Anode assembly for manufacturing copper foil

Abstract

The invention proposes an anode assembly for manufacturing a copper foil, comprising: a substrate (2) having a concave arc-shaped cross-section corresponding to a cylindrical cathode; and a plurality of electrodes (4) which are fastened to the substrate by a plurality of fastening bolts (6) and are arranged in the circumferential direction. The plurality of electrodes are fastened to the substrate while maintaining a planar state without being deformed by the fastening pressure of the fastening bolts, so that the thickness of the electrodes can be adjusted to cope with a high current. The electrode can be an electrode with the thickness of 2-7 mm.

Description

Technical Field

[0001] The present invention relates to an anode constituting a manufacturing apparatus for manufacturing an electrolytic copper foil, and more particularly to an anode assembly for manufacturing a copper foil configured to be capable of handling a higher current for improving efficiency. Background Art

[0002] As an existing patent for manufacturing copper foil using electrolytic reaction, Korean Patent Publication No. 10-2019-0038325 can be cited. Figure 1 As shown, the apparatus for manufacturing an electrolytic copper foil includes an insoluble anode assembly 20 immersed in an electrolyte 12 in an electrolytic cell 10 and a rotating cylindrical cathode assembly 30 in a cylindrical shape.

[0003] The insoluble anode assembly 20 is disposed to face the cylindrical cathode assembly 30, and has a partially cylindrical shape having a concave shape in a manner along the outer shape of the cylindrical cathode assembly 30. When electricity is passed between such an insoluble anode assembly 20 and the cylindrical cathode assembly 30, a metal component can be grown on the surface of the cylindrical cathode assembly 30.

[0004] Therefore, when the cylindrical cathode assembly 30 is rotated relative to the gold plating electrode 20 in an energized state, copper foil is formed on the cylindrical cathode assembly 30 by electrolytic deposition. The copper foil formed in this way can be continuously obtained by peeling off the cylindrical cathode assembly 30. In addition, the front face of the anode assembly 20 corresponding to such a cathode assembly 30 can be said to be a portion for generating a substantial electrolytic reaction.

[0005] Such an anode assembly 20 generally includes an anode 22 arranged to correspond to a cathode assembly 30, and a substrate 24 supporting the anode 22 from behind. In addition, in order to fix the anodes by combining them with each other, non-fastening elements such as bolts are generally used. Here, if the anode assembly 20 is formed into a single continuous plate, it can be said to be the most preferred from the perspective of uniformity of current density, and the quality of the copper foil finally produced can be guaranteed. However, in reality, a plurality of the above-mentioned anodes 22 are configured, and are arranged to be fixed to the substrate 24 respectively.

[0006] In addition, as described above, the anode 22 should maintain the same spacing as the cylindrical cathode as a whole. Therefore, when the anode 22 is fixed to the titanium substrate 24, a plurality of bolts are used to attach the flat anode 22 to the concave substrate 24. That is, the flat electrode is made into a concave anode 22 having a radially concave surface and having the same spacing as the cathode.

[0007] However, in order to use the tightening force of the bolts to deform such a flat anode into a partially arcuate cross section, multiple bolts and a large tightening force generated by the multiple bolts are required. That is, for the existing anode, physical deformation occurs due to the bolts, resulting in residual stress in the anode, which is not preferred.

[0008] In addition, in order to deform the anode, the thickness of the anode itself can only be substantially limited. For example, the anode currently used generally has a thickness of about 1 mm. However, from the perspective of improving the efficiency of high current generation that has been widely adopted recently, such a thickness is not preferred in terms of improving efficiency. Summary of the invention

[0009] Technical issues

[0010] An object of the present invention is to provide an anode for electrolysis that is sufficiently thick and that achieves high productivity by increasing the current of the electrolytic reaction.

[0011] Another object of the present invention is to provide an anode for electrolysis that can be fixed to a substrate with a relatively low fastening force while preventing deformation caused by the fastening force of the anode.

[0012] Another object of the present invention is to provide an anode for electrolysis that uses a smaller number of bolts, thereby being advantageous in production process and capable of producing a product of excellent quality.

[0013] Technical Solution

[0014] The anode assembly for manufacturing copper foil of the present invention comprises: a substrate having a concave arc-shaped cross section corresponding to a cylindrical cathode; and a plurality of electrodes arranged circumferentially on the substrate. The electrodes are fastened to the substrate by fastening bolts. The plurality of electrodes are not deformed by the fastening pressure of the fastening bolts, but are supported on the substrate in a planar state, so that the thickness of the electrodes can be adjusted to cope with high current.

[0015] According to an embodiment, the fastening bolt may fasten the electrode to the substrate in a state of penetrating through a fastening hole formed in the electrode.

[0016] According to another embodiment, the stud bolt fixed to the substrate may be coupled to the fastening nut in a coupling groove on the back side of the substrate.

[0017] According to embodiments regarding the thickness of the electrode, the electrode may be in the range of 2 to 5 mm.

[0018] In addition, a flange portion having a shape corresponding to the bottom surface of the fastening bolt is formed around the fastening hole of the electrode through which the fastening bolt passes.

[0019] Effects of the Invention

[0020] According to the present invention having the above-mentioned structure, since the anode is assembled in a flat plate state that does not substantially deform, the thickness restriction of the electrode can be minimized. That is, it can be seen that by adopting the structure of the present invention, a thicker electrode, for example, an electrode with a thickness of 2 to 7 mm can be used. The ability to use such a thick electrode means that a high current can be handled, and thus it is expected that productivity can be substantially improved.

[0021] In addition, according to the present invention, it can be seen that the electrode is fixed to the substrate with a bolt tightening force that does not cause deformation of the electrode. Therefore, not only can it be easily assembled in the production process, but it is also expected that productivity will be improved accordingly. In addition, it can be seen that the number of fastening bolts required to fix the electrode to the substrate can be limited and reduced. This means that not only is it beneficial to the assembly process, but also by reducing the number of fastening bolts, the quality of the product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an example diagram of an electrolytic copper foil manufacturing device in existing patent documents.

[0023] Figure 2 FIG. 1 is a cross-sectional view of an anode assembly of the present invention.

[0024] Figure 3 This is an explanatory diagram for comparing the electrode arrangement of the present invention with a conventional arrangement.

[0025] Figure 4 FIG. 4 is a cross-sectional view of an anode assembly according to another embodiment of the present invention.

[0026] Figure 5 FIG. 4 is a cross-sectional view of an anode assembly according to another embodiment of the present invention.

[0027] Figure 6 yes Figure 5 An exemplary cross-sectional view of an electrode according to the illustrated embodiment. DETAILED DESCRIPTION

[0028] The present invention will be described in more detail below based on the embodiments shown in the drawings. In the present invention, the anode corresponds to the cylindrical cathode as described above, and such anode is formed to have a concave and partially cylindrical shape.

[0029] Figure 2 The anode assembly of the invention is shown in cross section, Figure 3 The conventional electrode and the electrode of the present invention are shown in the open state. As shown in the figure, the substrate 2 is formed into a concave arc shape with equal intervals as a whole corresponding to the cylindrical tube, and a plurality of electrodes 4 (anodes) attached to the concave surface of the substrate 2 are formed.

[0030] In the present invention, if Figure 3 As shown, a plurality of electrodes 4 (anodes) are attached in the circumferential direction, for example, 55 electrodes can be attached, which is significantly more than the existing number of electrodes 16. Here, the provision of significantly more electrodes 4 in the circumferential direction than the existing number means that the circumferential length of the electrodes is substantially shorter than that of the existing technology, so that the overall shape is close to a circular arc, and more contact portions with the substrate 2 can be ensured.

[0031] In addition, the thickness of the electrode 4 of the present invention is intended to be thicker than the conventional thickness (about 1 mm). When such a thick electrode 4 is used, a high current is used, which obviously greatly improves the productivity of the electrolytic copper foil.

[0032] When the thickness of the electrode 4 is increased in this way, the electrode 4 corresponding to the arc shape of the substrate 2 is difficult to deform. Here, when a plurality of electrodes 4 are fastened to the substrate 2 by fastening bolts, a large force is actually required to deform the circumferential cross section into an arc shape by the fastening force. When such a large force is applied to the electrode 4, the residual stress increases significantly, which not only makes the assembly process difficult, but also may cause various disadvantages in subsequent management.

[0033] Therefore, in the present invention, the basic concept is to fix the plurality of electrodes 4 to the substrate 2 while maintaining the flat plate shape. The ability to maintain the plurality of electrodes 4 in the flat plate shape means that substantially thicker electrodes 4 than conventional electrodes can be used, and thus high current can be used. In addition, while the electrode 4 is thick, the circumferential length is shortened, thereby increasing the number of electrodes.

[0034] The fact that a thicker electrode than the conventional one can be used is equivalent to the fact that a higher current can be used for the electrolytic reaction, which ultimately means that the productivity and efficiency of the electrolytic copper foil can be further improved. Sorting out the characteristics of the electrode 4 used in the anode assembly of the present invention, it can be said that by using a thicker electrode, it is possible to fully cope with the high current, and deformation due to the tightening force will not occur when attached to the substrate 4, thereby having the characteristics of improving assembly and high current.

[0035] Here, the fact that the shape is not deformed by the tightening force can also be said to have the advantage of substantially making the tightening force of the tightening bolt 6 the minimum tightening force required to fix the position of the electrode 4. Figure 3 To describe this feature, the lateral length of the electrode 4 (corresponding to the circumferential length of the cylindrical cathode) may not substantially change, but the longitudinal length of the electrode 4 (corresponding to the circumferential length of the cylindrical cathode) is significantly reduced compared to the prior art.

[0036] For example, if about 16 electrodes are used in the prior art, the electrode 4 of the present invention uses up to about 55 electrodes, which means that the circumferential length of the electrode 4 is significantly shorter. In addition, in order to use the fastening bolt 6, it is necessary to pre-form a fastening hole in the electrode 4, and to form a locking boss inside such a fastening hole to lock the head of the fastening bolt 6. Therefore, it is possible to prevent the head of the fastening bolt 6 from protruding from the electrode 4.

[0037] Figure 3 (a) shows the conventional electrode plate and bolt fastening holes, and (b) shows the electrode plate and bolt fastening holes of the present invention. Figure 3 It can be seen that according to the electrode assembly of the present invention, the number of fastening holes 5 used to fasten the electrode 4 to the substrate for fixing is significantly reduced. The significant reduction in the number of fastening holes 5 is equivalent to a significant reduction in the number of fastening bolts used for assembly.

[0038] by Figure 3 The fastening holes 5 are formed as a reference so as not to overlap in the vertical direction as much as possible. It can be said that this is to minimize the quality degradation that may occur in the product by overlapping the bolts in the vertical direction (rotation direction of the cathode). Each fastening hole formed in the plurality of electrodes 4 is formed at a position separated by a predetermined interval in the lateral direction (circumferential axis of the cathode) compared to the upper or lower part.

[0039] In addition, it can be seen that such an arrangement of fastening holes 5 is suitable for a specified number of electrode groups (for example, 7), and the arrangement of the fastening holes of the overall electrode 4 is completed by repeating a plurality of such electrode groups. Figure 3 The arrangement of the fastening holes 5 is overlapped in the longitudinal direction to cope with high currents to minimize production problems. Figure 3 Clearly compare the number of fastening holes and the degree of overlap in the longitudinal direction of (a) and (b).

[0040] As mentioned above, the electrode 4 of the present invention can maintain a flat shape without deforming the cross-sectional shape due to the tightening bolt 6. At the same time, in order to make the side or cross-sectional shape formed by the plurality of electrodes as close to an arc shape as possible, the number of electrodes 4 is increased. In addition, when the number of electrodes 4 increases, the contact portion between the electrode 4 and the substrate 2 naturally becomes wider.

[0041] Here, in the state of being fastened to the substrate 2, the electrode 4 still maintains a planar shape and can be said to be Figure 3 Or, based on the cylindrical cathode, only the upper end and the lower end of the electrode 4 are in contact with the substrate 2. This state can also be expressed as a state in which the middle portion of the electrode 4 is finely spaced from the substrate 2.

[0042] As described above, according to the present invention, when the electrode 4 is fastened to the substrate 2 by a plurality of fastening bolts 6, deformation due to the fastening pressure does not occur, and the assembly is performed while maintaining the flat plate shape. Therefore, it is expected that by increasing the thickness of the electrode 4, a high current supply and the resulting high efficiency can be achieved.

[0043] The inventors have experimentally confirmed that the thickness of the electrode 4 for high current is effective in the range of 1.5 mm to 7 mm, and have experimentally confirmed that the efficiency decreases at a thickness above this thickness. In addition, it has been confirmed that the thickness of the electrode 4 is more preferably 2 to 5 mm.

[0044] Below Figure 4 The present embodiment is described in detail with reference to the embodiment shown in FIG. The only difference between the present embodiment and the above-mentioned embodiment is the structure for fixing the electrode 14 to the substrate 12. It can be said that the structure of the electrode 14 is substantially the same. Figure 4 In the description of the embodiment, the description of the electrode 14 itself will be omitted, and only the structure for fixing the electrode 14 to the substrate 12 will be described.

[0045] Depend on Figure 4 It can be seen that the stud bolt 16 is fixed to the back side of the electrode 14 by welding. In addition, the substrate 12 has a through hole 15 through which the stud bolt 16 passes. The stud bolt 16 is coupled to the substrate 12 in a state of passing through the through hole 15. The stud bolt 16 has a length that does not protrude from the back side of the substrate 12, and as in the illustrated embodiment, does not protrude to the outside from the inside of the coupling groove 12a on the back side of the substrate 12.

[0046] In addition, inside the coupling groove 2a, the fastening nut 18 is threadedly coupled to the stud bolt 16. In this embodiment, as described above, the cross-sectional shape of the electrode 14 of the present invention is not deformed by the stud bolt 16, but remains in a planar shape. At the same time, in order to make the side or cross-sectional shape composed of the plurality of electrodes as close to an arc shape as possible, the number of electrodes 14 is increased.

[0047] In this embodiment, when the electrode 14 is fastened to the substrate 12 by a plurality of stud bolts 16, deformation due to the fastening pressure does not occur, and the assembly is performed while maintaining the flat plate shape. Thus, it is expected that by increasing the thickness of the electrode 14, a high current supply and the resulting improvement in productivity can be achieved.

[0048] Next, based on Figure 5 and Figure 6A preferred embodiment for fastening the electrode 4 to the substrate is described in more detail. A fastening hole 5 for passing the fastening bolt 6 is formed in the electrode 4, and a burring 3 is formed around the fastening hole 5. The burring 3 is made at the same time when the fastening hole 5 is formed by punching using a punch and a die, in order to fully widen the contact area with the fastening bolt 6.

[0049] The shape of the upper surface of the rim portion 3 corresponds to the shape of the bottom surface 6b of the head 6a of the fastening bolt 6. That is, when the head 6a of the fastening bolt 6 passes through the rim portion 3, the bottom surface 6b of the head 6a is attached to the upper surface of the rim portion 3. Therefore, the upper surface of the rim portion 3 and the area corresponding to the bottom surface 6b of the head 6a are in contact with each other and current is passed. It can be seen that the contact area between the rim portion 3 and the fastening bolt 6 is fully ensured, so that a high current can flow through such an area.

[0050] Furthermore, when the electrode is fastened to the substrate by the fastening bolt 6, if the flange portion 3 interferes with the substrate 4, it is preferable to form a groove in the entire periphery of the fastening hole for fastening the fastening bolt 6 in the substrate 4.

[0051] As described above, according to the present invention, the electrode 2 can be made sufficiently thick by making the bolt 6 fastened to the substrate 4 have only a fastening force to a degree that does not cause deformation of the electrode. In addition, it can be said that the high current is stably flowed between the electrode 2 and the bolt 6 by the burr portion 3. Such an aspect makes it possible to fully cope with the trend of high current for improving productivity. Here, it is obvious that the lower part of the threaded portion 6d of the bolt 6 is connected to the substrate 2.

[0052] Within the scope of the basic technical concept of the present invention as described above, various modifications can be made by those skilled in the art. In addition, it can be said that the protection scope of the present invention should be interpreted based on the description of the claims according to the gist of the provisions of the Patent Law.

Claims

1. An anode assembly for manufacturing copper foil, characterized in that: include: a substrate having a concave arc-shaped cross section corresponding to the cylindrical cathode; A plurality of electrodes are arranged on the substrate along a circumferential direction; as well as A fastening mechanism for fastening the electrode to a substrate; The plurality of electrodes are supported on the substrate while maintaining a planar state without being deformed by the fastening pressure of the fastening mechanism, so that a higher current can be handled by adjusting the thickness of the electrodes.

2. The anode assembly for manufacturing copper foil according to claim 1, characterized in that: The fastening mechanism is composed of a fastening bolt that fastens the electrode to the substrate in a state of penetrating a fastening hole formed in the electrode.

3. The anode assembly for manufacturing copper foil according to claim 1, characterized in that: The fastening mechanism comprises: a stud bolt fixed to the back side of the substrate by welding; and A fastening nut is engaged with a stud bolt passing through the substrate in a coupling groove on the back side of the substrate.

4. The anode assembly for manufacturing copper foil according to claim 1, characterized in that: The thickness of the electrode is in the range of 2 to 5 mm.

5. The anode assembly for manufacturing copper foil according to claim 2, characterized in that: A burred portion having a shape corresponding to a bottom surface of a fastening bolt is formed around the through hole.

Images