Copper foil slitting device

Abstract

The application provides a copper foil slitting device. The copper foil slitting device comprises a roller, a cutter mechanism, an air duct assembly, a protective cover and a negative pressure device. The cutter mechanism comprises a mounting seat and a cutter mounted on the mounting seat. The protective cover is arranged outside the cutter mechanism, and an air cavity is formed between the protective cover and the cutter mechanism. A first air inlet is formed on the side of the protective cover close to the roller. The side of the protective cover is provided with a first air outlet, and the first air outlet is communicated with the negative pressure device. The roller comprises a roller shaft and a roller sleeve. The roller shaft comprises a first shaft section and a second shaft section. The roller sleeve is sleeved on the first shaft section. The air duct assembly comprises a mounting ring mounted on the second shaft section. A second air inlet is formed on the outer circumferential surface of the mounting ring, and the second air inlet is opposite to the cutter along the radial direction of the roller. A first air duct is formed on the second shaft section along the axial direction. The two ends of the first air duct are respectively communicated with the second air inlet and the negative pressure device. The application provides a copper foil slitting device, and the copper scrap cleaning effect is good.

Description

Technical Field

[0001] This invention relates to the field of copper foil manufacturing, and more particularly to a copper foil slitting apparatus. Background Technology

[0002] Copper foil has excellent electromagnetic shielding properties and is widely used in electronics, communications, medical and other fields. In the production stage of copper foil, it is generally necessary to cut the copper foil using a slitting machine. The slitting process generates copper shavings, which can easily adhere to the surface of the copper foil and may cause short circuits in the circuits etched on the copper foil later.

[0003] In existing technologies, a negative pressure device is typically installed near the copper foil being slit by a slitting machine. The suction generated by the negative pressure device can draw in copper shavings, thereby preventing short circuits in the etched circuits on the copper foil.

[0004] However, the above-mentioned method of cleaning copper shavings is not very effective. Summary of the Invention

[0005] To address at least one of the problems mentioned in the background art, the present invention provides a copper foil slitting device with good copper shavings cleaning effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides a copper foil slitting device, including a roller, a cutting mechanism, an air duct assembly, a protective cover, and a negative pressure device. The cutting mechanism is disposed on the outside of the roller and includes a mounting base and a cutting blade. The cutting blade is mounted on the mounting base and is used to cut the copper foil on the roller.

[0008] A protective cover is installed outside the cutting mechanism, and an air cavity is formed between the protective cover and the cutting mechanism. A first air inlet is provided on the side of the protective cover near the roller. The cutting blade extends out from the first air inlet. A first air outlet is provided on one side of the protective cover. The first air outlet is connected to the negative pressure equipment so that at least some of the copper foil chips enter the negative pressure equipment after passing through the first air inlet, the air cavity and the first air outlet in sequence under the suction of the negative pressure equipment.

[0009] The roller includes a roller shaft and a roller sleeve. The roller shaft includes a first shaft section and a second shaft section. The roller sleeve is fitted onto the first shaft section. The air duct assembly includes a mounting ring, which is mounted on the second shaft section. A portion of the copper foil is wound around the roller sleeve, and another portion of the copper foil is wound around the mounting ring. A second air inlet is provided on the outer circumferential surface of the mounting ring. The second air inlet is opposite to the cutter along the radial direction of the roller. A first air duct is provided along the axial direction on the second shaft section. The two ends of the first air duct are respectively connected to the second air inlet and the negative pressure device, so that at least some of the copper foil chips enter the negative pressure device after passing through the second air inlet and the first air duct in sequence under the suction of the negative pressure device.

[0010] As an optional implementation, the mounting ring includes a first mounting ring and a second mounting ring. The first mounting ring is located between the roller sleeve and the second mounting ring. A portion of the copper foil is wound around the roller sleeve, and another portion of the copper foil is wound around the first mounting ring and the second mounting ring. A second air inlet is formed between the adjacent end faces of the first mounting ring and the second mounting ring.

[0011] As an optional implementation, the outer peripheral surface of the mounting ring is flush with the outer peripheral surface of the roller sleeve.

[0012] As an optional implementation, a second air duct is provided on the first mounting ring. The second air duct extends to the end face of the first mounting ring adjacent to the roller sleeve. One end of the second air duct is connected to the second air inlet, and the other end of the second air duct is connected to the first air duct.

[0013] As an optional implementation, a second air outlet is provided at one end of the second shaft segment away from the first shaft segment. The two ends of the first air duct are respectively connected to the second air duct and the second air outlet. The negative pressure device is connected to the second air outlet so that at least some of the copper foil chips enter the negative pressure device after passing through the second air inlet, the second air duct, the first air duct and the second air outlet in sequence under the suction of the negative pressure device.

[0014] As an alternative implementation, the end face of the first mounting ring facing away from the first shaft segment is opposite to the cutter along the radial direction of the roller, so as to form a shearing force for cutting copper foil between the end face of the first mounting ring and the cutter.

[0015] As an optional implementation, the duct assembly also includes a sealing ring mounted on the second shaft segment and located between the first mounting ring and the second mounting ring.

[0016] As an optional implementation, a locking nut is also included, wherein the end of the second shaft segment opposite to the first shaft segment has an external thread, the locking nut is threaded onto the external thread, and the locking thread is configured to abut against the end face of the second mounting ring.

[0017] As an optional implementation, the gap between the protective cover and the first mounting ring is 2mm-6mm, and the gap between the protective cover and the second mounting ring is 1mm-3mm.

[0018] As an optional implementation, an air rotary joint is also included, which is installed at the second air outlet and whose air outlet is connected to the negative pressure device.

[0019] The copper foil slitting device provided by this invention includes a roller, a cutting mechanism, an air duct assembly, a protective cover, and a negative pressure device. The cutting mechanism is disposed outside the roller and includes a mounting base and a cutting blade. The cutting blade is mounted on the mounting base and is used to cut the copper foil on the roller. The protective cover is disposed outside the cutting mechanism, and an air cavity is formed between the protective cover and the cutting mechanism. A first air inlet is provided on the side of the protective cover near the roller, and the cutting blade extends from the first air inlet. A first air outlet is provided on one side of the protective cover, and the first air outlet is connected to the negative pressure device, so that at least some of the copper foil chips pass sequentially through the first air inlet, the air cavity, and the first air outlet under the suction of the negative pressure device. The copper foil then enters the negative pressure equipment. The roller includes a roller shaft and a roller sleeve. The roller shaft includes a first shaft section and a second shaft section. The roller sleeve is fitted onto the first shaft section. The air duct assembly includes a mounting ring, which is mounted on the second shaft section. A portion of the copper foil is wound around the roller sleeve, and another portion of the copper foil is wound around the mounting ring. A second air inlet is provided on the outer circumferential surface of the mounting ring. The second air inlet is opposite to the cutter along the radial direction of the roller. A first air duct is provided along the axial direction on the second shaft section. The two ends of the first air duct are respectively connected to the second air inlet and the negative pressure equipment, so that at least some of the copper foil chips enter the negative pressure equipment after passing through the second air inlet and the first air duct in sequence under the suction of the negative pressure equipment.

[0020] The copper foil slitting device provided by this invention generates copper shavings during copper foil slitting. Part of the copper shavings can be sucked into the negative pressure device after passing through the first air inlet, the air cavity, and the first air outlet in sequence. The other part of the copper shavings can be sucked into the negative pressure device after passing through the second air inlet and the first air duct in sequence. The copper shavings are cleaned from both the inner and outer sides of the copper foil through the upper and lower channels for absorbing copper shavings, which can effectively prevent copper shavings residue in dead corners and improve the cleaning effect of copper shavings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a copper foil slitting device provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100-Copper foil slitting device;

[0026] 110-Roller;

[0027] 111 - First axle segment;

[0028] 112 - Second axle segment;

[0029] 1121 - First air duct;

[0030] 113 - Roller sleeve;

[0031] 120 - Cutting mechanism;

[0032] 121 - Mounting base;

[0033] 122 - Cutting knife;

[0034] 130 - Air duct assembly;

[0035] 131 - Mounting ring;

[0036] 1311 - Second air inlet;

[0037] 1312 - First mounting ring;

[0038] 1313 - Second mounting ring;

[0039] 1314 - Second air duct;

[0040] 132 - Sealing ring;

[0041] 140 - Protective shield;

[0042] 141-Wind cavity;

[0043] 142 - First air inlet;

[0044] 143 - First air outlet;

[0045] 150 - Locking nut;

[0046] 160-Air rotary joint;

[0047] 200-Copper foil. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or to be constructed and operated in a specific orientation.

[0050] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0051] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0052] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0053] In the copper foil production stage, copper foil is typically slit using a slitting machine. This slitting process generates copper shavings, which easily adhere to the copper foil surface and may cause short circuits in the subsequent etched circuitry. Current technology generally uses a negative pressure device near the slitting machine to suction out the copper shavings, thus preventing short circuits in the etched circuitry. However, this method of cleaning copper shavings is difficult to reach certain hard-to-reach areas, leaving considerable residue and resulting in poor cleaning effectiveness.

[0054] In view of this, the present invention provides a copper foil slitting device, including a roller, a cutting mechanism, an air duct assembly, a protective cover, and a negative pressure device. The cutting mechanism is disposed outside the roller and includes a mounting base and a cutting blade. The cutting blade is mounted on the mounting base and is used to cut the copper foil on the roller. The protective cover is disposed outside the cutting mechanism, and an air cavity is formed between the protective cover and the cutting mechanism. A first air inlet is provided on the side of the protective cover near the roller, and the cutting blade extends out from the first air inlet. A first air outlet is provided on one side of the protective cover. The air outlet is connected to the negative pressure equipment; the roller includes a roller shaft and a roller sleeve, the roller shaft includes a first shaft section and a second shaft section, the roller sleeve is sleeved on the first shaft section, the air duct assembly includes a mounting ring, the mounting ring is mounted on the second shaft section, a portion of the copper foil is wound around the roller sleeve, and another portion of the copper foil is wound around the mounting ring; a second air inlet is opened on the outer circumferential surface of the mounting ring, the second air inlet is opposite to the cutter along the radial direction of the roller, and a first air duct is opened along the axial direction on the second shaft section, the two ends of the first air duct are respectively connected to the second air inlet and the negative pressure equipment. When the copper foil slitting device provided by this invention slits copper foil, a portion of the copper shavings generated can be sequentially drawn into the negative pressure equipment after passing through the first air inlet, the air chamber, and the first air outlet, while another portion of the copper shavings can be sequentially drawn into the negative pressure equipment after passing through the second air inlet and the first air duct. By using two channels to absorb copper shavings from both the inner and outer sides of the copper foil, the copper shavings can be effectively cleaned, preventing copper shavings residue in dead corners and improving the cleaning effect.

[0055] Figure 1 This is a schematic diagram of the overall structure of a copper foil slitting device provided in an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0056] You can refer to this. Figure 1 and Figure 2This invention provides a copper foil slitting device 100, including a roller 110, a cutting mechanism 120, an air duct assembly 130, a protective cover 140, and a negative pressure device. The cutting mechanism 120 is disposed outside the roller 110 and includes a mounting base 121 and a cutter 122. The cutter 122 is mounted on the mounting base 121 and is used to cut the copper foil 200 on the roller 110. The protective cover 140 covers the cutter. Outside the mechanism 120, a wind cavity 141 is formed between the protective cover 140 and the cutting mechanism 120. A first air inlet 142 is provided on the side of the protective cover 140 near the roller 110. The cutting blade 122 extends out from the first air inlet 142. A first air outlet 143 is provided on one side of the protective cover 140. The first air outlet 143 is connected to a negative pressure device so that at least some of the copper foil 200 chips pass through the first air inlet 142 and the wind cavity 141 in sequence under the suction of the negative pressure device. 1. After the first air outlet 143, the air enters the negative pressure equipment; the roller 110 includes a roller shaft and a roller sleeve 113. The roller shaft includes a first shaft section 111 and a second shaft section 112. The roller sleeve 113 is sleeved on the first shaft section 111. The air duct assembly 130 includes a mounting ring 131, which is mounted on the second shaft section 112. A portion of the copper foil 200 is wound around the roller sleeve 113, and another portion of the copper foil 200 is wound around the mounting ring 131; the mounting ring 1 A second air inlet 1311 is provided on the outer peripheral surface of roller 110. The second air inlet 1311 is opposite to the cutter 122 along the radial direction of roller 110. A first air duct 1121 is provided on the second shaft section 112 along the axial direction. The two ends of the first air duct 1121 are respectively connected to the second air inlet 1311 and the negative pressure device, so that at least some of the copper foil 200 chips enter the negative pressure device after passing through the second air inlet 1311 and the first air duct 1121 in sequence under the suction of the negative pressure device.

[0057] The protective cover 140 can be used to form an air cavity 141 for absorbing copper shavings. On the other hand, the protective cover 140 can block the position where the cutter 122 cuts the copper foil 200, preventing copper shavings from splashing to positions where the suction of the negative pressure equipment cannot reach.

[0058] When the copper foil slitting device 100 provided in this embodiment of the invention slits copper foil 200, a portion of the copper shavings generated can be sucked into the negative pressure device after passing through the first air inlet 142, the air chamber 141 and the first air outlet 143 in sequence. Another portion of the copper shavings can be sucked into the negative pressure device after passing through the second air inlet 1311 and the first air duct 1121 in sequence. The copper shavings are cleaned from both the inner and outer sides of the copper foil 200 through the two channels for absorbing copper shavings, which can effectively prevent copper shavings residue in dead corners and improve the cleaning effect of copper shavings.

[0059] Specifically, such as Figure 1 and Figure 2As shown, the first suction port can suck up copper shavings from the outside of the copper foil 200, and the second suction port can suck up copper shavings from the inside of the copper foil 200. The first and second suction ports are positioned opposite each other. In this way, copper shavings that are attached to the surface of the copper foil 200 or the roller 110, or copper shavings that have entered the gap between the copper foil 200 and the roller 110, can be acted upon by the suction force generated by the negative pressure device. Moreover, through the suction force in two directions, copper shavings can be sucked up from different directions, effectively preventing the adhesion force of copper shavings from being the same as the suction force, which would make it difficult to clean the copper shavings.

[0060] In the above embodiment, the mounting ring 131 may include a first mounting ring 1312 and a second mounting ring 1313. The first mounting ring 1312 is located between the roller sleeve 113 and the second mounting ring 1313. A portion of the copper foil 200 is wound around the roller sleeve 113, and another portion of the copper foil 200 is wound around the first mounting ring 1312 and the second mounting ring 1313. A second air inlet 1311 is formed between the adjacent end faces of the first mounting ring 1312 and the second mounting ring 1313. It can be understood that the first mounting ring 1312 and the second mounting ring 1313 can be fixedly mounted on the second shaft segment 112. A portion of the copper shavings generated by slitting can be sucked in through the second air inlet 1311 and then enter the first air duct 1121. The shape of the second air inlet can be generally annular, and the opening size of the second air inlet gradually narrows from the outer peripheral surface of the mounting ring 131 to the axis of the mounting ring 131, thus facilitating the entry of copper shavings into the second air inlet.

[0061] In the above embodiments, the outer peripheral surface of the mounting ring 131 can be flush with the outer peripheral surface of the roller sleeve 113. This allows the copper foil 200 to be evenly wound around the roller sleeve 113 and the mounting ring 131, thereby reducing the gap between the copper foil 200 and the mounting ring 131 and preventing copper shavings from entering the gap. Specifically, the diameter of the roller sleeve 113 can be equal to the diameters of the first mounting ring 1312 and the second mounting ring 1313.

[0062] In the above embodiment, a second air duct 1314 can be formed on the first mounting ring 1312. The second air duct 1314 extends to the end face of the first mounting ring 1312 adjacent to the roller sleeve 113. One end of the second air duct 1314 is connected to the second air inlet 1311, and the other end of the second air duct 1314 is connected to the first air duct 1121. In this way, a portion of copper shavings can be sequentially drawn into the negative pressure device after passing through the second air inlet 1311, the second air duct 1314, and the first air duct 1121. The extension of the second air duct 1314 to the end face of the first mounting ring 1312 adjacent to the roller sleeve 113 can absorb copper shavings in the gap between the first mounting ring 1312 and the roller sleeve 113, further improving the cleaning effect of copper shavings.

[0063] In the above embodiment, a second air outlet can be opened at the end of the second shaft segment 112 that is away from the first shaft segment 111. The two ends of the first air duct 1121 are respectively connected to the second air duct 1314 and the second air outlet. The negative pressure device is connected to the second air outlet, so that a portion of copper shavings can enter the negative pressure device after passing through the second air inlet 1311, the second air duct 1314, the first air duct 1121 and the second air outlet in sequence under the suction of the negative pressure device. By setting the second air outlet, it is convenient to connect with the negative pressure device.

[0064] In the above embodiment, the end face of the first mounting ring 1312 facing away from the first shaft segment 111 can be positioned opposite the cutter 122 radially to the roller 110, thereby forming a shearing force for cutting the copper foil 200 between the end face of the first mounting ring 1312 and the cutter 122. Figure 1 and Figure 2 As shown, it can be understood that when the cutter 122 cuts the copper foil 200 downwards, the right end face of the first mounting ring 1312 (the end face adjacent to the second mounting ring 1313) can cooperate with the cutter 122 to cut the copper foil 200, thereby reducing the copper shavings generated during the cutting of the copper foil 200. Specifically, refer to... Figure 2 The parts of the cutter 122 and the first mounting ring 1312 that are opposite each other can be designed as bevels, thereby reducing the contact area between the right end face of the cutter 122 and the first mounting ring 1312 and the copper foil 200, and reducing the difficulty of cutting the copper foil 200.

[0065] In the above embodiments, the air duct assembly 130 may further include a sealing ring 132, which is mounted on the second shaft segment 112 and located between the first mounting ring 1312 and the second mounting ring 1313. The sealing ring 132 seals the gap between the first mounting ring 1312 and the second mounting ring 1313, preventing copper shavings from entering the gap and reducing cleaning difficulty.

[0066] In the above embodiments, a locking nut 150 may also be included. The end of the second shaft segment 112 facing away from the first shaft segment 111 has an external thread. The locking nut 150 is threadedly connected to the external thread, and the locking thread is configured to abut against the end face of the second mounting ring 1313. The locking nut 150 can lock the end of the second mounting ring 1313, preventing the first mounting ring 1312 and the second mounting ring 1313 from loosening. This prevents the gap between the first mounting ring 1312, the sealing ring 132, and the second mounting ring 1313 from widening, preventing copper shavings from entering these gaps and thus reducing the difficulty of copper shavings cleaning.

[0067] In the above embodiments, the gap between the protective cover and the first mounting ring 1312 can be 2mm-6mm, and the gap between the protective cover 140 and the second mounting ring 1313 can be 1mm-3mm. This ensures that copper shavings on both sides of the protective cover 140 are drawn into the air cavity 141 of the protective cover 140, while also preventing an excessively large gap between the protective cover 140 and the mounting ring 131, which would result in insufficient suction and a reduced shielding effect of the protective cover 140 on copper shavings.

[0068] In the above embodiments, an air rotary joint 160 may also be included. The air rotary joint 160 is installed at the second air outlet, and the air outlet of the air rotary joint 160 is connected to the negative pressure device. Connecting the second air outlet and the negative pressure device through the air rotary joint 160 can improve the stability and sealing of the connection, thereby increasing the suction force for copper shavings.

[0069] The copper foil slitting device 100 provided in this embodiment of the invention includes a roller 110, a cutting mechanism 120, an air duct assembly 130, a protective cover 140, and a negative pressure device. The cutting mechanism 120 is disposed outside the roller 110 and includes a mounting base 121 and a cutting blade 122. The cutting blade 122 is mounted on the mounting base 121 and is used to cut the copper foil 200 on the roller 110. The protective cover 140 covers the cutting mechanism 120. A wind cavity 141 is formed between the protective cover 140 and the cutting mechanism 120. A first air inlet 142 is provided on the side of the protective cover 140 near the roller 110. The cutting blade 122 extends out from the first air inlet 142. A first air outlet 143 is provided on one side of the protective cover 140. The first air outlet 143 is connected to a negative pressure device so that at least some of the copper foil 200 chips pass sequentially through the first air inlet 142, the wind cavity 141, and the cutting mechanism 120 under the suction of the negative pressure device. After exiting through outlet 143, the air enters the negative pressure equipment; roller 110 includes a roller shaft and roller sleeve 113, the roller shaft includes a first shaft section 111 and a second shaft section 112, roller sleeve 113 is fitted onto the first shaft section 111, air duct assembly 130 includes mounting ring 131, mounting ring 131 is mounted onto the second shaft section 112, a portion of copper foil 200 is wound around roller sleeve 113, and another portion of copper foil 200 is wound around mounting ring 131; mounting ring 131 A second air inlet 1311 is provided on the outer peripheral surface of the roller 110. The second air inlet 1311 is opposite to the cutter 122 along the radial direction of the roller 110. A first air duct 1121 is provided on the second shaft section 112 along the axial direction. The two ends of the first air duct 1121 are respectively connected to the second air inlet 1311 and the negative pressure device, so that at least some of the copper foil 200 chips enter the negative pressure device after passing through the second air inlet 1311 and the first air duct 1121 in sequence under the suction of the negative pressure device.

[0070] When the copper foil slitting device 100 provided in this embodiment of the invention slits copper foil 200, a portion of the copper shavings generated can be sucked into the negative pressure device after passing through the first air inlet 142, the air chamber 141 and the first air outlet 143 in sequence. Another portion of the copper shavings can be sucked into the negative pressure device after passing through the second air inlet 1311 and the first air duct 1121 in sequence. The copper shavings are cleaned from both the inner and outer sides of the copper foil 200 through the two channels for absorbing copper shavings, which can effectively prevent copper shavings residue in dead corners and improve the cleaning effect of copper shavings.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A copper foil slitting device, characterized in that, It includes a roller, a cutting mechanism, an air duct assembly, a protective cover, and a negative pressure device. The cutting mechanism is located on the outside of the roller and includes a mounting base and a cutter. The cutter is mounted on the mounting base and is used to cut copper foil on the roller. The protective cover is installed outside the cutting mechanism, and an air cavity is formed between the protective cover and the cutting mechanism. A first air inlet is provided on the side of the protective cover near the roller. The cutting blade extends out from the first air inlet. A first air outlet is provided on one side of the protective cover. The first air outlet is connected to the negative pressure device so that at least some of the copper foil chips enter the negative pressure device after passing through the first air inlet, the air cavity and the first air outlet in sequence under the suction of the negative pressure device. The roller includes a roller shaft and a roller sleeve. The roller shaft includes a first shaft section and a second shaft section. The roller sleeve is fitted onto the first shaft section. The air duct assembly includes a mounting ring, which is mounted on the second shaft section. A portion of the copper foil is wound around the roller sleeve, and another portion of the copper foil is wound around the mounting ring. A second air inlet is formed on the outer circumferential surface of the mounting ring. The second air inlet is radially opposite to the cutter of the roller. The shape of the second air inlet is generally annular. The opening size of the second air inlet gradually narrows from the outer circumferential surface of the mounting ring to the axis of the mounting ring. A first air duct is formed axially on the second shaft section. The two ends of the first air duct are respectively connected to the second air inlet and the negative pressure device, so that at least part of the copper foil chips enter the negative pressure device after passing through the second air inlet and the first air duct in sequence under the suction of the negative pressure device. The mounting ring includes a first mounting ring and a second mounting ring. The first mounting ring is located between the roller sleeve and the second mounting ring. A portion of the copper foil is wound around the roller sleeve, and another portion of the copper foil is wound around the first mounting ring and the second mounting ring. A second air inlet is formed between the adjacent end faces of the first mounting ring and the second mounting ring. A second air duct is provided on the first mounting ring. The second air duct extends to the end face of the first mounting ring adjacent to the roller sleeve. One end of the second air duct is connected to the second air inlet, and the other end of the second air duct is connected to the first air duct. The portion of the cutter opposite to the first mounting ring is an inclined surface.

2. The copper foil slitting device according to claim 1, characterized in that, The outer circumferential surface of the mounting ring is flush with the outer circumferential surface of the roller sleeve.

3. The copper foil slitting device according to claim 2, characterized in that, The second shaft segment has a second air outlet at one end opposite to the first shaft segment. The two ends of the first air duct are respectively connected to the second air duct and the second air outlet. The negative pressure device is connected to the second air outlet so that at least some of the copper foil chips enter the negative pressure device after passing through the second air inlet, the second air duct, the first air duct and the second air outlet in sequence under the suction of the negative pressure device.

4. The copper foil slitting device according to claim 3, characterized in that, The end face of the first mounting ring facing away from the first shaft segment is opposite to the cutter along the radial direction of the roller, so as to form a shearing force for cutting the copper foil between the end face of the first mounting ring and the cutter.

5. The copper foil slitting device according to claim 4, characterized in that, The air duct assembly also includes a sealing ring, which is installed on the second shaft segment and is located between the first mounting ring and the second mounting ring.

6. The copper foil slitting device according to claim 5, characterized in that, It also includes a locking nut, the end of the second shaft segment opposite to the first shaft segment having an external thread, the locking nut being threaded onto the external thread, and the locking nut being configured to abut against the end face of the second mounting ring.

7. The copper foil slitting device according to claim 6, characterized in that, The gap between the protective cover and the first mounting ring is 2mm-6mm, and the gap between the protective cover and the second mounting ring is 1mm-3mm.

8. The copper foil slitting device according to claim 7, characterized in that, It also includes an air rotary joint, which is installed at the second air outlet and whose air outlet is connected to the negative pressure device.

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