Corona gap conditioning device
By adjusting the gap between the ceramic electrode and the corona roller using a corona gap adjustment device, the problems of complicated and costly corona treatment methods are solved, resulting in better corona treatment effects and improved aluminum foil surface properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU FIVE STAR ALUMINUM
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-05
AI Technical Summary
In existing technologies, corona treatment methods are complex, have poor corona effects, and are costly, leading to production instability and increased energy consumption, which affects the performance and production efficiency of aluminum foil.
A corona gap adjustment device is adopted. By installing a corona roller and a support on the frame, and installing a telescopic mechanism and a ceramic electrode on the support, the gap between the ceramic electrode and the corona roller is adjusted. Combined with the gap measuring device, precise measurement and adjustment are achieved, thereby improving the corona effect.
It improves the surface roughness and degreasing effect of aluminum foil, increases surface tension, reduces production costs, improves production efficiency and energy efficiency, and enhances the dyne value and surface cleanliness of aluminum foil.
Smart Images
Figure CN224323570U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum foil processing technology, and in particular to a corona gap adjustment device for aluminum foil. Background Technology
[0002] Battery aluminum foil requires good surface tension and high surface cleanliness during gravure printing. High oil content and low surface tension can cause issues like dotted, sheet-like, and snowflake-like missed coatings. Therefore, battery aluminum foil needs degreasing and corona treatment to increase surface roughness and improve hydrophilicity. The degreasing stage typically involves adding baking equipment and corona treatment to remove oil, increase hydrophilic groups, and improve the dyne value. In actual production, the corona treatment effect is often improved by increasing the number of corona treatment cycles, the number of corona treatment units, and the corona power.
[0003] However, increasing the number of corona treatments adds to the production process, making the corona treatment method more complex, and introducing many instabilities into the production process. This increases energy consumption and reduces production efficiency, and the added steps also introduce production risks such as defects in the aluminum foil like pitting and unevenness. Multiple corona treatments can also affect the tensile and elongation properties of the aluminum foil. Increasing the corona power, on the other hand, results in even higher energy consumption. Another existing technical method to improve the corona treatment effect is to add more corona treatment units, but the cost of replacing these units significantly increases production costs.
[0004] Research has shown that adjusting the corona gap can achieve better corona treatment results under the same corona treatment unit, number of corona treatments, and corona treatment power. Therefore, providing a corona gap adjustment device has become a research direction for solving the above-mentioned technical problems. Utility Model Content
[0005] To address the shortcomings of the existing technology, this utility model proposes a corona gap adjustment device to solve the problems of complex corona methods, poor corona effect, and high cost.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0007] This utility model provides a corona gap adjustment device, comprising: a frame, a corona roller disposed on the frame and rotatably connected to the frame, a bracket fixed to the frame and located directly above the corona roller, a telescopic mechanism fixed to the side of the bracket near the corona roller, a ceramic electrode fixed to the side of the telescopic mechanism near the corona roller, and a gap measuring device fixed to the frame; the ceramic electrode is opposite to the corona roller and spaced apart from it, the telescopic mechanism is used to adjust the distance between the ceramic electrode and the corona roller, and the gap measuring device is spaced apart from the corona roller to measure the size of the gap between the ceramic electrode and the corona roller; the telescopic mechanism includes a plurality of screws fixed to the bracket, two nuts sleeved on each screw and screwed to the corresponding screw, a support member sleeved on each screw and located between the two corresponding nuts, and a mounting plate fixed to the side of the support member near the corona roller, and the plurality of ceramic electrodes are fixed to the side of the mounting plate near the corona roller.
[0008] Preferably, the gap measuring device includes a drive unit fixed to one end of the frame near the corona roller, a motor fixed to the output end of the drive unit, a turntable fixed to the output shaft of the motor, and a plurality of feeler gauges fixed to the outer periphery of the turntable and spaced apart from each other, each feeler gauge being tangentially arranged to the turntable; the output end of the drive unit extends and retracts along the axial direction of the corona roller, and the output shaft of the motor is arranged perpendicular to the axial direction of the corona roller; the top of the turntable is horizontally flush with the surface of the corona roller near the ceramic electrode, so that when the turntable rotates any one of the feeler gauges to its highest point, it corresponds to the gap between the ceramic electrode and the corona roller.
[0009] Preferably, the support includes a support body, two connecting plates formed by bending and extending from opposite ends of the support body toward the mounting plate, and a through hole formed through the support body; the screw is disposed in the through hole, and the two connecting plates are fixed to the mounting plate on the side near the mounting plate.
[0010] Preferably, the supporting body and the two connecting plates are integrally formed.
[0011] Preferably, the cross-sectional area of the structure formed by the supporting body and the two connecting plates is a U-shaped structure.
[0012] Preferably, the telescopic mechanism is a pneumatic cylinder or a hydraulic cylinder fixed to the bracket; the output shaft of the pneumatic cylinder or the output shaft of the hydraulic cylinder fixes the mounting plate to the side away from the corona roller.
[0013] Preferably, the plurality of feeler gauges includes a first feeler gauge, a second feeler gauge, a third feeler gauge, and a fourth feeler gauge; the first feeler gauge, the second feeler gauge, the third feeler gauge, and the fourth feeler gauge are evenly distributed along the outer periphery of the turntable, and adjacent feeler gauges are perpendicular to each other along the circumference of the turntable.
[0014] Preferably, the first feeler gauge has a size of 1.0 mm, the second feeler gauge has a size of 1.2 mm, the third feeler gauge has a size of 1.5 mm, and the fourth feeler gauge has a size of 1.8 mm.
[0015] Preferably, the drive unit is a hydraulic cylinder or a pneumatic cylinder.
[0016] Compared with related technologies, in the embodiments of this utility model, a corona roller and a bracket are installed on the frame, and a nut of a telescopic mechanism is installed on the bracket to adjust the position of the mounting plate. The ceramic electrode is fixed to the side of the mounting plate near the corona roller. During the adjustment of the nut, the gap between the ceramic electrode and the corona roller is adjusted. In this way, the corona effect is improved by adjusting the gap between the ceramic electrode and the corona roller, which increases the surface roughness, degreasing effect and surface tension of the aluminum foil. The gap measuring device is used to measure the gap between the ceramic electrode and the corona roller. The measurement is convenient and has high accuracy. Attached Figure Description
[0017] The present invention will now be described in detail with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand through the detailed description in conjunction with the following drawings. In the drawings:
[0018] Figure 1 This is a schematic diagram of the corona gap adjustment device provided in Embodiment 1 of this utility model;
[0019] Figure 2 for Figure 1 A magnified view of part A;
[0020] Figure 3 This is a schematic diagram of the corona gap adjustment device provided in Embodiment 2 of this utility model.
[0021] Among them, 100, corona gap adjustment device; 1, frame; 2, corona roller; 3, bracket; 4, telescopic mechanism; 41, screw; 42, nut; 43, support component; 431, support body; 432, connecting plate; 44, mounting plate; 5, ceramic electrode; 6, gap measuring device; 61, drive unit; 62, motor; 63, turntable; 64, feeler gauge; 641, first feeler gauge; 642, second feeler gauge; 643, third feeler gauge; 644, fourth feeler gauge.
[0022] 200. Corona gap adjustment device; 24. Telescopic mechanism. Detailed Implementation
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application, are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Please see Figures 1-2 As shown, this utility model embodiment provides a corona gap adjustment device 100, including: a frame 1, a corona roller 2 disposed on the frame 1 and rotatably connected to the frame 1, a bracket 3 fixed to the frame 1 and located directly above the corona roller 2, a telescopic mechanism 4 fixed to the side of the bracket 3 near the corona roller 2, a ceramic electrode 5 fixed to the side of the telescopic mechanism 4 near the corona roller 2, and a gap measuring device 6 fixed to the frame 1; the ceramic electrode 5 is directly opposite to the corona roller 2 and spaced apart from it, and the gap measuring device 6 is spaced apart from the corona roller 2 and is used to measure the gap between the ceramic electrode 5 and the corona roller 2. By installing the corona roller 2 and the bracket 3 on the frame 1, and installing the telescopic mechanism 4 on the bracket 3 to adjust the gap between the ceramic electrode 5 and the corona roller 2, adjusting the gap between the ceramic electrode 5 and the corona roller 2 improves the corona effect and increases the surface roughness, degreasing effect, and surface tension of the aluminum foil.
[0027] In this embodiment, the telescopic mechanism 4 includes multiple screws 41 fixed to the bracket 3, two nuts 42 sleeved on and screwed to each screw 41, a support member 43 sleeved on each screw 41 and located between the corresponding two nuts 42, and a mounting plate 44 fixed to the support member on the side near the corona roller 2; the mounting plate 44 is fixed to the support member 43 on the side near the corona roller 2. Multiple ceramic electrodes 5 are fixed to the mounting plate 44 on the side near the corona roller 2. By installing and fixing the ceramic electrodes 5 on the mounting plate 44, and installing the telescopic mechanism 4 between the mounting plate 44 and the bracket 3 to adjust the telescopic position of the mounting plate 44, the gap between the ceramic electrodes 5 and the corona roller 2 can be automatically adjusted. Two nuts 42 are used to support the position of the limiting support 43 on the screw 41. When it is necessary to adjust the gap between the ceramic electrode 5 of the mounting plate 44 and the corona roller 2, the two nuts 42 are moved to the corresponding position in the direction of the corona roller 2, thereby adjusting the distance between the support 43 and the corona roller 2, and thus adjusting the gap between the ceramic electrode 5 and the corona roller 2.
[0028] In this embodiment, the gap measuring device 6 includes a drive unit 61 fixed to one end of the frame 1 near the corona roller 2, a motor 62 fixed to the output end of the drive unit 61, a turntable 63 fixed to the output shaft of the motor 62, and a plurality of feeler gauges 64 fixed to the outer periphery of the turntable 63 and spaced apart from each other. Each feeler gauge 64 is tangentially arranged to the turntable 63, and the output end of the drive unit 61 is perpendicular to the axial direction of the corona roller 2. The top of the turntable 63 is horizontally flush with the surface of the corona roller 2 near the ceramic electrode 5. This ensures that when the turntable 63 rotates any one of the feeler gauges 64 to its highest point, it corresponds to the gap between the ceramic electrode 5 and the corona roller 2. The turntable 63 is driven by motor 62 to rotate and the corresponding feeler gauge 64 is aligned with the gap between the ceramic electrode 5 and the corona roller 2. Another drive unit 61 pushes motor 62 to move along the axial direction of corona roller 2 so that feeler gauge 64 can measure the gap. To ensure the accuracy of the adjustment, the test process is carried out by rotating turntable 63 driven by motor 62 to switch different feeler gauges 64 for multiple tests.
[0029] Specifically, the gap between the ceramic electrode 5 and the corona roller 2 is reduced by adjusting the extension of the telescopic mechanism 4, so that the gap between the ceramic electrode 5 and the corona roller 2 reaches the corresponding gap. After adjustment, the distance between the two electrodes is measured using a feeler gauge 64. After the corona gap is adjusted, it is tested using different feeler gauges 64 to measure the gap between the two electrodes.
[0030] In this embodiment, the support member 43 includes a support body 431, two connecting plates 432 formed by bending and extending from opposite ends of the support body 431 toward the mounting plate 44, and a through hole formed through the support body 431. A screw 41 is disposed within the through hole, and the two connecting plates 432 are fixed to the mounting plate 44 on the side closest to the mounting plate 44. The through hole facilitates the passage of the screw 41, and the two nuts 42 facilitate adjustment of the position of the support body 431, thereby adjusting the distance between the connecting plates 432 and the corona roller 2, and consequently, adjusting the gap between the ceramic electrode 5 and the corona roller 2.
[0031] In this embodiment, the supporting body 431 and the two connecting plates 432 are integrally formed. This results in high structural strength and ease of production.
[0032] In this embodiment, the cross-sectional area of the structure formed by the support body 431 and the two connecting plates 432 is a U-shaped structure. This facilitates the installation and fixing of the mounting plate 44, resulting in a good fixing effect of the mounting plate 44.
[0033] In this embodiment, the plurality of feeler gauges 64 include a first feeler gauge 641, a second feeler gauge 642, a third feeler gauge 643, and a fourth feeler gauge 644; the first feeler gauge 641, the second feeler gauge 642, the third feeler gauge 643, and the fourth feeler gauge 644 are evenly distributed along the outer periphery of the turntable 63, and adjacent feeler gauges 64 are perpendicular to each other along the circumference of the turntable 63.
[0034] In this embodiment, the first feeler gauge 641 has a size of 1.0 mm, the second feeler gauge 642 has a size of 1.2 mm, the third feeler gauge 643 has a size of 1.5 mm, and the fourth feeler gauge 644 has a size of 1.8 mm. When neither the smaller nor the larger feeler gauge 64 can be inserted into the two corona gaps, it can be determined that the gap has been adjusted to the specified corona gap.
[0035] In this embodiment, the drive unit 61 is a hydraulic cylinder or a pneumatic cylinder. Hydraulic cylinders or pneumatic cylinders have good pushing effect and are easy to use.
[0036] In this embodiment, after adjustment by the corona gap adjustment device 100, the aluminum foil passing through is subjected to corona treatment, and the results are verified. The specific verification process is as follows.
[0037] 1) Select aluminum foil master rolls from the same rolling mill for corona treatment;
[0038] 2) Use the same machine for production, and adjust the gaps of different corona rollers 2 simultaneously for corona treatment;
[0039] 3) After the finished product is produced by corona discharge, samples are taken to test the dyne value, oil content and residual oil content of the aluminum foil, and the changes in oil spots are observed through surface inspection equipment.
[0040] 4) Record all data from the machine during the experiment;
[0041] 5) Conduct a comprehensive analysis of all the data.
[0042] The measurement data for the corona gaps of 1.3 mm and 1.6 mm are shown in Table 1 below:
[0043] Table 1 Corona gaps of 1.3 mm and 1.6 mm
[0044]
[0045] The gap measurement data for 1.3mm and 1.6mm dimensions are shown in Table 2 below:
[0046] Table 2. Oil content test data for corona gaps of 1.3 mm and 1.6 mm.
[0047]
[0048] Based on Tables 1 and 2 above, it can be seen that under a 1.3mm gap, the number of corona spots decreases from 83 to 0, from 51 to 5, and from 163 to 68 after one pass of production at speeds of 100m / min, 150m / min, and 200m / min, respectively. Under a second corona treatment, the number of spots decreases from 5 to 0 and from 68 to 2. Under a 1.6mm gap, the number of corona spots decreases from 31 to 11, from 46 to 15, and from 26 to 13 after one pass of production at speeds of 100m / min, 150m / min, and 200m / min, respectively. Under a second corona treatment, the number of spots decreases from 11 to 2, from 15 to 6, and from 13 to 5.
[0049] A comparison showed that the product had a good oil spot removal effect at a low speed of 100m / min with a 1.3mm gap. It could remove almost all the scattered oil spots in the first corona treatment. When the rewinding speed was increased to 150m / min, some oil spots could not be removed by corona treatment. At a speed of 200m / min, only 59% of the oil spots could be removed in one pass. At all three speeds, almost all oil spots could be removed in the second corona treatment.
[0050] The comparison shows that the dyne values are higher when the gap is 1.3mm than those of other machines.
[0051] When the gap is 1.3mm, production at a speed of less than 150m / min can break up almost 90% of the oil stains;
[0052] When producing at a speed of 200m / min, the oil spots will be broken up and become smaller, but whitish traces can still be seen.
[0053] Therefore, by adjusting the corona gap of the single corona generator, the dyne value of the aluminum foil surface after primary corona treatment increased by 18.9%, and the dyne value of the aluminum foil surface after secondary corona treatment increased by 12%.
[0054] Improved energy efficiency: At the same power, the corona effect after adjustment is higher than before adjustment.
[0055] The surface dyne value decays over a long period of time: without any protection, it takes 32 days for the dyne value of aluminum foil to decay to 33 dyn, and 65 days for the dyne value to decay from 33 to 31.
[0056] Example 2
[0057] Please see Figure 1 and Figure 3 As shown, this utility model provides a corona gap adjustment device 200. This second embodiment has the same basic structure as the first embodiment, the difference being that in this embodiment, the telescopic mechanism 24 is a pneumatic or hydraulic cylinder fixed to the bracket; the output shaft of the pneumatic or hydraulic cylinder is fixed to the side of the mounting plate 44 away from the corona roller 2. The mounting plate 44 is moved up and down by the hydraulic or pneumatic cylinder driving the corresponding output end, thereby adjusting the gap between the ceramic electrode 5 fixed on the mounting plate 44 and the corona roller 2.
[0058] Compared with related technologies, in the embodiments of this utility model, a corona roller and a bracket are installed on the frame, and a nut of a telescopic mechanism is installed on the bracket to adjust the position of the mounting plate. The ceramic electrode is fixed to the side of the mounting plate near the corona roller. During the adjustment of the nut, the gap between the ceramic electrode and the corona roller is adjusted. In this way, the corona effect is improved by adjusting the gap between the ceramic electrode and the corona roller, which increases the surface roughness, degreasing effect and surface tension of the aluminum foil. The gap measuring device is used to measure the gap between the ceramic electrode and the corona roller. The measurement is convenient and has high accuracy.
[0059] It should be noted that the various embodiments described above with reference to the accompanying drawings are only illustrative of the present invention and not intended to limit its scope. Those skilled in the art should understand that any modifications or equivalent substitutions made to the present invention without departing from its spirit and scope should be covered within the scope of the present invention. Furthermore, unless the context otherwise requires, singular terms include plural forms, and vice versa. Additionally, unless specifically stated otherwise, all or part of any embodiment may be used in conjunction with all or part of any other embodiment.
Claims
1. A corona gap adjustment device, characterized in that, include: The device comprises a frame, a corona roller mounted on and rotatably connected to the frame, a bracket fixed to the frame and located directly above the corona roller, a telescopic mechanism fixed to the bracket near the corona roller, ceramic electrodes fixed to the telescopic mechanism near the corona roller, and a gap measuring device fixed to the frame. The ceramic electrodes are opposite to and spaced apart from the corona roller. The telescopic mechanism is used to adjust the distance between the ceramic electrodes and the corona roller. The gap measuring device is spaced apart from the corona roller and used to measure the gap between the ceramic electrodes and the corona roller. The telescopic mechanism includes multiple screws fixed to the bracket, two nuts sleeved on each screw and screwed to the corresponding screw, a support member sleeved on each screw and located between the two corresponding nuts, and a mounting plate fixed to the support member near the corona roller. The multiple ceramic electrodes are fixed to the mounting plate near the corona roller.
2. The corona gap adjusting device according to claim 1, characterized in that, The gap measuring device includes a drive unit fixed to one end of the frame near the corona roller, a motor fixed to the output end of the drive unit, a turntable fixed to the output shaft of the motor, and a plurality of feeler gauges fixed to the outer periphery of the turntable and spaced apart from each other, each feeler gauge being tangentially arranged to the turntable; the output end of the drive unit extends and retracts along the axial direction of the corona roller, and the output shaft of the motor is perpendicular to the axial direction of the corona roller; the top of the turntable is horizontally flush with the surface of the corona roller near the ceramic electrode, so that when the turntable rotates any one of the feeler gauges to its highest point, it corresponds to the gap between the ceramic electrode and the corona roller.
3. The corona gap adjusting device according to claim 1, characterized in that, The support includes a support body, two connecting plates formed by bending and extending from opposite ends of the support body toward the mounting plate, and a through hole formed through the support body; the screw is disposed in the through hole, and the two connecting plates are fixed to the mounting plate on the side near the mounting plate.
4. The corona gap adjusting device according to claim 3, characterized in that, The supporting body and the two connecting plates are integrally formed.
5. The corona gap adjusting device according to claim 4, characterized in that, The cross-sectional area of the structure formed by the supporting body and the two connecting plates is a U-shaped structure.
6. The corona gap adjusting device according to claim 1, characterized in that, The telescopic mechanism is a pneumatic cylinder or a hydraulic cylinder fixed to the bracket; the output shaft of the pneumatic cylinder or the output shaft of the hydraulic cylinder fixes the mounting plate to the side away from the corona roller.
7. The corona gap adjusting device according to claim 2, characterized in that, The plurality of feeler gauges includes a first feeler gauge, a second feeler gauge, a third feeler gauge, and a fourth feeler gauge; the first feeler gauge, the second feeler gauge, the third feeler gauge, and the fourth feeler gauge are evenly distributed along the outer periphery of the turntable, and adjacent feeler gauges are perpendicular to each other along the circumference of the turntable.
8. The corona gap adjusting device according to claim 7, characterized in that, The first feeler gauge has a size of 1.0 mm, the second feeler gauge has a size of 1.2 mm, the third feeler gauge has a size of 1.5 mm, and the fourth feeler gauge has a size of 1.8 mm.
9. The corona gap adjusting device according to claim 2, characterized in that, The drive unit is a hydraulic cylinder or a pneumatic cylinder.