JPS5933679B2 - Anode plating equipment for strips - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anode plating apparatus for continuously electroplating a traveling strip.

As shown in Figures 1 and 2, a conventional horizontal anode plating apparatus has an L-shaped anode support A set in an electrolytic bath (not shown), an inclined support surface B of A, and a rod on B. A plurality of rod-type anodes Cl, C2, .
・By applying a (+) current to the rod-shaped anodes Cl, C
2, . . . are dissolved to form metal ions, which are electrodeposited on the plated surface of the strip D via an electrolytic solution.

Moreover, as shown in FIGS. 3 and 4, the vertical anode plating apparatus has a plurality of inverted L-shaped rod-shaped anodes C'1, C', etc. mounted on an inverted L-shaped anode support N. And rod-shaped anode C? , C'2, .

In the conventional anode plating apparatus, the rod-shaped anodes Cl,...Cl have different anode thicknesses due to the difference in dissolution rate, and unevenness as shown in the figure occurs on the plated surface and the anode surface, resulting in uneven plating thickness. arise.

Furthermore, when replacing the rod-shaped anode during operation, since one rod-shaped anode weighs 30 to 80 mm, it is necessary to lift it with a crane or the like, resulting in very poor work efficiency. SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide an anode plating apparatus for strips that can easily replenish the anode and obtain a uniform plating thickness.

The structure of the present invention will be explained in detail based on a first embodiment shown in FIGS. 5 to 1. A closed anode tank 2 having a rectangular cross section and containing a granular anode 1 has a grid 3 on the strip D side. An opening 4 is provided, and a membrane 5 made of, for example, cloth, a semipermeable membrane, etc., through which the electrolyte can freely pass, is fixed inside the opening 4.

The anode tank 2 has a lining (rubber, synthetic resin, etc.) having sufficient corrosion resistance and insulation properties against plating on its outer surface, and a conductive lining (carbon, etc.) on its inner surface.

Introductory pipes 6, 6' are provided at both ends of the upper surface, and both introductory pipes 6, 6' are connected to distribution branch pipes 8, 8' via insulators 7, T'. Further, a current-carrying terminal 9 is fixed to one of the introduction tubes 6. Anode tank 2 configured as described above
As shown in Fig. □, four openings 4 are installed in the electrolyzer 10 so as to face each other.

The distribution branch pipes 8 and 8' are each connected to one distribution pipe 11, and a total of four distribution pipes 11 are connected to an anode storage tank 13 via one connection pipe 12. or,
The electrolytic cell 10 is provided with a plurality of conductor rolls 14, . . . for guiding the strip D upward and downward.

The first embodiment is constructed as described above, and when a (+) current is passed through each current-carrying terminal 9, the granular anode 1 in the anode tank 2 is electrochemically dissolved and becomes metal ions to form a film 5. It passes through and is electrodeposited on the plating surface of the strip D.

This granular anode 1 gradually becomes smaller and disappears due to electrochemical dissolution.

During the process of dissolution of the granular anodes 1 on the melting surface, gaps are created between the granular anodes 1, but the granular anodes 1 located near these gaps fill the gaps with their own weight.
Fresh granular anode 1 is automatically supplied from the anode storage tank 13 and filled from time to time. Therefore, the distance between the surface to be plated and the anode surface is always kept constant, and a uniform plating thickness can be obtained. Next, the second embodiment will be explained in detail based on the drawings shown in FIG. 8 and below. This embodiment is a horizontal type anodizing apparatus. The anode tank 2 has a bottom wall 14
is formed in a shape that is inclined towards the center, and one support leg is placed at every four intervals.
5,... are provided.

Conductor tubes 6, 6' are provided at both ends of the upper surface, and insulators 7,
7'' to connecting pipes 12 and 1Z, and are connected to anode storage tanks 13 and 13 (not shown).Inside the anode tank 2, as shown in FIG. Bearings 16, 16'' are provided and stirring blades 17,...
- Stirring shaft 18, 18' with a large number of fixed
It is pivoted at an angle of 700°.

Both stirring shafts 18, 18' are connected via universal couplings 19, 19' to the inlet pipes 6, 6' and the connecting pipe 12.
, 12', and the upper end of the vertical shaft 20,2σ is connected to the 1 drive shaft 22 installed outside the connecting pipe 12, 12' through a universal coupling 21, 2Y. , 2Z. This drive shaft 22
, 2Z are coupling rings 23, 23' and reducers 24, 2
1 by drive motors 25, 25'. Since the other parts are the same as those in the first embodiment, the same reference numerals are given and the explanation will be omitted.

In the second embodiment, the stirring shafts 18, 18' are rotated by the driving of the drive motors 25, 25', and the granular anodes 1 move toward the center of the anode box 2, filling the gaps between the granular anodes and displacing the surface to be plated. In order to maintain a constant distance between the granular anodes and the granular anodes, in the second embodiment, the granular anodes 1 are forcibly stirred and moved to reliably fill the gaps between the granular anodes that have become smaller due to melting. By keeping the distance between the electrodes and the surface to be plated constant, it is possible to obtain a uniform plating thickness for any shape of the surface to be plated.

Since the present invention has the configuration and operation as in the above embodiment,
Since a granular anode is used, the granular anode can always be positioned on the anode melting surface having a certain distance from the surface to be plated, and a uniform plating thickness can be obtained.

Also, the granular anode can be automatically fed to the anode melting surface, which is very efficient, and it is very convenient because there is no need to replace the anode as in the conventional method.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional horizontal anode plating device, Fig. 2 is a side view thereof, Fig. 3 is a perspective view of a conventional vertical anode plating device, Fig. 4 is a cross-sectional plan view thereof, and Fig. 5 6 is a front view of the main parts showing the first embodiment of the anodizing device for strips according to the present invention, FIG. 6 is a perspective view taken along the line in FIG. 5, FIG. 7 is a layout diagram, and FIG. The longitudinal cross-sectional view of the second embodiment and FIG. 9 do not show perspective views of essential parts, respectively. In the figure, 1 is a granular anode, 2 is an anode box, and 4 is a granular anode.
is an opening, and 5 is a membrane.

Claims (1)

[Claims] 1. A current-carrying terminal 9 is fixed to one end of the anode box 2 to be filled with the granular anode 1, an introduction tube 6 is provided for introducing the granular anode 1, and a planar opening 4 is provided with a grid 3 on the plating surface side. An anode plating apparatus for a strip, characterized in that the granular anode 1 is arranged in a plane on the inner surface of the opening 4, and a membrane 5 formed to allow the electrolyte to pass therethrough is attached.