JPH0647403A - Method and device for finishing metallic foil - Google Patents

Abstract

PURPOSE:To continuously execute the removal of rolling oil and annealing of a rolled metallic foil by two lamination rolling and the handling of a separator and a slitter by executing flame treatment and also heat treatment on the inner surface side of the separated metallic foil on the surface of a heating roll. CONSTITUTION:The metallic foil which is passed through cooling rolls 2, 2' is slitted with a cutter roll 4 into a prescribed width and the metallic foil which is separated through a rubber nip roll 5, separating rolls 6, 6', etc., to cut off the influence of tension due to the flame treatment, slitting or the like is fed to the flame treatment stage of the respective inner surface sides. The flame treatment with burners 83, 84 is executed while bringing the flame-treated surfaces of the metallic foils into contact with adjustable temp. rotary rolls 3, 3' in the adhered state. The heat-treated metallic foil is coiled to coiling rolls 9, 9' after cooling with water cooling rolls 7, 7' or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin metal foil after being rolled in two layers (the thickness of the metal foil in the present invention is about 6 .mu.m.
It means a metal foil or a metal thin plate having a thickness of about m to 200 μm. ) Is continuously separated, cut into a predetermined width and length, the rolling oil adhering to the surface thereof is removed, and at the same time a heat treatment is possible, and a device used therefor.

[0002]

2. Description of the Related Art Many metals are relatively inexpensive and have excellent mechanical suitability for their price. As an inexpensive conductive material, they are also excellent in chemical corrosion resistance and decorativeness for precious metals. Therefore, it is widely used as an industrial material, an electrical material, etc.

In particular, in the fields of packaging materials, electrical materials, daily necessities, ornaments, industrial materials, etc., a large amount of metal foil (about 5 μm to 200 μm) is produced for use therein.

In these metal foils, generally, a slab-shaped metal is rolled using a roll, and a thin metal foil is rolled in two layers. The surface of the rolled metal foil was used during rolling. It is covered with rolling oil and often becomes an obstacle in secondary processing of metal foil such as printing and lamination. For this reason, it is usual to separate the foil using a separator, and then to anneal the metal foil cut into a predetermined size through a slitter, which also serves as degreasing (removal of rolling oil). This annealing is often performed with the metal foil wound in a coil.

For example, the removal of rolling oil from aluminum foil (which means aluminum or aluminum alloy foil) is currently carried out by so-called batch annealing in which a long-time heat treatment is performed in a coil shape. At this time, the type of rolling oil becomes a problem as a factor affecting the processing temperature and time for removing rolling oil by batch annealing, and the width and rolling diameter of the product,
Roll hardness has a great influence. Aluminum foil, in particular, has recently become more and more demanding for wide and long products, but this is in the direction of increasing resistance to loss of rolling oil from the coil, and in order to completely remove rolling oil. Will require higher temperatures and longer times than required for heat treatment.

Especially, in the rolling oil in the central portion of the coil in the central portion of the aluminum foil width of the wide and long product, it is lost from the outer surface and the clearance is small (when the winding hardness is hard). Since the distance is long, the heat supply is small, and the loss resistance is large, it becomes difficult to ensure the uniformity of the surface characteristics in the width direction, and in order to ensure the uniformity, annealing at high temperature for a long time is required. Therefore, batch annealing that greatly exceeds the heat treatment time required for annealing the aluminum foil is required.

Therefore, it is necessary to completely remove the rolling oil,
A material having high rigidity (for example, 3003, Al-Fe system) (Alloy), the aluminum strip that has been coil-annealed for a long time is still softened and a decrease in mechanical strength is unavoidable, causing various problems.

Therefore, in the production of a highly rigid aluminum foil, the oil adhering in the rolling process is naturally evaporated during the winding process such as the separator or slitter after rolling, or the corona is added immediately before the processing such as printing or bonding. Electric discharge treatment and anchor coat treatment have been applied to remove the effects of rolling oil residue. In this case, since the effect of the corona discharge treatment becomes weaker with the lapse of time after the treatment, there is a limitation that the treatment should be performed immediately before the next step. Further, the anchor coat treatment has a demerit that the apparatus and the process such as a solvent recovery device are complicated for the application of the anchor coat agent, the evaporation process of the solvent, and the environmental protection, and further improvement is required.

The separator used in the manufacturing process of the aluminum foil mainly has the function of rewinding the rolled aluminum foil into a single aluminum foil, winding it into a predetermined width, and winding it into a predetermined winding length. It is a device that is only used for cleaning and is not related to the degreasing process.

Further, the slitter is a device merely having a function of inserting an aluminum strip such as a soft foil or a hard foil into a predetermined width and winding it into a predetermined winding length. It is an unrelated device.

Therefore, when there is a large amount of residual oil after rolling, or in an aluminum strip that is not sufficiently degreased in a batch annealed product (a process of rolling at a high temperature for a long time),
In the former, it was necessary to change the batch annealing time to a long time, and in the latter, rebatch annealing was required.

With respect to degreasing, the batch annealing method has the best cost performance and is reliable at present. Therefore, almost no other method is industrially adopted. However, while most of the other metal foil manufacturing processes are continuous, batch annealing is a batch process at this part as indicated by the word, so it temporarily stops and becomes a neck point of the manufacturing process. (For aluminum foil manufacturing, 1/3 of the manufacturing lead type)
Occupy ).

As can be seen from the above description, the degreasing treatment of a metal foil by batch annealing requires a large amount of time during the manufacturing process, which is a factor that greatly reduces productivity. Since the surface characteristics of the alloy are non-uniform in the width direction, and even when it is not desired, softening due to annealing of metal materials is unavoidable, etc., and the development of a processing device that can overcome these has been desired. .

[0014]

DISCLOSURE OF THE INVENTION The present invention is a method for continuously performing rolling oil removal of a rolled metal foil which has been double-rolled, annealing of the metal foil, treatment of a separator and a slitter, and the surface characteristics of the product ( Degreasing degree, oxide film thickness, etc.) is highly uniform across the width and length of the metal foil, and a continuous metal foil with high productivity that can significantly reduce batch annealing time even when annealing is required. The purpose is to develop a finishing method and equipment suitable for it.

[0015]

Means for Solving the Problems That is, according to the present invention, the front and back surfaces of a metal foil rolled in two layers are subjected to a flame treatment on the surface of a cooling roll backup roll, and then separated, and then separated. The inner surface side of each of the metal foils on the surface of the heating roll backup roll is subjected to flame treatment and heat treatment,
Metal foil finishing method characterized by producing a width-filled single metal foil, and A: uncoiler, B: cooling roll backup roll with burner for frame treatment, C: cutter for width-setting, D: frame treatment. The above-mentioned object was achieved by developing a metal foil finishing device characterized by having a heating roll backup roll equipped with a burner for heating and E: a winding coil.

The present invention will be described below with reference to the drawings. The metal foil which is the subject of the present invention is a soft metal such as aluminum, copper or an alloy thereof, a low melting point metal, a noble metal such as gold, silver and platinum, a relatively hard metal such as iron and stainless steel, and a rolled metal having a high melting point. Made metal foil (about 6 to 200 μm)
Target. In particular, it is preferably used for a metal foil of a soft low melting point metal such as aluminum or a noble metal.

The present invention will be described below with reference to FIG. 1 for the apparatus. The apparatus of the present invention can be conceptually considered to be one in which a separator, a heat treatment apparatus incorporating a degreasing step, and a slitter are integrated, but is characterized in that the annealing step is integrally incorporated and made continuous. The metal foil rolled in two layers is wound into a coil and passed through the uncoiler 1 through a swing roll having a function of preventing wrinkles and keeping the length of the path from unwinding constant, and then a cooling roll that rotates at high speed 2. While being in close contact with the surface of 2 ', both front and back surfaces thereof are subjected to the flame treatment of burners 81 and 82.

The cooling rolls 2 and 2'are rolls having a smooth surface with a diameter of at least 150 mmφ, preferably 250 mmφ or more.

The angle of wrapping of the metal foil around the cooling rolls 2, 2'is at least 120 ° or more, preferably 180 °, in order to prevent the metal foil from wrinkling and to prevent the metal foil from being overheated due to floating from the surface of the rotating roll. It is preferable that the metal foil and the roll surface are brought into close contact with each other by using an auxiliary roll or the like so that the angle may be smaller (when the roll diameter is large, the angle may be smaller).

The burners 81 and 82 are not particularly limited in their types such as gas burners and oil burners, but in the case of aluminum foil or the like, they are flames having a temperature (about 1800 ° C.) much higher than their melting point (about 600 ° C.). The amount of energy supplied per unit area of metal foil and the degree of adhesion to a rotating roll are extremely important. Therefore, a swing roll and a tension roll for keeping the winding angle of the metal foil constant should be used to ensure close contact with the rotary roll.

The amount of energy supplied per unit area of metal foil is determined by the metal material, the thickness of the foil, the type of rolling oil, the amount of residual oil on the surface of the rolled metal foil, the target contact angle with pure water (frame treatment). The remaining allowable ratio of oil after), the allowable annealing degree, etc. must be taken into consideration, but generally 0.1 to 0.1
It is about 10 kcal / m ² (one side). When more precise conditions are needed, it can be determined by a simple test.

The temperature of the rotating rolls 2 and 2 ′ whose temperature can be adjusted is, for example, a water-cooled roll, which is a low temperature such as about 40 ° C. or less for aluminum foil. Further, this frame treatment may be performed once, but the degreasing degree can be increased by subjecting the same surface to frame treatment at two or more places.

The metal foil that has exited the cooling rolls 2 and 2'is given a predetermined width by a cutter roll 4 (however, it may be in any of the final finishing steps in terms of location), frame treatment,
The metal foil separated through the rubber nip roll 5, the separate rolls 6 and 6 ′ for cutting the influence of the tension of the slits and the like is sent to the frame processing step on the inner surface side of each.

The frame treatment on the inner surface side of the metal foil is carried out by using a rotating roll 3 capable of adjusting the temperature of the frame-treated surface of the metal foil.
The burner 83, which is in close contact with the surface of the 3 ',
The frame treatment is performed by 84, but when a hard foil is required, it is preferable to perform the flame treatment on the surface of a cooling roll, for example, a water-cooled roll, and when annealing is desired, a heating roll,
For example, flame treatment may be performed on the roll surface adjusted to a temperature of about 400 ° C.

Compared to the surface side, the amount of rolling oil deposited on the inner surface of the metal foil is generally small, so one frame treatment is sufficient, but multiple frame treatments may be performed if necessary due to heat treatment or the like. It doesn't matter.

When sufficient annealing is required, the metal foil is followed by temperature-adjustable rotating rolls 3 and 3'and then in a temperature-controlled oven (not shown) in a zigzag pattern. You may pass it through and anneal.

In the frame treatment of the present invention, the surface of the metal foil running on a single sheet is treated with a high-temperature frame, so that there is no resistance to loss of rolling oil as compared with the case of batch annealing. Can be processed at a high price.

The heat-treated metal foil is cooled by, for example, water-cooled rolls 7 and 7 ', and then wound on take-up rolls 9 and 9'.

Although the processing speed varies depending on various factors, a processing speed of up to 500 m / min is usually sufficient. Since the frame processing part becomes hot, it is necessary to attach an exhaust heat device so that heat does not stay, or to take measures so that the heat can be shut off.

By the flame treatment, the rolling oil is greatly reduced and a degreased hard or soft metal foil is obtained. If the degreasing degree is insufficient in this treatment, or if the annealing by the flame treatment is insufficient, a further ordinary batch annealing may be performed. In this case, the annealing time for removing rolling oil should be reduced. The annealing time can be set instead of the setting, and the batch annealing time can be significantly shortened.

Another feature of this frame processing product is that
Like the batch annealed product, the metal foil has good uniformity in the surface characteristics in the width direction and the length direction (water wettability, oxide film thickness, etc.) and is capable of continuously producing a degreased metal foil at a high speed. The metal foil finishing device is a device that makes this possible.

[0032]

The metal foil or the separated metal foil to which the rolling oil rolled up by rolling two sheets is attached is adhered to the surface of the water-cooled roll or the temperature-adjustable outer diameter of 150 mmφ rotating roll. This is a metal foil finishing method that incorporates a device for removing rolling oil by treating the surface with a high temperature frame.

In this case, the frame surface of the metal foil is about 1800.
Although it is exposed to a high temperature such as ℃, the other surface is in contact with a water-cooled roll or a temperature-controlled rotating roll. It is estimated that the oil will be incinerated or volatilized.

In particular, the present invention is an apparatus having a built-in frame processing apparatus with a large amount of energy supply. Therefore, the metal foil is continuously separated, put into a given width and cut into a given winding length, and the surface thereof is cut. This is a method of finishing a metal foil that removes the rolling oil adhering to the surface of the metal foil and can be annealed at the same time or can be annealed.

[0035]

[Example] 1N30 having a width of 1000 mm obtained by rolling two sheets
The aluminum foil was subjected to finishing treatment using a device as shown in FIG.

The outer diameter of the water-cooled rolls 2, 2'is 250 mm
φ, 300 ℃ and 350 ℃ adjustable temperature rolls 3 and 3'also have the same outer diameter, and between these rolls 3 and 3'and water-cooled rolls 7 and 7 '
An oven having a traveling distance of 3 was provided, and flame treatment and heat treatment were continuously performed at a treatment speed of 300 m / min. The results are shown in Table 1.

[0037]

[Table 1]

[0038]

The metal foil finishing method of the present invention has the following effects. (1) The separate step, the slit step, the degreasing step, and the annealing step can be continuously performed all at once, and the lead time can be greatly saved even if the degreasing step by batch annealing is additionally required. (2) Since it is a degreasing treatment by flame treatment, the surface characteristics (water wettability, oxide film thickness, etc.) in the width direction and the length direction are better than in batch annealing, and high-speed treatment is possible. (3) Pretreatment for laminating the soft foil can be performed, and pretreatment such as corona discharge machining on the user side is unnecessary. (4) By subjecting the hard foil to a frame treatment on a heating roll, the hard foil is changed to a semi-hard foil or a soft foil, and a degreased metal foil is obtained. This flame treatment is a short time heating,
Because of cooling, it is possible to manufacture a metal foil having strength equivalent to that of CAL.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a metal strip slitter of the present invention.

[Explanation of symbols]

 1 Uncoiler 2 Cooling Roll 2'Cooling Roll 3 Temperature Adjustable Rotating Roll 3'Temperature Adjustable Rotating Roll 4 Cutter 5 Rubber Nip Roll for Tension Cut 6 Separate Roll 6'Separate Roll 7 Water Cooling Roll 7'Water Cooling Roll 81 For Frame Treatment Burner 82 Burner for flame treatment 83 Burner for flame treatment 84 Burner for flame treatment 9 Winding roll 9'Winding roll

Front page continuation (72) Inventor Eizo Isoyama 6-224 Kaiyamacho, Sakai City, Osaka Prefecture Showa Aluminum Co., Ltd.

Claims (4)

[Claims] 1. A front surface and a back surface of a metal foil rolled in two layers are subjected to a frame treatment on the surface of a chill roll backup roll, and then separated, and then the inner surface side of each of the separated metal foils is treated. A metal foil finishing method, characterized in that a frame treatment and a heat treatment are performed on the surface of a heating roll backup roll to produce a width-inserted single metal foil. 2. The inner surface side of each of the separated metals is subjected to a flame treatment on the surface of a heating roll backup roll and is passed through an oven.
The metal foil finishing method described. 3. A: uncoiler, B: cooling roll backup roll equipped with a burner for flame treatment, and C:
A metal foil finishing device having a width cutter, D: a heating roll backup roll equipped with a frame treatment burner, and E: a winding coil. 4. The metal foil finishing apparatus according to claim 3, further comprising a heating roll backup roll provided with a flame treatment burner and a heat treatment oven after the backup roll.