Method and apparatus for continuous winding of diaphragms

Abstract

This invention relates to the field of battery manufacturing technology, and discloses a method and apparatus for continuous winding of separators, comprising the steps of: moving an unloaded winding needle to a winding station; continuously feeding the outer and inner separators, while the fully loaded and unloaded winding needles continuously rotate; cutting the outer and inner separators between the winding station and the post-processing station to form an outer membrane winding end on the outer separator and an inner membrane winding end on the inner separator; adsorbing and fixing the outer and inner separators onto the unloaded winding needle; the inner separator being positioned close to the unloaded winding needle and directly adsorbed and fixed onto it; and extending the outer membrane winding end beyond the inner membrane winding end along the rotation direction of the unloaded winding needle to form a staggered extension section; the outer separator being adsorbed and fixed onto the unloaded winding needle through the staggered extension section. This invention reduces auxiliary time in the core manufacturing process, and the inner and outer separators, as well as the unloaded winding needle at the winding station, remain in a continuous operation throughout the process, improving the core processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and more specifically to a method and apparatus for continuous winding of separators. Background Technology

[0002] Winded cells are a crucial component of batteries. Typically, they are manufactured by winding a separator and electrodes using a needle. The separator has inner and outer layers, with the electrodes sandwiched between them. After a needle winds a core at a winding station, it needs to be transferred to the next station for post-processing. At this point, the two separator layers need to be cut between the winding and post-processing stations, and another empty needle is brought in to replace it at the winding station to wind the next core. However, in existing technology, to cut the two separator layers and reattach them to the empty needle at the winding station, the separator conveyor needs to be stopped, resulting in significant auxiliary time and low processing efficiency. Summary of the Invention

[0003] In view of this, the present invention provides a method and apparatus for continuous winding of diaphragms to solve the problem of low processing efficiency and the need for a large amount of auxiliary time in the core manufacturing process in the prior art.

[0004] On one hand, the present invention provides a method for continuous winding of a diaphragm, including the steps of: transferring a fully loaded winding needle from the winding station to the post-processing station, and driving the outer diaphragm and the inner diaphragm to extend from the winding station to the post-processing station, and moving an unloaded winding needle to the winding station.

[0005] The outer and inner diaphragms are continuously fed, and the fully loaded and unloaded winding needles rotate continuously. The outer and inner diaphragms between the winding station and the post-processing station are cut to form an outer membrane winding end on the outer diaphragm and an inner membrane winding end on the inner diaphragm. The outer and inner diaphragms are adsorbed and fixed on the unloaded winding needle. The inner diaphragm is set close to the unloaded winding needle and directly adsorbed and fixed on the unloaded winding needle. Along the rotation direction of the unloaded winding needle, the outer membrane winding end extends beyond the inner membrane winding end to form a staggered extension section. The outer diaphragm is adsorbed and fixed to the unloaded winding needle through the staggered extension section.

[0006] In one optional embodiment, cutting the outer and inner diaphragms between the winding station and the post-processing station includes:

[0007] Cut both the outer and inner diaphragms simultaneously; or,

[0008] First cut the outer diaphragm, then cut the inner diaphragm; or,

[0009] First, cut the inner diaphragm, then cut the outer diaphragm.

[0010] In one alternative embodiment, the outer diaphragm and the inner diaphragm are cut simultaneously or sequentially using the same cutting structure; or,

[0011] The outer diaphragm and the inner diaphragm are cut simultaneously or sequentially by a cutting structure.

[0012] In one alternative embodiment, before cutting the outer diaphragm and the inner diaphragm, at the cutting position, the outer diaphragm and the inner diaphragm are either attached together or separated with a predetermined spacing.

[0013] In one alternative embodiment, before the outer diaphragm and the inner diaphragm are cut, at the cut position, the outer diaphragm and the inner diaphragm are separated by a predetermined spacing.

[0014] The outer diaphragm and the inner diaphragm are cut simultaneously or sequentially using the same cutting structure;

[0015] The cutting structure moves horizontally or at a predetermined angle to the horizontal.

[0016] In one alternative embodiment, before the outer diaphragm and the inner diaphragm are cut, at the cut position, the outer diaphragm and the inner diaphragm are separated by a predetermined spacing.

[0017] The outer diaphragm and the inner diaphragm are cut simultaneously or sequentially by a cutting structure;

[0018] The two cutting structures are located at the same height; or, the two cutting structures are located at different heights.

[0019] In one optional embodiment, the outer diaphragm and the inner diaphragm are cut simultaneously or sequentially using the same cutting structure, including:

[0020] The cutting structure is located on the outside of the outer diaphragm, and moves inward to cut the outer and inner diaphragms; or,

[0021] The cutting structure is located on the inner side of the inner diaphragm, and moves outward to cut the inner and outer diaphragms.

[0022] In one optional embodiment, the outer diaphragm and the inner diaphragm are cut simultaneously or sequentially by a cutting structure, including:

[0023] The first cutting structure is located on the outside of the outer membrane, and the first cutting structure moves inward to cut the outer membrane.

[0024] The second cutting structure is located on the inner side of the inner diaphragm, and moves outward to cut the inner diaphragm.

[0025] In one alternative embodiment, the second cutting structure is integrated with the unloaded coiling needle; or,

[0026] The second cutting structure is separately configured from the unloaded coiling needle.

[0027] In one alternative embodiment, the feeding speed of the outer diaphragm is greater than that of the inner diaphragm, or the feeding speed of the outer diaphragm is equal to that of the inner diaphragm, or the feeding speed of the outer diaphragm is less than that of the inner diaphragm.

[0028] In one alternative implementation, the cutting structure is a hot-cutting filament or a cutting blade.

[0029] In one optional embodiment, a diaphragm fixing structure is provided on the outside of the outer diaphragm. After the outer diaphragm is cut, the outer diaphragm winding end is fixed by the diaphragm fixing structure.

[0030] In one optional embodiment, the diaphragm fixing structure has a rolling element on the side facing the outer diaphragm, and the rolling element contacts the outer diaphragm; and / or,

[0031] The diaphragm fixing structure is adapted to provide negative pressure to the outer diaphragm to adsorb and fix the outer membrane winding end; and / or,

[0032] The diaphragm fixing structure is adapted to provide positive pressure to the outer diaphragm to blow the outer membrane winding end toward the unloaded winding needle; and / or,

[0033] The diaphragm fixing structure can be fixed or movable.

[0034] In one alternative embodiment, the diaphragm fixing structure is integrated with the cutting structure disposed on the outside of the outer diaphragm.

[0035] In one optional embodiment, after the inner diaphragm is cut, the inner diaphragm winding end is directly adsorbed and fixed using an unloaded needle; and / or,

[0036] The outer film winding end is conveyed toward the unloaded winding needle through a transfer structure, and the unloaded winding needle is used to adsorb and fix the outer film winding end.

[0037] In one alternative embodiment, the outer diaphragm and the inner diaphragm are cut simultaneously, such that the feeding speed of the outer diaphragm is greater than that of the inner diaphragm, and / or the inner diaphragm is pulled back in the opposite direction of the feeding direction.

[0038] In one optional embodiment, the inner diaphragm is fed through an inner membrane feeding structure, and the inner diaphragm is also drawn back through the same inner membrane feeding structure; or,

[0039] The inner diaphragm is fed through an inner membrane feeding structure and then withdrawn through a retraction structure.

[0040] In one optional embodiment, the cutting structure is a cutter, which includes a connecting part, a first cutting edge, and a second cutting edge. The first end of the connecting part is a hinge point, and the second end of the connecting part is connected to both the end of the first cutting edge away from the cutting edge and the end of the second cutting edge away from the cutting edge. The connecting part and the second cutting edge extend in the same direction, and the first cutting edge and the second cutting edge are arranged at a predetermined angle.

[0041] The cutting structure is located on the outside of the outer diaphragm. The first blade cuts through the outer diaphragm, and the cutter rotates at the hinge point to cut through the inner diaphragm via the second blade; or...

[0042] The cutting structure is located on the inner side of the inner diaphragm. The inner diaphragm is cut by the first blade, and the cutter rotates at the hinge point to cut the outer diaphragm by the second blade.

[0043] In one alternative embodiment, the cutting structure is disposed on the outside of the outer diaphragm, and during the rotation of the cutter at the hinge point, the first cutting edge pushes the outer diaphragm winding end outward.

[0044] On the other hand, the present invention provides a diaphragm continuous winding processing apparatus for performing the above-described diaphragm continuous winding processing method.

[0045] The technical solution of this application has the following advantages:

[0046] After cutting the outer and inner diaphragms, the outer diaphragm is made longer than the inner diaphragm, forming a staggered extension. This allows the outer and inner diaphragm winding ends to be staggered on the surface of the unloaded winding needle. The inner diaphragm can be directly adsorbed and fixed by the unloaded winding needle, while the outer diaphragm is directly adsorbed and fixed by the unloaded winding needle through the staggered extension. Therefore, while the outer and inner diaphragms are being fed, the cut outer and inner diaphragms can be adsorbed and fixed by the rotating unloaded winding needle at the winding station, allowing the winding of the next core to continue. This reduces auxiliary time in the core manufacturing process. Throughout the entire process, the inner and outer diaphragms, as well as the unloaded winding needle at the winding station, remain in a continuous state, improving the core processing efficiency. Attached Figure Description

[0047] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the overall structure of a diaphragm continuous winding device according to an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram illustrating the adsorption and fixation of the extension section on an empty roll according to an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the first step in the continuous winding process of the diaphragm according to Embodiment 1 of the present invention;

[0051] Figure 4 This is a schematic diagram of the second step in the continuous winding process of the diaphragm according to Embodiment 1 of the present invention;

[0052] Figure 5 This is a schematic diagram of the third step in the continuous winding process of the diaphragm according to Embodiment 1 of the present invention;

[0053] Figure 6 This is a schematic diagram of the first step in the continuous winding process of the diaphragm according to Embodiment 2 of the present invention;

[0054] Figure 7 This is a schematic diagram of the second step in the continuous winding process of the diaphragm according to Embodiment 2 of the present invention;

[0055] Figure 8 This is a schematic diagram of the third step in the continuous winding process of the diaphragm according to Embodiment 2 of the present invention;

[0056] Figure 9 This is a cutting diagram illustrating the continuous winding process of the diaphragm according to Embodiment 3 of the present invention.

[0057] Figure 10 This is a schematic diagram of the first step in the continuous winding process of the diaphragm according to Embodiment 4 of the present invention;

[0058] Figure 11 This is a schematic diagram of the second step in the continuous winding process of the diaphragm according to Embodiment 4 of the present invention;

[0059] Figure 12 This is a schematic diagram of the third step in the continuous winding process of the diaphragm according to Embodiment 4 of the present invention;

[0060] Figure 13This is a schematic diagram of the first step in the continuous winding process of the diaphragm according to Embodiment 5 of the present invention;

[0061] Figure 14 This is a schematic diagram of the second step in the continuous winding process of the diaphragm according to Embodiment 5 of the present invention;

[0062] Figure 15 This is a schematic diagram of the third step in the continuous winding process of the diaphragm according to Embodiment 5 of the present invention;

[0063] Figure 16 This is a schematic diagram of the rotational changes of the cutting structure in Embodiment 5 of the present invention;

[0064] Figure 17 This is a schematic diagram of the first step in the continuous winding process of the diaphragm according to Embodiment 6 of the present invention;

[0065] Figure 18 This is a schematic diagram of the second step in the continuous winding process of the diaphragm according to Embodiment 6 of the present invention;

[0066] Figure 19 This is a schematic diagram of the third step in the continuous winding process of the diaphragm according to Embodiment 6 of the present invention;

[0067] Figure 20 This is a schematic diagram of the rotational changes of the cutting structure in Embodiment 6 of the present invention;

[0068] Figure 21 This is a cutting diagram illustrating the continuous winding process of the diaphragm according to Embodiment 7 of the present invention.

[0069] Figure 22 This is a cutting diagram illustrating the continuous winding process of the diaphragm according to Embodiment 8 of the present invention;

[0070] Figure 23 This is a cutting diagram illustrating the continuous winding process of the diaphragm according to Embodiment 9 of the present invention;

[0071] Figure 24 This is a cutting diagram illustrating the continuous winding process of the diaphragm in Embodiment 10 of the present invention.

[0072] Figure 25 This is a cutting diagram illustrating the continuous winding process of the diaphragm according to Embodiment 11 of the present invention.

[0073] Figure 26 This is a cutting diagram illustrating the continuous winding process of the diaphragm according to Embodiment 12 of the present invention.

[0074] Figure 27 This is a schematic diagram of the cutting structure moving horizontally in an embodiment of the present invention;

[0075] Figure 28 This is a schematic diagram of the cutting structure moving along a direction having a predetermined angle with the horizontal direction in an embodiment of the present invention, with the moving direction tilting upward from the outside in.

[0076] Figure 29 This is a schematic diagram of the cutting structure moving along a direction having a predetermined angle with the horizontal direction in an embodiment of the present invention, with the moving direction tilting downward from the outside in.

[0077] Explanation of reference numerals in the attached figures:

[0078] 1. Fully loaded winding needle; 2. Unloaded winding needle; 3. Outer diaphragm; 31. Outer diaphragm winding end; 32. Outer diaphragm tail end; 33. Offset extension section; 4. Inner diaphragm; 41. Inner diaphragm winding end; 42. Inner diaphragm tail end; 5. Cutting structure; 51. First cutting structure; 52. Second cutting structure; 53. Connecting part; 54. First cutting edge; 55. Second cutting edge; 56. Hinge point; 6. Diaphragm fixing structure; 7. Transfer structure; 8. Inner diaphragm feeding structure; 9. Retraction structure; 10. Electrode feeding structure. Detailed Implementation

[0079] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0080] The following is combined Figures 1 to 29 The following describes embodiments of the present invention.

[0081] This invention provides a method for continuous winding of a diaphragm, comprising the following steps:

[0082] The fully loaded winding needle 1 is transferred from the winding station to the post-processing station, and drives the outer diaphragm 3 and the inner diaphragm 4 to extend from the winding station to the post-processing station, while the unloaded winding needle 2 moves to the winding station.

[0083] The outer diaphragm 3 and the inner diaphragm 4 are continuously fed, and the fully loaded winding needle 1 and the unloaded winding needle 2 continue to rotate. The outer diaphragm 3 and the inner diaphragm 4 between the winding station and the post-processing station are cut to form an outer membrane winding end 31 on the outer diaphragm 3 and an inner membrane winding end 41 on the inner diaphragm 4. The outer diaphragm 3 and the inner diaphragm 4 are adsorbed and fixed on the unloaded winding needle 2. The inner diaphragm 4 is set close to the unloaded winding needle 2 and is directly adsorbed and fixed on the unloaded winding needle 2. Along the rotation direction of the unloaded winding needle 2, the outer membrane winding end 31 extends beyond the inner membrane winding end 41 to form a staggered extension section 33. The outer diaphragm 3 is adsorbed and fixed to the unloaded winding needle 2 through the staggered extension section 33.

[0084] The continuous winding method for diaphragms of the present invention, after cutting the outer diaphragm 3 and the inner diaphragm 4, makes the outer diaphragm 3 longer than the inner diaphragm 4, that is, the portion of the outer diaphragm 3 longer than the inner diaphragm 4 forms a misaligned extension section 33. Therefore, the outer diaphragm winding end 31 and the inner diaphragm winding end 41 can be misaligned on the surface of the unloaded winding needle 2. The inner diaphragm 4 can be directly adsorbed and fixed by the unloaded winding needle 2, and the outer diaphragm 3 can be directly adsorbed and fixed by the unloaded winding needle 2 through the misaligned extension section 33. Therefore, while the outer diaphragm 3 and the inner diaphragm 4 are being fed, the cut outer diaphragm 3 and the inner diaphragm 4 can be adsorbed and fixed by the unloaded winding needle 2 in a rotating state at the winding station, thereby continuing the winding of the next core, reducing the auxiliary time in the core manufacturing process. Throughout the process, the inner diaphragm 4, the outer diaphragm 3, and the unloaded winding needle 2 at the winding station are all in a non-stop state, improving the processing efficiency of the core.

[0085] It is worth noting that the inner diaphragm 4 refers to the diaphragm closer to the winding needle, while the outer diaphragm 3 refers to the diaphragm further away from the winding needle. Therefore, the inner diaphragm 4 can be directly attached to the winding needle, allowing the vacuum winding needle to directly adsorb and fix the inner diaphragm 4. However, in related technologies, after the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer membrane winding end 31 and the inner membrane winding end 41 are basically aligned. That is, the inner diaphragm 4 is sandwiched between the winding needle and the outer diaphragm 3. This results in the vacuum winding needle's adsorption effect not being directly applied to the outer diaphragm 3, thus preventing the vacuum winding needle from adsorbing and fixing the outer diaphragm 3. Therefore, in related technologies, additional processing methods are used to fix the outer membrane 3 to the inner membrane 4 (for example, using an electrostatic generator to generate static electricity in the outer membrane 3, causing the outer membrane 3 and the inner membrane 4 to attract each other under the action of static electricity), or a pin with an inner clamping needle is used to clamp and fix the outer membrane winding end 31 and the inner membrane winding end 41 (an additional mechanism is needed to insert the outer membrane winding end 31 and the inner membrane winding end 41 into the inner clamping needle). Both of these methods will make the overall structure of the winding device more complex, the processing process more cumbersome, and the processing efficiency lower.

[0086] In embodiments of the present invention, only the diaphragm cutting process or the diaphragm feeding speed needs to be controlled to allow the outer membrane winding end 31 to extend beyond the inner membrane winding end 41 (see [reference]). Figure 2 Thus, under the adsorption of the winding needle, both the outer diaphragm 3 and the inner diaphragm 4 can be directly adsorbed and fixed, simplifying the overall structure of the winding device and the processing steps, and improving processing efficiency.

[0087] It should be noted that after the outer diaphragm 3 is cut, an outer membrane winding end 31 and an outer membrane tail end 32 will be formed at the cut point of the outer diaphragm 3. The outer membrane winding end 31 serves as the beginning end of the outer diaphragm 3 on the unloaded winding needle 2, and the outer membrane tail end 32 serves as the end end of the outer diaphragm 3 on the fully loaded winding needle 1. After the inner diaphragm 4 is cut, an inner membrane winding end 41 and an inner membrane tail end 42 will be formed at the cut point of the inner diaphragm 4. The inner membrane winding end 41 serves as the beginning end of the inner diaphragm 4 on the unloaded winding needle 2, and the inner membrane tail end 42 serves as the end end of the inner diaphragm 4 on the fully loaded winding needle 1.

[0088] The following describes various embodiments of the continuous winding process for diaphragms.

[0089] Example 1

[0090] like Figures 3 to 5 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut successively by the same cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0091] Furthermore, in this embodiment, the outer diaphragm 3 is cut first, and then the inner diaphragm 4 is cut. Specifically, the cutting structure 5 is disposed on the outside of the outer diaphragm 3, and the cutting structure 5 moves inward to cut the outer diaphragm 3 and the inner diaphragm 4.

[0092] In this embodiment, the feeding speed of the outer diaphragm 3 is v1, and the feeding speed of the inner diaphragm 4 is v2. After the outer diaphragm 3 is cut, the cutting structure 5 reaches the inner diaphragm 4 after a time of Δt1 and cuts the inner diaphragm 4. The outer diaphragm 3 continues to be fed at a speed of v1. Therefore, the outer diaphragm 3 will have a redundancy of length v1×Δt1, and the outer diaphragm 3 can have a longer feeding length relative to the inner diaphragm 4, so that the outer membrane winding end 31 and the inner membrane winding end 41 are misaligned and a misaligned extension section 33 is formed in the outer diaphragm 3.

[0093] It is worth noting that, in this embodiment, as Figure 27 As shown, the cutting structure 5 moves in the horizontal direction.

[0094] Of course, as alternative implementation methods, such as Figure 28 As shown, the cutting structure 5 can also move along a direction with a predetermined angle to the horizontal direction, and the moving direction of the cutting structure 5 is inclined upward from the outside to the inside, so as to ensure that the misaligned extension segment 33 has sufficient length.

[0095] It is understandable that, such as Figure 29As shown, the cutting structure 5 can also be moved along a direction with a predetermined angle to the horizontal direction, and the moving direction of the cutting structure 5 is tilted downward from the outside to the inside. At this time, the redundant length formed by the outer diaphragm 3 is needed to compensate for the height difference caused by the tilt of the cutting structure 5.

[0096] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0097] In this embodiment, a diaphragm fixing structure 6 is provided on the outside of the outer diaphragm 3. After the outer diaphragm 3 is cut, the outer diaphragm winding end 31 is fixed by the diaphragm fixing structure 6. This arrangement prevents the outer diaphragm 3, which is continuously being transported after cutting, from being in a free state and moving arbitrarily, thereby avoiding any impact on the processing.

[0098] Furthermore, in this embodiment, the diaphragm fixing structure 6 is adapted to provide negative pressure to the outer diaphragm 3 to adsorb and fix the outer membrane winding end 31.

[0099] Of course, in other alternative embodiments, the diaphragm fixing structure 6 can also be a clamping fixing structure or other structure capable of fixing the diaphragm.

[0100] It should be noted that the diaphragm fixing structure 6 can be fixed, that is, fixed at a predetermined position, making it simpler and easier to set up. Alternatively, the diaphragm fixing structure 6 can be movable. Specifically, before cutting the outer diaphragm 3, the diaphragm fixing structure 6 can be positioned far from the outer diaphragm 3 to avoid interference with the feeding process of the outer diaphragm 3. When it is necessary to fix the outer diaphragm winding end 31, the diaphragm fixing structure 6 can be brought close to the outer diaphragm 3 and fixed thereon. Optionally, after the outer diaphragm 3 is cut, the diaphragm fixing structure 6 can move the outer diaphragm 3 towards the unloaded winding needle 2, ensuring that after the inner diaphragm 4 is cut and adsorbed, the outer diaphragm 3 can be positioned as close as possible to the unloaded winding needle 2, thus facilitating the adsorption and fixing of the misaligned extension section 33 of the outer diaphragm 3 by the unloaded winding needle 2.

[0101] Optionally, a rolling element is provided on the side of the diaphragm fixing structure 6 facing the outer diaphragm 3, and the rolling element contacts the outer diaphragm 3. Therefore, the friction between the outer diaphragm 3 and the diaphragm fixing structure 6 is made into rolling friction, reducing the friction between the outer diaphragm 3 and the diaphragm fixing structure 6 and avoiding damage to the diaphragm. By providing the rolling element, the diaphragm fixing structure 6 can be pre-positioned on the feeding path of the outer diaphragm 3, ensuring that the outer membrane winding end 31 is immediately fixed by the diaphragm fixing structure 6 after the outer diaphragm 3 is cut.

[0102] Furthermore, the diaphragm fixing structure 6 can be integrated with the cutting structure 5 located on the outside of the outer diaphragm 3. This allows the diaphragm fixing structure 6 to move synchronously during the cutting process of the cutting structure 5, achieving an integrated cutting and feeding design for the outer diaphragm 3.

[0103] In this embodiment, after the inner diaphragm 4 is cut, the inner diaphragm winding end 41 is directly adsorbed and fixed by the unloaded winding needle 2. Therefore, the inner diaphragm 4 is adsorbed and fixed by the unloaded winding needle 2 almost simultaneously when it is cut. Thus, the redundant length of v1×Δt1 generated by the outer diaphragm 3 is basically the length of the misaligned extension segment 33. That is, the feeding speed v1 of the outer diaphragm 3 and the feeding speed v2 of the inner diaphragm 4 can satisfy v1>v2, or v1=v2, or v1<v2.

[0104] It is worth noting that during the inner diaphragm 4 transport process, the unloaded coil needle 2 can continuously provide negative pressure adsorption force so that when the inner diaphragm 4 is cut, the inner membrane winding end 41 can be directly and immediately adsorbed and fixed by the unloaded coil needle 2.

[0105] In this embodiment, the outer membrane winding end 31 is conveyed toward the unloaded winding needle 2 by the transfer structure 7, and the unloaded winding needle 2 adsorbs and fixes the outer membrane winding end 31.

[0106] It is worth noting that during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. If the transfer structure 7 needs a time of Δt2 to complete the transfer and transport of the outer membrane winding end 31, in order to ensure that the outer membrane winding end 31 extends beyond the inner membrane winding end 41 along the rotation direction of the empty winding needle 2, it is necessary to make v1×Δt1>v2×Δt2.

[0107] It should be further explained that if the outer diaphragm 3 is moved synchronously towards the empty coil needle 2 after the outer diaphragm 3 is cut by the diaphragm fixing structure 6 or the transfer structure 7, the outer diaphragm 3 can reach a position closer to the empty coil needle 2 in advance. Therefore, to a certain extent, it is not necessary to consider the predetermined distance between the outer diaphragm 3 and the inner diaphragm 4 at the cutting position (that is, the above-mentioned △t2 will be very small and can be ignored).

[0108] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0109] It is worth noting that the diaphragm fixing structure 6 can also be adapted to provide positive pressure to the outer diaphragm 3 to blow the outer membrane winding end 31 toward the unloaded winding needle 2. That is, the transfer and adsorption fixing of the outer diaphragm 3 can be achieved by the combined action of the positive pressure of the air knife and the diaphragm fixing structure 6, or by the positive pressure of the air knife / diaphragm fixing structure 6 alone (that is, the diaphragm fixing structure 6 can be used as a transfer structure 7), combined with the negative pressure adsorption of the unloaded winding needle 2.

[0110] It should be noted that the positive pressure applied to the outer diaphragm 3 by the air knife and diaphragm fixing structure 6 also has a smoothing effect on the outer diaphragm 3; of course, an additional smoothing structure can also be set on the air knife and diaphragm fixing structure 6 to smooth the outer diaphragm 3 during the conveying process, so that the diaphragm can be adsorbed on the outside of the vacuum winding needle.

[0111] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0112] It is worth noting that the diaphragm fixing structure 6 and the transfer structure 7 can be integrated, or they can be set up independently.

[0113] Example 2

[0114] like Figures 6 to 8 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut successively by a cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0115] In this embodiment, the first cutting structure 51 is disposed on the outer side of the outer diaphragm 3, and moves inward to cut the outer diaphragm 3; the second cutting structure 52 is disposed on the inner side of the inner diaphragm 4, and moves outward to cut the inner diaphragm 4. That is, the first cutting structure 51 is first used to cut the outer diaphragm 3 on the outer side, and then the second cutting structure 52 is used to cut the inner diaphragm 4 on the inner side.

[0116] It is worth noting that the second cutting structure 52 is integrated with the unloaded winding needle 2. Specifically, the second cutting structure 52 is retractably installed inside the winding needle. When it is necessary to cut the inner diaphragm 4, the second cutting structure 52 extends out from inside the winding needle, and after the cutting is completed, it retracts back into the winding needle.

[0117] Of course, in other alternative embodiments, the second cutting structure 52 can be separated from the unloaded coil needle 2. That is, the second cutting structure 52 and the coil needle are not connected, and both the second cutting structure 52 and the coil needle are independently set.

[0118] In this embodiment, the feeding speed of the outer diaphragm 3 is v1, and the feeding speed of the inner diaphragm 4 is v2. After the outer diaphragm 3 is cut by the first cutting structure 51, the inner diaphragm 4 is cut by the second cutting structure 52 after a time interval of Δt1. The outer diaphragm 3 continues to be fed at a speed of v1. Therefore, the outer diaphragm 3 will have a redundancy of length v1×Δt1, and the outer diaphragm 3 can have a longer feeding length relative to the inner diaphragm 4, so that the outer membrane winding end 31 and the inner membrane winding end 41 are misaligned and a misaligned extension section 33 is formed on the outer diaphragm 3.

[0119] It is worth noting that in this embodiment, the first cutting structure 51 and the second cutting structure 52 are located at the same position and height.

[0120] Of course, as an alternative implementation, the position height of the first cutting structure 51 can be lower than the position height of the second cutting structure 52, thereby ensuring that the misaligned extension segment 33 has sufficient length.

[0121] It is understandable that the position height of the first cutting structure 51 can be higher than that of the second cutting structure 52. In this case, the redundant length formed by the outer diaphragm 3 needs to compensate for the height difference between the second cutting structure 52 and the first cutting structure 51.

[0122] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0123] In this embodiment, a diaphragm fixing structure 6 is provided on the outside of the outer diaphragm 3. After the outer diaphragm 3 is cut, the outer diaphragm winding end 31 is fixed by the diaphragm fixing structure 6. This arrangement prevents the outer diaphragm 3, which is continuously being transported after cutting, from being in a free state and moving arbitrarily, thereby avoiding any impact on the processing.

[0124] Furthermore, in this embodiment, the diaphragm fixing structure 6 is adapted to provide negative pressure to the outer diaphragm 3 to adsorb and fix the outer diaphragm winding end 31.

[0125] Of course, in other alternative embodiments, the diaphragm fixing structure 6 can also be a clamping fixing structure or other structure capable of fixing the diaphragm.

[0126] It should be noted that the diaphragm fixing structure 6 can be fixed, that is, fixed at a predetermined position, making it simpler and easier to set up. Alternatively, the diaphragm fixing structure 6 can be movable. Specifically, before cutting the outer diaphragm 3, the diaphragm fixing structure 6 can be positioned far from the outer diaphragm 3 to avoid interference with the feeding process of the outer diaphragm 3. When it is necessary to fix the outer diaphragm winding end 31, the diaphragm fixing structure 6 can be brought close to the outer diaphragm 3 and fixed thereon. Optionally, after the outer diaphragm 3 is cut, the diaphragm fixing structure 6 can move the outer diaphragm 3 towards the unloaded winding needle 2, ensuring that after the inner diaphragm 4 is cut and adsorbed, the outer diaphragm 3 can be positioned as close as possible to the unloaded winding needle 2, thus facilitating the adsorption and fixing of the misaligned extension section 33 of the outer diaphragm 3 by the unloaded winding needle 2.

[0127] Optionally, a rolling element is provided on the side of the diaphragm fixing structure 6 facing the outer diaphragm 3, and the rolling element contacts the outer diaphragm 3. Therefore, the friction between the outer diaphragm 3 and the diaphragm fixing structure 6 is made into rolling friction, reducing the friction between the outer diaphragm 3 and the diaphragm fixing structure 6 and avoiding damage to the diaphragm. By providing the rolling element, the diaphragm fixing structure 6 can be pre-positioned on the feeding path of the outer diaphragm 3, ensuring that the outer membrane winding end 31 is immediately fixed by the diaphragm fixing structure 6 after the outer diaphragm 3 is cut.

[0128] Furthermore, the diaphragm fixing structure 6 can be integrated with the cutting structure 5 (the first cutting structure 51 in this embodiment) disposed on the outside of the outer diaphragm 3. This allows the diaphragm fixing structure 6 to move synchronously during the cutting process of the cutting structure 5, achieving an integrated cutting and feeding design for the outer diaphragm 3.

[0129] In this embodiment, after the inner diaphragm 4 is cut, the inner diaphragm winding end 41 is directly adsorbed and fixed by the unloaded winding needle 2. Therefore, the inner diaphragm 4 is adsorbed and fixed by the unloaded winding needle 2 almost simultaneously when it is cut. Thus, the redundant length of v1×Δt1 generated by the outer diaphragm 3 is basically the length of the misaligned extension segment 33. That is, the feeding speed v1 of the outer diaphragm 3 and the feeding speed v2 of the inner diaphragm 4 can satisfy v1>v2, or v1=v2, or v1<v2.

[0130] It is worth noting that during the inner diaphragm 4 transport process, the unloaded coil needle 2 can continuously provide negative pressure adsorption force so that when the inner diaphragm 4 is cut, the inner membrane winding end 41 can be directly and immediately adsorbed and fixed by the unloaded coil needle 2.

[0131] In this embodiment, the outer membrane winding end 31 is conveyed toward the unloaded winding needle 2 by the transfer structure 7, and the unloaded winding needle 2 adsorbs and fixes the outer membrane winding end 31.

[0132] It is worth noting that during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. If the transfer structure 7 needs a time of Δt2 to complete the transfer and transport of the outer membrane winding end 31, in order to ensure that the outer membrane winding end 31 extends beyond the inner membrane winding end 41 along the rotation direction of the empty winding needle 2, it is necessary to make v1×Δt1>v2×Δt2.

[0133] It should be further explained that if the outer diaphragm 3 is moved synchronously towards the empty coil needle 2 after the outer diaphragm 3 is cut by the diaphragm fixing structure 6 or the transfer structure 7, the outer diaphragm 3 can reach a position closer to the empty coil needle 2 in advance. Therefore, to a certain extent, it is not necessary to consider the predetermined distance between the outer diaphragm 3 and the inner diaphragm 4 at the cutting position (that is, the above-mentioned △t2 will be very small and can be ignored).

[0134] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0135] It is worth noting that the diaphragm fixing structure 6 can also be adapted to provide positive pressure to the outer diaphragm 3 to blow the outer membrane winding end 31 toward the unloaded winding needle 2. That is, the transfer and adsorption fixing of the outer diaphragm 3 can be achieved by the combined action of the positive pressure of the air knife and the diaphragm fixing structure 6, or by the positive pressure of the air knife / diaphragm fixing structure 6 alone (that is, the diaphragm fixing structure 6 can be used as a transfer structure 7), combined with the negative pressure adsorption of the unloaded winding needle 2.

[0136] It should be noted that the positive pressure applied to the outer diaphragm 3 by the air knife and diaphragm fixing structure 6 also has a smoothing effect on the outer diaphragm 3; of course, an additional smoothing structure can also be set on the air knife and diaphragm fixing structure 6 to smooth the outer diaphragm 3 during the conveying process, so that the diaphragm can be adsorbed on the outside of the vacuum winding needle.

[0137] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0138] It is worth noting that the diaphragm fixing structure 6 and the transfer structure 7 can be integrated, or they can be set up independently.

[0139] Example 3

[0140] like Figure 9 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut successively by the same cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0141] Furthermore, in this embodiment, the inner diaphragm 4 is cut first, and then the outer diaphragm 3 is cut. Specifically, the cutting structure 5 is disposed on the inner side of the inner diaphragm 4, and the cutting structure 5 moves outward to cut the inner diaphragm 4 and the outer diaphragm 3.

[0142] In this embodiment, the cutting structure 5 moves along a direction having a predetermined angle with the horizontal direction, and the moving direction of the cutting structure 5 is inclined downward from the inside out. Therefore, by utilizing the height difference generated by the inclination of the cutting structure 5, a misaligned extension segment 33 can be formed on the outer diaphragm 3.

[0143] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0144] In this embodiment, after the inner membrane 4 is cut, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2, and the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0145] It is worth noting that during the inner diaphragm 4 transport process, the unloaded coil needle 2 can continuously provide negative pressure adsorption force so that when the inner diaphragm 4 is cut, the inner membrane winding end 41 can be directly and immediately adsorbed and fixed by the unloaded coil needle 2.

[0146] In this embodiment, the feeding speed v1 of the outer diaphragm 3 and the feeding speed v2 of the inner diaphragm 4 can satisfy v1 > v2, v1 = v2, or v1 < v2.

[0147] It is worth noting that after the inner diaphragm 4 is cut, the cutting structure 5 reaches the outer diaphragm 3 after a time of Δt1 and cuts the outer diaphragm 3. Furthermore, during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner diaphragm 4 to wind a certain length along the winding direction. If the transfer structure 7 requires a time of Δt2 to complete the transfer and transport of the outer membrane winding end 31, in order to ensure that the outer membrane winding end 31 extends beyond the inner membrane winding end 41 along the rotation direction of the empty winding needle 2, the height difference generated by the tilt of the cutting structure 5 needs to be greater than v2×(Δt1+Δt2).

[0148] It should be further explained that if the outer diaphragm 3 (which has not yet been cut) is transported close to the cutting structure 5 by the transfer structure 7 after the inner diaphragm 4 is cut, the moving time of the cutting structure 5 can be shortened, which means that Δt1 is reduced.

[0149] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0150] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0151] Example 4

[0152] like Figures 10 to 12 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut successively by a cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0153] In this embodiment, the second cutting structure 52 is disposed on the inner side of the inner diaphragm 4, and moves outward to cut the inner diaphragm 4; the first cutting structure 51 is disposed on the outer side of the outer diaphragm 3, and moves inward to cut the outer diaphragm 3. That is, the second cutting structure 52 is first used to cut the inner diaphragm 4 on the inner side, and then the first cutting structure 51 is used to cut the outer diaphragm 3 on the outer side.

[0154] Furthermore, in this embodiment, the position height of the first cutting structure 51 is lower than the position height of the second cutting structure 52. Therefore, by utilizing the height difference between the first cutting structure 51 and the second cutting structure 52, a misaligned extension segment 33 can be formed on the outer diaphragm 3.

[0155] It is worth noting that the second cutting structure 52 is integrated with the unloaded winding needle 2. Specifically, the second cutting structure 52 is retractably installed inside the winding needle. When it is necessary to cut the inner diaphragm 4, the second cutting structure 52 extends out from inside the winding needle, and after the cutting is completed, it retracts back into the winding needle.

[0156] Of course, in other alternative embodiments, the second cutting structure 52 can be separated from the unloaded coil needle 2. That is, the second cutting structure 52 and the coil needle are not connected, and both the second cutting structure 52 and the coil needle are independently set.

[0157] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0158] In this embodiment, after the inner membrane 4 is cut, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2, and the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0159] It is worth noting that during the inner diaphragm 4 transport process, the unloaded coil needle 2 can continuously provide negative pressure adsorption force so that when the inner diaphragm 4 is cut, the inner membrane winding end 41 can be directly and immediately adsorbed and fixed by the unloaded coil needle 2.

[0160] In this embodiment, the feeding speed v1 of the outer diaphragm 3 and the feeding speed v2 of the inner diaphragm 4 can satisfy v1 > v2, v1 = v2, or v1 < v2.

[0161] It is worth noting that the time difference between the first cutting structure 51 cutting the outer membrane 3 and the second cutting structure 52 cutting the inner membrane 4 is Δt1. Furthermore, during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. If the transfer structure 7 needs Δt2 time to complete the transfer and transport of the outer membrane winding end 31, in order to ensure that the outer membrane winding end 31 extends beyond the inner membrane winding end 41 along the rotation direction of the empty winding needle 2, the height difference between the first cutting structure 51 and the second cutting structure 52 needs to be greater than v2 × (Δt1 Δt2).

[0162] Of course, preferably, the first cutting structure 51 should cut the outer diaphragm 3 immediately after the second cutting structure 52 cuts the inner diaphragm 4, so as to minimize Δt1.

[0163] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0164] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0165] Example 5

[0166] like Figures 13 to 16 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut successively by the same cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0167] Furthermore, in this embodiment, the outer diaphragm 3 is cut first, and then the inner diaphragm 4 is cut.

[0168] In this embodiment, the cutting structure 5 is a cutter, which includes a connecting part 53, a first cutting edge 54 and a second cutting edge 55. The first end of the connecting part 53 is a hinge point 56, and the second end of the connecting part 53 is connected to the end of the first cutting edge 54 away from the cutting edge and the end of the second cutting edge 55 away from the cutting edge. The connecting part 53 and the second cutting edge 55 extend in the same direction, and the first cutting edge 54 and the second cutting edge 55 are arranged at a predetermined included angle.

[0169] Furthermore, the cutting structure 5 is located on the outside of the outer diaphragm 3. The outer diaphragm 3 is cut by the first blade 54, and the cutter rotates at the hinge point 56 to cut the inner diaphragm 4 by the second blade 55.

[0170] It is worth noting that since the connecting part 53 and the second blade 55 extend in the same direction, when the second blade 55 is used to cut the inner diaphragm 4, the length of the connecting part 53 compensates for the predetermined distance between the outer diaphragm 3 and the inner diaphragm 4, thereby achieving the cutting of the inner diaphragm 4.

[0171] Furthermore, in this embodiment, the first cutting edge 54 and the second cutting edge 55 are arranged vertically. When the first cutting edge 54 cuts the outer diaphragm 3, the connecting portion 53 is arranged in the vertical direction; when the second cutting edge 55 cuts the inner diaphragm 4, the connecting portion 53 is arranged in the horizontal direction.

[0172] It should be noted that during the rotation of the cutter at the hinge point 56, the outer membrane winding end 31 is pushed outward by the first cutting edge 54. That is, after the first cutting edge 54 cuts the outer membrane 3 in the horizontal direction, the cutter rotates at the hinge point 56 and the first cutting edge 54 rotates upward.

[0173] In this embodiment, the feeding speed of the outer diaphragm 3 is v1, and the feeding speed of the inner diaphragm 4 is v2. After the first blade 54 cuts the outer diaphragm 3, under the rotation of the cutting structure 5, the second blade 55 cuts the inner diaphragm 4 at the inner diaphragm 4 after a time of Δt1. The outer diaphragm 3 continues to be fed at a speed of v1. Therefore, the outer diaphragm 3 will have a redundancy of length v1×Δt1, and the outer diaphragm 3 can have a longer feeding length relative to the inner diaphragm 4. At the same time, due to the rotation of the cutter at the hinge point 56, the position height of the cutting point of the second blade 55 is increased by a distance L of the length of the connecting part 53 compared to the position height of the cutting point of the first blade 54. This causes the outer film winding end 31 and the inner film winding end 41 to be misaligned, forming a misaligned extension section 33 with a length of L+v1×Δt1 on the outer diaphragm 3.

[0174] In this embodiment, a diaphragm fixing structure 6 is provided on the outside of the outer diaphragm 3. After the outer diaphragm 3 is cut, the outer diaphragm winding end 31 is fixed by the diaphragm fixing structure 6. This arrangement prevents the outer diaphragm 3, which is continuously being transported after cutting, from being in a free state and moving arbitrarily, thereby avoiding any impact on the processing.

[0175] Furthermore, in this embodiment, the diaphragm fixing structure 6 is adapted to provide negative pressure to the outer diaphragm 3 to adsorb and fix the outer diaphragm winding end 31.

[0176] Of course, in other alternative embodiments, the diaphragm fixing structure 6 can also be a clamping fixing structure or other structure capable of fixing the diaphragm.

[0177] It should be noted that the diaphragm fixing structure 6 can be fixed, that is, fixed at a predetermined position, making it simpler and easier to set up. Alternatively, the diaphragm fixing structure 6 can be movable. Specifically, before cutting the outer diaphragm 3, the diaphragm fixing structure 6 can be positioned far from the outer diaphragm 3 to avoid interference with the feeding process of the outer diaphragm 3. When it is necessary to fix the outer diaphragm winding end 31, the diaphragm fixing structure 6 can be brought close to the outer diaphragm 3 and fixed thereon. Optionally, after the outer diaphragm 3 is cut, the diaphragm fixing structure 6 can move the outer diaphragm 3 towards the unloaded winding needle 2, ensuring that after the inner diaphragm 4 is cut and adsorbed, the outer diaphragm 3 can be positioned as close as possible to the unloaded winding needle 2, thus facilitating the adsorption and fixing of the misaligned extension section 33 of the outer diaphragm 3 by the unloaded winding needle 2.

[0178] Optionally, a rolling element is provided on the side of the diaphragm fixing structure 6 facing the outer diaphragm 3, and the rolling element contacts the outer diaphragm 3. Therefore, the friction between the outer diaphragm 3 and the diaphragm fixing structure 6 is made into rolling friction, reducing the friction between the outer diaphragm 3 and the diaphragm fixing structure 6 and avoiding damage to the diaphragm. By providing the rolling element, the diaphragm fixing structure 6 can be pre-positioned on the feeding path of the outer diaphragm 3, ensuring that the outer membrane winding end 31 is immediately fixed by the diaphragm fixing structure 6 after the outer diaphragm 3 is cut.

[0179] In this embodiment, after the inner diaphragm 4 is cut, the inner diaphragm winding end 41 is directly adsorbed and fixed by the unloaded winding needle 2. Therefore, the inner diaphragm 4 is adsorbed and fixed by the unloaded winding needle 2 almost simultaneously when it is cut. Thus, the redundant length L+v1×△t1 generated by the outer diaphragm 3 is basically the length of the misaligned extension segment 33. That is, the feeding speed v1 of the outer diaphragm 3 and the feeding speed v2 of the inner diaphragm 4 can satisfy v1>v2, or v1=v2, or v1<v2.

[0180] It is worth noting that during the inner diaphragm 4 transport process, the unloaded coil needle 2 can continuously provide negative pressure adsorption force so that when the inner diaphragm 4 is cut, the inner membrane winding end 41 can be directly and immediately adsorbed and fixed by the unloaded coil needle 2.

[0181] In this embodiment, the outer membrane winding end 31 is conveyed toward the unloaded winding needle 2 by the transfer structure 7, and the unloaded winding needle 2 adsorbs and fixes the outer membrane winding end 31.

[0182] It is worth noting that during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. If the transfer structure 7 needs a time of Δt2 to complete the transfer and transport of the outer membrane winding end 31, in order to ensure that the outer membrane winding end 31 extends beyond the inner membrane winding end 41 along the rotation direction of the empty winding needle 2, it is necessary to make L+v1×Δt1>v2×Δt2.

[0183] It should be further explained that if the outer diaphragm 3 is moved synchronously towards the empty winding needle 2 after the outer diaphragm 3 is cut by the diaphragm fixing structure 6 or the transfer structure 7, the outer diaphragm 3 can reach a position closer to the empty winding needle 2 in advance. Therefore, to a certain extent, it is not necessary to consider the predetermined distance between the outer diaphragm 3 and the inner diaphragm 4 at the cutting position (that is, the above-mentioned △t2 will be very small and can be ignored).

[0184] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0185] It is worth noting that the diaphragm fixing structure 6 can also be adapted to provide positive pressure to the outer diaphragm 3 to blow the outer membrane winding end 31 toward the unloaded winding needle 2. That is, the transfer and adsorption fixing of the outer diaphragm 3 can be achieved by the combined action of the positive pressure of the air knife and the diaphragm fixing structure 6, or by the positive pressure of the air knife / diaphragm fixing structure 6 alone (that is, the diaphragm fixing structure 6 can be used as a transfer structure 7), combined with the negative pressure adsorption of the unloaded winding needle 2.

[0186] It should be noted that the positive pressure applied to the outer diaphragm 3 by the air knife and diaphragm fixing structure 6 also has a smoothing effect on the outer diaphragm 3; of course, an additional smoothing structure can also be set on the air knife and diaphragm fixing structure 6 to smooth the outer diaphragm 3 during the conveying process, so that the diaphragm can be adsorbed on the outside of the vacuum winding needle.

[0187] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0188] It is worth noting that the diaphragm fixing structure 6 and the transfer structure 7 can be integrated, or they can be set up independently.

[0189] Example 6

[0190] like Figures 17 to 20 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut successively by the same cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0191] Furthermore, in this embodiment, the inner diaphragm 4 is cut first, and then the outer diaphragm 3 is cut.

[0192] In this embodiment, the cutting structure 5 is a cutter, which includes a connecting part 53, a first cutting edge 54 and a second cutting edge 55. The first end of the connecting part 53 is a hinge point 56, and the second end of the connecting part 53 is connected to the end of the first cutting edge 54 away from the cutting edge and the end of the second cutting edge 55 away from the cutting edge. The connecting part 53 and the second cutting edge 55 extend in the same direction, and the first cutting edge 54 and the second cutting edge 55 are arranged at a predetermined included angle.

[0193] Furthermore, the cutting structure 5 is located inside the inner diaphragm 4. The inner diaphragm 4 is cut by the first blade 54, and the cutter rotates at the hinge point 56 to cut the outer diaphragm 3 by the second blade 55.

[0194] It is worth noting that since the connecting part 53 and the second blade 55 extend in the same direction, when the second blade 55 is used to cut the inner diaphragm 4, the length of the connecting part 53 compensates for the predetermined distance between the outer diaphragm 3 and the inner diaphragm 4, thereby achieving the cutting of the inner diaphragm 4.

[0195] Furthermore, in this embodiment, the first cutting edge 54 and the second cutting edge 55 are arranged vertically. When the first cutting edge 54 cuts the outer diaphragm 3, the connecting portion 53 is arranged in the vertical direction; when the second cutting edge 55 cuts the inner diaphragm 4, the connecting portion 53 is arranged in the horizontal direction.

[0196] In this embodiment, after the first blade 54 cuts the inner diaphragm 4 in the horizontal direction, the cutter rotates at the hinge point 56 and the first blade 54 rotates downward. Therefore, the position height of the cutting point of the second blade 55 is reduced by the length L of the connecting portion 53 compared to the position height of the cutting point of the first blade 54. Thus, the length of the outer diaphragm 3 corresponding to the length of part of the connecting portion 53 can be used as the misaligned extension segment 33.

[0197] It should be noted that since the cutter needs a certain amount of time to rotate at the hinge point 56 to switch the positions of the first cutting edge 54 and the second cutting edge 55, and during this process, the unloaded coiling needle 2 drives the inner diaphragm 4 to wind along the winding direction, the length L of the connecting part 53 minus the length of the inner diaphragm 4 wound by the unloaded coiling needle 2 during the rotation of the cutter is basically the length of the misaligned extension section 33.

[0198] Of course, the length of the misaligned extension section 33 can also be increased by pulling back the inner diaphragm 4 or by further moving the cutting structure 5 to change the cutting point position of the second blade 55.

[0199] In this embodiment, after the inner membrane 4 is cut, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2, and the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0200] In this embodiment, the feeding speed v1 of the outer diaphragm 3 and the feeding speed v2 of the inner diaphragm 4 can satisfy v1 > v2, v1 = v2, or v1 < v2.

[0201] It is worth noting that during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. If the transfer structure 7 needs a time of Δt2 to complete the transfer and transport of the outer membrane winding end 31, in order to ensure that the outer membrane winding end 31 extends beyond the inner membrane winding end 41 along the rotation direction of the empty winding needle 2, the length of the connecting part 53 minus the length of the inner membrane 4 wound by the empty winding needle 2 during the rotation of the cutter is greater than v2×Δt2.

[0202] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0203] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0204] Example 7

[0205] like Figure 21 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously by the same cutting structure 5. Furthermore, before cutting the outer diaphragm 3 and the inner diaphragm 4, the outer diaphragm 3 and the inner diaphragm 4 are attached together at the cutting position.

[0206] In this embodiment, the cutting structure 5 is disposed on the outside of the outer diaphragm 3, and the cutting structure 5 moves inward to cut the outer diaphragm 3 and the inner diaphragm 4.

[0207] Of course, in other alternative embodiments, the cutting structure 5 can also be disposed inside the inner diaphragm 4, and the cutting structure 5 can move outward to cut the inner diaphragm 4 and the outer diaphragm 3.

[0208] Furthermore, in this embodiment, the feeding speed of the outer diaphragm 3 is greater than that of the inner diaphragm 4. Therefore, after the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously, due to the speed difference between the outer diaphragm 3 and the inner diaphragm 4, the outer diaphragm 3 will have a longer feeding length relative to the inner diaphragm 4, so that the outer film winding end 31 and the inner film winding end 41 are misaligned and a misaligned extension section 33 is formed on the outer diaphragm 3.

[0209] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0210] In this embodiment, after the inner membrane 4 is cut, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2; the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0211] It is worth noting that the inner membrane 4 is almost simultaneously adsorbed and fixed by the empty winding needle 2 when it is cut. However, the transfer structure 7 takes a certain amount of time to transfer and transport the outer membrane winding end 31 to the empty winding needle 2 for fixation. Therefore, while the transfer structure 7 is moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. Therefore, the speed difference between the outer membrane 3 and the inner membrane 4 needs to compensate for the length of the inner membrane 4 wound along the winding direction.

[0212] It should be further explained that since the outer diaphragm 3 and the inner diaphragm 4 are attached together and cut at the same time, the outer diaphragm 3 is very close to the unloaded winding needle 2. Therefore, the time required for the outer diaphragm winding end 31 to be transferred and transported to the unloaded winding needle 2 by the transfer structure 7 and fixed by the unloaded winding needle 2 is very short and can be almost ignored.

[0213] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0214] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0215] Example 8

[0216] like Figure 22 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously by the same cutting structure 5. Furthermore, before cutting the outer diaphragm 3 and the inner diaphragm 4, the outer diaphragm 3 and the inner diaphragm 4 are attached together at the cutting position.

[0217] In this embodiment, the cutting structure 5 is disposed on the outside of the outer diaphragm 3, and the cutting structure 5 moves inward to cut the outer diaphragm 3 and the inner diaphragm 4.

[0218] Of course, in other alternative embodiments, the cutting structure 5 can also be disposed inside the inner diaphragm 4, and the cutting structure 5 can move outward to cut the inner diaphragm 4 and the outer diaphragm 3.

[0219] Furthermore, in this embodiment, after cutting the outer diaphragm 3 and the inner diaphragm 4, the inner diaphragm 4 is pulled back in the opposite direction of the feeding direction. Therefore, by pulling back the inner diaphragm 4, the originally aligned outer film winding end 31 and inner film winding end 41 are misaligned, thereby forming a misaligned extension section 33 on the outer diaphragm 3.

[0220] It is worth noting that in this embodiment, the feeding speed of the outer diaphragm 3 can be equal to the feeding speed of the inner diaphragm 4, or the feeding speed of the outer diaphragm 3 can be less than the feeding speed of the inner diaphragm 4. That is, when the feeding speed of the outer diaphragm 3 is equal to or less than the feeding speed of the inner diaphragm 4, it is impossible to form a misaligned extension segment 33 by having the outer diaphragm 3 exceed the inner diaphragm 4 through a feeding speed higher than that of the inner diaphragm 4. Therefore, the inner diaphragm 4 is pulled back to make its length shorter than that of the outer diaphragm 3, thereby forming the misaligned extension segment 33.

[0221] Of course, when the feeding speed of the outer diaphragm 3 is greater than that of the inner diaphragm 4, the inner diaphragm 4 can also be pulled back, so as to ensure that the misaligned extension section 33 has sufficient length.

[0222] In this embodiment, the inner membrane diaphragm 4 is fed and retracted through the inner membrane feeding structure 8. That is, the inner membrane feeding structure 8 can both feed the inner membrane diaphragm 4 in the forward direction and retract it in the reverse direction. The bidirectional movement of the inner membrane diaphragm 4 can be achieved through the inner membrane feeding structure 8, simplifying the overall structure of the winding device.

[0223] For example, the inner membrane feeding structure 8 includes an unwinding roller. Specifically, when the unwinding roller rotates forward, it can unwind the inner membrane 4, thereby realizing the feeding of the inner membrane 4; when the unwinding roller rotates in reverse, it can rewind the inner membrane 4, thereby realizing the retraction of the inner membrane 4.

[0224] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0225] In this embodiment, after the inner membrane 4 is cut and pulled back into place, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2; the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0226] It is worth noting that when the inner diaphragm 4 is retracted into position, it is almost simultaneously adsorbed and fixed by the empty winding needle 2. However, the transfer structure 7 takes a certain amount of time to transfer and transport the outer membrane winding end 31 to the empty winding needle 2 for fixation. Therefore, during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner diaphragm 4 to wind a certain length along the winding direction. Therefore, the retraction length of the inner diaphragm 4 needs to compensate for the length of the inner diaphragm 4 wound along the winding direction.

[0227] It should be further explained that since the outer diaphragm 3 and the inner diaphragm 4 are attached together and cut at the same time, the outer diaphragm 3 is very close to the unloaded winding needle 2. Therefore, the time required for the outer diaphragm winding end 31 to be transferred and transported to the unloaded winding needle 2 by the transfer structure 7 and fixed by the unloaded winding needle 2 is very short and can be almost ignored.

[0228] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0229] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0230] Example 9

[0231] like Figure 23 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously by the same cutting structure 5. Furthermore, before cutting the outer diaphragm 3 and the inner diaphragm 4, the outer diaphragm 3 and the inner diaphragm 4 are attached together at the cutting position.

[0232] In this embodiment, the cutting structure 5 is disposed on the outside of the outer diaphragm 3, and the cutting structure 5 moves inward to cut the outer diaphragm 3 and the inner diaphragm 4.

[0233] Of course, in other alternative embodiments, the cutting structure 5 can also be disposed inside the inner diaphragm 4, and the cutting structure 5 can move outward to cut the inner diaphragm 4 and the outer diaphragm 3.

[0234] Furthermore, in this embodiment, after cutting the outer diaphragm 3 and the inner diaphragm 4, the inner diaphragm 4 is pulled back in the opposite direction of the feeding direction. Therefore, by pulling back the inner diaphragm 4, the originally aligned outer film winding end 31 and inner film winding end 41 are misaligned, thereby forming a misaligned extension section 33 on the outer diaphragm 3.

[0235] It is worth noting that in this embodiment, the feeding speed of the outer diaphragm 3 can be equal to the feeding speed of the inner diaphragm 4, or the feeding speed of the outer diaphragm 3 can be less than the feeding speed of the inner diaphragm 4. That is, when the feeding speed of the outer diaphragm 3 is equal to or less than the feeding speed of the inner diaphragm 4, it is impossible to form a misaligned extension segment 33 by having the outer diaphragm 3 exceed the inner diaphragm 4 through a feeding speed higher than that of the inner diaphragm 4. Therefore, the inner diaphragm 4 is pulled back to make its length shorter than that of the outer diaphragm 3, thereby forming the misaligned extension segment 33.

[0236] Of course, when the feeding speed of the outer diaphragm 3 is greater than that of the inner diaphragm 4, the inner diaphragm 4 can also be pulled back, so as to ensure that the misaligned extension section 33 has sufficient length.

[0237] In this embodiment, the inner membrane diaphragm 4 is fed by the inner membrane feeding structure 8, and the inner membrane diaphragm 4 is pulled back by the retraction structure 9. That is, the inner membrane feeding structure 8 and the retraction structure 9 are independently set. In other words, the inner membrane feeding structure 8 only realizes the feeding function of the inner membrane diaphragm 4, and the retraction structure 9 realizes the reverse retraction of the inner membrane diaphragm 4, which simplifies the working procedure of the inner membrane feeding structure 8 and facilitates control.

[0238] For example, the retraction structure 9 is a buffer structure, which includes a fixed roller and a moving roller. By controlling the movement of the moving roller, the distance between the fixed roller and the moving roller is adjusted, thereby adjusting the buffer length of the inner diaphragm 4. Specifically, when the inner diaphragm 4 needs to be retracted, the moving roller is driven to move away from the fixed roller, increasing the distance between the moving roller and the fixed roller, so that the retracted inner diaphragm 4 is buffered between the moving roller and the fixed roller.

[0239] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0240] In this embodiment, after the inner membrane 4 is cut and pulled back into place, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2; the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0241] It is worth noting that when the inner diaphragm 4 is retracted into position, it is almost simultaneously adsorbed and fixed by the empty winding needle 2. However, the transfer structure 7 takes a certain amount of time to transfer and transport the outer membrane winding end 31 to the empty winding needle 2 for fixation. Therefore, during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner diaphragm 4 to wind a certain length along the winding direction. Therefore, the retraction length of the inner diaphragm 4 needs to compensate for the length of the inner diaphragm 4 wound along the winding direction.

[0242] It should be further explained that since the outer diaphragm 3 and the inner diaphragm 4 are attached together and cut at the same time, the outer diaphragm 3 is very close to the unloaded winding needle 2. Therefore, the time required for the outer diaphragm winding end 31 to be transferred and transported to the unloaded winding needle 2 by the transfer structure 7 and fixed by the unloaded winding needle 2 is very short and can be almost ignored.

[0243] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0244] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0245] Example 10

[0246] like Figure 24 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously by a cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0247] In this embodiment, the first cutting structure 51 is disposed on the outer side of the outer diaphragm 3, and moves inward to cut the outer diaphragm 3; the second cutting structure 52 is disposed on the inner side of the inner diaphragm 4, and moves outward to cut the inner diaphragm 4. That is, the first cutting structure 51 is used to cut the outer diaphragm 3 from the outside, and the second cutting structure 52 is used to cut the inner diaphragm 4 from the inside, so that the outer diaphragm 3 and the inner diaphragm 4 can be cut simultaneously.

[0248] It is worth noting that the second cutting structure 52 is integrated with the unloaded winding needle 2. Specifically, the second cutting structure 52 is retractably installed inside the winding needle. When it is necessary to cut the inner diaphragm 4, the second cutting structure 52 extends out from inside the winding needle, and after the cutting is completed, it retracts back into the winding needle.

[0249] Of course, in other alternative embodiments, the second cutting structure 52 can be separated from the unloaded coil needle 2. That is, the second cutting structure 52 and the coil needle are not connected, and both the second cutting structure 52 and the coil needle are independently set.

[0250] Furthermore, in this embodiment, the feeding speed of the outer diaphragm 3 is greater than that of the inner diaphragm 4. Therefore, after the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously, due to the speed difference between the outer diaphragm 3 and the inner diaphragm 4, the outer diaphragm 3 will have a longer feeding length relative to the inner diaphragm 4, so that the outer film winding end 31 and the inner film winding end 41 are misaligned and a misaligned extension section 33 is formed on the outer diaphragm 3.

[0251] It should be noted that in this embodiment, the first cutting structure 51 and the second cutting structure 52 can be located at the same height. That is, the misaligned extension segment 33 is formed on the outer diaphragm 3 solely by utilizing the velocity difference between the outer diaphragm 3 and the inner diaphragm 4. Alternatively, the height of the first cutting structure 51 can be lower than the height of the second cutting structure 52. Under the combined effect of the velocity difference between the outer diaphragm 3 and the inner diaphragm 4, and the different heights of the first and second cutting structures 51 and 52, the misaligned extension segment 33 is formed on the outer diaphragm 3. It is understood that the height of the first cutting structure 51 can also be higher than the height of the second cutting structure 52. In this case, the outer diaphragm 3 and the inner diaphragm 4 need to have a larger velocity difference to compensate for the height difference between the second cutting structure 52 and the first cutting structure 51.

[0252] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0253] In this embodiment, after the inner membrane 4 is cut, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2; the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0254] It is worth noting that the inner membrane 4 is almost simultaneously adsorbed and fixed by the empty winding needle 2 when it is cut. However, the transfer structure 7 takes a certain amount of time to transfer and transport the outer membrane winding end 31 to the empty winding needle 2 for fixation. Therefore, while the transfer structure 7 is moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. Therefore, the speed difference between the outer membrane 3 and the inner membrane 4 needs to compensate for the length of the inner membrane 4 wound along the winding direction.

[0255] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0256] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0257] Example 11

[0258] like Figure 25 As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously by a cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0259] In this embodiment, the first cutting structure 51 is disposed on the outer side of the outer diaphragm 3, and moves inward to cut the outer diaphragm 3; the second cutting structure 52 is disposed on the inner side of the inner diaphragm 4, and moves outward to cut the inner diaphragm 4. That is, the first cutting structure 51 is used to cut the outer diaphragm 3 from the outside, and the second cutting structure 52 is used to cut the inner diaphragm 4 from the inside, so that the outer diaphragm 3 and the inner diaphragm 4 can be cut simultaneously.

[0260] It is worth noting that the second cutting structure 52 is integrated with the unloaded winding needle 2. Specifically, the second cutting structure 52 is retractably installed inside the winding needle. When it is necessary to cut the inner diaphragm 4, the second cutting structure 52 extends out from inside the winding needle, and after the cutting is completed, it retracts back into the winding needle.

[0261] Of course, in other alternative embodiments, the second cutting structure 52 can be separated from the unloaded coil needle 2. That is, the second cutting structure 52 and the coil needle are not connected, and both the second cutting structure 52 and the coil needle are independently set.

[0262] Furthermore, in this embodiment, after cutting the outer diaphragm 3 and the inner diaphragm 4, the inner diaphragm 4 is pulled back in the opposite direction of the feeding direction. Therefore, by pulling back the inner diaphragm 4, the originally aligned outer film winding end 31 and inner film winding end 41 are misaligned, thereby forming a misaligned extension section 33 on the outer diaphragm 3.

[0263] It is worth noting that in this embodiment, the feeding speed of the outer diaphragm 3 can be equal to the feeding speed of the inner diaphragm 4, or the feeding speed of the outer diaphragm 3 can be less than the feeding speed of the inner diaphragm 4. That is, when the feeding speed of the outer diaphragm 3 is equal to or less than the feeding speed of the inner diaphragm 4, it is impossible to form a misaligned extension segment 33 by having the outer diaphragm 3 exceed the inner diaphragm 4 through a feeding speed higher than that of the inner diaphragm 4. Therefore, the inner diaphragm 4 is pulled back to make its length shorter than that of the outer diaphragm 3, thereby forming the misaligned extension segment 33.

[0264] Of course, when the feeding speed of the outer diaphragm 3 is greater than that of the inner diaphragm 4, the inner diaphragm 4 can also be pulled back, so as to ensure that the misaligned extension section 33 has sufficient length.

[0265] It should be noted that in this embodiment, the first cutting structure 51 and the second cutting structure 52 can be located at the same height. That is, only by retracting the inner diaphragm 4, a misaligned extension segment 33 is formed on the outer diaphragm 3. Alternatively, the height of the first cutting structure 51 can be lower than the height of the second cutting structure 52. Under the combined effect of the retraction of the inner diaphragm 4 and the different heights of the first and second cutting structures 51 and 52, a misaligned extension segment 33 is formed on the outer diaphragm 3. It is understandable that the height of the first cutting structure 51 can also be higher than the height of the second cutting structure 52. In this case, the inner diaphragm 4 needs to be retracted by a greater length to compensate for the height difference between the second cutting structure 52 and the first cutting structure 51.

[0266] In this embodiment, the inner membrane diaphragm 4 is fed and retracted through the inner membrane feeding structure 8. That is, the inner membrane feeding structure 8 can both feed the inner membrane diaphragm 4 in the forward direction and retract it in the reverse direction. The bidirectional movement of the inner membrane diaphragm 4 can be achieved through the inner membrane feeding structure 8, simplifying the overall structure of the winding device.

[0267] For example, the inner membrane feeding structure 8 includes an unwinding roller. Specifically, when the unwinding roller rotates forward, it can unwind the inner membrane 4, thereby realizing the feeding of the inner membrane 4; when the unwinding roller rotates in reverse, it can rewind the inner membrane 4, thereby realizing the retraction of the inner membrane 4.

[0268] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0269] In this embodiment, after the inner membrane 4 is cut and pulled back into place, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2; the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0270] It is worth noting that when the inner diaphragm 4 is retracted into position, it is almost simultaneously adsorbed and fixed by the empty winding needle 2. However, the transfer structure 7 takes a certain amount of time to transfer and transport the outer membrane winding end 31 to the empty winding needle 2 for fixation. Therefore, during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner diaphragm 4 to wind a certain length along the winding direction. Therefore, the retraction length of the inner diaphragm 4 needs to compensate for the length of the inner diaphragm 4 wound along the winding direction.

[0271] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0272] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0273] Example 12

[0274] like Figure 26As shown, in this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously by a cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0275] In this embodiment, the first cutting structure 51 is disposed on the outer side of the outer diaphragm 3, and moves inward to cut the outer diaphragm 3; the second cutting structure 52 is disposed on the inner side of the inner diaphragm 4, and moves outward to cut the inner diaphragm 4. That is, the first cutting structure 51 is used to cut the outer diaphragm 3 from the outside, and the second cutting structure 52 is used to cut the inner diaphragm 4 from the inside, so that the outer diaphragm 3 and the inner diaphragm 4 can be cut simultaneously.

[0276] It is worth noting that the second cutting structure 52 is integrated with the unloaded winding needle 2. Specifically, the second cutting structure 52 is retractably installed inside the winding needle. When it is necessary to cut the inner diaphragm 4, the second cutting structure 52 extends out from inside the winding needle, and after the cutting is completed, it retracts back into the winding needle.

[0277] Of course, in other alternative embodiments, the second cutting structure 52 can be separated from the unloaded coil needle 2. That is, the second cutting structure 52 and the coil needle are not connected, and both the second cutting structure 52 and the coil needle are independently set.

[0278] Furthermore, in this embodiment, after cutting the outer diaphragm 3 and the inner diaphragm 4, the inner diaphragm 4 is pulled back in the opposite direction of the feeding direction. Therefore, by pulling back the inner diaphragm 4, the originally aligned outer film winding end 31 and inner film winding end 41 are misaligned, thereby forming a misaligned extension section 33 on the outer diaphragm 3.

[0279] It is worth noting that in this embodiment, the feeding speed of the outer diaphragm 3 can be equal to the feeding speed of the inner diaphragm 4, or the feeding speed of the outer diaphragm 3 can be less than the feeding speed of the inner diaphragm 4. That is, when the feeding speed of the outer diaphragm 3 is equal to or less than the feeding speed of the inner diaphragm 4, it is impossible to form a misaligned extension segment 33 by having the outer diaphragm 3 exceed the inner diaphragm 4 through a feeding speed higher than that of the inner diaphragm 4. Therefore, the inner diaphragm 4 is pulled back to make its length shorter than that of the outer diaphragm 3, thereby forming the misaligned extension segment 33.

[0280] Of course, when the feeding speed of the outer diaphragm 3 is greater than that of the inner diaphragm 4, the inner diaphragm 4 can also be pulled back, so as to ensure that the misaligned extension section 33 has sufficient length.

[0281] It should be noted that in this embodiment, the first cutting structure 51 and the second cutting structure 52 can be located at the same height. That is, only by retracting the inner diaphragm 4, a misaligned extension segment 33 is formed on the outer diaphragm 3. Alternatively, the height of the first cutting structure 51 can be lower than the height of the second cutting structure 52. Under the combined effect of the retraction of the inner diaphragm 4 and the different heights of the first and second cutting structures 51 and 52, a misaligned extension segment 33 is formed on the outer diaphragm 3. It is understandable that the height of the first cutting structure 51 can also be higher than the height of the second cutting structure 52. In this case, the inner diaphragm 4 needs to be retracted by a greater length to compensate for the height difference between the second cutting structure 52 and the first cutting structure 51.

[0282] In this embodiment, the inner membrane diaphragm 4 is fed by the inner membrane feeding structure 8, and the inner membrane diaphragm 4 is pulled back by the retraction structure 9. That is, the inner membrane feeding structure 8 and the retraction structure 9 are independently set. In other words, the inner membrane feeding structure 8 only realizes the feeding function of the inner membrane diaphragm 4, and the retraction structure 9 realizes the reverse retraction of the inner membrane diaphragm 4, which simplifies the working procedure of the inner membrane feeding structure 8 and facilitates control.

[0283] For example, the retraction structure 9 is a buffer structure, which includes a fixed roller and a moving roller. By controlling the movement of the moving roller, the distance between the fixed roller and the moving roller is adjusted, thereby adjusting the buffer length of the inner diaphragm 4. Specifically, when the inner diaphragm 4 needs to be retracted, the moving roller is driven to move away from the fixed roller, increasing the distance between the moving roller and the fixed roller, so that the retracted inner diaphragm 4 is buffered between the moving roller and the fixed roller.

[0284] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0285] In this embodiment, after the inner membrane 4 is cut and pulled back into place, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2; the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0286] It is worth noting that when the inner diaphragm 4 is retracted into position, it is almost simultaneously adsorbed and fixed by the empty winding needle 2. However, the transfer structure 7 takes a certain amount of time to transfer and transport the outer membrane winding end 31 to the empty winding needle 2 for fixation. Therefore, during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner diaphragm 4 to wind a certain length along the winding direction. Therefore, the retraction length of the inner diaphragm 4 needs to compensate for the length of the inner diaphragm 4 wound along the winding direction.

[0287] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0288] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0289] Example 13

[0290] In this embodiment, the outer diaphragm 3 and the inner diaphragm 4 are cut simultaneously by a cutting structure 5. Before the outer diaphragm 3 and the inner diaphragm 4 are cut, the outer diaphragm 3 and the inner diaphragm 4 are separated by a predetermined distance at the cutting position.

[0291] In this embodiment, the first cutting structure 51 is disposed on the outer side of the outer diaphragm 3, and moves inward to cut the outer diaphragm 3; the second cutting structure 52 is disposed on the inner side of the inner diaphragm 4, and moves outward to cut the inner diaphragm 4. That is, the first cutting structure 51 is used to cut the outer diaphragm 3 from the outside, and the second cutting structure 52 is used to cut the inner diaphragm 4 from the inside, so that the outer diaphragm 3 and the inner diaphragm 4 can be cut simultaneously.

[0292] It is worth noting that the second cutting structure 52 is integrated with the unloaded winding needle 2. Specifically, the second cutting structure 52 is retractably installed inside the winding needle. When it is necessary to cut the inner diaphragm 4, the second cutting structure 52 extends out from inside the winding needle, and after the cutting is completed, it retracts back into the winding needle.

[0293] Of course, in other alternative embodiments, the second cutting structure 52 can be separated from the unloaded coil needle 2. That is, the second cutting structure 52 and the coil needle are not connected, and both the second cutting structure 52 and the coil needle are independently set.

[0294] Furthermore, in this embodiment, the position height of the first cutting structure 51 is lower than the position height of the second cutting structure 52 (see [link]). Figure 24 Therefore, after the outer membrane 3 and the inner membrane 4 are cut, the outer membrane winding end 31 extends beyond the inner membrane winding end 41 and forms a misaligned extension section 33 in the outer membrane 3.

[0295] It is worth noting that in this embodiment, the feeding speed of the outer diaphragm 3 can be equal to the feeding speed of the inner diaphragm 4, or the feeding speed of the outer diaphragm 3 can be less than the feeding speed of the inner diaphragm 4. That is, when the feeding speed of the outer diaphragm 3 is equal to or less than the feeding speed of the inner diaphragm 4, it is impossible to form a misaligned extension segment 33 by having the outer diaphragm 3 exceed the inner diaphragm 4 by having the outer diaphragm 3 have a higher feeding speed than the inner diaphragm 4. Therefore, a scheme in which the first cutting structure 51 and the second cutting structure 52 have different position heights is adopted, so that the length of the inner diaphragm 4 is shorter than the length of the outer diaphragm 3, thereby forming the misaligned extension segment 33.

[0296] Of course, when the feeding speed of the outer diaphragm 3 is greater than that of the inner diaphragm 4, the position height of the first cutting structure 51 can be lower than that of the second cutting structure 52, thereby ensuring that the misaligned extension section 33 has sufficient length.

[0297] In this embodiment, the cutting structure 5 is a hot-cutting wire or a cutting blade. That is, the diaphragm can be cut using either a hot-melt cutting method or a mechanical cutting method.

[0298] In this embodiment, after the inner membrane 4 is cut, the inner membrane winding end 41 is directly adsorbed and fixed by the empty winding needle 2; the outer membrane winding end 31 is transported toward the empty winding needle 2 by the transfer structure 7, and the outer membrane winding end 31 is adsorbed and fixed by the empty winding needle 2.

[0299] It is worth noting that the inner membrane 4 is almost simultaneously adsorbed and fixed by the empty winding needle 2 when it is cut. However, the transfer structure 7 takes a certain amount of time to transfer and transport the outer membrane winding end 31 to the empty winding needle 2 for fixation. Therefore, during the process of the transfer structure 7 moving the outer membrane winding end 31 towards the empty winding needle 2, the empty winding needle 2 has already driven the inner membrane 4 to wind a certain length along the winding direction. Therefore, the height difference between the first cutting structure 51 and the second cutting structure 52 needs to be able to compensate for the length of the inner membrane 4 wound along the winding direction.

[0300] Furthermore, the transfer structure 7 can be an air knife, which is set on the outside of the outer diaphragm 3. The cut outer diaphragm 3 is blown towards the unloaded coiling needle 2 by the air knife, and the misaligned extension section 33 of the outer diaphragm 3 is adsorbed and fixed under the negative pressure of the unloaded coiling needle 2.

[0301] As an alternative implementation, the transfer structure 7 can also be other mechanical structures. For example, the transfer structure 7 can be configured as a movable smoothing roller, smoothing brush or other smoothing structure, so that the smoothing structure can be movably attached to the outer side of the outer diaphragm 3 and drive the outer diaphragm 3 toward the empty winding needle 2 during the movement of the smoothing structure; or, the transfer structure 7 can also be a robot, a movable clamping structure or the like, to transport the outer diaphragm 3 toward the empty winding needle 2.

[0302] The present invention also provides a diaphragm continuous winding processing apparatus for performing the above-described diaphragm continuous winding processing method.

[0303] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for continuous winding of a diaphragm, characterized in that, Including the following steps: The fully loaded winding needle (1) is transferred from the winding station to the post-processing station, and drives the outer diaphragm (3) and inner diaphragm (4) to extend from the winding station to the post-processing station. The unloaded winding needle (2) moves to the winding station. The outer diaphragm (3) and the inner diaphragm (4) are continuously fed, and the fully loaded winding needle (1) and the empty winding needle (2) rotate continuously. The outer diaphragm (3) and the inner diaphragm (4) between the winding station and the post-processing station are cut to form an outer membrane winding end (31) on the outer diaphragm (3) and an inner membrane winding end (41) on the inner diaphragm (4). The outer diaphragm (3) and the inner diaphragm (4) are adsorbed and fixed on the empty winding needle (2). The inner diaphragm (4) is set close to the empty winding needle (2) and directly adsorbed and fixed on the empty winding needle (2). Along the rotation direction of the empty winding needle (2), the outer membrane winding end (31) extends beyond the inner membrane winding end (41) to form a staggered extension section (33). The outer diaphragm (3) is adsorbed and fixed on the empty winding needle (2) through the staggered extension section (33).

2. The continuous winding method for the diaphragm according to claim 1, characterized in that, The cutting of the outer diaphragm (3) and inner diaphragm (4) between the winding station and the post-processing station includes: Cut the outer diaphragm (3) and the inner diaphragm (4) simultaneously; or, First cut the outer diaphragm (3), then cut the inner diaphragm (4); or, First cut the inner diaphragm (4), then cut the outer diaphragm (3).

3. The continuous winding method for the diaphragm according to claim 2, characterized in that, The outer diaphragm (3) and the inner diaphragm (4) are cut simultaneously or sequentially through the same cutting structure (5); or, The outer diaphragm (3) and the inner diaphragm (4) are cut simultaneously or sequentially by a cutting structure (5).

4. The continuous winding method for the diaphragm according to claim 3, characterized in that, Before cutting the outer diaphragm (3) and the inner diaphragm (4), at the cutting position, the outer diaphragm (3) and the inner diaphragm (4) are either attached together or separated with a predetermined spacing.

5. The continuous winding method for the diaphragm according to claim 4, characterized in that, Before the outer diaphragm (3) and the inner diaphragm (4) are cut, at the cut position, the outer diaphragm (3) and the inner diaphragm (4) are separated by a predetermined spacing; The outer diaphragm (3) and the inner diaphragm (4) are cut simultaneously or sequentially through the same cutting structure (5); The cutting structure (5) moves horizontally or at a predetermined angle to the horizontal.

6. The continuous winding method for a diaphragm according to claim 4, characterized in that, Before the outer diaphragm (3) and the inner diaphragm (4) are cut, at the cut position, the outer diaphragm (3) and the inner diaphragm (4) are separated by a predetermined spacing; The outer diaphragm (3) and the inner diaphragm (4) are cut simultaneously or sequentially by a cutting structure (5); The two cutting structures (5) are located at the same position height; or the two cutting structures (5) are located at different position heights.

7. The continuous winding method for the diaphragm according to claim 3, characterized in that, The outer diaphragm (3) and the inner diaphragm (4) are cut simultaneously or sequentially by the same cutting structure (5), including: The cutting structure (5) is located on the outside of the outer diaphragm (3), and the cutting structure (5) moves inward to cut off the outer diaphragm (3) and the inner diaphragm (4); or, The cutting structure (5) is located inside the inner diaphragm (4), and the cutting structure (5) moves outward to cut the inner diaphragm (4) and the outer diaphragm (3).

8. The method for continuous winding of a diaphragm according to claim 3, characterized in that, The outer diaphragm (3) and the inner diaphragm (4) are cut simultaneously or sequentially by a cutting structure (5), including: The first cutting structure (51) is disposed on the outside of the outer diaphragm (3), and the first cutting structure (51) moves inward to cut the outer diaphragm (3); The second cutting structure (52) is disposed on the inner side of the inner diaphragm (4), and the second cutting structure (52) moves outward to cut the inner diaphragm (4).

9. The method for continuous winding of a diaphragm according to claim 8, characterized in that, The second cutting structure (52) is integrated with the unloaded coiling needle (2); or, The second cutting structure (52) is set separately from the empty coiling needle (2).

10. A method for continuous winding of a diaphragm according to any one of claims 1 to 9, characterized in that, The feeding speed of the outer diaphragm (3) is greater than that of the inner diaphragm (4), or the feeding speed of the outer diaphragm (3) is equal to that of the inner diaphragm (4), or the feeding speed of the outer diaphragm (3) is less than that of the inner diaphragm (4).

11. The continuous winding method for a diaphragm according to claim 3, characterized in that, The cutting structure (5) is a hot-cutting filament or a cutting knife.

12. The method for continuous winding of a diaphragm according to any one of claims 1 to 9, characterized in that, A diaphragm fixing structure (6) is provided on the outside of the outer diaphragm (3). After the outer diaphragm (3) is cut, the outer diaphragm winding end (31) is fixed by the diaphragm fixing structure (6).

13. The continuous winding method for a diaphragm according to claim 12, characterized in that, The diaphragm fixing structure (6) has a rolling element on the side facing the outer diaphragm (3), and the rolling element contacts the outer diaphragm (3); and / or, The diaphragm fixing structure (6) is adapted to provide negative pressure to the outer diaphragm (3) to adsorb and fix the outer membrane winding end (31); and / or, The diaphragm fixing structure (6) is adapted to provide positive pressure to the outer diaphragm (3) to blow the outer membrane winding end (31) toward the unloaded winding needle (2); and / or, The diaphragm fixing structure (6) is either fixed or movable.

14. The continuous winding method for a diaphragm according to claim 13, characterized in that, The diaphragm fixing structure (6) is integrated with the cutting structure (5) located on the outside of the outer diaphragm (3).

15. A method for continuous winding of a diaphragm according to any one of claims 1 to 9, characterized in that, After the inner diaphragm (4) is cut, the inner diaphragm winding end (41) is directly adsorbed and fixed by an unloaded winding needle (2); and / or, The outer membrane winding end (31) is conveyed toward the unloaded winding needle (2) by the transfer structure (7), and the outer membrane winding end (31) is adsorbed and fixed by the unloaded winding needle (2).

16. The method for continuous winding of a diaphragm according to claim 2, characterized in that, The outer diaphragm (3) and the inner diaphragm (4) are cut simultaneously, so that the feeding speed of the outer diaphragm (3) is greater than that of the inner diaphragm (4), and / or the inner diaphragm (4) is pulled back in the opposite direction of the feeding direction.

17. The method for continuous winding of a diaphragm according to claim 16, characterized in that, The inner diaphragm (4) is fed through the inner membrane feeding structure (8), and the inner diaphragm (4) is drawn back through the inner membrane feeding structure (8); or, The inner diaphragm (4) is fed through the inner membrane feeding structure (8), and the inner diaphragm (4) is pulled back through the retraction structure (9).

18. The method for continuous winding of a diaphragm according to claim 3, characterized in that, The cutting structure (5) is a cutter, which includes a connecting part (53), a first cutting edge (54) and a second cutting edge (55). The first end of the connecting part (53) is a hinge point (56), and the second end of the connecting part (53) is connected to both the end of the first cutting edge (54) away from the cutting edge and the end of the second cutting edge (55) away from the cutting edge. The connecting part (53) and the second cutting edge (55) extend in the same direction, and the first cutting edge (54) and the second cutting edge (55) are arranged at a predetermined angle. The cutting structure (5) is located on the outside of the outer diaphragm (3). The outer diaphragm (3) is cut by the first blade (54), and the cutter rotates at the hinge point (56) to cut the inner diaphragm (4) by the second blade (55); or The cutting structure (5) is located on the inner side of the inner diaphragm (4). The inner diaphragm (4) is cut by the first blade (54), and the cutter rotates at the hinge point (56) to cut the outer diaphragm (3) by the second blade (55).

19. The method for continuous winding of a diaphragm according to claim 18, characterized in that, The cutting structure (5) is located on the outside of the outer membrane (3). During the process of rotating the cutter at the hinge point (56), the outer membrane winding end (31) is pushed outward by the first blade (54).

20. A continuous diaphragm winding processing apparatus, characterized in that, A method for continuously winding a diaphragm according to any one of claims 1 to 19.

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