Slitting system for lithium battery base membrane

Abstract

The utility model discloses a slitting system for a lithium battery base membrane, relates to the technical field of lithium battery vehicle membrane preparation, and can solve the problem that the slitting quality of the base membrane is easily substandard when a suspended slitting knife in the prior art has swinging edges and raised grains on the base membrane. The slitting system of the lithium battery base membrane comprises a lower cutter shaft used for supporting unfolding of the base membrane, a cutter mounting table arranged parallel to the lower cutter shaft and a plurality of slitting mechanisms, each slitting mechanism comprises a driving part and a cutter head assembly arranged at the output end of the driving part, the driving parts are arranged on the cutter mounting table, and the cutter head assemblies are arranged on the cutter mounting table. The cutter head assembly comprises a slitting cutter body arranged towards the lower cutter shaft. The lower cutter shaft is provided with a plurality of annular cutter grooves matched with the slitting cutter bodies.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery diaphragm preparation, in particular to a lithium battery base film cutting system. Background Art

[0002] Lithium battery separators are the core materials in the lithium battery manufacturing process. The production process mainly includes base film manufacturing and base film coating. During the base film manufacturing process, the width of the film is relatively large, which can reach more than ten meters. It usually requires slitting, winding and other processes before being transported to the subsequent workshop for coating.

[0003] The slitting process of lithium battery base film is usually completed by the slitting system. The main function of the slitting system is to pass the film raw material released from the unwinding mechanism through the tension detection roller, flattening roller, guide rollers, and correction system, and then enter the slitting mechanism. After the base film is slit, it is rewound into film rolls that meet the requirements by the rewinding mechanism. Figure 1 As shown, the current cutting knife mechanism usually has a straight knife that extends into the suspended base film, which makes it inconvenient to adjust the cutting width of the base film, and there is an error in the width of the product after cutting. In addition, when the base film is constantly moving, once there are wavy edges and wave patterns, the existing straight-in suspended cutter has problems such as continuous cutting, edge tearing, and burrs after cutting, resulting in low quality of the base film after slitting and failure to meet the quality requirements of the slitting products.

[0004] In view of the above problems, the inventor has designed a lithium battery base film slitting system that can solve one or more of the above problems, and thus proposed the present application. Utility Model Content

[0005] The present application provides a lithium battery base film slitting system, which is used to solve the problem in the prior art that the base film slitting quality is easily substandard when the base film has wavy edges and waves.

[0006] In order to solve the above technical problems, the utility model adopts the following solutions:

[0007] The present application provides a lithium battery base film slitting system, comprising a lower knife shaft for supporting the unfolding of the base film and a cutter mounting platform arranged parallel to the lower knife shaft, and a plurality of slitting mechanisms, wherein:

[0008] The slitting mechanism includes a driving member and a cutter head assembly arranged at the output end of the driving member, the driving member is arranged on the cutter mounting table, and the cutter head assembly includes a slitting cutter body arranged toward the lower cutter shaft;

[0009] The lower knife shaft is provided with a plurality of annular knife grooves adapted to the slitting knife body.

[0010] Preferably, the slitting mechanism further comprises a cylinder mounting seat slidably connected to the lower cutter shaft along the axial direction thereof, and a locking screw penetrating the cylinder mounting seat;

[0011] The driving member is a linear driving cylinder, and the driving cylinder is arranged on a cylinder mounting seat.

[0012] Preferably, the head of the locking screw is provided with a limit head, and the slitting mechanism further comprises a clamping piece arranged close to the limit head, and the clamping piece is sleeved on the locking screw;

[0013] The cutter mounting platform is provided with a locking plate which is arranged axially parallel to the lower cutter shaft, and the clamping sheet and the cylinder mounting seat are respectively located on both sides of the locking plate.

[0014] Preferably, the cutter mounting platform is provided with a scale parallel to the axial direction of the lower cutter shaft;

[0015] A position indicating head used in conjunction with a ruler is arranged on the cylinder mounting seat.

[0016] Preferably, the annular cutter grooves of the lower cutter shaft are evenly distributed along its axial direction;

[0017] The depth of the annular groove ranges from 2mm to 6mm;

[0018] The width of the annular groove ranges from 1mm to 5mm;

[0019] The spacing of the annular knife grooves ranges from 3 mm to 10 mm.

[0020] Preferably, the cutter head assembly comprises a connecting seat plate, a cutter mounting seat, a slitting knife body, a cutter pressing sheet, a pressing sheet locking plate and an adjusting knob which are sequentially distributed along the axial direction of the lower cutter shaft;

[0021] The connecting seat plate is arranged vertically and fixedly connected to the output end of the driving member;

[0022] The slitting knife body is pressed between the slitting knife mounting seat and the slitting knife pressing plate, and the blade of the slitting knife body protrudes outwards from the slitting knife mounting seat and the slitting knife pressing plate;

[0023] The slitting knife body and the slitting knife pressing piece are pressed onto the slitting knife mounting seat through the pressing piece locking plate;

[0024] The adjusting knob passes through the pressing piece locking plate and is threadedly connected with the connecting seat plate.

[0025] Preferably, the cutter mounting seat is circular in shape, and the cutter body is annular or square in shape.

[0026] Preferably, the slitting knife body is in a square shape;

[0027] A plurality of cutter pressing sheets are provided, and the plurality of cutter pressing sheets are evenly distributed along the circumference of the adjusting knob.

[0028] Preferably, the slitting mechanism also includes a shield assembly for protecting the cutter head assembly, the shield assembly is fixedly connected to the driving member, the cutter head assembly is located in the shield assembly, and the shield assembly is provided with an exposed blade edge on one side facing the lower knife shaft for partially passing the slitting knife body.

[0029] Preferably, the shield assembly comprises an L-shaped bottom shell and a side plate fixed on the driving member, and a flap connected to the top flap of the side plate, the side plate is arranged vertically and close to the connecting seat plate, and the side plate is located on the side of the connecting seat plate away from the adjusting knob;

[0030] The exposed blade edge is arranged on one side of the L-shaped bottom shell close to the lower blade shaft.

[0031] Beneficial effects of the utility model:

[0032] 1. The present application provides a lower knife shaft with an annular knife groove, and a slitting knife body that can be extended into the annular knife groove after being driven by a driving member, so that the lower knife shaft can be supported and unfolded during the entire slitting process of the base film. When the base film moves and encounters wavy edges, wavy patterns, etc., the problems of continuous slitting, rough edges after cutting, and torn edges that may occur in the current slitting with a suspended knife will not occur.

[0033] Second, the present application can be provided with multiple cutting blades and slitting blade bodies, and the slitting blade body extending into the annular blade groove can be adjusted by loosening and tightening the adjustment knob, thereby avoiding the problem of the existing technology that the cutting blade is more troublesome to replace and adjust after being worn.

[0034] 3. Since the angle of the slitting knife body of the present application can be adjusted by adjusting the knob, the slitting knife pressure piece and other structures, after one side of the square slitting knife body is worn, it can be adjusted and used on the other side. After a part of the area of ​​the annular slitting knife body is worn, it can be adjusted and used on the rest for cutting. Compared with the prior art, the service life of the slitting knife can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of the prior art of this application.

[0036] Figure 2 It is a schematic diagram of the top structure of an embodiment of the present application.

[0037] Figure 3 It is a schematic diagram of the top view of the structure of the embodiment of the present application during use.

[0038] Figure 4 This is a schematic top view of the slitting mechanism in the embodiment of the present application;

[0039] Figure 5 It is a left side schematic diagram of the slitting mechanism in the embodiment of the present application;

[0040] Figure 6 It is a schematic diagram of the three-dimensional structure of the cutter head seat assembly of the slitting mechanism in the embodiment of the present application;

[0041] Description of reference numerals:

[0042] 11-guide shaft, 12-limiting shaft, 21-suspended knife seat, 22-suspended cutter, 3-lower knife shaft, 301-annular knife groove, 4-slitting mechanism, 41-driving cylinder, 42-knife head assembly, 421-connecting seat plate, 422-cutter mounting seat, 423-cutter pressure sheet, 424-slitting knife body, 425-pressure sheet locking plate, 426-adjusting knob, 43-protective cover assembly, 431-L-shaped bottom shell, 432-flip cover, 433-side plate, 434-exposed knife edge, 44-cylinder mounting seat, 45-locking screw, 46-position indicator head, 47-clamping plate, 5-cutter mounting table, 51-ruler, 52-locking plate. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal",

[0045] The directions or positional relationships indicated by “inside”, “outside”, “front”, “back”, “top”, “bottom”, etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0046] The terms "disposed", "opened", "installed", "connected" and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, or they can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] Reference Figures 2 to 6 As shown, this embodiment provides a lithium battery base film slitting system, including a lower knife shaft 3 for supporting the base film to unfold, a cutter mounting platform 5 arranged parallel to the lower knife shaft 3, and a plurality of slitting mechanisms 4, wherein:

[0049] The slitting mechanism 4 includes a driving member and a cutter head assembly 42 arranged at the output end of the driving member, the driving member is arranged on the cutter mounting platform 5, and the cutter head assembly 42 includes a slitting knife body 424 arranged toward the lower knife shaft 3;

[0050] The lower knife shaft 3 is provided with a plurality of annular knife grooves 301 adapted to the slitting knife body 424 .

[0051] The cutting mechanism in the prior art is as follows Figure 1 As shown, the cutter mechanism in the prior art mainly includes a guide shaft 11 and a limit shaft 12, as well as a suspended knife seat 21 installed on the guide shaft 11 and a suspended cutter 22 installed on the suspended knife seat 21. The suspended knife seat 21 can adjust the cutting position along the axial direction of the guide shaft 11, but because the suspended cutter 22 does not have any support in the part of cutting the base film, once the base film has wavy edges, wavy patterns, etc. during movement, the position of the base film and the suspended cutter 22 will change with the wave-like movement of the base film. The more serious the wavy edges, wavy patterns, etc. are, the more likely it is that problems such as continuous cutting, rough edges after cutting, and torn edges will occur.

[0052] In this embodiment, the lower blade shaft 3 with an annular blade groove 301 and the slitting blade body 424 that can be extended into the annular blade groove 301 after being driven by a driving member can be supported and unfolded by the lower blade shaft 3 during the entire slitting process of the base film. When the base film moves and encounters wavy edges and waves, the problems of continuous slitting, rough edges after slitting, and torn edges that may occur in the current slitting by the slitting blade in mid-air will not occur. Therefore, the core concept of this application is to provide a stable support for the slitting blade body 424 to cut the base film, while not affecting the slitting action of the slitting blade body 424, thereby solving the cutting quality problem encountered by the base film in mid-air cutting.

[0053] Specifically, the slitting mechanism 4 further includes a cylinder mounting seat 44 slidably connected to the lower knife shaft 3 along the axial direction thereof, and a locking screw 45 penetrating the cylinder mounting seat 44;

[0054] The driving member is a linear driving cylinder 41, which is arranged on a cylinder mounting seat 44. The driving cylinder 41 can drive the slitting knife body 424 to approach or move away from the annular knife groove 301 of the lower knife shaft 3, so as to facilitate operations such as replacing the slitting knife body 424 for cutting the base film or adjusting the position of the slitting mechanism 4.

[0055] In some preferred embodiments, the head of the locking screw 45 is provided with a limit head, and the slitting mechanism 4 further includes a clamping piece 47 arranged near the limit head, and the clamping piece 47 is sleeved on the locking screw 45;

[0056] The cutter mounting platform 5 is provided with a locking plate 52 arranged parallel to the axial direction of the lower cutter shaft 3, and the clamping piece 47 and the cylinder mounting seat 44 are respectively located on both sides of the locking plate 52. In this embodiment, the locking screw 45 is threadedly connected to the cylinder mounting seat 44, and by screwing the locking screw 45, the limit head can be driven to approach or move away from the cylinder mounting seat 44, thereby pushing the clamping piece 47 to press the locking plate 52 or loosen the locking plate 52, so as to achieve the position fixing or adjustment of the driving cylinder 41.

[0057] In some preferred embodiments, the cutter mounting platform 5 is provided with a scale 51 parallel to the axial direction of the lower cutter shaft 3;

[0058] A position indicating head 46 used in conjunction with a scale 51 is provided on the cylinder mounting seat 44. By providing the scale 51 and the position indicating head 46, the position of the slitting mechanism 4 can be conveniently observed and adjusted.

[0059] In some preferred embodiments, the annular cutter grooves 301 of the lower cutter shaft 3 are evenly distributed along its axial direction;

[0060] The depth of the annular knife groove 301 ranges from 2 mm to 6 mm;

[0061] The width of the annular knife groove 301 ranges from 1 mm to 5 mm;

[0062] The spacing of the annular knife groove 301 ranges from 3 mm to 10 mm. In this embodiment, the depth of the annular knife groove 301 is 3 mm, the width is 1.5 mm, and the spacing is 5 mm. In some embodiments, the depth of the annular knife groove 301 can also be 4 mm, 5 mm, etc., the width can also be 2 mm, 2.5 mm, etc., and the spacing can also be 4 mm, 6 mm, etc. The technicians can adjust according to the slitting requirements or needs of the product, and no examples are given here.

[0063] In some preferred embodiments, the cutter head assembly 42 includes a connecting seat plate 421, a cutter mounting seat 422, a slitting knife body 424, a cutter pressing piece 423, a pressing piece locking plate 425 and an adjusting knob 426 which are sequentially distributed along the axial direction of the lower cutter shaft 3;

[0064] The connecting seat plate 421 is vertically arranged and fixedly connected to the output end of the driving member;

[0065] The slitting knife body 424 is pressed between the slitting knife mounting seat 422 and the slitting knife pressing plate 423, and the blade of the slitting knife body 424 protrudes outward from the slitting knife mounting seat 422 and the slitting knife pressing plate 423;

[0066] The slitting knife body 424 and the slitting knife pressing piece 423 are pressed onto the slitting knife mounting seat 422 through the pressing piece locking plate 425;

[0067] The adjusting knob 426 penetrates the pressing plate locking plate 425 and is threadedly connected to the connecting seat plate 421. The connecting seat plate 421 is fixed on the output end of the driving cylinder 41, and the cutter mounting seat 422 is fitted on the connecting seat plate 421. The slitting knife body 424 is pressed on the cutter mounting seat 422 through the cutter pressing plate 423, and the cutter pressing plate 423 is pressed through the pressing plate locking plate 425. The adjusting knob 426 penetrates the pressing plate locking plate 425. When the adjusting knob 426 is loosened, the pressing plate locking plate 425 and the cutter pressing plate 423 are both in a relaxed state. At this time, the slitting knife body 424 can be replaced, and the angles of the pressing plate locking plate 425 and the cutter pressing plate 423 can be rotated to adjust the position of the slitting knife body 424. When the adjusting knob 426 is tightened, the positions of the slitting knife body 424, the cutter pressing plate 423 and the pressing plate locking plate 425 are fixed.

[0068] In some preferred embodiments, the shape of the cutter mounting seat 422 is circular, and the shape of the slitting knife body 424 is annular (not shown in the figure) or square. In some embodiments, the slitting knife body 424 can be in a circular ring, a square ring, etc., and its blade shape can also be a pentagon, a hexagon, etc., which can be set by technicians according to their needs, and no examples are given here.

[0069] Specifically, in this embodiment, if Figure 5 and Figure 6 As shown, the slitting knife body 424 is in the shape of a square;

[0070] The cutter pressing sheet 423 is provided with multiple pieces, and the multiple cutter pressing sheets 423 are evenly distributed along the circumference of the adjusting knob 426. In this embodiment, the cutter pressing sheet 423 is provided with four pieces, and is evenly distributed along the circumference of the adjusting knob 426.

[0071] In some preferred embodiments, the slitting mechanism 4 further includes a shield assembly for protecting the cutter head assembly 42, the shield assembly is fixedly connected to the driving member, the cutter head assembly 42 is located in the shield assembly, and the shield assembly is provided with a knife opening 434 for partially passing the slitting knife body 424 on one side facing the lower knife shaft 3. By providing the shield assembly, the cutter head assembly 42 can be protected to prevent the cutter head assembly 42 from being directly exposed to the outside.

[0072] Specifically, the shield assembly includes an L-shaped bottom shell 431 and a side plate 433 fixed on the driving member, and a flap 432 connected to the top flap of the side plate 433, the side plate 433 is vertically arranged close to the connecting seat plate 421, and the side plate 433 is located on the side of the connecting seat plate 421 away from the adjusting knob 426;

[0073] The exposed blade edge 434 is arranged on one side of the L-shaped bottom shell 431 close to the lower blade shaft 3. A flip cover 432 connected to the side plate 433 is arranged to facilitate the installation and adjustment of the slitting blade of the blade head assembly 42.

[0074] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A lithium battery base film cutting system, characterized in that: It comprises a lower knife shaft (3) for supporting the unfolding of the base film, a cutter mounting platform (5) arranged parallel to the lower knife shaft (3), and a plurality of slitting mechanisms (4), wherein: The slitting mechanism (4) comprises a driving member and a cutter head assembly (42) arranged at the output end of the driving member, the driving member is arranged on a cutter mounting platform (5), and the cutter head assembly (42) comprises a slitting knife body (424) arranged toward the lower cutter shaft (3); The lower knife shaft (3) is provided with a plurality of annular knife grooves (301) adapted to the slitting knife body (424).

2. A lithium battery substrate slitting system according to claim 1, characterized in that: The slitting mechanism (4) further comprises a cylinder mounting seat (44) slidably connected to the lower cutter shaft (3) along the axial direction thereof, and a locking screw (45) arranged to penetrate the cylinder mounting seat (44); The driving member is a linear driving cylinder (41), and the driving cylinder (41) is arranged on a cylinder mounting seat (44).

3. A lithium battery substrate slitting system according to claim 2, characterized in that: The head of the locking screw (45) is provided with a limit head, and the slitting mechanism (4) further comprises a clamping piece (47) arranged close to the limit head, and the clamping piece (47) is sleeved on the locking screw (45); The cutter mounting platform (5) is provided with a locking plate (52) arranged axially parallel to the lower cutter shaft (3), and the clamping piece (47) and the cylinder mounting seat (44) are respectively located on both sides of the locking plate (52).

4. A lithium battery substrate slitting system according to claim 2, characterized in that: The cutter mounting platform (5) is provided with a scale (51) parallel to the axial direction of the lower cutter shaft (3); A position indicating head (46) used in conjunction with a scale (51) is arranged on the cylinder mounting seat (44).

5. The lithium battery substrate slitting system according to claim 1, characterized in that: The annular cutter grooves (301) of the lower cutter shaft (3) are evenly distributed along its axial direction; The depth of the annular knife groove (301) ranges from 2 mm to 6 mm; The width of the annular knife groove (301) ranges from 1 mm to 5 mm; The spacing of the annular knife grooves (301) ranges from 3 mm to 10 mm.

6. A lithium battery substrate slitting system according to claim 1, characterized in that: The cutter head assembly (42) comprises a connecting seat plate (421), a cutter mounting seat (422), a cutter body (424), a cutter pressing sheet (423), a pressing sheet locking plate (425) and an adjusting knob (426) which are sequentially distributed along the axial direction of the lower cutter shaft (3); The connecting seat plate (421) is vertically arranged and fixedly connected to the output end of the driving member; The slitting knife body (424) is pressed between the slitting knife mounting seat (422) and the slitting knife pressing plate (423), and the blade of the slitting knife body (424) protrudes outward from the slitting knife mounting seat (422) and the slitting knife pressing plate (423); The slitting knife body (424) and the slitting knife pressing piece (423) are pressed onto the slitting knife mounting seat (422) via a pressing piece locking plate (425); The adjusting knob (426) passes through the pressing piece locking plate (425) and is threadedly connected to the connecting seat plate (421).

7. A lithium battery substrate slitting system according to claim 6, characterized in that: The cutter mounting seat (422) is circular in shape, and the cutter body (424) is annular or square in shape.

8. A lithium battery substrate slitting system according to claim 7, characterized in that: The slitting knife body (424) is in a square shape; A plurality of cutter pressing sheets (423) are provided, and the plurality of cutter pressing sheets (423) are evenly distributed along the circumference of the adjusting knob (426).

9. A lithium battery substrate slitting system according to claim 6, characterized in that: The slitting mechanism (4) also includes a shield assembly for protecting the cutter head assembly (42), the shield assembly being fixedly connected to the driving member, the cutter head assembly (42) being located inside the shield assembly, and a blade opening (434) for partially passing the slitting knife body (424) is provided on one side of the shield assembly facing the lower knife shaft (3).

10. A lithium battery substrate slitting system according to claim 9, characterized in that: The shield assembly comprises an L-shaped bottom shell (431) and a side plate (433) fixed on the driving member, and a flap (432) connected to the top of the side plate (433), the side plate (433) being arranged vertically and close to the connecting seat plate (421), and the side plate (433) being located on a side of the connecting seat plate (421) away from the adjusting knob (426); The exposed blade edge (434) is arranged on a side of the L-shaped bottom shell (431) close to the lower blade shaft (3).

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