JPH10330975A - Method for degreasing metallic foil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flame-degreasing method for preventing the metallic foil such as aluminum foil from being creased. SOLUTION: Metallic foil 2 is wound on a water-cooled rolls 1 (1A and 1B) and traveled, and the oil depositing on the traveling foil is vaporized and burned by line burners 4 to degrease the foil. In this case, guide rolls 3 are provided close to the upstream side of the water-cooled rolls, hydrostatic pressure pads 5 are furnished between the guide rolls and water-cooled rolls over the full width of the foil, the foil is firmly held to the water-cooled rolls by hydrostatic pressure due to the gas injected from the pads, and grease is removed by the line burners.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degreasing method suitable for metal foils, especially aluminum foils.

[0002]

2. Description of the Related Art Conventionally, for example, in order to perform an annealing treatment on a metal foil such as an aluminum foil, it is necessary to remove rolling oil attached to the surface of the metal foil. There are various methods for removing the same. In recent years, the present application discloses a degreasing method in which the oil adhering to the surface of the metal foil is vaporized and burned by a line burner in the water-cooled roll while running while winding the metal foil around a water-cooled roll. It has been proposed by a person (Japanese Patent Laid-Open No. 6-165973).

[0003]

However, when the metal foil was degreased by the above method, it was found that wrinkles often occurred in the width direction of the metal foil. As a result of various studies by the present inventors on the cause, when rolling unevenness (partially stretched portion) occurs during rolling of the metal foil, this portion does not sufficiently adhere to the cooling roll, that is, this portion is It has been found that as a result, the temperature of this portion becomes higher than the temperature of other portions during flame degreasing by the line burner, and the stretched portion is further stretched to cause wrinkles. It is not surprising that mechanical tension is applied to the metal foil to bring the metal foil into close contact with the cooling roll. However, since the metal foil itself is thin, it may be broken. Therefore, an object of the present invention is to provide a method for degreasing a metal foil that solves the above-mentioned problem by providing simple means.

[0004]

According to the present invention, in order to achieve the above object, the metal foil is wound around a water-cooled roll, and the oil adhered to the surface of the metal foil is vaporized and burned by a line burner in the water-cooled roll. In the method for degreasing a metal foil, a guide roll is provided at least in proximity to the upstream side of the water-cooling roll, and a static pressure pad is provided between the guide roll and the water-cooling roll over the entire length of the metal foil in the width direction. The metal foil is brought into close contact with a water-cooled roll by static pressure based on gas ejected from a pressure pad and degreased by the line burner.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, 1A, 1B
Is a water-cooled roll having a known structure such that a metal foil, for example, an aluminum foil 2 from an unwinder (not shown) is wound via a guide roll 3 and wound up by a winder (not shown). Has become. And the water-cooled roll 1A,
1B, a well-known premix line burner 4 is provided.
The combustion frame is provided with the water-cooled rolls 1A,
The aluminum foil 2 wound and cooled around 1B is brought into uniform contact in the width direction to perform degreasing by vaporization and combustion removal. The type of the line burner 4 is not particularly limited.
It is preferable to use a premix type having a uniform combustion flame and good combustion controllability and an air-fuel ratio of 0.95 to 1.05.

The guide roll 3 and the water-cooled roll 1
A, between both water-cooled rolls 1A and 1B or water-cooled roll 1B
Static pressure pad (pressure pad) between guide roll 3
5 (5a, 5b) is installed. This static pressure pad 5 is a well-known one, and as shown in FIG.
The slits 7 are provided over the entire width of the aluminum foil 2 so as to discharge gas inward in the longitudinal direction of the surface. ) Can be adjusted by a control valve provided in a duct (not shown).

[0007] With the above configuration, for example, the aluminum foil 2 from the unwinder is provided with a guide roll 3, a water-cooled roll 1A,
It is wound on a winder via 1B. The aluminum foil 2 wound around the water-cooled rolls 1A, 1B is a line burner 4
Contact with combustion flames from That is, the oil layer attached to the surface of the aluminum foil 2 is instantaneously heated and vaporized and evaporated. In addition, part of the fuel is burned, and the unburned vaporized vapor is blown off by the high-speed flame to maintain high heat transfer.

In this case, the aluminum foil 2 is brought into close contact with the water-cooled rolls 1A, 1B at a predetermined static pressure based on the gas ejected from the above-mentioned static pressure pads 5a, 5b. Water-cooled roll 1 even if
A, 1B, the aluminum foil 2 is uniformly cooled over the entire surface, and the stretched portion does not increase and does not wrinkle. In addition, since the static pressure pads 5a and 5b are installed near the water-cooled rolls 1A and 1B, a sufficient tension can be applied to the aluminum foil 2 with a small static pressure, and the aluminum foil 2 is not damaged.

In the above description, two water-cooled rolls 1 are provided. However, one water-cooled roll 1 may be provided.
It is sufficient that at least one of them is installed on the upstream side of the water cooling roll 1. Further, the metal foil 2 is not limited to the aluminum foil, but may be a copper foil or the like.

[0010]

As is apparent from the above description, the present invention relates to a metal foil in which the oil adhered to the surface of the metal foil is vaporized and burned by a line burner in the water-cooled roll while the metal foil is wound around a water-cooled roll. In the degreasing method, a guide roll is provided at least in proximity to the upstream side of the water-cooling roll, and a static pressure pad is provided between the guide roll and the water-cooling roll over the entire length in the width direction of the metal foil. The metal foil is brought into close contact with the water-cooled roll by the static pressure based on the gas ejected from the water, and is degreased by the line burner. Therefore, even if a stretched portion occurs in the metal foil during rolling, this portion is also sufficiently cooled and does not partially overheat, that is, to prevent the stretched portion from becoming larger and becoming wrinkled. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a method for degreasing a metal foil according to the present invention.

FIG. 2 is a cross-sectional view of the static pressure pad of FIG.

[Explanation of symbols]

1A, 1B: water-cooled roll, 2: metal foil, 3: guide roll, 4: line burner, 5 (5a, 5b): static pressure pad.

Claims (1)

[Claims] 1. A method for degreasing a metal foil in which a metal foil is vaporized and burned by a line burner in a water-cooling roll portion while running while winding the metal foil around a water-cooling roll, wherein at least the moving metal of the water-cooling roll While providing a guide roll close to the upstream side of the strip,
A static pressure pad is provided between the guide roll and the water-cooled roll over the entire length of the metal foil in the width direction, and the metal foil is brought into close contact with the water-cooled roll by static pressure based on gas ejected from the static pressure pad, and the line burner is used. A method for degreasing a metal foil, comprising degreasing.