JPS60186580A - Continuous adhesion with heat between metal foil and sheet - Google Patents

Abstract

PURPOSE:Metal foil with a large expansion coefficient and a sheet of metal are continuously heated and laminated with pressure rolls to produce a composite material free from wrinkles on the foil. CONSTITUTION:Metal foil with a large expansion coefficient, preferably aluminum foil 4 is heated on its surface coated with an adhesive, as being allowed to run, then the heated foil is laminated to a sheet of steel 2 which is continuously fed with pressure rolls. Preferably, the sheet is heated while running, before it is fed to the pressure roll 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous heat bonding method for bonding sheet-like objects such as metal foils and metal sheets, and particularly for bonding metal foils with a large coefficient of thermal expansion such as aluminum foils to metal sheets such as steel plates. The present invention relates to a heat bonding method that prevents wrinkles from occurring in metal foil when manufacturing a composite material by continuously bonding metal foils such as No. 1- and the like.

Conventionally, by running metal foil such as aluminum foil and sheet-like materials such as metal sheets such as steel plates, and continuously laminating them together, a composite material (laminated + A) having the characteristics of each material is produced. It is manufactured and, according to its excellent properties, is used for various purposes, such as construction, automobiles, vehicles, etc.
It is used as a material in fields such as home appliances.

By the way, when bonding such a metal foil and a sheet-like object such as a metal sheet, the metal sheets 1 to 1 are run and heated as necessary, while the bonding surface of the metal foil is A method was adopted in which the desired bonded JFA was continuously manufactured by applying a specified adhesive to the laminates, overlapping them, and pressing them together with a pressure roll under heating conditions. In order to achieve good crimping and bonding between the metal foil and the metal sort, such a crimping roll is made of a sheet material such as a metal sheet that is actively heated or continuously guided. Due to heat conduction, it reaches a considerably high temperature.

For this reason, when a metal foil such as aluminum foil with a high coefficient of expansion j′ comes into contact with such a high-temperature pressure roll, the gold foil will stretch in its width direction due to thermal expansion.
Moreover, this long-term expansion due to expansion;
It even reaches III.

Since the supplied metal foil is restrained by the rolls, it cannot stretch freely in the width direction, and the expansion caused by moxibustion causes wrinkles, C1 and the like. If the bonded product is crimped directly under the roll with wrinkles still generated, the appearance of the bonded product becomes poor, and this is a major factor in reducing the !111i value of the product.

For this reason, conventionally, in order to remove such wrinkles, an expander roll is applied to the metal foil supplied to the pressure roll to tighten it. This expander roll is a roll with a middle height in the widthwise center part, and wrinkles are removed by adjusting the height of the middle part. However, although the forceful Conito Spanda Roll is effective in removing wrinkles from the metal foil before it comes into contact with the crimping roll, the double problem of wrinkles occurs when the metal foil comes into contact with the crimping roll. Expander rolls were completely powerless against this type of damage, as they occur naturally.

Here, the present invention has been made in response to such circumstances, and its gist is that a metal foil with a large coefficient of thermal expansion and a predetermined metal sheet (...) In the method of continuously heating bonding and tightening while running the metal foil, a prescribed adhesive for the metal foil described in 1 is applied. The heated surface is heated by irradiating it with infrared rays, and then the applied metal foil is superimposed on the sheet-like material that is continuously supplied, and is placed on a pressure roll under the applied condition. This method effectively eliminates wrinkles in the metal foil caused by high-temperature pressure rolls.

The present invention will be further described below with reference to the drawings.
This will be explained in Section 11I.

In FIG. 1, a steel plate 2 as a predetermined sheet-like material,
It is relatively thick compared to the aluminum foil 4, which is a metal foil with a large coefficient of thermal expansion, which is to be bonded to this. Continuously apply a predetermined temperature to the bottom; Hit-L! is turned off.

On the other hand, an aluminum foil 4 coated in advance with an adhesive that can be melted and bonded at a predetermined high temperature, such as a hot melt adhesive, is continuously supplied from an aluminum foil coil 8 to a pressure roll 10. guided by the above-mentioned heated &'1
(4Fj, 2 is matched, and the 1ζ is crimped and bonded to the crimped coal 10 continuously.

Further, the pressure roll 10 is kept in a heated state in order to completely melt the adhesive applied to one side of the aluminum foil 4, and a trol equipped with a heater is generally used. That will happen. Note that, depending on the type of adhesive, there is no need to actively heat the pressure roll 10, and as described above, the heat of the preheated steel plate 2 alone may be sufficient for bonding. Even when this pressure roll IO is not actively heated, contact heat conduction between the preheated steel plate 2 and the roll causes the pressure roll 1
0 is a high temperature exceeding 100°C when operated continuously.

In the present invention, prior to superimposing the aluminum Wf4 on the steel plate 2, as shown in the figure, an appropriate infrared irradiation means ζ such as an infrared heater I2 is used to heat the aluminum Wf4. Ni4
It is intended to heat the adhesive side of the
By heating with such infrared irradiation, the crimped U-ru 1
The aluminum foil 4 supplied to 0 is :nJ W! +'t indicates that the pressure roll lO is a heat roll or that the contact from the steel plate 2 is jQJHi,'J
) When the temperature is high due to conduction, large thermal expansion is caused in the aluminum 7f4 due to the contact fQ# of the pressure roll 10 at such a high temperature.
Therefore, the steel plate 2 and the aluminum foil 4 are bonded by the pressure roll 10.
This effectively eliminates the occurrence of wrinkles during crimping and bonding.

The aluminum foil 4 is thermally expanded in the width direction by being heated with infrared rays before being supplied to the pressure roll 10. This is because when they come into contact, a larger thermal expansion will not be caused by the contact.

In heating the aluminum foil 4 by irradiating infrared rays, it is necessary to irradiate the side of the aluminum foil 4 with the adhesive applied by coating or the like with the infrared rays.

By heating the aluminum foil 4 from the side to which the adhesive is applied, it is possible to effectively utilize the good infrared absorption property of the polymeric material constituting the adhesive. This is because heating can be performed effectively. In addition, bare aluminum foil 4 with no adhesive applied
The surface of this material has the property of reflecting infrared rays, and it is not a good idea to irradiate such a bare surface with infrared rays.

Incidentally, using this exemplary device, the steel plate 2 is 1.6
m++ thickness It was confirmed that a good steel plate/aluminum foil composite plate could be continuously obtained.

Note that a polyolefin thermoplastic adhesive is applied to the aluminum foil 4 in advance as an adhesive, and the infrared heater 12 is heated with two 750 W An infrared heater is used to irradiate the aluminum foil 4 with infrared rays.
is heated and supplied to the pressure Jl', l-l (l. Also, the bonding conditions with the pressure roll 10 are temperature:
170℃, crimp crab 500 kg, speed: O, 6m
It was 7 minutes.

As described above, according to the present invention, the metal foil that is supplied to the high-temperature pressure bonding 11-ru and overlapped with a sheet-like object such as a predetermined metal sheet is preliminarily irradiated with "C'JJ". Since the force of 1 silicon is applied, even if such a metal foil is fed to a pressure roll, it will not cause a large thermal expansion and therefore wrinkles will occur in the foil. Therefore, there is no possibility that wrinkles will occur on the product (composite board) and the product (+lIi value will decrease) by bonding the metal foil and the sheet-like material such as metal sheet. , its appearance can be significantly improved, and this is where the major advantage of the present invention lies.

In the embodiment described in Section Ix, the present invention was applied to adhesion between an aluminum foil as a metal foil and a steel plate as a metal sheet. This method can also be used for adhering large metal foils, and of course can also be applied to sheets made of materials other than metals.

As described above, the present invention is not to be construed as being limited only to these illustrative specific examples; however, various changes, modifications, and changes may be made based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Improvements etc. can be made, and the present invention also includes those embodiments;
It goes without saying.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view showing an example of a crimping device that is effective in carrying out the method of the present invention. 2: Steel plate 4 Ni aluminum foil 6: Heater 8 Ni aluminum foil coil

Claims (4)

[Claims] (1) A method in which a metal foil with a large 4H;H expansion coefficient and a predetermined sheet-like material are continuously bonded by heating while running, and a surface to which a predetermined adhesive is applied while the metal foil is running. irradiate infrared rays to heat the
Next, the heated metal foil is placed on the continuously supplied sheets 1 to 1, and heated under heating conditions.
A continuous heating adhesive force method for bonding a metal foil and a sheet I-shaped object, which is characterized by crimping and bonding using two pressure rollers. (2) The method according to claim 1, wherein the metal foil is aluminum foil and the sorted material is a steel plate. (3) While the metal foil is running, the surface to which the adhesive is applied is irradiated with infrared rays from an infrared heater at t=j.
The method of the 4 connoisseurs. (4) The method according to any one of claims 1 to 3, wherein the sheet-like material is heated and compressed while running before being supplied to the pressure bonding wheel. .