A bag opening machine and bag opening process

Abstract

This invention relates to a bag opening machine and a bag opening process, comprising a frame, a folding device with folding structures on both sides along the X direction, a Y-direction driving device including a Y-direction power, and a folding and pressing frame device including a movable frame, a Y-direction folding unit, and a pressing mechanism for constraining the fabric. The movable frame is connected to the frame and forms a moving pair with the frame along the Y direction. The Y-direction folding unit is disposed on the movable frame and includes two folding forming modules adapted to the folding structures. The two folding forming modules are arranged opposite to each other, and a gap is formed between the two folding forming modules for the insertion of the folding device. The Y-direction power is drivenly connected to the movable frame. The position of the folding and pressing frame device along the Y direction is adjusted by the Y-direction power so that the folding forming modules and the corresponding folding structures form a folding fit, thereby realizing the folding of the bag opening on both sides along the X direction. This bag opening machine can meet the folding requirements of bag openings of different widths, which not only improves versatility but also facilitates fully automatic bag opening.

Description

Technical Field

[0001] This invention relates to the field of bag opening equipment technology, specifically to a bag opening machine and a bag opening process. Background Technology

[0002] A bag-opening device (also known as a bag-opening machine, bag-opening sewing machine, etc.) is a sewing machine specifically designed for sewing bags. It is mainly used for sewing pockets, zippers, and other parts in the clothing, bag, and other industries, and is widely used in the sewing industry.

[0003] Existing bag-opening equipment typically includes a cutting device, a sewing device, a folding device, and a pressing frame device adapted to the folding device. The cutting device is primarily used for cutting the fabric, the sewing device is primarily used for sewing the fabric, the pressing frame device is primarily used for tensioning and transferring the fabric, and the folding device is primarily used for forming the bag opening on the fabric. The bag opening is typically a long strip structure, such as... Figure 3 As shown, especially the rectangular structure. In the prior art, the process of opening a bag on the fabric using existing bag opening equipment usually includes the following steps: (1) Determining the area on the fabric where the bag opening needs to be sewn, such as Figure 1 As shown; (2) Using a cutting device, cut seams in the bag opening area to fit the required bag opening, and form bag edge pieces by sewing them on the four sides of the bag opening, as shown. Figure 2 As shown; (3) Insert the folding device that fits the required bag opening into the bag opening area. Through the cooperation of the folding device and the pressing frame device, each bag edge piece is folded to the inside of the bag opening to form a folded edge, and at the same time, the required bag opening shape is formed, such as Figure 3 As shown; (4) Sew the folded edge directly using a sewing device according to actual needs, or first place a bag lip, zipper, or piece of fabric at the bag opening and then sew the folded edge using a sewing device to complete the bag opening work.

[0004] Existing technologies disclose several bag-opening machines, such as the bag-opening machine for garment bag opening processing disclosed in Chinese Patent CN 111575926 A, the continuous production garment bag-opening machine disclosed in Chinese Patent CN 112430916 A, and the bag-opening machine and processing technology for secondary sewing of pockets disclosed in Chinese Patent CN 113622101 B. These machines can complete the bag-opening work more conveniently and efficiently. However, existing bag-opening machines are only suitable for bag openings of fixed lengths. When the size of the bag opening changes, it is necessary to replace the folding device and pressing frame device to adapt to it. This not only results in poor versatility of existing bag-opening equipment, which can only meet the opening needs of specific sizes, but also requires configuring multiple folding devices of different sizes for the bag-opening equipment to meet the opening needs of more specific sizes. In addition, manual disassembly and replacement are required, resulting in higher costs and more troublesome use, which urgently needs to be solved. Summary of the Invention

[0005] The first aspect of this invention addresses the problem that existing bag-opening machines cannot meet the needs of opening bags of different sizes. It provides a novel folding device that can meet the opening requirements of bags with different widths, significantly improving versatility and making the process simpler and more convenient. The main concept is as follows:

[0006] A bag opening machine includes a frame, a folding device connected to the frame, folding structures on both sides of the folding device along the X direction, a Y-direction driving device including a Y-direction power, and a folding frame pressing device. The folding frame pressing device includes a movable frame, a Y-direction folding unit, and a pressing mechanism for constraining the fabric. The movable frame is connected to the frame and forms a sliding pair with the frame along the Y direction. The Y-direction folding unit is disposed on the movable frame and includes two folding forming modules adapted to the folding structures. The two folding forming modules are arranged opposite to each other, and a gap is formed between the two folding forming modules for the insertion of the folding device. The Y-direction power is drivenly connected to the movable frame. The position of the folding frame pressing device along the Y direction is adjusted by the Y-direction power so that the folding forming modules and the corresponding folding structures form a folding fit, thereby realizing the folding of the bag opening on both sides along the X direction. In this solution, by configuring the hemming and pressing device as a sliding pair with the frame along the Y direction, the hemming and pressing device as a whole has the freedom to move relative to the hemming device along the Y direction, thus solving the problem of adjustable relative positions of the hemming and pressing device and the hemming device along the Y direction. By configuring a pressing mechanism in the hemming and pressing device, the fabric can be constrained, allowing the fabric to move synchronously with the hemming and pressing device. By configuring Y-direction power in the Y-direction drive device and connecting the Y-direction power to the movable frame of the hemming forming module, the position of the hemming and pressing device along the Y direction can be precisely adjusted using the Y-direction power, and automatic adjustment can be achieved. By setting hemming structures on both sides of the hemming device along the X direction, and configuring a Y-direction hemming unit in the hemming and pressing device, and configuring a hemming forming module adapted to the hemming structure in the Y-direction hemming unit, the hemming forming module can form a hemming fit with the hemming structure. Through the cooperation of the two, the hemming and pressing device together complete the hemming of the bag opening. The folding operation is performed on one side in the X direction. By configuring two folding forming modules in the Y-direction folding unit, the two folding forming modules are arranged opposite each other, and a gap is formed between the two folding forming modules for the folding device to be inserted. During folding, the folding device can be inserted into the gap, so that the folding structures on both sides of the folding device correspond to the two folding forming modules respectively. Thus, the relative position between the folding forming modules and the corresponding side folding structures can be adjusted by Y-direction power, so that the two folding forming modules can successively form folds with the corresponding side folding structures. This not only realizes folding on both sides of the bag opening along the X direction, but also is applicable to bag openings of different widths, meeting the folding requirements of bag openings of different widths. This not only significantly improves versatility, but also eliminates the need to configure multiple folding devices of different sizes for the bag opening machine when the size of the bag opening changes, and also eliminates the need to disassemble and replace the folding devices. This is beneficial for saving costs, making it more convenient to use, and is more conducive to achieving fully automatic bag opening.

[0007] Preferably, the folding device is configured to be able to move up and down in the Z direction and / or the folding and pressing frame device is configured to be able to move up and down in the Z direction.

[0008] A second aspect of this invention addresses the problem of improving folding efficiency and adapting to folding requirements for bag openings of different widths. Further, the Y-direction folding unit includes a Y-direction adjustment module, which is mounted on the movable frame. The Y-direction adjustment module includes a Y-direction adjustment power source and a Y-direction moving mechanism. The Y-direction adjustment power source is drive-connected to the Y-direction moving mechanism, which is drive-connected to the folding forming module. The Y-direction adjustment power source adjusts the distance between the two folding forming modules along the Y direction. This distance adapts to the width of the bag opening. In use, simply adjusting the distance between the two folding forming modules along the Y direction via the Y-direction adjustment module automatically adapts to bag openings of different widths, thereby facilitating more efficient and faster folding operations.

[0009] Furthermore, the two hemming modules are synchronously moved in opposite directions along the Y-axis by adjusting the power in the Y direction. This not only allows for rapid adjustment of the distance between the two hemming modules to accommodate bag openings of different widths, but also enables simultaneous adjustment of the distance between the two hemming modules and the hemming device. The identical and synchronously adjustable distances facilitate adjusting the position of the hemming modules to match the corresponding hemming device, simplifying control and the hemming process, and improving fitting accuracy.

[0010] A third aspect of this invention addresses the problem of improving the stability and reliability of adjustment. Preferably, the Y-axis adjustment module includes two Y-axis moving mechanisms arranged parallel to each other along the Y-direction. These two mechanisms are respectively positioned on both sides of the hem-forming module, and the two ends of the hem-forming module are connected to the two Y-axis moving mechanisms. By configuring two Y-axis moving mechanisms and connecting the two ends of the hem-forming module to them, not only can the two Y-axis moving mechanisms support the two ends of the hem-forming module respectively, allowing them to move synchronously and ensuring the hem-forming module moves strictly along the Y-direction, but they can also drive the two hem-forming modules to move synchronously in opposite directions along the Y-direction, thereby effectively improving the stability and reliability of the hem-forming module's movement.

[0011] To improve synchronization, preferably, the Y-axis adjustment module also includes a drive shaft arranged along the X-axis. The two Y-axis moving mechanisms are belt drive mechanisms, each including a driving pulley, a driven pulley, and a drive belt. The two driving pulleys are connected to the drive shaft, and the two driven pulleys are rotatably mounted on the movable frame. The drive belt is tensioned between the driving pulley and the driven pulley. One end of the folding edge forming module is connected to the upper side of the two drive belts, and the other end of the folding edge forming module is connected to the lower side of the two drive belts. The Y-axis adjustment power is connected to the drive shaft to drive the drive shaft to rotate. The Y-axis adjustment power simultaneously drives the transmission shaft to connect two belt drive mechanisms, which improves the synchronization of the two belt drive mechanisms. This, in turn, improves the synchronization of the two hem forming modules. Furthermore, by connecting the two ends of one hem forming module to the upper side of the two transmission belts and the two ends of the other hem forming module to the lower side of the two transmission belts, the forward and reverse rotation of the transmission shaft driven by the Y-axis adjustment power can control the two hem forming modules to move closer or further apart. This allows the hem forming modules to be adjusted to the appropriate position for the bag opening width, thus solving the problem of adapting to bag openings of different widths.

[0012] A fourth aspect of this invention addresses the problem of adapting to bag openings of different widths and improving the folding effect. Further, the folding forming module includes a base, a pull-out mechanism, and an upper pressing mechanism, wherein the base is drive-connected to the Y-axis moving mechanism.

[0013] The pressing mechanism includes a pressing component and a pressing power source disposed on the base, the pressing power source being driven and connected to the pressing component.

[0014] The pull-out mechanism includes a pull-out component and a pull-out power source connected to the base. The pull-out component is movably arranged along the Y direction, and the pull-out power source is connected to the pull-out component. The pull-out component is located between the lower pressing mechanism and the upper pressing mechanism, and the fabric is clamped by the cooperation of the lower pressing mechanism and the pull-out component.

[0015] The pulling force drives the pulling component to move towards the folding device to position one, pressing the corresponding side of the bag edge against the folding structure, causing the bag edge to bend. The pressing force drives the pressing component to press the bent bag edge tightly. The pulling force also drives the pulling component to move away from the folding device to position two, causing the pulling component to exit the folding structure. By configuring a pulling mechanism in the folding forming module, and configuring a pulling force and a pulling component connected to the pulling force in the pulling mechanism, the pulling mechanism can cooperate with the folding device to form a folding process. This not only creates a new folding process but also meets the folding requirements of fabrics of different thicknesses and bag openings of different sizes, ensuring better folding effects for fabrics of different thicknesses and bag openings of different sizes, and facilitating automated folding.

[0016] Preferably, the pulling force is a cylinder, one end of which is connected to the base and the other end to the pulling component. The cylinder extends and retracts along the Y direction. The base is constructed with a guide groove along the Y direction, and the side of the pulling component is movably constrained by the guide groove. The pressing force is a cylinder, one end of which is connected to the base and the other end to the pressing component. The cylinder extends and retracts along the Z direction to drive the pressing component to rise and fall vertically.

[0017] Furthermore, a guiding mechanism is also included, comprising a guiding part and a sliding part adapted to the guiding part. The sliding part is movably constrained by the guiding part. The guiding part is disposed along the Y direction on the movable frame, and the base is connected to the sliding part. This ensures that the folding forming module moves strictly along the Y direction, thereby improving accuracy.

[0018] A fifth aspect of this invention addresses the problem of meeting the folding requirements of the long sides of bag openings of different lengths. Further, the folding device includes a folding mold and a telescopic power source. The folding mold is connected to a frame, and folding structures are respectively constructed on both sides of the folding mold along the X direction. The telescopic power source is connected to the folding mold via a transmission mechanism, and adjusts the length of the folding mold by driving its extension and retraction along the X direction. By constructing folding structures on both sides of the folding mold along the X direction and making the folding mold extend and retractable in the X direction, and by connecting the telescopic power source to the folding mold, the extension and retraction of the folding mold can be controlled by the telescopic power source. The length of the folding mold can be adjusted by extending and retracting it along the X direction, ensuring that the length of the folding structure can meet the folding requirements of the two long sides of bag openings of different lengths.

[0019] Preferably, the folding mold includes a guide shaft, two end parts, and several intermediate parts. The two end parts are arranged opposite to each other, the guide shaft is arranged along the X direction, the guide shaft is fixed to one of the end parts, the other end part has a guide hole adapted to the guide shaft, the intermediate parts have a guide hole adapted to the guide shaft, the intermediate parts are disposed between the two end parts, at least two sides of the intermediate parts are respectively provided with the folding structure, the intermediate parts are movably sleeved on the guide shaft through the guide hole, and at least two adjacent intermediate parts are provided with an elastic part, the elastic part is sleeved on the guide shaft;

[0020] The folding device also includes a linkage mechanism, which comprises a rotating shaft and nuts. The rotating shaft includes an intermediate shaft section and lead screw sections connected to both ends of the intermediate shaft section. The threads of the two lead screw sections have opposite directions, and each lead screw section is threaded with a nut. The two nuts are respectively connected to two end components. The telescopic force is transmitted through the intermediate shaft section to drive the rotating shaft to rotate. When the two end components approach each other, the intermediate components are simultaneously driven to approach each other, and the elastic potential energy of the elastic component increases. When the two end components move away from each other, the intermediate components are simultaneously driven to move away from each other, and the elastic potential energy of the elastic component decreases. This not only allows the length of the folding mold and the side folding structure to be adjusted by the telescopic force to meet the folding requirements of the long side in bag openings of different lengths, but also allows for smaller gaps between adjacent folding structures. Each end component can be automatically and evenly distributed between the two end components, thus facilitating a better folding effect through the combination of various folding structures.

[0021] A bag-opening process using the aforementioned bag-opening machine includes: an automatic adjustment process, a cutting process, a primary folding process, and a secondary folding process. The automatic adjustment process includes: adjusting the spacing between two folding forming modules according to the required width of the bag opening, so that the spacing between the two folding forming modules matches the width of the bag opening. The cutting process includes: constraining the fabric to a folding frame device and using a laser cutting module to cut the required seam shape on the fabric. The primary folding process includes: aligning the folding device with the gap between the two folding forming modules in the folding frame device. The folding device and the folding forming module are moved relative to each other along the Z-direction so that the folding device is inserted into the fabric and the limiting surface of the folding structure is located below the fabric, with the positioning surface of the folding structure corresponding to the fabric. Based on the width of the bag opening, the folding frame device is driven to move along the Y-direction using Y-axis power, causing the folding forming module on one side of the folding frame device to approach the folding structure on the other side of the folding device and stop at a position adapted to the folding structure, thereby driving the bag edge piece on that side to bend. The pulling force in the folding forming module on that side is used to drive the pulling component to move towards the folding device to position one. The bag edge piece is pressed into the folding structure, causing the bag edge piece to bend. The pressing force in the folding module drives the pressing component to press the bent bag edge piece tightly. The pulling force in the folding module drives the pulling component to move to position two in a direction away from the folding device, causing the pulling component to exit the folding structure and completing the folding work on one side of the bag opening. The secondary folding process includes: based on the width of the bag opening, using Y-axis power to drive the folding frame device to move in the opposite direction along the Y-axis, causing the folding forming module on the other side of the folding frame device to move closer to the corresponding side of the folding device. The process involves folding a hem and positioning the bag edge piece at a suitable location to bend it. The pull-out mechanism in the hem forming module then moves a pull-out component towards the hem forming device to position one, pressing the bag edge piece into the hem forming structure, thus bending it. The pressing mechanism in the hem forming module then presses the bent bag edge piece firmly. Finally, the pull-out mechanism in the hem forming module moves the pull-out component away from the hem forming device to position two, causing it to exit the hem forming structure and completing the hem forming on the other side of the bag opening. This process can solve the problem of folding the two long sides of bags with different widths.

[0022] Furthermore, the automatic adjustment process also includes: adjusting the length of the folding die in the folding device according to the required bag opening length, so that the length of the folding die matches the length of the bag opening. This can solve the problem of folding bags with various sizes of long sides at the bag opening.

[0023] Furthermore, the first folding process also includes: driving the folding device to move upward along the Z direction relative to the folding forming module, and using the limiting surface of the folding device to press the bent bag edge piece against the lower surface of the pull-out component;

[0024] The secondary folding process further includes: driving the folding device to move upward along the Z direction relative to the folding forming module, and using the limiting surface of the folding device to press the bent pocket edge piece tightly against the lower surface of the pull-out component. This not only achieves a better folding effect but is also suitable for fabrics of different thicknesses, eliminating the adverse effects of fabric thickness on the folding effect.

[0025] Compared with the prior art, the bag opening machine and bag opening process provided by the present invention can be applied to bag openings of different widths and can meet the folding requirements of bag openings of different widths. It can not only significantly improve versatility, but also save costs, make it more convenient to use, and make it more conducive to achieving fully automatic bag opening. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a partial top view of the fabric.

[0028] Figure 2 The fabric after laser cutting.

[0029] Figure 3 The fabric after the pocket edge piece is folded inward to form the pocket opening.

[0030] Figure 4 This is a front view of a folding device in a bag-opening machine provided in Embodiment 1 of the present invention.

[0031] Figure 5 for Figure 4 The right view.

[0032] Figure 6 This is one of the partial schematic diagrams of a bag-opening machine provided in Embodiment 1 of the present invention.

[0033] Figure 7 This is a second partial schematic diagram of a bag-opening machine provided in Embodiment 1 of the present invention.

[0034] Figure 8 This is a schematic diagram of the structure of a Y-direction folding unit in a bag-opening machine provided in Embodiment 1 of the present invention.

[0035] Figure 9 This is a schematic diagram of a pressing mechanism in a bag-opening machine provided in Embodiment 1 of the present invention.

[0036] Figure 10 This is a schematic diagram of another pressing mechanism in a bag-opening machine provided in Embodiment 1 of the present invention.

[0037] Figure 11 This is a partial structural diagram of a bag-opening machine provided in Embodiment 1 of the present invention.

[0038] Figure 12 for Figure 11 Sectional view at point AA.

[0039] Figure 13 This is a schematic diagram showing the folding device aligned with the bag opening area during the bag opening process.

[0040] Figure 14 This is a schematic diagram showing the lower end of the folding device inserted into the bag opening area during the bag opening process. The dotted line in the diagram represents the moving direction of the folding and pressing frame device.

[0041] Figure 15 This is a diagram showing the side of the bag bending during the opening process.

[0042] Figure 16 This is a diagram illustrating the process of opening the bag, where the pull plate extends and the bag side panel rests against the positioning surface.

[0043] Figure 17 This is a schematic diagram showing the folding device moving upwards and pressing the bag edge piece during the bag opening process.

[0044] Figure 18 This is a schematic diagram showing the upper pressing component clamping the bag edge piece during the bag opening process.

[0045] Figure 19 This is a schematic diagram showing the pull plate moving in the opposite direction and exiting the folding device during the bag opening process.

[0046] Figure 20 This is a schematic diagram showing the folding device moving downwards after one side is folded during the bag opening process. The dotted line in the diagram represents the moving direction of the folding and pressing frame device.

[0047] Figure 21 This is a diagram showing the side of the bag bending during the opening process.

[0048] Figure 22 This is a diagram illustrating the process of opening the bag, where the pull plate extends and the bag side panel rests against the positioning surface.

[0049] Figure 23 This is a schematic diagram showing the folding device moving upwards and pressing the bag edge piece during the bag opening process.

[0050] Figure 24 This is a schematic diagram showing the upper pressing component clamping the bag edge piece during the bag opening process.

[0051] Figure 25 This is a schematic diagram showing the pull plate moving in the opposite direction and exiting the folding device during the bag opening process.

[0052] Figure 26 This is a schematic diagram showing the folding and pressing device moving to the middle position after the two sides are folded during the bag opening process.

[0053] Figure 27 This is a schematic diagram of the structure of a Y-direction folding unit in a bag-opening machine provided in Embodiment 2 of the present invention.

[0054] Figure 28 This is a schematic diagram of a folding device in a bag-opening machine provided in Embodiment 3 of the present invention.

[0055] Figure 29 for Figure 28 The right view.

[0056] Figure 30 This is a schematic diagram of the structure of an intermediate component in a folding device provided in Embodiment 3 of the present invention.

[0057] Figure 31 for Figure 28 The front view shows the minimum length of the folding device.

[0058] Figure 32 for Figure 28 The front view shows an increase in the length of the folding device.

[0059] Figure 33 This is a partial structural diagram of a bag-opening machine provided in Embodiment 3 of the present invention.

[0060] Explanation of markings in the diagram: Fabric 1, Bag opening 11, Bag opening area 12, Seal 13, Bag edge piece 14, Long side 15, Wide side 16; Frame 2, Workbench 21, First power unit 22, First connecting frame 23, Second power unit 24, Second connecting frame 25, Linear guide rail 26; Folding and pressing device 3, Movable frame 31, Y-axis folding unit 32, Folding forming module 33; Y-axis power unit 41, Y-axis transmission mechanism 42; Base 51, Guide groove 511, Guide hole 512, Pull-out power unit 521, Pull-out component 522, Pressing power unit 531, Pressing component 532, Guide rod 533; Y-axis adjusting power unit 61, Belt drive mechanism 62, Transmission... Driven shaft 63, Y-axis moving mechanism 64, driving pulley 641, driven pulley 642, transmission belt 643; Folding device 7, bracket 71, folding mold 72, folding structure 73, positioning surface 731, hook 732, limiting surface 733, Z-axis power 74, Z-axis transmission mechanism 75; Telescopic power 81, end component 82, guide shaft 83, intermediate component 84, through hole 85, elastic component 86, rotating shaft 87, intermediate shaft section 871, lead screw section 872, nut 873; Pressing mechanism 9, pressing plate 91, center insertion port 911, threaded hole 912, movable pressure plate 92, strip hole 921, fastener 93, pressing cylinder 94. Detailed Implementation

[0061] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0062] Example 1

[0063] This embodiment provides a bag-opening machine, including a frame, a folding device, a Y-axis drive device, and a folding and pressing frame device. The frame primarily serves a load-bearing function and is equipped with a worktable for bag-opening operations. Figure 11 As shown, for ease of description, in this embodiment, the height direction of the frame is taken as the Z direction, the length direction of the worktable as the X direction, and the width direction of the worktable as the Y direction. The X, Y, and Z directions are perpendicular to each other. Figure 11 As shown.

[0064] The folding device can be connected to the frame so that the frame can support the folding device. For example, the folding device can be fixedly connected to the frame, such as... Figure 11 As shown, in implementation, the folding device can be preferentially suspended from the frame, so that the lower end of the folding device can cooperate with the folding and pressing frame device below. In this embodiment, the folding device has folding structures on both sides along the X direction. In implementation, the folding structure is hook-shaped, as shown... Figure 4 and Figure 5 As shown, this is to form a folding fit with the corresponding folding and pressing frame device. In implementation, the folding structure may include a positioning surface and a hook protruding from the positioning surface. The hook has a limiting surface for restricting the bag edge piece, so that the positioning surface and the limiting surface can form a hook shape. In implementation, the folding device has various embodiments. For example, the folding device may include a bracket and two folding molds symmetrically connected to the bracket. The bracket is connected to the frame. The two folding molds are each constructed as an L-shaped structure, with the two inner surfaces of the L-shaped structure being the positioning surface and the limiting surface, respectively. Figure 4 and Figure 5 As shown, a hook-shaped folding structure can be formed using the positioning surface and the limiting surface; that is, the folding structure can be constructed on the folding die. For example, the folding device may include a bracket and a folding die connected to the bracket. The bracket is connected to the frame, and the folding die is constructed as an inverted T-shaped structure. The two sides of the inverted T-shaped structure are the positioning surface and the limiting surface, respectively. Figure 4 and Figure 5 As shown, this allows for the formation of a hook-shaped folded edge structure using the positioning surface and the limiting surface.

[0065] In this embodiment, the Y-axis driving device includes a Y-axis power source, which can be a stepper motor, servo motor, etc. In this embodiment, the hemming and pressing device includes a movable frame, a Y-axis hemming unit, and a pressing mechanism for constraining the fabric. The movable frame is movably connected to the machine frame and forms a sliding pair with the machine frame along the Y direction, allowing the hemming and pressing device as a whole to have a degree of freedom of movement relative to the hemming device along the Y direction. This makes the relative position of the hemming and pressing device and the hemming device along the Y direction adjustable and can achieve automatic adjustment. The pressing mechanism configured in the hemming and pressing device can constrain the fabric, causing the fabric to move synchronously with the hemming and pressing device.

[0066] like Figures 6-8As shown, in this embodiment, the Y-direction folding unit is disposed on the movable frame. The Y-direction folding unit includes two folding forming modules adapted to the folding structure. The two folding forming modules are arranged opposite to each other, and a gap is formed between the two folding forming modules for the insertion of the folding device. This allows the folding device to be inserted into the gap during folding, so that the folding structures on both sides of the folding device correspond to the two folding forming modules respectively. At the same time, the Y-direction power is connected to the movable frame for transmission, so that the movable frame can be driven to move along the Y direction using the Y-direction power. This allows the position of the folding pressing frame device along the Y direction to be adjusted by the Y-direction power, so that the folding forming module and the corresponding folding structure can form a folding fit. Through the mutual cooperation of the two, the folding work of the bag opening along one side of the X direction is completed, and finally the folding of the bag opening along both sides of the X direction (usually the long side of the bag opening, which will not be described in detail below) is achieved. Specifically, during use, the relative position between the folding forming module and the corresponding side folding structure can be adjusted by Y-axis power adjustment, so that the two folding forming modules can successively cooperate with the corresponding side folding structure to form folds. This not only realizes folding on both sides of the bag opening along the X direction, but also applies to bag openings of different widths, meeting the folding requirements of bag openings of different widths. This not only significantly improves versatility, but also eliminates the need to configure multiple folding devices of different sizes for the bag opening machine when the size of the bag opening changes, nor does it require disassembly and replacement of the folding devices. This helps to save costs, makes it more convenient to use, and is more conducive to achieving fully automatic bag opening.

[0067] In a more specific embodiment, the Y-axis drive device further includes a Y-axis transmission mechanism. The Y-axis power can be transmitted to the movable frame via the Y-axis transmission mechanism, so as to drive the movable frame to move strictly along the Y direction using the Y-axis power. In implementation, the Y-axis transmission mechanism can be a belt drive mechanism, a gear-rack drive mechanism, or a lead screw-nut drive mechanism, etc.

[0068] In practice, the folding and pressing device may only have a degree of freedom to move relative to the frame along the Y direction. However, in a more refined embodiment, the folding and pressing device may also have degrees of freedom to move relative to the frame along the X and Z directions. In this case, such as Figure 6As shown, the bag opening machine also includes a first connecting frame, a first power source, a second connecting frame, and a second power source. The first connecting frame is movably connected to the machine frame and forms a sliding pair with the machine frame in the X direction. The first power source is located on the machine frame and is driven by the first connecting frame to drive the first connecting frame to move in the X direction. The second connecting frame is movably connected to the first connecting frame and forms a sliding pair with the first connecting frame in the Z direction. The second power source can be located on the first connecting frame and is driven by the second connecting frame to drive the second connecting frame to move in the Z direction. The movable frame is movably connected to the second connecting frame and forms a sliding pair with the second connecting frame in the Y direction, thereby enabling the folding and pressing frame device to have degrees of freedom of movement relative to the machine frame in the X, Y, and Z directions. As an example, when a belt drive mechanism is used in the Y-direction transmission mechanism, the belt drive mechanism includes a driving pulley, a driven pulley, and a transmission belt tensioned between the driving pulley and the driven pulley. The driving pulley and the driven pulley are rotatably connected to a second connecting frame. The transmission belt is arranged along the Y-direction, and the Y-direction power is transmitted to the driving pulley. Figures 6-8 As shown, the movable frame is connected to the second support via linear guides arranged along the Y direction and is connected to a transmission belt, allowing Y-direction power to drive the movable frame to move linearly along the Y direction via a belt transmission mechanism. As another example, when a screw-nut transmission mechanism is used for the Y-direction transmission, the screw-nut transmission mechanism includes a screw and a nut adapted to the screw. The screw is rotatably mounted on the second connecting frame and arranged along the Y direction. Y-direction power is transmitted through the screw, and the nut is fitted onto the screw. The movable frame is connected to the second support via linear guides arranged along the Y direction and is connected to the nut, allowing Y-direction power to drive the movable frame to move linearly along the Y direction via the screw-nut transmission mechanism.

[0069] To allow the lower end of the folding device to be inserted into the folding and pressing frame device, in one embodiment, the bracket of the folding device can be fixedly installed on the frame, and the folding and pressing frame device can be vertically raised and lowered using a second power source, so that the lower end of the folding device can be inserted into the folding and pressing frame device. For example... Figure 4 and Figure 5 As shown, in another embodiment, the bracket of the folding device is movably connected to the frame in the Z direction. For example, the bracket can be connected to the frame through a guiding mechanism such as a linear guide rail arranged in the Z direction. At the same time, the folding device also includes a Z-direction power. The Z-direction power can be rotatably connected to the bracket through a Z-direction transmission mechanism such as a screw-nut mechanism, a belt drive mechanism, or a gear-rack drive mechanism, so as to drive the bracket in the vertical direction, thereby effectively changing the position of the folding device, so that the lower end of the folding device can be inserted into the folding pressing frame device or detached from the folding pressing frame device.

[0070] In a more specific embodiment, the aforementioned movable connections can preferably be implemented using a guiding mechanism. The guiding mechanism may include a guiding part and a sliding part adapted to the guiding part. The sliding part is movably constrained by the guiding part, and the guiding part guides the linear movement of the sliding part. In implementation, the guiding mechanism can preferably use a linear guide rail, which includes a guide rail as the guiding part and a slider as the sliding part. For example, the movable frame can be connected to the second connecting frame via a linear guide rail arranged along the Y direction, the second connecting frame can be connected to the first connecting frame via a linear guide rail arranged along the Z direction, and the first connecting frame can be connected to the frame via a linear guide rail arranged along the X direction, and so on. Figure 6 As shown.

[0071] In this embodiment, the pressing mechanism can be installed on the movable frame. In implementation, the pressing mechanism uses an existing fabric pressing mechanism to constrain the fabric to be processed. For example, in this embodiment, the pressing mechanism includes a pressing plate with a central insertion port for the hemming device to pass through, so as to press down the fabric using the pressing plate. The bag opening area corresponds to the central insertion port to allow for bag opening operations within the central insertion port. In implementation, the central insertion port can preferably be square. In a further embodiment, the pressing mechanism also includes four movable pressing plates, each of which can be fixed to one side of the central insertion port by fasteners, such as... Figure 9 and Figure 10 As shown, four movable pressure plates can form a smaller insertion opening. The folding device can be inserted into the central insertion opening through these openings. The four movable pressure plates are used to assist in pressing the fabric downwards, typically utilizing the elasticity of the pressure plates themselves. Furthermore, only one movable pressure plate can be adjusted along the X or Y direction, allowing the position of each pressure plate to be adjusted according to the size of the bag opening to better meet the opening requirements of bags of different sizes. In implementation, as... Figure 10 As shown, the lower pressure plate has threaded holes, and the movable pressure plate has slotted holes along the X or Y direction. Fasteners that fit the threaded holes pass through the slotted holes and are threaded into the threaded holes, which not only fixes the movable pressure plate to the lower pressure plate but also facilitates adjustment of the movable pressure plate's position. As shown in the figure, in this embodiment, the lower pressure plate is connected to the movable frame via vertically arranged linear guides, and the lower pressure plate is driven by a lower pressure cylinder vertically arranged on the movable frame. Figure 10 and Figure 11 As shown, this is so that the lower pressure plate can be driven to rise and fall in the Z direction by a cylinder.

[0072] In a more specific embodiment, the folding forming module includes a base, a pull-out mechanism, and an upper pressing mechanism, wherein the base can be fixed to a movable frame, such as... Figure 8 , Figure 11 and Figure 12As shown; the pressing mechanism includes a pressing component and a pressing power source disposed on the base. The pressing power source is drive-connected to the pressing component so that the pressing component is driven to press the bent bag edge sheet upward using the pressing power source. Figure 8 , Figure 11 and Figure 12 As shown, the pull-out mechanism includes a pull-out component and a pull-out power source connected to the base. The pull-out component is movable along the Y-direction to provide freedom of movement in that direction. The pull-out power source is connected to the pull-out component so that it can be driven to move along the Y-direction. During assembly, the pull-out component can be positioned between the lower pressing mechanism and the upper pressing mechanism, as shown... Figure 8 , Figure 11 and Figure 12 As shown, the fabric is clamped by the cooperation of the pressing mechanism and the pull-out component, thus achieving the purpose of restraining the fabric. During the opening process, the pulling force can drive the pull-out component to move towards the folding device (or center insert) to position one, so that it can form a folding engagement with the folding structure on the side of the folding device at position one, and press the corresponding side of the bag edge piece against the folding structure, causing the bag edge piece to bend, as shown. Figure 15 As shown; then, the upward pressure can drive the upward pressing component to press the bent bag edge piece, as shown. Figure 16 As shown, this allows for subsequent sewing or other operations. At this point, the pulling force can also drive the pulling component to move to position two in a direction away from the folding device (or center insert). During this process, the pulling component gradually moves away from the positioning surface of the folding structure, allowing it to gradually exit the folding structure. At position two, the pulling component can be completely exited from the limiting surface of the folding structure, facilitating subsequent sewing along the edge of the bag opening. It can be understood that position two can be the initial position of the pulling component. In a preferred embodiment, at position two, the end of the pulling component can be flush with the end of the upper pressing component, making folding easier. Of course, it can also be understood that at position two, the end of the pulling component may not be flush with the end of the upper pressing component.

[0073] During implementation, the pulling force can preferably be generated using a cylinder, such as... Figure 8 , Figure 11 and Figure 12 As shown, one end of the cylinder can be connected to the base, and the other end to the pull-out component. The cylinder is arranged along the Y-direction, allowing it to extend and retract in that direction. This extension and retraction adjusts the position of the pull-out component along the Y-direction. To improve the accuracy of the pull-out component's movement and make the structure more compact and smaller, the base is constructed with a guide groove along the Y-direction. The side of the pull-out component is movably constrained by the guide groove, allowing it to be guided. Furthermore, the pulling force can also be provided by an electric actuator or a hydraulic cylinder, which will not be elaborated upon here.

[0074] Similarly, in implementation, the pressing power can preferably be a cylinder. One end of the cylinder is connected to the base, and the other end is connected to the pressing component. The cylinder extends and retracts in the Z direction to drive the pressing component to rise and fall vertically. When the pressing component is at its lowest position, it does not affect the folding action above; when the pressing component rises, it can press the bent bag edge against the pull-out component and / or the pressing mechanism. To ensure the strict vertical rising and falling of the pressing component, in implementation, the folding forming module also includes a guide hole constructed in the base and a guide rod adapted to the guide hole, such as... Figure 8 , Figure 11 and Figure 12 As shown, the guide rod is vertically mounted on the upper pressing component and connected to the upper pressing power. The base is sleeved on the guide rod through the guide hole, so that the vertical movement of the upper pressing component is guided by the cooperation between the guide rod and the guide hole. In addition, in implementation, the pulling power can also be an electric actuator or a hydraulic cylinder, and the upper pressing mechanism can also use the lever principle to press or release the bag side piece. Examples will not be given here.

[0075] To improve stability and accuracy, the folding forming module may include two bases during implementation, such as... Figure 8 , Figure 11 and Figure 12 As shown, two bases can be symmetrically arranged on both sides along the Y direction. The two bases are respectively equipped with an upward pressing force and a pulling force. The two upward pressing forces act synchronously to jointly drive the upward pressing component to move vertically and vertically more smoothly, which can better meet the folding requirements of bag openings of different lengths. The two pulling forces also act synchronously to jointly drive the pulling component to move more smoothly along the Y direction, so that the two ends of the pulling component keep their movements completely consistent, which can better meet the folding requirements of bag openings of different lengths.

[0076] In a more complete solution, this bag-opening machine is also equipped with a control module. Each of the aforementioned power sources is electrically connected to the control module, allowing for precise control of each power source. In another complete solution, the bag-opening machine is further equipped with a laser cutting module and a sewing module. The laser cutting module is mounted on the frame and is used to cut the fabric to form a seam in the bag opening area. The two ends of the seam are typically Y-shaped, as shown in the figure. The sewing module is used for sewing. Furthermore, it can be understood that the folding device and folding forming module arranged along the Y direction are not only suitable for folding the bag opening along both sides of the X direction (i.e., the long side of the bag opening), but in other embodiments, if the folding device and folding forming module are arranged along the X direction, they can also be used for folding the bag opening along both sides of the Y direction (i.e., the wide side of the bag opening). Of course, in practice, two sets of the aforementioned folding device and folding forming module can be arranged along the X and Y directions to meet the folding requirements of bag openings of different sizes.

[0077] When using this bag opening machine, the following processes can be included: automatic adjustment process, cutting process, first folding process and second folding process, wherein the automatic adjustment process includes: adjusting the distance between the two folding forming modules according to the required width of the bag opening, so that the distance between the two folding forming modules is adapted to the width of the bag opening.

[0078] The cutting process may include: first laying the fabric (or cloth) flat on the hemming and pressing frame device, and then pressing the fabric down using a pressing mechanism, such as... Figure 13 As shown, the planned pocket opening area on the fabric is located within the central opening. Then, the hem forming module is moved along the X direction to the position corresponding to the laser cutting module. The laser cutting module then cuts out the desired seam shape on the fabric (this step is unnecessary if the hem forming module is initially positioned to correspond to the laser cutting module). Figure 13 As shown.

[0079] The folding process includes: S1, moving the folding module along the X direction to the position of the matching folding device, so that the lower end of the folding device is directly facing the bag opening area below, such as... Figure 13 As shown, the folding device corresponds to the gap between the two folding forming modules in the folding and pressing frame device.

[0080] S2, causing the folding device and the folding forming module to move relative to each other along the Z direction. For example, the folding device can be driven to move vertically relative to the folding forming module, allowing the folding device to be inserted into the pocket opening area of ​​the fabric. Figure 14 As shown, the limiting surface of the hem structure is located below the fabric (i.e., there is a gap between the limiting surface and the lower surface of the fabric), and the positioning surface of the hem structure corresponds to the fabric and the pull-out component.

[0081] S3, based on the width of the bag opening, uses Y-axis power to drive the folding and pressing frame device to move along the Y-axis, such as... Figure 14 As shown by the dashed line, the folding forming module on one side of the folding and pressing device is brought close to the folding structure on the other side of the folding device and stopped at the position that adapts to the folding structure. During this process, the corresponding bag edge piece is inserted into the folding structure and undergoes a certain degree of bending under the guidance of the folding structure, such as... Figure 15 As shown, at this time, the hem forming module is located outside the bag edge piece and outside the bag opening area. That is, the ends of the pull-out component and the pressing component in the hem forming module are outside the bag opening area, as shown in the figure.

[0082] S4, using the pulling force in the side folding forming module, the pulling component is moved towards position one in the direction of the folding device, pressing the bag edge piece into the folding structure, so that the bag edge piece forms a bend, as shown. Figure 16As shown; in the preferred embodiment, at one position, the end of the pull-out component abuts against the edge piece of the fabric to press the edge piece against the positioning surface of the folding device. This allows for folding of bag openings of different widths and can also adapt to fabrics of different thicknesses, enabling folding of fabrics of different thicknesses smoothly and achieving better folding results. This effectively solves the problem that existing folding methods cannot meet the better folding requirements of fabrics of different thicknesses.

[0083] S5, the folding device moves upward along the Z direction relative to the folding forming module, using the limiting surface of the folding device to press the bent bag edge piece against the lower surface of the pull-out component, such as... Figure 17 As shown, this is to better meet the needs of precise hemming for fabrics of different thicknesses. It can be understood that, in practice, when the spacing in step S2 is equal to or slightly less than the sum of the thickness of the pocket edge piece and the thickness of the pull-out component, this step can be omitted. When the spacing is greater than the sum of the thickness of the pocket edge piece and the thickness of the pull-out component, this step not only achieves a better hemming effect but is also applicable to fabrics of different thicknesses. It can be understood that, to meet the hemming needs of fabrics of different thicknesses and improve the hemming effect, in practice, the spacing can be preferentially controlled to be greater than the sum of the thickness of the pocket edge piece and the thickness of the pull-out component, and then this step can be used to press the pocket edge pieces of different thicknesses together, which is very convenient and efficient.

[0084] S6, the pressing force in the folding forming module drives the pressing component to move upward, such as... Figure 18 As shown, this is done to press and tighten the bent bag edge piece to fix it in place and maintain the folded edge for subsequent sewing.

[0085] S7, using the pulling force in the folding forming module, the pulling component is moved to position two in the direction away from the folding device, causing the pulling component to exit the folding structure, such as... Figure 19 As shown, the distance the pull-out component can retract can be determined according to actual needs, as long as it does not affect the subsequent sewing at the bag opening. For example, the pull-out component can be moved to a position flush with the end of the upper pressing component. It can be understood that position two can also be the initial position of the pull-out component, thereby completing the folding work on the long side of the bag opening.

[0086] The secondary folding process includes: F1, if step S5 exists, this step drives the folding device to move downwards in the Z direction relative to the folding forming module to detach from the bag edge piece, as shown. Figure 20 As shown, the device is preferentially moved to the position of step S2, so that the distance between the limiting surface and the lower surface of the fabric is equal to the distance in step S2; if step S5 does not exist, this step can also be omitted.

[0087] F2, based on the width of the bag opening, uses Y-axis power to drive the folding and pressing frame device to move in the opposite direction along the Y-axis, such as... Figure 20 As shown by the dotted line, the folding forming module on the other side of the folding and pressing device is brought close to the folding structure on the corresponding side of the folding device and stopped at a position that fits the folding structure; during this process, the bag edge piece on the corresponding side is engaged with the folding structure and undergoes a certain degree of bending under the guidance of the folding structure, such as... Figure 21 As shown; at this point, the other side of the bag opening, which has already been folded, is located away from the folding device.

[0088] Repeat steps S4-S9 to complete the folding of the other long side of the bag opening, as follows: Figures 22-25 As shown.

[0089] F3. Using Y-axis power to drive the folding and pressing frame device to move along the Y-axis, so that the folding device moves relative to the folding forming module to the middle position of the two folding forming modules, such as... Figure 26 As shown, the folding device is then driven to move upwards along the Z-direction relative to the folding forming module, causing the folding device to separate from the folding forming module, thus smoothly completing the folding of the long side of the bag opening of different widths. Of course, it is understood that the folding device can also retract at other positions, which will not be elaborated here.

[0090] Example 2

[0091] To further address the issues of improving folding efficiency and adapting to folding requirements for bag openings of different widths, the main difference between this embodiment and the previous embodiment is that the bag opening machine provided in this embodiment further includes a Y-axis adjustment module in the Y-axis folding unit. This Y-axis adjustment module is located on the movable frame, as shown below. Figure 27 As shown, the Y-axis adjustment module includes a Y-axis adjustment power source and a Y-axis moving mechanism. The Y-axis adjustment power source is connected to the Y-axis moving mechanism, which is connected to the hem forming module. Thus, the distance W between the two hem forming modules along the Y direction can be adjusted by the Y-axis adjustment power source, so that the distance W can be used to adapt to the width of different bag openings. In use, simply adjusting the distance W between the two hem forming modules along the Y direction by the Y-axis adjustment module will automatically adapt to bag openings of different widths, thereby facilitating more efficient and faster hem forming.

[0092] That is, in this embodiment, the hemming module is not fixedly mounted on the movable frame, but is movably mounted on it. In implementation, a Y-axis adjustment module can be configured for one of the hemming modules to adjust its position along the Y direction, thereby effectively adjusting the distance W between the two hemming modules. Alternatively, each of the two hemming modules can be configured with an independent Y-axis adjustment module, with each module connected to the other for driving adjustment. As an example, the Y-axis adjustment power in the Y-axis adjustment module can preferably be a stepper motor or a servo motor; the Y-axis movement mechanism in the Y-axis adjustment module can be a belt drive mechanism, a gear-rack drive mechanism, or a lead screw-nut drive mechanism, etc. The base of the hemming module can be connected to the movable frame via a linear guide rail. The Y-axis adjustment power is driven by the Y-axis movement mechanism, which is in turn driven by the base, allowing the Y-axis adjustment power to move precisely along the Y direction.

[0093] In a preferred embodiment, the two hemming modules can be synchronously moved in opposite directions along the Y direction by adjusting the power in the Y direction. This not only allows for rapid adjustment of the distance W between the two hemming modules, enabling them to adapt to bag openings of different widths, but also allows for synchronous adjustment of the distance between the two hemming modules and the hemming device. The fact that the distances are the same and can be adjusted synchronously makes it easier to adjust the position of the hemming modules to match the hemming device on the corresponding side, which simplifies control and the hemming process and improves the matching accuracy.

[0094] To improve adjustment stability and reliability, in a more preferred embodiment, the Y-axis adjustment module may include two Y-axis moving mechanisms arranged parallel to each other along the Y-direction, such as... Figure 27 As shown, two Y-axis moving mechanisms are respectively arranged on both sides of the folding forming module, and the two ends of the two folding forming modules are respectively connected to the two Y-axis moving mechanisms, as shown. Figure 27 As shown, this not only allows the two ends of the hemming module to be supported by two Y-axis moving mechanisms respectively, so that the two ends of the hemming module can move synchronously through the two Y-axis moving mechanisms, ensuring that the hemming module moves strictly along the Y direction, but also allows the two hemming modules to move synchronously in opposite directions along the Y direction through the two Y-axis moving mechanisms, thereby effectively improving the stability and reliability of the hemming module's movement. As an example, in this embodiment, the Y-axis adjustment module also includes a drive shaft arranged along the X direction. The drive shaft can be connected to the movable frame through a bearing seat, such as... Figure 27 As shown; the two Y-axis moving mechanisms each employ belt drive mechanisms, each including a driving pulley, a driven pulley, and a drive belt, as follows. Figure 27 As shown, two driving pulleys are respectively connected to the drive shaft. For example, the two driving pulleys can be symmetrically arranged at both ends of the drive shaft, and the two driven pulleys are rotatably mounted on the movable frame. The drive belt is tensioned between the driving pulleys and the driven pulleys. Figure 27 As shown, simultaneously, the two ends of the base in one of the folding edge forming modules are respectively connected to the upper sides of the two transmission belts, and the two ends of the other folding edge forming module are respectively connected to the lower sides of the two transmission belts, as shown. Figure 27 As shown, the Y-axis adjustment power can be directly connected to the drive shaft, or it can be connected to the drive shaft through a belt drive mechanism or gear drive mechanism to drive the drive shaft to rotate. For example, Figure 27 As shown, the Y-axis adjustment power is connected to the drive shaft via a belt drive mechanism. The Y-axis adjustment power simultaneously drives the drive shaft to connect two belt drive mechanisms, improving their synchronization and thus enhancing the synchronization of the two hem forming modules. Furthermore, by connecting the two ends of one hem forming module to the upper sides of the two drive belts, and the two ends of the other hem forming module to the lower sides, the forward and reverse rotation of the drive shaft via the Y-axis adjustment power controls the two hem forming modules to move closer or further apart. This allows for quick and precise adjustment of the hem forming modules to the appropriate bag opening width, solving the problem of adapting to bag openings of different widths.

[0095] Example 3

[0096] To better meet the folding requirements of the long sides of bag openings of different lengths, the main difference between this embodiment 3 and the above embodiments is that the length of the folding structure on the side of the folding device in the bag opening machine provided in this embodiment is adjustable, thereby meeting the folding requirements of the two long sides of bag openings of different lengths, such as... Figure 33 As shown.

[0097] As an example, in this embodiment, the folding device includes a Z-axis power source, a support, a folding die, and a telescopic power source. The support is movable along the Z-axis and connected to the frame. For example, the support can be connected to the frame via a linear guide rail. The Z-axis power source is connected to the support for transmission, used to drive the support to move vertically up and down. Figure 28 As shown, this allows for insertion and removal from the bag opening area.

[0098] like Figures 28-32As shown, the folding mold is connected to the bracket. The folding structure is constructed on both sides of the folding mold along the X direction. A telescopic power transmission is connected to the folding mold, and the telescopic power adjusts the length of the folding mold by driving its extension and retraction along the X direction. In implementation, by constructing folding structures on both sides of the folding mold along the X direction and making the folding mold extend and retractable along the X direction, and by connecting the telescopic power transmission to the folding mold, the extension and retraction of the folding mold can be controlled by the telescopic power. The length of the folding mold can be adjusted by extending and retracting it along the X direction, allowing the length of the folding structure to meet the folding requirements of the two long sides of bag openings of different lengths.

[0099] More specifically, such as Figures 28-32 As shown, the folding die includes a guide shaft, two end components, and several intermediate components. The two end components are arranged opposite to each other and can be moved along the X-direction by linear guide rails and connected to a bracket. The guide shaft is arranged along the X-direction and can be fixed to one of the end components, such as... Figure 31 and Figure 32 As shown, another end component has a through hole adapted to the guide shaft, and the intermediate component also has a through hole adapted to the guide shaft. In implementation, it is preferable to configure at least two guide shafts, and at least two through holes are preferably configured in the intermediate component, such as... Figure 30 As shown, each intermediate component is disposed between two end components, and at least both sides of the intermediate components are provided with the folded edge structure, such as... Figures 28-32 As shown, the intermediate component is movably sleeved on the guide shaft through a through hole, and an elastic component is provided between at least two adjacent intermediate components. The elastic component is sleeved on the guide shaft, as shown. Figure 32 As shown, the elastic component can preferably be a conical helical spring, a cylindrical helical compression spring, or a spiral helical spring, so as to transmit elastic force. In implementation, the end component can be directly connected to the intermediate component located at the end, or the elastic component can be arranged between the end component and the intermediate component located at the end, so as to transmit the force between the end component and the intermediate component.

[0100] At the same time, such as Figures 28-33 As shown, it also includes a linkage mechanism, which includes a rotating shaft and a nut. The rotating shaft includes an intermediate shaft section and lead screw sections connected to both ends of the intermediate shaft section. The threads of the two lead screw sections have opposite directions, and each lead screw section is threadedly connected to a nut. The two nuts are respectively connected to two end components, as shown. Figure 31 and Figure 32 As shown, the telescopic power is connected to the intermediate shaft section for driving the rotating shaft to rotate, for example, as... Figure 31 and Figure 32As shown, the telescopic power can preferably use a stepper motor or a servo motor. The telescopic power is connected to the intermediate shaft section through a belt drive mechanism to drive the rotating shaft to rotate. This allows the telescopic power to drive the rotating shaft to rotate forward and backward, causing the two end parts to move closer or further apart. When the two end parts move closer, the elastic component synchronously drives the intermediate parts to move closer, and the elastic potential energy of the elastic component increases, with each intermediate part automatically and evenly distributed between the two end parts. When the two end parts move further apart, the elastic component synchronously drives the intermediate parts to move further apart, and the elastic component automatically releases its elastic force, reducing its elastic potential energy. Each intermediate part is also automatically and evenly distributed between the two end parts. This design not only allows the length of the folding mold and the side folding structure to be adjusted through the telescopic power to meet the folding requirements of the long side in bag openings of different lengths, but also allows for smaller gaps between adjacent folding structures. Each end part can be automatically and evenly distributed between the two end parts, thus facilitating a better folding effect through the combination of various folding structures.

[0101] In a more refined solution, the control module is electrically connected to the Z-axis power and telescopic power to achieve automatic control. Furthermore, during implementation, folding structures can be constructed on both sides of the end component, making the folding structures on both sides of the folding mold longer, such as... Figure 31 and Figure 32 As shown. Furthermore, in implementation, the folded edge structure can also be constructed on both sides of the end component away from the middle component, such as... Figure 31 and Figure 32 As shown, this is to meet the folding requirements of the two wide sides of the bag opening.

[0102] Example 4

[0103] This embodiment provides a bag opening process using the bag opening machine described in Embodiment 3, including: an automatic adjustment process, a cutting process, a first folding process, and a second folding process. The automatic adjustment process includes: adjusting the length of the folding mold in the folding device according to the required bag opening length, so that the length of the folding mold is adapted to the length of the bag opening. In practice, the length can be adjusted by controlling the extension and retraction of the folding mold through telescopic power. Simultaneously, the spacing between the two hem forming modules is adjusted according to the required bag opening width, so that the spacing between the two hem forming modules matches the bag opening width. In implementation, the spacing between the two hem forming modules can be adjusted by adjusting the Y-axis power. In this embodiment, initially, the spacing between the two pull-out parts in the two hem forming modules at the initial position (e.g., position two) can be used as the spacing between the two hem forming modules, and this spacing is greater than the width of the bag opening. The hem forming modules are located on the outside of the hem at the long side of the bag opening. The specific value of the spacing can be determined according to actual needs. For example, the spacing between the two hem forming modules can be greater than the width of the bag opening by 5mm, 8mm, 10mm, etc. There is no specific limitation on this spacing here.

[0104] The cutting process includes: first, laying the fabric flat on the hemming and pressing frame device, and pressing the fabric down using a pressing mechanism, with the planned pocket opening area on the fabric located inside the central insertion opening. Then, moving the hemming forming module along the X direction to the position adapted to the laser cutting module, and using the laser cutting module to cut the required seam shape on the fabric (it can be understood that if the hemming forming module is initially positioned exactly to be adapted to the laser cutting module, this step is not required).

[0105] The first folding process includes: S1, moving the folding forming module along the X direction to the position of the matching folding device, so that the lower end of the folding device is directly facing the bag opening area below, and the folding device corresponds to the gap between the two folding forming modules in the folding pressing frame device.

[0106] S2, drive the folding device to move relative to the folding forming module in the Z direction, so that the folding device can be inserted into the pocket area of ​​the fabric and the limiting surface of the folding structure is located below the fabric (i.e., there is a gap between the limiting surface and the lower surface of the fabric), and the positioning surface of the folding structure corresponds to the fabric.

[0107] S3, based on the width of the bag opening, the Y-axis power drive moves the folding and pressing frame device along the Y direction, bringing the folding forming module on one side of the folding and pressing frame device close to the folding structure on the other side of the folding device, and stopping at the position that matches the folding structure; during this process, the bag edge piece on the corresponding side is inserted into the folding structure and bends to a certain extent under the guidance of the folding structure, with the positioning surface located on the inner side of the fold.

[0108] S4, the pull-out force in the side folding forming module drives the pull-out component to move towards the folding device to position one, and presses the bag edge piece into the folding structure, so that the bag edge piece is bent; in a preferred embodiment, at position one, the end of the pull-out component abuts against the bag edge piece of the fabric, so as to press the bag edge piece tightly against the positioning surface of the folding device, so as to realize the folding of bag openings of different widths in this way, and also to adapt to fabrics of different thicknesses in this way, so that fabrics of different thicknesses can be folded smoothly and achieve better folding effect, thereby effectively solving the problem that the existing folding method cannot meet the better folding needs of fabrics of different thicknesses.

[0109] In step S5, the folding device moves upward along the Z-direction relative to the folding forming module. The limiting surface of the folding device presses the bent pocket edge piece against the lower surface of the pull-out component, better meeting the precise folding requirements of fabrics of different thicknesses. It can be understood that, initially, when the distance between the limiting surface in step S2 and the lower surface of the fabric is equal to or slightly less than the sum of the thickness of the pocket edge piece and the thickness of the pull-out component, this step can be omitted. When the distance is greater than the sum of the thickness of the pocket edge piece and the thickness of the pull-out component, this step not only achieves a better folding effect but is also applicable to fabrics of different thicknesses. It can be understood that, to meet the folding requirements of fabrics of different thicknesses and improve the folding effect, in practice, the distance can be preferentially controlled to be greater than the sum of the thickness of the pocket edge piece and the thickness of the pull-out component, and then this step can be used to press the pocket edge pieces of different thicknesses, which is very convenient and efficient.

[0110] S6, the pressing force in the folding forming module drives the pressing component to move upward, so as to press the bent bag edge piece to fix the bag edge piece and maintain the folding effect for subsequent sewing.

[0111] S7, using the pull-out power in the hem forming module to drive the pull-out component to move to position two in the direction away from the hem forming device, so that the pull-out component exits the hem forming structure. The distance the pull-out component exits can be determined according to actual needs, as long as it does not affect the subsequent sewing at the bag opening. For example, the pull-out component can be moved to a position flush with the end of the upper pressing component, thereby completing the hem forming work on the long side of the bag opening.

[0112] The secondary folding process includes: F1. If step S4 exists, this step drives the folding device to move downward along the Z direction relative to the folding forming module, preferably to the position in step 5, so that the distance between the limiting surface and the lower surface of the fabric is equal to the distance in step 5; if step S4 does not exist, this step can also be omitted.

[0113] F2. Based on the width of the bag opening, the Y-axis power drive moves the folding and pressing frame device in the opposite direction along the Y-axis, bringing the folding forming module on the other side of the folding and pressing frame device close to the folding structure on the corresponding side of the folding device, and stopping at the position that matches the folding structure; during this process, the bag edge piece on the corresponding side is inserted into the folding structure and bends to a certain extent under the guidance of the folding structure; at this time, the other side of the bag opening that has been folded gradually moves away from the folding device;

[0114] Repeat steps 6-9 to complete the folding of the other long side of the bag opening;

[0115] Step F3: Use the Y-direction power to drive the folding and pressing frame device to move along the Y direction, so that the folding device moves to the middle position of the two folding forming modules relative to the folding forming module. Then drive the folding device to move upward along the Z direction relative to the folding forming module, so that the folding device and the folding forming module separate from each other, thereby successfully completing the folding work of the long side in the bag opening of different widths and lengths.

[0116] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A bag-opening machine, characterized in that, Including racks, A folding device is connected to the frame, and folding structures are respectively provided on both sides of the folding device along the X direction. Y-axis drive device, the Y-axis drive device including Y-axis power, and A hemming and pressing device, comprising a movable frame, a Y-axis hemming unit, and a pressing mechanism for restraining the fabric, wherein... The movable frame is connected to the frame and forms a sliding pair with the frame along the Y direction. The Y-direction folding unit is disposed on the movable frame. The Y-direction folding unit includes a Y-direction adjustment module and two folding forming modules adapted to the folding structure. The two folding forming modules are arranged opposite to each other, and a gap is formed between the two folding forming modules for the insertion of the folding device. The Y-direction adjustment module is disposed on the movable frame. The Y-direction adjustment module includes a Y-direction adjustment power and a Y-direction moving mechanism. The Y-direction adjustment power is drivenly connected to the Y-direction moving mechanism, and the Y-direction moving mechanism is drivenly connected to the folding forming module. The spacing between the two folding forming modules along the Y direction is adjusted by the Y-direction adjustment power. The Y-axis power is connected to the movable frame transmission. The position of the folding and pressing frame device along the Y direction is adjusted by the Y-axis power, so that the folding forming module and the folding structure on the corresponding side form a folding fit, so as to realize the folding of the bag opening on both sides along the X direction.

2. The bag-opening machine according to claim 1, characterized in that, The two edge-forming modules are moved synchronously in opposite directions along the Y direction by adjusting the power in the Y direction.

3. The bag-opening machine according to claim 2, characterized in that, The Y-axis adjustment module includes two Y-axis moving mechanisms, which are arranged parallel to each other along the Y-axis. The two Y-axis moving mechanisms are respectively arranged on both sides of the folding edge forming module, and the two ends of the two folding edge forming modules are respectively connected to the two Y-axis moving mechanisms.

4. The bag-opening machine according to claim 3, characterized in that, The Y-axis adjustment module also includes a drive shaft arranged along the X-axis. The two Y-axis moving mechanisms are belt drive mechanisms, each including a driving pulley, a driven pulley, and a drive belt. The two driving pulleys are connected to the drive shaft, and the two driven pulleys are rotatably mounted on the movable frame. The drive belt is tensioned between the driving pulley and the driven pulley. One end of the folding edge forming module is connected to the upper side of the two drive belts, and the other end of the folding edge forming module is connected to the lower side of the two drive belts. The Y-axis adjustment power is connected to the drive shaft to drive the drive shaft to rotate.

5. The bag-opening machine according to claim 1, characterized in that, The folding forming module includes a base, a pull-out mechanism, and an upper pressing mechanism, wherein the base is drivenly connected to the Y-axis moving mechanism. The pressing mechanism includes a pressing component and a pressing power source connected to the base. The pressing power source is driven by the pressing component. The pull-out mechanism includes a pull-out component and a pull-out power source connected to the base. The pull-out component is movably arranged along the Y direction, and the pull-out power source is connected to the pull-out component. The pull-out component is located between the lower pressing mechanism and the upper pressing mechanism, and the fabric is clamped by the cooperation between the lower pressing mechanism and the pull-out component. The pulling force is used to drive the pulling component to move towards the folding device to position one, and press the corresponding side of the bag edge piece onto the folding structure, so that the bag edge piece is bent. The pressing force is used to drive the pressing component to press the bent bag edge piece. The pulling force is also used to drive the pulling component to move towards position two in the direction away from the folding device, so that the pulling component exits the folding structure.

6. The bag-opening machine according to claim 5, characterized in that, The pulling power is provided by a cylinder, one end of which is connected to the base and the other end is connected to the pulling component. The cylinder extends and retracts along the Y direction. The base is constructed with a guide groove along the Y direction, and the side of the pull-out component is movably constrained by the guide groove. The upper pressing power is a cylinder. One end of the cylinder is connected to the base, and the other end is connected to the upper pressing component. The cylinder extends and retracts in the Z direction to drive the upper pressing component to rise and fall vertically. It also includes a guiding mechanism, which includes a guiding part and a sliding part adapted to the guiding part. The sliding part is movably constrained by the guiding part. The guiding part is arranged in the movable frame along the Y direction, and the base is connected to the sliding part.

7. The bag-opening machine according to any one of claims 1-6, characterized in that, The folding device includes a folding mold and a telescopic power source. The folding mold is connected to the frame. The folding mold has folding structures on both sides along the X direction. The telescopic power source is connected to the folding mold and adjusts the length of the folding mold by driving the folding mold to extend and retract along the X direction.

8. The bag-opening machine according to claim 7, characterized in that, The folding mold includes a guide shaft, two end parts, and several intermediate parts. The two end parts are arranged opposite to each other, and the guide shaft is arranged along the X direction. The guide shaft is fixed to one of the end parts. The other end part has a guide hole adapted to the guide shaft. The intermediate parts have a guide hole adapted to the guide shaft. The intermediate parts are disposed between the two end parts. At least two sides of the intermediate parts are respectively provided with the folding structure. The intermediate parts are movably sleeved on the guide shaft through the guide hole. At least two adjacent intermediate parts are provided with an elastic member, which is sleeved on the guide shaft. The folding device also includes a linkage mechanism, which includes a rotating shaft and a nut. The rotating shaft includes an intermediate shaft section and lead screw sections connected to both ends of the intermediate shaft section. The threads of the two lead screw sections have opposite directions. Each lead screw section is threaded with a nut, and the two nuts are respectively connected to two end parts. The telescopic force is transmitted through the intermediate shaft section to drive the rotating shaft to rotate. When the two end parts approach each other, the intermediate parts are driven to approach each other synchronously, and the elastic potential energy of the elastic component increases. When the two end parts move away from each other, the intermediate parts are driven to move away from each other synchronously, and the elastic potential energy of the elastic component decreases.

9. The bag-opening machine according to claim 1, characterized in that, The Y-axis drive device also includes a Y-axis transmission mechanism. The Y-axis power is connected to the movable frame through the Y-axis transmission mechanism. The Y-axis transmission mechanism includes a belt transmission mechanism, a gear-rack transmission mechanism, or a screw-nut transmission mechanism. It also includes a connecting frame, which is connected to the frame and forms a sliding pair with the frame in the X direction, and the movable frame is connected to the connecting frame and forms a sliding pair with the connecting frame in the Y direction; The folding device is configured to be able to move up and down in the Z direction and / or the folding frame pressing device is configured to be able to move up and down in the Z direction; The folded edge structure includes a positioning surface and a hook protruding from the positioning surface. The hook is constructed with a limiting surface for restricting the edge piece of the bag, so that the positioning surface and the limiting surface can form a hook shape.

10. A bag-opening process, characterized in that, The bag opening machine according to any one of claims 1-8 includes: an automatic adjustment process, a cutting process, a first folding process, and a second folding process, wherein the automatic adjustment process includes: adjusting the distance between two folding forming modules according to the required width of the bag opening, so that the distance between the two folding forming modules is adapted to the width of the bag opening; The cutting process includes: constraining the fabric to the hemming and pressing device, and using a laser cutting module to cut out the required seam shape on the fabric; The first folding process includes: making the folding device correspond to the gap between the two folding forming modules in the folding forming module, making the folding device and the folding forming module move relative to each other in the Z direction, so that the folding device is inserted into the fabric, and the limiting surface of the folding structure is located below the fabric, and the positioning surface of the folding structure corresponds to the fabric. Based on the width of the bag opening, the Y-axis power drive moves the folding and pressing frame device along the Y direction, causing the folding forming module on one side of the folding and pressing frame device to approach the folding structure on the other side of the folding device and stop at a position that matches the folding structure, thereby driving the bag edge piece on that side to bend; the pull-out power in the folding forming module on that side drives the pull-out component to move towards the folding device to position one, pressing the bag edge piece into the folding structure, thus forming a bend in the bag edge piece; the upper pressure power in the folding forming module drives the upper pressure component to press the bent bag edge piece tightly; the pull-out power in the folding forming module drives the pull-out component to move away from the folding device to position two, causing the pull-out component to exit the folding structure, completing the folding work on one side of the bag opening; The secondary folding process includes: based on the width of the bag opening, using Y-direction power to drive the folding and pressing frame device to move in the opposite direction of the Y direction, so that the folding forming module on the other side of the folding and pressing frame device approaches the folding structure on the corresponding side of the folding device and stops at a position that matches the folding structure, thereby driving the bag edge piece on that side to bend; using the pull-out power in the folding forming module on that side to drive the pull-out component to move towards the folding device to position one, and pressing the bag edge piece into the folding structure, so that the bag edge piece forms a bend; using the upward pressing power in the folding forming module to drive the upward pressing component to press the bent bag edge piece; using the pull-out power in the folding forming module to drive the pull-out component to move away from the folding device to position two, so that the pull-out component exits the folding structure, completing the folding work on the other side of the bag opening.

11. The bag-opening process according to claim 10, characterized in that, The automatic adjustment process also includes: adjusting the length of the folding mold in the folding device according to the required length of the bag opening, so that the length of the folding mold is adapted to the length of the bag opening; And / or, the first folding process further includes: driving the folding device to move upward along the Z direction relative to the folding forming module, and using the limiting surface of the folding device to press the bent bag edge piece against the lower surface of the pull-out component; the second folding process further includes: driving the folding device to move upward along the Z direction relative to the folding forming module, and using the limiting surface of the folding device to press the bent bag edge piece against the lower surface of the pull-out component.

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