A fixed-length slitting device for flexible materials

Abstract

The application relates to a fixed-length slitting device for flexible materials, which comprises a traction mechanism, a material guide wheel, a die frame, a cutter roller, an anvil roller and a driving mechanism, the cutter roller is arranged on the die frame, the cutter roller comprises a first roller body and a first mandrel, the first roller body is sleeved on the first mandrel, the first roller body comprises a first base body and a blade, the anvil roller is arranged on the die frame, the anvil roller is located on one side of the cutter roller, the anvil roller comprises a second roller body and a second mandrel, the second roller body is sleeved on the second mandrel, and the second roller body comprises a second base body and an anvil. Different from the prior art, the application can realize quick and accurate cutting of long-length flexible materials by using small-diameter cutter roller and anvil roller bodies, improve the production efficiency of long-length flexible material fixed-length cutting, improve the size precision of the fixed length, and reduce the material waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotary rolling cutting, in particular to a fixed-length rolling cutting device for flexible materials. BACKGROUND

[0002] The existing new energy battery winding machine generally adopts a fixed-length cutting process to cut the positive and negative diaphragm materials. The cutting mechanism needs to be quickly started, accelerated, cut, and then returned quickly. Due to these actions, the production line speed is limited, generally at about 100 m / min, the production efficiency cannot be further improved, the size accuracy of the fixed-length is not high, and a large amount of energy is wasted. SUMMARY

[0003] Therefore, it is necessary to provide a fixed-length rolling cutting device for flexible materials to solve the technical problems of low production efficiency, low size accuracy of fixed-length, and waste of a large amount of materials in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides a fixed-length rolling cutting device for flexible materials, comprising:

[0005] A traction mechanism is used to convey the flexible material to the rear-end equipment at a preset speed.

[0006] A material guide wheel is located behind the traction mechanism.

[0007] A die holder is located behind the material guide wheel.

[0008] A cutter roller is arranged on the die holder, the cutter roller comprises a first roller body and a first mandrel, the first roller body is sleeved on the first mandrel, the first roller body comprises a first base body and a blade, the first base body is provided with a first groove in the axial direction of the first roller body, the blade is arranged in the first groove in the axial direction of the first roller body, and the blade tip of the blade protrudes from the outer circle of the first base body.

[0009] An anvil roller is arranged on the die holder, the anvil roller is located on one side of the cutter roller, the traction mechanism and the material guide wheel are used to feed the flexible material at a preset speed between the cutter roller and the anvil roller, the anvil roller comprises a second roller body and a second mandrel, the second roller body is sleeved on the second mandrel, the second roller body comprises a second base body and an anvil, the second base body is provided with two or more than two air holes, the second base body is provided with a second groove in the axial direction of the second roller body, the anvil is arranged in the second groove in the axial direction of the second roller body, and the anvil protrudes from the outer circle of the second base body.

[0010] The cutting blade arranged on the outer circle of the cutter roller and the anvil arranged on the outer circle of the anvil roller are in contact once with zero gap between the cutting blade tip and the outer circle surface of the anvil after relative rotation of a preset number of turns, and the cutting of the flexible material of a certain length is accurately completed.

[0011] A gas distribution disc is arranged on the end face of the anvil roller, and is used to provide negative pressure or positive pressure for the suction holes of the anvil roller, so that the anvil roller adsorbs or releases the flexible material.

[0012] As an embodiment of the present application, the fixed-length roll cutting device further comprises a driving mechanism and a transmission mechanism, the driving mechanism is used to drive the cutter roller to rotate, the cutter roller is in transmission connection with the anvil roller through the transmission mechanism, the cutter roller and the anvil roller are kept in relative rotation with a fixed proportion of linear velocity, the transmission ratio of the transmission mechanism is equal to the ratio of the diameter of the first roller body of the cutter roller to the diameter of the second roller body of the anvil roller, so that the cutting blade arranged on the outer circle of the cutter roller and the anvil arranged on the outer circle of the anvil roller are in contact once with zero gap between the cutting blade tip and the outer circle surface of the anvil after relative rotation of a preset number of turns, and the cutting of the flexible material of a certain length is accurately completed.

[0013] As an embodiment of the present application, the first roller body further comprises a pressing block, a blade pad and a first fastener, the pressing block, the blade and the blade pad are arranged in sequence from outside to inside, and the pressing block, the blade and the blade pad are fixed in the first groove through the first fastener.

[0014] As an embodiment of the present application, the second base body is arranged with two or more first suction holes along the axial direction of the second roller body, and the first suction holes are in communication with each other.

[0015] As an embodiment of the present application, the second base body is arranged with two or more second suction holes along the circumferential direction of the second roller body, and two adjacent first suction holes are in communication with one second suction hole.

[0016] As an embodiment of the present application, the anvil is fixed in the second groove through screws, rivets, welding or adhesion.

[0017] As an embodiment of the present application, the fixed-length roll cutting device further comprises two driving units, and the two driving units respectively drive the cutter roller and the anvil roller to rotate, so that the cutter roller and the anvil roller are kept in relative rotation with a fixed proportion of linear velocity.

[0018] As an embodiment of the present application, the tip of the cutting blade is in V-shaped cross section, and the top of the anvil is provided with a smooth contact surface.

[0019] As an embodiment of the present application, the fixed-length roll cutting device further comprises a pressing mechanism arranged on the die frame, which is used to drive the cutting knife roller to approach or move away from the anvil roller and to apply working pressure. The material guide wheel is arranged on one side of the anvil roller, and the traction mechanism is arranged on one side of the material guide wheel.

[0020] As an embodiment of the present application, the fixed-length roll cutting device is applied to the roll cutting of the positive and negative electrode diaphragm material of a new energy battery.

[0021] Differing from the prior art, the above technical solution is that the flexible material enters the anvil roller with adsorption holes through the traction mechanism and the material guide wheel, the anvil roller is used to adsorb and transport the flexible material, the flexible material enters between the cutting knife roller and the anvil roller at a preset speed, the linear speed of the anvil roller is the same as the material transport speed, the cutting knife roller and the anvil roller rotate relatively at a fixed ratio of linear speed, the cutting blade of the cutting knife roller and the anvil of the anvil roller are in zero-gap contact once after a preset number of relative rotations, and the cutting of the flexible material of a certain length is accurately completed; since the cutting blade tip of the cutting knife roller and the outer circular surface of the anvil of the anvil roller are both higher than the position of the base body, the cutting blade tip will only contact the outer circular surface of the anvil to produce the cutting action when the cutting blade is turned to the position opposite to the anvil, and will not contact the outer circular surface of the anvil at other times; the fast and accurate cutting of the flexible material of a longer length can be realized by using a smaller cutting knife roller and anvil roller, the production efficiency of the fixed-length cutting of the flexible material of a longer length is improved, the size accuracy of the fixed length is improved, and the waste of the material is reduced.

[0022] The above invention content is only a summary of the technical solution of the present application. In order for those skilled in the art to more clearly understand the technical solution of the present application, and then can be implemented according to the content recorded in the specification and the drawings, and in order for the above and other purposes, characteristics and advantages of the present application to be more easily understood, the following will be described in combination with the specific embodiments of the present application and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings are only used to show the principles, implementation manners, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and cannot be considered as a limitation of the present application.

[0024] In the drawings of the specification:

[0025] Figure 1 Principle diagram of the fixed-length roll cutting device for flexible material of an embodiment of the present application Figure 1 ;

[0026] Figure 2 Principle diagram of the fixed-length roll cutting device for flexible material of an embodiment of the present application Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the structure of a fixed-length rolling cutting device for flexible materials according to an embodiment of this application;

[0028] Figure 4 This is a cross-sectional schematic diagram of a fixed-length rolling cutting device for flexible materials according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of a cutter roller according to an embodiment of this application;

[0030] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0031] Figure 7 This is a front view of a cutting roller according to an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the structure of an anvil roller according to one embodiment of this application;

[0033] Figure 9 This is a front view of an anvil roller according to an embodiment of this application;

[0034] Figure 10 This is a schematic diagram showing the unfolded structure of a second substrate according to an embodiment of this application.

[0035] The reference numerals used in the above figures are explained as follows:

[0036] 1. Traction mechanism,

[0037] 2. Guide roller,

[0038] 3. Mold frame,

[0039] 4. Cutting roller; 41. First roller body; 411. First base; 412. Blade; 413. First groove; 414. Pressure block; 415. Blade pad; 416. First fastener; 419. Balance block; 420. Screw; 42. First spindle.

[0040] 5. Anvil roller; 51. Second roller body; 511. Second base; 512. Anvil; 514. First suction hole; 515. Second suction hole; 52. Second mandrel.

[0041] 6. Transmission mechanism,

[0042] 7. Pressurization mechanism,

[0043] 8. Valve distribution plate. Detailed Implementation

[0044] To explain possible application scenarios, technical principles, specific implementation schemes, and the purposes and effects of the present application in detail, the following embodiments are described in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0045] In this paper, the term "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0046] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0047] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, X and / or Y, which means that there are three cases: X exists, Y exists, and X and Y exist at the same time. In addition, the character " / " in this paper generally represents that the associated objects before and after are a kind of "or" logical relationship.

[0048] In the present application, such as "first" and "second", the terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0049] Without more limitations, in the present application, the phrases "include", "contain", "have" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include the elements inherent in such process, method or product.

[0050] As the same as the understanding in the "Examination Guidelines", in the present application, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is two or more (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times", etc., unless otherwise explicitly specified.

[0051] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The indicated orientation or position relationship is based on the orientation or position relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and does not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0052] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", etc. should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integrated setting; it can be mechanical connection, or electrical connection, or communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] The existing flexible material fixed-length chasing mechanism needs to start quickly, chase, shear, loosen the knife quickly return, affected by these actions, the production line speed is limited, the production efficiency cannot be further improved, and the size accuracy of the fixed length is also not high. At the same time, due to the relatively long round trip, more useless work is done, which is easy to waste materials.

[0054] The fixed-length rolling cutting device for flexible materials related to the present embodiment can be applied to various fixed-length cutting of various flexible materials.

[0055] According to some embodiments of the present application, please refer to Figures 1 to 10The embodiment relates to a fixed-length slitting device for flexible materials, which comprises a traction mechanism 1, a material guide wheel 2, a die frame 3, a cutter roller 4, an anvil roller 5, a driving mechanism (not shown in the figure) and a gas distribution disc, the material guide wheel 2 is located at the rear of the traction mechanism 1, and the die frame 3 is located at the rear of the material guide wheel 2.

[0056] The traction mechanism 1 comprises a traction mechanism driving unit, the traction mechanism driving unit provides power for the traction mechanism 1, and the traction mechanism 1 is used for feeding the flexible materials to a rear-end device at a preset speed, in particular, the traction mechanism 1 is used for feeding the flexible materials to the space between the cutter roller 4 and the anvil roller 5 at the preset speed.

[0057] The die frame 3 is used for supporting the cutter roller 4 and the anvil roller 5 to realize high-speed and high-precision relative rotation slitting.

[0058] The cutter roller 4 is arranged on the die frame 3, the cutter roller 4 comprises a first roller body 41 and a first mandrel 42, the first roller body 41 is sleeved on the first mandrel 42, the first roller body 41 comprises a first base body 411 and a blade 412, the first base body 411 is provided with a first groove 413 in the axial direction of the first roller body 41, and the blade 412 is arranged in the first groove 413 in the axial direction of the first roller body 41, and the blade tip of the blade 412 protrudes from the outer circle of the first base body 411.

[0059] As shown in the figure, Figure 5 As shown in the figure, Figure 6 The outer circle diameter of the blade tip of the blade 412 in the embodiment is greater than the outer circle diameter of the first base body 411, the diameter difference is within 1mm, that is, the blade tip of the blade 412 protrudes from the outer circle of the first base body 411 within 1mm. In the embodiment, the first roller body 41 and the first mandrel 42 of the cutter roller 4 can adopt an integral structure and be integrally formed, or can adopt a split structure, the first roller body 41 is sleeved on the first mandrel 42, and the first mandrel 42 supports the high-speed rotation slitting of the first roller body 41.

[0060] The anvil roller 5 is arranged on the die frame 3, the anvil roller 5 is located on one side of the cutter roller 4, the traction mechanism 1 and the material guide wheel 2 are used for feeding the flexible materials into the space between the cutter roller 4 and the anvil roller 5 at a preset speed, the anvil roller 5 comprises a second roller body 51 and a second mandrel 52, the second roller body 51 is sleeved on the second mandrel 52, the second roller body 51 comprises a second base body 511 and an anvil 512, the second base body 511 is provided with two or more air suction holes, the second base body 511 is provided with a second groove in the axial direction of the second roller body 51, the anvil 512 is arranged in the second groove in the axial direction of the second roller body 51, and the anvil 512 protrudes from the outer circle of the second base body 511.

[0061] As shown in the figure, Figure 7As shown, the outer diameter of the anvil 512 in the embodiment is slightly larger than the outer diameter of the second base 511. The difference in diameter is within 1mm, that is, the anvil 512 protrudes from the outer circle of the second base 511 within 1mm. In the embodiment, the second roller body 51 of the anvil roller 5 and the second mandrel 52 can adopt a whole structure and be integrally formed, or adopt a split structure, that is, the second roller body 51 is sleeved on the second mandrel 52, and the second mandrel 52 supports the second roller body 51 to rotate at high speed for roll cutting.

[0062] The length of the blade 412 and the anvil 512 extending in the axial direction is determined according to the width of the flexible material to be cut.

[0063] In the embodiment, the blade 412 arranged on the outer circle of the cutter roller 4 and the anvil 512 arranged on the outer circle of the anvil roller 5 are in contact once with zero gap between the blade tip of the blade 412 and the outer surface of the anvil 512 after a preset number of rotations, and the cutting of the flexible material of a certain length is accurately completed. At this time, the center distance between the cutter roller 4 and the anvil roller 5 is equal to the radius of the blade tip of the blade 412 plus the radius of the outer surface of the anvil 512. The blade tip of the blade 412 and the anvil 512 can achieve zero contact, and when the blade tip of the blade 412 and the anvil 512 are in contact, the gap is zero, so as to cut the flexible material.

[0064] It is ensured that the blade tip of the blade 412 does not contact the outer surface of the second base 511, and the anvil 512 does not contact the outer surface of the first base 411 during rotation. The thickness of the anvil 512 is within 5-10mm, and the blade tip of the cutter roller 4 can only contact the outer surface of the anvil 512 of the anvil roller 5 once after a preset number of rotations of the cutter roller 4 and the anvil roller 5 (preferably 5-10mm). During use, the cutter roller 4 and the anvil roller 5 rotate towards each other. Since the blade 412 of the cutter roller 4 and the anvil 512 of the anvil roller 5 are both higher than the positions of the first base 411 and the second base 511, the blade tip of the blade 412 will only be in zero contact with the outer surface of the anvil 512 to produce a cutting action when the blade 412 is in a position opposite to the anvil 512. The blade tip of the blade 412 will not contact the outer surface of the anvil 512 at other times.

[0065] The driving mechanism is used to drive the cutter roller 4 and the anvil roller 5 to rotate, so that the cutter roller 4 and the anvil roller 5 rotate at a fixed ratio of linear speed, and the blade 412 arranged on the outer circle of the cutter roller 4 and the anvil 512 arranged on the outer circle of the anvil roller 5 are in contact once with zero gap between the blade tip of the blade 412 and the outer surface of the anvil 512 after a preset number of rotations, and the cutting of the flexible material is completed.

[0066] In the embodiment, two driving mechanisms can be provided to drive the cutter roller 4 and the anvil roller 5 to rotate at a fixed ratio of linear speed, or one driving mechanism can be provided to drive the cutter roller 4 and the anvil roller 5 to rotate at a fixed ratio of linear speed.

[0067] The air distribution disc 8 is arranged on the end face of the anvil roller, and is used to provide negative pressure or positive pressure for the suction holes of the anvil roller 5, so that the anvil roller 5 adsorbs or releases the flexible material. As shown in Figure 5 In the embodiment, two air distribution discs 8 can be arranged on the end faces of the two ends of the anvil roller 5, and in other embodiments, the air distribution disc 8 can be arranged at other positions as long as it can provide negative pressure or positive pressure for the suction holes; or one air distribution disc 8 can be arranged on the end face of any one end of the anvil roller 5, and the air distribution disc 8 is used to distribute the gas delivered to the anvil roller 5 from the external gas source, so that the flexible material is stably adsorbed on the outer surface of the anvil roller 5 when entering the anvil roller 5, and rotates synchronously with the anvil roller 5; when the flexible material is cut off, the flexible material is released to separate from the outer surface of the anvil roller 5 and enter the next process. When the anvil roller 5 adsorbs the flexible material, the air distribution disc 8 provides negative pressure for the suction holes of the anvil roller 5 to suck the flexible material, and when the anvil roller 5 releases the flexible material, the air distribution disc 8 provides normal pressure or positive pressure for the suction holes of the anvil roller 5 according to the actual situation, so that the flexible material separates from the outer surface of the anvil roller 5.

[0068] In the embodiment, the flexible material enters the anvil roller 5 with suction holes through the traction mechanism 1 and the material guide wheel 2, the suction holes on the anvil roller 5 are communicated with the external negative pressure device, and are used to adsorb and transport the flexible material; the traction mechanism 1 and the material guide wheel 2 provide an initial speed for the flexible material, the flexible material enters between the cutter roller 4 and the anvil roller 5 at the designed initial speed V0, and the linear speed of the anvil roller 5 is the same as the conveying speed of the flexible material. The driving mechanism can drive the cutter roller 4 and the anvil roller 5 to rotate independently, or the driving mechanism can drive the cutter roller 4 and the anvil roller 5 to rotate simultaneously through gears or synchronous pulleys, as long as the cutter roller 4 and the anvil roller 5 rotate relatively at a fixed ratio of linear speed. If the cutter roller 4 and the anvil roller 5 are connected by gears or synchronous pulleys, the ratio of the cutter roller 4 and the anvil roller 5 is equal to the transmission ratio:

[0069] d 切刀辊 / d 砧辊 = Z1 / Z2 (Z1 and Z2 have no common factor)

[0070] The cutting edge of the blade 412 arranged on the outer circle of the cutter roller 4 and the anvil block 512 arranged on the outer circle of the anvil roller 5 coincide once after a certain number of relative rotations, and the fast cutting is completed. The small diameter of the cutter roller 4 realizes the fast and accurate cutting of the long length of the battery separator material. The fixed-length roll cutting device has a compact structure and can realize continuous high-speed accurate fixed-length cutting.

[0071] According to some embodiments of the present application, optionally, Figure 6As shown, the fixed-length rolling cutting device further comprises a driving mechanism and a transmission mechanism 6, the driving mechanism is used to drive the cutting knife roller 4 to rotate, the cutting knife roller 4 is in transmission connection with the anvil roller 5 through the transmission mechanism 6, so that the cutting knife roller 4 and the anvil roller 5 rotate relatively at a fixed linear speed ratio, the transmission ratio of the transmission mechanism 6 is equal to the ratio of the diameter of the first roller body 41 of the cutting knife roller 4 to the diameter of the second roller body 51 of the anvil roller 5, so as to realize that the blade 412 arranged on the outer circle of the cutting knife roller 4 and the anvil 512 arranged on the outer circle of the anvil roller 5 are in contact once with zero gap between the blade tip and the outer circle surface of the anvil after a preset number of relative rotations, and the cutting of the flexible material of a certain length is accurately completed. In this way, one driving mechanism and the transmission mechanism 6 can be used to drive the cutting knife roller 4 and the anvil roller 5 to rotate towards each other at the same time, the transmission ratio of the transmission mechanism 6 is equal to the ratio of the diameters of the roller body of the cutting knife roller 4 and the roller body of the anvil roller 5, d 切刀辊 and d 砧辊 of the anvil roller 5 are equal to the transmission ratio, as shown in Figure 3 d 切刀辊 is Figure 3 in d 砧辊 is Figure 3 in The transmission mechanism 6 is used to transmit power, and the cutting knife roller 4 and the anvil roller 5 can share one driving mechanism, so that one driving mechanism can be reduced.

[0072] According to some embodiments of the present application, optionally, the first roller body 41 further comprises a pressing knife block 414, a knife pad 415 and a first fastener 416, the pressing knife block 414, the blade 412 and the knife pad 415 are sequentially arranged from outside to inside, and the pressing knife block 414, the blade 412 and the knife pad 415 are fixed in the first groove 413 through the first fastener 416. In this way, the blade 412 can be conveniently replaced by disassembling the pressing knife block 414, and the diameter of the blade tip outer circle (the height of the blade tip protruding out of the outer circle of the base body) of the blade 412 can be conveniently adjusted by replacing the knife pad 415. The first fastener 416 is a fastening screw.

[0073] As shown in Figure 5 , one end of the first base body 411 is provided with a first groove 413, and the other end of the first base body 411 is also provided with a first groove 413, the pressing knife block 414, the blade 412 and the knife pad 415 are arranged in the upper first groove 413, and the lower first groove 413 is provided with a balance block 419, and the balance block 419 is fixed in the first groove 413 through a screw 420, so that the two ends of the first base body 411 are balanced in weight.

[0074] According to some embodiments of the present application, optionally, as shown in Figure 8 and Figure 9As shown, the second base body 511 is arranged with two or more first air holes 514 along the axial direction of the second roller body 51, and the first air holes 514 are in communication with each other. In this way, the flexible material on the second base body 511 is conveniently adsorbed through the first air holes 514 in communication with each other.

[0075] According to some embodiments of the present application, optionally, the second base body 511 is arranged with two or more second air holes 515 along the circumferential direction of the second roller body 51, and two adjacent first air holes 514 are in communication with a second air hole 515. In this way, the two or more second air holes 515 arranged in the circumferential direction can connect all the air holes together and share one negative pressure device.

[0076] According to some embodiments of the present application, optionally, the anvil 512 is fixed in the second groove by screws, rivets, welding, or adhesion. In this way, the screws and rivets are detachable connection, and the welding and adhesion are non-detachable connection, and the detachable connection is generally adopted.

[0077] According to some embodiments of the present application, optionally, as shown in Figure 3 The length cutting device further includes a pressing mechanism 7 arranged on the die frame 3, the pressing mechanism 7 is used to drive the cutter roller 4 to approach or move away from the anvil roller 5, the guide wheel 2 is arranged on one side of the anvil roller 5, and the traction mechanism 1 is arranged on one side of the guide wheel 2. In this way, the pressing mechanism 7 is used to apply working pressure to the cutter roller 4, which can adopt a pneumatic cylinder or a screw rod.

[0078] In other embodiments, the length cutting device further includes two driving units, the two driving units respectively drive the cutter roller 4 and the anvil roller 5 to rotate, so that the cutter roller 4 and the anvil roller 5 rotate at a fixed proportional linear speed. In this way, the transmission mechanism can be omitted, and the rotating speed and direction of the cutter roller 4 and the anvil roller 5 can be controlled separately.

[0079] According to some embodiments of the present application, optionally, as shown in Figure 1 The tip of the blade 412 is V-shaped in cross section, and the top of the anvil 512 is provided with a smooth contact surface. The width of the smooth contact surface at the top of the anvil 512 is 5-10 mm, which facilitates the contact and cutting of the blade 412 with the anvil 512 within a range.

[0080] According to some embodiments of the present application, optionally, the length cutting device is applied to the length cutting of the positive and negative electrode separator materials of new energy batteries. In this way, the length cutting of the positive and negative electrode separator materials of the batteries can be conveniently realized, and the length cutting device is not limited to the length cutting of the positive and negative electrode separator materials of new energy batteries, but can be widely applied to the length cutting of flexible materials.

[0081] Different from the prior art, in the embodiment, the flexible material enters the anvil roller 5 with adsorption holes through the traction mechanism 1 and the material guide wheel 2, the anvil roller 5 is used for adsorbing and conveying the flexible material, the flexible material enters between the cutter roller 4 and the anvil roller 5 at a preset speed, the linear speed of the anvil roller 5 is the same as the material conveying speed, the cutter roller 4 and the anvil roller 5 relatively rotate at a fixed proportion of linear speed, the blade 412 provided on the outer circle of the cutter roller 4 and the anvil 512 provided on the outer circle of the anvil roller 5 are in contact once with zero gap between the blade tip of the blade 412 and the outer circle surface of the anvil 512 after a preset number of relative rotations, and the cutting of the flexible material of a certain length is accurately completed; since the blade tip of the blade 412 of the cutter roller 4 and the outer circle surface of the anvil 512 of the anvil roller 5 are both higher than the position of the base body, only when the blade 412 is turned to the position opposite to the anvil 512, the blade tip of the blade 412 will be in contact with the outer circle surface of the anvil 512 to generate the cutting action, and the blade tip will not be in contact at other times; the fast and accurate cutting of the flexible material of a relatively long length can be realized by using a relatively small cutter roller 4 and anvil roller 5, the production efficiency of the fixed-length cutting of the flexible material of a relatively long length is improved, the size precision of the fixed length is improved, and the waste of the material is reduced.

[0082] It should be noted that although the above embodiments have been described in the present text, the patent protection scope of the present application is not limited thereby. Therefore, based on the innovative idea of the present application, the changes and modifications made to the embodiments described in the present text, or the equivalent structure or equivalent process transformation made by using the content of the present application specification and drawings, directly or indirectly apply the above technical solutions to other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A fixed-length rolling cutting device for flexible materials, characterized in that, include: A traction mechanism is used to transport flexible materials to a downstream device at a preset speed. A guide wheel, located behind the traction mechanism; A mold frame, located behind the guide roller; A cutting roller is disposed on the mold frame. The cutting roller includes a first roller body and a first mandrel. The first roller body is sleeved on the first mandrel. The first roller body includes a first base and a blade. The first base is provided with a first groove along the axial direction of the first roller body. The blade is disposed in the first groove along the axial direction of the first roller body. The tip of the blade protrudes from the outer circle of the first base. An anvil roller is mounted on the mold frame and located on one side of the cutter roller. The traction mechanism and the guide wheel are used to feed flexible material between the cutter roller and the anvil roller at a preset speed. The anvil roller includes a second roller body and a second mandrel. The second roller body is sleeved on the second mandrel. The second roller body includes a second base and an anvil. The second base is provided with two or more air suction holes. The second base is provided with a second groove along the axial direction of the second roller body. The anvil is provided in the second groove along the axial direction of the second roller body and protrudes from the outer circle of the second base. In this process, after the blade on the outer circle of the cutting roller and the anvil on the outer circle of the anvil roller rotate relative to each other a preset number of times, the blade tip makes zero-gap contact with the outer circle surface of the anvil once, thus accurately completing the cutting of a certain length of flexible material. as well as An air distribution plate is used to provide negative or positive pressure to the air intake holes of the anvil roller, so that the anvil roller adsorbs or releases flexible material.

2. The fixed-length rolling cutting device for flexible materials according to claim 1, characterized in that, The fixed-length rolling cutting device further includes a drive mechanism and a transmission mechanism. The drive mechanism drives the cutting roller to rotate. The cutting roller is connected to the anvil roller through the transmission mechanism, so that the cutting roller and the anvil roller rotate relative to each other at a fixed ratio of linear velocity. The transmission ratio of the transmission mechanism is equal to the ratio of the diameter of the first roller body of the cutting roller to the diameter of the second roller body of the anvil roller. This is used to ensure that after the blade set on the outer circle of the cutting roller and the anvil set on the outer circle of the anvil roller rotate relative to each other a preset number of times, the blade tip makes zero-gap contact with the outer circle surface of the anvil once, thus accurately completing the cutting of a certain length of flexible material.

3. The fixed-length rolling cutting device for flexible materials according to claim 2, characterized in that, The first roller body also includes a pressure block, a blade pad, and a first fastener. The pressure block, the blade, and the blade pad are arranged sequentially from the outside to the inside. The pressure block, the blade, and the blade pad are fixed in the first groove by the first fastener.

4. The fixed-length rolling cutting device for flexible materials according to claim 1, characterized in that, The second substrate has two or more first suction holes arranged along the axial direction of the second roller, and the first suction holes are interconnected.

5. The fixed-length rolling cutting device for flexible materials according to claim 4, characterized in that, The second substrate has two or more second suction holes arranged circumferentially along the second roller body, and two adjacent first suction holes are connected to one second suction hole.

6. The fixed-length rolling cutting device for flexible materials according to claim 1, characterized in that, The anvil is fixed in the second groove by screws, rivets, welding, or adhesive.

7. The fixed-length rolling cutting device for flexible materials according to claim 1, characterized in that, The fixed-length rolling cutting device also includes two driving units, which drive the cutting roller and the anvil roller to rotate respectively, so that the cutting roller and the anvil roller rotate relative to each other at a fixed ratio of linear velocity.

8. The fixed-length rolling cutting device for flexible materials according to claim 1, characterized in that, The blade tip has a V-shaped cross-section, and the anvil has a smooth contact surface at its top.

9. The fixed-length rolling cutting device for flexible materials according to any one of claims 1-8, characterized in that, The fixed-length rolling cutting device also includes a pressure mechanism, which is disposed on the mold frame. The pressure mechanism is used to drive the cutting roller to move closer to or away from the anvil roller and to apply working pressure. The guide wheel is disposed on one side of the anvil roller, and the traction mechanism is disposed on one side of the guide wheel.

10. The fixed-length rolling cutting device for flexible materials according to claim 1, characterized in that, The fixed-length rolling cutting device is used for rolling cutting the positive and negative electrode separator materials of new energy batteries.

Images