Winding unit, diaphragm slitting equipment

Abstract

The present application provides a winding unit, including a frame, a chuck and a pressure roller. The chuck is arranged on the frame, and the chuck can rotate around a first direction; the chuck is used to fix the winding core, and the winding core is used to wind the diaphragm into a film roll. The pressure roller is rotatably connected to the frame, and the pressure roller is configured to rotate around its own axis and the circumference can contact the circumference of the film roll; the pressure roller is also configured to rotate relative to the frame around the second direction to change the angle between its own axis and the first direction, and can move along the second direction away from the chuck. The winding unit provided by the present application can effectively improve the problems of warping, oblique wrinkles and other defects on the edges of the wound film roll.

Description

Technical Field

[0001] The present application relates to the technical field of diaphragm production, and in particular to a winding unit and a diaphragm slitting device. Background Art

[0002] During the production of battery diaphragms, the width of the diaphragms before slitting is relatively large, and the diaphragms need to be slit to obtain film rolls of appropriate width. During the slitting process, due to thickness differences, tension changes, unbalanced pressure on both sides of the roll, gaps in the roll, etc., the film rolls are prone to production defects such as edge warping and slanting wrinkles. Diaphragm products with warped edges and slanting wrinkles will affect the subsequent use of the diaphragms, causing defects such as drooping edges and wrinkles on the film surface during unwinding, causing serious problems such as coating omissions and changes in mechanical strength during the coating process, thereby affecting the product's pass rate. Utility Model Content

[0003] The purpose of the present application is to provide a winding unit and a membrane slitting arrangement to reduce defects such as warping and wrinkling on the edges of the wound membrane roll.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a winding unit, comprising a frame, a chuck and a pressure roller. The chuck is arranged on the frame, and the chuck can rotate around a first direction; the chuck is used to fix a winding core, and the winding core is used to wind the diaphragm into a film roll.

[0006] The pressure roller is rotatably connected to the frame, and is configured to rotate around its own axis and its circumference can contact the circumference of the film roll; the pressure roller is also configured to rotate around the second direction relative to the frame to change the angle between its own axis and the first direction, and can move along the second direction away from the chuck.

[0007] In the above technical solution, since the pressure roller can rotate relative to the frame about the second direction to change the angle between its own axis and the first direction, during the winding process, the pressure roller can apply a force toward the outside of the film roll to the diaphragm in the film roll, so that the edges of the diaphragm after slitting are flattened outward during the winding process, thereby effectively improving the problem of warping, oblique wrinkles and other defects on the edges of the wound film roll. Since the pressure roller can also move in the second direction away from the chuck, the position of the pressure roller can be adaptively changed as the diameter of the film roll increases.

[0008] In some optional embodiments, a pressure roller frame is connected between the pressure roller and the frame, and the pressure roller frame includes a first section and a second section that are connected to each other, the first section is connected to the frame, and the second section is connected to the pressure roller; the pressure roller frame has a first state and a second state, and in the first state, the pressure roller frame is configured so that the first section can rotate around the second direction relative to the second section; and in the second state, the pressure roller frame is configured so that the first section and the second section are fixedly connected.

[0009] In the above technical solution, the pressure roller frame includes a first section and a second section which are connected to each other, and the first section is connected to the frame, the second section is connected to the pressure roller, and the first section and the second section can rotate relative to each other around the second direction. Therefore, the pressure roller can rotate around the second direction to change the angle between its own axis and the first direction.

[0010] In some optional embodiments, a bearing is connected between the first section and the second section, and the axis of the bearing is parallel to the second direction, so that the first section and the second section can rotate relative to each other.

[0011] In the above technical solution, by arranging a bearing between the first section and the second section, the first section and the second section can be easily rotated relative to each other.

[0012] In some optional embodiments, the end of the first section away from the frame is a cylindrical structure; the bearing includes an inner ring and an outer ring that can rotate relative to each other; the outer ring of the bearing is connected to the inner wall of the cylindrical structure, and the end of the second section is connected to the inner ring of the bearing.

[0013] In some optional embodiments, the side wall of the cylindrical structure is provided with a radially through hole, and a pin is arranged in the through hole; the circumferential surface of the second section is provided with a plurality of grooves distributed along the same circumference, and when the first section and the second section rotate relative to each other around the second direction, the pin passes through the grooves in sequence along the circumference; the pin is configured to be inserted into the groove to limit the relative rotation of the first section and the second section.

[0014] In the above technical solution, by setting a pin in the first section and a groove in the second section, the relative rotation between the first section and the second section can be limited by inserting the pin into the groove, thereby avoiding changes in the angle between the axis of the pressure roller and the first direction during the winding process.

[0015] In some optional embodiments, at least one of the first section and the second section is configured to have a variable dimension along the second direction, so that the pressing roller can move along the second direction away from the clamping head.

[0016] In the above technical solution, since the size of at least one of the first section and the second section in the second direction can be changed, the pressure roller can move along the second direction away from the clamping head to adapt to the increase in the diameter of the film roll during the winding process.

[0017] In some optional embodiments, the frame is slidably connected to the pressure roller frame, and the pressure roller frame is configured to be reciprocating relative to the frame in the first direction.

[0018] In the above technical solution, the pressure roller frame can reciprocate relative to the frame in the first direction, and the contact position between the pressure roller and the film roll during the winding process can be adjusted.

[0019] In some optional embodiments, an air supply device and a heating device are further included, wherein the interior of the pressure roller has a chamber, the air supply device is connected to the pressure roller via a pipeline to introduce gas into the chamber of the pressure roller, and the heating device is configured to heat the gas provided by the air supply device; the circumferential surface of the pressure roller is provided with air outlet holes connected to the chamber.

[0020] In the above technical solution, the hot air discharged from the air outlet can heat the edge of the diaphragm during the winding process, thereby improving the flattening effect of the edge of the membrane surface, significantly improving the vertical edge defects of the edge of the membrane surface, and thus improving the quality of the edge of the membrane roll.

[0021] In some optional embodiments, a plurality of axially arranged partitions are provided inside the pressure roller to divide the chamber into a plurality of independent subspaces. The pipeline passes through the partitions in sequence. The pipeline is also provided with a plurality of openings, which are arranged corresponding to the subspaces so as to supply gas into the subspaces through the openings.

[0022] In the above technical solution, by arranging partitions in the chamber to divide the chamber into sub-spaces, the heat distribution inside the pressure roller can be made more uniform.

[0023] In a second aspect, an embodiment of the present application provides a membrane slitting device, comprising a cutting unit, a winding core, and the winding unit provided in the first aspect, wherein the winding core is fixed to the chuck, and the winding unit is configured to wind up the membrane cut by the cutting unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the use of a winding unit provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of a partial structure of a winding unit provided in an embodiment of the present application;

[0027] Figure 3 is a schematic diagram showing that the axis of the pressing roller is parallel to the first direction;

[0028] Figure 4 is a schematic diagram showing that the axis of the pressure roller and the first direction have an included angle;

[0029] Figure 5 A schematic diagram of a pressure roller provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the internal structure of the pressure roller provided in an embodiment of the present application.

[0031] Icons: 100-frame; 200-chuck; 300-winding core; 400-pressure roller; 410-partition; 420-subspace; 430-air outlet; 500-pressure roller frame; 510-first section; 511-pin; 520-second section; 521-groove; 522-cylinder; 600-bearing; 700-air supply device; 800-film roll. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of this application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] The present application provides a membrane slitting device, including a cutting unit, a winding core 300 and a winding unit. The cutting unit is used to slit the membrane with a larger specification, and the winding core 300 is arranged on the winding unit. The membrane with a smaller width after slitting is wound on the winding core 300 by the winding unit.

[0039] The winding unit provided in the present application includes a frame 100, a clamp 200 disposed on the frame 100, and a pressure roller 400 rotatably connected to the frame 100. The frame 100 is a structure fixed relative to the ground; the clamp 200 is used to fix the winding core 300, and the clamp 200 can rotate around the first direction (i.e. Figure 1It is not difficult to understand that fixing the winding core 300 does not mean that the winding core 300 is fixed, but that the chuck 200 and the winding core 300 are connected as a whole, and when the chuck 200 rotates around the first direction, the winding core 300 rotates together, thereby winding the diaphragm into a film roll 800. It is not difficult to understand that since the chuck 200 rotates around the first direction, after the winding core 300 is fixed to the chuck 200, the axial direction of the winding core 300 should be parallel to the first direction, and the axis of the winding core 300 and the rotation axis of the chuck 200 coincide with each other.

[0040] In some embodiments, the chuck 200 is directly rotatably connected to the frame 100 of the winding unit so that the chuck 200 and the winding core 300 can rotate together; in other embodiments, the chuck 200 can also be other structures in the connection and slitting device, and technicians in this field can reasonably set the connection position of the chuck 200 while achieving the purpose of winding.

[0041] The pressure roller 400 is rotatably connected to the frame 100, so that the pressure roller 400 can rotate around its own axis, and during the rotation of the pressure roller 400, its circumferential surface can contact the circumferential surface of the film roll 800 formed during the winding process. It is not difficult to understand that the film roll 800 is cylindrical, with a circumferential surface that is a cylindrical surface and two end surfaces that are planes; since the circumferential surface of the pressure roller 400 can contact the circumferential surface of the film roll 800, therefore, when the pressure roller 400 contacts the edge of the circumferential surface of the film roll 800 (that is, the edge where the diaphragm is cut), due to the limitation of the pressure roller 400, the defects such as warping and wrinkling on the edge of the film roll 800 can be reduced.

[0042] Further, in some embodiments of the present application, the pressing roller 400 can also move along the second direction ( Figure 1 The film roll 800 moves in the direction indicated by the arrow B in the middle (in the direction indicated by the arrow B) so that the distance between the pressure roller 400 and the winding core 300 gradually increases, thereby adapting to the increased diameter of the film roll 800 assembly during the winding process.

[0043] Furthermore, in the winding unit provided in the present application, the pressure roller 400 can also rotate relative to the frame 100 around the second direction to change the angle between the axis of the pressure roller 400 itself and the first direction. Figure 3 and Figure 4 , Figure 3 In the embodiment, the axis of the winding core 300 (parallel to the first direction) is parallel to the axis of rotation of the pressing roller 400. During the rotation of the pressing roller 400, the force exerted by the circumference of the pressing roller 400 on the film roll 800 is perpendicular to the first direction. Figure 4In the figure, there is an angle α between the axis of the winding core 300 (parallel to the first direction) and the axis of rotation of the pressure roller 400. During the rotation of the pressure roller 400, the circumferential surface of the pressure roller 400 can exert a force on the film roll 800 toward the outside of the film roll 800 (i.e., the direction indicated by the arrow C in the figure), so that the edges of the slit diaphragms are flattened outward during the winding process, thereby effectively improving the problems of warping, wrinkling and other defects on the edges of the wound film roll 800.

[0044] Furthermore, in some embodiments of the present application, in order to facilitate the adjustment of the position of the pressure roller 400 so that the pressure roller 400 contacts the peripheral surface of the edge position of the film roll 800, the pressure roller 400 is also configured to be movable along the first direction. It is not difficult to understand that since the axis of the winding core 300 is parallel to the first direction, the pressure roller 400 moves along the first direction, that is, it can move along the axis direction of the winding core 300, and then the position where the pressure roller 400 contacts the film roll 800 on the winding core 300 can be adjusted, so that the peripheral surface of the pressure roller 400 contacts the edge position of the peripheral surface of the film roll 800.

[0045] In some embodiments, the roller 400 is connected to the frame 100 support with a roller frame 500, and the roller frame 500 includes a first section 510 and a second section 520 that are connected to each other and can rotate with each other. The direction of relative rotation of the first section 510 and the second section 520 is parallel to the second direction, the first section 510 is connected to the frame 100, and the second section 520 is connected to the roller 400, so that the roller 400 rotates relative to the frame 100 around the second direction; the first section 510 is also slidably connected to the frame 100, so that the roller frame 500 can reciprocate relative to the frame 100 in the first direction. Further, the roller 400 is rotatably connected to the second section 520, and the relative rotation axis of the roller 400 and the second section 520 is the axis of the roller 400 itself. In other embodiments, the roller frame 500 can also be an integral structure, and the roller frame 500 adopts a rotational connection with the frame 100 to realize the rotation of the roller 400 relative to the frame 100 around the second direction.

[0046] Furthermore, in an embodiment in which the pressure roller frame 500 includes a first section 510 and a second section 520 that can rotate with each other, in order to avoid a change in the angle between the axis of the pressure roller 400 and the first direction during the winding process, in some embodiments, the pressure roller frame 500 has a first state and a second state. When the pressure roller frame 500 is in the first state, the first section 510 can rotate about the second direction relative to the second section 520 to adjust the angle between the axis of the pressure roller 400 and the first direction; when the pressure roller frame 500 is in the second state, the first section 510 and the second section 520 are fixedly connected, that is, the first section 510 and the second section 520 cannot rotate, thereby avoiding a change in the angle between the axis of the pressure roller 400 and the first direction.

[0047] In order to make the rotation between the first section 510 and the second section 520 smoother, a bearing 600 is further connected between the first section 510 and the second section 520, and the axis of the bearing 600 is parallel to the second direction to adapt the first section 510 and the second section 520 to rotate relative to each other around the second direction; it is not difficult to understand that the bearing 600 includes two parts that can rotate relative to each other (such as the inner ring and the outer ring of the ball bearing 600), and the axis of the bearing 600 is the axis of relative rotation of the two parts. In an embodiment of using a ball bearing 600 between the first section 510 and the second section 520, as Figure 2 As shown, the end of the first section 510 away from the frame 100 is a cylindrical structure, the outer ring of the bearing 600 contacts the inner wall of the cylindrical structure, and the end of the second section 520 is connected to the inner ring of the bearing 600 to achieve relative rotation between the first section 510 and the second section 520. Among them, the first section 510 and the outer ring of the bearing 600, and the second section 520 and the inner ring of the bearing 600 can be welded, or fixedly connected by a fastening screw or other connecting parts. Of course, in some other embodiments, the outer ring of the bearing 600 can be connected to the second section 520, and the inner ring of the bearing 600 can be connected to the first section 510. Those skilled in the art can adaptively adjust the structures of the first section 510 and the second section 520 according to the connection method.

[0048] Further, in Figure 2 In the embodiment shown, the roller frame 500 is placed in the second state by limiting the relative rotation between the first section 510 and the second section 520 through the pin 511 and the groove 521 structure. Since the first section 510 and the second section 520 are connected by a ball bearing 600, the bearing 600 limits the relative movement of the first section 510 and the second section 520 along the second direction, thereby fixing the first section 510 and the second section 520. Specifically, Figure 2 As shown, the cylindrical structure in the first section 510 is provided with a through hole that penetrates radially, and a pin 511 is provided in the through hole; a plurality of grooves 521 distributed along the same circumference are provided on the circumference of the second section 520, and the relative rotation between the first section 510 and the second section 520 can be limited by inserting the pin 511 into the groove 521. When the pin 511 of the first section 510 is inserted into the groove 521 at different positions in the second section 520, the angle between the axis of the pressure roller 400 and the first direction is different. In other embodiments, the circumference of the pin 511 can also be provided with a thread, and the pin 511 is threadedly connected to the first section 510, and the tail of the pin 511 is inserted into the groove 521 of the second section 520 by screwing in the pin 511. By threading the pin 511 to the first section 510, the pin 511 can be effectively prevented from falling off from the first section 510.

[0049] In some embodiments of the present application, the movement of the pressing roller 400 along the second direction is achieved by the size change of at least one of the first section 510 and the second section 520 along the second direction. For example, at least one of the first section 510 and the second section 520 is configured to have a size change along the second direction, so that the pressing roller 400 can move along the second direction away from the clamping head 200, and then away from the winding core 300. Specifically, Figure 1 In the embodiment shown, the second section 520 is provided with a cylinder 522, and the piston rod of the cylinder 522 extends along the second direction. As the diameter of the film roll 800 gradually increases, the film roll 800 pushes the pressing roller 400 to move toward the first section 510, and the extended length of the piston rod of the cylinder 522 gradually decreases. Figure 1 In the embodiment shown, the force exerted by the pressure roller 400 on the circumference of the film roll 800 can also be adjusted by the cylinder 522 to meet different pressure requirements. Of course, in other embodiments, the cylinder 522 can also be arranged in the first section 510; the cylinder 522 can also be replaced by a liquid cylinder.

[0050] Of course, in some other embodiments, the pressure roller frame 500 can be moved as a whole relative to the frame 100 along the second direction, thereby increasing the distance between the pressure roller 400 and the winding core 300 to accommodate the film roll 800 with a gradually increasing diameter.

[0051] Further, if Figure 1 and Figure 5 As shown, in some embodiments, the winding unit further includes an air supply device 700 and a heating device. The interior of the pressure roller 400 has a chamber, and the air supply device 700 is connected to the chamber in the pressure roller 400 through a pipeline to pass gas into the chamber. The circumferential surface of the pressure roller 400 is provided with an air outlet 430 connected to the chamber, so that the gas in the chamber can be discharged through the air outlet 430. The heating device is used to heat the gas provided by the air supply device 700, so that the gas discharged from the air outlet 430 on the circumferential surface of the pressure roller 400 has a certain temperature. During the winding process, the gas in the chamber can contact the surface of the diaphragm in the film roll 800 through the air outlet 430, and then heat the diaphragm, which can improve the flattening effect of the edge of the film surface, significantly improve the vertical edge defects of the edge of the film surface, and thus improve the quality of the edge of the film roll 800. Furthermore, an air volume regulating valve may be provided on the pipeline connecting the pressure roller 400 and the air supply device 700 to control the air volume of the air outlet 430 of the pressure roller 400; the heating device may also be connected to a temperature control system to control the temperature of the gas discharged from the air outlet 430 of the pressure roller 400. Furthermore, the pressure roller 400 may be made of metal material to make the diaphragm more evenly heated.

[0052] In some embodiments, Figure 6As shown, a plurality of axially arranged partitions 410 are further provided inside the pressure roller 400 to divide the chamber into a plurality of mutually independent subspaces 420. The pipeline passes through the partitions 410 in sequence, and the pipeline is also provided with an opening corresponding to each subspace 420 to feed gas into the subspace 420. By providing the partitions 410 to divide the chamber into a plurality of subspaces 420, the heat distribution inside the pressure roller 400 can be made more uniform, thereby making the diaphragm in contact with the pressure roller 400 more evenly heated.

[0053] The operation of using the winding unit provided in one embodiment of the present application for production includes:

[0054] According to the width size of the divided diaphragm, the position of the pressure roller 400 is adjusted before the production starts, so that the pressure roller 400 can contact the edge position of the circumference of the film roll 800 during the winding process; the pressure roller frame 500 is first adjusted to the first state, and the pressure roller 400 is rotated in the second direction to change the angle between the axis of the pressure roller 400 and the axis of the winding core 300, and then the pressure roller frame 500 is adjusted to the second state.

[0055] It is not difficult to understand that the winding unit provided in the present application can not only be used in the slitting device to process the edge of the diaphragm, but also in other scenarios where the diaphragm needs to be wound up, such as in the diaphragm production system, the winding unit provided in the present application can also be used for winding, so as to reduce the defects such as warping and wrinkles on the edge of the received film roll 800.

[0056] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A winding unit, characterized in that: include: frame, A chuck is arranged on the frame, and the chuck can rotate around a first direction; the chuck is used to fix a winding core, and the winding core is used to wind the diaphragm into a film roll; A pressure roller is rotatably connected to the frame, and the pressure roller is configured to rotate around its own axis and its circumference can contact the circumference of the film roll; the pressure roller is also configured to rotate around a second direction relative to the frame to change the angle between its own axis and the first direction, and can move along the second direction away from the chuck.

2. The winding unit according to claim 1, characterized in that: A pressure roller frame is connected between the pressure roller and the frame, and the pressure roller frame includes a first section and a second section that are connected to each other, the first section is connected to the frame, and the second section is connected to the pressure roller; the pressure roller frame has a first state and a second state, and in the first state, the pressure roller frame is configured so that the first section can rotate around the second direction relative to the second section; in the second state, the pressure roller frame is configured so that the first section and the second section are fixedly connected.

3. The winding unit according to claim 2, characterized in that: A bearing is connected between the first section and the second section, and an axis of the bearing is parallel to the second direction, so that the first section and the second section can rotate relative to each other.

4. The winding unit according to claim 3, characterized in that: The end of the first section away from the frame is a cylindrical structure; the bearing includes an inner ring and an outer ring that can rotate relatively; the outer ring of the bearing is connected to the inner wall of the cylindrical structure, and the end of the second section is connected to the inner ring of the bearing.

5. The winding unit according to claim 4, characterized in that: The side wall of the cylindrical structure is provided with a radially penetrating through hole, and a pin is arranged in the through hole; the circumferential surface of the second section is provided with a plurality of grooves distributed along the same circumference, and when the first section and the second section rotate relative to each other around the second direction, the pin passes through the grooves in sequence along the circumference; the pin is configured to be inserted into the groove to limit the relative rotation of the first section and the second section.

6. The winding unit according to any one of claims 2 to 5, characterized in that: At least one of the first section and the second section is configured to be variable in size along the second direction, so that the pressing roller can move along the second direction away from the clamping head.

7. The winding unit according to claim 2, characterized in that: The frame is slidably connected to the pressure roller frame, and the pressure roller frame is configured to be able to reciprocate relative to the frame in the first direction.

8. The winding unit according to claim 1, characterized in that: It also includes an air supply device and a heating device. The interior of the pressure roller has a chamber. The air supply device is connected to the pressure roller through a pipeline to introduce gas into the chamber of the pressure roller. The heating device is configured to heat the gas provided by the air supply device. The circumferential surface of the pressure roller is provided with air outlet holes connected to the chamber.

9. The winding unit according to claim 8, characterized in that: The interior of the pressure roller is provided with a plurality of axially arranged partitions to divide the chamber into a plurality of mutually independent subspaces. The pipeline passes through the partitions in sequence. The pipeline is also provided with a plurality of openings, which are arranged corresponding to the subspaces so as to supply gas into the subspaces through the openings.

10. A diaphragm cutting device, characterized in that: It comprises a cutting unit, a winding core and the winding unit according to any one of claims 1 to 9, wherein the winding core is fixed to the clamping head, and the winding unit is configured to wind up the diaphragm cut by the cutting unit.

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