WO2010067754A1

WO2010067754A1 - Electrolytic electrode

Info

Publication number: WO2010067754A1
Application number: PCT/JP2009/070340
Authority: WO
Inventors: 輝樹高安
Original assignee: 株式会社昭和
Priority date: 2008-12-08
Filing date: 2009-12-03
Publication date: 2010-06-17
Also published as: CN102239281B; TWI445844B; TW201035381A; JP2010132993A; JP5414257B2; CN102239281A

Abstract

Provided is an electrolytic electrode used as an anode arranged at a distance from a rotatable cathode. The electrolytic electrode includes a base (10) having an arc-shaped cross section and a plurality of electrode plates (12) arranged on the inner surface of the base (10). The electrolytic electrode is configured so that power can be supplied separately to each of the electrode plates (12). With this configuration, the electrolytic electrode can easily obtain a uniform electrolytic current density.

Description

Electrode for electrolysis

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

In the production of metal foil by electroplating, in recent years, electrolysis devices have a tendency to increase in current and size, and as an electrode for electrolysis used as an insoluble anode, a curved surface that can save space is conventionally used. Are known. For example, Patent Document 1 discloses a configuration in which an anode plate is attached to a shell with a bolt and bent to form an arc, and the arc-shaped anode plate is disposed around a rotatable cylindrical cathode. A metal foil can be deposited on the surface of the cathode by arranging the electrodes at an interval and interposing an electrolytic solution. In addition, a contact ring is interposed between the anode plate and the shell, and the distance between the anode plate and the cathode can be adjusted by changing the thickness of the contact ring. Thereby, the space | interval of an anode plate and a cathode can be kept constant over the whole, the current density is made uniform, and the thickness of the metal thin film to precipitate is equalized.

However, in the configuration of Patent Document 1, since the anode plate is attached to the shell body by inserting a bolt from the opposite side of the anode plate to the shell body, the thickness of the contact ring is changed. However, there is a problem that the bolts are attached and detached outside the shell and the anode plate is attached and detached inside the shell, which makes the work complicated.

For this reason, in Patent Document 2, as shown in FIG. 4,

intermediate materials

52 and 53 are provided on the inner surface side (side facing a cathode not shown) of the first electrode base 51 formed in an arc shape. An arcuate second electrode base 54 is disposed, and the second electrode base 54 is fixed with bolts 55 from the inner surface side of the first electrode base 51. As shown in FIG. 5, a large number of second electrode bases 54 are arranged on the inner peripheral surface of the first electrode base 51, and all the second electrode bases 54 pass through the first electrode bases 51 from the bus bars 56. Can be energized integrally. According to the configuration of Patent Document 2, when the thickness adjustment of the

intermediate members

52 and 53 is performed, 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 workability is improved. Improvements are being made.

However, individually adjusting the distance between the first electrode base 51 and the cathode remains a problem in terms of work, and there is room for further improvement in this respect.

Japanese Patent Publication No. 6-47758 JP-A-8-209396

Therefore, an object of the present invention is to provide an electrode for electrolysis that facilitates uniformization of the electrolysis current density.

The object of the present invention is an electrode for electrolysis used as an anode arranged at a distance from a rotatable cathode, wherein the substrate has an arcuate cross section and a plurality of electrodes arranged on the inner surface side of the substrate. This is achieved by an electrode for electrolysis comprising an electrode plate and configured to be able to supply power to each electrode plate individually.

In this electrode for electrolysis, it is preferable that an insulating elastic body is interposed between the substrate and the electrode plate.

The electrode plate has an outwardly protruding boss inserted through the through-hole of the base, sandwiching the base via an insulating elastic body between the power supply and the outer surface of the power supply By screwing a bolt into the head of the boss from the side, it can be configured to be fixed to the base.

According to the present invention, it is possible to provide an electrode for electrolysis that facilitates uniformization of the electrolysis current density.

It is sectional drawing of the electrode for electrolysis which concerns on one Embodiment of this invention. It is sectional drawing which expands and shows the principal part of the electrode for electrolysis shown in FIG. It is sectional drawing which expands and shows the principal part of the electrode for electrolysis shown in FIG. It is principal part sectional drawing of the conventional electrode for electrolysis. It is a perspective view which shows the whole structure of the electrode for electrolysis shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of an electrode for electrolysis according to an embodiment of the present invention, and shows a case where it is used as an anode of an electrolytic cell.

As shown in FIG. 1, the electrode 1 for electrolysis is formed in the circular arc shape of the cross section, and in this embodiment, the two electrodes 1 for electrolysis 1 and 1 are arrange | positioned in semicircle shape, and the tank wall of the electrolysis tank 2 Doubles as On the inner surface side of the electrolysis electrodes 1, 1, a drum-like cathode 4 that can be driven to rotate is disposed at an interval so that the gap is substantially constant along the circumferential direction. An electrolytic solution L can be supplied to the electrolytic cell 2 via a liquid supply part 2a provided between two adjacent electrodes for electrolysis 1 and 1, and the supplied electrolytic solution L is indicated by an arrow. Are passed between the electrolysis electrodes 1, 1 and the cathode 4, and are discharged to the outside from the

discharge grooves

2 b, 2 b provided on the left and right sides of the electrolytic cell 2.

FIG. 2 is a cross-sectional view showing an enlarged main part of the electrode 1 for electrolysis, and FIG. 3 is a cross-sectional view showing this further enlarged. As shown in FIGS. 2 and 3, the electrode 1 for electrolysis has a plurality of electrode plates 12 each having an arcuate section on the inner surface side (side facing the cathode 4 in FIG. 1) of the substrate 10 having an arcuate section. Configured. In the electrode plate 12, a boss 12 a protruding outward is inserted into the through hole 10 a of the base 10, the base 10 is sandwiched between the electrode plate 12 and the power supply plate 16, and the outer surface side of the power supply plate 16 ( The electrode plate 12 is fixed to the base body 10 by screwing bolts 18 into the heads of the bosses 12a from the side opposite to the cathode 4 in FIG. The substrate 10 can be composed of, for example, a titanium plate, and the electrode plate 12 can be an insoluble electrode in which, for example, the inner surface side of the titanium plate is coated with iridium oxide or the like.

Between the electrode plate 12 and the base 10 and between the base 10 and the power supply plate 16, there are interposed

elastic bodies

20 and 22 having an insulating property such as a rubber material formed in a ring shape.

The electrode plates 12 are arranged and arranged so as to cover the entire inner surface of the substrate 10, and a gap S for insulation is secured between them. A current can be supplied to each electrode plate 12 in the direction of the arrow through a wiring 16a made of a single-core electric wire connected to the power supply plate 16, and each electrode plate 12 is configured to be able to supply power individually.

According to the electrode 1 for electrolysis having the above-described structure, when there is a possibility that the distance between the electrodes 12 and the cathode 4 varies and the current density becomes uneven, the distance between the electrodes is reduced as in the conventional case. Rather than adjusting, the current value supplied to each electrode plate 12 can be adjusted individually. Specifically, the current density distribution of the cathode can be made uniform by increasing the power supply current value when the measured distance between the electrodes is small, and decreasing the power supply current value when the distance between the electrodes is large. The thickness of the deposited metal can be easily uniformed only by adjusting the current value. Since the distance between the electrodes and the feeding current value are in an inversely proportional relationship as described above, the feeding current value for each electrode plate 12 can be obtained by previously tabulating or formulating the feeding current value corresponding to the distance between the electrodes. Can be more easily determined.

Further, since the electrode plate 12 is fixed to the base body 10 with the insulating elastic body 20 interposed between the base body 10 and the electrode plate 12, leakage of the electrolytic solution L stored in the electrolytic cell 2 As well as electrical insulation between the substrate 10 and the electrode plate 12 can be ensured.

Further, since the elastic body 22 is also interposed between the base 10 and the power supply plate 16, stable power supply to the electrode plate 12 through the power supply plate 16 is possible, and current density is adjusted by adjusting the power supply current value. Can be reliably controlled.

DESCRIPTION OF SYMBOLS 1 Electrode for electrolysis 10 Base | substrate 10a Through-hole 12 Electrode plate 12a Boss 16 Feeding plate 18

Bolt

20, 22 Elastic body

Claims

An electrode for electrolysis used as an anode arranged at a distance from a rotatable cathode,
An electrode for electrolysis comprising a base having an arcuate cross section and a plurality of electrode plates disposed on the inner surface side of the base, and configured to be able to supply power to each of the electrode plates.
The electrode for electrolysis according to claim 1, wherein an insulating elastic body is interposed between the substrate and the electrode plate.
The electrode plate has an outwardly protruding boss inserted through the through hole of the base body, sandwiches the base body with an insulating elastic body between the electrode plate and the outer surface side of the power supply plate. The electrode for electrolysis of Claim 2 fixed to the said base | substrate by screwing a volt | bolt to the head of the said boss | hub.