JPH08117664A - Coating apparatus - Google Patents

Abstract

PURPOSE: To eliminate the thickness unevenness between a base coat layer and a patterned layer to form a flat coating surface. CONSTITUTION: In a coating apparatus α, a base coater device A for forming a base coat layer on the whole surface of a base material β, a pattern forming device B for forming a patterned layer in an arbitrary part of the surface of the base coat layer (a), and a spreading roller device C for uniforming the unevenness of the base coat layer and the patterned layer by a spreading roll 12 are arranged successively in this order. In this way, since the patterned layer formed on the base coat layer is pressed by the spreading roll 12 to make the patterned layer penetrate into the base coat layer, the unevenness on the surface is eliminated, and also since coating films on the base coat layer and on the patterned layer stick to each other to improve adhesive strength, the patterned layer is not removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus for continuously forming a pattern on the surface of a substrate such as a long thin metal plate or a plastic film, and more particularly to a base coat layer and a pattern layer. The present invention relates to a coating device that eliminates the unevenness of and to form a flat coated surface.

[0002]

2. Description of the Related Art Conventionally, there are various techniques for forming a base coat on the entire surface of a substrate and forming a pattern layer on the base coat. For example, a pattern layer having an arbitrary shape is applied by a spray gun or a roll is used. Was formed.

[0003]

However, in the conventional technique, unevenness due to the thickness of the coating film is generated between the base coat layer and the pattern layer, and the compatibility of the coating film between the base coat layer and the pattern layer is poor. There is a drawback that the pattern layer is easily peeled off when the base material is wound into a coil or processed into a molded product using a molding machine, a press or the like. Also,
When coiled into a coil, there is a drawback that the winding diameter becomes large due to the unevenness and a space is required. Further, since the coating films of the base coat layer and the pattern layer are not well compatible with each other, when the base material is used as an exterior material for a building, the weather resistance and durability are extremely deteriorated.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, the pattern layer formed on the base coat layer is pressed by a spreading roll so that the pattern layer penetrates into the base coat layer to eliminate surface irregularities, and at the same time, the base coat layer is removed. These problems are solved by making the coating film of the pattern layer conform and improving the adhesive strength.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a coating apparatus according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing the outline of a coating apparatus according to the present invention, which comprises a coating apparatus α, a base material β, a base coater apparatus A, a pattern forming apparatus B, and a spreading roller apparatus C.

The base material β is a long and continuous thin metal plate,
It is made of a plastic film or the like, has an arbitrary width, has a thickness of about 0.2 to 1.5 mm, and is a body to be coated with a pattern on the surface by a coating device α.
As its application, it is molded into a panel shape by a molding machine, a press or the like and used as an interior material or an exterior material of a building. Further, it is continuously moved at a constant speed in the arrow direction by a separate conveyor, pinch roller or the like (not shown).

As shown in FIG. 2, for example, the base coater A has a main roll 1 wider than the width of the base material β and in contact with the surface of the base material β via a clearance Δa, and a width similar to that of the main roll 1. This is a roll coater type device which is formed from the auxiliary roll 2 which is in contact with the outer periphery thereof via a clearance Δb. Three
Is a paint supply device for continuously supplying a constant amount of base paint to the valley portion 4 formed by the main roll 1 and the sub roll 2.

Further, the main roll 1 and the sub roll 2 rotate in the directions of the arrows, respectively, and the coating material deposited on the outer periphery of the main roll 1 is directly deposited on the entire surface of the base material β, whereby the base coat layer is formed on the entire surface of the base material β. a is formed. Further, Δa≈Δb≈the thickness of the coating film of the base coat layer a, specifically, the thickness is about 5 to 100 μm.

As another example of the base coater device A, any device capable of forming the base coat layer a on the entire surface of the base material β may be used, for example, a curtain flow coater type device, a spray gun type device or the like. It is also possible.

For example, as shown in FIG. 3, the pattern forming apparatus B comprises a transfer main roll 5 in contact with the base material β, a transfer sub-roll 6 arranged in contact with the outer periphery of the transfer main roll 5, and a cleaning roll 7. Is a device for forming a pattern layer b having an arbitrary pattern on an arbitrary portion on the base coat layer a formed on the entire surface of the substrate β.

That is, a pattern layer trench 8 filled with various paints or inks for forming the pattern layer b is provided below the transfer sub-roll 6, and at least the outer periphery of the transfer sub-roll 6 is coated or ink. It comes into contact with.

The transfer sub-roll 6 is, for example, as shown in FIG.
As shown in (a) and (b), a hole 9 having a small diameter is formed on the outer circumference, and a group of the holes 9 is used to arbitrarily form a pattern shape. That is, as the transfer sub-roll 6 rotates, the paint or ink in the pattern layer trench 8 adheres to the surface, and the doctor 10 formed so as to come into contact with the outer periphery of the transfer sub-roll 6 removes a portion other than the inside of the hole 9. The pattern is transferred to the surface of the transfer main roll 5 by removing the paint or ink.

Further, the pattern transferred to the surface of the transfer main roll 5 is such that the pattern layer b is formed on the surface of the substrate β by the rotation of the transfer main roll 5. Even after the pattern layer b is formed on the surface of the base material β, since excess paint or ink adheres to the surface of the transfer main roll 5, the cleaning roll 7 is rotated to remove it. It is a thing. In the lower part of the cleaning roll 7, a solvent trench 11 filled with a solvent suitable for the properties of the paint or ink such as various solvents for cleaning, diluent and water is installed.

The material of the transfer sub-roll 6 is preferably a metal roll having excellent durability, and the transfer main roll 5 is a rubber roll that does not easily damage the surface of the base material β because paint or ink is easily deposited on the surface. Is preferred. In addition,
At least different colors may be used for the paint forming the base coat layer a and the paint forming the pattern layer b, and the properties of the paint may be the same.

As shown in FIG. 5 (a) and its enlarged view (b), the spreading roller device C has a spreading roll 12 in contact with the surface of the base material β, a cleaning roll 13 in contact with the spreading roll 12, and a doctor. 14, further cleaning roll 1
It is composed of a solvent trench 15 installed in the lower part of 3.

By rotating the spreading roll 12,
The unevenness of the base coat layer a and the pattern layer b formed on the surface of the base material β is flattened, and the pattern layer b is embedded in the base coat layer a to improve the familiarity between the two layers.

In each drawing, arrows indicate the traveling direction of the substrate β, the rotating direction of each roll, and the flowing direction of the paint or ink.

FIG. 6 is an explanatory view showing the arrangement of a series of devices when the coating device α is incorporated in a continuous line. The uncoiler D, the tension roll group E, the coating device α, the baking furnace F, the cooling device G, Tension roll group H, ricoiler I
It is composed of In the figure, arrows indicate the moving direction of the base material β and the rotating direction of each device.

The uncoiler D is for stocking the base material β in the form of a coil, and for transporting the base material β to the next step together with the pinch roller 16.

Next, the tension roll group E and the tension roll group H are formed so as to sandwich the coating device α, the baking oven F, and the cooling device G, and apply a pulling force (tension) to the base material β. It is a thing. As its configuration, a plurality of drive rollers 17 are arranged in a crank shape, and it is still effective to make the rotation speed of the tension roll group E slightly slower than the rotation speed of the tension roll group H.

Next, the baking oven F is for baking and drying ink and paint, and the inside is in a sealed space in a warm atmosphere utilizing the heat of combustion of gas, etc. It is divided into three parts, a baking part 19 and a slow cooling part 20, and shows a mountain-shaped temperature distribution. That is, the drying unit 18 is from room temperature to about 100 degrees Celsius, and the baking unit 19 is about 1 degree Celsius.
00 to 300 degrees, the slow cooling unit 20 is about 300 to 20 degrees Celsius
It shows a temperature distribution of about 0 degrees.

Further, there is no free roller or conveyor for supporting the substrate β between the baking furnace F and the cooling device G described later, and in the baking drying and cooling process,
It is an efficient and stable operation that eliminates obstacles to heat transfer. For this reason, the base material β flexes downward to some extent due to its own weight. Therefore, the sensor 21 is provided on the ground directly below the apex of the flexure, and the distance Δl between the ground surface and the apex of the base material β is monitored. The base material β is adjusted so as not to be installed on the ground.

The cooling device G is the base material β coming out of the baking furnace F.
Is cooled to room temperature and is composed of a sealed space. Inside the water injector 22 and blower device 23
Are installed in order on the front surface and the back surface of the base material β, and the base material β
In addition, water is jetted from the water jetting device 22 to cool it to room temperature, and compressed air is jetted from the blower device 23 to remove water droplets attached to the base material β. A pallet for repairing water is installed on the ground of the cooling device G, and this pallet is connected to a water tank / chiller device via a pipe and has a circulation structure to be led to the water injector 22 again. is there. The blower device 23 is connected to a compression device such as a compressor.

The ricoiler I is for stocking the coated base material β guided by the pinch roller 24 again into a coil shape. In the figure, 25 is a free roller,
As a supporting device for the base material β, a plurality of devices are arbitrarily installed in each place other than the baking furnace F and the cooling device G.

[0025]

[Other Embodiments] The embodiment described above is one embodiment of the coating apparatus according to the present invention, and a transfer sub-roll 6 as shown in FIG. 7 may be used. That is, the transfer sub-roll 6 in FIG. 7A has holes formed in a strip shape along the outer periphery thereof, and as shown in FIG. 7B, the strip-shaped and striped pattern layer b.
Are suitable for forming.

[0026]

As described above, according to the coating apparatus of the present invention, the pattern layer formed on the base coat layer is pressed by the spreading roll to penetrate the pattern layer into the base coat layer. Unevenness can be eliminated. Since the coating films of the base coat layer and the pattern layer are conformed to each other to improve the adhesive strength, the pattern layer does not peel off. There are characteristics and effects.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a typical example of a coating apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a representative example of a base coater device that constitutes a coating device according to the present invention.

FIG. 3 is an explanatory diagram showing a typical example of a pattern forming apparatus that constitutes a coating apparatus according to the present invention.

FIG. 4 is an explanatory diagram showing a representative example of a transfer main roll and a transfer sub-roll that form the pattern forming apparatus.

FIG. 5 is an explanatory diagram showing a typical example of a spreading roller device that constitutes a coating device according to the present invention.

FIG. 6 is an explanatory diagram showing an example of a coating line incorporating the coating apparatus according to the present invention.

FIG. 7 is an explanatory diagram showing another example of a transfer main roll and a transfer sub-roll that form the pattern forming apparatus.

[Explanation of symbols]

 A base coater device B pattern forming device C spreading roller device D uncoiler E tension roll group F baking furnace G cooling device H tension roll group I ricoiler a base coat layer b pattern layer α coating device β base material 1 main roll 2 sub roll 3 paint Supply device 4 Valley part 5 Transfer main roll 6 Transfer sub roll 7 Cleaning roll 8 Pattern layer trench 9 Hole 10 Doctor 11 Solvent trench 12 Spreading roll 13 Cleaning roll 14 Doctor 15 Solvent trench 16 Pinch roller 17 Drive roller 18 Drying part 19 Baking Part 20 Slow cooling part 21 Sensor 22 Water injector 23 Blower device 24 Pinch roller 25 Free roller

Claims (1)

[Claims] 1. A coating apparatus for forming a pattern on the surface of a continuous long thin plate-shaped substrate, a base coater apparatus for forming a base coat layer on the entire surface of the substrate, and a pattern layer on an arbitrary portion of the surface of the base coat layer. A pattern forming device for forming a pattern, and a spreading roll device for uniformizing the unevenness of the base coat layer and the pattern layer by rollers are successively arranged in this order.