JPS5858154B2 - How to paint convex parts on uneven surfaces - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved method for coating only the convex portions of a substrate having an uneven surface.

Traditionally, in order to improve the aesthetic appearance of the interior and exterior walls of buildings,
BACKGROUND ART The surfaces of wall panels and the like are often made uneven.

Industrially, such an uneven three-dimensional pattern is created by directly applying processing such as embossing to the decorative laminate base material itself, or by applying a coating material in an uneven shape to the surface of the decorative laminate base material, and usually the convex portions are is formed to have a constant thickness over the entire surface of the base material.

These decorative boards provided with an uneven surface were sometimes coated with a top coat, but this was to uniformly finish the entire surface in the same color.

However, recently, for design reasons, there has been a demand for decorative boards in which only the convex portions of the uneven surface are colored in various colors different from the concave portions.

Conventionally, such uneven surfaces could only be colored by hand, and it was considered unsuitable for production on an industrial scale.

The reason for this is that the base material itself often has warps or distortions, and it is rare for the convex parts to be on the same plane over the entire surface of the decorative board, and there are considerable undulations. It is impossible to color the entire surface of the area to a uniform thickness, resulting in uneven color tone and, depending on the location, there may be protrusions that do not come into contact with the roller, resulting in unpainted areas.

In addition, intentionally curved decorative laminates are sometimes used as base materials, but even in such cases, it is not possible to uniformly color only the convex parts of the uneven decorative laminate using conventional industrial painting methods. Can not.

In view of the above-mentioned current situation, the present invention provides an industrial method that can coat only the convex portions of a textured decorative board with a uniform thickness and a uniform color tone even when the convex portions are not on the same plane. The purpose is to provide

That is, 1 the present invention transports a base material having an uneven surface to be coated in a fixed direction, and at the same time presses an endless sheet, the surface of which has been coated, against the convex portions of the base material using a pressure means. This is a method for painting convex portions on an uneven surface, characterized in that the paint is moved in the same direction as the transport direction of the paint, thereby transferring the paint onto the convex portions of the surface to be coated.

Hereinafter, the present invention will be specifically explained with reference to the drawings.

The object to be coated to which the coating method of the present invention is applied may be, for example, the decorative laminate base material A itself whose surface is given unevenness by embossing or the like, as shown in the cross section in FIG.
Furthermore, as shown in the cross section in Figure 1, the surface of the decorative laminate base material A is partially coated with a thick film, and the convex portions are head cut to make the thickness uniform over the entire surface of the decorative laminate, thereby making the uneven surface. It may be formed.

In the method of the present invention, a decorative board having an uneven surface is subjected to color coating on the convex portions as shown in FIGS. 2 and 3, for example.

FIG. 2 and FIG. 3 are a perspective view showing an example of an apparatus for carrying out the method of the present invention and a schematic diagram illustrating its operation.

The decorative laminate base material A to be coated is transferred on the conveyor device 1 from left to right.

As the conveyor device, a belt conveyor as shown in FIG. 2, a roller conveyor as shown in FIG. 3, a chain conveyor, or any other suitable conveying means can be used.

The decorative laminate base material A is held and transported in a substantially horizontal manner with the uneven coating surface facing upward.

A pressure roller 2 serving as a pressure means is provided on the conveyor device 1 .

This roller 2 is made up of a large number of roller elements 3 as shown in FIG. 4 arranged in parallel as shown in FIG.

The roller element 3 is a disk as shown in FIG. 4, and a through hole 4 is bored in the center thereof.

For functional reasons, the roller element 3 has a relatively narrow thickness W, for example, a diameter of 50 to 300 mm.
The width of Trm is about 10 to 50 m.

The material of the roller element 3 may be iron or iron plated with chromium, nickel, etc., or may be made of a metal core and the surrounding area is made of plastic (for example, MC nylon, Delrin, or hard vinyl chloride resin), or any other suitable material. Weight (for example, 50 to 1 oo per width W10m).

g) Any material may be used as long as it has strength, and it is more preferable to use a material with low frictional resistance.

Furthermore, as shown in FIG.
A convex portion may be provided, which allows the element 3
It is possible to reduce the contact area and reduce frictional resistance when these are arranged in parallel.

Roller elements 3 as described above are arranged with almost no gap (for example, a gap of 0.005 m) as shown in Figure 5.
A large number of roller elements are arranged in parallel, and the frame body 5 is passed through the through holes 4 of all the roller elements.

The inner diameter of the through hole 4 is, for example, 5 to 100 m, and the diameter of the frame 5 is, for example, 3 to 50 m.

The roller element 3 is loosely fitted into the frame 5.

6 is a member for fixing the frame body 5 to the frame;
is a presser plate for maintaining an appropriate gap between the roller elements 3.

The frame body 5 is fixed in a direction perpendicular to the transport direction of the conveyor device 1 and in a horizontal direction.

In addition, if the free rotating rollers 8 are brought into contact with the front and back of the parallel roller element 3 in the transfer direction of the conveyor device 1 and the back and forth movement is restricted, the roller element 3
It is advantageous to be able to only move and rotate in the vertical direction.

In this device, a sheet 9 is provided which runs endlessly under the parallel roller elements 3 in the same direction as the transport direction of the conveyor device 1.

This includes the drive roller 10 as shown in FIGS. 2 and 3.
Alternatively, the free roller 11 and the roller element 3 may be wound endlessly.

The endless sheet 9 may be any material as long as it has solvent resistance, flexibility, and a high surface hardness, for example, 0.3~
Examples include polyurethane, polyethylene, vinyl chloride, and other resin sheets having a thickness of 5 m.

It is best to tension the sheet 9 with some allowance.

Furthermore, it is preferable that the endless sheet 9 has no seams.

In this device, in order to apply paint to the surface of the endless sheet 9, a paint container 12, a doctor roller 1
3. Means consisting of a transfer roller 14 and a scraping blade 15 are provided.

Further, this device is provided with means consisting of a roll brush 16 and a collected paint container 17 in order to collect unpainted paint on the surface of the endless sheet 9.

Power for this device is provided by a motor 18.

The rotation of the motor 18 is transmitted to the conveyor device 1, and the conveyor device 1 transports the decorative laminate substrate A to be coated in the direction indicated by the arrow in FIG.

At the same time, the rotation of the motor 18 is transmitted to the endless sheet driving roller 10, the doctor roller 13, the transfer roller 14, and the roll brush 1 through the relay shaft 19 and others.
6, thereby causing both to rotate or move in the direction indicated by the arrow.

Here, preferably the transport speed of the conveyor device 1 and the traveling speed of the endless sheet 9 are made equal.

The method of the present invention is carried out as shown in FIG. 3 using the above-mentioned apparatus.

That is, an uneven three-dimensional pattern is provided on the upper surface of the decorative laminate base material A to be coated, which is transported horizontally from left to right on the conveyor device 1 at a constant speed.

On the other hand, the endless sheet 9 whose entire surface has been coated with the paint B by the paint application means runs under the pressure roller 2 in the same direction as the decorative laminate base material A, and at this time, the endless sheet 9 runs under the pressure roller 2 in the same direction as the decorative laminate base material A. The weight causes the paint to be transferred to the convex portions of the base material A.

The state of the roller element 3 at that time is shown in FIGS. 5 and 6.

As is clear from these figures, even if the decorative laminate base material A to be coated has warps, undulations, or is even curved and the convex portions are not on the same plane over the entire surface of the base material, the actual In the method of the invention, by applying uniform pressure to the entire surface of the convex portion in accordance with its shape, the paint can be applied uniformly to the entire surface of the convex portion, so that unevenness in color tone does not occur.

FIGS. 7 and 8 show another example of the pressurizing means used to implement the present invention.

(1) [See Figures 7 and 8] An elastic roll 2 having a cylindrical shape and containing a fluid substance 20 such as a liquid or sand and/or a pressurized gas 21 inside.
2 arranged around the conveyor device.

(2) [See Figures 9 and 10] An air blowing device having a compressed air outlet 30 arranged around the conveyor device (31 is an air recovery opening)
.

The endless sheet pressing means used in the present invention does not press the sheet so as to completely follow the microscopic irregularities of the surface to be coated, but does not press the sheet so that the convex portions are uniform over the entire surface to be coated. Any device that can be pressed while sufficiently following macroscopic displacement from a plane (ie, warpage, distortion, curvature, etc.) is applicable.

In the above, the case where the uneven coating surface of the substrate to be coated to which the method of the present invention is applied has sufficient hardness, that is, the case where the surface of the base material is molded or the surface of a cured coating film, etc., has been explained. The spraying can also be applied when the uneven surface to be coated is formed by applying the spraying material in scattered spots on a base material surface on which aggregate is spread and fixed, and the spraying is in an uncured state.

Here, the aggregates used are silica sand, cold water sand, glass peas,
Examples include quartz powder, plastic powder, etc. In order to fix the aggregate on the base material surface, the aggregate is mixed with water-based paint, high solid paint, non-solvent paint, organic solvent diluted paint, etc., and then applied and dried. Alternatively, immediately after applying the paint, the aggregate is sprinkled on the paint and the paint is dried.

Known materials may be used as the coating material for forming the convex portions, such as J.
An example is the spray material specified in IS-A6910.

Of course, the spray material is applied in a dotted manner to a thickness greater than the particle size of the aggregate.

In this case, the convex surface is painted as shown in FIG.

That is, an uncured base material A with aggregate X spread and fixed on its upper surface and sprayed material Y applied dotted thereon is transferred from left to right on a conveyor device 1, and then pressed into an endless sheet by means of a pressurizing means. 9, the spray material Y is expanded to the size of the aggregate X particle size.

At the same time, the paint B is applied to the convex portions of the spray material Y to a uniform thickness, and the paint B is dried to become a product.

In addition, in this method, the undercoat paint applied to the base material A,
A variety of finishes can be achieved by combining various colors, such as changing the colors of the spraying material Y and paint B, or using the same color for the undercoat and paint B and using a different color for the spraying material Y.

In this method, it is possible to simultaneously carry out head cutting of the spray material and painting of the convex portions, which makes it possible to shorten the process and is extremely preferable in practice.

In the above example, the surface to be coated consists of one flat surface, but if it consists of a combination of multiple surfaces, such as a cross-sectional shape, multiple surfaces will be applied corresponding to each surface to be coated. A pressurizing means may be provided around the transfer path, and the coating may be applied simultaneously or sequentially.

[Brief explanation of the drawing]

Figures 1a and 1b are cross-sectional views of specific examples of the substrate to be coated according to the present invention, and Figures 2 to 4, Figures 5a and b, and Figures 6 to 11 are embodiments of the method of the present invention. FIG. A: Base material of the object to be coated, B: Paint, X.
... Aggregate, Y ... Spraying material, 1 ...
・Conveyor device, 2... Pressure roller 3
...Roller element, 4 ... Through hole, 5 ... Frame, 9 ... Endless sheet, 12 ... Paint capacity, 20... Fluid substance, 21... Pressurized gas, 22...
・Elastic roll, 23... Rotating shaft, 30...
...Compressed air outlet.

Claims (1)

[Scope of Claims] 1. A base material having an uneven surface to be coated is conveyed in a fixed direction, and at the same time, an endless sheet with a paint applied to the surface is pressed against the convex portions of the base material by a pressure means, while the conveyor The paint is moved in the same direction as the transport direction of the device, thereby transferring the paint to the convex portions of the surface to be coated.
How to paint convex parts on uneven surfaces. 2 The uneven coating surface is the molding surface of the base material. Method of Section 1. 3. The method of item 1, wherein the uneven coating surface is a cured coating surface on a substrate. 4. The method according to item 1, wherein the uneven surface to be coated is formed by applying a spraying material in scattered dots to a base material surface on which aggregate has been spread and fixed, and the spraying material is in an uncured state. 5. The pressurizing means has a plurality of roller elements each having a through hole in the center of the disc, each having a rod that is thinner than the through hole,
5. The method according to any one of items 1 to 4, wherein the pressure rollers are arranged in parallel through the through holes. 6. Items 1 to 4, wherein the pressurizing means is an elastic pressurizing roller in which a fluid substance such as a liquid or sand and/or a pressurized gas is sealed inside a cylindrical tube or an annular tube. Either way. 7. The method according to any one of Items 1 to 4, wherein the pressurizing means is an air blowing device.