Electrolytic copper foil drying device
The electrolytic copper foil drying device, which combines drive rollers and air knives, utilizes low-temperature air drying and drying technology to solve the problems of coupling agent denaturation and failure and uneven drying, thereby improving the internal properties and appearance quality of the electrolytic copper foil.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG JINBAO ELECTRONICS
- Filing Date
- 2025-03-14
- Publication Date
- 2026-04-14
AI Technical Summary
Existing electrolytic copper foil drying equipment suffers from the degradation and failure of coupling agents during high-temperature baking, leading to a decline in intrinsic performance. Furthermore, uneven drying speed of the copper foil results in water stains and wrinkles, affecting product quality and yield.
The drying device uses a combination of drive rollers and air knives to air dry and dry the copper foil at a temperature below 200℃. The air knife dries both sides of the copper foil evenly, and the squeezing of the squeezing rollers and drive rollers ensures that the copper foil surface dries synchronously.
It effectively avoids the denaturation and failure of coupling agents, improves the synchronous drying of copper foil surfaces, prevents wrinkles, and enhances product appearance and yield.
Smart Images
Figure CN224121618U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrolytic copper foil technology, and in particular to a drying device for electrolytic copper foil. Background Technology
[0002] The surface treatment process for electrolytic copper foil used in printed circuit boards includes pickling, roughening, curing, heat treatment, anti-oxidation treatment, coupling agent treatment, and drying. Drying is the final step in the surface treatment of electrolytic copper foil, typically involving baking at temperatures above 200°C. With the development of high-frequency and high-speed technologies, electrolytic copper foil products are gradually moving towards low profile, ultra-low profile, and even profileless designs. To meet the requirements of high adhesion and heat resistance between the electrolytic copper foil and the resin substrate, special coupling agents are needed to treat the surface of the electrolytic copper foil. However, some coupling agents have poor heat resistance and are prone to denaturation and failure during prolonged high-temperature baking, severely affecting the intrinsic performance of the electrolytic copper foil products.
[0003] Meanwhile, during the drying process, the electrolytic copper foil develops water stains due to asynchronous drying speeds in the width direction. This is especially true for the copper foil lamination surface after coupling agent treatment, where localized dark lines are prone to appear, severely affecting the product's appearance quality. Furthermore, during the drying process, the copper foil travels a long distance between the drive rollers. As the rollers move between each other, the copper foil is easily shaken by the wind, causing wrinkles and resulting in scrap. This significantly impacts the product qualification rate of copper foil production and increases production costs.
[0004] Therefore, it is necessary to develop a copper foil drying device for a copper foil surface treatment machine to solve the above problems. Utility Model Content
[0005] In order to solve the above-mentioned technical problems in the prior art, the present invention provides a drying device for electrolytic copper foil.
[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:
[0007] This utility model provides a drying device for electrolytic copper foil, including a drive roller, an air knife, and an oven. The drive roller and the oven are arranged sequentially along the drive direction of the electrolytic copper foil. There are at least two drive rollers, which are arranged sequentially along the drive direction of the electrolytic copper foil to support and drive the movement of the electrolytic copper foil. The number of air knives is the same as the number of drive rollers, and each air knife is arranged sequentially along the drive direction of the electrolytic copper foil to air dry the electrolytic copper foil supported on each drive roller.
[0008] The electrolytic copper foil drying device provided by this utility model first passes through each air knife for air drying, and then passes through an oven for complete drying. The air knives pre-dry the electrolytic copper foil, and the temperature of the air knives and the oven can be selected below 200℃ to effectively avoid the problem of coupling agent denaturation and failure due to prolonged high-temperature baking. The drive roller works in conjunction with the air knife. Under the support of the drive roller, the air knife completes the air drying treatment of the surface of the electrolytic copper foil, effectively solving the problem of wrinkles caused by the shaking of the copper foil due to wind.
[0009] Based on the above technical solution, the present invention can also be improved in the following ways:
[0010] Furthermore, the drive rollers are not on the same horizontal plane, and two adjacent drive rollers are located on different sides of the electrolytic copper foil.
[0011] The beneficial effects of adopting the above-mentioned further technical solution are as follows: each transmission roller is not on the same horizontal plane, and two adjacent transmission rollers are set at different sides of the electrolytic copper foil. Along the transmission direction of the electrolytic copper foil, the support area of the transmission rollers on the electrolytic copper foil can be increased, that is, the air-drying treatment area of the air knife can be increased, thus improving the air-drying effect. At the same time, two adjacent transmission rollers are located at different sides of the electrolytic copper foil, that is, two adjacent transmission rollers are respectively used to support the pressing surface and the non-pressing surface of the electrolytic copper foil, so that two adjacent air knives are respectively used to air-dry the non-pressing surface and the pressing surface of the electrolytic copper foil, ensuring that each air knife dries both sides of the electrolytic copper foil in advance, thus improving the air-drying effect.
[0012] Furthermore, the transmission roller includes a first transmission roller and a second transmission roller, which are arranged sequentially along the transmission direction of the electrolytic copper foil, with the second transmission roller located below the first transmission roller.
[0013] Furthermore, the air knife includes a first air knife and a second air knife, the first air knife being used to air dry the electrolytic copper foil on the first drive roller, and the second air knife being used to air dry the electrolytic copper foil on the second drive roller.
[0014] Furthermore, the air outlet of the first air knife is aligned with the side of the electrolytic copper foil that is not in contact with the first drive roller, and the air outlet of the second air knife is aligned with the side of the electrolytic copper foil that is not in contact with the second drive roller.
[0015] Furthermore, the air outlets of the first air knife and the second air knife both extend along the width direction of the electrolytic copper foil.
[0016] The beneficial effects of adopting the above-mentioned further technical solution are as follows: the first air knife and the second air knife uniformly dry the surface of the copper foil in the width direction of the electrolytic copper foil, ensuring the synchronicity of the drying of the copper foil surface and effectively avoiding appearance abnormalities caused by slow local drying speed.
[0017] Furthermore, it also includes a squeezing roller, which cooperates with the first drive roller to squeeze the electrolytic copper foil on the first drive roller.
[0018] The beneficial effect of adopting the above-mentioned further technical solution is that: the electrolytic copper foil is squeezed out by the squeezing roller and the first transmission roller, which is conducive to the subsequent air drying and baking treatment of the electrolytic copper foil.
[0019] Compared with the prior art, the present invention has the following technical effects:
[0020] (1) The electrolytic copper foil drying device provided by this utility model, during the operation of the electrolytic copper foil, after being squeezed by the squeezing roller and the first transmission roller, is successively dried by the first air knife, the second air knife and the oven. The first air knife and the second air knife respectively air-dry the two sides of the electrolytic copper foil, and finally the oven achieves complete drying of the electrolytic copper foil. The air knife is used to dry the two sides of the electrolytic copper foil in advance. The temperature of the air knife and the oven can be selected below 200℃, which effectively avoids the problem of the coupling agent denaturing and failing due to long-term high-temperature baking.
[0021] (2) The air outlets of the first air knife and the second air knife are extended along the width direction of the electrolytic copper foil to achieve uniform drying in the width direction of the electrolytic copper foil and effectively avoid appearance abnormalities caused by slow local drying speed.
[0022] (3) The air outlet of the air knife is aligned with the electrolytic copper foil on the transmission roller. Under the support of the transmission roller, the air knife and the transmission roller work together to complete the air drying treatment of the surface of the electrolytic copper foil, effectively solving the problem of wrinkles caused by the copper foil shaking due to wind. Attached Figure Description
[0023] Figure 1 This diagram shows a schematic representation of the drying apparatus for electrolytic copper foil according to an embodiment of the present invention.
[0024] Figure label:
[0025] 1. Squeezing roller; 2. First drive roller; 3. Second drive roller; 4. First air knife; 5. Second air knife; 6. Drying oven; 7. Electrolytic copper foil. Detailed Implementation
[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0027] See Figure 1 A drying device for electrolytic copper foil includes a squeezing roller 1, a first drive roller 2, a second drive roller 3, a first air knife 4, a second air knife 5, and an oven 6. The first drive roller 2 and the second drive roller 3 support and drive the electrolytic copper foil 7 to move. The squeezing roller 1 cooperates with the first drive roller 2 to squeeze the electrolytic copper foil 7 on the first drive roller 2. The first drive roller 2, the second drive roller 3, and the oven 6 are arranged sequentially along the transmission direction of the electrolytic copper foil 7, and the height of the second drive roller 3 is lower than the height of the first drive roller 2. The first air knife 4 and the second air knife 5 are arranged sequentially along the transmission direction of the electrolytic copper foil 7. The air outlet of the first air knife 4 is aligned with the copper foil on the first drive roller 2, and the air outlet of the second air knife 5 is aligned with the copper foil on the second drive roller 3. The first air knife 4 and the second air knife 5 are respectively used to air dry the electrolytic copper foil 7 supported on the first drive roller 2 and the second drive roller 3. Specifically, the first drive roller 2 is used to support the pressing surface of the electrolytic copper foil 7, and the second drive roller 3 is used to support the non-pressing surface of the electrolytic copper foil 7. Figure 1 In the diagram, the side indicated by the upward arrow is the non-pressed surface, and the side indicated by the downward arrow is the pressed surface. The first air knife 4 is located on the non-pressed surface side of the electrolytic copper foil 7. The first air knife 4 and the first drive roller 2 are spaced apart and cooperate with each other. The first air knife 4 is used to air-dry the non-pressed surface of the electrolytic copper foil 7 supported on the first drive roller 2. The second air knife 5 is located on the pressed surface side of the electrolytic copper foil 7. The second air knife 5 and the second drive roller 3 are spaced apart and cooperate with each other. The second air knife 5 is used to air-dry the pressed surface of the electrolytic copper foil 7 supported on the second drive roller 3. Figure 1 In the image, the dashed arrow indicates the direction of airflow from the air knife.
[0028] The air outlet of the first air knife 4 is aligned with the non-pressed surface of the electrolytic copper foil 7, and the air outlet of the first air knife 4 extends along the width direction of the electrolytic copper foil 7. The air outlet of the second air knife 5 is aligned with the pressed surface of the electrolytic copper foil 7, and the air outlet of the second air knife 5 also extends along the width direction of the electrolytic copper foil 7.
[0029] The electrolytic copper foil drying device provided by this utility model involves the electrolytic copper foil being squeezed by the squeezing roller 1 and the first drive roller 2 during operation. A first air knife 4 then uniformly dries one side of the electrolytic copper foil 7, and a second air knife 5 uniformly dries the other side. Finally, the electrolytic copper foil 7 is completely dried in an oven 6. By using air knives to pre-dry both sides of the electrolytic copper foil, and by selecting temperatures below 200℃ for both the air knives and the oven, the problem of coupling agent denaturation and failure due to prolonged high-temperature baking can be effectively avoided.
[0030] The present invention provides a drying device for electrolytic copper foil. A first air knife 4 is located on the non-pressed side of the electrolytic copper foil 7, and a first drive roller 2 is located on the pressed side of the electrolytic copper foil 7. The air outlet of the first air knife 4 is aligned with the non-pressed side of the electrolytic copper foil 7 on the first drive roller 2. The first drive roller 2 serves as a support, and the first air knife 4 performs air drying on the non-pressed side of the electrolytic copper foil 7. A second air knife 5 is located on the pressed side of the electrolytic copper foil 7, and a second drive roller 3 is located on the non-pressed side of the electrolytic copper foil 7. The air outlet of the second air knife 5 is aligned with the pressed side of the electrolytic copper foil 7 on the second drive roller 3. The first drive roller 2 serves as a support, and the first air knife 4 performs air drying on the non-pressed side of the electrolytic copper foil 7. The first drive roller 2, acting as a support, cooperates with the first air knife 4, and the second drive roller 3, acting as a support, cooperates with the second air knife 5, effectively solving the problem of wrinkles caused by the copper foil shaking during the air drying process.
[0031] Meanwhile, the first air knife 4 and the second air knife 5 extend along the width direction of the electrolytic copper foil 7. The air knife uniformly dries the surface of the copper foil in the width direction, ensuring the synchronicity of the drying of the copper foil surface and effectively avoiding abnormal appearance problems caused by slow local drying speed.
[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A drying apparatus for electrolytic copper foil, characterized in that, The device includes a drive roller, an air knife, and an oven (6). The drive roller and the oven (6) are arranged sequentially along the drive direction of the electrolytic copper foil (7). There are at least two drive rollers, which are arranged sequentially along the drive direction of the electrolytic copper foil (7) to support and drive the electrolytic copper foil (7) to move. The number of air knives is the same as the number of drive rollers. Each air knife is arranged sequentially along the drive direction of the electrolytic copper foil (7) to air dry the electrolytic copper foil (7) supported on each drive roller.
2. The drying apparatus for electrolytic copper foil according to claim 1, wherein Each drive roller is not on the same horizontal plane, and two adjacent drive rollers are located on different sides of the electrolytic copper foil (7).
3. The drying apparatus for electrolytic copper foil according to claim 2, wherein The transmission rollers include a first transmission roller (2) and a second transmission roller (3). The first transmission roller (2) and the second transmission roller (3) are arranged sequentially along the transmission direction of the electrolytic copper foil (7). The second transmission roller (3) is located below the first transmission roller (2).
4. The drying apparatus for electrolytic copper foil according to claim 3, wherein The air knife includes a first air knife (4) and a second air knife (5). The first air knife (4) is used to air dry the electrolytic copper foil (7) on the first transmission roller (2), and the second air knife (5) is used to air dry the electrolytic copper foil (7) on the second transmission roller (3).
5. The drying apparatus for electrolytic copper foil according to claim 4, wherein The air outlet of the first air knife (4) is aligned with the side of the electrolytic copper foil (7) that is not in contact with the first drive roller (2), and the air outlet of the second air knife (5) is aligned with the side of the electrolytic copper foil (7) that is not in contact with the second drive roller (3).
6. The drying apparatus for electrolytic copper foil according to claim 5, wherein The air outlets of the first air knife (4) and the second air knife (5) are both extended along the width direction of the electrolytic copper foil (7).
7. The drying apparatus for electrolytic copper foil according to any one of claims 3 to 6, characterized in that, It also includes a squeezing roller (1), which cooperates with the first drive roller (2) to squeeze the electrolytic copper foil (7) on the first drive roller (2).