JPH08246189A - Support roll device for stripping in electroplating - Google Patents

Abstract

(57) [Summary] [Purpose] To stabilize strip passing in the electroplating tank and improve the uniformity of the amount of plating. [Structure] The support roll for plate passing installed in the plating tank has a structure in which a permanent magnet is arranged inside a rubber lining provided on the peripheral surface of the roll body. This roll is rotatably attached to the plating tank by a fluid pressure cylinder, and the amount of reduction of the roll with respect to the plate passing path can be adjusted. Further, means for removing the magnetic foreign matter attached to the support roll is provided integrally with the roll. [Effect] The attraction force of the permanent magnets becomes the driving force for the supporting rolls, and the rotation failure of the supporting rolls can be prevented without driving, so that bending and vibration of the strip can be prevented. Since the magnetic foreign matter on the roll surface can be removed, the plating surface of the strip is not damaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous electroplating apparatus for continuously electroplating the surface of a magnetic metal strip such as a steel plate, etc., in which the accuracy of the amount of plating applied in the plate width direction is improved, The present invention relates to a plate-passing support roll device installed in a plating tank to prevent contact between the electrode and the electrode.

[0002]

2. Description of the Related Art FIG. 5 is a schematic view showing a part of a continuous electroplating apparatus, in which 1 is a strip, 2 is an energizing roll, 3 is an electrode, 4 is a sink roll, and 5 is a plating tank. In order to perform uniform and accurate electroplating on a metal strip with this continuous electroplating apparatus, the distance between the electrode 3 and the strip 1 is kept constant, and the strip 1 travels between the electrodes 3 without vibrating. Is needed. Therefore, conventionally, as a method for improving the bending and vibration of the strip 1 traveling in the plating tank 5, a means for installing a roll pair such as a drawing roll 6 or a support roll 7 in the plating tank 5 is widely used. .

As another improvement method, a magnetic device is incorporated in a masking device for preventing overcoating of both ends (see Japanese Patent Laid-Open No. 59-113198), between electrodes or inside electrodes. A method of burying a magnetic pole pair (see Japanese Patent Application Laid-Open No. 1-127695), a combination of an electromagnetic pad and a range finder (see Japanese Patent Application Laid-Open No. 3-36292), and the like have been proposed, but these have complicated equipment. However, there is a drawback that the cost becomes high.

[0004]

When the support roll 7 is installed in the electroplating tank 5, the frictional resistance between the support roll 7 and the strip 1 is lowered by the plating solution, so that the support roll is rotated. Defects are likely to occur. In the case of a normal non-driven roll, the roll hardly rotates and both edges of the strip cut the roll surface, rendering it unusable in a very short time. Further, when the squeeze roll method is used to increase the frictional resistance between the roll and the strip, the increase in the rotational resistance of the roll due to the pressing force between the rolls becomes a problem, and it is impossible to completely solve the rotation failure. Can not. On the other hand, if these rolls are driven, the rotation failure can be solved, but in this case the equipment becomes complicated and the cost is high, and depending on the installation site, it is difficult to drive and the installation space is difficult. It is difficult to make it.

Incidentally, Japanese Utility Model Publication No. 2-81704 discloses that
As a threading roll used in a thin plate production line, a roll in which a magnet is embedded under a rubber lining formed on the circumferential surface of a roll body has been proposed, but this device has a smooth surface condition due to wear of the rubber lining. The purpose is to obtain sufficient frictional force between the rubber lining and the strip to prevent the strip from slipping even when It is different from the support roll.

The present invention has been made to solve the above-mentioned problems in the conventional method of installing a supporting roll in an electroplating tank to prevent the strip from bending and vibrating to stabilize the strip running in the plating tank. With this, it is possible to prevent rotation failure with relatively few additional elements without complicating the equipment such as roll driving or squeezing rolls, and moreover, support for plate passing that enables electroplating with excellent surface quality. It is intended to provide a roll device.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a attracting action by a permanent magnet is applied to a plate-passing support roll installed in a plating tank for supporting a strip that continuously travels in the electroplating tank. At the very least, the frictional force with the strip can be increased to prevent roll rotation failure, and the fluid pressure cylinder can be used to open the roll and adjust the roll reduction amount to the strip. The permanent magnet is arranged inside the rubber lining on the peripheral surface of the roll body, and both shaft ends of the permanent magnet are attached to the support arm pivotally attached to the plating tank. A supporting roll device for plate passing in electroplating, wherein the supporting arm is rotatably provided horizontally, and the supporting arm is rotatably held by a fluid pressure cylinder. Further, in order to prevent the deterioration of the plating surface quality due to the magnetic foreign matter adhered to the plate-passing support roll, the present invention provides a roll cleaning spray, a foreign matter scraping plate, or pores communicating with the hollow part of the roll body. It is characterized in that it is provided with a foreign matter removing means such as a method which is provided on the peripheral surface of the roll and sucks and removes the magnetic foreign matter adhering to the roll with a suction pipe connected to the hollow portion.

[0008]

In the plate-passing support roll of the present invention, the permanent magnet disposed under the rubber lining provided on the peripheral surface of the roll body generates an attractive force between the strip and the strip in contact with the roll. The resulting frictional force serves as a driving force for the plate-passing support roll, prevents the support roll from rotating poorly, stabilizes the strip-passing, and performs uniform and accurate electroplating on the strip.

As the material of the body of the support roll for the threading plate,
Steel may be used, but in order to prevent leakage and dispersion of magnetism and to reduce the moment of inertia of the roll, it is desirable to use non-magnetic and lightweight material such as aluminum.

The arrangement of the permanent magnets is not particularly limited, and for example, ring-shaped permanent magnets are arranged at intervals in the body length direction, or plate-shaped permanent magnets are arranged in the circumferential length and the body length direction. You can In that case, the permanent magnet does not necessarily have to be arranged over the entire length of the roll cylinder, and is appropriately set according to the width of the strip and the thickness of the rubber lining on the upper part of the permanent magnet. The thickness of the rubber lining above the permanent magnet is determined in consideration of the effect and durability of the permanent magnet. However, since there is no risk of damage to the strip edge with respect to the part inside the minimum width of the running strip, the lining thickness of the part is 5 mm or less, preferably about 1 to 3 mm. Further, with respect to the outer side portion, it is desirable that the lining thickness is 3 mm or more, preferably 5 mm or more in consideration of durability. It should be noted that no permanent magnet may be arranged in this portion.

Further, the plate-passing support roll is rotatably supported by a support arm pivotally attached to the plating tank, and the support arm is rotatably held by a fluid pressure cylinder. This is to open the support roll when magnetic foreign matters adhere to the strip support roll and adversely affect the strip surface quality, and to adjust the amount of reduction of the support roll with respect to the strip passing path. The roll reduction amount is not particularly limited, but is usually about 0 to 5 mm.

Further, the cleaning spray for removing foreign matters adhering to the plate-passing support roll is to spray a plating solution or a dilute sulfuric acid solution on the roll surface to dissolve and remove the foreign substances. Since it is attached to the support arm, it can be used both when the roll is under pressure and when it is open. The foreign matter scraping plate is a method of removing foreign matter on the roll surface by sliding it on the surface of the threading support roll, and therefore a material that does not damage the surface of the threading support roll, such as polyethylene, MC nylon, Teflon or the like is used. Since the foreign matter scraping plate is also attached to the support arm of the plate-passing support roll like the cleaning spray, it can be used both when the roll is pressed and when it is opened. Further, since the foreign matter removing means by the suction method is a method of taking out the magnetic foreign matter adhered to the roll surface to the outside through the inside of the roll, the magnetic foreign matter adhered to the roll surface is prevented from being mixed in the plating bath and the strip surface Not only the quality can be ensured, but also the plating solution can be kept clean.

[0013]

【Example】

Example 1 FIG. 1 exemplifies the structure of a plate-passing support roll according to the present invention. (A) is an example in which permanent magnets are uniformly arranged over the entire roll cylinder length, and (B) is the center of the roll cylinder length. Example in which the thickness of the rubber lining is reduced to enhance the magnetic force, (C) is an example in which a permanent magnet is arranged only in the central portion of the roll cylinder length, and (D) is a pore for removing foreign matter through the entire roll cylinder length. Examples of drilling are shown respectively. FIG. 2 is a side view showing an example of a plate passing support roll device according to the present invention, in which 8 is a plate passing support roll, 9 is a permanent magnet, 10 is a rubber lining layer, and 1
1 is a hole, 12 is a support arm, 13 is a bearing, 14 is a fluid pressure cylinder, 15 is a positioning stopper, 16 is a cleaning spray, 17 is a pivot, and 18 is a suction pipe.

The threading support roll according to the present invention has, for example, a rubber lining 10 on the outer periphery of a hollow roll body integrally provided with a roll barrel 8-2 on the outer periphery of a roll shaft 8-1.
And a ring-shaped permanent magnet 9 is arranged under the rubber lining. Figure 1 (A)
Among the rolls (D) to (D), the plate-passing support roll shown in (A) has a ring-shaped permanent magnet 9 on the outer periphery of the roll body 8-2.
Is a roll arranged over the entire cylinder length and has a uniform lining thickness over the entire length of the roll cylinder. (B) is a roll in which the thickness of the rubber lining layer in the central portion of the roll body is reduced by using a thick ring-shaped permanent magnet 9 arranged in the central portion of the roll body length. The magnetic force of one part is stronger than the other. (C) is a roll in which a thick ring-shaped permanent magnet 9 is arranged only in the central portion of the roll cylinder length to reduce the thickness of the rubber lining layer in the central portion of the roll cylinder length. It is valid. (D) is a roll having a hole 11 penetrating through the rubber lining layer 10 and the roll body 8-2 and communicating with the inside of the roll, and the suction pipe 1 is provided at one end of the roll.
8 is connected, and the magnetic foreign matter adhering to the roll surface is made into a micropore 1.
1 has a structure that can be taken out through the hollow portion 8-3.

In the plate passing support roll device shown in FIG. 2, the support arm 12 has its upper end portion rotatably attached to the upper portion of the plating tank 5 by a pivot 17, and has its lower end portion supported by the plate passing member. A shaft stopper of the roll 8 is rotatably supported by a bearing 13, one end of which is rotatably pivotally attached to the upper portion of the plating tank 5 and is held by a fluid pressure cylinder 14, and a positioning stopper attached to the upper portion of the plating tank 5. It is positioned at a predetermined position at 15. Since the position of the support arm 12 can be set by the fluid pressure cylinder 14, the positioning stopper 15 is not always necessary, but when used together with the fluid pressure cylinder 14, the positioning of the plate passing support roll is performed. Can be performed more reliably and stably.

The cleaning spray 16 is a support roll 8 for sheet passing.
Is attached to the support arm 12 on the back side of the roll toward the surface of the roll, and is connected to a cleaning liquid supply pipe (not shown) such as a plating liquid or a dilute sulfuric acid liquid. Further, instead of the cleaning spray, a scraping plate (not shown) can be similarly attached to the support arm 12.

The plate passing support roll device of the present invention is usually installed at the inlet side of a vertical electroplating tank. This is because it is necessary to remove the plating solution on the strip on the outlet side of the plating tank, and the drive type squeezing roll 6 is installed.

When the strip passing support roll device shown in FIG. 2 is installed on the inlet side of the vertical electroplating tank, the strip 1 in contact with the strip passing support roll 8 has a rubber lining layer 10 on the peripheral surface of the roll body. By being attracted by the ring-shaped permanent magnet 9 embedded in the roller, the frictional force with the roll increases, and the frictional force serves as the driving force for the support roll to prevent the rotation failure of the support roll.

Further, magnetic foreign matter adheres to the support roll 8,
If there is a possibility that the quality of the plating surface will be adversely affected, the support roll 8 is opened by the fluid pressure cylinder 14, or the plating solution or dilute sulfuric acid is sprayed on the roll surface by the cleaning spray 16 for cleaning. Alternatively, FIG.
When the support roll shown in (D) is used, the suction pipe 1
At 8, the magnetic foreign matter on the roll surface is removed by suction. In that case, it is also possible to use together with the cleaning spray 16 or a scraping plate.

Embodiment 2 FIG. 3 illustrates the effect of improving the strip shape between the electrodes when the above-described plate-passing support roll device of the present invention is applied to an actual machine. (A) uses a normal support roll. FIG. 3B is a cross-sectional plan view in the case where the device of the present invention is applied. That is, when a normal supporting roll is used, the rotation failure of the roll causes the edge portion of the strip 1 passing between the electrodes 3 to be curved, which makes the strip running unstable and causes this curvature. The surface of the support roll 7 is cut at the edge portion and becomes unusable in an extremely short time. However, according to the support roll device of the present invention, by preventing the rotation failure of the support roll 8,
The strip 1 passes between the electrodes 3 in a straight state at both the central portion and the edge portion, the support roll 8 is not damaged by the strip edge, the passing plate is stable, and the distance between the strip 1 and the electrode 3 is stable. Is held constant.

Further, FIG. 4 also illustrates the effect of improving the uniformity of the amount of plating adhered when the sheet passing support roll device of the present invention is applied to an actual machine. (A) shows an ordinary support roll. Cases (conventional) and (B) show cases where the device of the present invention is applied. That is, when a normal supporting roll is used, the edge portion of the strip 1 passing between the electrodes 3 is curved, and the passing plate becomes unstable, so that the plating adhesion amount becomes uneven in the strip width direction. In contrast,
When the device of the present invention is applied, the strip 1 is passed through between the electrodes 3 in a straight state in both the central portion and the edge portion, so that the distance between the strip 1 and the electrode 3 is kept constant, so that a uniform distance is obtained. Plating coverage can be obtained. Furthermore, by using the device of the present invention, the distance between electrodes can be reduced to 5
In addition to shortening by about mm, the plating power can be reduced by about 5%.

[0022]

As described above, according to the apparatus of the present invention, it is possible to prevent the rotation failure of the supporting roll by a relatively simple means without complicating the equipment, and therefore the equipment cost is low and the economy is low. Not only is it effective, but the uniformity of the amount of plating adhered is improved by the effect of improving the strip shape and the effect of stabilizing the threaded plate, and magnetic foreign matter on the roll surface can be easily removed as necessary. It has an excellent effect that electroplating with excellent surface quality becomes possible.

[Brief description of drawings]

FIG. 1 is a view exemplifying a structure of a plate passing support roll according to the present invention, in which (A) is a partially longitudinal side view showing a support roll in which permanent magnets are uniformly arranged over the entire roll cylinder length;
(B) is a partially longitudinal side view showing a supporting roll in which the rubber lining thickness in the central portion of the roll cylinder length is reduced to enhance the magnetic force.
(C) is a partially longitudinal side view showing a supporting roll in which a permanent magnet is arranged only in the central portion of the roll cylinder length, and (D) shows a supporting roll having pores for suctioning and removing foreign matter over the entire roll cylinder length. It is a partial longitudinal side view shown.

FIG. 2 is a side view showing an example of a plate passing support roll device according to the present invention.

FIG. 3 illustrates the effect of improving the strip shape between electrodes when the plate-passing support roll device of the present invention is applied to an actual machine. FIG. 3A shows a case where a normal support roll is used (conventional). FIG. 3B is a cross-sectional plan view when the device of the present invention is applied.

FIG. 4 is a view exemplifying an effect of improving the uniformity of the amount of plating adhered when the sheet passing support roll device of the present invention is applied to an actual machine. FIG. ) And (B) show the cases where the device of the present invention is applied.

FIG. 5 is a schematic view showing a part of a continuous electroplating apparatus to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 strip 2 energizing roll 3 electrode 4 sink roll 5 plating tank 6 drawing roll 7, 8 support roll for plate passing 8-1 roll shaft 8-2 roll body 8-3 hollow part 9 permanent magnet 10 rubber lining layer 11 pores 12 Support Arm 13 Bearing 14 Fluid Pressure Cylinder 15 Positioning Stopper 16 Cleaning Spray 17 Axis 18 Suction Pipe

Claims (3)

[Claims] 1. A support roll for plate passing, which is installed in a plating tank to support a strip that continuously travels in the electroplating tank, the inside of a rubber lining provided on a peripheral surface of a body. A permanent magnet is disposed on the shaft, and both ends of the shaft are rotatably provided horizontally on a support arm pivotally mounted on the plating tank, and the support arm is rotatably held by a fluid pressure cylinder. A supporting roll device for plate passing in electroplating, which is characterized in that 2. The electroplating according to claim 1, wherein a roll cleaning spray for removing magnetic foreign matters adhering to the plate passing support roll or a foreign matter scraping plate is attached to the support arm. Support roll device for threading. 3. The plate-passing support roll has a hollow roll body portion, and pores communicating with the hollow portion are bored in the peripheral surface of the roll. The roll is supported by a suction pipe connected to the hollow portion. 2. A plate-passing support roll apparatus for electroplating according to claim 1, further comprising: a foreign matter removing unit of a type that sucks and removes the magnetic foreign matter attached to the sheet.