JPS6277496A - Vertical type electrogalvanizing device - Google Patents

Abstract

PURPOSE:To form plating films having a uniform compsn. without unevenness by maintaining the uniform flow rate of an electrogalvanizing bath flowing between each of a pair of the 1st electrode plates and a pair of the 2nd electrode plate disposed in a cell and a steel strip moving in the cell. CONSTITUTION:The vertical type electrogalvanizing cell 11 is constituted of the 1st vertical passage 12 on the inlet side of the steel strip 5, the 2nd vertical passage 13 on the outlet side and a horizontal passage 14 in the bottom. The electrogalvanizing bath is housed in the cell 11. The steel strip 5 successively passes through the 1st vertical passage 12, the horizontal passage 14 and the 2nd vertical passage 13 via a conductor roll 2, sink rolls 3 and a conductor roll 4. Both faces of the steel strip are electrogalvanized while the steel passes between a pair of the electrode plates 6, 6 disposed in the passage 12 and a pair of the electrode plates 7, 7 disposed in the passage 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention involves guiding a steel strip into a vertical electrogalvanizing tank, and coating the surface of the copper strip with an electrode plate vertically arranged in the electrogalvanizing tank. This invention relates to a vertical electrogalvanizing apparatus for electrogalvanizing.

[Prior art and its imitation points]

The surface of the copper strip is zinc, 1i7c is zinc and iron.

2. Description of the Related Art A vertical electrogalvanizing apparatus is known as an apparatus for electroplating with an alloy consisting of at least one of nickel, cobalt, chromium, etc., which requires a small site area.

FIG. 3 is a schematic longitudinal sectional view of a conventional vertical electrogalvanizing apparatus. As shown in FIG.
Above the J-tube entry side is a first conductor roll 2 for guiding the steel strip 5 substantially vertically downward into the electrogalvanizing bath 1 and for energizing the steel strip IJ-tube 5. It is located. In the lower part of the electrogalvanizing tank 1, there is a steel strip 5 led into the electrogalvanizing tank 1.
A sink roll 3 is disposed for reversing the moving direction upward. Above the steel strip exit side of the electrogalvanizing bath 1, a second conductor roll is provided for guiding the steel strip 5 upwardly substantially vertically from the electrogalvanizing bath 1 and for energizing the steel strip 5. 4
A pair of first electrode plates 6, 6 for electrogalvanizing both surfaces of the IJ tube 5 are placed in the electrogalvanizing bath 1.
and a pair of second electrode plates 7.7 are arranged. A pair of first electrode plates 6, 6 are arranged between the first conductor roll 2 and the sink roll 3, with the steel strip 5 moving downward in the electrogalvanizing tank 1 in between. 5, and is arranged substantially parallel to 7, 1.
The pair of second electrode plates 7, 7 are arranged between the sink roll 3 and the second duct roll 4, with the steel strip 5 moving upward in the electrogalvanizing tank 1 in between. 5 and are arranged substantially parallel to each other.

At the lower part of the electrogalvanizing tank 1, a pair of first nozzles 8, 8 and 1 are provided for supplying an electrogalvanizing solution into the electrogalvanizing tank 1 to form an electrogalvanizing bath therein. A pair of second nozzles 9, 9 are arranged. first of a pair
Each of the nozzles 8, 8 and the pair of second nozzles 9, 9,
A pair of first electrode plates 6, 6 and a pair of second electrode plates 7, 7
A pair of first electrode plates 6, 6 and a pair of second electrode plates are arranged so that an ascending flow of electrogalvanizing bath at a predetermined flow rate is formed between each of the IJ tubes 5 and the IJ tube 5. 7° 7, facing upwardly and proximate its lower end. An electrogalvanizing bath discharge pipe 10 is provided at the upper end portion 1a of the electrogalvanizing bath 1 to cause the electrolytic galvanizing bath in the electrogalvanizing bath 1 to oatmar flow.

A pair of first nozzles 8.8 and a pair of second nozzles 9.9
The electrolytic galvanizing solution injected from each of the first
The steel plate moving downward with each of the electrode plates 6,6)
The steel plate moving upward between the J-tube 5 and each of the pair of second electrode plates 7, 7) rises between the IJ-tube 5 and the electrogalvanizing bath discharge pipe. overflow through 10. The steel strip 5 moves downward and then upward in the electrogalvanizing bath 1 via a first conductor roll 2, a sink roll 3 and a second conductor roll 4, and passes through a pair of first electrode plates 6, 6 and a pair of second electrode plates 7, 7, both surfaces of the steel strip 5 are electrogalvanized.

However, the conventional device described above has the following problems. That is, between the pair of first electrode plates 6, 6 and the steel strip 5 moving downward, and
The flow rate of the electrogalvanizing bath rising between the pair of second electrode plates 7, 7 and the upwardly moving steel strip 5 is:
A pair of first nozzles 8, 8 and a pair of second nozzles 9, 9
The flow rate decreases as the distance from each of the points increases, and the flow velocity becomes non-uniform. If the flow rate of the electrolytic galvanizing bath becomes uneven in this way, unevenness will occur on the surface of the plating film formed on the surface of the steel strip 5. In particular, if the plating film is
In the case of a zinc alloy plating film such as a zinc alloy plating film, the composition of the plating film changes.

[Purpose of the invention]

Therefore, it is an object of the present invention to provide a method for displacing a steel strip between a pair of first electrode plates and a pair of second electrode plates disposed in a vertical electrogalvanizing tank and a steel strip moving in the tank. To provide an economical vertical electrogalvanizing device capable of forming a plating film having an even and uniform composition on the surface of a copper IJ tube by making the flow rate of an electrogalvanizing bath uniform. It is in.

[Summary of the invention]

The present invention provides a vertical electrogalvanizing tank for accommodating an electrogalvanizing bath, a first conductor roll disposed above the IJ tube entry side of the plating tank, and a first conductor roll disposed above the IJ tube entry side, and a sink roll disposed in the plating bath for reversing the moving direction of the steel strip upward; a second conductor roll disposed above the steel strip outlet side of the plating bath; 1 disposed between the first conductor roll and the sink roll
A pair of first electrode plates, a pair of second electrode plates disposed between the sink roll and the second conductor roll, an electrolytic galvanizing solution being supplied into the plating tank, an electrogalvanizing solution supply means for forming a flow of an electrogalvanizing bath at a predetermined flow rate between the first electrode plate and each of the pair of second electrode plates and the steel strip; For overflowing galvanizing baths.

A vertical electrogalvanizing apparatus comprising an electrogalvanizing bath discharge means provided at the upper end portion of the plating bath, the vertical electrogalvanizing bath having a first vertical passage on the copper strip inlet side and a steel strip outlet. a second vertical passage having the same cross-sectional area as the first vertical passage; and a horizontal passage for communicating the lower end of the first vertical passage with the lower end of the second vertical passage. an electrogalvanizing bath, wherein the first conductor roll is above the 41st vertical passage, and the sink roll is within the horizontal passage.

The second conductor rolls are respectively disposed above the second vertical passages, and the pair of first electrode plates are disposed between the steel strips moving downward in the first vertical passages. and the pair of second electrode plates are arranged in the first vertical passageway parallel to the steel strip;
A steel plate moving upward in the second vertical passage) I
It is arranged in the second vertical passage in parallel with the steel strip with the J-tube in between, and an electrogalvanizing solution supply pipe as an electrogalvanizing solution supplying means is arranged at the upper end portion of the second vertical passage. An electrogalvanizing bath discharge pipe serving as an electrogalvanizing bath discharging means is disposed at the upper end portion of the first vertical passage, and the uppermost end of the second vertical passage is sealed with a lid, and the uppermost end of the second vertical passage is sealed with a lid. a sealed passageway for passing the steel strip,
The present invention is characterized in that an air supply pipe is provided for pressurizing the electrogalvanizing solution supply pipe and, if necessary, the electrolytic galvanizing bath in the upper end portion of the second vertical passage.

[Structure of the invention]

Next, the apparatus of the present invention will be explained with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view showing a first embodiment of the device of the present invention. As shown in FIG. 1, a vertical electrogalvanizing tank 11 for accommodating an electrogalvanizing bath consists of a first vertical passage 12 with a rectangular cross section on the inlet side of the IJ tube, and a steel strip. A second vertical passageway 3 having a rectangular cross section on the exit side, and a first vertical passageway 12
It consists of a U-shaped electrolytic galvanizing tank including a horizontal passage 14 having a rectangular cross section and whose lower end communicates with the lower end of the second vertical passage 13.

The first vertical passage 12 and the second vertical passage 13 have the same cross-sectional area. Upper end portion 15 of first vertical passage 12
The cross-sectional area of the upper end portion 1 of the second vertical passage 13 is larger than the cross-sectional area of other parts of the first vertical passage 12.
The cross-sectional area of 6 is larger than the cross-sectional area of other parts of the second vertical passage 13. Above the first vertical passage 12, the steel strip 5 is substantially inserted downwardly into the first vertical passage 12. A first conductor roll 2 is arranged for guiding perpendicularly to and for energizing the steel strip 5.

In the horizontal passage 14 there is provided a mechanism for reversing the direction of movement of the copper strip 5 directed downwardly and substantially vertically into the first vertical passage 12 upwards and for guiding it into the second vertical passage 13. Two sink rolls 3°3 are arranged. Above the second vertical passage 13, the steel strip 5 guided into the second vertical passage 13 is guided substantially vertically upwards from the second vertical passage 13, and the steel strip 5 is energized. A second conductor roll 4 is arranged for this purpose. The copper strip 5 passes through the first conductor roll 2, the sink roll 3.3 and the second conductor roll 4.
First vertical passage 12, horizontal passage 14 and second vertical passage 1
3 in sequence.

In the first vertical passage 12, also below its upper end portion 15, a pair of first electrode plates 6.6 for electrogalvanizing both surfaces of the steel strip 5 are provided. is arranged substantially parallel to the steel strip 5, with the steel strip 5 moving downwardly in between. 2nd vertical
In the passageway 13, below its upper end portion 16, a pair of second electrode plates 7, 7 for electrogalvanizing both surfaces of the steel strip 5 are disposed upwardly in the second vertical passageway 13. (The steel strip being moved) is arranged substantially parallel to the steel strip 5 with the IJ knob 5 in between.

An electrogalvanizing solution supply pipe 17 for supplying electrogalvanizing solution into the electrogalvanizing tank 11 is disposed in the upper end portion 16 of the second vertical passage 13 . The electrogalvanizing solution supply pipe 17 has its open end 17' connected to the second vertical passage 13.
in the upper end portion 16 of the . The lower part of the electrogalvanizing solution supply pipe 17 is immersed in the electrogalvanizing bath in the upper end section 16 during operation.

An electrogalvanizing bath discharge pipe 18 is arranged in the upper end portion 15 of the first vertical passage 12 for overflowing the electrogalvanizing bath in the electrogalvanizing bath 11 . The electrogalvanizing bath discharge pipe 18 has its open end 1 B' in the upper end portion 15 of the first vertical passage 12.

The above-mentioned structure was previously developed by the present inventors using an electrode plate and a steel plate.
It was developed as a device for forming a plating film with a uniform composition on the surface of a steel strip by uniformizing the flow rate of the electrogalvanizing bath flowing between the IJ tube and the present applicant has filed a patent application (patent application). The structure is the same as that described in No. 59-159087].

The present invention has been developed as an economical device that requires less equipment cost by further improving the above-described structure.

In the present invention, the uppermost end of the second vertical passage 13 is the lid 19
The electrolytic galvanizing solution supply pipe 17
penetrates the lid 19 in a liquid-tight manner.

The lid 19 is provided with a passage 21 for passing the steel strip 5, sealed by a sealing mechanism 20.

The electrogalvanizing solution contained in a tank (not shown) is
The electrogalvanizing solution is supplied by a pump through a supply pipe 17 into the upper end portion 16 of the second vertical passage 13 . Since the uppermost end of the second vertical passage 13 is sealed by the lid 19, the electrolytic galvanizing bath supplied in this manner is filled in the electrolytic galvanizing tank 11. Then, due to the pressurizing action of the electrogalvanizing solution supplied into the upper end portion 16 of the second vertical passage 13 through the electrogalvanizing solution supply pipe 17, the electrogalvanizing bath in the plating bath 11 is
Second vertical passage 13, horizontal passage 14 and first vertical passage 1
2, and the electrogalvanizing bath discharge pipe 1.
overflow through 8. The overflowing electrogalvanizing bath is returned to a tank (not shown).

On the other hand, the steel strip 5 is attached to the first conductor roll 2. Via the sink roll 3 and the second conductor roll 4,
Opposing the above-mentioned flow of the electrogalvanizing bath, the first electrodes of 7'CI pairs are moved sequentially through the first vertical passage 12, the horizontal passage 14 and the second vertical passage 13, and are arranged in the first vertical passage 12. While passing between the plates 6, 6 and between a pair of second electrode plates 7, 7 arranged in the second vertical passage 13,
Both surfaces of the steel strip 5 are electrogalvanized.

As mentioned above, the electrogalvanizing bath is passed through the electrogalvanizing solution supply pipe 17 to the upper end portion 16 of the second vertical passage 13.
Due to the pressurizing action of the electrolytic galvanizing solution supplied within the galvanizing solution, the galvanizing solution flows sequentially through the second vertical passage 13, the horizontal passage 14 and the first vertical passage 12, and the first vertical passage 12 and the second vertical passage 13 are have the same cross-sectional area. The electrogalvanizing bath is therefore distributed between the pair of second electrode plates 7.7 arranged in the second vertical passage 13 and the upwardly moving steel strip 5 and the first vertical passage 12. The fluid flows at a uniform velocity between the pair of first electrode plates 6.6 disposed therein and the downwardly moving steel strip 5. As a result, a plating film having an even and uniform composition can be formed on both surfaces of the steel IJ tube 5.

FIG. 2 is a schematic longitudinal sectional view showing a second embodiment of the device of the present invention. The device of the second embodiment comprises a second vertical passage 1
3 is provided with an air supply pipe 22 for pressurizing the electrogalvanizing bath in the upper end portion 16 of the second vertical passage 3, together with an electrogalvanizing solution supply pipe 17. Except for this point, it is the same as the device of the first embodiment described above.

Since the apparatus of the second embodiment has the above-described structure, the electrogalvanizing bath is supplied through the electrogalvanizing solution supply pipe 17 to the extent that the upper end portion 16 of the second vertical passage 13 is not filled. By supplying an electrogalvanizing solution into the electrogalvanizing bath 11 and blowing air onto the bath surface of the electrogalvanizing bath within the upper end portion 16 from the air supply pipe 22, the plating tank 11 is The electrogalvanizing bath in the second
It flows sequentially through the vertical passage 13 , the horizontal passage 14 and the first vertical passage 12 and overflows through the electrogalvanizing bath discharge pipe 18 .

Thus, in the same manner as described for the apparatus of the first embodiment, the electrogalvanizing bath is connected to a pair of second electrode plates 7, 7 arranged in a second vertical passage 13 and to a steel plate moving upwardly. +J tube 5 and between the pair of first electrode plates 6, 6 disposed in the first vertical passage 12 and the steel strip 5 moving downward, at a uniform flow rate. It flows.

The IJ tube 5 has a pair of first electrode plates 6,
6 and between the pair of second electrode plates 7, 7, electrogalvanizing is performed. As a result, a plating film having an even and uniform composition can be formed on both surfaces of the steel strip 5.

Furthermore, in the device of the second embodiment, the air supply pipe 22
The electrogalvanizing bath in the electrogalvanizing tank 11 flows due to the pressurizing action of the air blown into the upper end portion 16 of the second vertical passage 13 from the electrolytic galvanizing bath 11. There is no need to fill the
Even if the sealing of the passage 21 for passing the IJ tube 5 is incomplete, the electrogalvanizing bath in the upper end portion 16 will not leak out from the passage 21.

〔Effect of the invention〕

As described above, according to the apparatus of the present invention.

The following excellent effects are brought about.

(1) Electrolytic zinc flowing between each of a pair of first electrode plates and a pair of second electrode plates disposed in a vertical electrogalvanizing tank and a steel strip moving in the tank. By making the flow rate of the plating bath uniform, it is possible to form a plating film with an even and uniform composition on the surface of the steel strip.

(2) pressurizing the electrogalvanizing bath in the upper end portion of the second vertical passage with an electrogalvanizing solution supplied from an electrogalvanizing bath supply pipe provided in the upper end portion;
The electrogalvanizing bath in the electrogalvanizing bath flows through the second vertical passage, the horizontal passage and the first vertical passage by pressurizing the air blown from the air supply pipe provided at the upper end portion. Therefore, the heights of the first vertical passage and the second vertical passage may be the same, and the equipment cost is low.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal sectional view showing a first embodiment of the device of the present invention, FIG. 2 is a schematic longitudinal sectional view showing the second embodiment, and FIG. 3 is a schematic longitudinal sectional view of a conventional device. . In the drawings: 1... Vertical electrogalvanizing tank, 2... First contactor roll. 3... Think roll. 4...Second contactor role. 5... Steel steel l-IJ tube% 6... First electrode plate. 7...Second electrode plate% 8...First nozzle, 9...
・Second nozzle, 10... Electrogalvanizing bath discharge pipe, 11... Vertical electrogalvanizing tank of this publication, 12.
...First vertical passage, 13...Second vertical passage, 14...
・Horizontal passage, 15.16...Top end portion, 17
...Electrogalvanizing bath supply pipe, 18...Electrogalvanizing bath discharge pipe, 19...Lid, 2o...Seal mechanism, 2
1... Passage, 22... Air supply pipe.

Claims (2)

[Claims] (1) A vertical electrogalvanizing tank for accommodating an electrogalvanizing bath, a first conductor roll disposed above the steel strip entry side of the plating tank, and a steel strip guided into the plating tank. a sink roll disposed within the plating bath for reversing the moving direction of the plating bath upward; a second conductor roll disposed above the steel strip outlet side of the plating bath; and the first conductor roll. a pair of first electrode plates disposed between the sink roll and the sink roll; a pair of second electrode plates disposed between the sink roll and the second conductor roll; and an electrolytic galvanizing solution. electrolytic zinc supplied into the plating bath to form a flow of electrogalvanizing bath at a predetermined flow rate between each of the pair of first electrode plates and the pair of second electrode plates and the steel strip; A vertical electrogalvanizing apparatus comprising a plating solution supply means and an electrogalvanizing bath discharge means provided at an upper end portion of the plating tank for overflowing the electrogalvanizing bath in the plating tank, The type electrogalvanizing tank has a first vertical passage on the steel strip entry side, a second vertical passage on the steel strip exit side having the same cross-sectional area as the first vertical passage, and a second vertical passage on the steel strip exit side, and a second vertical passage of the first vertical passage. a U-shaped electrogalvanizing bath including a horizontal passage for communicating a lower end with a lower end of the second vertical passage, the first conductor roll being above the first vertical passage, and the sink roll being above the first vertical passage; the second conductor rolls are respectively disposed within the horizontal passageway and above the second vertical passageway, and the pair of first electrode plates are moving downwardly within the first vertical passageway. is disposed in said first vertical passageway parallel to said steel strips with said steel strips therebetween;
a pair of second electrode plates are disposed in the second vertical passageway parallel to the steel strip with the steel strip moving upwardly in the second vertical passageway; An electrogalvanizing solution supply pipe serving as an electrogalvanizing solution supplying means is disposed at the upper end portion, and an electrogalvanizing bath discharge pipe serving as an electrogalvanizing bath discharging means is disposed at the upper end portion of the first vertical passage. wherein the uppermost end of the second vertical passageway is sealed by a lid, the electrogalvanizing solution supply tube passing through the lid in a liquid-tight manner, and passing the steel strip through the lid. Vertical electrogalvanizing equipment characterized in that it is provided with a sealed passage for. (2) a vertical electrogalvanizing tank for accommodating an electrogalvanizing bath; a first conductor roll disposed above the steel strip entry side of the plating tank; and a steel strip guided into the plating tank. a sink roll disposed within the plating bath for reversing the moving direction of the plating bath upward; a second conductor roll disposed above the steel strip outlet side of the plating bath; and the first conductor roll. a pair of first electrode plates disposed between the sink roll and the sink roll; a pair of second electrode plates disposed between the sink roll and the second conductor roll; and an electrolytic galvanizing solution. electrolytic zinc supplied into the plating bath to form a flow of electrogalvanizing bath at a predetermined flow rate between each of the pair of first electrode plates and the pair of second electrode plates and the steel strip; A vertical electrogalvanizing apparatus comprising a plating solution supply means and an electrogalvanizing bath discharge means provided at an upper end portion of the plating tank for overflowing the electrogalvanizing bath in the plating tank, The type electrogalvanizing tank has a first vertical passage on the steel strip entry side, a second vertical passage on the steel strip exit side having the same cross-sectional area as the first vertical passage, and a second vertical passage on the steel strip exit side, and a second vertical passage of the first vertical passage. a U-shaped electrogalvanizing bath including a horizontal passage for communicating a lower end with a lower end of the second vertical passage, the first conductor roll being above the first vertical passage, and the sink roll being above the first vertical passage; the second conductor rolls are respectively disposed within the horizontal passageway and above the second vertical passageway, and the pair of first electrode plates are moving downwardly within the first vertical passageway. is disposed in said first vertical passageway parallel to said steel strips with said steel strips therebetween;
a pair of second electrode plates are disposed in the second vertical passageway parallel to the steel strip with the steel strip moving upwardly in the second vertical passageway; An electrogalvanizing solution supply pipe serving as an electrogalvanizing solution supplying means is disposed at the upper end portion, and an electrogalvanizing bath discharge pipe serving as an electrogalvanizing bath discharging means is disposed at the upper end portion of the first vertical passage. the uppermost end of the second vertical passageway is sealed by a lid, the electrogalvanizing solution supply tube passes through the lid in a fluid-tight manner, and the lid is fitted with a steel strip. Vertical electrogalvanizing apparatus, characterized in that it is provided with a sealed passageway for passage and an air supply pipe for pressurizing the electrogalvanizing bath in the upper end portion of said second vertical passageway.