JP2011195915A - Continuous electroplating electric current-shielding device and continuous electroplating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous electroplating electric current-shielding device capable of preventing metal deposition to material other than a steel strip in an electroplating tank even in every operational conditions, and to provide a plating method of the continuous electroplating electric current-shielding device.SOLUTION: The continuous electroplating electric current-shielding device prevents metal deposition to material other than the steel strip 6 by preventing a roundabout path of current, in the continuous electroplating device where the steel strip 6 is moved continuously through a plurality of paths between electrodes 5 in an electrolytic tank 1, the electrodes 5 are energized and metal ions in an electrolyte 2 are deposited onto the steel strip 6 by plating, wherein edge masks 7 made of resin are arranged on both ends of the respective electrodes 5, sheet-like insulating curtains 10 for covering the surfaces of the electrodes 5 are disposed on the edge masks 7 and the edge masks 7 are connected to an actuator 8 to move the edge mask 7 and the insulating curtains 10.

Description

  The present invention relates to a current shielding device for continuous electroplating and a continuous electroplating method capable of preventing metal deposition other than a steel strip in an electrolytic tank under all operating conditions.

  In the electrolytic tank, the electrode and the conductor roll are energized to set the steel strip to the (−) potential and the electrode to the (+) potential, so that metal ions in the electrolytic solution are deposited on the surface of the steel strip. However, the potential may collapse locally due to stray current, etc., and a location that becomes (−) potential occurs at a location other than the steel strip (metal in the electrode or electrolytic tank), and as a result, that location (the potential is Metal ions in the electrolytic solution may be deposited on the lower part). When a metal deposits at an unexpected location, the deposited metal grows, and short-circuit defects occur on the surface of the steel strip due to contact with the steel strip. Moreover, since the deposited metal is mixed in the electrolytic solution and adheres to the surface of the steel strip, it becomes easy to generate pressing on the surface of the steel strip. Therefore, it is necessary to stop the operation and remove the deposited metal.

  Conventionally, in order to solve the above-described problem, as in Patent Document 1 and Patent Document 2, a current shielding film or a current shielding plate is provided on an edge mask, and measures are taken to electrically separate opposing electrodes. In order to prevent the potential difference between the electrodes from occurring, even when the electrode is not used, a measure is taken to keep the electrode at the (+) potential by applying a minute current. Furthermore, operational measures are taken so that there are no unused electrodes in the same electrolytic tank.

  Patent Document 1 discloses an insulating property that conceals an end portion of a steel strip according to the plate width of the steel strip in an electroplating apparatus having an electrode wider than the width of the continuously moving steel strip as shown in FIG. The present invention relates to a shielding apparatus for continuous electroplating in which a mask is moved in the plate width direction from the outside of a plating tank, and in the gap between the insulating mask and the side wall of the liquid tank, the electrodes are concealed with an insulating substance. Is.

  As shown in FIG. 7 and FIG. 8, in the manufacture of an electroplated steel sheet, in particular, a material with a differential thickness, a current is prevented from flowing in regardless of the width of the steel strip. The present invention relates to an electroplating tank having a tree tin preventing function capable of reliably preventing the occurrence of tin precipitation.

Japanese Utility Model Publication No. 60-16119 Japanese Patent Laid-Open No. 10-110291

  However, since the electrode is made of metal, it sometimes has a local (−) potential, and even if the above measures are taken, the problem of metal deposition has not been completely solved. That is, during plating work (especially during differential thickness plating), if a potential difference occurs between the electrodes due to the usage status of each electrode installed in the same electrolytic tank, the current flows to a location where the potential is low, and the steel There was a problem that metal was deposited in addition to the belt.

  The present invention has been made in view of such circumstances, and it is possible to prevent metal deposition other than the steel strip within the electrolytic tank by covering each electrode even in any operating condition. It is an object to provide a current shielding device for electroplating and a plating method thereof.

  The present invention has been made as a result of intensive studies in order to solve the above-mentioned problems, and the gist of the present invention is the following contents as described in the claims.

(1) Continuous electric power in which the steel strip 6 continuously moves through a plurality of paths between the electrodes 5 in the electrolytic tank 1, the electrode 5 is energized, and the metal ions in the electrolytic solution 2 are plated on the steel strip 6. In the plating apparatus, a current shielding apparatus for continuous electroplating that prevents current from flowing around and prevents metal deposition other than the steel strip 6, wherein a resin edge mask 7 is disposed at both ends of each electrode 5. A continuous type characterized in that a sheet-like insulating curtain 10 covering the surface of the electrode 5 is provided on the edge mask 7, and the edge mask 7 and the insulating curtain 10 are moved by connecting the edge mask 7 to an actuator 8. Current shielding device for electroplating.
(2) The continuous electroplating current shielding device according to (1), wherein a storage device for storing the insulating curtain 10 is provided at both ends of each electrode 5 in the electrolytic tank 1.
(3) In addition to the discharge surface of the electrode 5, an insulating cover 12 made of an insulating material such as plastic or nonferrous that prevents metal deposition on the electrode 5 other than the discharge surface is provided (1) or ( The current shielding apparatus for continuous electroplating as described in 2).
(4) Continuous electric power in which the steel strip 6 continuously moves through a plurality of paths between the electrodes 5 in the electrolytic tank 1, energizes the electrodes 5, and plating the steel strip 6 with metal ions in the electrolytic solution 2. In the plating apparatus, a continuous electroplating method in which current wraparound is prevented to prevent metal deposition other than the steel strip 6, and the electrode 5 that is not turned on at the time of plating is the edge mask 7 and the electrode 5. The edge mask 7 and the insulating curtain 10 of the electrode 5 that covers the entire discharge surface of the electrode 5 with the insulating curtain 10 and that is turned on during plating are adjusted to the width of the steel strip 6 by the actuator 8. A continuous electroplating method characterized by moving together.

  That is, in the current shielding apparatus for continuous electroplating according to the present invention (1), (2), and (3) that solves the above problems, the steel strip 6 has a plurality of paths between the electrodes 5 in the electrolytic tank 1. In a continuous electroplating apparatus that moves continuously, energizes the electrode 5 and the conductor roll 3 to plate the metal ions in the electrolytic solution 2 on the steel strip 6, current wraparound is prevented and the steel strip 6 is prevented. A current shielding apparatus for continuous electroplating that prevents metal deposition other than the above, wherein a resin-made edge mask 7 is disposed at both ends of each electrode 5, and the edge mask 7 covers the surface of the electrode 5. An insulating curtain 10 is provided, the edge mask 7 is connected to an actuator 8 to move the edge mask 7 and the insulating curtain 10, and the storage curtain 10 stores the insulating curtain 10 at both ends of the electrodes 5 in the electrolytic tank 1. Provided, plastics other than discharge surface of the electrode 5, the rubber lining is provided with an insulating cover 12 of insulating material of nonferrous like.

  In the plating method according to (4), which solves the above problem, the steel strip 6 continuously moves in a plurality of paths between the electrodes 5 in the electrolytic tank 1, and the electrodes 5 and the conductor rolls 3 are moved. In the continuous electroplating apparatus for plating the steel strip 6 with the metal ions in the electrolyte 2, the continuous electroplating prevents the current from wrapping around and prevents the deposition of metal other than the steel strip 6. In the method, the power is not turned on during plating (not used). The edge mask 7 of the electrode 5 and the insulating curtain 10 cover the entire discharge surface of the electrode 5 and the power is turned on (used). The edge mask 7 of the electrode 5 and the insulating curtain 10 are moved in accordance with the width of the steel strip 6 by the actuator 8 so that the usage state of each electrode 5 can be obtained under all operating conditions. The thereby enabling the setting of edge mask 7 and the insulating curtain 10 according to the.

  By preventing the precipitation of metal other than the steel strip in the electrolytic tank, we aim to improve quality by preventing short-circuit flaws and pressing on the steel strip, and to improve the basic unit by preventing the deposition of metal at unnecessary locations. It becomes possible.

Moreover, since it is not necessary to apply a minute current even to an unused electrode, the operation cost can be suppressed.
Furthermore, it is not necessary to cope with operation so that there is no unused electrode in the same electrolytic tank.

It is a front view in the case of a vertical electrolytic tank, showing an embodiment of the present invention. It is a top view of FIG. FIG. 2 is a side view of one pass side of FIG. 1. FIG. 2 is a perspective view of one side of FIG. 1. It is a figure which shows the usage method according to the operating condition of this invention. It is an elevation view of the shielding apparatus of patent document 1. It is conceptual structure explanatory drawing in the case of electroplating the wide steel strip of the electroplating tank which has a tree tin prevention function which concerns on one embodiment of patent document 2. FIG. It is conceptual structure explanatory drawing in the case of electroplating the narrow steel strip of the electroplating tank which has a tree tin prevention function based on one Embodiment of patent document 2. FIG.

  The overall configuration of a current shielding device for continuous electroplating having a function of preventing precipitation of metals other than the steel strip 6 according to the optimum embodiment of the present invention will be described. The steel strip 6 continuously moves through a plurality of paths between the electrodes 5 in the electrolytic tank 1, energizes the electrode 5 and the conductor roll 3, and plating the metal ions in the electrolytic solution 2 onto the steel strip 6. Resin edge masks 7 are arranged at both ends of each electrode 5. The edge mask 7 is provided with a sheet-like insulating curtain 10 covering the surface of the electrode 5, and moves while being connected to the actuator 8. In addition, a storage device for storing the insulating curtain 10 is provided at both ends of each electrode 5 in the electrolytic tank 1, and the insulating curtain 10 is discharged and stored in accordance with the movement of the edge mask 7. In addition to the discharge surface of the electrode 5, an insulating cover 12 made of an insulating material such as plastic, rubber lining, or non-ferrous is provided.

  The continuous electroplating current shielding apparatus and plating method of the present invention can be applied to either a vertical electrolytic tank or a horizontal electrolytic tank.

  FIGS. 1 to 4 show a case where a continuous electroplating current shielding device having a function of preventing metal deposition other than a steel strip in an electrolytic tank according to an embodiment of the present invention is applied to a vertical electrolytic tank. This will be described below with reference. As shown in FIGS. 1, 2, and 3, the steel strip 6 continuously moves through a plurality of paths between the electrodes 5 in the electrolytic tank 1, energizes the electrodes 5 and the conductor rolls 3, In a continuous electroplating apparatus for plating metal ions on a steel strip 6, resin edge masks 7 are arranged at both ends of each electrode 5. The edge mask 7 is connected to a rod 9, and the rod 9 is connected to an actuator 8. These actuators 8 move independently according to the width of the steel strip 6.

  The edge mask 7 is provided with a sheet-like insulating curtain 10 that covers the surface of the electrode 5. In addition, storage reels 11 for storing the insulating curtain 10 are provided at both ends of each electrode 5 in the electrolytic tank 1, and the insulating curtain 10 is discharged and stored as the edge mask 7 moves. As shown in FIG. 4, the storage reel 11 is provided with a tensioning device (such as a motor) 13 that always applies tension in the insulating curtain 10 storage direction (Z direction). Alternatively, a wire is connected from the outside of the electrolytic tank, and a tension is always applied in the insulating curtain 10 housing direction (Z direction). Alternatively, the storage reel 11 and the rod 9 portion have a rack and pinion structure. In addition to the discharge surface of the electrode 5, an insulating cover 12 made of an insulating material such as plastic, rubber lining, or non-ferrous metal is provided.

  In addition, a plating method for preventing metal deposition outside the steel strip in the electrolytic tank will be described below with reference to FIG. As shown in FIG. 5, during normal use (CASE 1), the edge mask 7 and the insulating curtain 10 arranged at both ends of the electrode 5 are made of the steel strip 6 by the actuator 8 in the same manner as the conventional edge mask. Edge overcoat is prevented by moving according to the width.

  Next, when not in use (CASE 2), the edge mask 7 of WS and DS is moved to the center of the electrode 5 and the discharge surface of the electrode 5 is covered with the edge mask 7 of the electrode 5 and the insulating curtain 10 and is not used. Metal deposition on the discharge surface of the electrode 5 is prevented. At the time of differential thickness plating (CASE 3), the electrode 5 which is not turned on (not used) moves the WS and DS edge mask 7 to the center of the electrode 5 and the electrode 5 is formed by the edge mask 7 and the insulating curtain 10. The edge mask 7 and the insulating curtain 10 of the electrode 5 that covers all the discharge surfaces 5 and turns on (uses) the power are moved by the actuator 8 in accordance with the width of the steel strip 6. This prevents metal deposition on the unused electrode 5 in one pass and allows the edge mask 7 of the used electrode 5 to move in accordance with the width of the steel strip 6 to prevent edge overcoat. .

  That is, according to the present invention, the edge mask 7 and the insulating curtain 10 can be set according to the usage state of each electrode 5 in the same electrolytic tank 1 under all operating conditions. Accordingly, it is possible to prevent the metal from being deposited on the electrolytic tank 1 other than the steel strip 6.

1: Electrolytic tank 2: Electrolytic solution 3: Conductor roll 4: Sink roll 5: Electrode 6: Steel strip 7: Edge mask 8: Actuator 9: Rod 10: Insulating curtain 11: Storage reel 12: Insulating cover 13: Tensioning device 14 : Insulating shielding film 15: first current shielding plate 16: second current shielding plate 17: side wall

Claims (4)

  In a continuous electroplating apparatus in which the steel strip 6 continuously moves through a plurality of paths between the electrodes 5 in the electrolytic tank 1, the electrode 5 is energized, and the metal ions in the electrolyte 2 are plated on the steel strip 6. A current shielding device for continuous electroplating that prevents current from flowing around and prevents metal deposition other than the steel strip 6, wherein resin edge masks 7 are arranged at both ends of each electrode 5, A sheet-like insulating curtain 10 covering the surface of the electrode 5 is provided on the mask 7, and the edge mask 7 and the insulating curtain 10 are moved by connecting the edge mask 7 to an actuator 8. Current shielding device.   The current shielding device for continuous electroplating according to claim 1, wherein a housing device for housing the insulating curtain 10 is provided at both ends of each electrode 5 in the electrolytic tank 1.   3. An insulating cover 12 made of an insulating material such as plastic or non-ferrous that prevents metal deposition on the electrode 5 other than the discharge surface is provided in addition to the discharge surface of the electrode 5. The current shielding apparatus for continuous electroplating as described. In a continuous electroplating apparatus in which the steel strip 6 continuously moves through a plurality of paths between the electrodes 5 in the electrolytic tank 1, the electrode 5 is energized, and the metal ions in the electrolyte 2 are plated on the steel strip 6. A continuous electroplating method in which current wraparound is prevented and metal deposition other than the steel strip 6 is prevented, and the electrode 5 that is not turned on during plating is the edge mask 7 of the electrode 5 and the insulating curtain. The edge mask 7 and the insulating curtain 10 of the electrode 5 that covers the entire discharge surface of the electrode 5 at 10 and turns on the power during plating are moved according to the width of the steel strip 6 by the actuator 8. A continuous electroplating method characterized in that:

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