Diaphragm cutting device and flaking system

Abstract

The utility model discloses a diaphragm cutting device and flaking system.The diaphragm cutting device comprises two cutting roller sets, each cutting roller set comprises two abutting sub-rollers, and an abutting gap used for a diaphragm to penetrate through is formed between the two abutting sub-rollers; the abutting gaps of the two cutting roller sets are sequentially distributed in the conveying direction of the diaphragm. The laser cutting assembly is provided with at least one laser cutter, light beams emitted by the laser cutters can move, and the laser cutters are used for dynamically cutting the diaphragm located between the two cutting roller sets. According to the diaphragm cutting device, the cutting roller set and the laser cutting assembly are arranged, the diaphragm cutting efficiency can be improved, the problems of device blockage and the like are solved, dynamic cutting is used, the cutting effect is better, then resource waste and production cost can be reduced, equipment maintenance is easy, the utilization rate is increased, the using effect is better, and the diaphragm cutting device is suitable for popularization and application. And the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a diaphragm cutting device and a film making system with the diaphragm cutting device. Background Art

[0002] Under the background of "dual carbon", China's new energy industry is developing rapidly. Lithium-ion batteries are widely used due to their high energy density, long service life, green and pollution-free. In the structure of lithium batteries, the diaphragm is one of the key components. The main function of the diaphragm is to prevent the positive and negative electrodes inside the battery from directly contacting each other and causing a short circuit, while allowing electrolyte ions to pass through. The quality of the diaphragm will directly affect the interface structure and internal structure of the battery, thereby affecting the battery capacity, number of cycles and battery safety.

[0003] In the existing thermal composite lamination machines, the diaphragm cutting method is mainly hot knife or hot wire cutting, and the hot knife / wire cutting makes the hot knife / wire directly contact with the diaphragm, which makes the hot knife / wire easy to stick to the molten diaphragm. After the molten diaphragm accumulates, it will cause problems such as uncutting and subsequent blockage. In addition, it is difficult to clean the hot knife / wire that sticks to the molten diaphragm, and the replacement time is long, which affects the working efficiency of the equipment, makes the equipment difficult to maintain, and causes waste of manpower and material resources, increases costs, and has a low equipment utilization rate. There is room for improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a diaphragm cutting device, which can improve the efficiency of diaphragm cutting, reduce resource waste and production costs, and use dynamic cutting, which has better cutting effect, simple equipment maintenance and improved utilization rate.

[0005] According to the diaphragm cutting device of the embodiment of the utility model, it includes: two cutting roller groups, each of the cutting roller groups includes two pressing sub-rollers, a pressing gap for penetrating the diaphragm is formed between the two pressing sub-rollers, and the pressing gaps of the two cutting roller groups are distributed in sequence along the conveying direction of the diaphragm; a laser cutting component, the laser cutting component is provided with at least one laser cutter, the light beam emitted by the laser cutter is movable, and the laser cutter is used to dynamically cut the diaphragm located between the two cutting roller groups.

[0006] According to the diaphragm cutting device of the embodiment of the utility model, by providing a cutting roller group and a laser cutting component, the efficiency of diaphragm cutting can be improved, and problems such as device blockage can be avoided. In addition, dynamic cutting is used to achieve better cutting effect, thereby reducing resource waste and production costs, making equipment maintenance simple, improving utilization rate, achieving better use effect, and having a wider range of applications.

[0007] According to the diaphragm cutting device of some embodiments of the present invention, the cutting direction of the diaphragm by the light beam of the laser cutter is perpendicular to the conveying direction of the diaphragm.

[0008] According to the diaphragm cutting device of some embodiments of the present invention, the laser cutter is set to one, the conveying speed of the diaphragm is V1, the cutting speed of the laser cutter is V2, the width of the diaphragm after cutting is a and the length is b, satisfying: a / V1≤b / V2.

[0009] According to the diaphragm cutting device of some embodiments of the utility model, the laser cutters are arranged in number n, the cutting directions of the n laser cutters overlap, and the n laser cutters are distributed in sequence along the cutting directions.

[0010] According to the diaphragm cutting device of some embodiments of the present invention, the conveying speed of the diaphragm is V1, the cutting speed of the laser cutter is V3, the width of the diaphragm after cutting is a and the length is b, satisfying: a / V1≤b / nV3, n is a natural number greater than or equal to 2.

[0011] According to the diaphragm cutting device of some embodiments of the present invention, the n laser cutters are configured to cut simultaneously.

[0012] According to the diaphragm cutting device of some embodiments of the present invention, the laser cutter is located directly above the diaphragm.

[0013] According to some embodiments of the utility model, the diaphragm cutting device also includes: a feed roller group, the feed roller group is located on the feed side of the cutting roller group, the feed roller group includes two feed sub-rollers, a feed gap for penetrating the diaphragm is formed between the two feed sub-rollers, the feed gap and the pressure gap are distributed in sequence along the conveying direction of the diaphragm; a discharge roller group, the discharge roller group is located on the discharge side of the cutting roller group, the discharge roller group includes two discharge sub-rollers, a discharge gap for penetrating the diaphragm is formed between the two discharge sub-rollers, the pressure gap and the discharge gap are distributed in sequence along the conveying direction of the diaphragm.

[0014] According to some embodiments of the diaphragm cutting device of the present invention, the distance between the feed roller group and the cutting roller group is greater than the distance between the two cutting roller groups; and / or, the distance between the feed roller group and the cutting roller group is greater than the distance between the discharge sub-roller and the cutting roller group.

[0015] The utility model also provides a film-making system.

[0016] According to the film-making system of the embodiment of the utility model, a diaphragm cutting device as described above is provided.

[0017] The film making system and the above-mentioned diaphragm cutting device have the same advantages as the prior art, which will not be described in detail here.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a diaphragm cutting device according to an embodiment of the utility model;

[0021] Figure 2 It is a principle diagram of a diaphragm cutting device according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] Diaphragm cutting device 100,

[0024] Cutting roller set 1, pressing gap 11, laser cutter 2, feeding roller set 3, feeding gap 31, discharging roller set 4, discharging gap 31, dust removal component 5, light beam 6, diaphragm 7, frame 8. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Reference below Figure 1-Figure 2 The diaphragm cutting device 100 according to the embodiment of the utility model can improve the efficiency of diaphragm 7 cutting, reduce resource waste and production costs, and use dynamic cutting, so that the cutting effect is better, the equipment maintenance is simple, and the utilization rate is improved.

[0029] like Figure 1-Figure 2 As shown, the diaphragm cutting device 100 according to the embodiment of the utility model comprises: two cutting roller groups 1 and a laser cutting component.

[0030] Each cutting roller group 1 includes two pressing sub-rollers, and a pressing gap 11 for penetrating the diaphragm 7 is formed between the two pressing sub-rollers, and the pressing gaps 11 of the two cutting roller groups 1 are distributed in sequence along the conveying direction of the diaphragm 7. The laser cutting assembly is provided with at least one laser cutter 2. The light beam 6 emitted by the laser cutter 2 is movable, and the laser cutter 2 is used to dynamically cut the diaphragm 7 located between the two cutting roller groups 1.

[0031] Specifically, the diaphragm cutting device 100 is provided with a cutting roller group 1, and there are two cutting roller groups 1. The two cutting roller groups 1 are distributed in sequence along the conveying direction of the diaphragm 7. Each cutting roller group 1 is provided with two pressing sub-rollers, and the two pressing sub-rollers are arranged vertically. The diaphragm cutting device 100 is provided with a frame 8, and the frame 8 is placed under the diaphragm cutting device 100, for supporting the diaphragm cutting device 100 to a required height. The two pressing sub-rollers are installed on the frame 8 and can rotate relative to the frame 8. A pressing gap 11 is formed between the two pressing sub-rollers, and the diaphragm 7 can be inserted into the pressing gap 11. The pressing gaps 11 of the two cutting roller groups 1 are distributed in sequence along the conveying direction of the diaphragm 7, so that the diaphragm 7 can be placed in the pressing gap 11 of one of the cutting roller groups 1, and the diaphragm 7 is conveyed to the next cutting roller group 1 through the rotation of the cutting roller group 1.

[0032] Furthermore, the diaphragm cutting device 100 is also provided with a laser cutting component, and the laser cutting component is provided with at least one laser cutter 2, that is, the laser cutting component can be provided with one laser cutter 2, and can also be provided with two, three or more laser cutters 2. In the present embodiment, the laser cutting component is provided with a laser cutter 2, and the laser cutter 2 is located between the two cutting roller groups 1 along the conveying direction of the diaphragm 7. The laser cutter 2 can emit a laser beam 6, and the beam 6 is a movable beam 6, so that the laser cutter 2 can cut the diaphragm 7 located between the two cutting roller groups 1, and the cutting is dynamic cutting, that is, when the cutting roller group 1 rotates to convey the diaphragm 7 along the conveying direction, the beam 6 emitted by the laser cutter 2 can move with the diaphragm 7, and can cut the diaphragm 7 at the same time, thereby realizing dynamic cutting, which can improve the cutting accuracy and cutting efficiency.

[0033] According to the diaphragm cutting device 100 of the embodiment of the utility model, by providing a cutting roller group 1 and a laser cutting component, the efficiency of cutting the diaphragm 7 can be improved, and problems such as device blockage can be avoided. In addition, dynamic cutting is used to achieve a better cutting effect, thereby reducing resource waste and production costs, making the equipment maintenance simple, improving the utilization rate, achieving a better use effect, and having a wider range of applications.

[0034] Among them, the utilization rate refers to the ratio of the actual production time (operation time) to the production time (load time). It is obtained by dividing the operation time of the machine equipment by the maximum load time. The lower the utilization rate, the lower the production efficiency of the machine equipment. Conversely, the higher the utilization rate, the higher the production efficiency of the machine equipment. The operation time refers to the load time minus the time for mold change, tool change, failure, adjustment, etc. Therefore, to improve the utilization rate, it is necessary to reduce the loss time of mold change, tool change, failure, and adjustment.

[0035] In some embodiments, the cutting direction of the diaphragm 7 by the light beam 6 of the laser cutter 2 is perpendicular to the conveying direction of the diaphragm 7 .

[0036] Specifically, Figure 1 As shown, the diaphragm cutting device 100 is provided with a laser cutting component, and the laser cutting component is provided with at least one laser cutter 2. The laser cutter 2 can emit a laser beam 6, so that the laser cutter 2 can cut the diaphragm 7 located between the two cutting roller groups 1, and the cutting direction of the beam 6 of the laser cutter 2 on the diaphragm 7 is perpendicular to the conveying direction of the diaphragm 7, so that the cutting effect of the beam 6 on the diaphragm 7 is better, and the cut quality of the diaphragm 7 is high. At the same time, the laser cutter 2 is set to a magnetic suspension type, which can improve the positioning accuracy and cutting accuracy of the cutting.

[0037] In some embodiments, the laser cutter 2 is set to one, the conveying speed of the diaphragm 7 is V1, the cutting speed of the laser cutter 2 is V2, the width of the diaphragm 7 after cutting is a and the length is b, satisfying: a / V1≤b / V2.

[0038] Specifically, Figure 1 As shown, the membrane cutting device 100 is provided with a laser cutting assembly, and the laser cutting assembly is provided with a laser cutter 2, and the laser cutter 2 can emit a light beam 6, and the light beam 6 can cut the membrane 7, and the cutting is dynamic cutting, that is, the membrane 7 is cut during the transportation process of the membrane 7, and as shown in FIG. Figure 2 As shown, the conveying speed of the diaphragm 7 can be set to V1, the cutting speed of the laser cutter 2 can be set to V2, the width of the diaphragm 7 after cutting is set to a and the length is set to b, and it satisfies: a / V1≤b / V2, that is, the time required for cutting should be greater than or equal to the conveying time of the diaphragm 7, so that the laser cutter 2 can completely cut the diaphragm 7 to improve the cutting quality.

[0039] In some embodiments, the number of laser cutters 2 is n, the cutting directions of the n laser cutters 2 coincide, and the n laser cutters 2 are distributed sequentially along the cutting direction.

[0040] Specifically, the diaphragm cutting device 100 is provided with a laser cutting component, and the laser cutting component is provided with n laser cutters 2, that is, the laser cutting component can be set to multiple, and the multiple laser cutters 2 can emit light beams 6, and the cutting is dynamic cutting, the cutting directions of the n laser cutters 2 coincide, and the n laser cutters 2 are distributed in sequence along the cutting direction, so that the n light beams 6 emitted by the n laser cutters 2 can cut the diaphragm 7 at the same time, and the cutting directions of the n light beams 6 emitted by the n laser cutters 2 can be the same or opposite, thereby shortening the time required for cutting the diaphragm 7 and improving the cutting efficiency.

[0041] In some embodiments, the conveying speed of the diaphragm 7 is V1, the cutting speed of the laser cutter 2 is V3, the width of the diaphragm 7 after cutting is a and the length is b, satisfying: a / V1≤b / nV3, n is a natural number greater than or equal to 2.

[0042] Specifically, the diaphragm 7 is cut during the transportation of the diaphragm 7, the transportation speed of the diaphragm 7 can be set to V1, the cutting speed of the laser cutter 2 can be set to V3, the width of the diaphragm 7 after cutting is set to a and the length is set to b, and it satisfies: a / V1≤b / nV3, n is a natural number greater than or equal to 2, that is, the time required for n laser cutters 2 to cut the diaphragm 7 should be greater than or equal to the transportation time of the diaphragm 7, so that the n laser cutters 2 can cut the diaphragm 7 at the same time and can completely cut the diaphragm 7 to improve the cutting quality.

[0043] In some embodiments, n laser cutters 2 are configured to cut simultaneously.

[0044] Specifically, the diaphragm cutting device 100 is provided with a laser cutting component, and the laser cutting component may be provided with n laser cutters 2, and the laser cutter 2 may emit a laser beam 6, and the beam 6 may cut the diaphragm 7, and when the n laser cutters 2 emit the beam 6 at the same time, the diaphragm 7 may be cut at the same time, and the n laser cutters 2 may cut the diaphragm 7 at the same time, which may increase the cutting speed of the diaphragm 7, and thereby improve the cutting efficiency of the diaphragm cutting device 100.

[0045] In some embodiments, the laser cutter 2 is located directly above the diaphragm 7 .

[0046] Specifically, Figure 1 As shown, the diaphragm cutting device 100 is provided with a laser cutting component, and the laser cutting component is provided with at least one laser cutter 2. The laser cutter 2 can emit a laser beam 6, so that the laser cutter 2 can cut the diaphragm 7 located between the two cutting roller groups 1, and the laser cutter 2 is located directly above the diaphragm 7, so that the cutting direction of the light beam 6 of the laser cutter 2 on the diaphragm 7 is perpendicular to the conveying direction of the diaphragm 7, so that the cutting effect of the light beam 6 on the diaphragm 7 is better, and the cut quality of the diaphragm 7 is high.

[0047] In some embodiments, the membrane cutting device 100 further includes: an inlet roller set 3 and an outlet roller set 4 .

[0048] The feed roller group 3 is located on the feed side of the cutting roller group 1, and the feed roller group 3 includes two feed sub-rollers. A feed gap 31 for penetrating the diaphragm 7 is formed between the two feed sub-rollers, and the feed gap 31 and the pressure gap 11 are distributed in sequence along the conveying direction of the diaphragm 7. The discharge roller group 4 is located on the discharge side of the cutting roller group 1, and the discharge roller group 4 includes two discharge sub-rollers. A discharge gap 31 for penetrating the diaphragm 7 is formed between the two discharge sub-rollers, and the pressure gap 11 and the discharge gap 31 are distributed in sequence along the conveying direction of the diaphragm 7.

[0049] Specifically, Figure 1As shown, the diaphragm cutting device 100 is provided with a feed roller group 3 and a discharge roller group 4. The feed roller group 3 is arranged on the feed side of the diaphragm cutting device 100 and is located on the feed side of the cutting roller group 1. The discharge roller group 4 is arranged on the discharge side of the diaphragm cutting device 100 and is located on the discharge side of the cutting roller group 1. The feed roller group 3 and the discharge roller group 4 are distributed in sequence along the conveying direction of the diaphragm 7. The feed roller group 3 is provided with two feed sub-rollers, which are arranged vertically and rotatably installed on the frame 8. The two feed sub-rollers are arranged vertically and rotatably installed on the frame 8. A feeding gap 31 is formed between the feed rollers, and the feeding gap 31 can be used to penetrate the diaphragm 7. The discharging roller group 4 is provided with two discharging rollers, and the two discharging rollers are vertically arranged and rotatably installed on the frame 8. A discharging gap 31 is formed between the two discharging rollers, and the discharging gap 31 can be used to penetrate the diaphragm 7, so that the feeding gap 31 and the pressing gap 11 are distributed in sequence along the conveying direction of the diaphragm 7, and the pressing gap 11 and the discharging gap 31 are distributed in sequence along the conveying direction of the diaphragm 7.

[0050] Furthermore, when the diaphragm cutting device 100 is in operation, the diaphragm 7 can be placed in the feed gap 31 of the feed roller group 3, and transported to the pressure gap 11 of the cutting roller group 1 through the rotation of the feed roller, and can be transported to the pressure gap 11 of another cutting roller group 1 through the cutting roller group 1. The laser cutter 2 is located between the two cutting roller groups 1. When the diaphragm 7 is transported, the laser cutter 2 can dynamically cut the diaphragm 7 at the same time. The cut diaphragm 7 is transported to the discharge gap 31 of the discharge roller group 4 through the cutting roller group 1, and is transported to the discharge side through the discharge roller group 4 to complete the dynamic cutting of the diaphragm 7.

[0051] Among them, Figure 1 As shown, the diaphragm cutting device 100 is also provided with a dust removal component 5, and the dust removal component 5 is arranged near the cutting part of the diaphragm 7. When the diaphragm 7 is cut, dust, cutting debris, etc. will be generated. The dust removal component 5 can collect the dust, cutting debris, etc. generated by the cutting by adsorption and other means to ensure the operating environment of the diaphragm cutting device 100, and can avoid the influence of dust, cutting debris, etc. on the cutting effect, thereby improving the cutting effect.

[0052] In some embodiments, the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the two cutting roller groups 1, and / or the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the discharge sub-roller and the cutting roller group 1, that is, the diaphragm cutting device 100 can be set so that the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the two cutting roller groups 1, and the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the discharge sub-roller and the cutting roller group 1, or only the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the two cutting roller groups 1, or only the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the discharge sub-roller and the cutting roller group 1.

[0053] Specifically, Figure 1 As shown, in this embodiment, the diaphragm cutting device 100 is configured such that the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the two cutting roller groups 1, and the distance between the feed roller group 3 and the cutting roller group 1 is greater than the distance between the two cutting roller groups 1, and the distance between the feed roller group 3 and the cutting roller group 1 is configured to be greater than the distance between the two cutting roller groups 1, so that the two cutting roller groups 1 can be arranged between the feed roller group 3 and the cutting roller group 1, thereby completing the cutting of the diaphragm 7 between the two cutting roller groups 1, and the feed roller group 3 and the cutting roller group 1 The spacing between them is set to be larger than the spacing between the discharging roller and the cutting roller group 1. The feed roller group 3 is used to convey the diaphragm 7 into the diaphragm cutting device 100, and the diaphragm 7 is cut by the laser cutter 2 between the cutting roller group 1. The spacing between the feed roller group 3 and the cutting roller group 1 is set to be larger, so that when there is a speed difference between the cutting speed of the diaphragm 7 by the laser cutter 2 and the speed of the diaphragm 7 conveyed by the feed roller group 3, the diaphragm 7 can be placed between the feed roller group 3 and the cutting roller group 1 to avoid the diaphragm 7 from accumulating in the pressing gap 11 and affecting the production efficiency.

[0054] The utility model also provides a film making system.

[0055] According to the film-making system of the embodiment of the present invention, any one of the above-mentioned diaphragm cutting devices 100 is provided.

[0056] According to the film making system of the embodiment of the utility model, a diaphragm cutting device 100 is provided. The diaphragm cutting device 100 can improve the efficiency of cutting the diaphragm 7 and avoid problems such as device blockage by providing a cutting roller group 1 and a laser cutting component. In addition, dynamic cutting is used to achieve better cutting effect, thereby reducing resource waste and production costs, making equipment maintenance simple, improving utilization rate, achieving better use effect and a wider range of applications.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A diaphragm cutting device, characterized in that: include: Two cutting roller groups, each of which includes two pressing sub-rollers, a pressing gap for penetrating the diaphragm is formed between the two pressing sub-rollers, and the pressing gaps of the two cutting roller groups are distributed in sequence along the conveying direction of the diaphragm; A laser cutting assembly is provided with at least one laser cutter, the light beam emitted by the laser cutter is movable, and the laser cutter is used to dynamically cut the diaphragm located between the two cutting roller groups.

2. The diaphragm cutting device according to claim 1, characterized in that: The cutting direction of the diaphragm by the light beam of the laser cutter is perpendicular to the conveying direction of the diaphragm.

3. The diaphragm cutting device according to claim 2, characterized in that: The laser cutter is set to one, the conveying speed of the diaphragm is V1, the cutting speed of the laser cutter is V2, the width of the diaphragm after cutting is a and the length is b, satisfying: a / V1≤b / V2.

4. The diaphragm cutting device according to claim 2, characterized in that: The number of the laser cutters is n, the cutting directions of the n laser cutters overlap, and the n laser cutters are distributed in sequence along the cutting direction.

5. The diaphragm cutting device according to claim 4, characterized in that: The conveying speed of the diaphragm is V1, the cutting speed of the laser cutter is V3, the width of the diaphragm after cutting is a and the length is b, satisfying: a / V1≤b / nV3, n is a natural number greater than or equal to 2.

6. The diaphragm cutting device according to claim 4, characterized in that: The n laser cutters are configured to cut simultaneously.

7. The diaphragm cutting device according to claim 1, characterized in that: The laser cutter is located directly above the diaphragm.

8. The diaphragm cutting device according to claim 1, characterized in that: Also includes: A feed roller group, the feed roller group is located at the feed side of the cutting roller group, the feed roller group includes two feed sub-rollers, a feed gap for penetrating the diaphragm is formed between the two feed sub-rollers, and the feed gap and the pressing gap are distributed in sequence along the conveying direction of the diaphragm; A discharge roller group, the discharge roller group is located on the discharge side of the cutting roller group, the discharge roller group includes two discharge sub-rollers, a discharge gap for penetrating a diaphragm is formed between the two discharge sub-rollers, the pressing gap and the discharge gap are distributed in sequence along the conveying direction of the diaphragm.

9. The diaphragm cutting device according to claim 8, characterized in that: The distance between the feeding roller group and the cutting roller group is greater than the distance between the two cutting roller groups; And / or, the distance between the feed roller group and the cutting roller group is greater than the distance between the discharge sub-roller and the cutting roller group.

10. A film-making system, characterized in that: A diaphragm cutting device according to any one of claims 1 to 9 is provided.

Images