JP2003193282A - Electrodeposition drum for producing metallic foil and method of producing metallic foil using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrodeposition drum by which metallic foil free from edge builds can be produced, and also, metallic foil of a plurality of strips can be produced, and to provide a method or producing metallic foil using the same. <P>SOLUTION: In the electrodeposition drum 1-1 for producing metallic foil, metal is precipitated over the surface by electrolysis, and is thereafter peeled to produce foil. Two or more insulating materials 6 with a width of ≤2 mm are buried so as to be surrounded at positions far from insulating materials 7 at the edge parts. In the method, two edge foil, and electrolytic metal foil of one strip or the plurality of strips are obtained. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrodeposition drum for producing a metal foil by an electrolytic method and a method for producing a metal foil using the same, and in particular, a metal foil without edge build can be produced, and The present invention relates to an electrodeposition drum capable of producing a plurality of strips without cutting the metal foil, and a method for producing a metal foil using the drum.

[0002]

2. Description of the Related Art Electrolytic metal foils are formed by electrolytically plating the drum surface using an electrodeposition drum made of a material with poor plating adhesion such as stainless steel, chrome-plated steel or titanium. It is manufactured by continuously peeling off the plating layer.

FIG. 1A is a schematic view for explaining the principle of the electrolytic deposition method, FIG. 1B is a partial sectional view of an electrodeposition drum, and FIG. 1C is a schematic end sectional view of an electrolytic metal foil. is there.

The electrolytic metal foil 4 (hereinafter, simply referred to as "metal foil") causes an electrolytic solution 3 and an electric current to flow between a rotating electrodeposition drum 1 and a fixed anode 2 to form a layer on the surface of the electrodeposition drum. It is manufactured by depositing metal and continuously peeling and recovering it.

Both ends of the drum 1 are covered with an end insulating material 7 as shown in FIG. 1 (b). Therefore, in the metal foil 4 deposited on the surface of the electrodeposition drum, concentration of electrolytic current occurs at the boundary portion 7-1 between the surface of the electrodeposition drum and the insulating material, and as shown in FIG. -1 increases the thickness. This phenomenon is called "edge build", and when the foil with the edge build is wound up, the winding shape becomes a drum shape, and a crack may occur from the end of the foil.

To prevent the occurrence of this edge build,
Make the width of the anode narrower than the width of the electrolysis section of the electrodeposition drum,
There is a method of providing a shielding plate between the anode and the cathode at both ends of the electrolysis section. However, even if these measures are taken, it is difficult to completely prevent the edge build, and mechanical cutting is performed by a slitter or the like before winding.

In terms of manufacturing metal foil, a wide electrodeposition drum (for example, one having a length of more than 1 m) is used in order to improve production efficiency. However, the handling surface when using metal foil is narrow (for example, from several mm to 500 mm).
Things are preferred. For this purpose, it is necessary to cut the produced wide metal foil with a slitter or the like in another line. However, when cut mechanically, the cut portion of the metal foil may be deformed (burrs, burrs, ear extensions, etc.), which becomes more remarkable as the thickness of the metal foil becomes thinner.

As a method of solving this, a plurality of pulleys are provided above the electrodeposition drum, and an insulating belt (belt) is hung between the electrodeposition drum and the respective pulleys to form a metal foil. A method of manufacturing a metal foil and an apparatus thereof (see Japanese Patent Laid-Open No. 53-146230, which prevents the occurrence of burrs and cracks at the edge portion and allows the width of the metal foil to be freely adjusted, have been proposed. There is. This is to obtain a metal foil having the same width as the conductive portion by depositing a metal foil on the conductive portion by alternately providing the conductive portion and the insulating portion in the width (axis) direction of the surface of the electrodeposition drum. is there.

[0009]

In the method using the insulating belt, it is possible to prevent the occurrence of cracks from burrs at the edge portion when the metal foil is peeled and recovered, but it is possible to prevent the occurrence of edge build. Can not. For this reason, when the metal foil is wound into a coil, it may be broken like a drum. In order to prevent this, it is necessary to mechanically cut (slit) the edge portion of the metal foil immediately after peeling it from the electrodeposition drum.

An object of the present invention is to provide an electrodeposition drum capable of producing a metal foil having no edge build and capable of producing a plurality of strips of metal foil, and a method for producing a metal foil using the same. To do.

[0011]

In order to investigate the cause of the edge build-up of metal foil and the breakage from the end, the inventors of the present invention wound an electrodeposition drum with an insulating tape or the like to separate the insulating part from the conductive part. The cross section of the metal foil formed at the boundary (see reference numeral 7-1 in FIG. 1 (b)) was investigated. As a result, the following findings were obtained.

(1) When it is used for a long period of time, the adhesive strength of the insulating material decreases, and electrolysis occurs due to the penetration of the plating solution. As shown in FIG. 1 (c), the end insulating material 7 and the surface of the electrodeposition drum 1 are When the electrolytic solution enters between and, the metal is also plated on this part, so
A gap plating portion 4-2 may occur at the edge of the foil. When such a metal foil is peeled off from the electrodeposition drum, the gap plated portion 4-2 is pressed by the end insulating material, so that a crack is generated at the end of the metal foil.

(2) When an insulating tape is provided at the center of the electrolytic drum in order to obtain a plurality of strips of metal foil, the edge buildup of the metal foil can be reduced by reducing the width of the insulating tape.

(3) By embedding the insulating material in the electrodeposition drum and reducing its width, the occurrence of edge buildup of the metal foil can be further reduced.

(4) If an insulating material having a width of 2 mm or less is provided around the end insulating material 7, edge build-up does not occur in the metal foil formed at both ends of the insulating material.

From these findings, it was considered that the above phenomenon (1) could not be prevented, so in the present invention, this portion was removed as an edge foil. As a method of removing the insulating material, a circulating insulating material was embedded in the surface of the electrodeposition drum to reduce its width.

The gist of the present invention resides in the following electrodeposition drum shown in FIG. 2 and the method for producing a metal foil using the following electrodeposition drum.

An electrodeposition drum for producing a foil by depositing a metal on a surface by electrolysis and then peeling it off,
Electrodeposited drum 1-1 for metal foil production, in which two or more insulating materials 6 each having a width of 2 mm or less are embedded by being wound around at least two positions away from the insulating material 7.

A method for producing a foil by depositing a metal on the surface of an electrodeposition drum by electrolysis and then peeling it off, wherein the width is 2 mm at a position away from the insulating material 7 at the end as a cathode.
A method of obtaining two edge foils and one or a plurality of strips of electrolytic metal foil by using an electrodeposition drum 1-1 in which two or more insulating materials 6 are embedded by being wound around the following.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION In the electrodeposition drum of the present invention, the insulating material is provided at a position separated from the insulating material at both ends of the drum by at least 5 mm or more, and further provided at a position corresponding to the required width of the metal foil. .

FIG. 2 is a conceptual diagram showing the electrodeposition drum of the present invention and a process for manufacturing the same, and FIG. 2A is a diagram showing a state in which grooves for embedding an insulating material are formed on the drum surface, and FIG. ) Is a view showing a state where an insulating material is embedded in the groove, and (c) is a perspective view of FIG. (B).

The electrodeposition drum 1-1 is made of stainless steel, chrome-plated cast iron, chrome-plated steel, titanium, titanium-lined material, or the like.

The groove 5 for embedding the insulating material 6 is shown in FIG.
As shown in, the outer peripheral portion of the drum is circulated, and the cross section is U-shaped or V-shaped and is formed by lathe processing. Insulation 6
The (insulating resin) is embedded in the groove as shown in FIG. The surface of the insulating material 6 has the same level as the conductive part,
Or it is desirable to make a slight depression.

Insulating material 6 from insulating material 7 on both ends of the drum to A (5 mm
The reason for providing them at positions separated by (above) is to prevent edge build-up that occurs in the metal foil. FIG. 3 is a schematic diagram for explaining the relationship between the occurrence of edge build and the width of the insulating material, where (a) is the width of the insulating material is 2 mm, and (b) is the width of the insulating material is 3 mm. That is the case.

Insulating material 6 from end insulating material 7 at both ends of the drum to A
Edge foil 4-3 is generated in the A portion if provided at a position apart from each other. Edge build-up 4-1 occurs on the edge foil 4-3 as shown in FIGS. 3 (a) and 3 (b). However, if the insulating material 6 of 2 mm is provided at a position separated from the end insulating material 7 by A, as shown in FIG.
As shown in, no edge build occurs on the metal foil 4. In addition, no edge build is observed at the position where the edge foil 4-3 contacts the insulating material 6.

If the width of the insulating material 6 is 3 mm, as shown in FIG. 3 (b), the edge build 4-5 is located at the position where the metal foil 4-4 and the edge foil 4-6 are in contact with the insulating material 6-1. And 4-7 occur.

As described above, if the width of the insulating material 6 is 2 mm or less, the occurrence of edge build can be prevented. Therefore, as shown in FIG. If the insulating material 6-2 having a width of 2 mm or less is provided in the central portion, two metal foils without edge build can be obtained.

If the width of the insulating material 6 is 2 mm or less, the shape of the end face of the metal foil becomes better and the manufacturing yield of the metal foil becomes higher. However, it is desirable to set the lower limit to about 0.05 mm in order to process the groove and fill the insulating material.

As the insulating material 6, a material having a property not to be attacked by the electrolytic solution, for example, epoxy resin, silicon resin, polyethylene, rubber or the like can be used. Inorganic materials (for example, alumina, silica, etc.) if not attacked by the electrolyte
May be

The metal foil manufactured by using the electrodeposition drum of the present invention does not have edge build, so that it is not necessary to perform mechanical cutting. Further, since it can be wound up flat, it does not break from the end.

[0031]

EXAMPLE A metal foil manufacturing experiment was performed using an electrodeposition drum type metal foil manufacturing apparatus as shown in FIG.
A μm nickel foil was produced.

The electrodeposition drum has a diameter of 40 mm as shown in FIG.
It is a hollow roll made of pure titanium with a length of 0 mm and a length of 200 mm, the both ends of the drum are covered with an insulating material 7, and the electrolytic portion has a width of 160 mm and a length of 600 mm. An insulating material 6 was provided around the surface of the electrodeposition drum at the position shown in Table 1.

[0033]

[Table 1]

As the insulating material 6, an epoxy resin (two-component type: Neogose WP-NS manufactured by Shinto Paint Co., Ltd.) and a silicone resin (SH780 manufactured by Toray Dow Corning Silicone Co., Ltd.) were used.

The plating bath was prepared by mixing 250 g / L of nickel sulfate, 45 g / L of nickel chloride and 40 g / L of boric acid, and adjusting the pH.
The solution was 3.5.

The electrolysis conditions are a bath temperature of 50 ° C. and a current density of 20.
It was set to A / dm ² .

As is apparent from Table 1, the invention example No. 1
~ 8 metal foil, the width of the insulating material (reference numeral 6 in Figure 2)
Since the thickness was 2.0 mm or less, there was no difference between the thickness of the end portion and the thickness 100 mm away from the end, and no edge build occurred.

On the other hand, in the metal foils of Nos. 9 to 12 of the comparative example, since the insulating material was provided without a gap from the end insulating material, the thickness of the end portion was 100 mm apart. It became larger than the thickness, and the occurrence of edge build was observed. In the metal foils of Nos. 12 to 14 of the comparative example, the width of the insulating material was 3.0 mm, so the thickness of the end portion was larger than the thickness at the position 100 mm apart, and the occurrence of edge buildup was recognized. It was Number 15
Since no insulating material was provided for the metal foil of No. 3, the occurrence of edge build-up of 5 μm was observed.

[0039]

In the electrodeposition drum of the present invention, since the belt-shaped insulating material that circulates is embedded at a position away from the end insulating material, the edge formed at the end of the metal foil deposited on the conductive portion. You can eliminate the occurrence of build. Since the metal foil manufactured using this electrodeposition drum does not have a large thickness at the end, it is not necessary to cut the end. Also, the insulating material is
Since it can be provided at any position on the electrodeposition drum, it is possible to obtain a metal foil having an arbitrary width with a good end cross-sectional shape without mechanical slitting.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating the principle of an electrolytic deposition method.

FIG. 2 is a conceptual diagram showing an electrodeposition drum manufacturing process of the present invention, in which (a) shows a state in which a groove for embedding an insulating material is formed on the drum surface, and (b) shows an insulating material in the groove. The figure which shows the state which was embedded, (c) is a perspective view of figure (b).

FIG. 3 is a schematic diagram for explaining the relationship between the occurrence of edge build and the width of the insulating material, where (a) is the width of the insulating material is 2 mm, and (b) is the width of the insulating material is 3 mm. That is the case.

[Explanation of symbols]

1. Electroplated drum 2. Anode 3. Electrolyte 4. Metal foil 5. Groove 6,7. Insulating material

Continued front page    (72) Inventor Hirohisa Seto             Sumitomo Metal Building Materials 1-21 Fuso-cho Amagasaki City Hyogo Prefecture             Within the corporation (72) Inventor Kunihiro Fukui             4-533 Kitahama, Chuo-ku, Osaka-shi, Osaka Prefecture             Tomo Metal Industry Co., Ltd. (72) Inventor Masaya Kimoto             4-533 Kitahama, Chuo-ku, Osaka-shi, Osaka Prefecture             Tomo Metal Industry Co., Ltd.

Claims (2)

[Claims] 1. After depositing a metal on a surface by electrolysis,
An electrodeposition drum for peeling it off to produce a foil, characterized in that two or more insulating materials each having a width of 2 mm or less are embedded at a position apart from the insulating material at the end. Electrodeposited drum for metal foil production. 2. A method for producing a foil by depositing a metal on the surface of an electrodeposition drum by electrolysis and then peeling it off to form a foil having a width of 2 mm at a position away from an insulating material at an end.
A method for producing a metal foil, characterized in that two edge foils and one or a plurality of strips of electrolytic metal foil are obtained by using an electrodeposition drum in which two or more of the following insulating materials are embedded in a circle.