JPS58207970A - Surface treatment of extruded aluminum material - Google Patents

Abstract

PURPOSE:To enable to finish the blasted surface of an extruded aluminum material into a state having a satin-finish surface and a profound feeling composed of a composite color, by applying the primary and secondary coatings having different colors, and wiping off a part of the second coating. CONSTITUTION:An extruded aluminum material is mounted on a movable table, and hard small particles of 0.3-2mm. in size such as sand or metal pieces are blown against the surface of said extruded material being moved at a speed of 2-5m/min. Onto the surface where minute ruggedness is formed in this way, solvent baking finish such as acryl or polyester is applied and sufficiently dried. Thereafter, the secondary coating is performed to the surface using solvent-reduced wiping paint having a different color or the like. Before the coating film on the surface is completely cured, it is wiped off by cloth or the like. Thus, the paint adhered to the projecting parts on the satin-finish surface is removed, and the surface is finished into a state abound in a mass effect with a composite color.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface treatment method l' for aluminum extrusion shaving, and its purpose is to express a satin-like texture on an aluminum extrusion material and to create a deep color tone with composite colors. It is about having it granted.

Conventionally, extruded aluminum material has a smooth surface and has been given a suitable alumite coloring treatment to give it a high gloss, but on the other hand, it has a bright appearance and has a bright appearance. It created a lively atmosphere.

As a result of careful study in view of the unique circumstances surrounding the BA increase of this bag, we sprayed small hard particles onto the surface of the extruded aluminum body material to form fine irregularities on the base surface. The surface of the blast-treated extruded material is coated to create a rut on the coating film, and the above-mentioned coating treatment is carried out. ! ! Piece c, Ir! The intended purpose was achieved by applying different colored paints to the surface and wiping off part of the surface coating.

By the method of the present invention, rL is 1 on the surface of the aluminum extrusion.
1! When JS grains are blown, the aluminum has a low ambiguity and is easy to plastically deform, and the combination of good thermal F and guiding properties results in a satin-like surface with dense unevenness. After painting the surface and curing the coating, paints of different colors are applied on top of it, and the surface coating is removed to create a blast-treated aluminum profile. The paint that adheres to the convex parts is preferentially removed compared to the paint that adheres to the concave parts.The satin-like texture and complex color on the surface of the n1 aluminum extrusion piece give it a heavy feel! It is possible to achieve a surface finish that looks like this.

In the present invention, the step of spraying hard particles onto the surface of the aluminum extrusion is carried out by placing the aluminum extrusion on a movable table and rolling at a speed of 2 to 5 rn/min, preferably 3 to amo. ρ, small hard particles such as grids (metal pieces) with a particle size of 0, '5 to 2LH, preferably 0.7 to 1,2U are applied to the surface of the nozzle with an air pressure of 5 to 10/d. The hard pellets may be applied by blasting or other known blasting methods.

In order to carry out the present invention, a protective film made of rubber or the like having an arbitrary punched pattern formed on the surface of an aluminum extrusion is brought into contact with the surface, and then the above-mentioned blasting process is performed on the surface of the aluminum extrusion. A pattern can be expressed.

According to the method of the present invention, it is possible to perform the same treatment on the surface of an aluminum extrusion piece in which a large number of creases are provided in close proximity to each other. You can get facial expressions.

The paint suitable for carrying out the present invention is an acrylic-based or an ester-based bath agent baking paint for the first coating, and has a low bulk.
As for the next paint, it is desirable to use a wiping paint with less solvent.

The coating process used in the present invention is applied after the first coating is applied to the blasted surface of an aluminum extrusion plate.
The L is dried with light using a known treatment method, and then its surface is coated with a second coat of paint of a different color, and before the surface coating film is completely cured, the L is coated with a fabric (liIvt). By removing the paint, the paint that has adhered to the convex parts of the satin-like skin can be removed very easily.

Incidentally, when performing the above-mentioned painting treatment, if the hardening of the coating film in the second coating progresses quickly, it is good to polish the dried surface coating film.

The method of the present invention is a combination K of satin-like □-like skin and a composite color pattern.
Therefore, it is possible to achieve a surface finish with a rich sense of solidity, and the processing process is extremely simple and can be applied on an industrial scale. The practical effects are remarkable, as it is extremely easy to administer.

36

Claims (1)

[Claims] The surface of the extrusion-molded aluminum mold piece is sprayed with small IC hard particles to form fine irregularities on the base surface, and the surface of the blast-treated mold material is painted and the coating film is made into a kliil.
A method for treating the bottom surface of an aluminum extrusion plate, which is similar to applying paints of different colors on the surface of the painted mold piece and wiping off a part of the surface paint film.