Production device of electrolytic copper foil

Abstract

The utility model relates to the field of electrolytic copper foil, and discloses an electrolytic copper foil production device which comprises an electrolytic tank and a cathode roller, a flow dividing groove is formed in the electrolytic tank, a flow equalizing mechanism is arranged on the inner side of the electrolytic tank, the flow equalizing mechanism comprises a flow equalizing plate, a cavity is formed in the flow equalizing plate, and the cathode roller is arranged in the cavity. A liquid inlet is formed in the lower end of the flow equalizing plate, two rows of flow equalizing holes are formed in the upper end of the flow equalizing plate, and an arc-shaped partition plate is fixedly connected to the interior of the cavity. According to the utility model, the flow equalizing plate is arranged at the liquid feeding port, so that the stable liquid feeding flow velocity can be ensured by using the flow equalizing plate, and the controllable surface density of the electrolytic copper foil is ensured; meanwhile, the anode conductive copper bar of the equipment is designed in a sectional manner, so that uniform current distribution is ensured; and furthermore, through the design of additionally arranging the wringing rollers and adopting a self-weight type structure, the function of wringing water on the surfaces of the copper foils with different specifications is achieved by using wringing rollers with different angles and different weights to bear loads according to the production of the copper foils with different thicknesses.

Description

Technical Field

[0001] This utility model belongs to the field of electrolytic copper foil technology, specifically, it relates to a production apparatus for electrolytic copper foil. Background Technology

[0002] Electrolytic copper foil is a type of copper foil formed by electrolytic deposition on a cathode roller. It is a thin sheet of copper material and an indispensable basic material in the electronics industry, especially in the manufacture of printed circuit boards (PCBs). The production equipment for electrolytic copper foil mainly consists of a cathode roller, an anode tank, a liquid flow distribution device, a cathode roller drive device, a cathode roller conductive device, an anti-oxidation machine, a winding machine, an online polishing system, a tension control system, a servo control system, a PLC control system, and a communication system. The cathode roller is the key component in copper foil manufacturing. It is a rotating roller structure made of titanium, used in conjunction with the anode tank. During the electroplating process, it acts as the cathode, where copper ions from the electrolyte solution are deposited onto the surface of the cathode roller, forming a thin and uniform copper foil. In the electrolytic tank, the anode and cathode are separated by the electrolyte. Under the influence of the electric field, copper ions from the anode migrate towards the cathode, thus depositing on the cathode surface to form copper foil.

[0003] However, the existing electrolysis process has certain defects. Due to the uneven flow of acidic electrolyte in the electrolytic cell, the copper ions are unevenly distributed during the ionization process, resulting in local deviations in the surface density of the copper foil. It is difficult to meet the process requirements, and the phenomenon commonly known as "bubbly yarn" is common, causing the copper foil to be downgraded or directly scrapped. At the same time, after the electrolytic copper foil is formed, a small amount of electrolyte will adhere to the surface when it comes out of the water. If it is not removed in time, it will not only affect the quality of the copper foil, but also corrode the surrounding equipment. Furthermore, most of the existing anode conductive copper busbars are single-unit designs. When the cathode roller is far away from the anode conductive copper busbar, it will lead to uneven current distribution, thus affecting the production quality of the copper foil.

[0004] To address these issues, the inventors have developed a novel electrolytic copper foil production apparatus to resolve the aforementioned problems and defects. Utility Model Content

[0005] To address the aforementioned technical problems caused by uneven flow of acidic electrolyte in the electrolytic cell, the presence of a small amount of electrolyte adhering to the surface of the electrolytic copper foil after forming, and uneven current distribution due to the distance between the cathode roller and the anode conductive copper busbar, the basic concept of the technical solution adopted by this utility model is as follows:

[0006] An electrolytic copper foil production apparatus includes an electrolytic cell and a cathode roller. The electrolytic cell has a flow distribution groove inside and a flow equalization mechanism inside. The flow equalization mechanism includes a flow equalization plate with a cavity inside. The lower end of the flow equalization plate has a liquid inlet, and the upper end of the flow equalization plate has two rows of flow equalization holes. An arc-shaped partition is fixedly connected inside the cavity, positioned between the two rows of flow equalization holes. The lower end of the flow equalization plate penetrates the inner side of the electrolytic cell and is fixedly connected thereto. The flow distribution groove corresponds to and communicates with the liquid inlet at the lower end of the flow equalization plate.

[0007] In a preferred embodiment of the present invention, anode conductive copper busbars are evenly distributed on the inner wall of the electrolytic cell, the bottom of the anode conductive copper busbars are fixedly connected to the inner wall of the electrolytic cell, and the anode conductive copper busbars and the current equalization plate are interleaved.

[0008] In a preferred embodiment of this utility model, a fixing frame is fixedly connected to the upper outer edge of the electrolytic cell, a second shaft is movably sleeved on the upper end of the fixing frame, a support frame is fixedly sleeved on the shaft of the second shaft, a load box is fixedly connected to one outer end of the support frame, an installation groove is opened inside the load box, and a load block is sleeved and installed inside the installation groove.

[0009] In a preferred embodiment of this utility model, a first shaft is movably sleeved on one end of the inner side of the support frame, and a rotating plate is fixedly connected to both ends of the first shaft. A squeezing roller is movably installed on the inner side of the lower end of the rotating plate. The squeezing roller corresponds to the surface of the cathode roller and is connected to it in a hybrid manner.

[0010] In a preferred embodiment of this utility model, a connecting member is movably connected to the upper end of the rotating plate, a spring is fixedly connected to the connecting member, a fixing plate is fixedly connected to the other end of the spring, and the lower end of the fixing plate is fixedly connected to the support frame.

[0011] In a preferred embodiment of this utility model, a motor frame is fixedly connected to the inner side of the cathode roller, and a brushless geared motor assembly is fixedly installed at one end of the inner side of the motor frame. A fixed shaft is fixedly connected to the transmission shaft of the brushless geared motor assembly. The fixed shaft passes through the center of both ends of the cathode roller and is sealed to it. The outer ends of the fixed shaft are fixedly connected to the upper end of the electrolytic cell.

[0012] In a preferred embodiment of this utility model, a liquid pump is fixedly installed at the lower end of the electrolytic cell, an inlet pipe is fixedly installed at the inlet end of the liquid pump, the other end of the inlet pipe penetrates the outer wall of the electrolytic cell and is sealed thereto, and an outlet pipe is fixedly installed at the outlet end of the liquid pump, the outlet pipe penetrates the bottom of the electrolytic cell and is connected to the diversion tank.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] This invention features a flow equalization plate at the liquid inlet, which ensures a relatively stable liquid flow rate and thus controls the areal density of the electrolytic copper foil. Simultaneously, the anode conductive copper busbar is designed in segments, with the busbars extending from both sides to ensure uniform current distribution. Furthermore, the addition of a dewatering roller with a self-weight structure allows for the use of rollers of varying angles and weights to dewater copper foils of different thicknesses, achieving the function of squeezing out moisture from the foil surface according to different specifications.

[0015] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0016] In the attached diagram:

[0017] Figure 1 A three-dimensional front view schematic diagram of a production apparatus for electrolytic copper foil;

[0018] Figure 2 A schematic cross-sectional view of an electrolytic cell in a copper foil production apparatus.

[0019] Figure 3 A schematic cross-sectional view of the cathode roller in an electrolytic copper foil production apparatus;

[0020] Figure 4 A bottom view of the bottom of the electrolytic cell in an electrolytic copper foil production apparatus;

[0021] Figure 5 A schematic diagram showing the disassembly of the dewatering mechanism of an electrolytic copper foil production device under load;

[0022] Figure 6 This is an enlarged schematic diagram of the flow equalization plate section of an electrolytic copper foil production apparatus.

[0023] Figure 7 This is a schematic diagram of the longitudinal section of the flow equalization plate in an electrolytic copper foil production apparatus.

[0024] In the diagram: 1. Electrolytic cell; 2. Cathode roller; 3. First shaft; 4. Spring; 5. Fixing plate; 6. Support frame; 7. Weight block; 8. Second shaft; 9. Weight box; 10. Fixing frame; 11. Rotating plate; 12. Anode conductive copper busbar; 13. Flow equalization plate; 14. Flow divider; 15. Motor frame; 16. Brushless geared motor assembly; 17. Fixing shaft; 18. Liquid pump; 19. Inlet pipe; 20. Outlet pipe; 21. Mounting groove; 22. Squeezing roller; 23. Connector; 24. Flow equalization hole; 25. Arc-shaped partition; 26. Cavity; 27. Inlet. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0026] like Figures 1 to 7 As shown, an electrolytic copper foil production apparatus includes an electrolytic cell 1 and a cathode roller 2. The electrolytic cell 1 has a flow distribution groove 14 inside and a flow equalization mechanism is provided inside the electrolytic cell 1. The flow equalization mechanism includes a flow equalization plate 13, a cavity 26 inside the flow equalization plate 13, a liquid inlet 27 at the lower end of the flow equalization plate 13, and two rows of flow equalization holes 24 at the upper end of the flow equalization plate 13. An arc-shaped partition 25 is fixedly connected inside the cavity 26 and is disposed between the two rows of flow equalization holes 24. The lower end of the flow equalization plate 13 penetrates the inner side of the electrolytic cell 1 and is fixedly connected thereto. The flow distribution groove 14 corresponds to and communicates with the liquid inlet 27 at the lower end of the flow equalization plate 13.

[0027] In this design, a flow equalization plate 13 is installed at the liquid inlet. This plate ensures a relatively stable liquid flow rate, thereby controlling the areal density of the electrolytic copper foil. The flow equalization plate 13 has two rows of 300 Φ8 holes to transform the liquid flow from turbulent to laminar. The two rows of holes are at a 55° angle to prevent the liquid flow from impacting the cathode roller 2 surface. An arc-shaped baffle 25 inside the flow equalization plate 13 ensures the liquid flow is smoothly distributed to the holes on both sides. The tolerance of the electronic circuit foil can be controlled within 5.0. The tolerance of the lithium battery copper foil is controlled within 1.0.

[0028] like Figures 1 to 7 As shown, in a specific embodiment, anode conductive copper busbars 12 are evenly distributed on the inner wall of the electrolytic cell 1. The bottom of the anode conductive copper busbars 12 is fixedly connected to the inner wall of the electrolytic cell 1, and the anode conductive copper busbars 12 and the current equalization plate 13 are interleaved.

[0029] In this setup, the anode conductive copper busbar 12 of this device is designed in a segmented manner, and the electrolyte in the current equalization plate 13 is led from both sides to the anode conductive copper busbar 12 to ensure uniform current distribution.

[0030] like Figures 1 to 7As shown, in a specific embodiment, a fixed frame 10 is fixedly connected to the upper outer edge of the electrolytic cell 1. A second shaft 8 is movably sleeved on the upper end of the fixed frame 10. A support frame 6 is fixedly sleeved on the shaft of the second shaft 8. A load box 9 is fixedly connected to one outer end of the support frame 6. An installation groove 21 is opened inside the load box 9, and a load block 7 is sleeved inside the installation groove 21. A first shaft 3 is movably sleeved on one inner end of the support frame 6. A rotating plate 11 is fixedly connected to both ends of the first shaft 3. A squeezing roller 22 is movably installed on the inner side of the lower end of the rotating plate 11. The squeezing roller 22 corresponds to the surface of the cathode roller 2 and is connected to it. A connecting piece 23 is movably connected to the upper end of the rotating plate 11. A spring 4 is fixedly connected to the connecting piece 23. A fixed plate 5 is fixedly connected to the other end of the spring 4. The lower end of the fixed plate 5 is fixedly connected to the support frame 6.

[0031] In this design, by adding a dewatering roller 22 and adopting a self-weight structure, different angles and weights of the dewatering roller 22 are used to load copper foil of different thicknesses, thereby achieving the function of dewatering the surface of copper foil of different specifications.

[0032] like Figures 1 to 7 As shown, in a specific embodiment, a motor frame 15 is fixedly connected to the inner side of the cathode roller 2, and a brushless geared motor assembly 16 is fixedly installed at one end of the inner side of the motor frame 15. A fixed shaft 17 is fixedly connected to the transmission shaft of the brushless geared motor assembly 16. The fixed shaft 17 passes through the center of both ends of the cathode roller 2 and is sealed to it. The outer ends of the fixed shaft 17 are fixedly connected to the upper end of the electrolytic cell 1.

[0033] In this configuration, the brushless geared motor 16 reduces the motor speed and increases the torque of the cathode roller, while also increasing the speed stability of the cathode roller 2.

[0034] like Figures 1 to 7 As shown, in a specific embodiment, a liquid pump 18 is fixedly installed at the lower end of the electrolytic cell 1. An inlet pipe 19 is fixedly installed at the inlet end of the liquid pump 18. The other end of the inlet pipe 19 penetrates the outer wall of the electrolytic cell 1 and is sealed to it. An outlet pipe 20 is fixedly installed at the outlet end of the liquid pump 18. The outlet pipe 20 penetrates the bottom of the electrolytic cell 1 and is connected to the diversion tank 14.

[0035] In this setup, the function of the liquid pump 18 is to induce the electrolyte inside the electrolytic cell 1 to flow at a uniform speed, making the electrolysis process more uniform and efficient.

[0036] The implementation principle of an electrolytic copper foil production apparatus in this embodiment is as follows:

[0037] This invention features a flow equalization plate 13 at the liquid inlet. This plate ensures a relatively stable liquid flow rate, thereby guaranteeing controllable areal density of the electrolytic copper foil. The flow equalization plate 13 has two rows of 300 Φ8 holes to transform the liquid flow from turbulent to laminar. The two rows of holes are at a 55° angle to prevent the liquid flow from impacting the cathode roller 2 surface. An arc-shaped baffle 25 inside the flow equalization plate 13 ensures the liquid flow is smoothly distributed to the holes on both sides. The polarity of the electronic circuit foil can be controlled within 5.0. The tolerance of the lithium battery copper foil is controlled within 1.0. Meanwhile, the anode conductive copper busbar 12 of this equipment is designed in a segmented manner, and the electrolyte in the current equalization plate 13 is led from both sides to the anode conductive copper busbar 12 to ensure uniform current distribution. Furthermore, by adding a water-squeezing roller 22 and adopting a self-weight structure, the water-squeezing roller 22 with different angles and different weights is used to load copper foil of different thicknesses, so as to achieve the function of squeezing out the moisture on the foil surface according to different specifications of copper foil.

Claims

1. A production apparatus for electrolytic copper foil, comprising an electrolytic cell (1) and a cathode roller (2), characterized in that: The electrolytic cell (1) has a flow distribution groove (14) inside. The electrolytic cell (1) has a flow equalization mechanism inside. The flow equalization mechanism includes a flow equalization plate (13). The flow equalization plate (13) has a cavity (26) inside. The lower end of the flow equalization plate (13) has a liquid inlet (27) and the upper end of the flow equalization plate (13) has two rows of flow equalization holes (24). An arc-shaped partition (25) is fixedly connected inside the cavity (26). The arc-shaped partition (25) is located between the two rows of flow equalization holes (24). The lower end of the flow equalization plate (13) penetrates the inner side of the electrolytic cell (1) and is fixedly connected to it. The flow distribution groove (14) corresponds to the liquid inlet (27) at the lower end of the flow equalization plate (13) and is connected to it.

2. The electrolytic copper foil production apparatus according to claim 1, characterized in that, The inner wall of the electrolytic cell (1) is uniformly distributed with anode conductive copper busbars (12). The bottom of the anode conductive copper busbars (12) is fixedly connected to the inner wall of the electrolytic cell (1), and the anode conductive copper busbars (12) and the current equalization plate (13) are interleaved.

3. The electrolytic copper foil production apparatus according to claim 2, characterized in that, The upper outer edge of the electrolytic cell (1) is fixedly connected to a fixing frame (10), and the upper end of the fixing frame (10) is movably sleeved with a second shaft (8). A support frame (6) is fixedly sleeved on the shaft of the second shaft (8). A load box (9) is fixedly connected to one side of the support frame (6). An installation groove (21) is opened inside the load box (9), and a load block (7) is sleeved inside the installation groove (21).

4. The electrolytic copper foil production apparatus according to claim 3, characterized in that, The support frame (6) has a first shaft (3) movably sleeved on one end of its inner side. Both ends of the first shaft (3) are fixedly connected to a rotating plate (11). A squeezing roller (22) is movably installed on the inner side of the lower end of the rotating plate (11). The squeezing roller (22) corresponds to the surface of the cathode roller (2) and is connected to it in a hybrid manner.

5. The electrolytic copper foil production apparatus according to claim 4, characterized in that, The upper end of the rotating plate (11) is movably connected to a connector (23), a spring (4) is fixedly connected to the connector (23), the other end of the spring (4) is fixedly connected to a fixing plate (5), and the lower end of the fixing plate (5) is fixedly connected to a support frame (6).

6. The electrolytic copper foil production apparatus according to claim 4, characterized in that, A motor frame (15) is fixedly connected to the inner side of the cathode roller (2). A brushless geared motor assembly (16) is fixedly installed at one end of the inner side of the motor frame (15). A fixed shaft (17) is fixedly connected to the transmission shaft of the brushless geared motor assembly (16). The fixed shaft (17) passes through the center of both ends of the cathode roller (2) and is sealed to it. The two outer ends of the fixed shaft (17) are fixedly connected to the upper end of the electrolytic cell (1).

7. The electrolytic copper foil production apparatus according to claim 6, characterized in that, A liquid pump (18) is fixedly installed at the lower end of the electrolytic cell (1). An inlet pipe (19) is fixedly installed at the inlet end of the liquid pump (18). The other end of the inlet pipe (19) penetrates the outer wall of the electrolytic cell (1) and is sealed to it. An outlet pipe (20) is fixedly installed at the outlet end of the liquid pump (18). The outlet pipe (20) penetrates the bottom of the electrolytic cell (1) and is connected to the diversion tank (14).

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