JPH03213177A - Painting of super-structural plate having concavely-shaped groove - Google Patents

Abstract

PURPOSE:To permit paint to be applied to the surface of a plate-like body and the side faces of a concavely-shaped groove provided thereon in a direction vertical to at least the carrying direction of the plate-like body with a bottom part of the concavely-shaped groove left unpainted by providing two coating sponge rolls and a device for reversing the carrying direction of the plate-like body therebetween. CONSTITUTION:A coat of paint is applied to a plate-like body 1 having on its surface a concavely-shaped groove 3 perpendicularly intersecting at least the carrying direction thereof by a first painting sponge roll 4 which rolls in the same direction as the carrying direction of the plate-like body and at a speed equal to or higher than the carrying speed thereof in such a manner that the surface 2 of the plate-like body and one side wall 3b of the concavely-shaped groove 3 on the upstream side of the carrying direction are painted with a bottom part 3a thereof left unpainted. The plate-like body 1 is then carried in the reverse direction and another coat of paint is applied thereto by a second painting sponge roll 8 which rolls in the same direction as the carrying direction of the plate-like body 1 and at a speed equal to or higher than the carrying speed thereof in such manner that the surface 2 of the plate-like body and the other side wall 3c of the concavely-shaped groove 3 on the upstream side of the carrying direction are painted with the bottom part 3a thereof left unpainted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention has a concave groove. Concerning a method of painting architectural boards.

[Prior art and its issues]

Conventionally, in architectural boards having concave grooves at least in the width direction of the plate surface, such as a lattice-like concave-convex pattern or a brickwork-like concave-convex pattern, a method of painting the convex portions and the concave grooves in different colors has been used. The method used was to manually apply paint to the recesses using a brush or other jig. However, it was an extremely complicated process and was not suitable as an industrial painting method.A similar method for painting concave grooves involves spraying powder on at least one part of the surface plate, including the four parts. After removing the powder from the areas excluding the recesses and heating the recesses of the surface plate to melt the powder loaded in the recesses, finish by forming a coating layer on the four parts along the shape of the recesses. A method (see Japanese Patent Publication No. 62-2971) is known.

However, this method requires a powder dispersion device, a powder removal device, a heating device, etc., resulting in a very large device, which is still unsatisfactory.

[Means for Solving the Problems and Their Effects] In view of the current situation, the present inventor has made efforts to provide a coating method with high precision for coating one convex portion and one concave groove using a simple device. As a result of repeated research, the present invention was completed.

That is, in the present invention, a plate-like body 1 having a concave groove 3 on its surface at least perpendicular to the conveyance direction is coated by a first application sponge roll 4 that rotates in the same direction as the conveyance direction and at the same speed as the conveyance speed. After painting the convex surface 2 and one side 3b of the concave groove 3 on the upstream side in the conveyance direction without painting the concave groove bottom part 3a, the plate-like body l is set in the reverse conveyance direction, and further, A second coating sponge roll 8 that rotates in the same direction as the conveyance direction of the shaped body 1 and at the same speed or speed as the conveyance speed.
The present invention relates to a method of painting a construction board with an uneven pattern, in which the other side surface of the concave groove 3 on the transport direction side is coated without coating the bottom surface 3a of the concave groove 3.

[Explanation of Examples]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

Figure 1 shows a plate-shaped body with a convex pattern shaped like a stack of bricks. As the sponge roll deforms as shown in the figure,
Convex surface 2 of plate-shaped body 1 and concave groove 3 on the upstream side in the conveyance direction
The shaded area on one side 3b is painted, and the concave groove side 3C and the concave groove bottom 3a on the opposite side in the conveyance direction are not painted. At this time, the rotation speed of the sponge roll is gradually slowed down, and the conveyance speed of the plate-shaped body 1 is As the temperature approaches , the degree of deformation of the sponge roll becomes smaller. Therefore, it becomes difficult to coat the portion of the concave groove side surface 3b close to the concave groove bottom surface 3a, so the distance between the first application sponge roll 4 and the plate-like body 1 is
Adjustment is made by narrowing the lower end of the coating sponge roll 4 to the extent that it does not come into contact with the concave groove bottom 3a.

Further, a concave groove 7 parallel to the conveying direction is provided on the surface of the plate-shaped body.
5, the application sponge roll 4 enters the concave groove 7 evenly on the sides of the concave groove 7 in the longitudinal direction, so that the concave groove side surfaces 7b on both the left and right sides of the concave groove are formed. 7c, will be painted.

In the method of the present invention, as described above, only one side surface 3b of the concave groove 3 perpendicular to the conveyance direction is painted, and the plate-like body l is shown in FIGS. 6 and 7, with the other side surface 3c and bottom surface 3a left unpainted. The sponge is fed to the second coating sponge roll 8 as shown in FIG.

As shown in FIG. 6, first the upstream side surface 3b of the concave groove 3 perpendicular to the conveyance direction and both side surfaces 7b and 7c of the parallel concave groove 7 are coated with the first application sponge roll. At this time, the bottom surfaces 3a and 7a of the concave grooves 3 and 7 are not painted.

The plate-shaped body 1 coated with the first application sponge roll 4 is rotated in a plane, and the leading edge Y and the trailing edge X are reversed up and down.

Then, the second coating sponge roll 8 coats the other side surface 3c of the concave groove 3 which is perpendicular to the conveyance direction and which was not coated by the first coating sponge roll 4.

The coating method shown in FIG. 7 may be used instead of the coating method shown in FIG. 6.

In the case of FIG. 7, the plate-shaped object 1 coated with the first coating sponge roll 4 is slid laterally, and then the conveyance direction is reversed and it enters the second coating sponge roll 8. In the case of FIG. 7 as well, the leading edge Y and the trailing edge X are reversed in the upstream and downstream directions by reversing the conveyance direction in this manner.

In this way, both side surfaces 3b and 3c of the concave groove 3 perpendicular to the conveyance direction on the surface of the plate-shaped body 1 are painted except for the bottom surface 3a. Of course, the same applies to the concave grooves 7 parallel to the conveying direction.

Furthermore, before the coating of the present invention, an undercoat is applied to the entire surface of the plate-like body, and by applying the coating of the present invention using a paint of a different color from the undercoat, the convex portions of the plate-like body l can be coated. The side surfaces of the concave grooves and the side surfaces of the concave grooves have different colors, and in addition to the three-dimensional effect of the uneven pattern, the relief of the color is emphasized, further enhancing the three-dimensional effect.

〔Effect of the invention〕

■The bottom surface of the concave groove of the plate-like body, which has a concave groove at least in the direction perpendicular to the conveyance direction, using very simple equipment equipped with two application sponge reels and a device for reversing the conveyance direction of the plate-like body between them. It is possible to paint the surface of the convex part and the side surface of the concave groove except for the part, and it is also possible to paint the concave groove to a part very close to the bottom of the concave part.

■First. The coating range of the concave grooves 3.7 can be adjusted by rotating the second application sponge rolls 4, 8 at a speed faster than the conveyance speed of the plate-like body 1, and adjusting the rotation speed.

However, in this case, 1. second application sponge roll 4,
It is desirable that the rotational speeds of 8 are the same.

[Brief explanation of drawings]

Fig. 1: A plan view of a construction board using the method of the present invention, Fig. 2: A sectional view taken along the line A-A in Fig. 1, Fig. 3: A side view of an apparatus for carrying out the method of the present invention, Fig. 4:
An explanatory diagram of the action of the sponge roll used in the present invention, Fig. 5: An explanatory diagram of applying concave grooves parallel to the conveyance direction, Fig. 6: An explanatory diagram of the action of the first embodiment of the method of the present invention, Fig. 7:
Similarly, an explanatory diagram of the operation of the second embodiment, 1: 2: 3: a b C 4: 5: 6 Near: plate-shaped body, convex surface, concave groove perpendicular to the conveyance direction, : bottom part, : concave groove side surface , : Concave groove side surface, first coating sponge roll, doctor roll, conveyance roll, concave groove parallel to the conveyance direction, : bottom surface. : Side, : Side, : Second application sponge roll. Figure Figure

Claims (1)

[Claims] 1) Concave grooves 3 on the surface at least perpendicular to the conveyance direction.
The convex surface of the plate-shaped body 1 is coated without coating the bottom part 3a of the concave groove 3 of the plate-shaped body by the first application sponge roll 4 rotating in the same direction as the conveyance direction and at the same speed or at the same speed as the conveyance speed. 2 and a concave groove 3 on the upstream side in the conveyance direction
After coating one side surface 3b, a concave shape is formed by a second coating sponge roll 8 rotating in the opposite direction of conveyance of the plate-like body and at the same or faster conveyance speed as the conveyance direction of the plate-like body. A method for coating a construction board with an uneven pattern, characterized in that the convex surface 2 and the other side surface 3c of the concave groove 3 on the upstream side in the conveyance direction are coated without coating the bottom surface 3a of the groove 3. 2) The coating method according to claim 1, characterized in that the rotational speed of the first coating sponge roll 4 and the second coating sponge roll 8 is rotated faster than the conveyance speed of the plate-shaped body.