JPH072245B2 - Draining roll device and draining method for metal foil strip - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for draining a continuously running metal foil strip and an effective continuous draining method using the device.

(Prior Art) Metal foil strips are generally manufactured by rolling, but final products, including those manufactured by other manufacturing methods, are subjected to surface cleaning treatment to obtain products.

That is, when a metal foil strip is conventionally manufactured, after cold rolling a metal plate such as a steel plate into a foil, rolling oil or metal powder adhered to the surface of the foil strip or a metal soap material that is a reaction product of these. Perform alkaline cleaning to remove impurities such as. Following this, for example, brush cleaning and warm water cleaning (washing with hot water) are performed. When washing with hot water, hot air drying is performed to quickly dry the surface of the foil strip. However, in order to carry out this hot-air drying easily and quickly, it is usually necessary to sufficiently drain the water with a roll before hot-air drying.

By the way, a conventional drainer for a metal foil strip has a pair of upper and lower rolls 10, as shown in a schematic sectional view of FIG.
10 are arranged so that their central axes are in the same vertical plane, and are arranged in contact with the upper and lower surfaces of the metal foil strip 12, which is the same as that used for ordinary metal strip materials. It had a structure of. The material used for these rolls is chloroprene rubber, etc., and the metal foil strips are fed between the pair of rolls that are placed in contact with each other, so that the metal foil strips are strongly pressure-bonded to the surface, This is a method of pushing out the attached water.

(Problems to be Solved by the Invention) However, in such a conventional draining method, since the contact area between the roll and the metal foil strip is small, slippage easily occurs between the metal foil strip and the roll, and Rolls are easily scratched on the surface. Therefore, in order to prevent this slip, measures are taken such that the rotational peripheral speed of the roll and the moving speed of the metal foil strip are equalized, or the pressing force of the roll against the metal foil strip is increased. However, it is actually difficult to synchronize the rotational peripheral speed of the roll and the moving speed of the metal foil strip to be completely equal. Further, if the pressing force of the roll is increased, slipping of the metal foil strip can be prevented, but conversely, indentation is likely to occur on the surface of the metal foil strip.

Furthermore, since it is extremely difficult to uniformly contact the upper roll and the lower roll with the foil strip, the tension applied to the metal foil strip becomes uneven, and there is a problem that wrinkles easily occur on the surface of the continuously running metal foil strip. .

Under such circumstances, the conventional measures are to reduce the traveling speed to perform careful work, or to blow hot air without sufficient draining to dry it for a long time. However, despite such measures, a decrease in yield is inevitable.

(Means for Solving the Problem) As a result of studying various methods for solving the above problems, the present inventors focused on the arrangement of rolls, that is, the positional relationship between the upper roll and the lower roll, and By offsetting the arrangement position and by arranging the upper and lower rolls without contacting each other, it is possible to prevent the generation of indentations while ensuring the drainage property of the metal foil strip, and to find that wrinkles can be eliminated. completed.

That is, the gist of the present invention is a draining device composed of a pair of upper and lower rolls in contact with the upper and lower surfaces of a continuously running metal foil strip, and
When the center axes of the lower rolls are arranged at intervals in the running direction of the metal foil strip, and further roll diameter D, lap amount L, and offset amount S are set, L / D = 0.1 to 0.5, S / D = 0 .
A draining device for a metal foil strip, characterized in that, in order to satisfy 4 to 0.9, these upper and lower rolls are arranged so as to be wrapped and spaced apart in the direction perpendicular to the surface of the metal foil strip.

From another aspect, the present invention is characterized in that, when washing a continuously running metal foil strip with water, draining is performed using the above-mentioned draining device installed in a plurality of stages, a continuous draining method for a metal foil strip. Is.

Here, in the present invention, the “metal foil strip” is a metal foil that is wound into a coil and then rewound, and is subjected to surface cleaning treatment, hot water washing, draining, and drying treatment during continuous running. To be seen. The term "foil" generally means a foil having a thickness of about 0.1 to 0.005 mm, but in the present invention, when the drainer roll is brought into contact with the foil, the foil is bent along its circumferential surface. What is called a thin plate is included in the range as long as it exhibits flexibility.

(Operation) Next, a method for draining a metal foil strip using a roll and an apparatus therefor according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic explanatory view of a drainer according to the present invention, which is composed of a pair of upper and lower rolls 2 and 3 contacting the upper and lower surfaces of a metal foil strip 1 and having the same diameter (D) in the illustrated example. The draining device is arranged such that the central axes of the upper and lower rolls 2 and 3 are spaced from each other in the traveling direction on the left-hand side of the metal foil strip 1 in the drawing. That is, the distance S between the central axes, that is, the offset amount is set to be equal to or less than the roll diameter. Further, the distance between the upper and lower rolls in the vertical direction, that is, the overlapping amount (L) of the two rolls in the direction perpendicular to the plane of the metal foil is set to zero or more, and the two rolls are arranged so as to be wrapped. Of course, both rolls are always spaced apart by a distance (G).

The material of such a draining roll is not particularly limited, and may be rubber-like as in the conventional case.

The draining device according to the present invention having such a configuration is arranged, for example, on the downstream side of the hot water washing process, and the metal foil strip 1 containing water on the surface after washing with hot water is the draining roll 2 according to the present invention. First of all, the lower roll 2 is contacted. Since the area of the contact portion A with the lower roll 2 is sufficiently larger than the area of the contact portion C of the conventional type draining roll (see FIG. 2), it is possible to completely drain the upper surface of the metal foil strip. .. Next, the metal foil strip 1 comes into contact with the upper roll 3, but the draining of the lower surface of the metal foil strip is performed completely in exactly the same way as with the lower roll 2. Further, the pressing force generated on the metal foil strip at this time is extremely small as compared with the conventional system because it is a system in which only one surface of the metal foil strip is in contact with itself. Therefore, the tension applied to the metal foil strip becomes small, and the generation of wrinkles on the surface of the metal foil strip can be suppressed.

The order of contact with the upper and lower rolls is not performed as described above, and the effect is the same even from the upper roll. Further, it is of course possible to use not only the draining device of the present invention but also a plurality of stages continuously installed.

Here, the positional relationship between the upper and lower rolls according to the present invention will be described in more detail.

First, the feature of the present invention is that the upper and lower rolls are arranged in an offset manner in the winding direction of the metal foil strip and the direction perpendicular to the surface of the foil strip, and the offset amount requires a clear range. Not meant to be. That is, it is only necessary to appropriately combine the offset amounts in the two directions to obtain a roll arrangement capable of ensuring the optimum drainage property, and it is possible for those skilled in the art to appropriately set the roll arrangement.

However, according to the knowledge of the present inventors, the lap amount (L) / roll diameter (D), the offset amount (S) / roll diameter (D), and the roll gap (G) in FIG. There is a suitable amount because it is related to the generation of wrinkles on the surface, and these points will be described below.

Lapping amount (L) / roll diameter (D): It is the ratio of the overlap margin of the upper and lower rolls in the direction perpendicular to the surface of the metal foil strip with respect to the roll diameter. If this value is large, the contact area between the metal foil strip and the roll increases, so draining is performed. The property is good, but the tension generated in the metal foil strip is large and wrinkles are likely to occur. When this value is small, the contact area is small and wrinkles are less likely to occur, but the drainability is deteriorated. Therefore, the lap amount (L) / roll diameter (D) is in the range of 0.1 or more and 0.5 or less.

Offset amount (S) / roll diameter (D): A ratio of the offset amount of the upper and lower rolls in the metal foil strip winding direction to the roll diameter. That is, when this value is large, the metal foil strips existing between the rolls are bent, and the contact area between the metal foil strips and the roll is large, so that the drainage property is good, but wrinkles are likely to occur on the surface of the metal foil strips. Further, when this value is small, the contact area is small and wrinkles can be prevented, but the drainability is deteriorated. Therefore, the offset amount (S) /
The roll diameter (D) is in the range of 0.4 to 0.9.

Roll gap (G): When the distance between the upper and lower rolls is less than 0.1 mm, the contact area between the metal foil strip and the roll becomes large, so that wrinkles easily occur. Further, if it exceeds 10 mm, the contact area becomes small and the water draining property deteriorates. Therefore, it is desirable that the roll gap be 0.1 mm or more and 10 mm or less.

Next, examples of the present invention will be shown, which are merely examples of the present invention and do not unduly limit the present invention.

Example A metal foil strip made of stainless steel (thickness 0.02 mm, width 400 mm) that had been cold-rolled and then alkali-cleaned was drained using the same drainer as shown in FIG.

As a comparative example, using a roll having a roll diameter of 200 mm, the metal foil plate was drained by the apparatus arranged as shown in FIG. 2 to examine the drainability of the metal foil strip and the occurrence of wrinkles on the surface. The drainage property was evaluated by the average film thickness of the adhered water on the metal foil strip before and after draining, and the wrinkles on the surface were evaluated by visual observation of the surface.

The results are shown in Table 1.

As can be seen from Table 1, it is apparent that the water-removing roll according to the present invention is excellent in water-removing property of the metal foil strip and can prevent the generation of surface wrinkles.

(Effects of the Invention) The present invention is merely a draining roll in which the rolls are arranged offset in two directions, ie, the winding direction of the metal foil strip and the direction perpendicular to the surface, but the metal foil has a simple construction. It is possible to reduce the tension and pressing force generated in the strip, and without the troublesome control of synchronizing the rotation peripheral speed of the take-up roll and the draining roll, which had to be performed in the past, the draining property can be improved. It is possible to reliably prevent the generation of wrinkles without damaging them.
Further, it is possible to reduce the occurrence of defective products in the final manufacturing process of the product, and the significance of the present invention from the practical point of view is remarkable.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a drainer of a drainer according to the present invention; and FIG. 2 is a schematic sectional view of a drainer of a conventional drainer. 1: Metal foil strip 2, 3: Roll S: Offset amount L: Lap amount G: Roll gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-140318 (JP, A) JP-A-63-309317 (JP, A) Practical use Sho-63-202413 (JP, U)

Claims (2)

[Claims] 1. A drainer comprising a pair of upper and lower rolls in contact with the upper and lower surfaces of a continuously running metal foil strip, wherein the central axis of each of the upper and lower rolls is a metal foil. In order to satisfy L / D = 0.1 to 0.5 and S / D = 0.4 to 0.9 when the roll diameter D, the lap amount L, and the offset amount S are arranged at intervals in the running direction of the belt, A drainer for a metal foil strip, characterized in that the upper and lower rolls are arranged so as to be wrapped and spaced apart in the direction perpendicular to the surface of the metal foil strip. 2. When washing a continuously running metal foil strip with water,
A draining method for a metal foil strip, characterized in that draining is performed using the draining device according to claim 1 installed in a plurality of stages.