TWI445844B - Electrode for electrolysis - Google Patents

Description

Electrolytic electrode

The present invention relates to an electrode for electrolysis, and more particularly to an electrode for electrolysis for producing a metal foil such as an electrolytic copper foil by an electroplating method.

In the production of a metal foil by electroplating, in recent years, there has been a tendency for the electrolysis device to have a large current and an increase in size, and the electrode for electrolysis which is used as an insoluble electrode has been known to have a space-saving curved surface. know. For example, Patent Document 1 discloses a configuration in which an anode plate is attached to a casing by a bolt and bent in an arc shape, and the arc-shaped anode plate is rotatably disposed at intervals. On the circumference of the cylindrical cathode, a metal foil can be deposited on the surface of the cathode by interposing the electrolyte. Further, a contact ring is interposed between the anode plate and the casing, and the interval between the anode plate and the cathode can be adjusted by changing the thickness of the contact ring. In this way, the gap between the anode plate and the cathode can be kept constant to uniformize the current density, and the thickness of the deposited metal film can be made uniform.

However, in the configuration of Patent Document 1, the mounting of the anode plate toward the casing is performed by inserting the bolt from the opposite side of the casing from the anode plate, in order to change the thickness of the contact ring, because it is outside the casing. At the same time that the bolts must be attached and detached, and the anode plate must be attached and detached inside the casing, the work is complicated.

Therefore, in Patent Document 2, as shown in FIG. 4, the inner surface side (the opposite side to the cathode (not shown)) of the first electrode base 51 formed in an arc shape is interposed via the intermediate material 52, The arc-shaped second electrode base 54 is disposed, and the second electrode base 54 is fixed by bolts 55 from the inner surface side of the first electrode base 51 by bolts. As shown in FIG. 5, the second electrode base 54 is disposed on the inner circumferential surface of the first electrode base 51, and all of the second electrode bases 54 can be integrally supplied from the bus bar 56 via the first electrode base 51. According to Patent Document 2, when the thickness of the intermediate members 52 and 53 is adjusted, the replacement work of the intermediate members 52 and 53 can be performed only on the inner surface side of the first electrode base 51, and the workability can be improved.

However, there is a problem that the first electrode base 51 is individually adjusted to be spaced apart from the cathode, and remains on the work surface, and there is room for further improvement.

(previous technical literature)

(Patent Literature)

[Patent Document 1] Japanese Patent Publication No. 6-47758

[Patent Document 2] Japanese Patent Laid-Open No. Hei 8-209396

Therefore, the present invention has an object of providing an electrode for electrolysis which is easy to make the electrolytic current density uniform.

The object of the present invention is to provide a substrate for electrolysis for an anode in which a rotatable cathode is spaced apart from each other, comprising: a base body having an arcuate cross section; and a plurality of electrode plates disposed on the inner surface side of the base body It is configured to achieve an electrolysis electrode that can individually supply power to each of the electrode plates.

It is preferable that the electrode for electrolysis has an insulating elastomer interposed between the base body and the electrode plate.

Further, the electrode plate may be configured such that a hub protruding outwardly is inserted through the through hole of the base body, and the base body is held between the power supply plate via an insulating elastic body, and the outer surface side of the power supply plate is on the hub The head bolts the bolts and is fixed to the aforementioned base body.

According to the present invention, it is possible to provide an electrode for electrolysis which is easy to make the electrolysis current density uniform.

(to implement the form of the invention)

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a cross-sectional view showing an electrode for electrolysis according to an embodiment of the present invention, and showing a state of being used as an anode of the electrolytic cell.

As shown in Fig. 1, the electrode for electrolysis 1 is formed in a circular arc shape. In the present embodiment, the two electrolysis electrodes 1 and 1 are arranged in a semicircular shape and also serve as a groove wall of the electrolytic cell 2. The cylindrical cathodes 4 that can be driven to rotate on the inner side surfaces of the electrodes 1 for electrolysis are arranged at intervals along the circumferential direction. In the electrolytic cell 2, the electrolytic solution L can be supplied through the liquid supply portion 2a provided between the adjacent two electrolysis electrodes 1 and 1, and the supplied electrolytic solution L passes through the electrolysis electrode 1 in the direction indicated by the arrow. Between 1 and the cathode 4, the discharge grooves 2b and 2b provided on the left and right sides of the electrolytic cell 2 are discharged to the outside.

Fig. 2 is a cross-sectional view showing an enlarged main portion of the electrode 1 for electrolysis, and Fig. 3 is a cross-sectional view showing the enlarged portion of the electrode. As shown in Figs. 2 and 3, the electrode for electrolysis 1 is provided with a plurality of electrode plates 12 having the same arc shape in cross section on the inner side surface of the base body 10 having an arcuate cross section (the side facing the cathode 4 in Fig. 1). Composition. The electrode plate 12 is such that the hub 12a protruding outwardly is inserted through the through hole 10a of the base 10, and the base 10 is held between the electrode plate 12 and the power supply plate 16 by the outer side of the power supply plate 16 (Fig. 1) The opposite side of the cathode 4 is screwed to the head of the hub 12a to fix the electrode plate 12 to the base 10. The base 10 can be formed, for example, of a titanium plate, and the electrode plate 12 can be, for example, an insoluble electrode on the inner surface side of the titanium plate coated with ruthenium oxide or the like.

Insulating elastomers 20 and 22, such as a rubber material formed in a ring shape, are interposed between the electrode plate 12 and the base 10 and between the base 10 and the power supply plate 16.

Each of the electrode plates 12 is arranged in a line so as to cover the entire inner surface of the base 10, and a gap S for insulation is secured between the electrodes. Each of the electrode plates 12 is supplied with a current in a direction indicated by an arrow via a wiring 16a composed of a single-core electric wire connected to the power supply plate 16, and is configured to be individually powerable.

According to the electrode for electrolysis 1 having the above-described configuration, when the distance between the electrodes of the electrode plates 12 and the cathode 4 varies, and the current density is not uniform, the distance between the electrodes is not adjusted as shown in the prior art, but may be individually The current value supplied to each electrode plate 12 is adjusted. Specifically, when the distance between the electrodes measured is small, the supply current value is increased, and when the distance between the electrodes is large, the supply current value is made small, and the current density distribution of the cathode can be made uniform, and only By adjusting the value of the supply current, it is possible to easily make the thickness of the precipitated metal uniform. The distance between the electrodes and the value of the supply current are as described above. Since there is an inverse proportional relationship, it is easier to determine the shape of each electrode plate 12 by pre-tableting or digitizing the value of the supply current corresponding to the distance between the electrodes. Supply current value.

Further, in the state in which the insulating elastic body 20 is interposed between the base 10 and the electrode plate 12, since the electrode plate 12 is fixed to the base 10, it is possible to secure leakage prevention of the electrolytic solution L stored in the electrolytic cell 2, and to secure the substrate. Electrical insulation between 10 and electrode plate 12.

Furthermore, by interposing the elastomer 22 between the substrate 10 and the power supply board 16, stable power supply to the counter electrode plate 12 of the power supply board 16 can be achieved, and the current density can be surely controlled by adjusting the supply current value.

1. . . Electrolytic electrode

10. . . Matrix

10a. . . Through hole

12. . . Electrode plate

12a. . . Wheel hub

16. . . Power supply board

18. . . bolt

20, 22. . . Elastomer

Fig. 1 is a cross-sectional view showing an electrode for electrolysis according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view showing an enlarged main portion of the electrode for electrolysis shown in Fig. 1 .

Fig. 3 is a cross-sectional view showing the main part of the electrode for electrolysis shown in Fig. 1 in an enlarged manner.

Fig. 4 is a cross-sectional view of a principal part of a conventional electrolytic electrode.

Fig. 5 is a perspective view showing the overall configuration of an electrode for electrolysis shown in Fig. 4.

10. . . Matrix

12. . . Electrode plate

16. . . Power supply board

S. . . gap

Claims (1)

An electrode for electrolysis, which is an electrode for electrolysis used as an anode which is disposed at intervals with respect to a rotatable cathode, and is characterized in that: a base body having an arcuate cross section; and a plurality of electrode plates disposed on the inner surface side of the base body; An insulating elastic body is interposed between the base body and the electrode plate; and the electrode plate is configured such that a hub protruding outwardly is inserted into the through hole of the base body, and the base body is held by an insulating elastic body interposed between the power supply plate and the base plate. The base body is screwed to the head of the hub from the outer surface side of the power supply plate, and the electrode plates are provided between the electrode plates to ensure a gap for insulation. The individual power supply of the board is determined according to the relationship between the distance between the electrodes of the electrode plates and the cathode and the value of the supply current, and the power supply current value corresponding to the distance between the electrodes is pre-formed or digitized, and the automatic control is determined. The supply current value of each of the above electrode plates.