JPH0140920B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrolytic treatment apparatus for continuously electrolytically treating metal strips, and particularly to an electrolytic treatment apparatus in which the electrode spacing can be adjusted.

(Prior Art) For the electrolytic treatment of metal strips, such as electrolytic plating, pickling, degreasing or stripping of deposited metal, there is an electrolytic treatment tank through which the metal strip runs, and a tank that covers the surface of the metal strip. An electrolytic treatment apparatus is used which includes a pair of plate electrodes arranged in an electrolytic treatment tank. In such devices, adjustment of the interval between the plate electrodes is an important operating condition from the viewpoint of productivity, power consumption, and product quality.

An apparatus disclosed in Japanese Patent Publication No. 59-15996 is known as an electrolytic treatment apparatus equipped with electrode spacing adjustment means. In this device, the electrode holding plate is made movable by expanding and contracting a flexible tube having a pressurized fluid supply system, thereby making the electrode spacing variable.

(Problems to be Solved by the Invention) In the conventional device described above, the flexible tube is always in the electrolyte because it also serves as a seal for the electrolyte. Therefore, flexible tubes are limited in materials and have a short lifespan, requiring frequent replacement. Further, in order to adjust the electrode spacing steplessly, it is necessary to use an incompressible fluid as an adjustment device or to use an intermediate stopper with a complicated mechanism. Therefore, the structure of the device has become complicated, and maintenance has been time consuming.

(Means for Solving the Problems) The electrolytic treatment apparatus of the present invention includes an electrolytic treatment tank through which a metal strip runs, and a pair of plates arranged in the electrolytic treatment tank so as to cover the surface of the metal strip. It is equipped with a shaped electrode. Further, this device includes a pedestal, an electrode support member, an electrode displacement device, a flexible plate, and a seal retention device.

In the above device, the electrode support members are attached to the pedestal so as to be freely displaceable in a direction perpendicular to the surface of the metal strip, and each support an electrode.

The electrode displacement device is comprised of a jack or a fluid cylinder, and drives the electrode support member to displace the electrodes so as to provide a required electrode spacing.

The flexible plate is made of a flexible material such as rubber, and forms a part of the electrolytic treatment tank, such as a side wall or an intermediate portion between the electrode and the side wall.

Further, the seal holding device is made of a flexible material such as rubber and constantly presses the seal member against the end of the side wall of the electrolytic treatment tank or the end of the electrode support member using a spring or the like.

(Function) A metal strip runs through an electrolytic treatment tank filled with electrolyte. When passing between the pair of plate-shaped electrodes in the electrode treatment tank, electrolytic treatment such as plating is performed.

Each electrolytic support member is displaced by an electrode displacement device to adjust the electrode spacing to a required spacing. At this time, the flexible plate forming a part of the electrolytic treatment tank expands and contracts in accordance with the displacement of the electrode. At the same time, the seal member is automatically pressed against the end of the side wall of the electrolytic treatment tank or the end of the electrode support member by the seal holding device. Therefore, even if the electrode spacing changes, the seal of the electrolytic treatment tank is maintained.

(Embodiment) FIGS. 1 and 2 show an embodiment of the electrolytic treatment apparatus of the present invention.

The electrolytic treatment apparatus mainly includes a frame 1, an electrolytic treatment tank 7, an electrode 13, an electrode support member 15, an electrode displacement device 25, a seal holding device 35, and an electrolyte supply device 5.
3. It consists of a power supply roll 61 and an electrolyte recovery tank 63.

The frame 1 is made up of a support 2, a beam 3 spanning the support 2 so as to cross the strip S, and a girder 4 spanning the beam 3 so as to extend along the traveling direction of the strip S.

The electrolytic treatment tank 7 is equipped with front and rear walls 8 and side walls 9, and the top and bottom walls are made up of electrodes 13, which will be described below. The electrolytic treatment tank 7 has a box shape as a whole, and the front and rear walls 8 are respectively provided with a metal strip inlet and an outlet (none of which are shown). The electrolytic treatment tank 7 is supported on the floor by a pedestal 1.

The electrodes 13 have a rectangular plate shape, and are arranged in pairs facing each other so as to cover the upper and lower surfaces of the metal strip S. Further, conductive bands (not shown) for power supply are connected to the electric electrodes 13, respectively, and power is supplied from a power supply device (not shown) via the conductive bands.

The electrode support member 15 consists of an upper frame 17 and a lower frame 19, and the upper electrode 13 is attached to the lower end of the upper frame 17, and the lower electrode 13 is attached to the upper end of the lower frame 19 via a gasket 21. It is being Gasket 21 prevents electrolyte E from leaking from electrolytic treatment tank 7.

The electrode displacement device 25 includes a screw jack 26, and the upper frame 17 and the lower frame 19 are connected to the pillars 2 and beams 3 of the pedestal 1 via the screw jacks 26.
Each is supported on the top. Further, the screw jack key 26 is driven by a motor 28 with a reduction gear via a chain transmission device 27, and the screw jack key 26 is driven by a motor 28 with a reduction gear.
7 and the lower frame 19 are moved up and down, respectively, to displace the electrodes 13 to a required spacing.

The flexible plate 31 has an upper rubber plate 32 and a lower rubber plate 3.
3, each consisting of an upper and a lower frame 1
7 and 19 and the side wall 9 of the electrolytic treatment tank 7, and extends along the side wall 9. Further, one of the side ends of the upper rubber plate 32 and the lower rubber plate 33 is connected to the upper and lower frames 17 and 19, respectively.
The other side end is connected to a seal retaining device which will be described later. Therefore, the upper rubber plate 32 and the lower rubber plate 33 are part of the electrolytic treatment tank 7, that is, the electrode 13
and the side wall 9.

The seal holding device 35 includes upper and lower gasket pressing mechanisms 36 and 37. The upper and lower gasket pressing mechanisms 36 and 37 each consist of four sets.
As shown in the figure, they are arranged along the strip feeding direction. The upper gasket pressing mechanism 36 is attached to the upper frame 17 of the electrode support member 15, and the lower gasket pressing mechanism 37 is attached to the side wall 9. The upper and lower gasket pressing mechanisms 36 and 37 are equipped with a lever 39 that is swingable about a horizontal axis, and a gasket 41 made of a flexible material such as rubber is attached to the tip of the lever 39. On the other hand, a pressing spring mechanism 43 is attached to the upper fly 17 and the side wall 9 via pin joints 45, respectively. A pressing spring mechanism 43 is connected to the rear end of the lever 39 via a pin joint 47.

Note that the upper rubber plate 3 is located near the tip of the lever 39.
2 and the side ends of the lower rubber plate 33 are fixed.
Further, a leakage liquid collection gutter 51 is arranged below the seal holding device 35. The leakage liquid collection gutter 51 collects the electrolyte E leaked from the seal portion and other parts.

The electrolyte supply device 53 includes a header 54 and an electrolyte supply pipe 55. The electrode 13 is divided into an inlet side and an outlet side at intervals in the strip running direction, and the electrolyte supply pipe 55 is connected to open between the two sides.
An electrolytic solution is supplied into the electrolytic treatment tank 7 from a header 54 via an electrolytic solution supply pipe 55 .

The power supply rolls 61 form an upper and lower pair, and the electrolytic treatment tank 7
metal strips are disposed adjacent to the inlet and outlet, respectively.

Electrolyte recovery tanks 63 are placed at the inlet and outlet of the metal strip, respectively. An electrolyte recovery tank 63 is provided at least between the metal strip inlet and outlet and the power supply roll 61 so as to recover electrolyte E leaking from the metal strip inlet and outlet or from the leakage liquid recovery gutter 51. It is being

In the apparatus configured as described above, the gap between the electrodes 13 is set in advance according to the electrolytic treatment conditions before electrolytic treatment such as plating. That is, the motor 28 with a speed reducer is driven, and the upper and lower frames 17, 19 are raised and lowered by the screw jack 26 to adjust the electrode spacing to a required spacing. At this time, the lower rubber plates 32 and 33, which form part of the electrolytic treatment tank 7, expand and contract in accordance with the displacement of the electrode 13. At the same time, the upper pressing spring mechanism 43
1 to the end of the side wall 9 of the electrolytic treatment tank, and the lower pressing spring mechanism 43 automatically presses the gasket 41 to the end of the lower frame 19 of the electrode support member to maintain the seal of the electrolytic treatment tank. Therefore, even if the electrode spacing changes, the seal of the electrolytic treatment tank is maintained.

A metal strip S runs inside an electrolytic treatment tank 7 filled with an electrolytic solution E. When passing between the upper and lower pair of plate-shaped electrodes 13 in the electrolytic treatment tank 7, electrolytic treatment such as plating is performed.

FIG. 3 is a second embodiment of the present invention, which is a longitudinal sectional view of a part of an electrolytic treatment tank. In the following description, the same members as in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

As shown in the drawing, the side wall 9 of the electrolytic treatment tank 7 is supported by a pedestal 1. A pressing spring mechanism 65 is attached to the upper frame 17 and the side wall 9 of the electrode support member 15, respectively. A gasket 41 is attached to one end of each pressure spring mechanism 65 via a gasket seat 66. gasket 4
1 is pressed against one end of the side wall 9 and one end of the lower frame 19 by a pressing spring mechanism 65. In addition, rubber plates are provided between the upper gasket seat 66 and the upper frame 17 and between the side wall 9 and the lower gasket seat 66 so that the rubber plates 32 and 33 form a part of the electrolytic treatment tank 7. 32 and 33 are connected. In this embodiment as well, the screw jacks of the electrode displacement device are attached to the upper and lower frames 17 and 19, respectively, but these are omitted in FIG. 3.

FIG. 4 shows a third embodiment of the invention, which is an example of a device in which the strip S runs vertically. As shown in this drawing, the electrode support member 15
The left and right frames 17 and 19 are supported by the pedestal 1 via an electrode displacement device 25 consisting of a screw jack 26 and a motor 28 with a speed reducer, respectively.

A pair of bell cranks 6 are attached to the bracket 5 of the frame 1.
9 are coaxially attached. A gasket 41 is attached to the tip of each bell crank 69 via a gasket seat 66, and a pressure spring 71 can be provided between the rear end and the frame 1. The left and right bell cranks 69 are rotated by the pressing spring 71 in accordance with the displacement of the electrode 3. As a result, gasket 4
1 is pressed against one end of the left and right frames 17 and 19 to keep the electrolytic treatment tank 7 sealed. Also,
The tips of the left and right bell cranks 69 are connected by a rubber plate 73 so that the rubber plate 73 forms a part of the electrolytic treatment tank 7 .

FIG. 5 shows a fourth embodiment of the invention, which is an example of a device in which the strip S runs vertically. As shown in this drawing, the electrode support member 15
The left and right frames 17 and 19 are supported on the pedestal 1 via a screw jack 26 and a motor 28 with a speed reducer, respectively, and an electrode displacement device 25.

A pair of pressure springs 71 are attached to the bracket 5 of the mount 1, and a gasket 41 is attached to the tip of each pressure spring 71 via a gasket seat 66. The gasket 41 is the pressure spring 7
1 is pressed against one end of the left and right frames 17 and 19 to maintain the seal of the electrolytic treatment tank 7. Further, the left and right gasket seats 66 are connected by a rubber plate 73 so that the rubber plate 73 forms a part of the electrolytic treatment tank 7.

The present invention is not limited to the above embodiments; for example, a hydraulic jack may be used in place of the screw jack of the electrode displacement device, and the flexible plate may be made of flexible plastic.

(Effect of the invention) With this invention, the following effects can be obtained.

(a) Since the electrolytic displacement device does not use a flexible tube with a short lifespan, parts such as tubes do not need to be replaced, and maintenance efforts are significantly reduced.

(b) Since a screw jack or a hydraulic jack can be used as the electrode displacement device, the electrode spacing can be continuously adjusted with a simple mechanism, and various drive devices such as electric and hydraulic can be used.

C. The structure of the device is simplified.

(d) Since the drive device for the electrode displacement device can be installed outside the electrolytic treatment device, accidents caused by the drive device due to the electrolyte are eliminated.

In addition, in the case of an apparatus in which the strip runs horizontally, the sealing between the lower electrode and the lower frame can be performed inside the side wall of the electrolytic treatment tank. Therefore, the lower electrode can be removed without interfering with the side wall, making it easier to replace the electrode. Additionally, by simply placing the upper electrode support member on the side wall or electrode and the lower electrode on the lower electrode support member, a seal can be created between these members, making it easy to attach and remove the electrodes. Summer.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, in which a side view of an electrolytic treatment apparatus, FIG. 2 a front sectional view of a part of the apparatus shown in FIG. 1, and FIGS. 3 to 5 respectively. It is a sectional view of a part of an electrolytic treatment apparatus, showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Frame, 7... Electrolytic treatment tank, 13... Electrode, 15... Electrode support member, 21, 41... Gasket, 25... Electrode displacement device, 31... Flexible plate, 35... Seal holding Device, 53... Electrolyte supply device, 61... Power supply roll, 63... Electrolyte recovery tank, E... Electrolyte, S... Metal strip.

Claims (1)

[Claims] 1. A frame, an electrolytic treatment tank through which a metal strip runs, a pair of plate-shaped electrodes that are arranged to cover the surface of the metal strip and form a part of the wall of the electrolytic treatment tank, and a metal strip. An electrode support member that is attached to the pedestal so as to be freely displaceable in a direction perpendicular to the surface and supports the electrodes, an electrode displacement device that displaces the electrode support members, and a part of the tank wall of the electrolytic treatment tank. An apparatus for electrolytic treatment of metal strips, comprising: a flexible plate for forming metal strips; and a seal holding device that constantly presses a sealing member against an end of a tank wall of an electrolytic treatment tank or an end of the electrode support member. .