Slitting system for diaphragm

Abstract

The slitting system comprises a modification device, a first conveying roller and a second conveying roller, the first conveying roller and the second conveying roller are used for conveying the diaphragm, and a slitting device used for cutting the diaphragm is arranged in front of the first conveying roller. The modification device comprises a first air outlet for blowing out hot air and a second air outlet for blowing out cold air; the slitting device, the first conveying roller, the first air outlet, the second air outlet and the second conveying roller are sequentially arranged along the conveying path of the diaphragm. According to the technical scheme, the diaphragm is subjected to heat treatment through hot air blown out of the first air outlet, the diaphragm is cooled and shaped through cold air blown out of the second air outlet, in the diaphragm slitting process, heat treatment can be conducted on the diaphragm firstly, and then cooling and shaping are conducted on the diaphragm; and thus, the influence of the slitting process on the thermal shrinkage performance of the diaphragm can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of diaphragm production, and in particular to a slitting system for diaphragms. Background Art

[0002] The key physical properties of the diaphragm include porosity, air permeability, thermal shrinkage, etc. The large film obtained by conventional dry or wet methods is rolled up to form a preliminary mother roll, and the mother roll is generally cut into narrow width film rolls of several widths by large slitting. The existing technology only cuts and segments the film surface during the slitting process. Due to the stretching effect during the slitting process, the physical properties of the film surface will be affected, especially the thermal shrinkage performance is easy to increase, which in turn affects the physical properties of the diaphragm. Utility Model Content

[0003] The purpose of the present application is to provide a slitting system for a diaphragm, so as to reduce the influence of the slitting process of the diaphragm on the thermal shrinkage performance of the diaphragm.

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

[0005] In the first aspect, the embodiment of the present application provides a slitting system for a membrane, comprising a modification device and a first transmission roller and a second transmission roller for transmitting the membrane, wherein a slitting device for cutting the membrane is arranged before the first transmission roller. The modification device comprises a first air outlet for blowing out hot air and a second air outlet for blowing out cold air; along the transmission path of the membrane, the slitting device, the first transmission roller, the first air outlet, the second air outlet, and the second transmission roller are arranged in sequence.

[0006] In the above technical solution, the membrane can be transported by the first transport roller and the second transport roller, and the membrane can be cut by the slitting device. The membrane is heat-treated by the hot air blown out of the first air outlet, and the membrane is cooled and shaped by the cold air blown out of the second air outlet. In the process of cutting the membrane, the membrane can be heat-treated first and then cooled and shaped, thereby reducing the influence of the slitting process on the thermal shrinkage performance of the membrane.

[0007] In some optional embodiments, the modification device also includes a first air outlet piece and a second air outlet piece, the first air outlet is arranged on the first air outlet piece, and the second air outlet is arranged on the second air outlet piece; the first air outlet piece and the second air outlet piece can be rotatably arranged to change the angle formed by the gas flow direction at the position of the first air outlet and the second air outlet and the diaphragm.

[0008] In the above technical solution, by rotatably arranging the first air outlet member and the second air outlet member, on the one hand, the position of the cooling area and the heating area of ​​the diaphragm, and the size of the heating area and the cooling area of ​​the diaphragm can be changed to adapt to the cutting process of diaphragms of different specifications.

[0009] In some optional embodiments, the modification device includes a bracket, the first air outlet piece is rotatably connected to the bracket at a first position; the second air outlet piece is rotatably connected to the bracket at a second position; the first air outlet piece is connected to a first driving piece; the second air outlet piece is connected to a second driving piece; the first driving piece is used to drive the first air outlet piece to rotate around the first position; so as to change the angle formed by the gas flow direction at the first air outlet position and the diaphragm; the second driving piece is used to drive the second air outlet piece to rotate around the second position; so as to change the angle formed by the gas flow direction at the second air outlet position and the diaphragm.

[0010] In some optional embodiments, the modification device includes a bracket, the first air outlet piece is slidably connected to the bracket at a first position; the second air outlet piece is slidably connected to the bracket at a second position; the first air outlet piece is connected to a first driving piece; the second air outlet piece is connected to a second driving piece; the first driving piece is rotatably connected to the first air outlet piece and is used to drive the first air outlet piece to slide relative to the bracket at the first position; so as to change the angle formed by the gas flow direction at the first air outlet position and the diaphragm; the second driving piece is rotatably connected to the second air outlet piece and is used to drive the second air outlet piece to slide relative to the bracket at the second position; so as to change the angle formed by the gas flow direction at the second air outlet position and the diaphragm.

[0011] In some optional embodiments, the first air outlet member and the second air outlet member are both plate-shaped structural members, the first air outlets are evenly distributed on a large surface of the first air outlet member, and the second air outlets are evenly distributed on a large surface of the second air outlet member.

[0012] In the above technical solution, the first air outlet member and the second air outlet member are plate-shaped structural members, which can facilitate the arrangement of the first air outlet and the second air outlet, and have sufficient space for setting the first air outlet and the second air outlet.

[0013] In some optional embodiments, the first air outlet member and the second air outlet member are configured such that the gas blown out from the first air outlet and the second air outlet can act on the same area on the diaphragm.

[0014] In the above technical solution, the gas blown out from the first air outlet and the second air outlet can act on the same area on the diaphragm, that is, there is an overlapping part between the heated area and the cooled area of ​​the diaphragm, so that the diaphragm can smoothly transition between heating and cooling.

[0015] In some optional embodiments, the angle formed by the surface of the first air outlet provided with the first air outlet and the movement direction of the diaphragm is α; the angle formed by the surface of the second air outlet provided with the second air outlet and the movement direction of the diaphragm is β, and the angle ratio q is defined as α / β, where q is 0.2 to 4.7.

[0016] In the above technical solution, q is 0.2-4.7, and the first air outlet member and the second air outlet member have a larger rotation range.

[0017] In some optional embodiments, the values ​​of α and β are both in the range of 15° to 70°.

[0018] In some optional embodiments, it also includes a return air plate arranged between the first air outlet piece and the second air outlet piece, the return air plate is provided with a first return air outlet facing the first air outlet piece, and a second return air outlet facing the second air outlet piece, and the first return air outlet and the second return air outlet are connected to an exhaust device.

[0019] In the above technical solution, the surrounding wind pressure can be controlled by the return air plate, which plays a role in stabilizing the membrane surface of the diaphragm and preventing the membrane surface from shaking due to excessive wind pressure.

[0020] In some optional embodiments, the slitting device includes a grooved roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 is a schematic diagram of an existing slitting system for a diaphragm;

[0023] Figure 2 A partial schematic diagram of a slitting system provided in an embodiment of the present application.

[0024] Icons: 100-first transmission roller; 200-second transmission roller; 300-modification device; 310-first air outlet; 311-first air outlet; 320-second air outlet; 321-second air outlet; 331-first driving member; 332-second driving member; 340-bracket; 350-return air plate; 400-diaphragm; 510-first air source; 520-second air source; 600-exhaust device; 700-slitting device; 810-unwinding roller; 820-winding roller. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Existing slitting systems for diaphragms 400 are as follows Figure 1 As shown, the unwinding roller 810, the slitting device 700, the first transmission roller 100, the second transmission roller 200 and the winding roller 820 are sequentially arranged from front to back. After the diaphragm 400 is slit by the slitting device 700, it passes through the first transmission roller 100 and the second transmission roller 200 successively before reaching the winding roller 820.

[0032] The present application provides a slitting system for a diaphragm 400, including a modification device 300, through which the modification device 300 is used to reduce the impact on the thermal shrinkage performance of the diaphragm 400 during the slitting process of the diaphragm 400. Further, the modification device 300 provided in the present application includes a first air outlet 311 for blowing out hot air and a second air outlet 321 for blowing out cold air; the hot air blown out of the first air outlet 311 is used to heat treat the diaphragm 400, and the cold air blown out of the second air outlet 321 is used to cool and shape the diaphragm 400, which can reduce the impact of the slitting process on the thermal shrinkage performance of the diaphragm 400. Those skilled in the art can set the temperature of the hot air blown out of the first air outlet 311 according to the hot melting temperature, closed cell temperature, etc. of the diaphragm 400, such as the temperature of the hot air is lower than the closed cell temperature; those skilled in the art can also determine the temperature of the cold air blown out of the second air outlet 321 according to the ambient temperature, as long as there is a certain cooling effect on the diaphragm 400. For example, the temperature of the hot air may be between 80°C and 130°C, and the temperature of the cold air may be between 15°C and 50°C.

[0033] The membrane 400 slitting system provided in the present application further includes a first transmission roller 100 and a second transmission roller 200 for transmitting the membrane 400, and a slitting device 700 disposed in front of the first transmission roller 100 for cutting the membrane 400. After being slid by the slitting device 700, the membrane 400 moves along the first transmission roller 100 toward the second transmission roller 200. Figure 2 The slitting device 700, the first transmission roller 100, the first air outlet 311, the second air outlet 321 and the second transmission roller 200 are arranged in sequence, that is, in the process of slitting the diaphragm 400 using the slitting system provided in the present application, the diaphragm 400 first passes through the first transmission roller 100, and then is heated by the hot air blown out of the first air outlet 311, and then is cooled by the cold air blown out of the second air outlet 321, and finally passes through the second transmission roller 200.

[0034] In some embodiments of the present application, the modification device 300 is disposed between the slitting device 700 and the second conveying roller 200, that is, the slitting membrane 400 first passes through the hot air blown out of the first air outlet 311, and then passes through the cold air blown out of the second air outlet 321. In a specific embodiment, the first air outlet 311 and the second air outlet 321 are disposed between the first conveying roller 100 and the second conveying roller 200. In other embodiments, the first air outlet 311, the second air outlet 321 and the slitting device 700 may be disposed at other relative positions, and those skilled in the art may adjust according to the actual installation space, as long as the slitting membrane 400 first passes through the hot air blown out of the first air outlet 311, and then passes through the cold air blown out of the second air outlet 321.

[0035] In some other embodiments, the first air outlet 311 and the second air outlet 321 in the modifying device 300 may also be respectively disposed on both sides of the slitting device 700. That is, the diaphragm 400 is first heated by the hot air blown out of the first air outlet 311, then cut by the slitting device 700, and then cooled by the cold air blown out of the second air outlet 321.

[0036] In some embodiments of the present application, the modification device 300 includes a first air outlet member 310 and a second air outlet member 320, wherein a first air outlet 311 is disposed on the first air outlet member 310, and a second air outlet 321 is disposed on the second air outlet member 320. The first air outlet 311 and the second air outlet 321 are both rotatably disposed to change the angle formed by the gas flow direction at the positions of the first air outlet 311 and the second air outlet 321 and the diaphragm 400.

[0037] By rotatably arranging the first air outlet member 310 and the second air outlet member 320, the action area of ​​the gas blown out of the first air outlet 311 and the second air outlet 321 on the diaphragm 400 can be changed. On the one hand, the position of the area where the gas blows on the diaphragm 400 can be changed, such as changing the position of the cooling area and the heating area of ​​the diaphragm 400; or changing the size of the heating area and the cooling area of ​​the diaphragm 400. On the other hand, the size of the overlapping part of the heating area and the cooling area can be changed so that the diaphragm 400 smoothly transitions between heating and cooling, avoiding the uniformity of the membrane surface performance affected by the sudden temperature change. In some preferred embodiments, the area of ​​the heating area of ​​the diaphragm 400 is about twice the area of ​​the cooling area. Among them, the heating area of ​​the diaphragm 400 refers to the area of ​​the diaphragm 400 that contacts the hot air blown out of the first air outlet 311; the cooling area of ​​the diaphragm 400 refers to the area of ​​the diaphragm 400 that contacts the cold air blown out of the second air outlet 321.

[0038] In some embodiments of the present application, the first air outlet member 310 and the second air outlet member 320 can be rotated by rotating the first air outlet member 310 and the second air outlet member 320 around an axis. Figure 2 In the illustrated embodiment, the modification device 300 further includes a bracket 340, a first air outlet member 310 is rotatably connected to a first position of the bracket 340, and a second air outlet member 320 is rotatably connected to a second position of the bracket 340; the first bracket 340 is connected to a first driving member 331 for driving the first air outlet member 310 to rotate, and the second bracket 340 is connected to a second driving member 332 for driving the second air outlet member 320 to rotate. The first driving member 331 can drive the first air outlet member 310 to rotate around the first position, thereby changing the angle formed by the flow direction of the blown gas at the position of the first air outlet 311 and the diaphragm 400, thereby changing the position and size of the heated area on the diaphragm 400; similarly, the second air outlet member 320 can be rotated by the second driving member 332, thereby changing the position and size of the cooled area on the diaphragm 400. Further, the rotational connection between the first air outlet member 310 and the bracket 340 can be realized by a rotating shaft or by a hinge connection.

[0039] Furthermore, in the above-mentioned embodiment, the first driving member 331 and the second driving member 332 can be retractable devices such as a cylinder or a liquid cylinder, and the end of the first air outlet member 310 away from the first position is rotatably connected to one end of the first driving member 331, and the other end of the first driving member 331 can be rotatably connected to the bracket 340, and the other end of the first driving member 331 can also be rotatably connected to other structures, as long as the first driving member 331 can drive the first air outlet member 310 to rotate. In the above-mentioned embodiment, the first driving member 331 and the second driving member 332 can also be existing devices whose output motion is rotation, such as a motor, etc. The output end of the motor and other devices is fixedly connected to the first driving member 331, and the rotation axis of the output end of the motor and other devices coincides with the rotation axis of the first air outlet member 310 in the first position. The connection method between the second driving device and the second driving member 332 can refer to the connection method between the first driving member 331 and the first air outlet member 310, which will not be repeated here. Furthermore, the first driving member 331 and the second driving member 332 may both be telescopic devices such as cylinders; or both may be devices such as motors whose output motion is rotation; or one of the first driving member 331 and the second driving member 332 may be a telescopic device such as a cylinder, and the other may be a device such as a motor whose output motion is rotation.

[0040] In an embodiment where the first air outlet piece 310 and the second air outlet piece 320 are rotatable by rotating them around an axis, the first air outlet piece 310 and the bracket 340 may be rotatably connected at a first position, and the second air outlet piece 320 and the bracket 340 may be rotatably connected at a second position. The first driving member 331 and the first air outlet member 310 are connected in a relatively movable manner. For example, a track is provided at one end of the first air outlet member 310 away from the first position. The first driving member 331 is a retractable device such as a cylinder or a liquid cylinder. One end of the first driving member 331 is fixedly connected and the other end is slidably connected to the track. The first driving member 331 and the first air outlet member 310 are also rotatably connected. Through the telescopic movement of the first driving member 331, one end of the first driving member 331 slides relatively along the track on the first air outlet member 310, and the first driving member 331 and the second driving member 332 rotate relatively. Because one end of the first driving member 331 is fixed, the first driving member 331 is stationary relative to the ground while the first air outlet member 310 rotates relative to the ground, that is, the first driving member 331 drives the first air outlet member 310 to rotate. Of course, the end of the first driving member 331 that is fixedly connected can be fixedly connected to the bracket 340, or can be fixedly connected to other positions, as long as the first driving member 331 can be driven to rotate during the extension and retraction of the first driving member 331. The connection method between the second driving device and the second driving member 332 can refer to the connection method between the first driving member 331 and the first air outlet member 310, and will not be repeated here.

[0041] In some other embodiments of the present application, the first air outlet member 310 can be rotated by moving one end of the first air outlet member 310 relative to the other end, thereby realizing rotation; the second air outlet member 320 can be rotated in the same manner. In one embodiment, one end of the first air outlet member 310 is slidably connected to the bracket 340 at a first position, and the other end is slidably connected to the bracket 340 at a third position, and the first driving member 331 is connected to the first air outlet member 310. Furthermore, the first driving member 331 is a retractable device, and the two ends of the first air outlet member 310 slide relative to the bracket 340 in different directions. Therefore, under the action of the first driving member 331, the two ends of the first air outlet member 310 move relative to each other, thereby causing the first air outlet member 310 to rotate, so as to change the angle formed by the gas flow direction at the position of the first air outlet 311 and the diaphragm 400. In other embodiments, one end of the first air outlet member 310 may be slidably connected to the bracket 340 at the first position, and the other end may be rotatably connected to the bracket 340, and the relative sliding trajectory of the first air outlet member 310 and the bracket 340 may be arc-shaped. The first driving member 331 is connected to the first air outlet member 310, so that one end of the first air outlet member 310 slides relative to the bracket 340, and the other end rotates relative to the bracket 340, thereby rotating the first air outlet member 310 to change the angle formed by the gas flow direction at the position of the first air outlet 311 and the diaphragm 400. In this embodiment, the arrangement of the second air outlet member 320 and the second driving member 332 may refer to the first air outlet member 310 and the first driving member 331, and will not be repeated here.

[0042] In the above-mentioned embodiments, the first air outlet member 310 and the second air outlet member 320 can be plate-shaped structural members, tubular structural members, or other forms of structural members, as long as the above-mentioned functions can be achieved. In the embodiment where the first air outlet member 310 and the second air outlet member 320 are plate-shaped structural members, the first air outlet member 310 and the second air outlet member 320 both have a large surface disposed toward the diaphragm 400, and the large surface refers to the surface with a larger area in the first air outlet member 310 and the second air outlet member 320, and the first air outlet 311 is disposed on the large surface disposed toward the diaphragm 400 in the first air outlet member 310, and the second air outlet 321 is disposed on the large surface disposed toward the diaphragm 400 in the second air outlet member 320. Furthermore, the first air outlet 311 may be composed of a plurality of small holes evenly distributed on the large surface of the first air outlet member 310; the first air outlet 311 may also be an opening disposed on the large surface and having a size similar to that of the large surface; similarly, the specific form of the second air outlet 321 may refer to the form of the first air outlet 311, and will not be described in detail here. In the embodiment where the first air outlet member 310 is a tubular structure, the first air outlet 311 may also be an opening with a larger size disposed in the tubular structure toward one side or one end of the diaphragm 400, or may be a plurality of evenly distributed small holes; further, the first air outlet member 310 may also be a tubular structure including a plurality of first air outlets 311 disposed thereon.

[0043] It is not difficult to know from the above that in the embodiment where the first air outlet member 310 and the second air outlet member 320 are both plate-shaped structural members, the first air outlet member 310 and the second air outlet member 320 can rotate so that the gas blown out of the first air outlet 311 and the second air outlet 321 can act on the same area on the diaphragm 400. Figure 2 As shown, the angle formed by the surface of the first air outlet member 310 provided with the first air outlet 311 and the movement direction of the diaphragm 400 is α; the angle formed by the surface of the second air outlet member 320 provided with the second air outlet 321 and the movement direction of the diaphragm 400 is β; the angle ratio q=α / β is defined, q is 0.2~4.7, so that the first air outlet plate and the second air outlet plate have a larger angle adjustment range, thereby adapting to the application scenario of cutting diaphragms 400 with various physical properties, and further, the values ​​of α and β are both in the range of 15°~70°.

[0044] In some preferred embodiments, the area of ​​the heated region on the diaphragm 400 is larger than the area of ​​the cooled region, and accordingly, q is between 0.5 and 0.7, that is, q may be equal to 0.5, 0.6 or 0.7.

[0045] Since the thickness and physical properties of diaphragms 400 of different specifications are different, the required heating and cooling areas are also different. By changing the values ​​of α and β mentioned above, the production of diaphragms 400 of different specifications and different speeds can be adapted; therefore, the device can adjust the physical properties of the membrane surface according to different application scenarios, thereby obtaining smaller thermal shrinkage and improving the quality of the diaphragm 400.

[0046] Further, in some embodiments of the present application, the modification device 300 further includes a return air plate 350, which is disposed between the first air outlet 310 and the second air outlet 320, and specifically disposed between the first air outlet 311 and the second air outlet 321. The return air plate 350 is provided with a first return air outlet toward the first air outlet 310 and a second return air outlet toward the second air outlet 320, and the first return air outlet and the second return air outlet are connected with an exhaust device 600, through which part of the gas between the diaphragm 400 and the modification device 300 is extracted to reduce the wind pressure between the diaphragm 400 and the modification device 300, and the surrounding wind pressure can be controlled by the return air plate 350, so as to stabilize the membrane surface of the diaphragm 400 and prevent the membrane surface from shaking due to excessive wind pressure. Further, the first return air outlet and the second return air outlet can be connected to each other or not.

[0047] It should not be difficult for technicians in this field to understand that the first air outlet piece 310 is also connected to a first air source 510 for providing hot air, and the second air outlet piece 320 is also connected to a second air source 520 for providing cold air; wherein, the first air source 510 and the second air source 520 can be included in the cutting system provided in the present application, or can be independent devices connected to the cutting system provided in the present application.

[0048] In the slitting system provided in the present application, the slitting device 700 may adopt an existing knife-grooved roller, or other existing equipment capable of slitting the diaphragm 400 .

[0049] 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 slitting system for a diaphragm, characterized in that: It comprises a first conveying roller and a second conveying roller for conveying the diaphragm, wherein a slitting device for cutting the diaphragm is arranged in front of the first conveying roller; It also includes a modification device, which includes a first air outlet for blowing out hot air and a second air outlet for blowing out cold air; along the transmission path of the diaphragm, the slitting device, the first transmission roller, the first air outlet, the second air outlet, and the second transmission roller are arranged in sequence.

2. The slitting system according to claim 1, characterized in that: The modification device also includes a first air outlet piece and a second air outlet piece, the first air outlet is arranged on the first air outlet piece, and the second air outlet is arranged on the second air outlet piece; the first air outlet piece and the second air outlet piece can be rotatably arranged to change the angle formed by the gas flow direction at the position of the first air outlet and the second air outlet and the diaphragm.

3. The slitting system according to claim 2, characterized in that: The modification device comprises a bracket, the first air outlet member is rotatably connected to the bracket at a first position; the second air outlet member is rotatably connected to the bracket at a second position; the first air outlet member is connected to a first driving member; the second air outlet member is connected to a second driving member; The first driving member is used to drive the first air outlet member to rotate around the first position; so as to change the angle formed by the gas flow direction at the first air outlet position and the diaphragm; the second driving member is used to drive the second air outlet member to rotate around the second position; so as to change the angle formed by the gas flow direction at the second air outlet position and the diaphragm.

4. The slitting system according to claim 2, characterized in that: The modification device comprises a bracket, the first air outlet member is slidably connected to the bracket at a first position; the second air outlet member is slidably connected to the bracket at a second position; the first air outlet member is connected to a first driving member; the second air outlet member is connected to a second driving member; The first driving member is rotatably connected to the first air outlet member and is used to drive the first air outlet member to slide relative to the bracket at the first position; so as to change the angle formed by the gas flow direction at the first air outlet position and the diaphragm; the second driving member is rotatably connected to the second air outlet member and is used to drive the second air outlet member to slide relative to the bracket at the second position; so as to change the angle formed by the gas flow direction at the second air outlet position and the diaphragm.

5. The slitting system according to any one of claims 2 to 4, characterized in that: The first air outlet member and the second air outlet member are both plate-shaped structural members, the first air outlets are evenly distributed on a large surface of the first air outlet member, and the second air outlets are evenly distributed on a large surface of the second air outlet member.

6. The slitting system according to claim 5, characterized in that: The first air outlet member and the second air outlet member are configured such that the gas blown out of the first air outlet and the second air outlet can act on the same area on the diaphragm.

7. The slitting system according to claim 6, characterized in that: The angle formed by the surface of the first air outlet member provided with the first air outlet and the movement direction of the diaphragm is α; the angle formed by the surface of the second air outlet member provided with the second air outlet and the movement direction of the diaphragm is β, and the angle ratio q is defined as α / β, where q is 0.2 to 4.

7.

8. The slitting system according to claim 7, characterized in that: The values ​​of α and β are both within the range of 15° to 70°.

9. The slitting system according to claim 5, characterized in that: It also includes a return air plate arranged between the first air outlet piece and the second air outlet piece, the return air plate is provided with a first return air outlet facing the first air outlet piece, and a second return air outlet facing the second air outlet piece, and the first return air outlet and the second return air outlet are connected to an exhaust device.

10. The slitting system according to claim 1, characterized in that: The slitting device comprises a knife groove roller.

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