JPS61244530A - Manufacture of composite metal plate - Google Patents

Abstract

PURPOSE:To prevent generation of rust on the edge and also a back flow of water spray by adhering a metal plate and a plastic film together, painting and cooling them with a water spray and removing the residual water of a finished product using an air spray when manufacturing a composite metal plate. CONSTITUTION:In the case of a laminated composite metal plate 22 composed of a synthetic resin layer 23 and a metal plate 24, a composite metal plate water-sprayed from a nozzle 26 is cooled while passing through a cooler. Then the plate is subjected to the removal of water by means of a pair of linger rolls 29, 29 of NBR. In spite of this procedure, water still remains on the edge of a finished product. Therefore, said residual water 45 is blown off with an air nozzle or a jet nozzle 46. A cooler 62 for composite plate 60 has a gradient provided in the finished product proceeding direction at the inlet. For this reason, a support roll or a pair of support rolls 63 are provided, thus preventing a back flow of spray water 64 into the preceding process of the cooler 62.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is a laminated metal plate in which a synthetic resin layer is bonded or fused to one metal plate, or a laminated metal plate in which a synthetic resin layer is bonded or fused to one metal plate, or two metal plates are bonded or bonded to each other with a synthetic resin layer interposed therebetween. The present invention relates to a method for manufacturing sand-inch metal plates and the like (hereinafter collectively referred to as "composite metal plates") that are bonded or fused together, and particularly to a method for cooling the composite metal plates after bonding in the manufacturing process.

More specifically, the present invention makes it possible to almost completely remove water by blowing air from an air nostle after a cooling device that uses water to cool down a metal plate and plastic after bonding them together. Furthermore, if desired, by installing a support roll at an appropriate distance in front of the cooling device, it is possible to prevent the backflow of spray water from the cooling device to the previous process and to prevent buckling in the width direction of the product due to cooling. Regarding.

(Prior art) In recent years, a large amount of composite metal plates such as laminated metal plates and sand-inch metal plates have been used as interior and exterior materials for automobiles, vehicles, and construction materials for the purpose of corrosion resistance, beauty, vibration damping, and weight reduction. It is used in

In the production of these composite metal plates, there is a heating process for the metal plate or synthetic resin layer, and then they are laminated or sandwiched as appropriate to form a finished product. There is a cooling step after the process or after the sand inch process.

The conventional cooling method is to spray water on the product and then drain it using a ringer roll.In addition, in order to prevent the spray water from flowing back into the previous process in the cooling device, a Methods such as installing an air blower step or incorporating a ringer roll on the inlet side of the cooling device were adopted.

However, in the case of such conventional methods, water remains at the edges of the composite metal plate that has passed through the cooling device and the ringer roll, and even if a hot air dryer of normal capacity is used in the subsequent process, this edge area remains. The remaining water is not removed and the product flows to the downstream process, causing problems such as rusting on the product. In this respect, if it is attempted to forcefully dry the remaining water at the edge of the product after passing through the ringer roll using a dryer, a dryer with an excessive capacity will be required, which is economically disadvantageous.

If so, install an air nozzle on the inlet side of the cooling system and blow air.
However, according to the experience of the present inventors, the former method is not effective considering the noise of the air blower. On the other hand, in the latter case, the spray water flows back through the gap between the edges of the composite metal plate, and when the temperature of the product reaches a high temperature of about 200°C, it becomes difficult to select the roll material. It was.

It goes without saying that if the spray water flows back into the previous process, it will have an adverse effect on the heating device, laminate apparatus, and sanding apparatus in the previous process, and will also have an adverse effect on the quality of the finished product.

(Problems to be Solved by the Invention) Thus, an object of the present invention is to provide a cooling method for manufacturing a composite metal plate, which eliminates all of the drawbacks of the conventional methods mentioned below.

(Means for Solving the Problems) Here, the gist of the present invention is that when a metal plate and a plastic film are laminated or coated to form a composite metal plate and a composite metal plate is manufactured continuously, This method of manufacturing a composite metal plate is characterized in that the plate and a plastic film are laminated or painted, then cooled by water spray, and then residual water at the edges of the product is removed by air spray.

Note that a support roll of the composite metal plate may be provided at a position prior to cooling by water spray to prevent backflow of water from the water spray.
Further, in that case, the support roll may be spaced apart from the cooling point of the cooling device by a distance sufficient to prevent buckling in the width direction of the product.

(Function) Hereinafter, the present invention will be specifically described by way of examples with reference to the accompanying drawings.

In the following, the synthetic resin material is supplied by a method of laminating a film, but the present invention can also be applied to an adhesion method that involves applying a synthetic resin adhesive using a roll coater or the like, followed by heating and drying. It will be readily understood by those skilled in the art.

FIG. 1 is a schematic process diagram illustrating the present invention in detail.

The illustrated example shows a process diagram for manufacturing a two-layer laminated metal plate by bonding a metal plate 1 and a plastic film 2 together. The same applies to the 3N laminated metal plate, but a two-layer laminated metal plate will be described below as an example. In the figure, after the metal plate 1 and the plastic film 2 are heated by an appropriate heating means such as a pair of heating rolls 3 and are pasted together, a cooling device 4 using water spray is applied.
cooled down. According to the present invention, following cooling by water spray, residual water from the edge portions of the bonded metal composite plate is removed by air spray from the air nozzle 5, and then the bonded metal composite plate is wound onto a winding roll 6.

In the illustrated example, a pair of support rolls 7 is provided prior to the cooling process to prevent backflow of water spray.

FIG. 2 is an explanatory diagram partially enlarging the cooling process using water spray, in which the inside of the cooling device 20 is shown as a composite metal plate 22 (a laminated metal plate made of synthetic resin N23 and a metal plate 24 is shown). is passed through, cooling is performed by a water spray 28 from a nozzle 26, and water is drained by a pair of ringer rolls 29 on the exit side. ringer
The upper roll 29 of the roll pair is of a variable pushing amount type.

FIG. 3 schematically shows how residual water is generated at this time.

In the illustrated example, residual water 30 is attached to the lower side of the synthetic resin layer 23.

For example, in the case of a laminated composite metal plate 22 consisting of a synthetic resin layer 23 and a metal plate 24 like two series, the composite metal plate is cooled by water spray from the nozzle 26 while passing through the cooling device, and the composite metal plate is cooled by water spray from the nozzle 26. Even if water is drained by a pair of ringer rolls such as
water remains. In order to remove this residual water 30, an air nozzle or a diene nozzle is installed downstream of the cooling device as shown in FIG. 4 or FIG. 5, which will be described later.

FIG. 4 is a schematic perspective view showing how residual water is removed by nozzle blowing in the case of a laminated composite metal plate.
After passing through the cooling device and the ringer roll, residual water 45 remaining on the product edge portion 44 is blown away by an air nozzle or jet nozzle 46 and removed.

FIG. 5 is a schematic perspective view showing the removal of residual water by nozzle blowing in the case of a sand-inch composite metal plate, and shows a composite metal plate in which a metal plate 51 is bonded to a metal plate 53 through a synthetic resin layer 52. Even after the plate 54 has passed through the cooling device and the ringer roll, residual water 56 remaining on the product edge portion 55 is removed by blowing it off with an air nozzle or jet nozzle 58.

Note that in Figures 2 and 4, the width of the synthetic resin layer is wider than that of the metal plate;
In the figure, an example is shown in which both the outer metal plates are made of sand-inch composite metal plates that are wider than the synthetic resin layer.
There is no particular restriction on the width of each material, and there is no particular restriction on the material itself, such as metal or synthetic resin.

Furthermore, the method of the present invention can be applied to the upper and lower layers, the number of layers, and their material composition without any limitations. Preferably, the angle of the air nozzle is 15 to 60 degrees with respect to the direction of movement of the product, and the air nozzle pressure is 2 to 5 kg/cm''G.

However, the specific spraying is not limited only to the form.

Next, FIG. 6 is a diagram illustrating another modification of the present invention that prevents the spray water in the cooling device from flowing back to the front cooling process side.

In the figure, a support roll or a pair of support rolls 63 is installed to provide a composite metal plate 60 such as a laminated composite metal plate or a sand-inch composite metal plate with a downward slope toward the product progressing direction at the entrance side of the cooling device 62. This prevents the spray water 64 in the cooling device 62 from flowing back to the front process side of the cooling device 62. ringer roll 68
The downward slope of the composite metal plate 60 between the support roll 63 and the support roll 63 is preferably about 5 to 20 degrees. Vertical cooling device (
(not shown), this downward slope is 90 degrees. According to this, backflow can be completely prevented, but it becomes difficult to drain water in the cooling device.

In this case, the distance between the support roll or pair of support rolls 63 and the pair of ringer rolls 68 (shown as "17'' in FIG. 6) is important, and If the length is not 1 m or more, buckling will occur in the width direction of the product due to rapid cooling, and further folding will occur due to the reduction of the ringer roll, which will cause a decline in the quality of the product and damage to the ringer roll, etc. In this case, the distance is determined only by the cooling temperature drop difference, regardless of the line speed of the product, because it is due to a buckling phenomenon in which the width of the product shrinks due to cooling.

If the distance I7 is too short, the cooling temperature difference in the cooling device becomes too large and buckling cannot be avoided, but on the other hand, making it longer is not a good idea as it only unnecessarily increases the line length. Generally, under normal conditions, this rLJ is suitably 1 m per 100° C. temperature drop in the cooling device.

Thus, according to the present invention, even when cooling is performed by auto spray, no residual water remains on the product, and therefore, rusting at the edges can be completely prevented, and furthermore, backflow of water spray can be prevented. Furthermore, buckling in the width direction can also be suppressed.

(Effects of the Invention) As described above, the present invention is an excellent method that eliminates the drawbacks of conventional cooling methods in manufacturing composite metal plates and can exhibit the required cooling function. As already mentioned, it will be clear to those skilled in the art from the following explanation that the same effect can be obtained by a coating method using a roll coater or the like.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing each step of the method of the present invention; Fig. 2 is an explanatory diagram showing the cooling process by water spray; Fig. 3 is a diagram showing the edges of the laminated composite metal plate product. A front view showing residual water; Fig. 4 is a perspective view showing how residual water is removed by an air nozzle at the edge of a finished product of a laminated composite metal plate; Fig. 5 also shows a case using a sand-inch composite metal plate. A perspective view; and FIG. 6 are explanatory diagrams showing an aspect of preventing backflow of water spray water. ■ = Metal plate 2 Niblastic film 3: Addition 1% roll pair 4: Cooling device 5; Air nozzle 6: Take-up roll 7: Zabo 1 ~ roll pair Applicant Sumitomo Metal Industries Co., Ltd. Igeta Steel Sheet Co., Ltd. Agent Patent attorney Akira Hirose - Figure 1 Figure 2 1'o r+

Claims (3)

[Claims] (1) When continuously manufacturing a composite metal plate by laminating or painting a metal plate and a plastic film, the metal plate and plastic film are laminated or painted and then cooled by water spray. A method for manufacturing a composite metal plate, which comprises: removing residual water from the edges of the product by air spraying. (2) The method according to claim 1, characterized in that a support roll of the composite metal plate is provided at a position prior to cooling by water spray to prevent backflow of water from the water spray. 3. A method according to claim 2, characterized in that the support roll is spaced far enough from the cooling point of the cooling device to prevent buckling in the width direction of the product.