JPH02286236A - Adhesion method of metallic foil and device therefor - Google Patents

Abstract

PURPOSE:To enable foil-sticking to be achieved economically, while its device and operation are simplified by running the shape-correcting and/or sticking unit of a foil belt in the stationary state of the foil belt. CONSTITUTION:While tension is applied to a metallic foil belt 1 longitudinally, the device unit to apply bending work repeatedly is run along the foil belt in the stationary state of the foil belt, whereby the shape-correction and adhesion thereof are continuously carried out. A bending tool is a small diameter roll 2, and said roll is backed up with a large diameter roll 2'. Since the foil belt rising from a base surface is bent so as to be again recessed to the base surface, the die 4 with the small radius of curvature of a tip is conveniently used. To bend the foil belt into recessed shape to the bass surface between upper and lower bending mechanisms, a large diameter deflector roll 3 is arranged, and the balance of the amounts of upper and lower bending works is planned to be kept. Then since the bending of the small degree of plastic work is necessary, the standard of the radius of curvature is set at 200 times or more of the foil belt. The roll 3 in the running unit is used as an adhesive- coating device, while an adhesive-feeding mechanism is added to the roll.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for flatly attaching a metal foil such as stainless steel to a rigid surface such as a steel plate, a building material board, or a metal form.

(Prior Art) For example, lamination of aluminum foil and plastic film is a well-known product and method. When laminating materials that are flexible in this way, the materials are run under tension, and the foil and film are brought into contact with a pair of nip rolls to achieve lamination without air bubbles being trapped. It can be done easily.

However, in order to perform various operations such as running a thin-phase material that does not easily break or stretch while applying stable tension, such as running it, feeding it out from a reel, and winding it up, advanced equipment technology including control is required, resulting in high equipment costs. Therefore, it is difficult to make a profit unless the production volume is large enough.

In recent years, various types of metals have been used, and stainless steel foil is particularly suitable for mass production, so its uses are expected to expand. Taking stainless steel foil as an example, one of its major uses is to make the surface stainless by attaching it to the surface of a rigid body.

(Problem to be solved by the invention) Now, it is not easy to obtain a flat surface finish by attaching stainless steel foil with a thickness of about 20μ to 200μ to a rigid body.The flatness of stainless steel foil is at a general level. If you think about it, the quality of the foil is good enough, but the standards required when pasting it onto a rigid surface are even higher, and if there are even slight undulations in the foil, it will affect the appearance and the soundness of the adhesive after pasting. Significantly lower. Therefore, either the shape of the foil is corrected to a higher degree and the foil is pasted while applying a slight tension, or the foil is pasted while maintaining its apparent flatness by applying a large tension, and the tension is maintained until adhesive strength is developed. You will need a way to keep it that way. Moreover, unless this can be achieved with simple equipment and operation, the economical point of view of foiling, in which only the surface is made of stainless steel, will not be satisfied.

(Means for Solving the Problems) The present invention involves applying tension in the longitudinal direction to the metal foil strip while keeping the foil strip stationary and running an equipment unit for repeatedly bending the foil strip to shape the foil strip. Straightening and pasting are carried out continuously.

Furthermore, the present invention provides an apparatus for carrying out the above method, which includes a unit of a work roll with a small diameter that bends the foil strip so as to be convex toward the substrate surface, and a back-up roll with a diameter of 2. A bending amount balancing deflector roll with a large diameter that is bent so as to be concave in the opposite direction, or a bending ball balancing deflector die with a large tip curvature radius;
A die with a small tip curvature radius that bends the foil strip concavely toward the substrate surface, or a unit consisting of a small diameter work roll and a large diameter backup roll, and a large diameter soft deflector that brings the foil strip into contact with the substrate surface. - A metal foil bonding device is proposed, which is characterized in that the rolls are arranged in sequence and the entire mechanism is mounted on a traveling device. or,
The present invention also proposes an apparatus in which an initiator mechanism is added to the deflector roll or die for balancing the amount of bending in the above apparatus, thereby making it possible to apply adhesive to the contact surface of the foil strip.

(Function) In the present invention, the metal foil strip is any metal or alloy such as stainless steel, nickel, copper, titanium, aluminum, etc.
It refers to a sheet material that is so thin that it is difficult to maintain structural rigidity by itself, and generally has a thickness of 0.2 mm or less.

In order to attach such foil to a substrate, it is essential to apply tension to the foil to a greater or lesser degree. Since it is necessary to apply tension, it is economical to attach a long foil strip to a long substrate or to a plurality of short substrates. Under such a premise, the usual method would be to move the base body, run 'f3@ in synchronization with the base body, and stick it with a deflector roll. However, running the foil strip while controlling the tension and unwinding it from the payoff reel itself requires sophisticated equipment, and with a rigid base, products must be picked up individually. , it is extremely difficult to apply tension on the exit side, and even if it were achieved, it would not be possible to achieve the economical efficiency that is essential for foil attachment. Therefore, in the present invention, the workpiece is kept stationary.

The repeated bending process applied to correct the shape of the foil strip is based on the premise of plastically deforming the foil.
The standard bending radius is less than twice that. Further, the tension to be applied to the foil at this time or the tension to be applied to the foil for pasting is selected as an appropriate value while looking at the shape of the foil, and one guideline is around η of the yield point.

Now, according to the method of the present invention, tension can be applied to the foil strip while it is stationary, so an extremely simple device can be used. For example, simply fixing the end of the foil strip to a reel of an appropriate diameter, tightening it two or three times, and indexing it using a constant torque lever is sufficient to achieve the purpose.

It does not require a complicated mechanism to attach a foil strip to a unit including a repetitive bending mechanism and/or a roll pasting mechanism and run the unit from one end of the foil strip to the other. For example, it is possible to run a winch using a rail as a guide. This method is sufficient. Manual running is also possible depending on the foil material and thickness.

By running a unit that includes a repeated bending mechanism and a roll pasting mechanism at the same time and pasting the foil while correcting the shape, the tension on the adhesive layer is smaller than when pasting the foil without straightening. There is little residual shear stress, which has a positive effect on the shape and durability of the pasted product.

It should be noted that although there is no harm in doing the shape correction and pasting operations of the present invention in separate steps, it is difficult to say that it is a good idea, as, for example, a separate mechanism is required to take off the shape-corrected foil strip. be.

When adhering foil, an adhesive must be interposed between the foil surface and the substrate surface. The adhesive and the adhesion schedule may be according to conventional methods, such as one-component adhesives such as rubber-based or vinyl-based adhesives, two-component adhesives such as epoxy or urethane-based adhesives, and heat-fusible adhesives such as modified polyolefin-based or polyester-based adhesives.
Methods include applying adhesive or prepreg to either or both surfaces of the foil strip or substrate, or interposing a sheet of adhesive or prepreg between the two, and bonding by curing at room temperature, accelerated curing by heating, heat melting/cooling operation, etc. I can do it. At this time, incidental operations such as pressing the foil against the substrate until adhesive strength is developed are preferably performed in accordance with known procedures.

Next, the first part about the apparatus for implementing the method of the present invention described above.
The simplest traveling unit for carrying out the method of the present invention, which will be explained with reference to FIGS.

It is better not to apply a large moment to the traveling unit that causes the foil strip to detach from the foil strip due to the tension applied from both ends of the foil strip, so the starting point for processing the foil strip should be close to the base surface. In the example where the foil is allowed to stand still, the first bending is preferably performed by standing up the foil so that it is concave toward the base surface. In this case, the surface that the bending tool comes into contact with will be the final product surface, so the foil surface must not be scratched, so the bending tool should be a roll 2 with a small diameter.6 The roll is easy to bend due to its small diameter, so Back up with a large roll 2 degrees. Steel is suitable as the material for these roll groups, and preferably chrome plating is applied.

As a result of the above, the foil strip that has risen from the base surface is bent again in a concave manner toward the base surface, but since the tool contact surface in this case is an adhesive surface, there is no fear of scratches. , a roll set may be used, but a die 4 with a small radius of curvature at the tip is more convenient.

The above-mentioned repeated bending operation is not geometrically symmetrical,
Because the amount of bending is not balanced, bending stress tends to remain. Therefore, a deflector with a large diameter is used to curve the foil strip concavely with respect to the base surface during the vertical bending mechanism.
Rolls 3 or deflector dies are arranged to balance the amount of vertical bending. In this case, the curvature must have a low degree of plastic working, so the radius of curvature is approximately 20% of the foil thickness.
It is 0 times or more.

In this way, the foil strip, which has been repeatedly bent vertically in a balanced manner,
A roll 5 is installed to contact the substrate without trapping air, but in order to bring the foil into exact contact with the surface of the rigid substrate, which is not perfectly flat, a soft roll coated with rubber or the like is required. Further, a tension force is applied to the foil strip, although it is small, and the soft roll surface receives a shearing force from the foil strip with a considerable surface pressure. Therefore, by increasing the diameter of the roll, it is possible to reduce the surface pressure and increase the supporting area.

The radius of this roll is also approximately 200 times or more the thickness of the foil.

The roll 3 for balancing the bending amount in the traveling unit becomes a suitable adhesive application device by adding a supply mechanism thereto. For example, if the roll is cut with vertical grooves and passed through a die 4 or the like that bends the foil strip coated with the adhesive concavely toward the substrate surface, uniform application of the adhesive can be easily carried out. By carving vertical grooves on the upper surface of the die as necessary, it is possible to control the amount of adhesive applied thinner and more uniformly. The excess adhesive removed by the die is collected in a tray 6 adjacent to the die.
can be collected and reused.

Examples of the drug supply mechanism include a drug supply header in which the receiver is connected to the tray 6 and a pump or a discharge pump having a head. In this case, depending on the characteristics of the adhesive, it is possible to reduce the viscosity by heating or to heat-fuse it as necessary.

(Example) Based on the configuration shown in Fig. 1, using the traveling unit shown in Fig. 2,
For multiple bases made up of 10 foamed resin boards 400mm x 800mm x 10mm thick arranged in series,
O, 1mm thick 5US304 stainless steel foil was pasted.

Here, the radius of curvature of the vertical bend in the unit in Figure 2 is 4
mm, and the diameters of the balance roll and the contact roll are each 1
00mm. In addition, a rubber-modified two-component epoxy resin adhesive was used as the adhesive.

The unit could easily travel at 1 m/ml, and by heating the foil to 80° C. while pressing it onto the substrate after pasting, it was possible to develop adhesive strength at 30 ml. As a result, an average pasting speed of 10 sheets/1 hour was obtained.

The tension required to achieve flat adhesion was 3 and 8 kg, respectively, depending on whether or not shape correction was performed using the method of the present invention.
/mm', and in the latter case, the foil pasted/pepped product slightly warped, but in both cases, no pasting defects such as air bubbles being trapped or floating occurred.

(Effects of the Invention) The present invention has a method in which the foil strip is left stationary and the shape correction and/or pasting unit is run, which makes the device and operation extremely simple, and provides an economical foil strip. This feature greatly benefits the design of various products in that it enables pasting.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the invention of claim 1, and FIG. 2 is a side view schematically illustrating the apparatus of the invention of claim 2. 1... Metal foil strip, 2... Work roll,
2'... Backup roll, 3... Deflector roll and coating roll 4... Deflector die, 3... Deflector roll and coating roll 5... Soft deflector roll, 6... Receiver 7. Payoff and tension reel, 8. Tension reel, 9. Traveling unit, 10. Wheel, 11.
...Rail, 12...Base. Written amendment to the procedure for 4 other persons JMi/2016 D/Mon/1/2013 36 Address related to the case of the person making the amendment Name (name) 4. Address of the agent

Claims (1)

[Claims] 1. Hold the metal foil facing the base, apply tension in the longitudinal direction of the metal foil, and sequentially bend the metal foil away from the base and bend it toward the base, starting from one end of the metal foil. After adding more than once,
Metal foil adhesion method 2 characterized by sequentially pressing and adhering metal foil onto a substrate A unit of a work roll with a small diameter and a backup roll with a large diameter, which bends the foil strip so as to be convex toward the substrate surface, and a foil A deflector roll with a large diameter for balancing the amount of bending that bends the strip so that it is concave toward the base surface, or a deflector die that has a large tip curvature radius for balancing the amount of bending, and bends the foil strip so that it is concave toward the base surface. A unit consisting of a die with a small tip curvature radius or a small diameter work roll and a large diameter backup roll, and a large diameter soft deflector roll for bringing the foil strip into contact with the substrate surface are arranged in order, and the entire mechanism is attached to the traveling device. Metal foil bonding device 3, characterized in that the metal foil bonding device 3 is equipped with a metal foil bonding device according to claim 2, characterized in that a feeding mechanism is added to a deflector roll or die for balancing the amount of bending processed.