Foil slitting knife

Abstract

The utility model relates to a foil slitting knife which comprises a rotating rod and a blade connected with the rotating rod, the blade is a circular blade, a cooling water channel is arranged at the position of the axis of the rotating rod, and a through hole communicated with the cooling water channel is formed in the blade. The cooling water channel is formed in the axis of the rotating rod, and the through hole communicated with the cooling water channel is formed in the blade, so that cooling water flow can be introduced when the slitting knife works, the blade can be cooled all the time, the temperature of the blade is prevented from being too high, and then the slit foil can continuously run at a high speed without being affected, namely, the cutting efficiency is improved; and the cutting quality is improved, and the production requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of foil slitting, and more specifically, to a foil slitting knife. Background Art

[0002] For the electronic aluminum foil used in the existing formation foil and etching foil production lines, during the previous vacuum annealing and the processing process, some defects will appear on the edges of the foil. At this time, the part with defective edges of the foil needs to be cut off. In the prior art, generally, a slitting knife that rotates to work is used to slit the edges of the foil. During slitting, the cutting knife continuously rotates and frictions with the foil in contact, and the foil is also constantly moving. There will be a situation where the temperature of the cutting knife is too high. Moreover, the aluminum foil is also sensitive to temperature. After the temperature of the cutting knife rises, its slitting effect will drop significantly. During the cutting process, problems such as uneven cutting or burrs will occur, resulting in poor production. After the foil runs for a period of time during the slitting process, it is necessary to reduce the speed or even stop the machine to achieve the set cutting effect, which affects the production efficiency.

[0003] In the existing slitting equipment, a device for removing burrs of lithium battery soft-pack aluminum foil is disclosed, which includes a crimping frame, a cutting frame, and a waste recycling box arranged along the moving direction of the aluminum foil: Two groups of crimping wheels and two transition rollers are provided on the crimping frame, wherein the two groups of crimping wheels are respectively used to press the two edge sides of the aluminum foil, and the two transition rollers are used to press the middle part of the aluminum foil; A cooling mechanism and a cutting knife are provided on the cutting frame, wherein the cooling mechanism is used to reduce the temperature of the edge side of the aluminum foil, and the cutting knife is used to cut the burrs of the aluminum foil; The waste recycling box is provided with two, and the two waste recycling boxes are respectively used to recycle the burrs cut from both sides of the aluminum foil.

[0004] Specifically, the cooling mechanism of this device is a gas blowing device, which blows air flow towards the blade to take away the heat on the blade and cool the blade. To a certain extent, it can improve the problem of burrs appearing during the slitting of the blade. However, for a production line with a relatively high production efficiency, the foil moves relatively fast, and the cooling efficiency of blowing air is slightly insufficient, unable to fully meet the cooling requirements of the slitting knife and unable to meet the production requirements. Summary of the Utility Model

[0005] In order to overcome the defect of insufficient cooling efficiency of the slitting equipment for the slitting knife in the above-mentioned prior art, the utility model provides a foil slitting knife, which improves the slitting knife to enhance the cooling effect of the slitting knife and meet the production requirements.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is: A foil slitting knife, comprising: a rotating rod and a blade connected to the rotating rod, the blade is a circular blade, a cooling water channel is provided at the axis of the rotating rod, and a through hole communicating with the cooling water channel is provided on the blade.

[0007] The slitting knife of the present application rotates during operation and is connected to the device through a rotating rod. The blade is fixedly connected to the rotating rod. The device drives the blade to rotate through the rotating rod for cutting. At the same time, a cooling water channel is provided at the axial position of the rotating rod. Through holes are provided on the blade. Cooling water flows through the cooling water channel and exchanges heat with the blade when passing through the through holes, taking away the heat of the blade, cooling the blade, and thus keeping the blade in a low-temperature state, avoiding problems such as uneven cutting or burrs when slitting the foil, ensuring the production quality. While keeping the blade at a low temperature through the cooling water, it is also beneficial to improve the slitting efficiency of the foil and increase the output. Specifically, the cooling water channel penetrates the end of the rotating rod. Specifically, the rotating rod is connected to an external cooling water source through a rotary joint. One end of the rotary joint is fixed and the other end rotates during operation, which is a prior art. Further, the blade is made of a material with good thermal conductivity and suitable for making blades, such as copper, aluminum, or stainless steel.

[0008] Preferably, the rotating rod includes a plurality of connecting segments and a plurality of diameter-changing segments connected in sequence. The cooling water channel includes a first water channel provided in the connecting segment and a second water channel provided in the diameter-changing segment. The blade is provided in the diameter-changing segment. The first water channel and the second water channel are connected. The diameter of any cross-section of the second water channel is larger than the cross-section diameter of the first water channel.

[0009] The larger the contact area between the cooling water and the blade, the better the cooling effect of the blade. The diameter of any cross-section of the second water channel in the diameter-changing segment is larger than the cross-section diameter of the first water channel, and the blade is provided in the diameter-changing segment. Thus, the area of the part of the blade located in the second water channel is increased in sequence, and then the contact area between the cooling water and the blade is increased, improving the cooling effect.

[0010] Preferably, the two ends of the diameter-changing segment are symmetrically arranged relative to the blade.

[0011] The diameter-changing segment is symmetric with the blade as the symmetry plane. The diameter-changing segments at both ends of the blade are symmetric with each other. This not only makes the blade located in the middle position of the diameter-changing segment to ensure the heat exchange effect, but also enables the flow direction of the cooling water to be set arbitrarily. Whether it flows forward or backward, it can have the same cooling effect, making it more convenient to use.

[0012] Preferably, the cross-section diameter of the second water channel gradually decreases from the position close to the blade towards the connecting segment.

[0013] The second water channel is located in the diameter-changing segment, and the diameters of each cross-section do not need to be kept consistent. The cross-section of the second water channel close to the blade gradually decreases towards the connecting segment, so that the water flow can transition smoothly during the process of flowing from the connecting segment to the blade position and from the blade position to the connecting segment, improving the smoothness of the water flow.

[0014] Preferably, the second water channels on both sides of the blade are each conical in shape.

[0015] The second water channel being conical means that the second water channel has a conical or frustum-shaped cavity to ensure smooth water flow through.

[0016] Preferably, a plurality of through holes are provided on the blade, and all the through holes communicate with the cooling water channel.

[0017] Setting a plurality of through holes can, while ensuring the passage of cooling water, increase the contact area between the water flow and the blade as much as possible, ensure the heat conduction effect of the blade itself, and also enhance the cooling effect of the water flow. Further, the plurality of through holes are arranged in a circular array with the center of the blade as the array center, so that the through holes are evenly distributed to ensure the heat dissipation effect.

[0018] Preferably, at least two blades are provided on the rotating rod.

[0019] Two blades can simultaneously cut the defective parts on both sides of the foil. When more blades are provided, the main body of the foil can also be cut, for example, cutting the foil into two or more pieces, etc. At the same time, the specifications and dimensions of the blades provided on the rotating rod are all the same to ensure the use effect.

[0020] Preferably, the blade is further connected with a flow guiding member, and the flow guiding member is used to guide the cooling medium towards the edge of the blade.

[0021] The flow guiding member is fixedly connected to the blade and is completely located within the second water channel, and is used to guide the water flow to the high-temperature part near the edge of the blade. It can reduce the cavity volume of the second water channel, save cooling water, further enhance the water flow smoothness, and further improve the cooling effect. For blades with a larger diameter, the use effect is better when a flow guiding member is provided. At the same time, the flow guiding member can only be fixedly connected to the blade and is indirectly connected through the reduced-diameter section of the blade and the rotating rod. The flow guiding member is not directly connected to the reduced-diameter section to ensure the smoothness of the water flow. When it is necessary to increase the connection strength of the flow guiding member, part of the position of the flow guiding member can also be connected to the inner wall of the reduced-diameter section, and the connection parts need to be arranged in a circular array along the axis, so as to make the heat dissipation effect of each part of the blade as consistent as possible.

[0022] Preferably, the two ends of the flow guiding member are symmetrically arranged relative to the blade.

[0023] With the blade as the symmetry plane, the two ends of the flow guiding member are symmetrically arranged relative to the blade, which is conducive to water flow, and the forward flow and the reverse flow have the same cooling effect.

[0024] Preferably, conical flow guiding surfaces are provided at both ends of the flow guiding member.

[0025] The flow guiding member realizes water flow guiding through the conical flow guiding surfaces to ensure the water flow guiding effect.

[0026] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0027] By arranging a cooling water channel at the axis of the rotating rod and providing a through hole communicating with the cooling water channel in the blade, cooling water can be introduced when the slitting knife is working, so that the blade can be continuously cooled, avoiding the blade from getting too hot. As a result, the slit foil can rotate continuously at high speed without being affected, that is, the cutting efficiency is improved and the cutting quality is also improved, meeting the production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is an overall structural schematic diagram of a foil slitting knife of the present utility model;

[0029] Figure 2 is an internal structural schematic diagram of a foil slitting knife of the present utility model;

[0030] Figure 3 is a matching schematic diagram of the blade and the flow guiding member of a foil slitting knife of the present utility model.

[0031] In the figures: 1, rotating rod; 101, connecting section; 102, variable diameter section; 2, blade; 201, through hole; 3, cooling water channel; 301, first water channel; 302, second water channel; 4, flow guiding member; 401, flow guiding surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The drawings are only for illustrative purposes and cannot be construed as a limitation of this patent; for better illustrating this embodiment, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent.

[0033] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationships in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The technical solutions of the present utility model will be further specifically described below through specific embodiments and in conjunction with the drawings:

[0035] Example 1

[0036] As Figure 1-2 shown, a foil slitting knife includes a rotating rod 1 and a blade 2 connected to the rotating rod 1. The blade 2 is a circular blade 2. A cooling water channel 3 is provided at the axis of the rotating rod 1, and a through hole 201 communicating with the cooling water channel 3 is provided on the blade 2.

[0037] When the slitting knife of the present application is working, it rotates. It is connected to the equipment through the rotating rod 1, and the blade 2 is fixedly connected to the rotating rod 1. The equipment drives the blade 2 to rotate through the rotating rod 1 for cutting. At the same time, a cooling water channel 3 is provided at the axis position of the rotating rod 1, and a through hole 201 is provided on the blade 2. Cooling water flows through the cooling water channel 3 and exchanges heat with the blade 2 when passing through the through hole 201, taking away the heat of the blade 2 and cooling the blade 2, so that the blade 2 is kept in a low temperature state, avoiding problems such as uneven cutting or burrs when slitting the foil, ensuring the production quality. While keeping the blade 2 at a low temperature through the cooling water, it is also beneficial to improve the foil slitting efficiency and increase the output. Specifically, the cooling water channel 3 penetrates the end of the rotating rod 1. Specifically, the rotating rod 1 is connected to an external cooling water source through a rotary joint. One end of the rotary joint is fixed and the other end rotates during operation, which is a prior art. Further, the blade 2 is made of a material with good thermal conductivity and suitable for making the blade 2, such as copper, aluminum or stainless steel.

[0038] The beneficial effect of this embodiment: By providing a cooling water channel 3 at the axis of the rotating rod 1 and a through hole 201 communicating with the cooling water channel 3 on the blade 2, cooling water can be introduced when the slitting knife is working, and the blade 2 can be continuously cooled, avoiding the blade 2 from getting too hot. Thus, the slit foil can rotate continuously at a high speed without being affected, that is, both the cutting efficiency and the cutting quality are improved, meeting the production requirements.

[0039] Example 2

[0040] As Figure 1-3 shown, on the basis of Example 1, the difference from Example 1 is that:

[0041] The rotating rod 1 includes a plurality of connecting segments 101 and a plurality of diameter-changing segments 102 connected in sequence. The cooling water channel 3 includes a first water channel 301 disposed in the connecting segment 101 and a second water channel 302 disposed in the diameter-changing segment 102. The blade 2 is disposed in the diameter-changing segment 102. The first water channel 301 and the second water channel 302 are communicated. The diameter of any cross-section of the second water channel 302 is larger than the cross-sectional diameter of the first water channel 301. The two ends of the diameter-changing segment 102 are symmetrically disposed relative to the blade 2. The cross-sectional diameter of the second water channel 302 gradually decreases from the position close to the blade 2 towards the connecting segment 101. The second water channels 302 on both sides of the blade 2 are respectively conical. A plurality of through holes 201 are provided on the blade 2, and all the through holes 201 are communicated with the cooling water channel 3. At least two blades 2 are provided on the rotating rod 1.

[0042] The larger the contact area between the cooling water and the blade 2, the better the cooling effect of the blade 2. The diameter of any cross-section of the second water channel 302 in the diameter-changing segment 102 is larger than the cross-sectional diameter of the first water channel 301, and the blade 2 is disposed in the diameter-changing segment 102, thereby sequentially increasing the area of the part of the blade 2 located in the second water channel 302, thereby increasing the contact area between the cooling water and the blade 2 and enhancing the cooling effect. The diameter-changing segment 102 is symmetric with the blade 2 as the symmetry plane, and the diameter-changing segments 102 at both ends of the blade 2 are symmetric with each other, which not only makes the blade 2 located in the middle position of the diameter-changing segment 102 to ensure the heat exchange effect, but also enables the flow direction of the cooling water to be set arbitrarily, and the forward flow or the reverse flow can have the same cooling effect, making it more convenient to use. The second water channel 302 is located in the diameter-changing segment 102, and the diameters of the cross-sections do not need to be kept consistent. The cross-section of the second water channel 302 close to the blade 2 gradually decreases towards the connecting segment 101, so that the cooling water flow can be smoothly transitioned during the process of flowing from the connecting segment 101 to the position of the blade 2 and from the position of the blade 2 to the connecting segment 101, improving the smoothness of the water flow. The second water channel 302 being conical means that the second water channel 302 has a conical or frustum-shaped cavity to ensure the smooth flow of the water flow. Providing a plurality of through holes 201 can increase the contact area between the water flow and the blade 2 as much as possible while ensuring the passing of the cooling water flow, ensuring the heat conduction effect of the blade 2 itself and also enhancing the cooling effect of the water flow. Further, the plurality of through holes 201 are arranged in a circular array with the center of the circle of the blade 2 as the array center, so that the through holes 201 are evenly distributed to ensure the heat dissipation effect. The two blades 2 can simultaneously cut the defective parts on both sides of the foil. When more blades 2 are provided, the main body of the foil can also be cut, for example, the foil can be cut into two or more pieces, etc. At the same time, the specifications and dimensions of the blades 2 provided on the rotating rod 1 are all the same to ensure the use effect.

[0043] As Figure 1-2 shown, in this embodiment, two blades 2 are provided on the rotating rod 1.

[0044] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0045] Embodiment 3

[0046] As Figure 1-3 shown, on the basis of Embodiment 1 or Embodiment 2, Embodiment 1 or Embodiment 2 is further limited. The difference lies in that:

[0047] The blade 2 is further connected with a flow guide member 4, and the flow guide member 4 is used to guide the cooling medium towards the edge of the blade 2. The two ends of the flow guide member 4 are symmetrically arranged relative to the blade 2. Conical flow guide surfaces 401 are respectively provided at the two ends of the flow guide member 4.

[0048] The flow guide member 4 is fixedly connected with the blade 2 and is completely located in the second water channel 302, and is used to guide the water flow to the high-temperature part near the edge of the blade 2, which can reduce the cavity volume of the second water channel 302, save cooling water, further improve the water flow smoothness, and further improve the cooling effect. For a blade 2 with a larger diameter, the setting of the flow guide member 4 has a better use effect. Taking the blade 2 as the symmetry plane, the two ends of the flow guide member 4 are symmetrically arranged relative to the blade 2, which is beneficial to the water flow, and the forward flow and the reverse flow have the same cooling effect. The flow guide member 4 realizes the flow guide through the conical flow guide surfaces 401 to ensure the flow guide effect.

[0049] Further, as Figure 2 shown, in this embodiment, the flow guide member 4 is only fixedly connected with the blade 2 and is indirectly connected with the reduced-diameter section 102 of the rotating rod 1 through the blade 2. The flow guide member 4 is not directly connected with the reduced-diameter section 102 to ensure the smoothness of the water flow. When it is necessary to increase the connection strength of the flow guide member 4, a part of the flow guide member 4 can be connected with the inner wall of the reduced-diameter section 102, and the connection parts need to be arranged in an annular array along the axis, so as to make the heat dissipation effect of each part of the blade 2 as consistent as possible.

[0050] The remaining working principles and working processes of this embodiment are the same as those of Embodiment 1 or Embodiment 2.

[0051] Obviously, the above embodiments of the present invention are only examples clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A foil slitting knife, characterized in that: include: A rotating rod (1) and a blade (2) connected to the rotating rod (1), wherein the blade (2) is a circular blade (2), a cooling water channel (3) is provided at the axis of the rotating rod (1), and a through hole (201) connected to the cooling water channel (3) is provided on the blade (2).

2. A foil slitting knife according to claim 1, characterized in that: The rotating rod (1) comprises a plurality of connecting sections (101) and a plurality of reducing sections (102) connected in sequence, the cooling water channel (3) comprises a first water channel (301) arranged in the connecting section (101) and a second water channel (302) arranged in the reducing section (102), the blade (2) is arranged in the reducing section (102), the first water channel (301) and the second water channel (302) are connected, and any cross-sectional diameter of the second water channel (302) is greater than the cross-sectional diameter of the first water channel (301).

3. A foil slitting knife according to claim 2, characterized in that: The two ends of the diameter-changing section (102) are symmetrically arranged relative to the blade (2).

4. A foil slitting knife according to claim 3, characterized in that: The cross-sectional diameter of the second water channel (302) close to the blade (2) is larger than the cross-sectional diameter close to the connecting section (101).

5. A foil slitting knife according to claim 4, characterized in that: The second water channels (302) on both sides of the blade (2) are both conical in shape.

6. A foil slitting knife according to claim 2, characterized in that: The blade (2) is provided with a plurality of through holes (201), and all of the through holes (201) are in communication with the cooling water channel (3).

7. The foil slitting knife according to claim 1, characterized in that: At least two blades (2) are arranged on the rotating rod (1).

8. A foil slitting knife according to any one of claims 1 to 7, characterized in that: The blade (2) is also connected to a flow guide (4), and the flow guide (4) is used to guide the cooling medium toward the edge of the blade (2).

9. A foil slitting knife according to claim 8, characterized in that: The two ends of the flow guide (4) are symmetrically arranged relative to the blade (2).

10. The foil slitting knife according to claim 9, characterized in that: Conical flow guiding surfaces (401) are respectively provided at both ends of the flow guiding member (4).

Images