An apparatus for producing an aluminum electrolytic capacitor formation foil

Abstract

The application discloses a production device for aluminum electrolytic capacitor formation foil, and relates to the technical field of aluminum electrolytic capacitors, which comprises a drying tank, a cover plate is installed at the upper end of the drying tank, two through holes are formed in the side wall of the cover plate, and the through holes are used for the aluminum foil to enter and exit the drying tank; a drying assembly is arranged at the inner end of the drying tank, and a drying cavity is formed between the drying assembly and the drying tank. The aluminum foil after the oxidation film repair groove is conveyed into the drying tank from one of the through holes under the conveying of the conveying roller, is guided in the drying cavity under the guidance of the guide assembly, is dried back and forth, is finally taken out of the drying tank from the other through hole and is connected with the winding roller of the aluminum foil, is wound, the drying of the aluminum foil is completed, the time of the aluminum foil in the drying tank is increased under the premise of not reducing the conveying speed of the aluminum foil, the volume of the drying device is reduced, and the production efficiency is improved under the premise of ensuring the drying effect.

Description

Technical Field

[0001] This invention relates to the field of aluminum electrolytic capacitor technology, specifically to a production apparatus for forming aluminum electrolytic capacitor foil. Background Technology

[0002] The aluminum electrolytic capacitor foil production equipment is a specialized device used for anodizing etched aluminum foil. Its core function is to generate a dense, uniform aluminum oxide dielectric film on the surface of the aluminum foil. The performance of this film directly determines the capacitor's withstand voltage, leakage current, and service life.

[0003] The general low-voltage process flow for aluminum electrolytic capacitor foil formation is as follows: etched aluminum foil passes through formation tank 1—liquid feeding tank 1—formation tank 2—formation tank 3—liquid feeding tank 2—formation tank 4—(formation tank 5—liquid feeding tank 3—formation tank 6, etc.)—deionized water cleaning tank—phosphoric acid solution depolarization treatment tank—deionized water cleaning tank—oxide film repair tank—high-temperature baking oven—oxide film repair tank—drying—winding—inspection—warehousing. Drying the aluminum electrolytic capacitor foil is an important step in its production process.

[0004] Currently, commonly used drying equipment in the industry typically employs a combination of high-power heating elements and high-flow-rate fans to generate high-temperature, high-speed hot airflow that directly impacts the surface of the aluminum foil. Since the surface of the aluminum foil after formation already has an extremely fragile and dense oxide film, this dielectric film is characterized by high brittleness and relatively weak adhesion. Excessive airflow impact can directly damage the newly formed microscopic oxide film structure, leading to microcracks or peeling of the film layer, thereby introducing fatal defects such as increased leakage current and decreased withstand voltage performance. If low-temperature and low-speed hot airflow is used, the aluminum foil's moving speed needs to be reduced or the volume of the drying equipment increased, significantly extending the drying time and resulting in low production efficiency. Summary of the Invention

[0005] This invention provides a production apparatus for aluminum electrolytic capacitor foil, which solves the problems mentioned in the background art, such as high temperature and high speed hot air flow may directly destroy the newly formed micro-oxide film structure, while low temperature and low speed hot air flow will greatly prolong the drying time, resulting in low production efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a production apparatus for forming aluminum electrolytic capacitor foil, comprising: A drying tank is equipped with a cover plate at the top. Two through holes are opened on the side wall of the cover plate for aluminum foil to enter and exit the drying tank. A drying assembly is disposed at the inner end of the drying tank, and a drying chamber is formed between the drying assembly and the drying tank for drying the incoming aluminum foil; The guide assembly is fixed to the inner wall of the drying tank by a fixing block. The guide assembly is located inside the drying chamber and is used to fold and guide the aluminum foil back and forth inside the drying chamber.

[0007] This invention also includes the following technical features: In one embodiment of the present invention, the fixing block is convex, one end of the fixing block is fixed to the inner wall of the drying tank, and the upper and lower sides of the other end are connected to the guide assembly, and a buffer structure is provided between the fixing block and the guide assembly. The buffer structure is used to adjust the tension on the aluminum foil.

[0008] In one embodiment of the present invention, the drying assembly includes a ring fixed at the middle of the inner end of the drying tank, a plurality of drying plates are uniformly fixedly installed on the outer end of the ring, and the inner ends of the ring and the drying plates are provided with communicating air chambers, and an air inlet pipe communicating with the air chambers is fixedly installed on the lower end of the ring.

[0009] In one embodiment of the present invention, a plurality of downwardly inclined air nozzles are fixedly installed at both the left and right ends of the drying plate, and electric heating wires are fixedly installed at both the left and right ends of the drying plate, the electric heating wires being located at the outer ends of the air nozzles.

[0010] In one embodiment of the present invention, the guide assembly includes a circular tube rotatably connected to the upper and lower sides of the other end of the fixed block. One end of the circular tube is closed, and the outer end of the circular tube is rotatably connected to a conical roller through a sealed bearing. The roller is composed of multiple independent hollow frustums, each of which can rotate freely. The roller is located between two adjacent drying plates.

[0011] In one embodiment of the present invention, multiple sets of air holes are provided on the circular tube and the rotating roller, and each set of air holes is located between two adjacent sealed bearings.

[0012] In one embodiment of the present invention, a flexible tube is fixedly installed at the other end of the circular tube, and an air inlet pipe three is fixedly installed at the end of the flexible tube away from the circular tube. The air inlet pipe three passes through the side wall of the drying tank and is fixedly installed with a ring pipe. Multiple connecting pipes are fixedly installed between the two ring pipes, and an air inlet pipe two is fixedly installed on the side wall of one of the ring pipes.

[0013] In one embodiment of the present invention, the buffer structure includes a sliding groove formed on the upper and lower sides of the other end of the fixed block, one end of the sliding groove having a communicating strip hole, a slider being slidably connected in the sliding groove, a spring being fixedly installed between the slider and the bottom end of the sliding groove, and a damper being sleeved inside the spring.

[0014] In one embodiment of the present invention, the other end of the circular tube passes through the strip hole and the slider in sequence and is fixedly connected to the slider. When the circular tube is in a balanced state, the flexible tube is in a bent state, and the length of the bent flexible tube is greater than the distance of the radial movement of the circular tube.

[0015] In one embodiment of the present invention, two sets of guide rollers are installed on the upper end of the cover plate, and a set of guide rollers is provided on the upper end of each through hole, and a support block is fixedly installed on the bottom end of the drying tank.

[0016] This invention provides a production apparatus for forming aluminum electrolytic capacitor foil. It has the following beneficial effects: By setting up a drying component and a guiding component inside the drying tank, the aluminum foil, after passing through the oxide film repair tank, is conveyed by the conveying roller and enters the drying tank through one of the through holes. Under the guidance of the guiding component, it is folded back and forth in the drying chamber for drying. Finally, it exits the drying tank through another through hole and connects to the aluminum foil winding roller for winding, thus completing the drying of the aluminum foil. This increases the residence time of the aluminum foil in the drying tank without reducing the aluminum foil conveying speed, and reduces the volume of the drying device, thereby improving production efficiency while ensuring the drying effect. Attached Figure Description

[0017] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the inner end structure of the drying tank of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure of region A in the middle; Figure 5 This is a schematic diagram of the drying assembly and guiding assembly of the present invention; Figure 6 This is a schematic diagram of the guiding component and drying plate structure of the present invention; Figure 7 This is a schematic diagram of the buffer structure of the present invention; Figure 8 This is a schematic diagram of the roller structure of the present invention.

[0018] In the picture: 10. Drying tank; 11. Cover plate; 111. Through hole; 12. Guide roller; 13. Support block; 14. Air outlet pipe; 15. Air inlet pipe one; 16. Ring pipe; 161. Connecting pipe; 162. Air inlet pipe two; 17. Air inlet pipe three; 1. Ring body; 21. Drying plate; 22. Mounting plate; 23. Electric heating wire; 24. Air nozzle; 30. Fixed block; 31. Slide groove; 311. Strip hole; 32. Slider; 33. Damper; 34. Spring; 40. Round tube; 41. Rotary roller; 411. Air hole; 42. Sealed bearing; 43. Flexible hose. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 a part of the embodiments of the present invention, not all of them. 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. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Please see Figure 1-8 This invention provides a technical solution: a production apparatus for aluminum electrolytic capacitor foil, comprising a drying tank 10, with multiple support blocks 13 fixedly installed at the bottom of the drying tank 10. A gap is provided between adjacent support blocks 13 for an air inlet pipe 15 to pass through, and the support blocks 13 support the drying tank 10. A heat insulation layer is provided on the outer wall of the drying tank 10 for heat preservation and insulation. A cover plate 11 is installed at the upper end of the drying tank 10 to cover the upper end of the drying tank 10, preventing rapid and excessive heat loss from the drying tank 10. Two through holes 111 are opened on the side wall of the cover plate 11 for aluminum foil to enter and exit the drying tank 10. After passing through the oxide film repair tank, the aluminum foil enters the drying tank 10 through one through hole 111 under the conveying of the conveying roller. After circulating once inside the drying tank 10 and being dried, it exits the drying tank 10 through the other through hole 111 and connects to the aluminum foil winding roller for winding.

[0021] The drying assembly is located at the inner end of the drying tank 10, and a drying chamber is formed between the drying assembly and the drying tank 10 for drying the incoming aluminum foil. The aluminum foil enters the drying chamber through the through hole 111 and is dried by the drying assembly. The guide assembly is fixed to the inner wall of the drying tank 10 by the fixing block 30. The guide assembly is located in the drying chamber and is used to fold and guide the aluminum foil back and forth in the drying chamber to increase the residence time of the aluminum foil in the drying chamber.

[0022] In the production process of aluminum electrolytic capacitor foil, the aluminum foil after passing through the oxide film repair tank is conveyed by the conveying roller and enters the drying tank 10 through one of the through holes 111. Under the guidance of the guiding component, it is folded back and forth in the drying chamber for drying. Finally, it passes out of the drying tank 10 through another through hole 111 and is connected to the aluminum foil winding roller for winding, thus completing the drying of the aluminum foil.

[0023] In one embodiment, please refer to Figure 1 , Figure 3 , Figure 5 and Figure 6 The drying assembly includes a ring 20 fixed at the middle of the inner end of the drying tank 10. Several drying plates 21 arranged in a circle are uniformly fixed at the outer end of the ring 20. The inner ends of the ring 20 and the drying plates 21 are provided with a communicating air chamber. An air inlet pipe 15 communicating with the air chamber is fixedly installed at the lower end of the ring 20. The lower end of the air inlet pipe 15 passes through the bottom side wall of the drying tank 10 and extends from between two adjacent support blocks 13 to the outer end of the drying tank 10 for connection with an external blower. When the blower is started, air is blown into the air inlet pipe 15 and the air enters the air chamber through the air inlet pipe 15.

[0024] Several downward-sloping air nozzles 24 are fixedly installed at both ends of the drying plate 21. Mounting plates 22 are fixedly installed on the upper and lower sides of both ends of the drying plate 21. An electric heating wire 23 is fixedly installed between two mounting plates 22 on the same side of the drying plate 21. The electric heating wire 23 is located at the outer end of the air nozzles 24. The electric heating wire 23 is a resistance wire and is connected to an external temperature controller and power supply. The electric heating wire 23 heats up after being energized, and heats the inside of the drying tank 10.

[0025] When aluminum foil enters the drying chamber, the blower is started to blow air into the air chamber. The air entering the air chamber is evenly sprayed into the drying chamber through several air nozzles 24 and blown onto the aluminum foil. At the same time, the heat generated by the electric heating wire 23 is evenly blown onto the aluminum foil to dry it evenly.

[0026] In one embodiment, please refer to Figures 3-8 The guiding assembly includes a circular tube 40 rotatably connected to the upper and lower sides of the other end of the fixed block 30. One end of the circular tube 40 is closed. The outer end of the circular tube 40 is rotatably connected to a conical roller 41 through a sealed bearing 42. The roller 41 is composed of multiple independent hollow frustums, each of which can rotate freely to match the linear velocity of the aluminum foil at different lateral positions. The roller 41 is located between two adjacent drying plates 21. The rollers 41 at the upper and lower ends of the fixed block 30 are respectively located at the upper and lower ends of the drying plate 21. The conical rollers 41 on the two adjacent fixed blocks 30 are in opposite directions to prevent the aluminum foil from running off-center on the roller 41.

[0027] Two through holes 111 are located directly above two conical rollers 41. The aluminum foil enters the inner end of the drying tank 10 through one of the through holes 111 and crosses through the two rollers 41 on the same fixed block 30. Then, the aluminum foil passes through the lower end of the drying plate 21 and crosses with the two rollers 41 on the other fixed block 30. After passing through several rollers 41 in sequence, it folds back and forth inside the drying tank 10 and circles around once before exiting the drying tank 10 through another through hole 111 and connecting with the aluminum foil winding roller. This increases the time the aluminum foil stays in the drying tank 10 without reducing the aluminum foil conveying speed, and reduces the volume of the drying device, thus improving production efficiency while ensuring the drying effect.

[0028] In one embodiment, please refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 Multiple sets of air holes 411 are provided on the circular tube 40 and the rotating roller 41. Each independent hollow truncated cone and circular tube 40 is provided with air holes 411. The left and right ends of the hollow truncated cone are rotatably connected to the circular tube 40 through the sealed bearing 42. The air holes 411 are located between two adjacent sealed bearings 42. The sealed bearings 42 allow the gas in the circular tube 40 to be ejected outward through the air holes 411, so that the aluminum foil is in a "semi-suspended" state when passing through the rotating roller 41. This prevents the aluminum foil from coming into close contact with the surface of the rotating roller 41 when it is under tension, thus avoiding damage to the aluminum oxide dielectric film on the surface of the aluminum foil.

[0029] A flexible hose 43 is fixedly installed at the other end of the round tube 40. An air inlet pipe 3 17 is fixedly installed at the end of the flexible hose 43 away from the round tube 40. The air inlet pipe 3 17 passes through the side wall of the drying tank 10 and is fixedly installed with a ring pipe 16. The air inlet pipe 3 17 is fixed on the side wall of the drying tank 10. Multiple connecting pipes 161 are fixedly installed between the two ring pipes 16. An air inlet pipe 2 162 is fixedly installed on the side wall of one of the ring pipes 16. An air outlet pipe 14 is fixedly installed on the lower side wall of the drying tank 10. The air outlet pipe 14 is located on one side of the air inlet pipe 2 162.

[0030] As the jet nozzle 24 sprays air downwards, the hot air inside the drying tank 10 flows to the lower end of the tank. The exhaust pipe 14 is connected to a high-temperature resistant exhaust fan. The exhaust end of the high-temperature resistant exhaust fan is fixedly connected to the inlet pipe 162, which transports the hot air inside the drying tank 10 into the ring pipe 16, and then into the round pipe 40 through the hose 43, and finally sprays it out from the air hole 411, thus recycling the hot air.

[0031] In one embodiment, please refer to Figure 5 and Figure 7The fixing block 30 is convex. One end of the fixing block 30 is fixed to the inner wall of the drying tank 10, and the upper and lower sides of the other end are connected to the guide assembly. A buffer structure is provided between the fixing block 30 and the guide assembly. The buffer structure is used to adjust the tension of the aluminum foil. The buffer structure includes a slide groove 31 opened on the upper and lower sides of the other end of the fixing block 30. One end of the slide groove 31 is provided with a through-hole 311. A slider 32 is slidably connected in the slide groove 31. A spring 34 is fixedly installed between the slider 32 and the bottom end of the slide groove 31. A damper 33 is sleeved in the spring 34. One end of the damper 33 is fixed to the slider 32, and the other end is fixed to the bottom end of the slide groove 31. When the slider 32 is subjected to force, it can slide in the slide groove 31 by squeezing or stretching the spring 34. The damper 33 can make the slider 32 stop sliding quickly when it is not subjected to force.

[0032] The other end of the round tube 40 passes through the strip hole 311 and the slider 32 in sequence, and is fixedly connected to the slider 32. When the round tube 40 is in a balanced state, the flexible tube 43 is in a bent state. The bending length of the flexible tube 43 is greater than the radial movement distance of the round tube 40, ensuring that the slider 32 can slide freely.

[0033] The aluminum foil moves back and forth in the drying tank 10 under the guidance of the rotating roller 41. When the aluminum foil is under tension, it will transmit the tension to the rotating roller 41. The rotating roller 41 will transmit the force to the slider 32. When the slider 32 is under force, it can slide in the groove 31 by squeezing or stretching the spring 34, thereby offsetting the tension.

[0034] In one embodiment, please refer to Figure 1 Two sets of guide rollers 12 are installed on the upper end of the cover plate 11. Each through hole 111 is provided with a set of guide rollers 12. The guide rollers 12 guide the aluminum foil entering the drying tank 10 and exiting the drying tank 10 to prevent it from rubbing against the port of the through hole 111 and damaging the aluminum oxide dielectric film on the surface of the aluminum foil.

[0035] In actual use, the aluminum foil, after passing through the oxide film repair tank, is conveyed by the conveyor rollers and enters the drying tank 10 through one of the through holes 111. Guided by the rotating roller 41, it folds back and forth at the outer ends of several drying plates 21 and circles the inside of the drying tank 10. When the aluminum foil enters the drying chamber, the electric heating wire 23 is simultaneously energized, and the blower and exhaust fan are started at the same time. The blower blows air into the air chamber, and the air entering the air chamber is evenly sprayed into the drying chamber and blown onto the aluminum foil through several air nozzles 24. At the same time, the heat generated by the electric heating wire 23 is evenly blown away. The aluminum foil is dried evenly by a blower that delivers hot air from the drying tank 10 to the ring pipe 16 and then into the round pipe 40 through the hose 43. Finally, the air is sprayed out from the air hole 411, so that the aluminum foil is in a "semi-suspended" state when passing through the roller 41. This prevents the aluminum foil from coming into close contact with the surface of the roller 41 when it is under tension, which would damage the aluminum oxide dielectric film on the surface of the aluminum foil. After the aluminum foil is dried after passing through the roller 10 once, it finally passes out of the drying tank 10 through another through hole 111 and connects to the aluminum foil winding roller to wind it up, thus completing the drying of the aluminum foil.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A production apparatus for forming aluminum electrolytic capacitor foil, characterized in that, include: The drying tank (10) has a cover plate (11) installed at the top. Two through holes (111) are opened on the side wall of the cover plate (11) for aluminum foil to enter and exit the drying tank (10). A drying assembly is disposed at the inner end of the drying tank (10), and a drying chamber is formed between the drying assembly and the drying tank (10) for drying the incoming aluminum foil; The guide assembly is fixed to the inner wall of the drying tank (10) by a fixing block (30). The guide assembly is located inside the drying chamber and is used to fold and guide the aluminum foil back and forth inside the drying chamber.

2. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 1, characterized in that: The fixing block (30) is convex. One end of the fixing block (30) is fixed to the inner wall of the drying tank (10), and the upper and lower sides of the other end are connected to the guide assembly. A buffer structure is provided between the fixing block (30) and the guide assembly. The buffer structure is used to adjust the tension of the aluminum foil.

3. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 1, characterized in that: The drying assembly includes a ring (20) fixed at the middle of the inner end of the drying tank (10). Several drying plates (21) are uniformly fixed at the outer end of the ring (20). The inner ends of the ring (20) and the drying plates (21) are provided with a communicating air chamber. An air inlet pipe (15) communicating with the air chamber is fixedly installed at the lower end of the ring (20).

4. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 3, characterized in that: Several downward-sloping air nozzles (24) are fixedly installed on both the left and right ends of the drying plate (21), and electric heating wires (23) are fixedly installed on both the left and right ends of the drying plate (21). The electric heating wires (23) are located at the outer ends of the air nozzles (24).

5. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 2, characterized in that: The guide assembly includes a circular tube (40) rotatably connected to the upper and lower sides of the other end of the fixed block (30). One end of the circular tube (40) is closed. The outer end of the circular tube (40) is rotatably connected to a conical roller (41) through a sealed bearing (42). The roller (41) is composed of multiple independent hollow frustums, each of which can rotate freely. The roller (41) is located between two adjacent drying plates (21).

6. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 5, characterized in that: Multiple sets of air holes (411) are provided on the circular tube (40) and the rotating roller (41), and each set of air holes (411) is located between two adjacent sealed bearings (42).

7. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 6, characterized in that: A flexible hose (43) is fixedly installed at the other end of the round tube (40). An air inlet pipe three (17) is fixedly installed at the end of the flexible hose (43) away from the round tube (40). The air inlet pipe three (17) passes through the side wall of the drying tank (10) and is fixedly installed with a ring pipe (16). Multiple connecting pipes (161) are fixedly installed between the two ring pipes (16). An air inlet pipe two (162) is fixedly installed on the side wall of one of the ring pipes (16).

8. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 7, characterized in that: The buffer structure includes a slide groove (31) on the upper and lower sides of the other end of the fixed block (30). One end of the slide groove (31) is provided with a through-hole (311). A slider (32) is slidably connected in the slide groove (31). A spring (34) is fixedly installed between the bottom end of the slider (32) and the slide groove (31). A damper (33) is sleeved in the spring (34).

9. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 8, characterized in that: The other end of the round tube (40) passes through the strip hole (311) and the slider (32) in sequence, and is fixedly connected to the slider (32). When the round tube (40) is in a balanced state, the hose (43) is in a bent state. The bending length of the hose (43) is greater than the radial movement distance of the round tube (40).

10. The production apparatus for forming aluminum electrolytic capacitor foil according to claim 1, characterized in that: Two sets of guide rollers (12) are installed on the upper end of the cover plate (11), and a set of guide rollers (12) is provided on the upper end of each through hole (111). A support block (13) is fixedly installed on the bottom end of the drying tank (10).

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