Folding and sewing methods, folding devices and patching machines

Abstract

This application relates to a folding and sewing method, a folding device, and a bag-attaching machine. The folding and sewing method uses a folding device to sew a fabric bag and includes the following steps: a tongue-pressing plate is placed on the worktable; a tongue-pressing plate driver drives the tongue-pressing plate to extend outward and places the bag on the tongue-pressing plate; a bracket driver drives a mounting bracket to move towards the tongue-pressing plate; when the tongue-pressing plate contacts an elastic body, the mounting bracket stops moving; a magnet driver drives a magnetic suction component to move towards the tongue-pressing plate; when the magnetic suction component passes through a perforated hole and is magnetically attracted to the bag and the tongue-pressing plate, the magnet driver drives the tongue-pressing plate to press against the elastic body, causing the tongue-pressing plate to be recessed into the elastic body. The folding and sewing method, folding device, and bag-attaching machine provided by this application solve the problem of high manufacturing costs caused by the need to frequently change the concave mold when changing bag styles.

Description

Technical Field

[0001] This application relates to the field of sewing equipment technology, and in particular to a folding and sewing method, a folding device, and a bag attaching machine. Background Technology

[0002] The patch pocket machine is mainly used in the sewing of denim garments and shirt pockets. It can complete flat stitching and buttonhole stitching in one go. It is suitable for sewing back pockets of various jeans, shirt pockets, and other irregularly shaped parts in garment processing.

[0003] Patch pocket machines require a flap, die, and fabric piece to fold the pocket in a specific sequence. However, with increasing demand for personalized clothing and a wider variety of pocket styles, shapes, and sizes, traditional folding methods necessitate replacing not only the flap but also the matching die when changing pocket styles. This leads to high manufacturing costs, long mold production cycles, and reduced processing efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a folding and sewing method, a folding device, and a patching machine to solve the problem of high manufacturing costs caused by the need to frequently change the die when changing pocket styles.

[0005] The hemming and sewing method provided in this application uses a hemming device to sew the bag. The hemming device includes a tongue depressor, a magnetic component, an elastomer, a mounting bracket, a magnetic drive component, a tongue depressor drive component, and a bracket drive component. The elastomer and the magnetic drive component are respectively mounted on the mounting bracket. The elastomer has elastic deformation capability and is provided with a perforated hole. The area between the outer edge of the elastomer and the edge of the perforated hole can cover the outer edge of the tongue depressor, so that the tongue depressor can press against and be recessed into the elastomer.

[0006] The hem stitching method includes the following steps: a tongue depressor is placed on the worktable surface; a tongue depressor drive mechanism drives the tongue depressor to extend outward and places the pocket on the tongue depressor; a bracket drive mechanism drives the mounting bracket to move towards the tongue depressor; when the tongue depressor contacts the elastomer, the mounting bracket stops moving; a magnet drive mechanism drives the magnetic suction component to move towards the tongue depressor; when the magnetic suction component passes through the perforation and is magnetically attracted by the pocket and the tongue depressor, the magnet drive mechanism drives the tongue depressor to press against the elastomer and cause the tongue depressor to be recessed into the elastomer.

[0007] In one embodiment, the folding device further includes a folding assembly and a folding drive, the folding drive being mounted on a mounting bracket; the folding sewing method further includes the following steps: the folding drive drives the folding assembly to fold the pocket; the bracket drive drives the mounting bracket and the tongue depressor to move together toward the operating table; the folding drive drives the folding assembly to disengage from the pocket; the tongue depressor and the magnetic clasp separate; and the tongue depressor drive drives the tongue depressor to disengage from the pocket.

[0008] In one embodiment, the folding device further includes an ejector drive member mounted on a mounting bracket; the folding and sewing method further includes the following steps: the ejector drive member presses against the tongue plate, the ejector drive member pushes the tongue plate to move away from the magnetic attractor and separates it from the magnetic attractor, until the tongue plate is pressed against the surface of the operating table by the ejector drive member.

[0009] In one embodiment, the hem stitching method further includes the following steps: when the tongue depressor presses against the elastomer, the tongue depressor can move synchronously with the tongue depressor drive.

[0010] In one embodiment, the hem stitching method further includes the following step: pressing a tongue depressor onto an elastomer so that the depth of the groove formed by the elastomer is greater than the thickness of the tongue depressor.

[0011] This application also provides a folding device for sewing fabric bags. The folding device includes a tongue depressor, a magnetic component, an elastic body, a mounting bracket, a folding assembly, a folding drive, a magnetic drive, a tongue depressor drive, and a bracket drive. The elastic body, the magnetic drive, and the folding drive are respectively mounted on the mounting bracket. The tongue depressor is connected to the output end of the tongue depressor drive, which can drive the tongue depressor to extend outward or retract inward. The mounting bracket is connected to the output end of the bracket drive, which can drive the mounting bracket to move towards or away from the tongue depressor. The device features a magnetic clasp connected to the output end of a magnetic drive unit, which moves the magnetic clasp closer to or further away from the tongue depressor. An elastomer with elastic deformation capability and a perforated hole covers the outer edge of the tongue depressor. When the magnetic clasp passes through the perforated hole and is magnetically attracted to the pocket and tongue depressor, the magnetic drive unit presses the tongue depressor against the elastomer, causing it to be recessed into the elastomer. A flap assembly is connected to the output end of a flap drive unit, which folds the pocket.

[0012] In one embodiment, the folding device further includes a limiting nut and an adjusting screw. One end of the adjusting screw is threadedly connected to the limiting nut, and the other end is movably inserted through the output end of the magnet drive and fixedly installed on the mounting bracket, so that the output end of the magnet drive is movably limited between the mounting bracket and the limiting nut.

[0013] In one embodiment, the folding device further includes a magnet mounting base, which is mounted on the output end of the magnet drive component, and a magnetic suction component is mounted on the magnet mounting base; furthermore, the magnet mounting base is provided with multiple mounting holes, and the number of magnetic suction components is multiple, with each magnetic suction component being mounted in a corresponding mounting hole.

[0014] In one embodiment, the magnet drive, the flap drive, the tongue drive, and the bracket drive are one of a cylinder, a motor, or a hydraulic transmission component.

[0015] This application also provides a bag-applying machine, which includes the folding device described in any of the above embodiments.

[0016] Compared with the prior art, the folding and sewing method, folding device and patching machine provided in this application can cover the outer edge of the tongue plate when different tongue plates are replaced due to different pocket shapes. In addition, the area between the outer edge of the elastomer and the edge of the hole can cover the outer edge of the tongue plate. Furthermore, the elastomer itself has elastic deformation capability. Therefore, tongue plates of different shapes can be pressed into the same shape of groove on the elastomer.

[0017] Furthermore, in order to achieve stable pressing between the tongue depressor and the elastomer, that is, in order to enable different tongue depressors to press together to form grooves on the elastomer, this application also provides a magnetic driving component to drive the magnetic suction component to attract the tongue depressor and drive the tongue depressor to press the elastomer toward the direction closer to the elastomer, so that the tongue depressor is recessed in the groove of the elastomer.

[0018] Furthermore, by driving the tongue depressor plate away from the elastomer using a magnet drive, the elastomer can be restored to its original shape.

[0019] This design eliminates the need for frequent replacement of the elastomer when changing pocket styles, thereby reducing manufacturing costs and shortening the mold production cycle, which in turn improves processing efficiency.

[0020] Furthermore, due to the presence of the perforated holes, when the elastomer deforms, the elastomer on the side closest to the perforated holes can bulge into the perforated holes. In other words, the perforated holes provide sufficient deformation space for the elastic deformation of the elastomer and facilitate rapid deformation of the elastomer.

[0021] Furthermore, compared to the method where an elastomer is sandwiched between the magnetic component and the tongue depressor, the method of setting a perforation allows the magnetic component to pass through the elastomer and attract the tongue depressor, which greatly improves the magnetic connection between the magnetic component and the tongue depressor and prevents the tongue depressor from separating from the magnetic component during the process of pressing the elastomer. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the assembly structure of the folding device and the operating table according to an embodiment of this application;

[0024] Figure 2 A cross-sectional view of the assembly structure of the folding device and the operating table according to an embodiment provided in this application;

[0025] Figure 3 A partial structural diagram of a folding device according to an embodiment of this application. Figure 1 ;

[0026] Figure 4 A partial structural diagram of a folding device according to an embodiment of this application. Figure 2 .

[0027] Reference numerals: 100, tongue depressor; 200, folding assembly; 210, folding drive; 300, magnetic component; 310, magnet drive; 311, limit nut; 312, adjusting screw; 313, limit plate; 320, magnet mounting base; 400, elastic body; 410, elastic body mounting base; 420, perforated hole; 500, mounting bracket; 600, ejection drive; 700, operating table. Detailed Implementation

[0028] The patch pocket machine is mainly used in the sewing of denim garments and shirt pockets. It can complete flat stitching and buttonhole stitching in one go. It is suitable for sewing back pockets of various jeans, shirt pockets, and other irregularly shaped parts in garment processing.

[0029] Patch pocket machines require a flap, die, and fabric piece to fold the pocket in a specific sequence. However, with increasing demand for personalized clothing and a wider variety of pocket styles, shapes, and sizes, traditional folding methods necessitate replacing not only the flap but also the matching die when changing pocket styles. This leads to high manufacturing costs, long mold production cycles, and reduced processing efficiency.

[0030] Please see Figures 1-4To address the issue of high manufacturing costs caused by frequent mold replacements when changing pocket styles, this application provides a folding and sewing method, a folding device, and a patching machine. The folding device includes a tongue depressor 100, a folding assembly 200, a magnetic chuck 300, an elastic body 400, a mounting bracket 500, an ejector drive 600, a magnetic drive 310, a folding drive 210, a tongue drive (not shown), and a bracket drive (not shown). The elastic body 400, magnetic drive 310, ejector drive 600, and folding drive 210 are respectively mounted on the mounting bracket 500. The magnetic chuck 300 is connected to the output end of the magnetic drive 310. The folding assembly 200 is connected to the output end of the folding drive 210. The mounting bracket 500 is connected to the output end of the bracket drive. The tongue depressor 100 is connected to the output end of the tongue drive. The ejector drive 600 is used to push the tongue depressor 100 and the magnetic chuck 300 apart.

[0031] In one embodiment, the ejector drive 600, magnet drive 310, flap drive 210, tongue drive and bracket drive are all cylinders.

[0032] Cylinders use gas pressure for transmission, avoiding energy waste caused by mechanical friction. Therefore, cylinder transmission is more energy-efficient.

[0033] However, this is not the only one. In other embodiments, the ejector drive 600, magnet drive 310, flap drive 210, tongue drive and bracket drive can also be motors or hydraulic transmission components.

[0034] like Figure 2 and Figure 4 As shown, the elastic body 400 extends along the outer edge of the tongue depressor 100 and is in the shape of a U, V or other shape, depending mainly on the shape of the tongue depressor 100. The elastic body 400 has elastic deformation capability. The elastic body 400 is provided with a hollow hole 420. The area between the outer edge of the elastic body 400 and the edge of the hollow hole 420 (that is, the inner edge of the elastic body 400) can cover the outer edge of the tongue depressor 100 so that the tongue depressor 100 can be pressed and recessed into the elastic body 400.

[0035] Specifically, in one embodiment, the elastomer 400 is a sponge.

[0036] This design has two advantages: firstly, the sponge component is widely available and inexpensive, thus reducing the manufacturing cost of the elastomer 400; secondly, the sponge component has good softness, which can prevent damage to the surface of the tongue depressor 100.

[0037] However, it is not limited to this. In other embodiments, the elastomer 400 can also be a variety of soft and elastic materials such as pearl cotton, rubber or silicone, which will not be listed here.

[0038] The hem stitching method includes the following steps:

[0039] The tongue depressor 100 is disposed on the table surface of the operating table 700, and the pocket is placed on the tongue depressor 100. Specifically, when the pocket is folded, the tongue depressor drive drives the tongue depressor 100 to extend outward (move horizontally forward) and place the pocket on the tongue depressor 100. Then, the bracket drive drives the mounting bracket 500 to move toward the tongue depressor 100 (move downward), and when the tongue depressor 100 contacts the elastomer 400, the mounting bracket 500 stops moving.

[0040] In one embodiment, such as Figure 2 and Figure 4 As shown, the folding device also includes a projectile mounting base 410, and the elastic body 400 is bonded to the projectile mounting base 410 and detachably connected to the mounting bracket 500 through the projectile mounting base 410.

[0041] Subsequently, the magnet drive 310 drives the magnetic suction component 300 to move toward the tongue depressor 100. When the magnetic suction component 300 passes through the hollow hole 420 and is magnetically attracted to the tongue depressor 100 through the pocket (that is, the pocket is sandwiched between the tongue depressor 100 and the magnetic suction component 300), the magnet drive 310 drives the tongue depressor 100 to press (move upward) against the elastic body 400 and make the tongue depressor 100 recessed in the elastic body 400.

[0042] In one embodiment, such as Figure 2 and Figure 3 As shown, the folding device also includes a magnet mounting base 320, which is mounted on the output end of the magnet drive unit 310, and the magnetic suction unit 300 is mounted on the magnet mounting base 320.

[0043] This configuration facilitates the installation of the magnetic suction component 300 and the magnet drive component 310.

[0044] Furthermore, in one embodiment, the magnet mounting base 320 is provided with a plurality of mounting holes (not shown), and there are a plurality of magnetic suction members 300, each magnetic suction member 300 being mounted in a corresponding mounting hole.

[0045] Specifically, the magnet mounting base 320 has a large mounting hole in the middle and multiple smaller mounting holes around it. The mounting holes around the middle are arranged to make the magnetic attraction force of the magnetic attractor 300 on the tongue depressor 100 more even.

[0046] In one embodiment, such as Figures 1-3As shown, the folding device also includes a limiting nut 311 and an adjusting screw 312. One end of the adjusting screw 312 is threadedly connected to the limiting nut 311, and the other end is movably inserted through the output end of the magnet drive 310 and fixedly installed on the mounting bracket 500, so that the output end of the magnet drive 310 is movably limited between the mounting bracket 500 and the limiting nut 311.

[0047] This setting limits the travel distance of the magnet drive 310, preventing excessive movement of the magnet drive 310 from causing a decrease in the folding accuracy of the fabric bag.

[0048] Furthermore, by turning the limit nut 311, the travel distance of the magnet drive component 310 can be adjusted, which greatly improves the adaptability of the folding device to bags of different thicknesses.

[0049] By setting the limit nut 311 and adjusting screw 312, when the output end of the magnet drive 310 is stopped by the limit nut 311, the magnet drive 310 stops moving, and the pressure plate 100 and the elastic body 400 are just in the appropriate pressing position.

[0050] It should be noted that, in one embodiment, when the tongue depressor 100 presses against the elastic body 400, the tongue depressor 100 can move synchronously with the tongue plate drive member. Specifically, the tongue plate drive member drives the tongue depressor 100 to move in the vertical direction.

[0051] This setting ensures that the tongue depressor 100 remains horizontal, preventing it from tilting.

[0052] However, this is not the only embodiment. In other embodiments, the tongue depressor 100 can also move upward through its own elastic bending deformation, while the tongue depressor remains fixed.

[0053] Furthermore, in one embodiment, as Figures 1-3 As shown, the folding device also includes a limiting plate 313, which is disposed above the magnet drive 310. The limiting plate 313 and the limiting nut 311 cooperate to limit the rising position of the magnet drive 310.

[0054] The hem stitching method also includes the following steps:

[0055] Folding drive 210 drives folding assembly 200 to fold the pocket (moving horizontally inward).

[0056] Then, the bracket drive unit drives the mounting bracket 500 and the tongue depressor 100 to move together toward the operating table 700 (moving downwards until they are 1mm-3mm away from the surface of the operating table 700 and then stopping), and the flap drive unit 210 drives the flap assembly 200 to disengage from the pocket (moving horizontally outwards).

[0057] Then, the ejector drive 600 drives the tongue depressor 100 to move away from the magnetic suction member 300, so that the tongue depressor 100 and the magnetic suction member 300 are separated.

[0058] Furthermore, the ejector drive 600 presses against the tongue depressor 100, and the ejector drive 600 pushes the tongue depressor 100 to move away from the magnetic suction member 300 until the tongue depressor 100 is pressed onto the table surface of the operating table 700 by the ejector drive 600, thereby preventing the tongue depressor 100 from shifting horizontally when it separates from the magnetic suction member 300.

[0059] However, it is not limited to this. In other embodiments, the magnetic attractor 300 can also be an electromagnet. When the electromagnet is de-energized, the tongue plate driver can drive the tongue plate 100 to move toward the magnetic attractor 300.

[0060] Finally, the tongue plate drive unit drives the tongue depressor 100 to disengage from the pocket (moving horizontally backward).

[0061] In one embodiment, when the tongue depressor 100 is pressed against the elastic body 400, the recessed area formed by the elastic body 400 is defined as a groove (not shown in the figure). The depth of the groove is greater than the thickness of the tongue depressor 100. That is, the lower surface of the tongue depressor 100 facing the operating table 700 is also recessed in the groove of the elastic body 400.

[0062] This configuration prevents interference between the tongue depressor 100 and the folding assembly 200 when the folding drive 210 drives the folding assembly 200 to fold the pocket.

[0063] Specifically, the lower surface of the tongue depressor 100 is recessed into the elastomer 400 to a depth of 0-2 mm.

[0064] When different tongue depressors 100 are replaced due to different pocket shapes, the area between the outer edge of the elastomer 400 and the edge of the perforated hole 420 can cover the outer edge of the tongue depressor 100, and the elastomer 400 itself has elastic deformation capability. Therefore, tongue depressors 100 of different shapes can all be pressed into the elastomer 400 to form the same shape of groove.

[0065] Furthermore, in order to achieve stable pressing between the tongue depressor 100 and the elastic body 400, that is, in order to enable different tongue depressors 100 to press and form grooves on the elastic body 400, this application also provides a magnetic drive 310 to drive the magnetic suction 300 to attract the tongue depressor 100 and drive the tongue depressor 100 to press the elastic body 400 in a direction close to the elastic body 400, so that the tongue depressor 100 is recessed in the groove of the elastic body 400.

[0066] Furthermore, by driving the tongue depressor 100 to move away from the elastic body 400 through the magnet drive 310, the elastic body 400 can be restored to its original state.

[0067] This design eliminates the need for frequent replacement of the elastomer 400 when changing pocket styles, thereby reducing manufacturing costs, shortening the mold production cycle, and improving processing efficiency.

[0068] Furthermore, due to the presence of the perforated hole 420, when the elastic body 400 deforms, the side of the elastic body 400 near the perforated hole 420 can bulge into the perforated hole 420. That is, the perforated hole 420 provides sufficient deformation space for the elastic deformation of the elastic body 400, and facilitates the rapid deformation of the elastic body 400.

[0069] Furthermore, compared to the case where an elastic body 400 is sandwiched between the magnetic suction component 300 and the tongue depressor 100, the magnetic suction component 300 can pass through the elastic body 400 and be attracted to the tongue depressor 100 by setting a hollow hole 420, which greatly improves the magnetic connection between the magnetic suction component 300 and the tongue depressor 100 and prevents the tongue depressor 100 from separating from the magnetic suction component 300 during the process of pressing the elastic body 400.

[0070] This application also provides a bag-applying machine, which includes the folding device described in any of the above embodiments.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

[0073] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A method for hemming and sewing, characterized in that, The bag is sewn using a folding device, which includes a tongue depressor (100), a magnetic suction element (300), an elastic body (400), a mounting bracket (500), a magnetic drive element (310), a tongue depressor, and a bracket drive element. The elastic body (400) and the magnetic drive element (310) are respectively mounted on the mounting bracket (500). The elastic body (400) has elastic deformation capability. The elastic body (400) is provided with a hollow hole (420). The area between the outer side of the elastic body (400) and the edge of the hollow hole (420) can cover the outer side of the tongue depressor (100) so that the tongue depressor (100) can press and be recessed into the elastic body (400). The hem stitching method includes the following steps: The tongue depressor (100) is disposed on the table surface of the operating table (700), and the tongue depressor drive unit drives the tongue depressor (100) to extend outward and place the pocket on the tongue depressor (100); The bracket drive drives the mounting bracket (500) to move toward the tongue depressor (100), and the mounting bracket (500) stops moving when the tongue depressor (100) and the elastic body (400) come into contact. The magnet drive (310) drives the magnetic suction member (300) to move toward the tongue depressor (100). When the magnetic suction member (300) passes through the hollow hole (420) and is magnetically attracted by the pocket and the tongue depressor (100), the magnet drive (310) drives the tongue depressor (100) to press against the elastic body (400) and make the tongue depressor (100) recessed into the elastic body (400).

2. The hem-stitching method according to claim 1, characterized in that, The folding device further includes a folding assembly (200) and a folding drive (210), the folding drive (210) being mounted on the mounting bracket (500); The hem stitching method also includes the following steps: The flap drive (210) drives the flap assembly (200) to fold the pocket; The bracket drive unit drives the mounting bracket (500) and the tongue depressor (100) to move together toward the operating table (700); The flap drive (210) drives the flap assembly (200) to disengage from the pocket; The tongue depressor (100) and the magnetic suction element (300) are separated; The tongue depressor drives the tongue depressor (100) to disengage from the pocket.

3. The hem-stitching method according to claim 2, characterized in that, The folding device further includes an ejector drive (600), which is mounted on the mounting bracket (500); The hem stitching method further includes the following steps: the ejector drive (600) pushes the tongue depressor (100) against the tongue depressor (100), the ejector drive (600) pushes the tongue depressor (100) to move away from the magnetic suction member (300) and separate it from the magnetic suction member (300) until the tongue depressor (100) is pressed against the table surface of the operating table (700) by the ejector drive (600).

4. The hem-stitching method according to claim 1, characterized in that, It also includes the following steps: When the tongue depressor (100) presses against the elastic body (400), the tongue depressor (100) can move synchronously with the tongue drive member.

5. The hem-stitching method according to claim 1, characterized in that, It also includes the following steps: The tongue depressor (100) is pressed against the elastic body (400) so that the depth of the groove formed by the elastic body (400) is greater than the thickness of the tongue depressor (100).

6. A folding device, characterized in that, For sewing cloth bags, the folding device includes a tongue depressor (100), a magnetic element (300), an elastic body (400), a mounting bracket (500), a folding assembly (200), a folding drive (210), a magnetic drive (310), a tongue depressor, and a bracket drive. The elastic body (400), the magnetic drive (310), and the folding drive (210) are respectively mounted on the mounting bracket (500). The tongue depressor (100) is connected to the output end of the tongue depressor, and the tongue depressor can drive the tongue depressor (100) to extend outward or retract inward. The mounting bracket (500) is connected to the output end of the bracket drive, and the bracket drive can drive the mounting bracket (500) to move toward or away from the tongue depressor (100); The magnetic suction member (300) is connected to the output end of the magnet driving member (310), and the magnet driving member (310) can drive the magnetic suction member (300) to move toward or away from the tongue depressor (100); The elastic body (400) has elastic deformation capability. The elastic body (400) is provided with a hollow hole (420). The area between the outer side of the elastic body (400) and the edge of the hollow hole (420) can cover the outer side of the tongue depressor (100). When the magnetic suction member (300) passes through the hollow hole (420) and is magnetically attracted to the pocket and the tongue depressor (100), the magnetic drive member (310) can drive the tongue depressor (100) to press against the elastic body (400) and make the tongue depressor (100) recessed into the elastic body (400). The flap assembly (200) is connected to the output end of the flap driver (210), and the flap driver (210) can drive the flap assembly (200) to fold the pocket.

7. The folding device according to claim 6, characterized in that, It also includes a limiting nut (311) and an adjusting screw (312). One end of the adjusting screw (312) is threadedly connected to the limiting nut (311), and the other end is movably inserted through the output end of the magnet drive (310) and fixedly installed on the mounting bracket (500), so that the output end of the magnet drive (310) is movably limited between the mounting bracket (500) and the limiting nut (311).

8. The folding device according to claim 6, characterized in that, It also includes a magnet mounting base (320), which is mounted on the output end of the magnet drive (310), and the magnetic suction member (300) is mounted on the magnet mounting base (320); Furthermore, the magnet mounting base (320) is provided with a plurality of mounting holes, and the number of magnetic suction components (300) is plurality of, with each magnetic suction component (300) being mounted in a corresponding mounting hole.

9. The folding device according to claim 6, characterized in that, The magnet drive (310), the folding drive (210), the tongue drive, and the bracket drive are all of the following: a cylinder, a motor, or a hydraulic transmission component.

10. A bag-applying machine, characterized in that, Includes the folding device as described in any one of claims 1-9.

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