JPS6010790B2 - Manufacturing method of metal products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that the surface of the metal substrate 1 is subjected to surface treatments such as oxidation treatment and sulfurization treatment, and the surface of the metal substrate 1 is kept in a wet state before completing the surface treatment. This relates to a method for manufacturing metal products characterized by forming a clear layer 2 and then forming a competitive clear layer 3 thereon, the purpose of which is to provide a uniform surface condition on the surface of the metal base material. The object of the present invention is to provide a method for manufacturing metal products that retains the properties of metal products and has excellent resistance to weathering and discoloration.

The surface of the metal base material, which is copper or other metal with a steel finish, is colored by surface treatments such as oxidation treatment and sulfurization treatment, and then scratch patterns are applied by brushing etc. Since such patterning is generally done in an aqueous solution, a water-soluble anti-corrosion clear is applied.
After drying, the copper was prevented from discoloring by applying a clear such as a solvent-based acrylic clear that can be processed at low temperatures without discoloring the copper, but using such a solvent-based clear tends to scratch the surface of the copper. Furthermore, when contaminated with oil, the clear layer peeled off, making it impossible to obtain sufficient weather discoloration resistance for copper.

If a two-component curing type polyurethane clear was used to overcome these drawbacks, the coating process would not only be troublesome due to the two-component curing process, but it would also be expensive. Furthermore, attempts have been made to dry the surface of the copper after coloring and patterning, but the surface of the copper is not dried evenly during drying and is partially oxidized in the air, making it impossible to obtain copper products with a uniformly treated surface. There wasn't. Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

A sheet 5 in which the steel foil 1 is laminated on the surface of the synthetic resin layer 4 is passed through a surface treatment device 6, and the surface of the steel foil 1 is colored by oxidation treatment or sulfurization treatment. surface remains moist.

In the meantime, an aqueous anti-rust clear was applied to the surface of the copper foil 1, and after drying in a dryer 7 at 80:00, an acrylic adhesion clear was applied with a roller 8, and then in a dryer 9 at 250 pm. Phosphate for 45 seconds to 2 minutes at <0>C. In the obtained sheet 5, the Akatsuki clear is completely cured, the copper foil 1 is not discolored at all, the surface of the copper foil 1 is uniformly colored, and the water-soluble lock-proof clear layer 2 is not discolored. A tough Akatsuki clear layer 3 was formed on the surface.
Note that when the water-soluble anti-rust clear layer 2 is dried and then a hairline is formed on the surface of the water-soluble anti-rust clear layer 2 to make it a dregs surface, the adhesion to the clear layer 3 with a crease is further improved. On the other hand, when moth attachment was carried out for more than 2/3 minutes, the steel foil 1 was completely discolored to red. In this embodiment, since the synthetic resin layer 4 is formed on the back surface of the metal base material 1, the metal base material 1 is also protected from the front surface. In the present invention, if necessary, after the surface of the steel foil is treated, a scratch pattern or the like may be applied using a brush or the like. In addition to steel foil, the metal base material may be a metal other than copper coated with copper, or a synthetic resin layer coated with copper by vapor deposition. Acrylic-based materials, alkyd-based materials, polyester-based materials, and the like are used as the clear material. The dawning conditions for Akatsuki Clear vary depending on the type of Akatsuki Clear, but the key point is that it is necessary to harden the Akatsuki Clear in a short time without discoloring the copper, and usually within 3 minutes at a high temperature of 200 qo or higher. Complete the bidding. In the present invention, the surface of the metal base material is subjected to surface treatment such as oxidation treatment and sulfurization treatment, and the water-soluble clear layer is formed before the surface treatment is completed while the surface of the metal base material is kept in a wet state. It is possible to obtain a loss-sewn metal product in which the surface of the base material maintains a uniform surface condition without air oxidation, and the water-soluble clear layer has clear heat conduction to the metal base material during competition. It also acts as a barrier to prevent discoloration due to heat on the surface of the metal substrate.Furthermore, since it forms an anti-repellent clear layer on top of the water-soluble clear layer, it has excellent resistance to discoloration due to strong ruts on the surface. Metal products can be obtained at low cost.

Brief explanation of the drawings Figure 1 is a process diagram of an example of the present invention, Figure 2 is a process diagram of an example of the present invention.
The figure is a sectional view of an example of a product obtained by the present invention, in which 1 is a metal base material, 2 is a water-soluble clear layer, and 3 is a baked clear layer.

Figure 1 Figure 2

Claims (1)

[Claims] 1 Surface treatment such as oxidation treatment and sulfurization treatment is applied to the surface of the metal base material, and a water-soluble clear layer is formed before the surface treatment is completed to keep the surface of the metal base material in a wet state, and then a clear baking layer is applied on top of the surface treatment. A method for manufacturing metal products characterized by forming layers.