a receiving platform located below the molding die; and, The molding die includes a die body and two first sidewalls corresponding to two sides of the tote bag; the lower end of the die body is adapted to the shape of the bottom surface of the tote bag, and at least one of the two first sidewalls of the molding die is provided with a gripping part adapted to the corresponding side of the tote bag, and can reciprocate relative to the die body along the height direction of the die body; wherein, The base material of the handbag is pre-folded with a hem at both ends in the length direction, transferred to the receiving platform and located right below the forming die. The forming die presses the base material, which is bent around the forming die to form a bag body with a bottom and two side walls The mold has a shaped structure that surrounds the molding die; at least one of the gripping portions of the first sidewall of the molding die grips the corresponding side of the substrate and drives the side of the substrate to reciprocate relative to the mold body along the height direction of the mold body, so that the folded edges at both ends of the substrate interlock with each other in the height direction of the mold body.

2. The bag body forming system of claim 1, wherein in, One of the two first sidewalls of the molding die is provided with a sidewall guide assembly extending along the height direction between itself and the die body; the other is fixedly disposed on the side of the die body. The gripping part of one of the first sidewalls grips the corresponding side of the substrate and moves that side of the substrate downward relative to the mold body until the upper end of the folded edge of the side of the substrate is lower than the lower end of the folded edge of the other side of the substrate. Then, the first sidewall moves the side of the substrate upward at an angle until the folded edge of the side of the substrate is inserted into the folded edge of the other side of the substrate, and the upper ends of the folded edges of both sides of the substrate are flush. Alternatively, The gripping part of the first sidewall grips the corresponding side of the substrate and moves the side of the substrate upward relative to the mold body until the lower end of the folded edge of the side of the substrate is higher than the upper end of the folded edge of the side of the substrate on the other side. Then, the first sidewall moves the side of the substrate downward at an angle until the folded edge of the side of the substrate on the other side is inserted into the folded edge of the side of the substrate on the first side, and the upper ends of the folded edges of the two sides of the substrate are flush.

3. The handle bag body forming system according to claim 1, wherein in, Each of the two first sidewalls of the molding die is provided with a sidewall guide assembly extending along the height direction between itself and the die body; wherein, One of the gripping parts of the first sidewall grips the corresponding side of the substrate and moves that side of the substrate downward relative to the mold body, while the other gripping part of the first sidewall grips the corresponding side of the substrate and moves that side of the substrate upward relative to the mold body, until the upper end of the folded edge of the side of the substrate is lower than the lower end of the folded edge of the side of the substrate; further One first sidewall causes the side of the substrate on one side to tilt upward and the other first sidewall causes the side of the substrate on one side to tilt downward until the folded edge at the end of the side of the substrate on the other side is inserted into the folded edge at the end of the side of the substrate on one side, and the upper ends of the folded edges at the ends of the side of the substrate on both sides are flush.

4. The handle bag body forming system according to claim 1, wherein in, The bag forming system also includes a mold driving mechanism mounted on the frame. The end of the mold driving mechanism is detachably connected to the upper end of the mold body. The mold driving mechanism can move the forming mold vertically in conjunction with the mold to press down on the substrate on the receiving platform.

5. The bag body forming system of claim 4, wherein in, The bag forming system further includes a mold replacement assembly, which includes multiple mounting seats for mounting multiple forming molds, and a guide component located between the multiple mounting seats and the mold driving mechanism. The guide component is provided with mold disassembly and assembly parts that can move along the guide component. The mold assembly / disassembly component can move along the guide member between the mold drive mechanism and any of the mounting seats, detaching the molding mold from the end of the mold drive mechanism and placing it in an empty mounting seat, or extracting the molding mold from the mounting seat and installing it to the end of the mold drive mechanism.

6. The handle bag body forming system according to claim 1, wherein The bottom surface of the tote bag has bottom bends at both ends that connect to the corresponding side surfaces; wherein... The bag forming system further includes a pair of bottom insert components disposed below the receiving platform and located on both sides of the forming mold in the width direction of the substrate, wherein the spacing between the pair of bottom insert components in the width direction of the substrate is the same as the bottom length of the tote bag; and, the substrate is bent around the shaped mold to form After the shaped structure surrounds the molding die, the pair of bottom inserts move upward in the vertical direction, pushing the portions of the substrate corresponding to the lower end of the molding die to bend upward relative to the lower end of the molding die on both sides in the width direction to form the bottom bent portion.

7. The handle bag body forming system according to claim 1, wherein The bag forming system also includes a side sealing assembly, wherein... The side sealing assembly includes side inserts disposed below the receiving platform and located on both sides of the molding die along the length of the substrate; wherein... the substrate is bent around the shaped mold to form After the shape structure surrounds the molding mold, the side insert component moves toward the molding mold along the length direction of the substrate, pushing the outer ends of the two sides of the substrate in the width direction to bend inward at the same time and the corresponding ends overlap each other.

8. The handle bag body forming system according to claim 7, wherein The side sealing assembly further includes clamping components disposed below the receiving platform and located on both sides of the molding die in the width direction of the substrate; wherein, When the folded edges at both ends of the substrate are interlocked in the height direction of the mold body, and the outer ends of the two sides of the substrate are simultaneously bent inward in the width direction and the corresponding ends overlap each other, the pressing component moves toward the molding mold so that the overlapping portions of the corresponding ends of the two sides of the substrate overlap together.

9. The handle bag body forming system according to claim 1, wherein in, The bag forming system further includes a bottom support component disposed below the receiving platform and aligned vertically with the lower end of the forming mold; wherein, The bottom support can move vertically toward the molding die to clamp the substrate together with the lower end of the molding die.

10. A method for forming the body of a tote bag, utilizing the bag forming system as described in any one of claims 1 to 9; characterized in that, Includes the following steps: S1: Die-cut raw material to form a base material for a tote bag, wherein the base material includes a first base material side, a base material middle, and a second base material side in sequence along its length direction, wherein the base material middle is adapted to the bottom shape of the tote bag, and the first base material side and the second base material side are adapted to the shapes of the two side walls of the tote bag respectively, and the base material middle is provided with bottom fold protrusions at both ends in the width direction of the base material. S2: Bend the free ends of the first substrate side and the second substrate side inward along the length direction to form a folded edge; S3: The substrate with the folded edge is transferred to the receiving platform, located directly below the forming mold. The forming mold moves vertically and presses down on the middle of the substrate with its lower end, causing the substrate to bend around the forming mold. The shaped structure surrounds the molding die; S4: The gripping part of at least one first sidewall of the molding die grips the corresponding side of the substrate and drives the side of the substrate to move back and forth relative to the mold body of the molding die along the height direction of the mold body, so that the folded edges at both ends of the substrate are interlocked with each other in the height direction of the mold body.

11. The bag forming method according to claim 10, wherein Step S4 includes: The gripping part of one of the first sidewalls grips the corresponding side of the substrate and moves that side of the substrate downward relative to the mold body until the upper end of the folded edge of the side of the substrate is lower than the lower end of the folded edge of the other side of the substrate. Then, the first sidewall moves the side of the substrate upward at an angle until the folded edge of the side of the substrate is inserted into the folded edge of the other side of the substrate, and the upper ends of the folded edges of both sides of the substrate are flush. Alternatively, The gripping part of one of the first sidewalls grips the corresponding side of the substrate and moves that side of the substrate upward relative to the mold body until the lower end of the folded edge of the side of the substrate is higher than the upper end of the folded edge of the other side of the substrate. Then, the first sidewall moves the side of the substrate downward at an angle until the folded edge of the other side of the substrate is inserted into the folded edge of the side of the substrate, and the upper ends of the folded edges of both sides of the substrate are flush. Alternatively, One of the gripping parts of the first sidewall grips the corresponding side of the substrate and moves that side of the substrate downward relative to the mold body, while the other gripping part of the first sidewall grips the corresponding side of the substrate and moves that side of the substrate upward relative to the mold body, until the upper end of the folded edge of the side of the substrate is lower than the lower end of the folded edge of the side of the substrate; further One first sidewall causes the side of the substrate on one side to tilt upward and the other first sidewall causes the side of the substrate on one side to tilt downward until the folded edge at the end of the side of the substrate on the other side is inserted into the folded edge at the end of the side of the substrate on one side, and the upper ends of the folded edges at the ends of the side of the substrate on both sides are flush.

12. The bag forming method according to claim 10, wherein Before step S3, the following steps are also included: S3-1: Select the mold model according to the bag body size of the tote bag to be formed, and connect the selected mold model to the mold drive mechanism.

13. The bag forming method according to claim 10, wherein Before step S4, the following steps are also included: The bottom fold protrusions at both ends of the middle part of the substrate are bent using the bottom insert component to form the bottom fold of the tote bag.

14. The bag forming method according to claim 10, wherein Following step S4, the following steps are also included: The side sealing assembly is used to push the outer ends of the first substrate side and the second substrate side in the width direction to bend inward simultaneously, and the corresponding ends overlap and join together.

15. A bag body forming mold for a handbag according to any one of claims 1 to 9, wherein in, The molding die includes a die body, a pair of first sidewalls, and a pair of second sidewalls. The pair of first sidewalls are located on opposite sides of the die body in a first direction, corresponding to two sides of the tote bag. The pair of second sidewalls are located on opposite sides of the die body in a second direction, respectively positioned between opposite ends of each of the pair of first sidewalls. When viewed along the height of the die body, the outline formed by the pair of first and second sidewalls matches the cross-sectional shape of the tote bag. At least one first sidewall is provided with a sidewall guide assembly between it and the mold body. The at least one first sidewall is movable reciprocally along the sidewall guide assembly relative to the mold body in the height direction of the mold body, and is provided with a gripping portion adapted to the side of the corresponding tote bag. The first direction is parallel to the length direction of the substrate forming the tote bag, and the second direction is parallel to the width direction of the substrate forming the tote bag.

16. The bag body forming mold for a handbag according to claim 15, wherein in, The sidewall guiding assembly includes a sidewall driving component and a guide component. The sidewall driving component is fixed to the mold body, located inside the corresponding first sidewall, and is pulsatorically connected to the inner wall of the first sidewall. The guide component includes a guide component extending along the height direction of the mold body and disposed on the mold body, and a guided component disposed on the inner wall of the corresponding first sidewall. The guided component is slidably adapted to and connected to the guide component. In a cross-section taken along the height direction of the mold body, the lower end of the guide is closer to the corresponding first sidewall in the first direction than the upper end.

17. The bag body forming mold for a handbag according to claim 16, wherein The mold body includes a body support, and the pair of first sidewalls and the pair of second sidewalls are arranged around the body support; wherein... The pair of second sidewalls are fixed to opposite ends of the main body bracket in the second direction, and the upper end of the main body bracket extends beyond the tops of the first and second sidewalls and is detachably connected to the mold drive mechanism; and, The side wall drive component is a drive cylinder, which is fixed to the inner wall of a corresponding second side wall, and the output end of the drive cylinder is connected to the inner wall of a corresponding first side wall. The guide is a guide rail located in the middle of the body support in the second direction and extending along the height direction of the body support. The guided component is a slider located on the inner wall of the corresponding first side wall in the second direction and adapted to the guide rail.

18. The bag body forming mold of the tote bag as described in claim 15, characterized in that, The gripping part consists of multiple suction cups evenly distributed on the outer wall of the first sidewall, and each suction cup is connected to an external air extraction device via a pipe; wherein... The plurality of suction cups are all funnel-shaped, with their openings facing the side of the first sidewall away from the mold body, and the outer edges of the suction cups are flush with the first sidewall; and... The suction cup can extend outward from the outside of the first sidewall to grasp the corresponding side of the substrate.

19. The bag body forming mold for a handbag according to claim 15, wherein in, An air suction hole is formed through the second sidewall, and the air suction hole is connected to an external air extraction device through a pipe disposed within the mold body; and, when viewed along the second direction, the air suction hole is located on the second sidewall within the area of ​​the folded edge of the tote bag on the side where it is inserted; or... An air blowing hole is formed on the second sidewall, and the air blowing hole is connected to an external air blowing device through a pipe provided in the mold body; and, when viewed along the second direction, the air blowing hole is located in the area below the folded edge of the handbag on the side where it is inserted in the folded edge of the handbag on the second sidewall.

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