JPH04190875A - Coating method for flat sheet roofing material - Google Patents

Abstract

PURPOSE:To contrive a way to apply a uniform coat by a method wherein a flow coater is located in a high position and a coating material of a low viscosity is dropped therefrom, when the coating film is applied vertically from above to the ribs and roots of a flat sheet roofing material moving at a constant speed in the direction at right angles to the surface of the ribbed sheet roofing. CONSTITUTION:A coating film 3 is dropped vertically from above onto the ribbed surface 4 of a flat sheet roofing material 1 moving at a constant speed in the direction at right angles to the ribbed surface 4 of the flat sheet roofing material 1. In the aforesaid coating method, a flow coater 2 is located in a higher position, preferably to a height of about 150-380mm from the surface of the flat sheet roofing material 1, i.e., about 1.5-3 times the conventional height and the coating film 3 to be applied is kept at a lower viscosity than in the conventional method, preferably from about 8 to 9 seconds/IHS. As a result, a uniform coat can be applied to the surface of the sheet roofing material having the ribs and roots on its surface.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for coating flat roofing materials. More specifically, the present invention relates to an improved coating method that can uniformly apply paint to a flat roofing material having an uneven surface, and also allows partial painting.

(Prior Art) Conventionally, flat plate roofing materials made of tiles, cement-based inorganic plates, etc. have been used for construction of roofs of houses and the like.

When roofing is done using such flat roofing materials, for example, as shown in the perspective view in Figure 3, part of the flat roofing materials (A) are overlapped from the eaves side and placed on the slope of the roof. It is placed and fixed.

Generally, the surface of these flat roofing materials (A) is coated with resin or the like for the purpose of protecting the base material and modifying its appearance.In the case of roofing construction as shown in Figure 3, In this case, the surface of this flat roofing material (A) is the exposed part (B).
and non-exposed areas. For this reason, as illustrated in FIG. 3, flat plate roofing materials (A) in which only exposed areas (A) are coated are becoming popular in consideration of reducing the amount of paint used and handling thereof.

FIG. 4 is a perspective view illustrating a method of applying paint only to the exposed portion (b) of the flat roofing material (a).

For example, in the coating method shown in FIG. 4, the substrate of the flat roofing material (A) is moved in the direction of the arrow in the figure, and the paint (E) is dripped from a flow coater (E) placed above it. The dripping of paint (e) onto the non-exposed areas (i) of the flat roofing material (a) is blocked, and paint (e) is applied only to the exposed areas (i).

(Problems to be Solved by the Invention) However, although the conventional painting method as illustrated in FIG. Issues remained.

This problem can be solved, for example, on an uneven surface (
When trying to paint a flat roofing material (ri) having a coating (g), move the flat roofing material (ri) in the orthogonal direction and drip the paint (e) from the flow coater (1) above it, as shown in Figure 6. As shown in Figure 2, the film thickness of the paint (E) is different between the front and rear of the convex part (E) in the direction of travel indicated by the arrow in the figure, and the paint (E) is unevenly applied only to the front. The problem is that the paint (e) is not sufficiently applied to the rear.

For this reason, when painting flat roofing materials with uneven surfaces, it is difficult to make the coating uniform, and variations in performance are unavoidable.

This invention was made in view of the above-mentioned circumstances, and it solves the drawbacks of the conventional coating method for flat plate roofing materials having an uneven surface, and provides a coating method for flat roofing materials having an uneven surface. The object of the present invention is to provide an improved coating method that can uniformly apply paint to a surface and also allows partial coating.

(Means for Solving the Problems) The present invention solves the above-mentioned problems by providing an upward direction for a flat roofing material having an uneven surface and moving at a constant speed in a direction perpendicular to the uneven surface. To provide a coating method for a flat plate roofing material, which is characterized by disposing a flow coater at a higher position and dropping a low-viscosity coating in a coating method in which a coating film is dropped parallel to a more uneven surface.

(Function) In the method for painting flat roofing materials of the present invention, when a paint film is dripped from a flow coater parallel to the uneven surface of the flat roofing material having an uneven surface, the flow coater is installed. By setting the position higher than before and making the dripping paint lower in viscosity, the film thickness of the paint on the uneven surface is always made uniform, and the finished appearance of the flat plate roofing material is improved.

Furthermore, since the paint film can be dripped orthogonally to the uneven surface of flat roofing materials that move in a certain direction at a constant speed, it is possible to partially paint the surface and rationalize the use of materials.

(Example) Hereinafter, the present invention will be described in more detail by showing examples along with the attached drawings.

FIG. 1 is a perspective view of essential parts showing an embodiment of the method for coating flat roofing materials of the present invention.

For example, as shown in FIG. 1, in the method of the present invention, the flat roofing material (1) is moved at a constant speed in the direction of the arrow in the figure, and the paint film (3) is transferred from the flow coater (2) installed above. ) is dripped parallel to the uneven surface (4) of the flat roofing material (1). In this case, the installation position of the flow coater (2) is higher than that of the conventional method, preferably on the flat plate roofing material (1).
1.5 to 3 times higher than the conventional method, which is about 150 to 3801 nff+, and the paint dropped as a paint film (3) has a lower viscosity than the conventional method, more preferably 8 to 9 seconds/1. ．． Approximately H and S. Furthermore, it is preferable to increase the amount of paint applied by slowing down the transition speed of the flat roofing material (1) from the normal speed, for example, by increasing the amount of paint applied.
The speed is 0 m/min, and the coating amount is approximately 85±5 g/r+.

In this way, compared to conventional painting methods, by changing the installation position of the flow coater, the viscosity of the paint, or the transfer speed and application amount of the flat roofing material, it is possible to apply a uniform coating to the uneven surface (4). becomes possible.

FIG. 2 is a perspective view showing an example of coating a flat roofing material by the coating method of the present invention. In this example, the substrate of the flat roofing material (1), which is divided into two pieces, is painted by moving at a constant speed in the direction of the arrow in the figure. Also, flat plate roofing material (1)
A gutter (6) is disposed above the non-exposed part (5) to partially block the paint film (3) and collect the paint in this part. Paint is applied only to exposed areas (7).

As described above, in the coating method of the present invention, the flat roofing material (1) having an uneven pattern on its surface is moved in a direction perpendicular to the uneven surface (4), and the paint film (3) is applied to the uneven surface (4). ), it is possible to efficiently apply partial coating as shown in FIG.

Of course, the present invention is not limited to the above examples, and it goes without saying that various embodiments are possible with respect to details such as the shape and size of the flat roofing material, and the means of partial coating.

(Effects of the Invention) As explained in detail above, according to the present invention, even flat roofing materials having an uneven pattern on the surface can be uniformly coated with a good finished appearance.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts showing an embodiment of the method for coating flat roofing materials of the present invention. FIG. 2 is a perspective view showing an example of a coating process for a flat roofing material using the coating method of the present invention. FIG. 3 is a perspective view showing an example of general roof construction using flat roofing materials. FIG. 4 is a perspective view showing an example of a conventional partial coating method for flat roofing materials. FIG. 5 is a perspective view showing an example of a flat roofing material having an uneven pattern on its surface, and FIG. 6 is a sectional view of a main part illustrating a conventional coating method for the flat roofing material. ■...Flat roofing material 2...Flow coater 3...Paint film 4...Uneven surface 5...Non-exposed section 6...Gutter 7...Exposed section agent Patent attorney Toshi Nishizawa Youngest brother 1 Figure 2 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1) A coating method in which a paint film is dripped parallel to the uneven surface from above onto a flat roofing material that has an uneven surface and moves at a constant speed in a direction perpendicular to the uneven surface. A method for painting flat roofing materials, which is characterized by placing the paint at a high position and dripping a low-viscosity paint.