JPH0723555B2 - Electric stripping device for both continuous and single-sided metal strips - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is to move and arrange the required number of plating cells in a short time according to the coating weight of one side and both sides of the strip without cutting the strip. The present invention relates to a continuous type single-sided / double-sided electroplating apparatus for metal strips.

<Prior Art and Its Problems> An example of a single-sided sequential electrogalvanizing facility is disclosed in Iron and Steel Institute Papers 1983-S327.

This plating facility is shown in Figures 8a and 8b.

In these figures, 3g and 3h are fixed plating cells,
4 and 7 are rinse sections, 5 and 8 are dryers, 10 is a deflector roll, 11 is a strip, and 13 is a conductor roll.

In this plating equipment, when switching from the single-sided plating shown in Fig. 8a to the double-sided plating shown in Fig. 8b and vice versa, it is necessary to cut the strip 11 and switch the plate passing path. In addition, it requires a great deal of labor and time for the operator, which is a major obstacle to improving safety and productivity.

Further, as shown in FIG. 9, a single-sided sequential plating equipment that can perform single-sided and double-sided plating without switching the strip passing path has been proposed, but this plating equipment is designed on the premise of double-sided plating. However, when it is used as one-sided plating, there is a disadvantage that the equipment efficiency is poor because the backside plating cell 3h is unnecessary and cannot be operated.

Furthermore, in recent years, surface-treated steel sheets called different thickness plating having different coating weights on the front surface and the back surface have been demanded, and even in double-sided plating, an appropriate number of cells can be freely selected corresponding to each coating weight. The development of a plating device that can be used is desired from the viewpoint of efficient use of the power source.

That is, although it is possible to control the current density of the plating cell to perform strip thickness equal or differential thickness plating, there is a quality problem particularly with alloy plating. Therefore, it is generally better to keep the current density of the plating cell constant and control the basis weight of the uniform thickness and the different thickness plating by converting the number of plating cells.

<Purpose of the invention> The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to move a plating cell without cutting the strip to determine the basis weight of each of the front surface and the back surface of the strip. It is an object of the present invention to provide a continuous single-sided / double-sided electroplating apparatus for metal strips in which a required number of corresponding plating cells can be arranged easily and in a short time.

<Constitution of Invention> Such an object is achieved by the present invention described below.

That is, the present invention is a continuous single-sided / double-sided electroplating of a metal strip having a first electroplating portion for electroplating one surface of the strip and a second electroplating portion for electroplating the other surface of the strip. In the apparatus, the first electroplating section includes at least one fixed electroplating cell for plating one surface of a strip,
At least one movable electroplating cell capable of being conveyed between the first electroplating section and the second electroplating section is arranged, and the second plating section performs plating on the other surface of the strip. At this time, at least one mobile electroplating cell transported from the first plating unit is arranged, and the mobile electroplating cell includes a first unit and a second unit.
A unit, the units being configured to be movable in and out of a strip to be plated, when moving the mobile electroplating cell between the first electroplating section and the second electroplating section, Moving the separated first and / or second unit to the side of the strip travel line,
A continuous single-sided / double-sided electroplating apparatus for metal strips, characterized in that it has a transporting means for transporting.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a continuous type single-sided / double-sided electroplating apparatus for metal strips according to the present invention will now be described in detail with reference to the accompanying drawings.

The electroplating apparatus of the present invention can be used for both single-sided plating and double-sided plating of strips.

First, the case of single-sided plating will be described.

FIG. 1 is a schematic view showing a single-sided / double-sided electroplating apparatus in a state where electroplating is performed on one side of the metal strip 11.

1 is an electrolytic cleaning device, 2 is a pickling device, 3 is a metal strip
Six electroplating cells 3a to 3f are arranged in the first electroplating section for electroplating the surface of 11. Among these 6 plating cells, 3 plating groups 3a to 3c are stationary plating cells, and the remaining 3 plating groups 3d to 3f are moving plating cells.

Reference numeral 12 is a support roll installed on the inlet side, the outlet side of the first electroplating section and the inlet side of the rinse section, and supports the metal strip 11 above the pass line of the plating.

4 and 7 are rinse sections, 5 and 8 are dryers, 12 is a deflector roll for diverting the direction of the metal strip 11, 6 is a second electroplating part for electroplating the back surface of the metal strip 11, but for single-sided plating The plating cell does not necessarily have to be present.

Reference numeral 13 is a deflector roll, and 9 is a chemical conversion treatment section.

The strip running in the direction of the arrow in FIG. 1 passes through the electrolytic cleaning device 1 and the pickling device 2, and then the first electroplating section 3
At one side (surface) is electroplated.

In the first electroplating section 3, at least one fixed plating cell and at least one movable plating cell are arranged. In the example shown in FIG. 1, three fixed plating cells 3a
.About.3c and three movable plating cells 3e to 3f are arranged, but the number is not limited to this, and the number of each plating cell can be appropriately selected depending on various conditions such as the coating weight and the line speed.

The strip 11 passes through a support roll 12 on the entry side of the first electroplating section 3 and is wound around the conductor roll 13 of the plating cell 3a and then the main roll 14 and again the conductor roll.
It moves to the adjacent plating cell 3b via 13. After the strip 11 sequentially passes through the plating cells 3a to 3f and the surface is electroplated, the strip 11 passes through the outlet side support roll 12, passes through the rinse section 4, and is dried by the dryer 5.

In each plating cell 3a to 3f of the first electroplating unit 3,
An anode 15 is provided facing the strip 11 wound around the main roll 14, and the strip 11 and the anode 15 are provided.
Inject the plating solution between 15 and strip the anode 15 and
11 and 11 are energized for electroplating.

Even in the case of such single-sided plating, the strip 11 is dried by the dryer 5 and then some deflector rolls are used.
The direction is appropriately changed by 10 and passes through the second electroplating section 6 where there is no movable plating cell, and passes through the non-operating rinse section 7 and dryer 8. After that, the strip 11 is subjected to a chemical conversion treatment in a chemical conversion treatment section 9 through a deflector roll.

Next, the case of screen plating will be described.

2 and 3 are schematic views showing a single-sided / double-sided electroplating apparatus in a state where both sides of the metal strip 11 are being electroplated. The reference numerals in these figures are the same as those described in FIG.

If plating both sides of the strip to the same thickness,
As shown in the figure, the first electroplating section 3 is provided with three fixed plating cells 3a to 3c, and the second electroplating section 6 is moved from the first electroplating section 3 to all three groups. The plating cells 3e to 3f are moved and arranged.

The strip 11 travels in the direction of the arrow in FIG. 2 and has three fixed plating cells 3a to 3a arranged in the first electroplating section 3.
One surface (surface) is sequentially plated by 3c, and the rinse section 4, the dryer 5 and the deflector roll 10 are plated.
After that, the other surface (back surface) of the strip 11 is sequentially plated by the three movable plating cells 3e to 3f arranged in the second electroplating section 6.

The case shown in FIG. 3 is the same except that the number of movable plating cells that move to the second electroplating section is different.

In the example shown in FIG. 2, since the numbers of plating cells arranged in the first electroplating section 3 and the second electroplating section 6 are equal,
If the conditions for all plating cells are equal, strip
The coating weights of 11 and 11 are equal.

On the other hand, in the example shown in FIG. 3, two movable plating cells 3e and 3f are moved from the first electroplating section 3 to the second electroplating section 6. Therefore, in the first electroplating section 3, the fixed plating cells 3a to 3c and the movable plating cell are
The surface of the strip 11 is plated with a total of 4 plating cells of 3d, and the second electroplating section 6 has 2 movable plating cells.
By plating the back surface of the strip 11 with 3e and 3f, differential thickness plating of the strip 11 is possible. That is, the coating weights of the front surface and the back surface of the strip 11 can be freely selected according to the ratio of the numbers of the plating cells arranged in the first electroplating section 3 and the second electroplating section 6.

As described above, according to the coating weights of the front surface and the back surface of the double-sided plating, the required number of plating cells are moved between the first electroplating section 3 and the second electroplating section 6 to perform electroplating. It is possible to perform plating without overloading the electroplating cell, and it is possible to obtain a plated steel sheet with a good appearance that does not cause burns even at high speed.

Next, a configuration example of the movable plating cell and its operation will be described.

An example of the structure of the movable plating cell is shown in FIGS.

When moving the movable plating cell, raise the main roll 14 above the line as shown in FIG.
It is necessary to be in a state of being separated from 11. Therefore, the movable plating cell is composed of an upper unit composed of the main roll 14 and the upper cover 26, the plating tank 20, and the anode 15.
And a lower unit composed of a conductor roll 13, and these two units are configured to operate so that they can come into contact with and separate from each other with the strip 11 as a boundary.

With such a configuration, it is possible to carry out the units of the movable plating cell to the outside of the strip running line and to the inside of the line without separating the strips 11 from each other.

Figure 5 shows the main roll 14 and top cover in line
Raise the upper unit consisting of 26 and strip 11
FIG. 3 is a cross-sectional view of a movable electroplating cell in which the roller is not in contact with a roll or a cover in the apparatus. 13 is a conductor roll, 17 is an upper casing, 16 is a lower casing, 15 is an anode, 25 is a lifting cylinder, 21 is a plating solution supply pipe, 22 is a plating solution discharge pipe, 23 is a booth bar, and 17 is a metal fitting.

The upper casing 17 includes a main roll 14 and an upper cover.
An upper unit consisting of 26 is fitted. The lower casing 16 is equipped with a lower unit including a conductor roll 13, a plating tank 20, and an anode 15,
The wheels 24 rest on the rails of the line bridge 32. The upper casing 17 and the lower casing 16 are set and integrated by a guide bar 18 and a guide 19, respectively. The guide 19 has a mechanism that can slide along the guide bar 18, and the upper cylinder 17 can be moved up and down by the lifting cylinder 25.

The mobile plating cell, if you are electroplating,
As shown in FIG. 6, in a state where the upper unit descends and the strip 11 is wound around the main roll 14, both sides of the strip 11 that are in contact with the main roll 14 face the anode 15 and the current is applied. Then, the surface is electroplated. At this time, each roll has a drive motor 30 and a connecting rod.
It is connected to 31 and driven.

The operation when the plating cell is moved between the first electroplating section and the second electroplating section will be described.

After running the line, stopping the supply of plating solution and stopping the energization, connect each roll to the drive motor 30 and supply tube of the plating solution.
21 and the coupling of the discharge pipe 22 are removed, and the booth bar 23 is separated.

Next, the elevating cylinder 25 is driven to gradually raise the upper casing 17. When the upper casing 17 rises to a certain extent, the strip 11 no longer contacts the conductor roll 13 and then the main roll 14, whereupon the upper casing 17 is stopped. As a result, the state shown in FIGS. 4 and 5 is obtained.

In this state, the movable plating cell is carried out to the side of the line (the direction of the arrow in FIG. 5). The movement of the plating cell is preferably performed by the wheels 24 pivotally supported by the lower unit rolling on the rails of the line frame 32.

In one electroplating section, the movable plating cell carried out to the side of the line is
It is transported to the other electroplating section.

As a preferred example of the transfer means, as shown in FIG. 5, it is preferable to mount a transfer plating cell on a transfer carriage 50 that moves in parallel with the traveling direction of the strip 11 and to transfer it. A crane hook is hooked on the hanging metal fitting 27 provided on the casing 17 and lifted by a crane for transportation, or a rail having a movable plating cell is extended to the other electroplating portion and transported along this rail. It is possible.

After transporting the movable plating cell to the other electroplating section by such a transporting means, the plating cell is loaded into the line by a procedure reverse to the above-described unloading of the plating cell and returned to the state shown in FIG. Start electroplating again.

The movable plating cell shown in FIGS. 5 and 6 cantilevers the upper casing 17 from the lower casing 16, but as shown in FIG. 7, a rail is provided in the line frame 33 above the line, Place the trolley 40 on this rail,
The upper casing is fixed by the lifting cylinder 41 fixed to
It is also possible to adopt a configuration in which lifting and lowering is carried out while supporting 16.

In the example shown in FIG. 7, the upper unit attached to the upper casing 17 and the lower unit attached to the lower casing 16 are separated, and these are individually conveyed to the other electroplating section.

The casings 16 and 17 can be transported by the same means as described above.

Further, when the upper unit and the lower unit are separated, only the lower unit can be transported, and the upper unit can be supported by the lifting cylinder fixed to the line frame 33. . In this case, the upper casing is installed corresponding to the positions where the movable plating cells 4d to 3f of the first electroplating section and the second electroplating section are set. In the case of such a configuration, since only the lower unit is moved, the transportation means is simplified and the work efficiency is improved.

On the other hand, it is preferable to use a fixed type plating cell having the same structure as that of the movable type plating cell except that the conveying type means is not provided.

The above description is for a radial type plating cell as shown in FIGS. 4 to 7, but the movable and fixed plating cells in the present invention are not limited to this.

For example, an inverted U-shaped plating cell, which is the reverse of the radial type, and a plating called a horizontal type or a vertical type can be mentioned.

In short, it is only necessary that the strip can be divided into the first and second units that can be relatively joined and separated from each other.

<Effects of the Invention> According to the continuous single-sided / double-sided electroplating apparatus for metal strips of the present invention, a movable electroplating cell movable between the first electroplating section and the second electroplating section is arranged. As a result, it is possible to freely select an appropriate number of plating cells corresponding to each coating weight on the front and back of the strip when performing double-sided differential thickness plating, as well as switching between single-sided plating and double-sided plating.

Moreover, the number of electroplating cells to be installed can be minimized, and the equipment efficiency can be improved because the number of non-operating plating cells is small during single-sided and double-sided plating.

Further, according to the continuous single-sided / double-sided electroplating apparatus for metal strips of the present invention, the movable electroplating cell is composed of an upper unit and a lower unit which can be connected and separated, and the upper unit is lifted to the upper side of the lower unit. Since the movable electroplating cell is carried out and carried in in the detached state, the electroplating cell can be safely carried in a short time without cutting the strip by a simple operation.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a continuous single-sided / double-sided electroplating apparatus for a metal strip in a state where the single-sided plating is performed according to the present invention. FIGS. 2 and 3 show a continuous single-sided surface of a metal strip according to the present invention, which is subjected to equal-thickness and differential-thickness double-sided plating,
It is a schematic diagram which shows a double-sided electroplating apparatus. FIG. 4 is a schematic front sectional view showing a state in which the upper unit of the mobile electroplating cell used in the present invention is separated from the lower unit. FIG. 5 is a side sectional view showing an example of a mechanism during movement of the mobile electroplating cell used in the present invention. FIG. 6 is a side sectional view showing an example of a mechanism during plating of the mobile electroplating cell used in the present invention. FIG. 7 is a side sectional view showing an example of a mechanism during movement of a mobile electroplating cell in which an upper casing and a lower casing used in the present invention are separated. 8a and 8b are diagrams showing a conventional electroplating facility. FIG. 9 is a diagram showing a conventional single-sided sequential electroplating equipment for double-sided plating. Explanation of reference numerals 1 ... Electrolytic cleaning device, 2 ... Pickling device, 3 ... 1st electroplating part, 3a-3c ... Fixed plating cell, 3d-3f ... Mobile plating cell, 3g, 3h ... … Fixed plating cell, 4,7 …… Rinse section, 5,8 …… Dryer, 6 …… Second electroplating section, 9 …… Chemical conversion section, 10 …… Deflector roll, 11 …… Strip, 12… … Support roll, 13 …… Conductor roll, 14 …… Main roll, 15 …… Anode, 16 …… Lower casing, 17 …… Upper casing, 18 …… Guide bar, 19 …… Guide, 20 …… Plating tank, 21 …… plating solution supply pipe, 22 …… plating solution discharge pipe, 23 …… booth bar, 24 …… wheels, 25 …… lifting cylinder, 26 …… upper cover, 27 …… hanging metal fitting, 30 …… drive motor , 31 …… Connecting rod, 32,33 …… Line frame, 40 …… Bogie, 41 …… Lift for lifting Loaders, 50 ...... transport truck,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takao Ikenaga 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (no address) Inside Mizushima Works, Kawasaki Steel Co., Ltd. (72) Shuji Iwamoto 1 Mizushima-kawasaki-dori, Kurashiki-shi, Okayama Prefecture (No.) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor Yu Mizuta 1 Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Technical Research Department (72) Inventor Shinjiro Ishikawa Mizushima Kawasaki, Kurashiki-shi, Okayama Prefecture 1 chome (no address) Kawasaki Steel Co., Ltd. Mizushima Steel Works (56) References JP 61-64896 (JP, A) JP 61-67798 (JP, A)

Claims (1)

[Claims] 1. A continuous single-sided / double-sided electric strip of a metal strip having a first electroplated portion for electroplating one surface of the strip and a second electroplated portion for electroplating the other surface of the strip. In the plating apparatus, the first electroplating section includes at least one fixed electroplating cell for plating one surface of a strip,
At least one movable electroplating cell capable of being conveyed between the first electroplating section and the second electroplating section is arranged, and the second plating section performs plating on the other surface of the strip. At this time, at least one mobile electroplating cell transported from the first plating unit is arranged, and the mobile electroplating cell includes a first unit and a second unit.
A unit, the units being configured to be movable in and out of a strip to be plated, when moving the mobile electroplating cell between the first electroplating section and the second electroplating section, Moving the separated first and / or second unit to the side of the strip travel line,
A continuous single-sided / double-sided electroplating apparatus for metal strips, which has a transporting means for transporting.