TWI526575B - Method for forming metal layer on board - Google Patents

Description

Sheet metal forming manufacturing method

The present invention relates to a method of producing a metal on the surface of a sheet.

In the process of forming a metal layer on the surface of the plate, the plate is first immersed in a sulfuric acid tank for pickling to increase the adhesion of the surface of the plate, and then the plate material is plated with a metal layer by electroplating.

However, the pickling step causes considerable contamination, and the pickling step inevitably causes the entire sheet to be plated to form a metal layer. Therefore, if a pattern or text is to be formed on the surface of the sheet, it must be subjected to development or etching. It is quite time consuming and costly.

The main object of the present invention is to provide a method for producing metal on the surface of a sheet material, which can avoid contamination caused by conventional pickling and form a metal layer of a desired pattern or text.

In order to achieve the above object, the present invention provides a method for producing a metal surface on a sheet material, comprising the steps of: preparing a sheet; coating the ink: coating a metal-containing conductive catalyst ink on at least part of the surface of the sheet to form an ink layer; Drying: drying the ink layer to fix the ink and the plate; and plating: immersing the plate in a plating tank for chemical plating, wherein the plating bath is provided with a plating solution, and the composition of the plating solution comprises Water, alkali, copper ions and aldehydes The compound, copper ions are catalyzed by the ink layer and reduced to copper atoms attached to the plate to form a copper plating layer.

Thereby, the ink layer is only coated on a specific surface of the board, and only the ink layer is subjected to an electroplating reaction to form a metal layer of a specific pattern or character, and contamination by pickling can be avoided.

S1‧‧‧ Preparation

S2‧‧‧coated ink

S3‧‧‧Drying

S4‧‧‧ cleaning

S5‧‧‧ plating

S6‧‧‧ plating

S7‧‧‧ Painted

S8‧‧‧ grinding

S9‧‧‧protective paint

Figure 1 is a flow chart of the steps of the present invention.

The following is a description of the possible embodiments of the present invention, and is not intended to limit the scope of the invention as claimed.

Referring to FIG. 1 , the present invention provides a method for producing metal on the surface of a sheet material, comprising the following steps: preparing S1: preparing a sheet, wherein the material of the sheet is selected from the group consisting of polyester and steel sand, PET plastic, ABS plastic. , PC plastic, calcium silicate board, plastic film, ceramic fiberglass board and carbon fiber material group.

Coating ink S2: coating a metal-containing conductive catalyst ink on at least part of the surface of the plate to form an ink layer, more specifically, the conductive catalyst ink is sprayed, coated, coated or printed On the surface of the sheet, the conductive catalyst ink contains palladium metal particles. In particular, the conductive catalyst ink may be applied only to a portion of the surface of the sheet to present a special pattern or text.

Drying S3: drying the ink layer to bond the ink to the board, and in the main embodiment of the invention, drying at a temperature of 80 to 150 degrees Celsius.

Cleaning S4: clean the surface of the board with water, which is used for cleaning The addition of about 0.1% of reducing agent to the water has accelerated subsequent reduction rates.

S5: the plate is immersed in a plating bath for chemical plating, and the plating bath is provided with a plating solution, the composition of the plating solution comprises water, alkali, copper ions and aldehyde compounds, and the copper ions are subjected to The oxidization of the ink layer is reduced to copper atoms attached to the plate to form a copper plating layer. In this embodiment, the aldehyde compound is formaldehyde, wherein the copper ions are catalyzed by palladium metal in an alkaline environment. The formaldehyde is reduced to copper metal and deposited on the substrate, and the thickness of the copper plating layer can be controlled by the soaking time.

Electroplating S6: immersing the plate in an electrolytic cell and energizing it for electrolysis Metal ions in the groove are attached to the copper plating layer to form a plating metal layer. The plating bath is filled with a plating solution. In this embodiment, the composition of the plating solution contains copper sulfate (about 175-220 g/ L), sulfuric acid (about 90-110g / L), chloride ion (about 60-80ppm) and water, by which a plating solution can form another electroplated copper layer on the copper plating layer to strengthen the hardness of the copper metal , wear resistance and metallic color.

Lacquering S7: at least partially coating, spraying or forming a black lacquer layer on the electroplated metal layer.

Grinding S8: grinding the black lacquer layer with a manual or power tool to partially expose the plated metal layer and the copper plated layer, and mixing the copper metal with the black lacquer to expose the plate to a more natural bronze color.

The upper protective paint S9: a protective paint is coated on the plate to avoid oxidation of the copper plating layer and the plating metal layer, wherein the protective paint is a transparent lacquer.

Through the above steps, a plate with a specific pattern or a letter bronze metal layer can be provided, which is finely plated and has no voids, and can be prevented from being contaminated by pickling soaking. Environmentally friendly, and the solution in the electrolytic cell can be reduced by electrolysis to facilitate recycling.

S1‧‧‧ Preparation

S2‧‧‧coated ink

S3‧‧‧Drying

S4‧‧‧ cleaning

S5‧‧‧ plating

S6‧‧‧ plating

S7‧‧‧ Painted

S8‧‧‧ grinding

S9‧‧‧protective paint

Claims (10)

A method for manufacturing a metal surface of a sheet material comprises the steps of: preparing a sheet; preparing a sheet; coating the ink: coating a conductive catalyst ink containing metal on at least part of the surface of the sheet to form an ink layer; drying: drying the ink layer Drying and fixing the ink and the plate; plating: immersing the plate in a plating tank for chemical plating, the plating bath is provided with a plating solution, and the composition of the plating solution comprises water, alkali, copper ions and aldehyde a compound, copper ions are catalyzed by the ink layer and reduced to copper atoms attached to the plate to form a copper plating layer; wherein after the "drying" step, a "cleaning" step is followed by further "chemical" The step of plating, wherein in the "cleaning" step, the surface of the plate is cleaned with water. The method for producing a surface metal of a sheet material according to claim 1, wherein the material of the sheet material is selected from the group consisting of polyester and steel sand mixed materials, PET plastic, ABS plastic, PC plastic, plastic film, calcium silicate board, ceramic. A group of fiberglass sheets and carbon fiber. The method for producing a metal surface of a sheet material according to claim 1, wherein after the step of "plating", a step of "plating" is performed, and in the step of "plating", the sheet is immersed in an electrolytic bath and energized. Electroplating is performed to adhere metal ions in the electrolytic cell to the copper plating layer to form a plated metal layer. The method for producing a surface metal of a sheet material according to claim 3, wherein the plating bath is provided with a plating solution, and the composition of the plating solution comprises copper sulfate, sulfuric acid, chloride ions and water. The method for producing a surface metal of a sheet material according to claim 3, wherein after the "electroplating" step Further, in a "painting" step, in the "painting" step, at least a portion of the electroplated metal layer is coated, sprayed or formed into a black lacquer layer. The method for producing a metal surface of a sheet material according to claim 5, wherein after the "painting" step, a "grinding" step is performed, and in the step of "grinding", the black lacquer layer is manually or powered. Grinding is performed to partially expose the plated metal layer and the copper plated layer. The method for producing a metal surface of a sheet material according to claim 6, wherein after the "grinding" step, a step of "top protective paint" is applied, and in the step of "top protective paint", the sheet is covered with a protection. The paint prevents oxidation of the copper plating layer and the plating metal layer. The method for producing a surface metal of a sheet material according to claim 1, wherein in the step of "coating the ink", the conductive catalyst ink is sprayed, coated, coated or printed on the surface of the sheet. The method for producing a surface metal of a sheet material according to claim 1, wherein the conductive catalyst ink comprises palladium metal particles. The method for producing a surface metal of a sheet material according to claim 1, wherein the step of "drying" is carried out at a temperature of 80 to 150 degrees Celsius.