Slitting knife and lithium battery diaphragm slitting device

Abstract

The utility model discloses a slitting knife and a lithium battery diaphragm slitting device, the slitting knife comprises a first knife rest and a second knife rest, a knife body is arranged between the first knife rest and the second knife rest, one end of the knife body is provided with a blade part, and the blade part extends out of the first knife rest and the second knife rest; a plastic sheet body is arranged on the opposite side of the first knife rest and / or the second knife rest, and a film separating plastic sheet is arranged at one end of the plastic sheet body; the shape of the part, flush with the knife edge of the blade part, of the film separation plastic sheet is a shape which is gradually bent towards the direction away from the blade part from one end to the other end. According to the slitting knife and the lithium battery diaphragm slitting device disclosed by the utility model, the split type slitting knife is designed, the diaphragm splitting plastic sheet is assembled on the slitting knife, and two diaphragms which are cut by the blade part can naturally expand along the diaphragm splitting plastic sheet, so that a gap between the diaphragms is enlarged, normal operation of defect identification is not interfered, and the slitting knife and the lithium battery diaphragm slitting device are simple in structure and convenient to use. And meanwhile, the roller arrangement for independently collecting the diaphragms subsequently is also convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm cutting, in particular to a slitting knife and a lithium battery diaphragm slitting device. Background Art

[0002] In the production of lithium battery diaphragms, it is necessary to cut wide diaphragms into several narrow diaphragms for further processing. In the traditional slitting method, after the slitting knife cuts the diaphragm, the cut diaphragm continues to be transported backwards, but at this time, the edges of the two cut diaphragms may overlap. In the subsequent visual defect detection, the overlapping diaphragms may be identified as waste films, which brings unnecessary workload to the normal defect detection.

[0003] In order to solve the above problems, we propose a slitting knife and a lithium battery separator slitting device. Utility Model Content

[0004] In order to solve the deficiencies in the prior art, the utility model provides a slitting knife and a lithium battery diaphragm slitting device. The slitting knife and the lithium battery diaphragm slitting device are designed with a split slitting knife and a slitting plastic sheet is installed on the slitting knife. The shape design of the slitting plastic sheet at the blade part of the knife body allows the diaphragm cut by the blade part to naturally expand along the slitting plastic sheet, thereby expanding the gap between the diaphragms. This not only ensures that the normal defect identification will not be interfered with, but also facilitates the subsequent arrangement of rollers for independently collecting the diaphragms.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] On the one hand, the utility model provides a slitting knife, comprising a first knife holder and a second knife holder, a knife body is arranged between the first knife holder and the second knife holder, a blade portion is arranged at one end of the knife body and the blade portion extends out of the first knife holder and the second knife holder;

[0007] A plastic sheet body is arranged on the opposite sides of the first tool holder and / or the second tool holder, and a film-separating plastic sheet is arranged at one end of the plastic sheet body;

[0008] The film-splitting plastic sheet extends to the blade and is flush with the cutting edge of the blade;

[0009] The shape of the film-splitting plastic sheet at the position flush with the cutting edge of the blade is a shape that gradually bends from one end to the other end in a direction away from the blade.

[0010] The slitting knife of the utility model is assembled by placing the knife body between the first knife holder and the second knife holder, and fixing the knife body by using the first knife holder and the second knife holder, and then assembling the plastic sheet body on the first knife holder and / or the second knife holder so that the film-slitting plastic sheet is flush with the blade of the knife body. When the blade of the knife body is working, the diaphragm cut by the blade will immediately generate a certain displacement outward along the curved surface of the film-slitting plastic sheet, and the displacement amount depends on the design of the bending amplitude to meet the needs of subsequent visual inspection and the possible roller arrangement design for independently collecting the diaphragm.

[0011] In a further technical solution, the first tool holder and the second tool holder are provided with tool placement grooves on opposite side surfaces, respectively, and the tool placement grooves extend from the same side surface of the first tool holder and the second tool holder;

[0012] The shape of the knife body matches the shape surrounded by the two knife grooves.

[0013] By providing a knife groove and embedding the knife body in the knife groove, the overall structure of the slitting knife is more compact, the installation is tighter, and the structural stability is better.

[0014] In a further technical solution, a second mounting hole is arranged in the tool placement groove, and a tool mounting hole is correspondingly arranged on the tool body.

[0015] The fixed installation of the tool body is achieved through the matching tool installation hole and the second installation hole, and the connection stability between the tool body and the first tool holder or the second tool holder is higher, and the fixing effect is better.

[0016] In a further technical solution, plastic sheet installation grooves are respectively provided on opposite sides of the first tool holder and the second tool holder.

[0017] The plastic sheet body is installed and fixed by the plastic sheet installation groove, which further makes the overall structure of the slitting knife more compact and the connection stability better.

[0018] In a further technical solution, a third mounting hole is provided on the plastic sheet mounting groove, and a plastic sheet mounting hole is provided on the plastic sheet body.

[0019] The plastic sheet body is installed and fixed through the plastic sheet installation hole and the third installation hole, and the fixing effect is good.

[0020] In a further technical solution, tool holder mounting grooves are provided on the first tool holder and the second tool holder.

[0021] By providing the knife holder installation groove, it is convenient to install and fix the slitting knife and the knife holder of the diaphragm slitting device.

[0022] In a further technical solution, the film-separating plastic sheet is arranged close to the blade of the knife body.

[0023] Since the diaphragm will be transported along the film-splitting plastic sheet immediately after being cut by the blade, the film-splitting plastic sheet is arranged close to the blade to facilitate the smooth transportation of the diaphragm and avoid the situation where the diaphragm is stuck between the film-splitting plastic sheet and the blade.

[0024] In a further technical solution, the first tool holder and the second tool holder are respectively provided with first mounting holes for mounting and fixing the first tool holder and the second tool holder.

[0025] By providing the first mounting hole, the first tool holder and the second tool holder can be tightly fixed to avoid relative displacement between the first tool holder and the second tool holder, which would affect the slitting quality.

[0026] On the other hand, the utility model also provides a lithium battery diaphragm slitting device, including a knife rack and a defect detection device, wherein the knife rack is equipped with a plurality of slitting knives as described in any of the above technical solutions.

[0027] The slitting knife and lithium battery diaphragm slitting device of the utility model are designed with a split slitting knife and a slitting plastic sheet is installed on the slitting knife. The shape design of the slitting plastic sheet at the blade part of the knife body enables the two diaphragms cut by the blade part to naturally expand along the slitting plastic sheet, thereby expanding the gap between the diaphragms. This not only ensures that the normal defect identification will not be interfered with, but also facilitates the subsequent arrangement of rollers for independently collecting the diaphragms.

[0028] The beneficial effects are:

[0029] 1. The slitting knife and lithium battery diaphragm slitting device of the utility model are designed with a split slitting knife, and a slitting plastic sheet is installed on the slitting knife. The shape design of the slitting plastic sheet at the blade of the knife body allows the two diaphragms cut by the blade to naturally expand along the slitting plastic sheet, thereby expanding the gap between the diaphragms. This not only ensures that the normal defect identification will not be interfered with, but also facilitates the subsequent arrangement of rollers for independently collecting the diaphragms.

[0030] 2. By setting a knife groove and embedding the knife body in the knife groove, the overall structure of the slitting knife is more compact, the installation is tighter, and the structural stability is better.

[0031] 3. The tool body is fixedly installed by matching the tool installation hole and the second installation hole, and the connection stability between the tool body and the first tool holder or the second tool holder is higher, and the fixing effect is better.

[0032] 4. The plastic sheet body is installed and fixed through the plastic sheet installation groove, which further makes the overall structure of the slitting knife more compact and the connection stability better.

[0033] 5. The plastic sheet body is installed and fixed through the plastic sheet installation hole and the third installation hole, and the fixing effect is good.

[0034] 6. By setting the knife holder installation groove, it is convenient to install and fix the slitting knife and the knife holder of the diaphragm slitting device.

[0035] 7. Since the diaphragm will be transported along the film-splitting plastic sheet immediately after being cut by the blade, the film-splitting plastic sheet is arranged close to the blade to facilitate the smooth transportation of the diaphragm and avoid the situation where the diaphragm is stuck between the film-splitting plastic sheet and the blade.

[0036] 8. By setting the first mounting hole, the first tool holder and the second tool holder can be tightly fixed to avoid relative displacement between the first tool holder and the second tool holder, which affects the slitting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the split three-dimensional structure of the slitting knife of the embodiment of the utility model;

[0038] Figure 2 It is a schematic diagram of the assembled structure of the slitting knife of the embodiment of the utility model;

[0039] Figure 3 It is a schematic diagram of the shape structure of the cutting edge of the slitting knife and the film-slitting plastic sheet in an embodiment of the utility model;

[0040] Figure 4 It is a schematic diagram of the assembled three-dimensional structure of the slitting knife of the embodiment of the utility model.

[0041] 10. First tool holder; 11. First mounting hole; 12. Tool holder mounting slot; 13. Plastic sheet mounting slot; 14. Third mounting hole; 20. Second tool holder; 21. Second mounting hole; 22. Tool slot; 30. Tool body; 31. Blade; 32. Tool mounting hole; 40. Plastic sheet body; 41. Plastic sheet mounting hole; 42. Film-separating plastic sheet. DETAILED DESCRIPTION

[0042] The utility model is further described below in conjunction with the accompanying drawings:

[0043] Example:

[0044] A slitting knife and a lithium battery diaphragm slitting device, such as Figure 1 As shown, it includes a first tool holder 10 and a second tool holder 20, a tool body 30 is arranged between the first tool holder 10 and the second tool holder 20, and a blade portion 31 is arranged at one end of the tool body 30 and the blade portion 31 extends out of the first tool holder 10 and the second tool holder 20;

[0045] A plastic sheet body 40 is disposed on the opposite sides of the first tool holder 10 and / or the second tool holder 20, and a film-separating plastic sheet 42 is disposed at one end of the plastic sheet body 40;

[0046] The film-splitting plastic sheet 42 extends to the blade portion 31 and is flush with the edge of the blade portion 31;

[0047] The shape of the film-separating plastic sheet 42 at the position flush with the cutting edge of the blade 31 is a shape that gradually bends from one end to the other end in a direction away from the blade 31 .

[0048] The slitting knife of the utility model is assembled by placing the knife body 30 between the first knife holder 10 and the second knife holder 20, and fixing the knife body 30 by using the first knife holder 10 and the second knife holder 20, and then assembling the plastic sheet 40 on the first knife holder 10 and / or the second knife holder 20, so that the film-splitting plastic sheet 42 is flush with the blade 31 of the knife body 30. Figure 2 and Figure 4 As shown, when the blade 31 of the blade body 30 is working, Figure 3 As shown, the membrane cut by the blade 31 is then displaced outward along the curved surface of the membrane-splitting plastic sheet 42. The amount of displacement depends on the design of the bending amplitude to meet the needs of subsequent visual inspection and possible roller arrangement design for independently collecting the membrane.

[0049] In this embodiment, the first tool holder 10, the second tool holder 20 and the tool body 30 are fixed by clamping when they are installed on the tool holder of the diaphragm slitting device.

[0050] In this embodiment, the plastic sheet 40 can be installed on the first tool holder 10 and / or the second tool holder 20 by gluing.

[0051] In another embodiment, if Figure 1 As shown, the first tool holder 10 and the second tool holder 20 are provided with tool placement grooves 22 on opposite side surfaces, respectively, and the tool placement grooves 22 extend from the same side surfaces of the first tool holder 10 and the second tool holder 20;

[0052] The shape of the knife body 30 matches the shape surrounded by the two knife grooves 22 .

[0053] By providing the knife groove 22 and embedding the knife body 30 in the knife groove 22, the overall structure of the slitting knife is more compact, the installation is tighter, and the structural stability is better.

[0054] In another embodiment, if Figure 1 As shown, a second mounting hole 21 is provided in the knife groove 22 , and a knife mounting hole 32 is correspondingly provided on the knife body 30 .

[0055] The tool body 30 is fixedly installed by the matching tool installation hole 32 and the second installation hole 21, and the connection stability between the tool body 30 and the first tool holder 10 or the second tool holder 20 is higher, and the fixing effect is better.

[0056] In another embodiment, if Figure 1 As shown, plastic sheet mounting grooves 13 are respectively provided on opposite sides of the first tool holder 10 and the second tool holder 20 .

[0057] The plastic sheet body 40 is installed and fixed by the plastic sheet installation groove 13, which further makes the overall structure of the slitting knife more compact and the connection stability better.

[0058] In another embodiment, if Figure 1 As shown, a third mounting hole 14 is formed on the plastic sheet mounting groove 13 , and a plastic sheet mounting hole 41 is formed on the plastic sheet body 40 .

[0059] The plastic sheet body 40 is installed and fixed through the plastic sheet installation hole 41 and the third installation hole 14, and the fixing effect is good.

[0060] In this embodiment, the detachable design of the plastic sheet body 40 is also realized by the design of the plastic sheet mounting hole 41 and the third mounting hole 14 .

[0061] The installation and fixing method of this embodiment is different from that of the above-mentioned embodiments. The plastic sheet body 40 is installed and fixed by screws passing through the plastic sheet installation holes 41 and the third installation holes 14.

[0062] In another embodiment, if Figure 1 , Figure 2 and Figure 4 As shown, a tool holder installation groove 12 is also provided on the first tool holder 10 and the second tool holder 20 .

[0063] The knife holder installation groove 12 is provided to facilitate installation and fixation of the slitting knife and the knife holder of the diaphragm slitting device.

[0064] In another embodiment, if Figure 3 As shown, the film-splitting plastic sheet 42 is arranged close to the blade portion 31 of the knife body 30 .

[0065] Since the diaphragm is immediately transported along the film-splitting plastic sheet 42 after being cut by the blade 31 , the film-splitting plastic sheet 42 is arranged close to the blade 31 to facilitate the smooth transportation of the diaphragm and avoid the situation where the diaphragm is stuck between the film-splitting plastic sheet 42 and the blade 31 .

[0066] In another embodiment, if Figure 1 As shown, the first tool holder 10 and the second tool holder 20 are respectively provided with first mounting holes 11 for mounting and fixing the first tool holder 10 and the second tool holder 20 .

[0067] By providing the first mounting hole 11, the first tool holder 10 and the second tool holder 20 can be tightly fixed to avoid relative displacement between the first tool holder 10 and the second tool holder 20 to affect the slitting quality.

[0068] In another embodiment, a lithium battery separator slitting device includes a tool rack and a defect detection device, wherein a plurality of slitting knives as in any of the above embodiments are mounted on the tool rack.

[0069] The slitting knife and lithium battery diaphragm slitting device of the utility model are designed with a split slitting knife, and a slitting plastic sheet 42 is installed on the slitting knife. The shape design of the slitting plastic sheet 42 at the blade 31 of the knife body 30 allows the two diaphragms cut by the blade 31 to naturally expand along the slitting plastic sheet 42, thereby expanding the gap between the diaphragms. This not only ensures that the normal defect identification will not be interfered with, but also facilitates the subsequent arrangement of rollers for independently collecting the diaphragms.

[0070] In another embodiment, a plurality of slitting knives are arranged side by side on the knife rack, and a plastic sheet 40 is respectively arranged on the two outermost slitting knives on both sides, and the two plastic sheets 40 are respectively arranged in opposite directions of the two slitting knives, and the remaining slitting knives are not provided with a plastic sheet 40;

[0071] In this embodiment, the function of the film-slitting plastic sheet 42 is limited to removing the waste films on both sides when the diaphragm is cut, and the position of the normally cut diaphragm remains unchanged.

[0072] In another embodiment, a plurality of slitting knives are arranged side by side on the knife rack, and the plurality of slitting knives are separated by a center line of the slitting knife arrangement. The plastic sheet body 40 of the slitting knife on the left side of the center line is installed on the second knife rack 20, and the plastic sheet body 40 of the slitting knife on the right side of the center line is installed on the first knife rack 10. If the number of slitting knives is even, there is no slitting knife with plastic sheet bodies 40 installed on both sides. If the number of slitting knives is odd, that is, the center line of the slitting knife arrangement is located on a slitting knife in the middle, plastic sheet bodies 40 are installed on both sides of the slitting knife.

[0073] In this embodiment, each slitting knife is provided with a plastic sheet 40, the purpose of which is that when slitting the diaphragm, each narrow diaphragm to be slit can be spread to both sides with the center line as the boundary, and the blade 31 will not push the diaphragm outward on the side where the plastic sheet 40 is not provided, but the diaphragm on this side will be pushed over by the film-splitting plastic sheet 42 of the adjacent slitting knife, so two opposite film-splitting plastic sheets 42 cannot be provided;

[0074] The cut membranes in this embodiment are spread out to both sides along the center line, that is, in addition to the waste membranes, the good membranes will also be displaced to achieve the technical effect of separation between the membranes, which is convenient for subsequent independent collection rollers.

[0075] It can be understood that in this embodiment, in order to achieve uniform expansion of the separated diaphragms, the bottom shapes of the film-splitting plastic sheets 42 of adjacent slitting knives are gradually decreasing. If the shapes of the film-splitting plastic sheets 42 are all the same, the displacements of adjacent diaphragms are the same, and the gaps between them will not change. Therefore, the bending amplitude of the bottom of the film-splitting plastic sheet 42 should be gradually changed to make the displacements of adjacent diaphragms different and realize the expansion of their gaps.

[0076] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A slitting knife, characterized in that: It comprises a first tool holder and a second tool holder, wherein a tool body is arranged between the first tool holder and the second tool holder, and a blade portion is arranged at one end of the tool body and the blade portion extends out of the first tool holder and the second tool holder; A plastic sheet body is arranged on the opposite sides of the first tool holder and / or the second tool holder, and a film-separating plastic sheet is arranged at one end of the plastic sheet body; The film-splitting plastic sheet extends to the blade and is flush with the cutting edge of the blade; The shape of the film-splitting plastic sheet at the position flush with the cutting edge of the blade is a shape that gradually bends from one end to the other end in a direction away from the blade.

2. The slitting knife according to claim 1, characterized in that: The first tool holder and the second tool holder are provided with tool placement grooves on opposite side surfaces, respectively, and the tool placement grooves extend from the same side surfaces of the first tool holder and the second tool holder; The shape of the knife body matches the shape surrounded by the two knife grooves.

3. The slitting knife according to claim 2, characterized in that: A second mounting hole is arranged in the knife groove, and a knife mounting hole is correspondingly arranged on the knife body.

4. The slitting knife according to claim 1, characterized in that: Plastic sheet installation grooves are respectively provided on opposite sides of the first tool holder and the second tool holder.

5. The slitting knife according to claim 4, characterized in that: The plastic sheet installation groove is provided with a third installation hole, and the plastic sheet body is provided with a plastic sheet installation hole.

6. The slitting knife according to claim 1, characterized in that: The first tool holder and the second tool holder are also provided with tool holder installation grooves.

7. The slitting knife according to claim 1, characterized in that: The film-splitting plastic sheet is arranged close to the blade of the knife body.

8. The slitting knife according to claim 1, characterized in that: The first tool holder and the second tool holder are respectively provided with first mounting holes for mounting and fixing the first tool holder and the second tool holder.

9. A lithium battery separator cutting device, characterized in that: It comprises a tool rack and a defect detection device, wherein a plurality of slitting knives as described in any one of claims 1 to 8 are mounted on the tool rack.

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