JPS6041709B2 - Manufacturing method for copper-covered rain gutters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves coloring the surface of a copper foil 1 through chemical treatments such as sulfurization and oxidation, and then coating the colored surface 2 with a transparent protective layer 3 to form a thin sheet 4. , but later this thin sheet 4
The purpose of this method is to produce a copper-covered rain gutter that can be obtained at low cost through a simple process. The manufacturing method is provided.

Conventionally, when manufacturing copper-covered rain gutters using plastic as a base, copper plating was applied to the outer circumference of the plastic pipe, and then the outer circumference was sequentially colored and painted, but first, the plating process for the plastic was complicated. Furthermore, since the outer periphery of the pipe must be colored or painted, it requires a larger space than processing a flat plate, and the processing is extremely difficult as it involves processing a curved surface. It had some serious flaws.

The present invention aims to eliminate such conventional drawbacks,
A detailed explanation will be given below based on the attached drawings.

A copper foil 1 in the form of a flat sheet is prepared. When it is thin, it may have a removable protective sheet on the back side. The surface of this copper foil 1 is subjected to chemical treatments such as sulfurization and oxidation to create a copper foil 1.
The surface itself is colored black or green. Then, after drying,
The colored surface 2 is treated with a rust preventive agent if necessary, and the outer periphery is coated with a hardening type clear such as an ultraviolet curable paint or urethane resin paint and cured to prevent weather-resistant discoloration of the colored surface 2. The transparent protective layer 3 is covered with the liquid adhesive to form a thin sheet 4 as shown in FIG. 2. Thereafter, this thin sheet 4 is pasted on the outer periphery of, for example, a hard polyvinyl chloride or other plastic pipe 5, as shown in FIG. 3, with the transparent protective layer 3 exposed on the outside. This pasting can be done by applying an appropriate adhesive such as epoxy resin to the back side of the thin sheet 4, and wrapping it around the outer circumference of the plastic pipe 5. The top and bottom should be in a straight line, similar to the ridged surface of a metal downpipe, and the joint should be hidden behind the back surface during construction. In the present invention, as mentioned above, in manufacturing the oxidized metal-like rain gutter mainly made of plastic pipe, the copper foil is colored in advance through chemical treatments such as sulfurization and oxidation, and then the coloring is performed. A transparent protective layer is applied to the surface to form a thin sheet, and this thin sheet is then attached to the outer circumference of the plastic pipe, which previously required the most complicated process. Plating on the pipe is no longer required, and there is an advantage that copper surface treatment can be applied to the outer periphery of the plastic pipe simply by pasting a thin layer sheet based on copper foil.Moreover, coloring of the copper surface and formation of a transparent protective layer are also easier than conventional methods. Instead of a curved surface treatment, it can be easily done as a flat surface treatment, and the space required for each treatment is small, and the entire process is simplified, making it possible to create a rain gutter with a gorgeous copper finish. It has the advantage that it can be obtained at a low cost.

The present invention will be specifically described below based on examples.

〔Example〕

A copper foil with a thickness of about 100μ is immersed in a 1% potassium sulfide aqueous solution and passed through it to generate black copper sulfide on the surface, and then a 1% benzotriazole aqueous solution is applied to the surface of this copper sulfide. After applying rust prevention treatment, a urethane resin-based clear was applied to the surface and baked and hardened to obtain a thin sheet.

Next, an epoxy resin was applied to the back side of this thin sheet, and the thin sheet was attached to the outer periphery of a hard polyvinyl chloride plastic vibrator so that the transparent protective layer was on the outside, to obtain a copper decorative downpipe.

[Brief explanation of the drawing]

1 to 3 are schematic process explanatory diagrams of an embodiment of the present invention. In the figure, 1 is a copper foil, 2 is a colored surface, 3 is a transparent protective layer, 4 is a thin layer sheet, and 5 is a plastic vibe.

Claims (1)

[Claims] 1 The surface of the copper foil is colored by chemical treatments such as sulfidation and oxidation, and then a transparent protective layer is applied to the colored surface to form a thin sheet, and this thin sheet is then applied to the outer periphery of a plastic pipe. A method for manufacturing a copper-covered rain gutter characterized by pasting.