JPS624184B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for painting the end faces of laminated boards,
More specifically, the present invention relates to a method for painting the laminated end surface of a board that faces downward when the board is coated using a flow coater.

[Conventional technology]

Generally, the surface of inorganic construction board materials is coated, and this coating is required to be suitable for mass production.
Painted by flow coater method.

[Problems with conventional technology]

By the way, the above-mentioned inorganic construction board materials often have joint joints formed on both end faces, and when painted by the above-mentioned flow coater method, there is a problem that the joint parts cannot be coated well. It was hot.

In other words, the shape of the gouging is that when the board is placed flat, the step side of the gouging on one side faces upward, so
It can also be coated with a flow coater, but since the step surface of the gouge on the other end faces downward, it cannot be coated at all.

Therefore, as shown in Fig. 1, the paint B is sprayed from the supply pipe C to the face A facing downward, but when the surplus paint flows down after spraying, This paint hardened near the opening of the supply pipe C or near the discharge port of the paint receiving trough D, resulting in poor paint circulation.

In particular, moisture-curing paints are preferably used for calcium silicate plates, etc., but these moisture-curing paints are hardened by the moisture contained in the air during the painting process, regardless of the evaporation of the solvent. For example, if a thin tube with a diameter of 3 mm to 20 mm is used as a paint supply tube for edge painting, the paint will harden even inside the supply tube within about 4 hours after the start of painting. There was a problem in which the paint solidified in the equipment and equipment of the painting equipment, making it impossible to perform efficient painting.

[Problems solved by invention]

The present invention has been made in view of the above-mentioned problems, with the object of providing a method for painting the edge of a laminated plate material, which can apply a stable coating over a long period of time without curing the coating.

[Technology for solving the problem] That is, the method of painting the end face of a laminated board of the present invention is as follows:
The open end of the paint supply pipe is faced to the downward facing step surface of the board with gouging formed on both ends in the width direction, and paint is applied from the paint supply pipe while the board is being transported in the length direction. The paint is discharged to adhere to the surface of the downward step, and immediately after that, a piece of paint is brought into contact with the surface of the downward step, and the adhered paint is uniformly applied to the surface of the step of the step, forming a coating film. It is characterized by:

〔Example〕

The invention will now be described with reference to state diagrams for implementation.

FIG. 2 is a plan view of a coating device used for carrying out the present invention, and FIG. 3 is a sectional view showing the state of implementation.

The coating method of this invention is based on the width direction both end surfaces 1A, 1
As shown in FIG. 3, the paint supply pipe 3 is placed with the open end 3A facing the side of the plate material 1 where the plated surface of the plate material 1 with the plated plates 2 and 2' faces downward as shown in FIG. Place the
While transporting the plate material 1 in the length direction (arrow P, in the case of Fig. 3, the direction of the back of the paper), the paint 4 is discharged to adhere, and then the painted piece 5 is brought into contact with the laminated surface 2. Immediately after the coating material 4 is applied, the coating material 4 is spread on the surface of the auger with the coating piece 5, so to speak, to form a coating film.

As the coating piece 5, a roll, a felt piece, a brush, etc., whose width is such that it can come into contact with the entire width of the amalgamated surface, is used, and the paint supply pipe 3
It is used to evenly apply the paint discharged from the gouging surface to the surface of the gouging without letting it fall downward.

In FIG. 3, reference numeral 6 denotes a screen for applying paint by a flow coater, and the flow coater applies the coating to the gouged surface 2' whose stepped surface faces upward.

Furthermore, the apparatus shown in FIG. 2 includes a gutter 10 arranged along the lower side of the laminating surface 2 of the plate material 1 transferred in the length direction, and a paint supply pipe 3 and a paint piece support arm 11 on the side of this gutter 10. It is something that stands out.

[Effect]

In this invention, after the paint 4 has been blown out and adhered to the downwardly facing step surface, the painted piece 5 comes into contact with the adhered paint 4 as the plate material 1 moves relative to the surface, and at this time, the paint spreads in the width direction. Spreads out to form a uniform coating.

〔effect〕

Since this invention is constructed as described above, by adjusting the amount of paint discharged from the paint supply pipe, most of the paint is applied to the amalgamated surface by paint chips. Surplus paint does not flow down, and therefore, the amount of paint circulated when painting by the flow coater method is extremely small, and the absolute amount of paint that comes into contact with the atmosphere can be significantly reduced. Solidification in the supply route or circulation route is less likely to occur, making it possible to stably supply the paint.

In addition, since the coating film formed on the amalgamated surface is made uniform by the coating pieces, it also has the effect of providing a beautiful finish.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is a plan view of an apparatus used to implement the present invention, and FIG. 3 is a sectional view showing the state of implementation. 1... Plate material, 1A, 1A'... Width direction end surface, 2... Gouging, 3... Paint supply pipe, 3A... Open end, 4... Paint,
5...Painted piece.

Claims (1)

[Scope of Claims] 1. While transporting the plate material in the length direction, the open end of the paint supply pipe is faced to the downward facing step surface of the board material with gouging formed on both end faces in the width direction. Paint is discharged from the paint supply pipe to adhere the paint to the surface of the downward lathe step, and immediately after that, a piece of paint is brought into contact with the surface of the downward lathe step, so that the adhering paint is evenly distributed over the surface of the step. A method for coating the end face of gouging, which is characterized by applying the coating to the end surface of the gouged wood to form a coating film. 2. The method for painting the end face of a laminated plate according to claim 1, wherein the paint is a moisture-curable paint.