JPH0426795A - Continuous electroplating device - Google Patents

Abstract

PURPOSE:To improve the C warpage straightening effect, to decrease the distance between electrode plates and to reduce the power cost by specifying the position of a cushion nozzle. CONSTITUTION:One cushion nozzle on the convex surface side of a steel strip is set at the surface position of one electrode plate. The other cushion nozzle is set at a position projecting from the setting surface of the electrode plate toward the strip side. Consequently, a plating soln. injected toward the convex surface of the strip is supplied between the strip and electrode plate, the pressure of the plating soln. is increased in a space to the right of the strip, and the C warpage is straightened and reduced. The distance x2 between the electrode plate surface and the concave surface side of the strip and the distance x1 between electrode plate surface and the convex surface side of the strip are almost equalized, and the C warpage amt. x0 of the strip is reduced.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a continuous electroplating apparatus for e.g. copper strips.

(Prior Art) A conventionally used continuous plating apparatus will be explained with reference to FIG. FIG. 3 is a schematic explanatory diagram of a conventional continuous electroplating apparatus, in which the left side of the AA line in the figure shows a schematic side view of the apparatus, the right side shows a schematic cross-sectional view of the apparatus, and The left side shows the down pass, and the right side shows the up bus.

In FIG. 3, reference numeral 1 denotes an electrolytic bath, and the electrolytic bath 1 is filled with a plating solution, and an electrode plate 2.2 immersed in the plating solution and facing each other is disposed. . Further, a rubber roll 3 is provided inside the electrolytic cell 1, and a conductor roll 4.4 is provided outside the electrolytic cell 1. These rolls guide and continuously feed the steel strip 5 between the opposing electrode plates 2, and the conductor crawler 4 feeds the steel strip 5 between the facing electrode plates 2.
It is designed to be energized. A voltage is applied between the conductor crawler 4 and the electrode plate 2, and when the steel strip 5 passes between the electrode plates 2, the surface thereof is electroplated. There is.

Further, at one end of the electrode plate 2, there is a supply nozzle for injecting a plating liquid flow in a direction parallel to and opposite to the traveling direction of the steel strip 5 into a flow path surrounded by the electrode plate 2 and the steel strip 5. 9.9 is installed.

Further, a contact prevention plate 8 is provided on the surface of the electrode plate 2 to prevent contact with the steel strip 5. The above is the configuration of a typical conventional continuous electroplating apparatus.

Now, on each of the electrode plates 2 disposed on both sides of the steel strip 5 that is continuously fed, a suline l-6 is formed in the thickness direction. The swan 1-6 will be described with reference to FIG. 4, which is a schematic cross-sectional view showing an enlarged portion of the electrode plate 2 (cushion nozzle portion).

As shown in FIG. 4, the slits 6 are formed with alternately opposite inclinations in the direction of travel of the steel strip 5, and are symmetrical with respect to the steel strip 5 in FIG. Further, a header 7 is provided which surrounds two slints l-6 having opposite inclinations to each other,
Inside the header 7, a pipe (not shown) is provided for supplying the coating solution. A pump (not shown) is provided that increases the pressure of the plating solution in the electrolytic cell 1 and supplies it to this pipe. That is, the plating solution pressurized by the pump is supplied into the header 7 through the pipe and is injected onto the surface of the steel string 5 from the slit 6. That is, the slit 6 functions as a cushion nozzle for spraying the plating solution.

On the other hand, the electrode plate 2 has a slit 6 surrounded by a header 7.
A bypass flow path 11 is formed on the back side of the plating liquid, and among the plating liquid injected from the slit 6, the liquid flow in the opposite direction to the liquid flow injected from the end of the electrode plate 2 parallel to and opposite to the steel nut trip 5 is formed. It is configured to flow through this bypass channel 11 in the same direction as all liquid flows.

In this way, since the slit 6 acts as a cushion nozzle, the pass line of the steel strip 5 can be positioned approximately at the center between the electrode plates 2, and the distance between the electrode plates 2 can be shortened. A good effect is that power loss during operation can be reduced.

(Problems to be Solved by the Invention) As described above, in the conventional continuous electric polishing device, the cushion nozzle for correcting the C warp that occurs in the width direction of the steel strip has a structure in which the rubber 11-ru 3 and the conductor Pass lines 10 are formed by connecting tangents to the crawl 4 with straight lines and are arranged at equal intervals.

However, the actual positional relationship between the steel strip 15 and the cushion nozzle is such that the steel strip 5 is not necessarily parallel to the cushion nozzle. Figure 5 shows the fourth
4 is a schematic explanatory diagram showing a cross section taken along line 1-A in the figure, and the reference numerals in the figure are the same as those in FIG. 4. FIG. As shown in FIG. 5, in reality, the C warp is not completely eliminated, so the gap between the slip 1 and the convex example (X,) is wide, and the gap on the concave side of the string (X2
) had become narrower. In addition, in FIG. 5, 10 indicates the original passing position (pass line) of the steel strip.

- When considering the C warp correction effect of the cushion nozzle for boat fishing, the effect of C warp 1 (Xo) is greater as the cushion nozzle is closer to the steel strip, but in the state shown in Fig. 5, Since the amount of C warp is too large, the C warp correction effect is not fully exhibited. Therefore, due to the presence of C warpage, it has not been easy to reduce the distance between the electrode plates.

Herein, the purpose of the present invention is to solve the above problems.
Specifically, by increasing the C warp correction effect,
It is an object of the present invention to provide a continuous electroplating device capable of shortening the distance between electrode plates and further reducing power cost 1-.

(Means for Solving the Problems) The present inventors have made various investigations/1 in order to solve the problems described in "-".
It is important to improve the C-warp correction effect of the Kunjong nozzle on the convex side of the steel strung (to the right of the steel strip 5 in Fig. 5) where C-warp has occurred as a result of repeated efforts. I found out.

As a result of further studies based on such knowledge, it was found that changing the installation position of the cushion nozzle was effective in solving the above problem, and the present invention was completed. .

Here, the gist of the present invention is to provide electrode plates facing each other, between which a steel strip is conveyed, and a supply nozzle provided at two ends of the electrode plates to supply a plating solution between the electrode plates. and a cushion nozzle provided oppositely in the middle of the electrode plate in the direction in which the steel strip advances, wherein one of the cushion nozzles is installed so that its tip is on the same plane as the surface of one of the electrode plates, and the other cushion nozzle is placed in a position where its tip protrudes further toward the steel strip side than the surface of the other electrode plate. This is a continuous electroplating device characterized by being installed in a continuous manner.

(Operation) Hereinafter, the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 1 is a schematic longitudinal cross-sectional view showing the configuration of an example of a cushion nozzle used in a continuous electric meshing device according to the present invention, and FIG. This is a schematic cross-sectional diagram showing the positional relationship with the steel strip. Note that the reference symbols in FIGS. 1 and 2 are exactly the same as those used in FIGS. 3 and 4.

As shown in Fig. 2, the key points of the present invention are to install the cushion nozzle on the convex side of the steel strip close to the steel strip surface in order to eliminate C warping, and to install one cushion nozzle on the side of the steel strip close to the surface of the steel strip. The second cushion nozzle is installed so as to be flush with the installation surface of the other electrode plate, and the other cushion nozzle is installed so as to protrude into the steel strip surface from the installation surface of the other electrode plate.

Therefore, the plating solution sprayed onto the convex side of the steel strip is supplied between the steel strip and the electrode plate, and the pressure of the plating solution against the steel strip increases in the space on the right side of the steel strip, correcting and reducing C warpage. In order to be
The distance between the electrode plate surface and the strip surface side (X2) and the distance between the electrode plate surface and the strip surface side (Xl) become a gap, etc., and the amount of C warpage (XO) of the steel strip itself decreases. , C The warpage correction effect increases.

Therefore, it is no longer necessary to set the distance between the electrode plates by anticipating a large amount of C warpage as in the past, so the expected amount of C warp can be reduced compared to the past, and the distance between the electrode plates can be set more than before. Can be shortened.

As mentioned above, there is no particular restriction on the amount of deviation when installing the cushion nozzle on the convex side of the steel strip close to the strip surface, but when the distance between the pass line and the electrode is 10 mm, it is stable. From the point of view of threading, 4mm
It is desirable that the distance is about 6 mm.

In addition, in the continuous electroplating apparatus according to the present invention,
Except for the structure of the lapping nozzle, the same as the conventional continuous electroplating apparatus shown in FIG. 3 may be used.

That is, in order to use the continuous electroplating apparatus according to the present invention, it is only necessary to replace only the cushion nozzle portion with the nozzle used in the present invention described in detail above, so the present invention can be realized at an extremely low cost. And it can be done easily.

Furthermore, an embodiment of the continuous electric plating device according to the present invention will be described.

(Example) The overall configuration of the continuous electroplating apparatus used in this example is the same as that of the conventional method shown in FIG. What is different is the cushion nozzle section, and the cushion nozzle section will be explained with reference to FIG.

In Fig. 1, the arrangement of the cushion nozzle combined with the slit 6 and the spatula 7 is such that the concave side of the steel plate 1-IJ knob 5 is located at the electrode plate mounting surface, and the convex side is located at the electrode surface. The structure is deviated by 6 mm towards the steel strip side.

In other words, the cushion nozzle is installed at a position eccentric to the pass line. However, the bipolar plate 2 is
It is attached at equal intervals (10 mm) to the pass line.

With a continuous electroplating apparatus having such a configuration, electrolytic Zn plating is continuously performed on a steel strip, which is an object to be processed.
C-curvature correction effect ((Xo) in FIGS. 2 and 5) and the amount of electric power used were measured. Note that X0 was measured using an eddy current distance meter.

As a result, the C warp correction effect was 5.5 mm, and the electric power was 113 KWH/T.

On the other hand, when similar electrogalvanizing is performed using a continuous electroplating apparatus with a conventional configuration (configurations shown in Figures 3 and 4), the C warp correction effect is 2 mm, and the electric energy is 127 mm. It was KIQII/T.

From the above, the effects of the present invention are clear.

(Effects of the Invention) As explained above, by using the continuous electroplating apparatus according to the present invention, the effect of correcting the C warp occurring in the steel strip that is the material to be processed is improved, and the distance between the electrodes is reduced. This allows further reduction in power cost.

Furthermore, it is extremely easy to modify and apply a conventional continuous electroplating apparatus to the apparatus according to the present invention.

The significance of the present invention having such effects is extremely significant.

[BRIEF DESCRIPTION OF THE DRAWINGS] Part 1 is a schematic longitudinal sectional view showing an enlarged view of a cushion nozzle used in a continuous electroplating apparatus according to an embodiment of the present invention. Fig. 2 is a cross section taken along line B-B in Fig. 1. FIG. 3 is a schematic partial vertical sectional view showing the overall configuration of a conventional continuous electroplating device; FIG. 4 is a schematic sectional view showing a cushion nozzle used in a conventional continuous electroplating device; and FIG. 5 is diagram A in FIG. 4. 1: Electrolytic cell 3; Rubber roll 5: Schematic cross section showing steel strip A cross section 2: Electrode 4: Conductor roll 6 Nislit 7: Header 8: Contact prevention plate 9: Supply nozzle 10: Pass line 11: Bypass channel

Claims (1)

[Claims] A supply nozzle provided at the upper end of the electrode plate to supply a plating solution between the electrode plates, and a supply nozzle facing opposite to each other between which the steel strip is conveyed; a continuous electroplating apparatus having a cushion nozzle provided with
One cushion nozzle is installed so that its tip is flush with the surface of one of the electrode plates, and the other cushion nozzle is installed so that its tip is closer to the steel strip than the surface of the other electrode plate. A continuous electroplating device characterized by being installed in a protruding position.