Handbag forming mold and forming mold assembly

Abstract

This case discloses a forming mold and forming mold assembly for a tote bag. The forming mold includes a mold body, and two first side walls, two second side walls, a bottom wall, and two bag body limiting components disposed on the mold body. The two first side walls are respectively adapted to the two front sides of the tote bag, the two second side walls are respectively adapted to the two sides of the tote bag, the bottom wall is adapted to the bottom surface of the tote bag, and the two bag body limiting components are respectively adapted to the two first side walls. This allows for the insertion of the bag opening fold. When applied in a tote bag forming equipment, it enables the simultaneous forming of the bag body and the bag opening fold, thereby improving both the production efficiency and yield of the tote bag.

Description

Technical Field

[0001] This case relates to the field of manufacturing technology of tote bags, and in particular to a tote bag forming mold and forming mold assembly. Prior Technology

[0002] As a portable storage container, the tote bag has become an indispensable part of our daily lives. It's a bag designed with handles or shoulder straps for easy carrying by hand or over the shoulder, typically made of various materials such as fabric, leather, plastic, and paper. For tote bags made of various materials, structural stability and aesthetics are crucial factors in their design and manufacturing process. These factors not only affect the user experience but also directly impact the bag's practicality and durability. Therefore, more and more tote bags feature inward-folding folds at the opening. These folds not only enhance the bag's structural stability but also improve its overall appearance. Furthermore, the folded opening provides additional protection, reducing friction and discomfort to the hands. Especially when the tote bag is loaded with heavy items, the fold distributes the weight, reducing pressure on the skin and muscles of the hands, making the user more comfortable.

[0003] In existing technologies, the production of tote bags with folded edges typically involves steps such as sheet cutting, forming, folding and fixing the edges. This is especially problematic for materials that are not easily deformed, such as paper bags. Using conventional multi-layer overlapping methods to fix the folded edges not only results in poor flatness at the folded edge, affecting aesthetics, but also significantly weakens the structural reinforcement provided by the folded edges. To address this, existing technologies for producing tote bags from non-deformable materials involve folding the edges after the bag body is formed, using appropriate equipment. This process includes several steps such as outward folding, gluing, and inward folding. This not only involves numerous steps, impacting production efficiency, but also increases the probability of tearing and damage due to repeated folding, leading to a lower yield rate.

[0004] Therefore, the existing technology for producing tote bags with folded openings suffers from low efficiency and low yield. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned deficiencies in the existing technology for producing tote bags with folded openings, and to provide a molding die that can be used to produce tote bags with folded openings.

[0006] To more clearly illustrate the technical solution provided in this case, the structure of the tote bag is first explained as follows.

[0007] The tote bag includes a bottom surface, two front surfaces facing each other in the width direction of the bottom surface, and two side surfaces facing each other in the length direction of the bottom surface, with the opposite sides of the two side surfaces overlapping each other.

[0008] In order to improve the production efficiency and yield of the above-mentioned tote bags, in a first aspect, this invention provides a tote bag forming mold that can be used to provide shape support for the bag body during the process of forming sheet material into a tote bag. When applied in a tote bag forming equipment, it can realize the simultaneous forming of the bag body and the bag opening fold, thereby improving the production efficiency and yield of the above-mentioned tote bags.

[0009] Specifically, this molding die includes a die body, and two first sidewalls, two second sidewalls, a bottom wall, and two bag-body limiting components disposed on the die body; wherein, the two first sidewalls are respectively adapted to the two front faces of the tote bag, the two second sidewalls are respectively adapted to the two sides of the tote bag, the bottom wall is adapted to the bottom surface of the tote bag, and the two bag-body limiting components are respectively adapted to the two first sidewalls. At least one of the two first sidewalls is reciprocally connected to the corresponding side of the die body along the height direction of the die body, and each bag-body limiting component and the corresponding first sidewall together limit the front face of the corresponding tote bag.

[0010] Using this type of molding die, during the bag body forming process, before the sheet material is formed, the bag opening folds can be pre-folded inward at both ends along the length direction of the sheet material to create folded edges. When the sheet material is conveyed to the location of the molding die and pressed by the molding die so that the pre-folded edges along the length direction of the sheet material approach the second sidewall, at least one of the two first sidewalls and the front of an adjacent bag reciprocate together relative to the die body. For example, when the molding die presses the pre-folded edges along the length direction of the sheet material towards the second sidewall, the two fronts of the bag are respectively fixed to the corresponding first sidewalls by two bag body limiting components. One of the first sidewalls moves downward along the height direction of the die body, and the other... One side wall remains stationary relative to the mold body; or one of the first side walls moves upward along the height direction of the mold body while the other first side wall remains stationary relative to the mold body; or one of the first side walls moves upward along the height direction of the mold body while the other first side wall moves downward along the height direction of the mold body. Using any of these operations, the two front faces of the tote bag can be misaligned along the height direction of the mold body, thereby causing the two side sections adjacent to the two front faces to be misaligned. At this time, the connecting part of the bag opening fold is also misaligned vertically. When the two first side walls are reset, the misaligned bag opening folds can interlock. Then, by using corresponding operations such as pressing, the bag body and bag opening fold can be formed simultaneously. Therefore, when using the molding die for tote bags provided in this case to make tote bags, the entire tote bag can be made after the molding process is completed. There is no need to set up a separate bag opening folding device to perform other operations on the formed bag body. This not only simplifies the tote bag making process and improves the tote bag making efficiency, but also avoids the probability of the tote bag body being pulled and damaged by other operations after molding.

[0011] Furthermore, since the molding die provided in this case utilizes the relative movement of the two first side walls when forming the bag body, the folded edge of the bag opening of the tote bag can be connected by an interlocking method. This not only avoids the poor flatness of the folded edge of the bag opening affecting the aesthetics, but also makes the interlocking method more conducive to strengthening the bag body structure of the bag opening.

[0012] Therefore, by using the molding die provided in this case, it is possible to produce more aesthetically pleasing and structurally stable tote bags with high efficiency and high yield.

[0013] Furthermore, in order to improve the success rate of the bag opening folding and insertion, the molding die provided in this case also includes two folding opening components respectively set at corresponding positions on the two second side walls. When the bag opening folding formed by the two ends of the sheet material in the length direction is pressed close to the second side wall, the folding opening component can open the bag opening folding on the side of the two sides of the tote bag that is further away from the second side wall.

[0014] Using this structure, when the sheet material of the tote bag is pre-folded, even if the opening angle of the fold is small, or if the fold is stuck to the bag body due to static electricity or other factors, when the sheet material is pressed close to the second side wall, the fold opening component can accurately open the fold of the inserted bag opening fold. At least one of the two first side walls drives at least one front of the tote bag and moves at least one of the two sides of the tote bag back and forth relative to the mold body, so that the bag opening fold of the other side of the tote bag can be inserted into the bag opening fold of one side, thereby realizing the smooth insertion of the two bag opening folds. This can greatly improve the success rate of bag opening fold insertion and further improve the yield of tote bag production.

[0015] Secondly, this application also provides a molding die assembly for a tote bag, the molding die assembly including a receiving platform, the receiving platform forming a molding area, and a molding die as described above being disposed above the receiving platform at a position corresponding to the molding area; the molding die is movably disposed above the molding area in a vertical direction, and when the sheet material is conveyed to the molding area, the molding die moves from top to bottom so that the two front sides of the tote bag respectively fit against the two first side walls of the molding die.

[0016] Because the molding die assembly adopts the above-mentioned structure, it can simultaneously form the bag body and the folded edge of the bag opening during the molding process of the tote bag. This not only makes the function of the molding die assembly more diversified, but also greatly improves the production efficiency of the tote bag. Simple Explanation of the Diagram

[0017] Figure 1 is a schematic diagram showing the three-dimensional structure of the tote bag provided in the embodiment of this case. Figure 2 is a schematic diagram showing the three-dimensional structure of the molding die for the tote bag provided in the embodiment of this case in its initial state. Figure 3 is a schematic diagram showing the three-dimensional structure of the molding die for the tote bag provided in this embodiment in the side-insertion state. Figure 4 is a schematic diagram showing the three-dimensional structure of the sheet material of the tote bag provided in this embodiment. Figure 5 is a schematic diagram showing the three-dimensional structure of the sheet material and the molding die of the tote bag provided in this embodiment. Figure 6 is a schematic diagram showing the three-dimensional structure of the sheet material of the tote bag provided in this embodiment after it is inserted into the forming mold. Figure 7 is a schematic diagram showing the three-dimensional structure of the tote bag sheet provided in this embodiment after it is inserted into the forming mold. Figure 8 is a schematic diagram showing the three-dimensional structure of the sheet material of the tote bag provided in this embodiment after being inserted by the side insertion assembly. Figure 9 is a schematic diagram showing the three-dimensional structure of the sheet material of the tote bag provided in this embodiment after being inserted by the side insertion component and the forming mold. Figure 10 is a schematic diagram showing the three-dimensional structure of the tote bag during the insertion and folding process provided in the embodiment of this case. Figure 11 is a schematic diagram showing a partial structure of Figure 10. Figure 12 is a schematic diagram illustrating the principle that the folded edge of the bag opening of the handbag provided in this embodiment is opened by the air blowing component. Figure 13 is a schematic diagram showing the connection structure of the folded edge of the bag opening of the handbag provided in the embodiment of this case. Figure 14 is a schematic diagram showing the three-dimensional structure of the molding die for the tote bag provided in this embodiment, with one first sidewall removed. Figure 15 is a schematic diagram showing the structure of the guide member in the molding die of the tote bag provided in this embodiment. Figure 16 is a schematic diagram showing the three-dimensional structure of the molding die assembly for the tote bag provided in this embodiment. Figure 17 is a schematic diagram showing a partial structure of the molding die assembly for the tote bag provided in this embodiment. Implementation

[0018] The bag opening is one of the most easily worn parts of a tote bag. Folding the edges of the opening can effectively increase its durability and extend the bag's lifespan. However, for tote bags made of materials that are not easily deformed, the folded edges of the opening should not be connected by a simple overlapping method. Otherwise, it will not only result in poor flatness at the folded edge connection, but also greatly weaken the reinforcing effect of the folded edges on the tote bag's structure.

[0019] In response, the folding of the opening of a tote bag made of non-deformable materials often needs to be done after the bag body is formed. For example, a separate folding device can be set up after the tote bag body forming device to fold the opening of the tote bag, thereby avoiding the above-mentioned problems.

[0020] However, since the tote bag has already formed a three-dimensional structure after the molding process, if the bag body is folded, it not only requires the coordinated processing of multiple mechanisms, making the process more complicated and affecting the production efficiency of the tote bag, but also poses a risk of damaging the bag body during the folding operation, affecting the yield of the tote bag.

[0021] Therefore, improving the production efficiency and yield of tote bags with the above-mentioned structure is an urgent problem to be solved in the tote bag industry.

[0022] Therefore, this invention provides a molding die for making tote bags. When the molding die is used to make tote bags, the two first side walls move relative to each other, so that the folded edge of the bag opening can be connected by an interlocking method. Then, by using corresponding operations such as pressing, the bag body and the folded edge of the bag opening can be formed simultaneously. This can improve the production efficiency of tote bags and avoid the probability of the bag body being pulled and damaged by other operations after forming. In this way, it can achieve high efficiency and high yield to produce more beautiful and stable tote bags.

[0023] To more clearly illustrate the solution to this case, the following example is provided with diagrams.

[0024] Please refer to Figure 1. First, the structure of the tote bag 10 will be explained as follows.

[0025] The tote bag 10 includes a bottom surface 103, two front surfaces 101 located in the width direction of the bottom surface 103 and arranged opposite each other, and two side surfaces 102 located in the length direction of the bottom surface 103 and arranged opposite each other, with the opposite sides of the two side surfaces 102 overlapping each other.

[0026] It should be understood that, in this case, the connection position between the two opposite sides 102 of the handbag 10 is not limited. For example, it can be located at the halfway point in the width direction of the side 102 of the handbag 10 (as shown in Figure 1), or it can be located at one end in the width direction of the side 102 of the handbag 10.

[0027] The material of the tote bag 10 is not limited; for example, it can be non-woven fabric, leather, plastic, paper, etc.

[0028] The purpose of this case is to find a way to produce the aforementioned tote bag 10 with high efficiency and high yield, and with a beautiful appearance and good structural stability.

[0029] Therefore, in one embodiment of this invention, please refer to Figures 2 and 3, a forming mold 100 for a tote bag is provided. The forming mold 100 can be used to provide shape support for the bag body during the process of forming the sheet material 20 into a tote bag 10. The forming mold 100 includes a mold body 110, and two first side walls 120, two second side walls 130, a bottom wall 140, and two bag body limiting components 150 disposed on the mold body 110.

[0030] In the sidewall design of each molding die 100, two first sidewalls 120 are respectively adapted to the two front faces 101 of the tote bag 10, two second sidewalls 130 are respectively adapted to the two side faces 102 of the tote bag 10, the bottom wall 140 is adapted to the bottom face 103 of the tote bag 10, and two bag body limiting components 150 are respectively adapted to the two first sidewalls 120. Thus, the molding die 100 can support each face of the tote bag 10 by using the two first sidewalls 120, the two second sidewalls 130, and the bottom wall 140, thereby providing shape support for the bag body during the process of molding the sheet material 20 into the tote bag 10, and each bag body limiting component 150 and the corresponding first sidewall 120 together limit the front face 101 of the corresponding tote bag 10.

[0031] Furthermore, for the tote bag 10 with the above structure, before the tote bag 10 is formed from the sheet material 20 into the bag body, the two ends of the sheet material 20 in the length direction 201 are folded inward to form the bag opening fold 104 (see the state shown in Figure 4). Then, during the process of forming the tote bag 10 from the sheet material 20 into the bag body, the side 102 of the bag body and the bag opening fold 104 are sealed at the same time.

[0032] Taking a tote bag 10 made of a non-deformable material as an example, such as a paper bag, in order to avoid poor flatness at the connection of the bag opening fold 104 and affect the structural reinforcement performance of the bag opening fold 104 on the tote bag 10,

[0033] In one embodiment of this invention, at least one of the two first sidewalls 120 is reciprocally connected to the corresponding side of the mold body 110 along the height direction 111 of the mold body 110. In use, since the two front faces 101 of the tote bag 10 are respectively fixed to the corresponding first sidewalls 120 by the two bag-body limiting components 150 (as shown in Figures 8 and 9), when the two first sidewalls 120 move relative to each other, the two front faces 101 of the tote bag 10 can be misaligned in the height direction 111 of the mold body 110 (as shown in Figures 10 and 11), thereby causing the two side faces 102 adjacent to the two front faces 101 to partially misalign. At this time, the connecting portion of the bag opening folded edge 104 of the tote bag 10 is also vertically misaligned. When the two first sidewalls 120 are reset, the misaligned bag opening folds 104 can be interlocked (as shown in Figure 13). Then, by using the corresponding operation of the pressing component 600 and other structures, the bag body and bag opening folds 104 of the tote bag 10 can be formed simultaneously (as shown in Figure 1). The connection of the bag opening folds 104 is sealed by interlocking, which not only avoids the poor flatness of the connection of the bag opening folds 104 of the tote bag 10 from affecting the aesthetics, but also helps the bag opening folds 104 to strengthen the bag body structure of the tote bag 10.

[0034] In the process of forming the tote bag 10 using the above-mentioned molding mold 100, the entire production of the tote bag 10 can be completed after the molding process is finished. There is no need to set up a separate bag opening folding device to perform other operations on the formed bag body. This not only simplifies the production process of the tote bag 10 and improves the production efficiency of the tote bag 10, but also avoids the probability of the tote bag 10 being pulled and damaged by other operations after molding.

[0035] Therefore, when using the molding die 100 provided in this embodiment to manufacture the tote bag 10, it is possible to produce a tote bag 10 with good aesthetics and good structural stability with high efficiency and high yield.

[0036] The specific structure and working principle of the forming mold 100 for the tote bag provided in this case will be further explained in detail below.

[0037] Regarding the mold body 110 of molding die 100: Please refer to Figures 1, 2, and 14. The mold body 110 is the main structure of the entire molding mold 100, providing structural support for the two first side walls 120, the two second side walls 130, the bottom wall 140, and the two bag-body limiting components 150. The structure of the mold body 110 is not limited; it can be a frame structure, such as a mold body 110 formed by splicing horizontal and vertical beams. The mold body 110 is made of a material with high hardness, such as steel.

[0038] It should be understood that the two first sidewalls 120, the two second sidewalls 130, and the bottom wall 140 can all be detachably connected to the mold body 110, for example, through bolt connections. When manufacturing the tote bag 10, for different sizes of tote bags 10, the overall size of the molding mold 100 can be adjusted by only replacing the corresponding sidewalls, or a dedicated mold changing system can be set up to replace the entire molding mold 100.

[0039] Regarding the two first sidewalls 120 of the molding die 100: Please refer to Figures 1, 2, and 14. The two first sidewalls 120 are respectively adapted to the two front faces 101 of the tote bag 10 and are used to support the two front faces 101 of the tote bag 10. That is, during the forming process of the tote bag 10, the two front faces 101 of the tote bag 10 are respectively wrapped around the corresponding first sidewalls 120.

[0040] The structure of the two first sidewalls 120 is not limited. For example, they can both be set as flat plate structures, which can ensure that the surface of the tote bag 10 is flat and smooth, which helps to reduce the problem of shape distortion of the tote bag 10 due to mold deformation, thereby improving the molding quality of the tote bag 10.

[0041] The connection method between the two first sidewalls 120 and the mold body 110 is not subject to unique requirements.

[0042] In one embodiment, one of the two first sidewalls 120 is movably connected to the mold body 110, and the other first sidewall 120 is fixed to the mold body 110 as a whole.

[0043] In this implementation, one possible solution is that a first sidewall 120 drives a front side 101 of the tote bag 10 to move downward along the height direction of the mold body 110 and then upward, so that the bag opening folds 104 of the two sides 102 adjacent to one front side 101 of the tote bag 10 are respectively inserted into the bag opening folds 104 of the two sides 102 adjacent to the other front side 101.

[0044] To illustrate this solution more clearly, refer to Figures 3, 6, 8, and 11. One of the front faces 101 can be referred to as the "first front face 1011". The first front face 1011 corresponds to the right first side wall 1201 of the two first side walls 120. The other front face 101 can be referred to as the "second front face 1012". The second front face 1012 corresponds to the left first side wall 1202.

[0045] In the initial state, the pocket opening folds 104 of the four sides 102 of the handbag 10 (two adjacent to the first front 1011 and two adjacent to the second front 1012) have not yet been inserted (as shown in Figures 8 and 9).

[0046] When the bag opening fold 104 needs to be inserted, the first side wall 1201 on the right side moves the first front side 1011 downward along the height direction 111 of the mold body 110 (as shown in Figures 10 and 11). When the first front side 1011 descends to a certain position, the bag opening folds 104 of the two adjacent sides 102 will naturally bend inward to prepare for subsequent insertion.

[0047] Next, the first sidewall 1201 on the right side moves the first front side 1011 upward along the height direction 111 of the mold body 110. During this process, the bag opening folds 104 of the two sides 102 adjacent to the first front side 1011 will be inserted into the bag opening folds 104 of the two sides 102 adjacent to the second front side 1012, completing the insertion (as shown in Figure 13).

[0048] Another possible solution is that a first sidewall 120 drives one front side 101 of the tote bag 10 to move upward along the height direction of the mold body 110 and then downward, so that the bag opening folds 104 of the two sides 102 adjacent to the other front side 101 of the tote bag 10 are respectively inserted into the bag opening folds 104 of the two sides 102 adjacent to the front side 101.

[0049] To illustrate this solution more clearly, it is not shown in the figure. For easier understanding, please refer to Figures 3, 6, 8, and 11. Similarly, one of the front faces 101 can be called "first front face 1011". The first front face 1011 corresponds to the right first side wall 1201 of the two first side walls 120. The other front face 101 can be called "second front face 1012". The second front face 1012 corresponds to the left first side wall 1202.

[0050] In the initial state, the opening folds 104 of the four sides 102 of the tote bag 10 (two adjacent to the first front 1011 and two adjacent to the second front 1012) have not yet been inserted.

[0051] When the bag opening fold 104 needs to be inserted, in contrast to the first scheme, the first sidewall 1201 on the right side first moves the first front side 1011 upward along the height direction 111 of the mold body 110. When the first front side 1011 rises to a certain position, the bag opening folds 104 of the two adjacent sides 102 will also change accordingly.

[0052] Then, the first sidewall 1201 on the right side moves the first front side 1011 downward along the height direction 111 of the mold body 110. At this time, the bag opening folds 104 of the two sides 102 adjacent to the second front side 1012 will be inserted into the bag opening folds 104 of the two sides 102 adjacent to the first front side 1011, thus completing the insertion.

[0053] In another embodiment, both first sidewalls 120 are movably connected to the mold body 110 along the height direction of the mold body 110. In use, one first sidewall 120 can drive one front side 101 of the tote bag 10 to move downward along the height direction of the mold body 110 and then upward, while the other first sidewall 120 can drive one front side 101 of the tote bag 10 to move upward along the height direction of the mold body 110 and then downward, so that the bag opening folds 104 of the two sides 102 adjacent to one front side 101 of the tote bag 10 are respectively inserted into the bag opening folds 104 of the two sides 102 adjacent to the other front side 101.

[0054] For clarity, this scheme is not shown in the figure. For ease of understanding, please refer to Figures 3, 6, 8, and 11. Similarly, one of the front faces 101 can be called "first front face 1011". The first front face 1011 corresponds to the right first side wall 1201 of the two first side walls 120. The other front face 101 can be called "second front face 1012". The second front face 1012 corresponds to the left first side wall 1202.

[0055] In the initial state, the opening folds 104 of the four sides 102 of the tote bag 10 (two adjacent to the first front 1011 and two adjacent to the second front 1012) have not yet been inserted.

[0056] When the bag opening fold 104 needs to be inserted, the right first sidewall 1201 moves the first front face 1011 downward along the height direction 111 of the mold body 110. This action causes the bag opening folds 104 of the two sides 102 adjacent to the first front face 1011 to begin to bend inward (closer to the mold side), preparing for the subsequent insertion. Then, the right first sidewall 1201 moves the first front face 1011 upward.

[0057] Simultaneously, the first sidewall 1202 on the left side causes the second front side 1012 adjacent to it to move upward along the height direction 111 of the mold body 110. This action also causes the bag opening folds 104 of the two sides 102 adjacent to the second front side 1012 to begin to change (begin to bend away from the mold side), preparing for insertion. Then, the first sidewall 1202 on the left side causes the second front side 1012 to move downward.

[0058] It should be understood that in this embodiment, the right first sidewall 1201 and the left first sidewall 1202 can operate simultaneously, or one can operate slightly later than the other, depending on the actual needs.

[0059] During the reciprocating movement of the right first sidewall 1201 and the left first sidewall 1202 in two directions, the pocket opening folds 104 of the two sides 102 adjacent to the first front 1011 are inserted into the pocket opening folds 104 of the two sides 102 adjacent to the second front 1012. In this way, the pocket opening of the tote bag 10 is completed.

[0060] In this implementation, by controlling the movement of the two first sidewalls 120, the travel distance of each first sidewall 120 can be reduced, thereby improving the insertion efficiency of the bag opening fold 104.

[0061] In the various configurations of the first sidewall 120 described above, the movable connection between the first sidewall 120 and the mold body 110 can be a sliding connection or a rolling connection.

[0062] In one feasible implementation, as shown in FIG14, the molding die 100 further includes a guide member 170 disposed between at least one of the two first sidewalls 120 and the die body 110, and a drive member 180 for driving at least one of the two first sidewalls 120 to move.

[0063] Specifically, the guide member 170 is fixedly connected to the mold body 110 and located on the inner side of the corresponding first side wall 120. The guide member 170 extends at a preset angle relative to the height direction 111 of the mold body 110. For example, in the height direction 111 of the mold body 110, the upper end of the guide member 170 is further away from the inner wall of the corresponding first side wall 120 than the lower end.

[0064] When the first sidewall 120 is connected to the mold body 110, it can be slidably connected to the guide member 170. The driving member 180 is fixedly connected to the mold body 110 and located on one side of the guide member 170. The driving end of the driving member 180 is connected to the first sidewall 120 in a transmission connection so as to drive the first sidewall 120 to move along the guide member 170.

[0065] Regarding the structure and arrangement of the guide member 170, please refer to Figure 14. The guide member 170 may include a plurality of guide rails, for example, four guide rails are provided. The four guide rails are evenly arranged in the plane where the inner wall surface of the first side wall 120 is located, for example, they are arranged symmetrically in pairs.

[0066] Please refer to Figure 15 for further details. The length of each guide rail is set as follows: L≥H / cosA; where L is the length of the guide rail; H is the width of the bag opening fold 104; and A is the preset angle of the guide rail tilt.

[0067] It should be understood that the number of guide rails is not limited to 4; it can also be 2, 3, 5, or other numbers. The preset angle of the guide rail tilt is not limited; for example, it can be set between 10° and 30°. The width of the bag opening fold 104 can be determined according to the specific bag shape of the tote bag 10.

[0068] Furthermore, when the first sidewall 120 is connected to the guide rail, a slider may be provided on the inner wall surface of the first sidewall 120, and the first sidewall 120 is slidably connected to the guide rail through the slider.

[0069] The structure and number of driving components 180 are not limited. For example, driving components 180 can be cylinders, electric push rods, etc. There can be two driving components 180. The two driving components 180 can be distributed on both sides of the width direction of the first side wall 120, which is beneficial to the stability of the first side wall 120 when it moves.

[0070] Regarding the control of the driving component 180, it can be that the driving component 180 has its own control element (see Figures 2 and 3), or it can be that a solenoid valve 191 is set on the mold body 110. When the driving component 180 is set as an electric cylinder or an electric push rod, the solenoid valve 191 is electrically connected to the electric cylinder or electric push rod. When the solenoid valve 191 controls the push rod of the electric cylinder or electric push rod to extend, it can drive the first side wall 120 to move up or down, so as to achieve the misalignment of the bag opening folds 104 on both sides of the side 102 of the tote bag 10. When the solenoid valve 191 controls the push rod of the electric cylinder or electric push rod to retract, it can drive the first side wall 120 to reset, so as to achieve the insertion of the bag opening folds 104 on both sides of the side 102 of the tote bag 10. In this way, the moving distance of the first side wall 120 can be precisely controlled, thereby further improving the stability of the insertion of the bag opening folds 104.

[0071] In this embodiment, by providing the guide member 170, precise guidance is provided for the movement of the first sidewall 120, ensuring the stability and accuracy of the first sidewall 120 during the movement process, thereby improving the accuracy of the insertion of the bag opening fold 104.

[0072] Furthermore, in the height direction 111 of the mold body 110, the guide member 170 is designed to be inclined, that is, the upper end of the guide member 170 is further away from the inner wall of the corresponding first side wall 120 than the lower end. This design helps to ensure that the bag opening folds 104 on both sides of the side 102 are inserted with a larger area first, and then gradually inserted to the required position during the insertion process. This is more conducive to the success rate of the insertion of the bag opening folds 104 on both sides of the side 102.

[0073] In the various configurations of the first sidewall 120 described above, the fixed connection between the first sidewall 120 and the mold body 110 can be achieved by fixing the first sidewall 120 and the mold body 110 together with bolts.

[0074] Specifically, the first sidewall 120 may include a plurality of strip plates, which are bolted to the edge of the mold body 110 in the width direction, or the plurality of strip plates are bolted to the periphery of the mold body 110, and the first sidewall 120 is formed by overlapping the plurality of strip plates.

[0075] Based on the structure and arrangement of the first sidewall 120 described above, the structure and arrangement of the two bag limiting components 150 will be explained below.

[0076] Of the two bag-body limiting assemblies 150, the bag-body limiting assembly 150 adapted to the first sidewall 120 that is reciprocally movable relative to the mold body 110 includes a gripping component, which is fixedly disposed on the outer wall surface of the corresponding first sidewall 120; the bag-body limiting assembly 150 adapted to the first sidewall 120 that is fixedly disposed on the mold body 110 includes a pressing component, which is separably pressed against the outer wall surface of the first sidewall 120 along the thickness direction 112 of the mold body 110.

[0077] It should be understood that if both first sidewalls 120 are reciprocally connected to the corresponding side of the mold body 110 along the height direction 111 of the mold body 110, then both bag limiting components 150 can be configured as gripping components.

[0078] If one first sidewall 120 is reciprocally connected to the corresponding side of the mold body 110 along the height direction 111 of the mold body 110, and the other is fixedly disposed on the corresponding side of the mold body 110, then one of the two bag limiting components 150 is configured as a gripping component and the other is configured as a pressing component.

[0079] By setting a gripping component on the movable first sidewall 120, the gripping component can not only fix the tote bag 10, but also move synchronously with the first sidewall 120. The insertion of the bag opening fold 104 of the tote bag 10 can be achieved on the basis of simplifying the structure of the molding die 100 as much as possible.

[0080] Of course, in both of the above cases, both bag limiting components 150 can be set as pressing components. The pressing component corresponding to the movable first side wall 120 is set on one side of the first side wall 120 through the lifting component. That is, the first side wall 120 can move synchronously with the corresponding pressing component to fix the front 101 of the tote bag 10 on the movable first side wall 120.

[0081] The structure of the lifting components is not limited; for example, it can be a lifting motor, a lifting cylinder, etc.

[0082] The specific structure and configuration of the gripping components are not limited; for example, they can be suction cups, grippers, etc.

[0083] In one embodiment, referring to Figures 2 and 3, the gripping component includes a plurality of suction cups (see the structure shown in 150), and a plurality of suction cup mounting holes are formed on the corresponding first sidewall 120. The plurality of suction cup mounting holes are evenly distributed and penetrate the first sidewall 120. Each suction cup is respectively disposed in the corresponding suction cup mounting hole, and the edge of the suction nozzle of the suction cup is flush with the outer wall surface of the corresponding first sidewall 120. The suction cup is connected to the vacuum generator pipeline.

[0084] There is no limit to the number of suction cups that can be set; for example, there can be any number such as 4 or 5.

[0085] Furthermore, the suction cup can be extended and disposed in the suction cup mounting hole. For example, the suction cup can be extended and disposed on the wall of the suction cup mounting hole using an electric telescopic rod. When the molding mold 100 moves from top to bottom to the front 101 of the bag body close to the first side wall 120, the suction cup extends, sucks on the front 101 of the corresponding side of the bag body and retracts to the suction cup mounting hole, so that the front 101 of the bag body is attached to the outer wall surface of the first side wall 120.

[0086] In this embodiment, the suction cup gripping component is relatively simple to operate, allowing for quick and accurate gripping and release of the tote bag 10, thus shortening the production cycle. Multiple suction cups evenly distributed throughout the first sidewall 120 ensure uniform suction force when gripping the front 101 of the tote bag 10, preventing misalignment or deformation of the tote bag 10 during the forming process. The suction nozzle edge is flush with the outer wall surface of the first sidewall 120, making the gripping component more stable when contacting the tote bag 10, reducing damage caused by friction or collision. Furthermore, the suction cups do not scratch or indent the surface of the tote bag 10 when gripping it, protecting the integrity and aesthetics of the tote bag 10.

[0087] In another embodiment, not shown, the gripping component includes a clamping member disposed on the top edge of the corresponding first sidewall 120. The clamping member may be an electric gripper, a pneumatic gripper, a clamping plate, etc. When the front 101 of the tote bag 10 is close to the corresponding first sidewall 120, the clamping member and the first sidewall 120 together clamp the corresponding front 101 of the tote bag 10.

[0088] In this embodiment, the clamping member can be disposed on the top edge of the first side wall 120. When the molding mold 100 moves from top to bottom to the front 101 of the bag body close to the first side wall 120, the electric gripper automatically clamps the upper edge of the front 101 of the tote bag 10, so that it is fixed relative to the first side wall 120. This design can ensure that the tote bag 10 is accurately clamped and positioned during the molding process.

[0089] In addition, the clamping components are highly adjustable, which can not only adapt to tote bags 10 of different thicknesses and materials, but also limit the corresponding front side 101 of the tote bag 10 in various directions, resulting in a low probability of detachment.

[0090] The specific structure and arrangement of the pressing component are not limited; for example, it can be a pressure plate, track, etc.

[0091] In one embodiment, the pressing component includes a flexible pressing member and a movable seat. The flexible pressing member can be a rubber plate. The movable seat is movably disposed on the frame along the thickness direction 112 of the mold body 110. The flexible pressing member is fixedly connected to the movable seat and extends toward the corresponding first side wall 120. When the front 101 of the tote bag 10 approaches the corresponding first side wall 120, the movable seat moves closer along the thickness direction 112 of the mold body 110, so that the flexible pressing member squeezes the front 101 of the tote bag 10 and fixes it to the corresponding first side wall 120.

[0092] When the tote bag 10 is formed using this molding die 100, when the molding die 100 is lowered to its lowest position, the sheet material 20 bends toward the molding die 100 under the limiting action of the components around the molding die 100 (e.g., the inner wall surface of the molding die receiving area). At this time, the front face 101 of the tote bag 10 will approach the first side wall 120. Furthermore, in subsequent steps, other components (e.g., flexible pressing components) on the side of the molding die 100 can be used to press the front face 101 of the tote bag 10 so that the front face 101 of the tote bag 10 is completely fitted with the first side wall 120.

[0093] Furthermore, based on the structure and arrangement of the first sidewall 120 described above, referring to Figures 2 and 3, in this embodiment, at least one of the two first sidewalls 120 is also provided with a vent hole 121. The vent hole 121 may be provided on both first sidewalls 120, or it may be provided on only one of the first sidewalls 120. The vent hole 121 may be a plurality of strip-shaped holes formed on the first sidewall 120, for example, 3, 4, or 5 strip-shaped holes may be provided.

[0094] By providing ventilation holes 121, a vacuum can be avoided between the front 101 of the tote bag 10 and the outer wall of the first side wall 120, thus preventing interference with subsequent bag removal.

[0095] Regarding the two second sidewalls 130 of molding die 100: Referring to Figures 2 and 3, the two second sidewalls 130 are respectively adapted to the two sides 102 of the tote bag 10 and are used to support the two sides 102 of the tote bag 10. That is, during the forming process of the tote bag 10, the two sides 102 of the tote bag 10 are respectively wrapped around the corresponding second sidewalls 130.

[0096] The structure of the two second sidewalls 130 is not limited. For example, they can both be set as flat plate structures, which can ensure that the surface of the tote bag 10 is flat and smooth, which helps to reduce the problem of shape distortion of the tote bag 10 due to mold deformation, thereby improving the molding quality of the tote bag 10.

[0097] The connection method between the two second sidewalls 130 and the mold body 110 is not limited to one. For example, the two second sidewalls 130 can be detachably connected to the mold body 110 by bolts, thereby fixing them together with the mold body 110.

[0098] Furthermore, in the molding die 100 provided in this case, in order to improve the success rate of inserting the bag opening fold 104, the molding die 100 provided in this case also includes two fold opening components 160 respectively disposed at corresponding positions on the two second side walls 130. When the bag opening fold 104 formed by the two ends of the sheet material 20 in the length direction is pressed and close to the second side wall 130, the fold opening component 160 can open the bag opening fold 104 of the side of the two sides 102 of the tote bag 10 that is further away from the second side wall 130.

[0099] Using this structure, when the sheet material 20 of the tote bag 10 is pre-folded inward to form the bag opening fold 104, even if the opening angle of the bag opening fold 104 is small, or if the bag opening fold 104 is stuck to the bag body due to static electricity or other factors, when the sheet material 20 is pressed close to the second side wall 130, the fold opening component 160 can accurately open the fold of the inserted bag opening fold 104. At least one of the two first side walls 120 drives at least one front side 101 of the tote bag 10 and links at least one of the two sides 102 of the tote bag 10 to reciprocate relative to the mold body 110, so that the bag opening fold 104 of the other side 102 of the tote bag 10 can be inserted into the bag opening fold 104 of the other side 102, thereby realizing the smooth insertion of the two bag opening folds 104. This can greatly improve the success rate of inserting the bag opening folds 104 and further improve the yield of the tote bag 10.

[0100] The structure and arrangement of the two folded-edge opening components 160 are described in further detail below.

[0101] In one embodiment, both folded opening components 160 include an air suction member (the structure shown in Figures 2 and 3), wherein the air suction member is disposed on the second side wall 130, and the position of the air suction member in the height direction 111 of the mold body 110 corresponds to the bag opening folded edge 104 of the corresponding side 102 of the tote bag 10, and the air suction port of the air suction member is flush with the outer wall surface of the second side wall 130.

[0102] In this embodiment, the suction component can be configured as a suction cup, and the second side wall 130 is provided with corresponding mounting holes. The suction cup is installed in the mounting holes, and the suction port of the suction cup is flush with the outer wall surface of the second side wall 130.

[0103] During use, when the two ends of the sheet material 20, which are pre-folded inward to form the bag opening fold 104, are pressed close to the second side wall 130, the suction component generates negative pressure (i.e., pressure lower than atmospheric pressure) through the suction port, attracting the material of the bag opening fold 104 and making it adhere tightly to the suction port. With the continuous action of the suction force, the bag opening fold 104 is gradually pulled open, thereby achieving the purpose of opening the bag opening fold 104. Utilizing this structure, when the sheet material 20 of the tote bag 10 is pre-folded inward to form the bag opening fold 104, even if the opening angle of the bag opening fold 104 is small, or if the bag opening fold 104 is stuck to the bag body due to static electricity or other factors, when the sheet material 20 is pressed close to the second side wall 130, the fold opening component 160 can accurately open the fold of the inserted bag opening fold 104, which can greatly improve the success rate of inserting the bag opening fold 104.

[0104] Furthermore, a vacuum generator 192 is also provided on the mold body 110. The vacuum generator 192 is connected to the suction component pipeline and is used to provide negative pressure for the suction component.

[0105] Furthermore, by making the suction port of the suction cup flush with the outer wall surface of the second side wall 130, when the bag opening fold 104 is sucked open, the bag opening fold 104 can adhere to the outer wall surface of the second side wall 130, thereby making the opening angle of the bag opening fold 104 more uniform.

[0106] In another embodiment, both folded opening components 160 include an air blowing member (not shown), which is disposed on the second side wall 130. The position of the air blowing member in the height direction 111 of the mold body 110 corresponds to the area below the bag opening folded edge 104 of the side 102 of the corresponding side of the tote bag 10, and the air blowing port of the air blowing member is flush with the outer wall surface of the second side wall 130.

[0107] In this embodiment, the air blowing component can be configured as an air blowing nozzle. A corresponding mounting hole is provided on the second sidewall 130, and the air blowing nozzle is installed in the mounting hole, with the air outlet of the nozzle flush with the outer wall surface of the second sidewall 130. The air blowing nozzle can be connected to an external air pump pipeline.

[0108] During use, when the bag opening fold 104, formed by folding the two ends of the sheet material 20 inward along its length, is pressed close to the second side wall 130, as shown in Figure 12, the air pressure blown out by the nozzle first acts on the side 102 of the tote bag 10. Part of the airflow will flow along the side 102 of the tote bag 10 towards the bag opening to the position of the bag opening fold 104. At this time, the tension generated by the airflow reaching the bag opening will cause the bag opening fold 104 to open, thereby achieving the purpose of opening the bag opening fold 104. With this structure, when the sheet material 20 of the tote bag 10 is folded inward to form the bag opening fold 104, even if the opening angle of the bag opening fold 104 is small, or if the bag opening fold 104 is stuck to the bag body due to static electricity or other factors, when the sheet material 20 is pressed close to the second side wall 130, the fold opening component 160 can still accurately open the fold of the inserted bag opening fold 104, which can greatly improve the success rate of inserting the bag opening fold 104.

[0109] Furthermore, by making the air inlet of the air blowing member flush with the outer wall surface of the second side wall 130, interference of the air blowing member with the side 102 of the handbag 10 can be avoided.

[0110] Regarding the bottom wall 140 of molding die 100: Please refer to Figures 2 and 3. The bottom wall 140 is adapted to the bottom surface 103 of the tote bag 10 to support the bottom surface 103 of the tote bag 10. That is, during the forming process of the tote bag 10, the bottom surface 103 of the tote bag 10 is wrapped around the corresponding bottom wall 140.

[0111] The structure of the bottom wall 140 is not limited. For example, it can be set as a flat plate structure, which can ensure that the surface of the tote bag 10 is flat and smooth, which helps to reduce the problem of shape distortion of the tote bag 10 due to mold deformation, thereby improving the molding quality of the tote bag 10.

[0112] The connection method between the bottom wall 140 and the mold body 110 is not limited to one. For example, the bottom wall 140 can be detachably connected to the mold body 110 by bolts, thereby fixing it as a whole with the mold body 110.

[0113] Furthermore, in order to fix the bottom surface 103 of the tote bag 10 relative to the bottom wall 140, a bottom support plate can be provided below the bottom wall 140. The bottom support plate can be moved upward to fix the bottom surface 103 of the tote bag 10 relative to the bottom wall 140.

[0114] Alternatively, the molding die 100 may also include an adsorption component, which may be a suction cup. The adsorption component is disposed on the bottom wall 140 and is used to adsorb the bottom surface 103 of the tote bag 10 and make the bottom surface 103 of the tote bag 10 adhere to the outer wall surface of the bottom wall 140. That is, the bottom surface 103 of the tote bag 10 can be fixed relative to the bottom wall 140 without setting a bottom support plate.

[0115] Based on the above-described molding die 100, referring to Figures 16 and 17, this invention also provides a molding die assembly for a tote bag. The molding die assembly includes a receiving platform 200, the receiving platform 200 forming a molding area 210, and the molding die 100 with the above-described structure is disposed above the receiving platform 200 at a position corresponding to the molding area 210. The molding die 100 is movably disposed above the molding area 210 in the vertical direction.

[0116] Furthermore, the molding die assembly also includes a side insert assembly 300 disposed below the receiving platform 200 and movably disposed along the thickness direction 112 of the die body 110. When the molding die 100 moves from top to bottom and the sheet material 20 bends toward the two first side walls 120 of the die body 110, the side insert assembly 300 moves toward the die body 110 to press the opposite sides of the two sides 102 of the tote bag 10 to bend toward the second side wall 130. The side insert assembly 300 may be a side insert plate movably disposed along the thickness direction 112 of the die body 110.

[0117] Furthermore, the molding die assembly also includes a lifting component 400 disposed above the receiving platform 200. A connecting plate 113 is fixedly disposed above the die body 110, and the die body 110 is connected to the drive end of the lifting component 400 through the connecting plate 113. The lifting component 400 may include a lifting motor and a transmission component. The transmission component may be a transmission belt. One end of the transmission belt is connected to the drive shaft of the lifting motor through a pulley, and the other end of the transmission belt is connected to the connecting plate 113 through a pulley, thereby enabling the lifting motor to move the molding die 100 vertically through the transmission belt.

[0118] In use, for example, when the sheet material 20 is conveyed to the forming area 210 (see the states shown in Figures 5 and 16), the lifting motor drives the forming mold 100 to descend, so that the two front sides 101 of the sheet material 20 gradually bend toward the outer periphery of the forming mold 100 under the combined action of the forming mold 100 and the receiving platform 200 (see the state shown in Figure 6), and then the side insert assembly 300 pushes the two side sides 102 to bend toward the two second side walls 130 respectively (see the state shown in Figure 9).

[0119] It is important to understand that after the side insertion assembly 300 pushes the two side surfaces 102 to bend towards the two second side walls 130 respectively, and the connection positions of the two side surfaces 102 coincide, the gripping component or pressing component is controlled to fix the two front surfaces 101 to the outer wall surface of the first side wall 120 respectively. Based on the design of the molding mold 100 described above, a gripping component, such as a suction cup, can be provided on the right first side wall 1201 to fix the first front surface 1011 to the right first side wall 1201; a pressing component is provided on one side of the left first side wall 1202, and the pressing component is controlled to move towards the molding mold 100 to fix the second front surface 1012 to the left first side wall 1202 (as shown in Figure 7).

[0120] In this embodiment, the molding die assembly also includes a bag removal assembly 500. Specifically, referring to Figures 16 and 17, the bag removal assembly 500 includes a bag removal belt 510 facing the die body 110, and the bag removal belt 510 can move along the thickness direction 112 of the die body 110. After the two sides 102 are pushed to bend toward the two second side walls 130 by the side insertion assembly 300, the bag removal belt 510 of the bag removal assembly 500 can be controlled to approach the first side wall 120. The bag removal belt 510 of the bag removal assembly 500 presses and fixes the front 101 of the tote bag 10 between it and the first side wall 120.

[0121] The molding die assembly provided in this case adopts the above-described molding die 100 structure, which enables the molding die assembly to simultaneously form the bag body and the bag opening fold 104 of the tote bag 10 during the molding process of the tote bag 10. This not only makes the function of the molding die assembly more diversified, but also greatly improves the production efficiency of the tote bag 10.

[0122] The above description illustrates the implementation of this invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of this invention from the content disclosed in this specification. Although the description of this invention is presented in conjunction with preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of describing this invention in conjunction with embodiments is to cover other options or modifications that may arise based on the claims of this invention. To provide a thorough understanding of this invention, many specific details are included in the above description. This invention can also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this 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 this invention can be combined with each other.

[0123] It should be noted that in this specification, similar symbols and letters represent similar items in the following diagrams. Therefore, once an item is defined in one diagram, it does not need to be further defined and explained in subsequent diagrams.

[0124] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", and "bottom" is based on the orientation or positional relationship shown in the diagram, or the orientation or positional relationship that the product is usually placed in during use. It is only for the convenience of describing this embodiment and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on this embodiment.

[0125] The terms “first” and “second” are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0126] 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. For those skilled in the art, the specific meaning of the above terms in this embodiment can be understood according to the specific circumstances.

[0127] 10: Tote bag 101: Front 1011: First Front 1012: Second Front 102: Side view 103: Bottom surface 104: Bag opening hem 20: Sheet material 201: Length direction 100: Molding mold 110: Mold body 111: Height Direction 112: Thickness direction 113: Connecting plate 120: First sidewall 1201: Right side wall 1202: First sidewall on the left 121: Ventilation holes 130: Second sidewall 140:Bottom wall 150: Bag body limiting component 160: Folded-edge opening component 170: Guide component 180: Driving component 191: Solenoid valve 192: Vacuum Generator 200: Receiving Platform 210: Molding area 300: Side-mounted assembly 400: Lifting Component 500: Bag Removal Component 510: Bag-removing belt 600: Press component

Claims

1. A molding die for a tote bag, used to provide shape support for the bag body during the process of molding a sheet material into the tote bag, the tote bag including a bottom surface, two front surfaces located in the width direction of the bottom surface and arranged opposite to each other, and two side surfaces located in the length direction of the bottom surface and arranged opposite to each other, the opposite sides of the two side surfaces overlapping each other; characterized in that the molding die includes a die body, and two first side walls disposed on the die body and adapted to the two front surfaces of the tote bag, two second side walls adapted to the two side surfaces of the tote bag, a bottom wall adapted to the bottom surface of the tote bag, and two bag body limiting components adapted to the two first side walls respectively; at least one of the two first side walls is reciprocally connected to a corresponding side of the die body along the height direction of the die body; Each of the bag-body limiting components, together with a corresponding first sidewall, limits the front of the corresponding tote bag; and when the bag opening folds formed by the pre-folded inwards at both ends of the sheet material in the length direction are pressed close to the second sidewall, at least one of the two first sidewalls and the front of the adjacent tote bag reciprocate together relative to the mold body, such that the bag opening folds at the upper ends of the two sides of the tote bag interlock with each other in the height direction of the mold body.

2. The molding die for the tote bag as described in claim 1, wherein, Of the two bag-body limiting assemblies, the bag-body limiting assembly adapted to the first sidewall that is reciprocally movable relative to the mold body includes a gripping component, which is fixedly disposed on the outer wall surface of the corresponding first sidewall; and of the two bag-body limiting assemblies, the bag-body limiting assembly adapted to the first sidewall that is fixedly disposed on the mold body includes a pressing component, which is separably pressed against the outer wall surface of the first sidewall along the thickness direction of the mold body.

3. The molding die for the tote bag as described in claim 2, wherein, The gripping component includes a plurality of suction cups, and a plurality of suction cup mounting holes are formed on the corresponding first sidewall. The plurality of suction cup mounting holes are evenly distributed and penetrate the first sidewall. Each suction cup is respectively disposed in the corresponding suction cup mounting hole, and the edge of the suction nozzle of the suction cup is flush with the outer wall surface of the corresponding first sidewall.

4. The molding die for the tote bag as described in claim 2, wherein, The gripping component includes a clamping member disposed on the top edge of the corresponding first sidewall. When the front of the tote bag is close to the corresponding first sidewall, the clamping member and the first sidewall together clamp the corresponding front of the tote bag.

5. The molding die for the tote bag as described in claim 2, wherein, The pressing component includes a flexible pressing element and a movable seat. The movable seat is movably mounted on the frame along the thickness direction of the mold body. The flexible pressing element is fixedly connected to the movable seat and extends toward the corresponding first side wall. When the front of the tote bag approaches the corresponding first side wall, the movable seat moves along the thickness direction of the mold body and approaches the flexible pressing element, which then presses the front of the tote bag to fix it to the corresponding first side wall.

6. A molding die for a tote bag as described in claim 1, wherein, The molding die also includes two folding opening components respectively disposed at corresponding positions on the two second side walls. When the bag opening folds formed by the two ends of the sheet material in the length direction are pressed close to the second side wall, the folding opening components cause the bag opening fold of the side of the two sides of the tote bag that is further away from the second side wall to open. At least one of the two first side walls drives at least one front side of the tote bag and moves at least one of the two sides of the tote bag back and forth relative to the mold body, so that the bag opening fold of the other side of the two sides of the tote bag is inserted into the bag opening fold of the first side.

7. The molding die for the tote bag as described in claim 6, wherein, Both of the folded opening components include an air suction component; the air suction component is disposed on the second side wall and corresponds to the position of the bag opening fold on the corresponding side of the handbag in the height direction of the mold body, and the air suction port of the air suction component is flush with the outer wall surface of the second side wall.

8. The molding die for the tote bag as described in claim 6, wherein, Both of the folded opening components include an air blowing component; the air blowing component is disposed on the second side wall and corresponds to the area below the bag opening fold on the side of the corresponding side of the tote bag in the height direction of the mold body, and the air inlet of the air blowing component is flush with the outer wall surface of the second side wall.

9. A mold for forming a tote bag as described in claim 1, wherein, The molding die further includes a guide member disposed between at least one of the two first sidewalls and the die body, and a driving member for driving at least one of the two first sidewalls to move; the guide member is fixedly connected to the die body and located inside the corresponding first sidewall, and the guide member extends at an inclined angle relative to the height direction of the die body at a preset angle, the first sidewall is slidably connected to the guide member, the driving member is fixedly connected to the die body and located on one side of the guide member, and the driving end of the driving member is kinetically connected to the first sidewall; and in the height direction of the die body, the upper end of the guide member is further away from the inner wall of the corresponding first sidewall than the lower end.

10. A molding die for a tote bag as described in claim 9, wherein, The guide component includes a plurality of guide rails, which are evenly arranged in the plane containing the inner wall surface of the first sidewall, and the length of each guide rail is set to L≥H / cosA; where L is the length of the guide rail; H is the width of the bag opening fold; and A is the preset angle of inclination of the guide rail.

11. A molding die for a tote bag as described in claim 1, wherein, The molding die also includes an adsorption component disposed on the bottom wall, the adsorption component being used to adsorb the bottom surface of the tote bag and make the bottom surface of the tote bag adhere to the outer wall surface of the bottom wall.

12. A molding die for a tote bag as described in claim 1, wherein, The two first sidewalls, the two second sidewalls, and the bottom wall are all configured as planar plate structures; and at least one of the two first sidewalls is provided with a vent hole, and the two second sidewalls and the bottom wall are all fixed to the mold body as a whole.

13. A mold for forming a tote bag as described in any one of claims 1 to 12, wherein, One of the two first sidewalls is movably connected to the mold body, and the other first sidewall is fixed to the mold body as a whole; the first sidewall causes one front of the tote bag to move downward along the height direction of the mold body and then upward, so that the bag opening folds of the two sides of the tote bag adjacent to the first front are respectively inserted into the bag opening folds of the two sides adjacent to the other front; or, the first sidewall causes one front of the tote bag to move upward along the height direction of the mold body and then downward, so that the bag opening folds of the two sides of the tote bag adjacent to the other front are respectively inserted into the bag opening folds of the two sides adjacent to the first front.

14. A mold for forming a tote bag as described in any one of claims 1 to 12, wherein, Both first sidewalls are movably connected to the mold body along the length of the mold body; one first sidewall causes one front of the tote bag to move downward along the height direction of the mold body and then upward, and the other first sidewall causes one front of the tote bag to move upward along the height direction of the mold body and then downward, so that the bag opening folds of the two sides of the tote bag adjacent to the one front are respectively inserted into the bag opening folds of the two sides adjacent to the other front.

15. A molding die assembly for a tote bag, characterized in that it includes a receiving platform, the receiving platform forming a molding area, and a molding die as described in any one of claims 1 to 14 is disposed above the receiving platform at a position corresponding to the molding area; the molding die is movably disposed above the molding area in a vertical direction, and when the sheet material is conveyed to the molding area, the molding die moves from top to bottom such that the two front sides of the tote bag respectively abut against the two first sidewalls of the molding die.

16. The molding die assembly for the tote bag as described in claim 15, wherein, It also includes a side insert assembly disposed below the receiving platform and movably disposed along the thickness direction of the mold body. When the forming mold moves from top to bottom until the sheet material bends toward the two first side walls of the mold body, the side insert assembly moves toward the mold body to press the opposite sides of the two sides of the tote bag toward the second side wall.

17. The molding die assembly for the tote bag as described in claim 15, wherein, It also includes a lifting assembly disposed above the receiving platform, and a connecting plate is fixedly disposed above the mold body, the mold body being connected to the drive end of the lifting assembly through the connecting plate.

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