Copper powder removing device for electrolytic copper foil slitting

Abstract

A copper powder removing device for electrolytic copper foil slitting comprises a bottom plate, a cooling part is arranged on the bottom plate, a circulating part is arranged on the cooling part, a heating part is arranged on the cooling part, a slitting machine is arranged on the bottom plate and located beside the cooling part, the cooling part comprises a cooling pond, cooling liquid is contained in the cooling pond, and the cooling pond is provided with a water inlet and a water outlet. A brush carrier is arranged in the cooling pool, a liquid outlet is formed in the cooling pool, bristles are arranged on the brush carrier, and a valve is arranged on the liquid outlet and used for controlling the cooling pool to discharge liquid; an adhesive roller is replaced by the annular circulating belt, and the circulating belt is driven by the extrusion wheel to continuously run and work continuously, so that the downtime caused by the replacement of the adhesive roller is avoided, and the utilization rate of the splitting machine is improved; the surface of the rubber belt body is periodically softened through the hot air machine head, the adsorption capacity is recovered, viscosity reduction caused by copper powder accumulation is avoided, the service life of the circulating belt is longer than that of a traditional sticking roller, and the replacement frequency is reduced.

Description

Technical Field

[0001] The invention relates to the field of electrolytic copper foil slitting, and in particular to a copper powder removing device used for electrolytic copper foil slitting. Background Art

[0002] Electrolytic copper foil is the core conductive substrate for copper clad laminate (CCL), printed circuit board (PCB) and lithium-ion battery manufacturing. Its performance directly affects the conductivity, mechanical strength and battery safety of electronic devices. In the production process of electrolytic copper foil, the slitting process is the key link that determines the final form of the product. The large roll of copper foil is cut into standardized finished products with specific width, weight and number of meters by a slitting machine. During the slitting process of the electrolytic copper foil, copper powder that is difficult to identify with the naked eye is easily generated at the incision. These copper powders are easy to fall on the surface of the electrolytic copper foil during the winding process. Uncleaned copper powder can easily cause quality risks such as copper foil imprinting, unclean PCB etching, and lithium battery puncture, seriously affecting the performance of the electrolytic copper foil. At present, domestic copper foil factories will stick the electrolytic copper foil with a sticking roller before winding it after slitting to remove the copper powder on the surface of the electrolytic copper foil, and remove the copper powder on the edge by manual wiping and sticking.

[0003] In the prior art, since copper powder basically appears from the incision at the edge of the copper foil, and the sticking roller is basically fixed and rotated after being installed, a large amount of copper powder will need to be pasted and removed near the part of the sticking roller that contacts the copper foil incision. When slitting large amounts of electrolytic copper foil, as the number of meters of electrolytic copper foil increases, more copper powder will be pasted on the surface of the sticking roller, and the adhesion to subsequent copper powder will decrease, affecting the effect of copper powder removal; and if the copper powder pasted on the surface of the sticking roller is not cleaned in time, not only will the newly appeared copper powder be unable to be pasted, but the copper powder previously pasted on the surface of the sticking roller may also fall off, resulting in more copper powder accumulation on the surface of part of the electrolytic copper foil. Therefore, the sticking roller needs to be replaced in time to obtain a better copper powder removal effect, but frequent replacement of the sticking roller is bound to affect the utilization rate of the slitting machine. Moreover, the sticking roller far away from the copper foil incision has almost no copper powder to be pasted and processed, so its adhesion is still good. Replacing the sticking roller will reduce the effective utilization rate of the sticking roller surface here. In order to solve the above problems, a copper powder removal device for electrolytic copper foil slitting is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that frequent replacement of sticking rollers will affect the utilization rate of a slitting machine and that replacement of the sticking rollers will reduce the effective utilization rate of the sticking roller surface.

[0005] The present invention adopts the following technical solutions:

[0006] A copper powder removal device for slitting electrolytic copper foil, comprising a base plate, a cooling portion provided on the base plate, a circulation portion provided on the cooling portion, a heating portion provided on the cooling portion, a slitting machine provided on the base plate, the slitting machine being located next to the cooling portion, the cooling portion comprising a cooling pool containing coolant, a brush holder provided in the cooling pool, a drain port provided in the cooling pool, bristles provided on the brush holder, and a valve provided on the drain port for controlling the draining of the cooling pool;

[0007] Furthermore, a circulation part is provided in the cooling pool, and the circulation part includes a circulation belt, and the circulation belt has teeth on both sides, and a rubber belt body in the middle. The belt body is sleeved on a contact roller, and the contact roller is provided on the cooling pool through a bracket, and the belt body on the contact roller contacts the slitting roller of the slitting machine;

[0008] Furthermore, a first guide roller is provided below the contact roller, and a second guide roller is provided next to the first guide roller. The first guide roller and the second guide roller are both provided in the cooling pool and located inside the coolant. The first guide roller and the second guide roller are located on the same plane.

[0009] Furthermore, an extrusion wheel is provided on the side of the second guide roller, and the extrusion wheel is provided on the cooling pool. There are two extrusion wheels, one on each side of the circulating belt, and a traction block is provided on the extrusion wheel. The traction block cooperates with the tooth block of the circulating belt. A motor is provided on the extrusion wheel for driving the extrusion wheel to rotate. The extrusion wheel is located above the coolant, and the circulating belt has a raised bent portion above the extrusion wheel.

[0010] Furthermore, a pressing wheel is provided beside the extrusion wheel, the pressing wheel is provided in the cooling pool through a bracket, the pressing wheel is located inside the coolant, the pressing wheel is located above the brush holder, the circulating belt on the pressing wheel contacts the bristles of the brush holder, a third guide roller is provided beside the pressing wheel, the third guide roller is provided on the cooling pool through a bracket, the third guide roller and the contact roller are located on the same plane, and the circulating belt above is kept in a horizontal state;

[0011] Furthermore, a heating unit is provided on the cooling pool, and the heating unit includes a support frame, a hot air head is provided on the support frame, and the hot air head is located above the circulating belt between the third guide roller and the contact roller and faces the opposite direction of the circulating belt. A carrying plate is provided on the support frame, and the circulating belt is located between the hot air head and the carrying plate, and the carrying plate is used to receive the blown water;

[0012] Furthermore, a liquid inlet pipe is provided in the cooling pool, the liquid inlet pipe is connected to an external pipeline, and the portion of the liquid inlet pipe located in the cooling pool has several protruding outlets, the outlets facing the brush rack, for flushing the copper chips remaining on the brush rack;

[0013] Furthermore, the circulating belt can also be made of high molecular elastomers such as polyurethane and silicone, and the bristles can be made of natural pig hair, wool, artificial nylon 6, nylon 66, PET and other high molecular materials.

[0014] Beneficial effects of the present invention:

[0015] The endless circulating belt replaces the sticking roller, and the extrusion wheel drives the circulating belt to run continuously and work uninterruptedly, avoiding the downtime caused by replacing the sticking roller and improving the slitting machine utilization rate;

[0016] The hot air head periodically softens the surface of the rubber belt to restore its adsorption capacity and avoid the decrease in viscosity caused by copper powder accumulation. The life of the circulating belt is longer than that of traditional adhesive rollers, reducing the frequency of replacement.

[0017] The speed of the extrusion wheel is synchronized with the slitting machine, and the motor frequency conversion control ensures the stable tension of the circulating belt, avoids slipping or breaking, and reduces equipment downtime;

[0018] The copper powder on the shallow layer of the circulating belt surface is squeezed out through the raised bend above the squeezing roller to remove the copper powder. The copper powder in the deeper layer is removed through the pressing wheel and the brush holder with bristles to ensure the repeated use of the circulating belt.

[0019] Through the closed-loop system of "adsorption, cooling and solidification, mechanical removal, and thermal regeneration", the pain points of low utilization rate and frequent replacement of traditional adhesive rollers have been overcome. While ensuring the copper powder removal rate, the slitting efficiency has been significantly improved, making it suitable for mass production scenarios of high-precision PCB copper foil and lithium battery copper foil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure diagram of a copper powder removal device for electrolytic copper foil slitting is invented;

[0021] Figure 2 A schematic diagram of the internal structure of a copper powder removal device for electrolytic copper foil slitting is provided;

[0022] Figure 3 A schematic diagram of the cooling structure of a copper powder removal device for electrolytic copper foil slitting is provided;

[0023] Figure 4 A schematic diagram of the circulation structure of a copper powder removal device for electrolytic copper foil slitting is provided;

[0024] Figure 5 A schematic diagram of the partial structure of the circulation part of a copper powder removal device for electrolytic copper foil slitting is provided;

[0025] Figure 6A schematic diagram of the heating structure of a copper powder removal device for electrolytic copper foil slitting is provided;

[0026] In the figure: 1. Bottom plate; 2. Cooling part; 21. Cooling tank; 22. Brush holder; 23. Brush bristles; 24. Liquid drain port; 25. Liquid inlet pipe; 3. Heating part; 31. Support frame; 32. Hot air head; 33. Loading plate; 4. Circulation part; 41. Circulation belt; 42. Tooth block; 43. Belt body; 44. Contact roller; 45. First guide roller; 46. Second guide roller; 47. Extrusion wheel; 48. Pressing roller; 49. Third guide roller; 410. Raised bending part; 5. Slitting machine; 6. Slitting roller. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] As shown in the figure, the present invention provides a copper powder removal device for slitting electrolytic copper foil, comprising a base plate 1, a cooling portion 2 provided on the base plate 1, a circulation portion 4 provided on the cooling portion 2, a heating portion 3 provided on the cooling portion 2, a slitting machine 5 provided on the base plate 1, and the slitting machine 5 located next to the cooling portion 2, the cooling portion 2 comprising a cooling pool 21, the cooling pool 21 containing coolant, a brush holder 22 provided in the cooling pool 21, a drain port 24 provided in the cooling pool 21, bristles 23 provided on the brush holder 22, and a valve provided on the drain port 24 for controlling the draining of the cooling pool 21;

[0032] Furthermore, a circulation unit 4 is provided in the cooling pool 21. The circulation unit 4 includes a circulation belt 41. The circulation belt 41 has teeth 42 on both sides and a rubber belt body 43 in the middle. The belt body 43 is sleeved on a contact roller 44. The contact roller 44 is provided on the cooling pool 21 through a bracket. The belt body 43 on the contact roller 44 contacts the slitting roller 6 of the slitting machine 5.

[0033] Furthermore, a first guide roller 45 is provided below the contact roller 44, and a second guide roller 46 is provided next to the first guide roller 45. The first guide roller 45 and the second guide roller 46 are both provided in the cooling pool 21 and are located inside the coolant. The first guide roller 45 and the second guide roller 46 are located on the same plane.

[0034] Furthermore, an extrusion wheel 47 is provided beside the second guide roller 46. The extrusion wheel 47 is provided on the cooling pool 21. There are two extrusion wheels 47, one on each side of the circulating belt 41. The extrusion wheel 47 has a traction block, which cooperates with the tooth block 42 of the circulating belt 41. The extrusion wheel 47 is provided with a motor for driving the extrusion wheel 47 to rotate. The extrusion wheel 47 is located above the coolant, and the circulating belt 41 has a raised bent portion 410 above the extrusion wheel 47.

[0035] Furthermore, a pressing wheel is provided beside the extrusion wheel 47. The pressing wheel is provided in the cooling pool 21 through a bracket. The pressing wheel is located inside the coolant and above the brush holder 22. The circulating belt 41 on the pressing wheel contacts the bristles 23 of the brush holder 22. A third guide roller 49 is provided beside the pressing wheel. The third guide roller 49 is provided on the cooling pool 21 through a bracket. The third guide roller 49 and the contact roller 44 are located on the same plane, and the circulating belt 41 above is kept horizontal.

[0036] Furthermore, a heating unit 3 is provided on the cooling pool 21. The heating unit 3 includes a support frame 31. A hot air blower head 32 is provided on the support frame 31. The hot air blower head 32 is located above the circulating belt 41 between the third guide roller 49 and the contact roller 44 and faces the opposite direction of the circulating belt 41. A supporting plate 33 is provided on the support frame 31. The circulating belt 41 is located between the hot air blower head 32 and the supporting plate 33. The supporting plate 33 is used to receive the blown water.

[0037] Furthermore, a liquid inlet pipe 25 is provided in the cooling pool 21, and the liquid inlet pipe 25 is connected to an external pipeline. The portion of the liquid inlet pipe 25 located in the cooling pool 31 has several protruding outlets, which face the brush holder 22 and are used to flush the copper chips retained on the brush holder 22;

[0038] Furthermore, the circulating belt 41 can also be made of a polymer elastomer such as polyurethane, silicone, etc., and the bristles 23 can be made of a polymer material such as natural pig hair, wool, artificial nylon 6, nylon 66, PET, etc.

[0039] Working principle:

[0040] When in use, the circulating belt 41 is sleeved on the contact roller 44, the first guide roller 45, the second guide roller 46, the extrusion wheel 47, the pressing wheel and the third guide roller 49 to form a closed loop, and coolant is added to the cooling pool 21. The liquid level is 2 / 3 of the depth of the cooling pool 21. The motor on the extrusion wheel 47 is controlled to drive the extrusion wheel 47 to drive the circulating belt 41 along each roller through the traction block and the tooth block 42 of the circulating belt 41. During the operation, the slitting machine 5 is started, and the copper foil is cut by the slitting roller 6. At this time, the rubber material on the circulating belt 41 is heated. The fan head 32 is heated, and the surface is slightly softened and sticky. When passing through the slitting machine 5, the copper powder at the incision is adhered by the circulating belt 41 on the contact roller 44. The circulating belt 41 carries the copper powder into the coolant of the cooling pool 21. The distance between the first guide roller 45 and the second guide roller 46 allows the circulating belt 41 to cool in the coolant for a certain period of time, thereby cooling the circulating belt 41 and hardening the rubber material circulating belt 41. The extrusion wheels 47 on both sides drive the circulating belt 41 through the traction block and the tooth block 42 of the circulating belt 41. At the same time, the extrusion wheels 47 on both sides drive the circulating belt 41 through the traction block and the tooth block 42 of the circulating belt 41. The circulating belt 41 on the 7 has a small raised bend 410. The inner layer of the bend is the side where the copper powder adheres. During the continuous operation of the extrusion wheel 47, the bend continuously squeezes the copper powder on the inner side, causing the surface copper powder to fall into the cooling pool 21 below. When the circulating belt 41 passes through the pressing roller 48, the bristles 23 on the brush holder 22 below the pressing roller 48 brush the side of the circulating belt 41 where the copper powder adheres, removes the deeper copper powder, and leaves it in the cooling pool 21 to prevent the copper powder from flying and causing secondary pollution. The circulating belt 41 passes through the third guide roller 49. The brush enters the support frame 31 again, and the hot air blower head 32 is used to dry and heat the circulating belt 41, so that the surface of the rubber circulating belt 41 is slightly softened and becomes sticky again for reuse. At the same time, the carrying plate 33 receives the blown water and the slightly melted rubber after heating. When cleaning the cooling pool 21, the valve on the drain port 24 is opened to release the coolant copper powder and rubber particles in the cooling pool 21. The copper powder left on the bristles 23 of the brush holder 22 is washed away by the water jets at the outlets of the liquid inlet pipe 25, so as to prevent the copper powder from accumulating on the brush holder 22.

[0041] The endless circulating belt 41 replaces the sticking roller, and the squeezing wheel 47 drives the circulating belt 41 to run continuously and work uninterruptedly, thus avoiding the downtime caused by replacing the sticking roller and improving the utilization rate of the slitting machine 5;

[0042] The hot air head 32 periodically softens the surface of the rubber belt 43 to restore its adsorption capacity and avoid the decrease in viscosity caused by the accumulation of copper powder. The service life of the circulating belt 41 is longer than that of traditional adhesive rollers, reducing the replacement frequency.

[0043] The rotation speed of the extrusion wheel 47 is synchronized with the slitting machine 5, and the motor frequency conversion control is used to ensure the stability of the tension of the circulating belt 41, avoid slipping or breaking, and reduce equipment downtime;

[0044] The copper powder on the surface of the circulating belt 41 is squeezed out by the raised bent portion 410 above the squeezing roller to remove the copper powder. The copper powder on the deeper layer is removed by the pressing wheel and the brush holder 22 with bristles 23 to ensure the reusability of the circulating belt 41.

[0045] Through the closed-loop system of "adsorption, cooling and solidification, mechanical removal, and thermal regeneration", the pain points of low utilization rate and frequent replacement of traditional adhesive rollers have been overcome. While ensuring the copper powder removal rate, the slitting efficiency has been significantly improved, making it suitable for mass production scenarios of high-precision PCB copper foil and lithium battery copper foil.

[0046] The above shows and describes the basic principles, main features, and advantages of the present invention. The various components mentioned in the present invention are conventional technologies in the prior art. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A copper powder removal device for electrolytic copper foil slitting, characterized in that: The invention comprises a bottom plate (1), a cooling part (2) is arranged on the bottom plate (1), a circulation part (4) is arranged on the cooling part (2), a heating part (3) is arranged on the cooling part (2), a slitting machine (5) is arranged on the bottom plate (1), and the slitting machine (5) is located next to the cooling part (2), the cooling part (2) comprises a cooling pool (21), a cooling liquid is contained in the cooling pool (21), a brush holder (22) is arranged in the cooling pool (21), a liquid discharge port (24) is arranged in the cooling pool (21), bristles (23) are arranged on the brush holder (22), and a valve is arranged on the liquid discharge port (24) for controlling the discharge of liquid from the cooling pool (21).

2. The copper powder removing device for electrolytic copper foil slitting according to claim 1, characterized in that: A circulation section (4) is provided in the cooling pool (21), and the circulation section (4) includes a circulation belt (41), tooth blocks (42) are provided on both sides of the circulation belt (41), and a belt body (43) made of rubber material is provided in the middle. The belt body (43) is sleeved on a contact roller (44), and the contact roller (44) is provided on the cooling pool (21) through a bracket. The belt body (43) on the contact roller (44) contacts the slitting roller (6) of the slitting machine (5).

3. The copper powder removing device for electrolytic copper foil slitting according to claim 2, characterized in that: A first guide roller (45) is provided below the contact roller (44), and a second guide roller (46) is provided next to the first guide roller (45). The first guide roller (45) and the second guide roller (46) are both provided in the cooling pool (21) and located inside the cooling liquid. The first guide roller (45) and the second guide roller (46) are located on the same plane.

4. The copper powder removing device for electrolytic copper foil slitting according to claim 3, characterized in that: An extrusion wheel (47) is provided beside the second guide roller (46), and the extrusion wheel (47) is provided on the cooling pool (21). There are two extrusion wheels (47), which are respectively located on both sides of the circulating belt (41). A traction block is provided on the extrusion wheel (47), and the traction block cooperates with the tooth block (42) of the circulating belt (41). A motor is provided on the extrusion wheel (47) for driving the extrusion wheel (47) to rotate. The extrusion wheel (47) is located above the coolant, and the circulating belt (41) has a raised bending portion (410) located above the extrusion wheel (47).

5. The copper powder removing device for electrolytic copper foil slitting according to claim 4, characterized in that: A pressing wheel is arranged beside the extrusion wheel (47), and the pressing wheel is arranged in the cooling pool (21) through a bracket. The pressing wheel is located inside the coolant and above the brush rack (22). The circulating belt (41) on the pressing wheel contacts the bristles (23) of the brush rack (22). A third guide roller (49) is arranged beside the pressing wheel, and the third guide roller (49) is arranged on the cooling pool (21) through a bracket. The third guide roller (49) and the contact roller (44) are located on the same plane, and the circulating belt (41) above is kept in a horizontal state.

6. The copper powder removing device for electrolytic copper foil slitting according to claim 5, characterized in that: The cooling pool (21) is provided with a heating part (3), the heating part (3) includes a support frame (31), a hot air head (32) is provided on the support frame (31), the hot air head (32) is located above the circulating belt (41) between the third guide roller (49) and the contact roller (44), and faces the opposite direction of the movement of the circulating belt (41), a supporting plate (33) is provided on the support frame (31), the circulating belt (41) is located between the hot air head (32) and the supporting plate (33), and the supporting plate (33) is used to receive the blown water.

7. The copper powder removing device for electrolytic copper foil slitting according to claim 6, characterized in that: A liquid inlet pipe (25) is provided in the cooling pool (21), and the liquid inlet pipe (25) is connected to an external pipeline. The portion of the liquid inlet pipe (25) located in the cooling pool (21) has a plurality of protruding outlets, and the outlets face the brush rack (22) and are used to flush copper chips retained on the brush rack (22).

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