JP4505113B2 - Strip metal electrolytic treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrolytic treatment apparatus for performing strip metal cleaning, electroplating, or the like.
[0002]
[Prior art]
Conventionally, a strip metal subjected to hot rolling and cold rolling is plated with zinc, tin, nickel, or the like on the surface according to the use such as building materials and automobiles.
A horizontal electrolysis apparatus or a vertical electrolysis apparatus is used for the plating treatment on the band-shaped metal, but a vertical electrolysis apparatus is often employed from the viewpoint of downsizing the equipment and increasing the speed of the sheet passing plate.
In this vertical electrolysis apparatus, as shown in FIG. 4, conductor rolls 22 and 23 for guiding a strip metal (thin steel plate) 29 are arranged on both sides above an electrolytic treatment tank 21 in which an electrolytic solution 20 is placed. A sink roll 24 is disposed inside the processing tank 21, and the band-shaped metal 29 is guided from the entrance-side conductor roll 22 to the sink roll 24, passes out of the system through the conductor roll 23, and is conveyed to the next process. Is done.
In the electrolytic treatment tank 21 containing the electrolytic solution 20, a pair of electrode plates 25, 26 are arranged with a band-shaped metal 29 sandwiched between a conductor roll 22 and a sink roll 24 on the normal entry side, and the sink roll 24 and the outlet side are disposed. A pair of electrode plates 27, 28 sandwiching the band-shaped metal 29 is also disposed between the conductor rolls 23, and the distance between the electrodes and the band-shaped metal 29, the current value, etc. are adjusted, so that the surface of the band-shaped metal 29 is uniform. Electrolytic treatment is performed so as to be plated.
However, since the strip metal 29 is displaced between the electrodes due to the warp or vibration of the strip metal 29 in the width direction, the non-uniform flow of the electrolyte 20, etc., the amount of plating in the width direction of the strip metal 29 varies. However, there are problems such as a decrease in product value and an increase in alloy cost accompanying an increase in the plating amount (weight per unit area).
As a countermeasure against this, as described in Japanese Patent Application Laid-Open No. 58-123898, a plating solution whose pressure is increased by a pump is ejected between an electrode plate and a strip metal, and the strip metal and the electrode are formed by the pressure of the ejected plating solution. It is practiced to prevent the plate from contacting and promote the diffusion of metal ions to the plated surface.
Furthermore, as described in Japanese Utility Model Laid-Open No. 5-69167 and Japanese Utility Model Laid-Open No. 5-96068, a groove is provided in the upper part of the electrode plate to conduct in the thickness direction of the electrode plate. By stabilizing the supplied plating solution, the plating amount (weight per unit area) is made uniform in the width direction on the band-shaped metal.
Further, as described in Japanese Utility Model Laid-Open No. 5-62575, on the upper part of the electrode plate suspended from the surface of the plating solution so as to face the band metal traveling in the electrolytic treatment tank of the vertical electrolysis apparatus, By providing a notch for circulating the plating solution in the range of the width direction, the rise of the plating solution (liquid head-up) due to the high-speed pulling of the strip metal is suppressed, and the strip metal position between the electrode plates The amount of plating in the width direction of the band-shaped metal is made uniform by preventing the shift.
[0003]
[Problems to be solved by the invention]
However, the method described in Japanese Patent Application Laid-Open No. 58-123898 requires the installation of a pump for boosting the plating solution and a special electrode plate, which requires a significant modification of the apparatus and increases the equipment cost. Moreover, it is not possible to reliably prevent the deviation between the strip-shaped metal electrode plates generated when the strip-shaped metal is attracted to the plating solution flow formed along with the rotation of the sink roll.
Furthermore, when the vertical electrolysis apparatus described in Japanese Utility Model Laid-Open No. 5-69167, Japanese Utility Model Laid-Open No. 5-96068, Japanese Utility Model Laid-Open No. 5-62575 is used, the band metal passing between the electrode plates is pulled up. Although it is possible to suppress the rise of the plating solution surface, the strip metal is attracted to the flow of the plating solution formed in the rotation direction of the sink roll, and the distance between the strip metal and the electrode plate varies. In particular, when there is a plate warp, even if the applied voltage is adjusted, the amount of plating attached to the surface of the strip metal varies.
In addition, since the electrode plate is notched, the current cross-sectional area decreases, the heat generation during energization due to Joule heat increases, the temperature of the electrode plate and the plating solution rises, and the temperature of the plating solution is kept constant. There are problems such as an increase in the load of the cooling device and a change in the amount of plating adhesion.
[0004]
The present invention has been made in view of such circumstances, and eliminates the deviation between the electrode plates of the band-shaped metal, suppresses fluctuations in the amount of plating, and improves the quality of the product and reduces the cost of the plating alloy. An object is to provide a metal electrolytic treatment apparatus.
[0005]
[Means for Solving the Problems]
In the strip metal electrolysis apparatus according to the first aspect of the present invention, a sink roll for guiding the strip metal is provided in the electrolytic cell containing the electrolytic solution, and on each of the entrance side and the exit side of the sink roll, In the electrolytic processing apparatus in which a pair of electrode plates is arranged with the strip metal interposed therebetween, the electrode plate on the sink roll side of the pair of electrode plates arranged on the outlet side of the sink roll is longer than the other electrode plates , It has an extension that blocks the flow of electrolyte .
As a result, the flow toward the inside of the electrolytic solution (plating solution) accompanying the rotation of the sink roll in the electrolytic bath can be blocked by the electrode plate on the sink roll side (inner side), and the strip metal is on the inner electrode plate side. Can be prevented.
[0006]
Furthermore, in the strip metal electrolysis apparatus according to the second aspect of the present invention, the sink roll for guiding the strip metal is provided in the electrolytic cell containing the electrolytic solution, and each of the entrance side and the exit side of the sink roll is provided. In addition, in the electrolytic processing apparatus in which a pair of electrode plates is arranged with the band metal interposed therebetween, the pair of electrode plates arranged on the outlet side have the same length, and the electrode plate on the sink roll side of the electrode plates Is provided with a blocking plate for suppressing the flow of the electrolyte.
Since the shielding plate is connected to the lower end of the electrode plate, it is possible to suppress the deviation of the band-shaped metal due to the flow toward the inside of the electrolyte accompanying the rotation of the sink roll. And since the electrode plate which acts on the electrolytic treatment of a strip | belt-shaped metal is made into the same length, the plating amount to a strip | belt-shaped metal can be made uniform.
[0007]
Furthermore, the blocking plate is preferably formed from an insulating material.
Thereby, the flow of the electrolyte can be suppressed, and at the same time, the amount of plating on the strip metal can be made stable and uniform.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
FIG. 1 is an overall view of a strip metal electrolysis apparatus according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of an electrode plate having a shield plate according to a modification of the electrolysis apparatus, and FIG. It is a schematic diagram showing the flow of the electrolyte solution of a processing apparatus.
As shown in FIG. 1, a strip-shaped metal electrolytic treatment apparatus 10 according to an embodiment of the present invention has a steel electrolytic cell 12 containing a Sn solution 11, which is an example of an electrolytic solution, and includes a strip-shaped metal. In order to guide the thin steel plate 13, which is an example, into the electrolytic cell 12, conductor rolls 14 and 16 and a sink roll 15 connected to a driving source (not shown) are provided.
Further, between the conductor roll 14 arranged on the entry side of the thin steel plate 13 and the sink roll 15 arranged inside the electrolytic cell 12 above the electrolytic cell 12, the thin steel plate 13 is sandwiched and connected to a power supply device (not shown). The pair of electrode plates 17a and 17b is disposed, and the conductor roll 16 and the sink roll 15 disposed on the outlet side of the thin steel plate 13 above the electrolytic cell 12 are connected to the power supply device with the thin steel plate 13 interposed therebetween. A pair of electrode plates 18a and 18b is provided.
The electrode plates 17a and 17b have the same dimensions in a range of 1500 to 1800 mm in length and 1200 to 1500 mm in width. The electrode plates 18a and 18b have the same width in the range of 1200 to 1500 mm, but the length is the electrode plate 18a provided on the sink roll 15 side (inner side), and the electrode plate 18b (length of 1500 to 1800 mm). The length is 100 to 270 mm.
[0009]
Next, the operation of the strip metal electrolysis apparatus according to the embodiment of the present invention will be described.
The entrance-side conductor roll 14, the sink roll 15, and the exit-side conductor roll 16 are rotated to convey the thin steel plate 13 into the electrolytic cell 12 containing the Sn solution 11 at a speed of approximately 400 to 600 m / min.
When the thin steel plate 13 conveyed into the electrolytic cell 12 passes between the pair of electrode plates 17a and 17b provided on the entrance side of the sink roll 15, the Sn solution 11 is caused by the current flowing through the electrode plates 17a and 17b. Inside Sn is deposited on the surface of the thin steel plate 13 and plated.
Further, the thin steel plate 13 whose direction has been changed by the sink roll 15 is between the inner electrode plate 18a having an extension portion 19 of 100 to 270 mm provided on the outlet side of the sink roll 15 and the electrode plate 18b having a normal length. The surface of the thin steel plate 13 is plated by the same action as the electrode plates 17a and 17b described above.
The thin steel plate 13 may be warped in the plate width direction. When passing through the electrode plates 17a and 17b and the electrode plates 18a and 18b, the current value is adjusted in consideration of the warpage, and the thin steel plate 13 13, the variation in the plating amount in the width direction is reduced.
[0010]
However, as shown in FIG. 3, since the sink roll 15 is rotating in the direction of the arrow (dotted line in the figure), the flow of the Sn solution 11 accompanying this rotation direction (dotted line arrow in the figure) is generated. .
Therefore, by blocking this flow by the extension 19 of the electrode plate 18a, the inward flow generated with the rotation of the sink roll 15 can be minimized, and the thin steel plate 13 is drawn toward the electrode plate 18a. Can be prevented.
As a result, the flow toward the electrode plate 18a and the electrode plate 18b is equalized, and the thin steel plate 13 is close to the electrode plate 18a due to the influence of the warp of the thin steel plate 13, the flow of the Sn solution 11 and the like. And can prevent contact.
Further, the surface of the thin steel plate 13 that has been passed through with a small variation in the distance between the electrode plates 18a and 18b is subjected to uniform Sn plating, and variations in the amount of Sn plating per unit area are reduced, resulting in product quality. And the plating alloy cost can be reduced, and the operation can be stabilized.
Furthermore, since the electrode plates 18a and 18b are not subjected to specific processing (grooves or the like), the temperature rise of the Sn solution 11 and the electrode plates 18a and 18b is suppressed, and the load of the Sn solution 11 cooling device is reduced. Can do.
[0011]
Next, an electrode plate 18c, which is a modification of the electrode plate 18a of the strip metal electrolysis apparatus according to the present embodiment, will be described.
As shown in FIG. 2, the electrode plate 18 c is arranged in the electrolytic cell 12 so as to be paired with the electrode plate 18 b instead of the electrode plate 18 a having the extension 19. The electrode plate 18c has the same width and length as the electrode plate 18b, and a blocking plate 19a is provided at the lower end. The shielding plate 19a has a length of 100 to 270 mm, and is fixed to a supporting member (not shown) attached to the lower end of the electrode plate 18c by commonly used fastening means such as bolts and nuts.
As a result, the flow toward the electrode plate 18c and the electrode plate 18b is equalized, and the thin steel plate 13 approaches the electrode plate 18c due to the influence of the warp of the thin steel plate 13, the flow of the Sn solution 11 and the like. And can prevent contact.
And Sn plating applied to the surface of the passed thin steel plate 13 can be made uniform, and the variation of Sn plating amount can be suppressed and the operation can be stabilized.
In particular, since the electrode areas on both sides acting on the thin steel plate 13 can be made equal, fluctuations in the plating amount due to the difference in the length of the electrode plate can be eliminated, and a more preferable result can be obtained.
The material used for the shielding plate 19a can be an insulating material such as acrylic, ceramic, vinyl chloride, FRP, or the like.
The strip metal electrolysis apparatus of the present invention uses an Sn plating solution as an electrolytic solution, but for other electrolytic treatments such as Zn plating, Ni plating, and Zn-based alloy plating, or electrolytic degreasing and electrolytic cleaning. Can be applied.
[0012]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, in addition to the thin steel plate, an aluminum steel plate, a copper plate, or the like can be used for the electrolytic treatment as the strip metal.
Further, the shield plate can be attached integrally to the electrode by attaching a support member to the electrode in advance and incorporating the shield plate into the support member.
[0013]
【The invention's effect】
Electrolytic treatment apparatus of metal band according to claim 1 Symbol placement is a sink roll to guide the metal band provided in the electrolytic bath containing an electrolytic solution, each of the inlet side and outlet side of the sink roll, across the metal band In the electrolytic processing apparatus in which a pair of electrode plates is arranged, the sink roll side electrode plate of the pair of electrode plates arranged on the outlet side of the sink roll is made longer than the other electrode plates. By eliminating the deviation of the strip metal due to the flow of the accompanying electrolyte, it is possible to suppress variations in the amount of plating, reduce plating alloy, improve product quality, and perform stable operation.
[0014]
The strip metal electrolysis apparatus according to claim 2 or 3 , wherein a sink roll for guiding the strip metal is provided in an electrolytic cell containing an electrolytic solution, and the strip metal is sandwiched between the entrance side and the exit side of the sink roll. In the electrolytic processing apparatus in which a pair of electrode plates are arranged in the electrode plate, the pair of electrode plates arranged on the outlet side have the same length, and the electrode plate on the sink roll side of the electrode plates is blocked to suppress the flow of the electrolyte. Since the plate is provided, the flow toward the inside of the electrolytic solution can be suppressed with a simple structure, and the amount of plating on the strip metal can be made uniform.
[0015]
Particularly, in the strip metal electrolytic treatment apparatus according to claim 3, since the shield plate is made of an insulating material, the flow of the electrolyte is suppressed, and at the same time, the amount of plating on the strip metal is made more uniform, and the product quality and operation are stabilized. Sex etc. can be improved more.
[Brief description of the drawings]
FIG. 1 is an overall view of a strip metal electrolytic treatment apparatus according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of an electrode plate to which a shielding plate according to a modification of the electrolytic treatment apparatus is attached.
FIG. 3 is a schematic diagram showing a flow of an electrolytic solution of the electrolytic treatment apparatus.
FIG. 4 is an overall view of a vertical electrolyzer according to a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10: Electrolytic processing apparatus, 11: Sn solution, 12: Electrolysis tank, 13: Thin steel plate, 14: Conductor roll, 15: Sink roll, 16: Conductor roll, 17a: Electrode plate, 17b: Electrode plate, 18a: Electrode Plate, 18b: electrode plate, 18c: electrode plate, 19: extension, 19a: blocking plate

Claims (3)

In an electrolytic treatment apparatus in which a sink roll for guiding a strip metal is provided in an electrolytic cell containing an electrolyte, and a pair of electrode plates are disposed on both the entrance side and the exit side of the sink roll with the strip metal interposed therebetween, Of the pair of electrode plates disposed on the outlet side of the sink roll, the electrode plate on the sink roll side is longer than the other electrode plates , and has an extension portion that blocks the flow of the electrolyte solution. A strip metal electrolytic treatment device.   In an electrolytic treatment apparatus in which a sink roll for guiding a strip metal is provided in an electrolytic cell containing an electrolyte, and a pair of electrode plates are disposed on both the entrance side and the exit side of the sink roll with the strip metal interposed therebetween, The pair of electrode plates arranged on the outlet side have the same length, and a blocking plate for suppressing the flow of the electrolytic solution is provided on the electrode plate on the sink roll side of the electrode plates. Strip metal electrolytic treatment equipment.   3. The strip metal electrolysis apparatus according to claim 2, wherein the blocking plate is made of an insulating material.

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