JPS6123797A - Electrode body in electrolytic apparatus - Google Patents

Abstract

PURPOSE:To perform uniform coating treatment for the material to be treated by providing block-shaped electrodes made of insoluble material which are finely divided into many pieces in accordance with the surfaces of the material to be treated, performing suitably different electric conduction to be respective electrodes and simultaneously performing electrolysis. CONSTITUTION:The respective block-shaped electrodes 1a-5d finely divided are electrically insulated by the auxiliary members 6 independently and fitted tightly with a main body 8 to be opposed to the material 10 to be treated. Electricity is supplied to the material 10 immersed into an electrolyte 12 via a wiring 9 from the electric sources R1, R2 and conducted to respective elecrodes 1a-5d of each electrode body A, B via a lead wire 7 to perform coating treatment. In this time, low electrical voltage and current density are charged to the electrodes 1a-1d of the uppermost step, the electrodes 2a, 2d, 3a, 3d, 4a, 4d of both sides of middlie step and the electrodes 5a-5d of the lowermost step and high electrical voltage and current density are charged to the other electrodes 2b, 2c, 3b, 3c, 4b, 4c provided to the central part and simultaneously the electrolytic treatment is performed. Thereby, the uniform coating treatment is performed on the central part and the peripheral parts of the material 10 to be treated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrode body for electrolytic treatment used in an electrolytic ellipse in an electrolytic device.

2. Prior Art The electrodes in the electrolytic cell in conventional electrolyzers are all integrated and work as electrodes, and the basic structure of an electrolyzer using all of the conventional electrolyzers is shown in Figure 7. . In other words, the requirements for basic to main fishing regarding the shape and electrolytic conditions of the object to be treated (i o' c i' is the electrode, 11' is the electrolytic tank, 12' is the electrolytic solution, and R' is the power source) are as follows: surface treatment on the treated object 10', such as plating coating treatment, anodic oxidation coating treatment,
In the etching process, etc., it is desired that each part be treated uniformly and evenly in terms of the thickness of the treated film, the depth of the process, etc. However, it is not easy to remove the process unevenness.

For example, the front and back surfaces of the rectangular flat plate 10' shown in FIG. 7 are treated with anodic oxide coatings. Even when processing the flat plate 10' in the electrolytic bath 11' in a horizontal position or in a vertical position, the phenomenon differs. The bottom side is also affected by gas bubbles generated during electrolysis, so even if you apply electricity in the same way as the top side, the processing results will be affected. Unevenness occurs. Therefore, in such cases, it is common practice to perform electrolysis in a vertical position. However, even with this, there is a difference in the processing depth between the central part and the parts near the edges of the flat plate. That is, it is not easy to achieve uniformity between the upper and lower portions of the flat plate, and between the center and end portions in the width direction, even if the width of the counter electrode is adjusted.

The main cause of these phenomena is the concentration phenomenon of electricity that occurs during electrochemical processing, which results in areas on the surface of the object being treated where electricity tends to accumulate.
Differences in the hard-to-reach areas occur, leading to unevenness in the thickness of the treated film and other treatments.

As a countermeasure for this, the current common method is to use the auxiliary electrode 1'a'' (r) in the areas that are electrically difficult to reach, and to mask the areas where concentration is likely to occur either on the workpiece side or on the counter electrode side.
The unevenness is reduced by taking troublesome measures such as ``k placement''.

Problems to be Solved by the Invention The present invention addresses the above-mentioned basic phenomena and the lack of effectiveness in preventing processing unevenness caused by current countermeasures, and aims to provide an electrode body for an electrolytic device that reduces processing unevenness as much as possible. be.

Means for Solving the Problems In order to achieve all of the above objects, the present invention differs from conventional integrated electrodes in that it has a main body corresponding to the object to be treated (9 surface areas having electrical insulation and chemical resistance, etc.). A large number of block-shaped electrodes (made of insoluble material) arranged vertically and horizontally are fitted and fixed through tray auxiliary members (those that fully strengthen tight joints, etc.).In that case, each block-shaped electrode The front part is exposed to the electrolyte side, but each lead wire is connected to the back part separately, and these lead wire groups are pulled out of the electrolyte from the upper end of the main body, and each terminal part is connected to the electrolyte separately. connected to the power supply.

That is, in the present invention, the main body, a large number of block-shaped electrodes that are subdivided and arranged on the surface thereof and fitted and fixed with auxiliary members 7, and lead wires that are respectively connected to the back surface of each electrode. The entire electrode body has an integrated composite structure by combining and assembling the electrodes, and in order to independently supply power to each of the many subdivided block-shaped electrodes, it is necessary to set individual energizing conditions such as voltage or current density to each of the subdivided block-shaped electrodes. It is configured so that it can be added.

Embodiment 1 Embodiment 1 [See Figs. 1 to 3] Fig. 1 is a front view of Fig. 2 seen in the direction of the arrow ■, and Fig. 2 is a longitudinal cross-sectional side view of Fig. 1 seen in the direction of the arrow 2w. 3 are explanatory diagrams of an electrolysis device in which the electrode body of the present invention shown in FIG. 1 and FIG. 2 is disposed. In Fig. 3, 1o is the object to be treated, 11 is the electrolytic tank, 12 is the electrolytic solution, A,
B is the electrode body of the present invention. Since each electrode body A and B have the same structure, one electrode body A will be explained.

Reference numeral 8 denotes the main body, which is made of a material having electrical insulation properties and chemical resistance, and has an elongated box-like shape with an opening only at the upper end. Ula~5a, 1b~5 on the surface of this main body 8
As shown by b, 1c to 5c, and 1d to 5d (20 pieces), block-shaped electrodes are arranged in subdivisions in the vertical and horizontal directions and are fitted and fixed. That is, a through hole is provided on the surface of the main body 80 for fitting and fixing each of the 20 subdivided block-shaped electrodes 1a to 5dk, and the entire front surface of each electrode 1a to 5d is exposed to the electrolyte side in each through hole. An auxiliary member 6 (for example, a soft resin material) is inserted between each through hole and the outer periphery of the side surface of each electrode to strengthen the tight bond between the two and completely prevent the electrolyte 12 from seeping into the main body 8. [Or a material with adhesiveness or elasticity such as banking of rubber material or adhesive] Each electrode 1a to 5d is
k are individually electrically insulated and firmly fitted into the main body 8.

One end of the conductive glue-F wire 7 is firmly connected to the back side of each of the block-shaped electrodes 1a to 5d (located inside the main body 8), and these lead wire groups are attached to the upper end of the main body. It is led out from the opening (this part is located above the surface of the electrolytic solution during electrolysis [and is not affected by the electrolytic solution 12, etc.]), and each terminal end is connected to one of the electrolytic power sources separately.

Furthermore, the block-shaped electrodes 1a to 5d of the other electrode body B, which corresponds to the object to be processed 10 and is arranged on the left side thereof, are located at positions corresponding to the block-shaped electrodes 1a to 5d of the right side electrode body A, respectively, Each of them is connected to the other electrolytic power source R2 through separate lead wires 7 as described above, and the FJt power source control mechanism is shown, for example, by linking a sequencer or computer to each block from the power source R1. Electrolytic conditions (based on theoretical values or experimental values) for electrodes of
(voltage, current density, etc.) can be added.

That is, the workpiece 1 immersed in the electrolytic solution 12A in the electrolytic bath 11
0, when power is supplied through the wiring 9 from the common i of the electrolytic power source "l+" 2, and the block-shaped electrodes 1a to 5d arranged in the electrode bodies A and B arranged at the left and right positions are energized, the Both surfaces of the object to be treated 10 are subjected to electrolytic action according to individually given energization conditions at the facing portions of the winter block-shaped electrodes 1a to 5d.

For example, the uppermost block-shaped electrodes 1a and lb in FIG.

lc, ld and 2a 2d and 3a 3d and 4a on both sides of the middle row
4d and the lowermost block-shaped electrodes 5a and 5b.

A low voltage, current density, etc. are all added to 5c and 5d, and block-shaped electrodes 2b2c, 3b3c, and 4b4 corresponding to the center are added.
If a high voltage, current density, etc. are applied to c and the electrolytic treatment is performed at the same time, an even coating treatment can be obtained not only in the central portion but also in the peripheral portion of the object 10 to be treated.

Furthermore, is the voltage, current density, etc. applied to each counter electrode block-shaped electrode 1a to 5d? If the conditions for the individual power supplies RI and R2 to be supplied are determined by the power supply control mechanism E described earlier, the power supply conditions at each part can be given based on theoretical values or experimental values. Therefore, a great effect can be obtained in making the surface treatment uniform.

Furthermore, the main body into which each block-shaped electrode is completely fitted can be formed into an arbitrary overall shape by, for example, a box-shaped product made of a hard resin material such as PVO or FRP, or by semi-hard or soft molding or other molding methods.

Further, in the case shown in FIG. 3, for example, the workpiece 10
When processing items with different lengths (for example, items with lengths corresponding to the block-shaped electrodes 1a to 3d), change the counter electrode part to be energized and energize the other block-shaped electrodes 4a and 5a. By not allowing this, it is possible to eliminate waste due to extra power supply, prevent adverse effects on the objects to be processed, and ensure uniformity of processing corresponding to each object to be processed. If the entire electrode body of the present invention is prepared, which is larger in width and length than the width and length of the object to be processed, the need to apply electricity to some of the block-shaped electrodes can be omitted. In particular, changes in size of the shape of the object to be processed can be easily accommodated. This point also applies to the second to fourth embodiments shown below.

In the second embodiment (see Fig. 4), the case where the object to be treated 10 has an irregular shape (a curved body with unevenness) is shown in cross section, and the left surface of the object to be treated 10 is shown in the case where no electrolysis is performed (one side electrolysis). The electrode body of the present invention, which is placed on the right side of the object to be treated 10, has a main body 80 whose surface is bent into the same shape as the object to be treated as shown in the figure. This embodiment differs from the previous embodiment in that a large number of block-shaped electrodes in a row are fitted and fixed, and other parts have the same structure.

In the case of this embodiment, the electrical concentration phenomenon often occurs in the convex portions depending on the shapes of both the object 10 and the counter electrode, and the phenomenon that is difficult to reach occurs in the concave portions. Therefore, electricity is applied independently to each of the block-shaped electrodes arranged in the electrode body of the present invention placed on one side of the object to be treated 100 via separate lead wires 7 from the electrolytic power source, and an appropriate voltage is applied to each of them. By applying current density or the like to the EE machine, it is possible to obtain a uniform coating with less surface unevenness over the entire surface of the object to be treated.

Third embodiment (see Figure 5) In this embodiment, 11 is an electrolytic tank, 12 is an electrolytic solution, and 10
is the object to be processed (the object to be processed continuously in a long strip)
, 13, 14, and 1.5 are rollers, and the electrode bodies A and B of the present invention, which are composed of block-shaped electrodes arranged in one to five rows on the main body 8, are the same as in the first embodiment. In Although,
Another electrode body C is provided in the center of the electrode bodies A and B, corresponding to the introduction side and the extraction side of the object to be treated into the electrolytic solution 12. 1 back to back
You can think of it in the same way as something that has become physical. Therefore, although not shown, separate lead wires and separate power sources are provided for each electrode body A and BK, as in the previous embodiment, but in this embodiment, the center electrode body C It also has a separate lead wire and power supply similar to the above.

In this embodiment, as described above, the object to be processed 10 is a long strip and is continuously processed while moving sequentially in the direction of the arrow in the figure. Comparing the two ends, we find that electrical concentration occurs at the ends of both ears, and that there is a voltage drop phenomenon (due to the resistance of the treated material itself and the electrode material itself) depending on the amount of current applied between the upper and lower parts of the electrolytic cell. It is possible to cope with the phenomenon that causes a change in the processing effect by selecting the conditions for applying current to the block-shaped electrodes of each electrode assembly A, B, and 0.

Fourth Embodiment (See FIG. 6) FIG. 6 shows a case where the object to be treated 10 has an irregular mouth shape when viewed from above, and a uniform coating is applied to both the front and back surfaces of the object using the electrode body of the present invention. ≠It is a plan view of sliding passage 1α. A, B&-
j: electrode bodies of the present invention arranged corresponding to the mouth-shaped objects 10 to be treated, respectively. In one electrode body A, the center part of the main body 8a corresponds to the inner surface of the recess of the object to be processed 10, and is fitted with an appropriate distance therebetween. The entire surface of the central convex portion of the main body 8a relative to the workpiece 10 is provided with a large number of block-shaped blocks corresponding to both end faces of the object 10, as in the previous embodiment. The electrodes 1a to 1h are arranged vertically and horizontally in a stacked state and fitted and fixed 7, and each of the block-shaped electrodes on both sides 1cidli to 1n are arranged vertically and horizontally in the same manner as above. The lead wires, which are individually fixed to the back of the main body of all the block electrodes 11 to 10 to 1f to 1n, are connected to the electrolytic wires from the upper end of the main body 8 in the same way as in the previous embodiment. It is a matter of course that the liquid is guided so that the liquid does not seep through, and that each of them is individually connected to one power source as in the first embodiment.

The inner surface of the main body 8b of the other electrode body B has a shape corresponding to the outer surface of the object to be processed 10, and the blocks 2a to 2d and 2γ to 2μ are formed on the surface of both sides of the mouth-shaped object to be processed 10. shaped electrodes, and 2e for the corners.

2f, 2p, 2q, and 2g~ for the outer surface
2n are arranged in the vertical and horizontal directions similarly to the electrode body A, and are fitted and fixed, respectively. Each -1' line is taken out from each of these block-shaped electrodes 2a to 2tt rows, and these are connected to the other power source separately, as in the previous case.

For example, a high voltage or current density is applied to the inner surface and corner surfaces of the object to be processed 10 from the block-shaped electrodes 10 to 1f near the upper end of the central protrusion of one electrode body, and block-shaped electrodes on both sides are applied. A low voltage current density or the like is applied from the electrodes 11 to In to both end surfaces of the object to be processed 10, and
Block-shaped electrodes 2e and 2f at the inner corner of the other electrode body B
Also, from 2p and 2q, it is possible to obtain a uniform coating with low electric charge on the corners of the surface of the object to be treated.

Although not shown as an example, one set of electrode bodies of the present invention may be made to correspond to a plurality of objects to be treated, or a plurality of electrode bodies may be made to correspond to inverse VCi pieces of objects to be electrolyzed. It goes without saying that embodiments such as carrying out the treatment or supporting the electrode body itself with other auxiliary materials (electrode zaport, etc.) in the electrolytic cell can be arbitrarily selected as in the conventional case.

Regarding the material of the block-shaped electrode in this example,
Insoluble materials, including those with a low degree of dissolved M, are targeted for practical use.

Effects of the Invention In the present invention, (1) a surface area of the main body that has stain-drying properties and chemical resistance, etc., which are different from conventional integrated electrodes; The electrode body is constructed by fitting the divided and arranged block-shaped electrodes, and each of the block-shaped electrodes is energized independently, so that it is possible to individually apply energizing conditions such as arbitrary voltage or current density. For example, for the periphery of a square flat plate to be processed, block-shaped electrodes are fixed in parallel on the top and bottom stages of the electrode body of the present invention, and block-shaped electrodes are fixed in parallel on both ends of the intermediate stage. By applying low voltages, current densities, etc. to each of the electrodes, and applying high voltages, current densities, etc. to the block-shaped electrodes at the middle central part, the central part as well as the peripheral part of the object to be treated can be averaged. A film treatment is obtained.

(11) In addition, when the object to be processed has an irregular curved surface such as an uneven surface, the electrical concentration phenomenon is likely to occur on the convex portion of the object, but in this case, the same By applying arbitrary voltage and current density to each of the block-shaped electrodes arranged in multiple subdivisions fitted into the bent main body, uniformity of the entire coating can be obtained.

GiD Even when processing a long strip to be processed continuously, under normal processing conditions, electrical concentration occurs at both ends of the strip compared to the center, and the electrolytic cell A voltage drop phenomenon may occur depending on the amount of current applied between the upper and upper parts, which may affect the processing effect, but the present invention can adjust the current application conditions to the block-shaped electrodes of the electrode body for each part. This can be prevented by selecting the voltage and current density, etc.

4V) There are also technical means that lead to high-speed electrolytic treatment by changing the electrolytic voltage, current density, etc. depending on the location (electrolysis site) and time as treatment conditions, but by adopting the electrode body of the present invention, Since it is easy to obtain a function that precisely corresponds to the above-mentioned conditional operations, the effect of improving productivity in addition to improving and uniformizing the quality of the processed material is significant.

(V) In addition, in the present invention, the shape of the electrode body including the main body and the block-shaped electrodes arranged in many subdivisions can be arbitrarily obtained for the object to be processed, such as a mouth shape or a convex shape. Therefore, the effect is incomparable to the degree of uniformity obtained by using the integrated electrode in combination with an auxiliary electrode or masking in an electrolytic processing apparatus using a conventional integrated electrode.

■Although there are many types of objects to be treated, when surface treating an object that is narrower than the area occupied by the entire block-shaped electrode of the electrode body according to the present invention, the size of the object to be treated may vary depending on the width of the electrode body. Since it is not necessary to supply electricity to some of the block-shaped electrodes, it is possible to omit unnecessary power supply. Oh my,
If the overall size of the entire block-shaped electrode of the electrode body according to the present invention is made somewhat larger so as to be able to handle a wide variety of objects to be processed, such as one width, length, and surface shape,
It is convenient for surface treatment work, and increases practical benefits including economical efficiency such as energy saving.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention.
Figure 2 is a front view of Figure 2 viewed in the direction of arrow V, Figure 2 is a side sectional view of a portion of Figure 1 taken along line I-1 and viewed in the direction of arrow W; The figure is an explanatory diagram of an electrolytic state in which the electrode body according to the present invention shown in Figures 1 and 2 is arranged in an electrolytic cell. A partial longitudinal sectional side view of an electrode body formed into an irregular shape and subjected to single-sided processing. Figure 5 shows a third embodiment in which the object to be treated is a strip-shaped body, and the electrode body according to the present invention is A side sectional view of the arranged electrolytic cell portion. Fig. 6 is a plan view for explaining the electrode body according to the present invention in a fourth embodiment, in which the object to be treated has a mouth shape when viewed from above. The figure is an explanatory diagram of the configuration of an electrolytic cell and an electrolytic device using conventional integrated electrodes (corresponding to the embodiments shown in FIGS. 1 to 3 above).・
...Electrolytic cell. 12... Electrolyte. A, B, O...electrode body of the present invention. 1 a to 1 d, 2 a to 2 d, 3
a~3d', 4a~4d, 5a~5d
, 1. 2. 3. 4. 5. 1 i. ~in, 2a~2μ...Block-shaped electrode. 7... Lead wire. R,, R2...Power supply. E...Power control device. F3, 8a, 8b... Main body of the electrode body. 6... Auxiliary member.

Claims (1)

[Claims] Electrodeposition or electrolytic treatment can be performed on the surface of the object by placing electrodes in the electrolytic bath at positions corresponding to the object to be treated, supplying power to both from an electrolytic power source, and applying electricity through the electrolyte. In an electrolytic apparatus for carrying out the above-mentioned electrolysis, the electrodes include a block-shaped electrode made of an insoluble material that is divided into multiple pieces corresponding to the surface of the object to be treated, and one end of which is individually connected to the back surface of each of the block-shaped electrodes. The other end of each lead wire is extended to the outside of the electrolytic cell and is connected to a separate power source for electrolysis, and a material with electrical insulation and chemical resistance is used. a main body having a large number of electrode fitting holes arranged in subdivisions for fitting and fixing the block-shaped electrodes, and a front surface of each block-shaped electrode is exposed to the outside in each of the electrode fitting holes The electrode has an integrated composite structure with an auxiliary member that is inserted into the electrode insertion hole and the outer periphery of the side surface of the electrode to strengthen the close bond between the two and prevent the electrolyte from seeping into the main body. An electrode in an electrolytic device, characterized in that a large number of block-shaped electrodes in a subdivided arrangement of the same electrode body are individually energized, and energization conditions such as individual voltages or current densities can be applied to each of them. body.