JPH05267A - Coating method for board with embossed pattern - Google Patents

Abstract

PURPOSE:To produce a decorative coating film having a uniform thickness corresponding to a deep-cut embossed pattern on a board. CONSTITUTION:A board 1 having an embossed pattern formed on its surface 1a is transferred into a coating booth 3 by a belt conveyer with the surface 1a being oriented downward. In the coating booth 3, a coating 5 is sprayed on the surface 1a of the board with a shower 6. After the excessive part of the coating being removed from the board surface 1a using an air nozzle 7, the board 1 is floated and transferred by the force of hot air blown from an air table with the surface 1a being oriented downward until the flowability of a coating film formed on the surface 1a is eliminated. The board 1 is turned over by an adsorptive reversing device 9 after the transportation of the board, and the board 1 is introduced into a drying oven for a baking treatment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating plate materials such as building materials.

[0002]

2. Description of the Related Art When a plate material such as a wall material or a roof material is manufactured from an inorganic kneaded material, it has been conventionally practiced to continuously manufacture the plate material by extruding the inorganic kneaded material. The background color of the inorganic building material is gray or dark gray, and the appearance is inferior as it is. Cosmetic coating is performed using a coater or roll coater.

[0003]

[Problems of the prior art] However, when the concavo-convex pattern of the building material is formed from a deep engraving pattern for improving the design, there is an unpainted part in the coating by the above flow coater or roll coater, and conversely As shown in FIG. 3, the coating material C is not formed on the surface unevenness pattern B of the plate material A due to the accumulation of the paint in the concave portion, and the deep engraved unevenness pattern B at the corner becomes shallow and the design is impaired. there were.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, the present invention has been made with the object of providing a method for coating a plate material capable of coating the surface unevenness pattern of the plate material with a uniform thickness. Is.

[0005]

That is, in the method for coating a plate material of the present invention, a plate material having an uneven pattern on the surface is conveyed with the surface facing downward, and the coating material is sprayed on the surface in the downward state. At the same time, after the surplus of the applied paint is blown with air to remove it from the surface of the plate material, the plate material is applied by the force of warm air blown from the air table in the downward state until the fluidity of the coating film formed on the surface disappears. Is floated and conveyed, and after the conveyance, the plate material is turned upside down and baked in a drying furnace.

[0006]

Embodiments of the present invention will be described below. FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a sectional view of a plate material obtained in the embodiment of the present invention. That is, the plate material coating method of the present invention is manufactured by extrusion molding an inorganic kneaded product, and at the same time, the plate material 1 having an uneven pattern formed on the surface 1a at the time of the extrusion molding is placed on the roller conveyor with the surface 1a facing downward. 2 and conveys it to the coating booth 3, and in the coating booth 3, the paint 5 supplied by the pump 4 is sprayed onto the plate surface 1a by the shower means 6, and the surplus of the applied paint is air nozzle 7 After air is blown from the plate material 1a to remove it from the plate surface 1a, the plate material 1 is floated and conveyed by the force of the warm air blown from the air table 8 in the downward state until the fluidity of the coating film formed on the surface 1a disappears. And, after the transportation, the back surface of the plate material is sucked by the suction reversing means 9 to be turned upside down,
It is placed on a roller conveyor 10 and sent to a drying furnace for baking. The temperature of the hot air is suitably 30 to 60 ° C. When the paint is solvent-based, it is heated for 3 to 5 minutes, and when it is aqueous, it is heated for 3 to 10 minutes. Although not shown, the air table 8 is provided with a guide member on its side surface to guide the conveyance of the plate material 1.

[0007]

According to the above-described coating method, the plate material surface 1a, which is the coated surface, is coated downward and the excess paint is scraped off by the air nozzle 7. Therefore, even if the unevenness pattern of the plate material 1 is a deep engraved pattern. The accumulation of paint in the recess 12 disappears,
A uniform coating film 11 is formed.

[0008]

As described above, according to the coating method of the present invention, since it is possible to coat the uneven pattern of the plate material with a uniform thickness, the design of the decorative surface of the plate material due to the deep engraving pattern may be impaired. Disappear.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a sectional view of a plate material obtained in an example of the present invention.

FIG. 3 is a cross-sectional view of a plate material obtained by a conventional coating method.

[Explanation of symbols]

 1 Plate Material 5 Paint 6 Shower Means 7 Air Nozzle 8 Air Table

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B05D 7/00 C 8616-4D

Claims (1)

Claim: What is claimed is: 1. A plate material having a concavo-convex pattern formed on the surface thereof is conveyed with the surface facing downward, and the coating material is sprayed onto the surface in the downward state, and the excess amount of the applied coating material is applied. Air to remove it from the surface of the plate, and then the surface of the plate is floated and conveyed by the force of the warm air blown from the air table in the downward state until the fluidity of the coating film formed on the surface disappears, and the conveyance After that, the plate material is turned upside down and baked in a drying oven, which is a method for coating a plate material with an uneven pattern.