JPS5893897A - Exchanging method for lower electrode in horizontal type electroplating cell for steel plate - Google Patents

Abstract

PURPOSE:To permit extremely easy exchange of lower electrodes even during operation of a line by providing a chain conveyor which passes below the steel plate to be plated in a horizontal type electroplating cell for steel plates. CONSTITUTION:Upward divergent slopes are formed on both sides of a plating soln. tray 4, and a chain conveyor 12 which runs orthogonally with the advancing direction of a steel plate S to be plated traveling in the tray 4 below said plate is put on the chain wheels 11, 12 provided on both sides in the outer upper part of the tray 4 and guided by a rail 13. New lower electrodes 6 are beforehand placed on the conveyor 12 on one outer side of the tray 4, and the consumed electrodes 6 are transferred from a lower electrode support 7 onto the conveyor 12. The wheels 10, 11 are rotated synchronously to run the conveyor 12 in the direction of the other side, by which the consumed electrodes 6 are removed. At the same time, the new electrodes 6 are fed into the tray 4 and are placed on the support 7, whereby the exchange of the electrodes 6 is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for replacing a lower electrode in a horizontal steel plate electroplating tank.

Generally, a horizontal steel plate electroplating tank that electroplates both sides of a steel plate at the same time is provided with a main tank 1 and the upper part of the entrance and exit sides of the main tank 1, as shown in Figs. 1 and 2. each pair of conductor rolls 2 and a plating solution tray 4 provided in the backup roll 1;
a pair of dam rolls 5 provided at the upper positions of the inlet and outlet sides of the tray, a lower electrode support 7 on which the lower electrode 6 in the tray 4 is placed, and a hanger 8 in which the upper electrode 8 in the tray 4 is placed.
The steel plate S to be plated passes through a contactor roll 2 and a backup roll 3 on the entry side of the parent tank l, and then is transferred to a dam roll 5 and a tray 4. It enters the enclosed plating solution and is electroplated by opposing upper and lower electrodes 8.6.

Each of the supports 7 and 9 has a lifting device 7-9a.
is provided to maintain a constant distance between the electrodes 6 and 8 and the steel plate S to be plated, which are consumed during plating.

By the way, when each of the electrodes 6.8 is worn down to a certain limit, it is necessary to replace it with a new electrode, and the upper electrode 8 can be replaced with a new electrode on the upper part using a crane or the like.

However, when replacing the lower electrode 6, it is necessary to stop the line, transfer the plating solution from the tray 4 to the main tank l, and cut the steel plate S to be plated, making the work required for replacement complicated. Unfortunately, this significantly reduced productivity.

The present invention makes it possible to extremely easily replace the lower electrode even during line operation, and an example of its implementation will be described below with reference to FIGS. 3 and 4. .

As shown in FIGS. 3 and 4, both side walls of the plating solution tray 4 are formed into sloped surfaces that spread upward from the middle, and chain wheels 10 and 11 are provided on both sides of the outer upper part of the tray 4. A chain conveyor 12 is passed between the chain wheels 10 and 11 and passes below the steel plate S to be plated in the tray 4 in a direction perpendicular to the traveling direction of the steel plate S to be plated. Place the required number of lower electrodes 6 in parallel on top of the chain wheel 1.
0 and 11 to run in the other direction, thereby carrying the lower electrode 6 on the chain conveyor 12 to the lower side of the steel plate S to be plated,
Next, this lower electrode 6 is transferred from the chain conveyor 12 onto the lower electrode support 7 by raising the lower electrode support 7, and the distance between the lower electrode 6 and the steel plate S to be plated is set to a predetermined value. , electroplating the steel plate S to be plated.

While the steel sheet S to be plated is being electroplated, a required number of new lower electrodes 6 are placed in parallel in advance on the chain conveyor 12 on the outer side of the tray 4, and the steel sheet S to be plated is The lower electrode 6 on the lower side of
When the lower electrode support 7 is lowered to transfer the used lower electrode 6 onto the chain conveyor 12, the lower electrode support 7 is lowered and the used lower electrode 6 is transferred onto the chain conveyor 12.
2. Move the lower electrode 6 toward the other side, carry out the worn out and used lower electrode 6 to the other side of the tray 4, and replace it with a new lower electrode 6.
is carried to the lower side of the steel plate S to be plated, and this new lower electrode 6 is transferred onto the lower electrode support 7 in the same manner as above, and the distance between the new lower electrode 6 and the steel plate S to be plated is set to a specified value. Perform electroplating.

In FIG. 4, a new lower electrode 6 is carried in to the lower side of the key plate S to be replaced, and the worn out lower electrode 6 is carried out to the other side of the tray 4. A situation is shown in which a required number of new lower electrodes 6 are placed in parallel on the chain conveyor 12 in advance.

Note that the used lower electrode 6 carried out to the other side of the tray 4 is removed from the chain conveyor 12.

Here, the chain conveyor 12 will be briefly described.

At least a guide rail 13 as shown in FIGS. 3 and 4 is provided in the tray 4 so that the chain conveyor 12 between the chain wheels 10 and 11 can run along the inner surface shape of the tray 4. In order to maintain the slack of the chain wheel 10,
, 11 are rotated synchronously.

The reason why the chain conveyor 12 can be operated in forward and reverse directions is to relatively accurately position the lower electrode 6 below the steel plate S to be plated, and also because the width of the steel plate S to be plated has been changed so that the lower electrode If the number of installed lower electrodes 6 is too large, remove the lower electrodes 6 on both sides by carrying them out of the tray 4. After removing the excess lower electrodes 6, place the lower electrodes 6 back into the tray 4. This is to allow them to be brought inside.

As described above, the present invention is directed to the outside of the plating tank from the upper side of the plating tank so that the plated steel plate in the horizontal steel plate electroplating tank passes at right angles to the traveling direction of the broken plated steel plate. A conveyor that can be operated in forward and reverse directions is installed across the top of the plating tank, and conveys a new lower electrode from the upper side outside the plating tank to the lower side of the steel plate to be plated, and also transports the used lower electrode to be plated. Since the steel plate is transported from the bottom side to the other side of the upper part outside the plating tank, operations such as replacing the lower electrode and changing the number of lower electrodes to be installed due to changing the width of the steel plate to be plated can be carried out while the line is running. Furthermore, the plating can be carried out very easily without draining the plating solution, and the lower electrode can be positioned relatively accurately below the steel plate to be plated, contributing to improved productivity.

[Brief explanation of drawings]

Figure 1 is a schematic longitudinal sectional side view showing a conventional example of a horizontal steel plate electroplating tank, Figure 2 is a sectional front view of the same, and Figure 3 is a horizontal 4
FIG. 4 is a schematic longitudinal sectional side view showing an example of an embodiment of the present invention of a type steel plate electroplating tank, and FIG. 4 is a sectional front view of the same. Figure 1-1112

Claims (1)

[Claims] A cross is provided from the top side of the outside of the plating tank to the other side of the top of the outside of the plating tank so that it passes below the steel plate to be plated in the horizontal steel plate electroplating tank orthogonally to the traveling direction of the steel plate to be plated. A conveyor that can be operated in forward and reverse directions transports a new lower electrode from the upper side outside the plating bath to the lower side of the steel plate to be plated, and plating the worn out lower electrode from the lower side of the steel plate to be plated. A method for replacing a lower electrode in a horizontal steel plate electroplating tank characterized by carrying it out to the other side of the upper part outside the tank.