JPS59193270A - Surface treatment of adornment - Google Patents

Abstract

PURPOSE:To stably form a bicolor tone on the same plane, by removing a part of a heat resistant coating film applied onto the entire surface of an adornment, forming a heat resistant mask on a part of said separated surface, forming a titanium nitride film on the entire surface, and then removing said coating film and the mask. CONSTITUTION:Heat resistant paint is applied onto the entire surface of a watch-case 1 made of stellite by a dipping method for instance and then dried to form a heat resistant coating film 4. Then, the coating film 4 is removed from the surface by grinding or the like to expose white stellite 3. Heat resistant ink is mask printed onto the part where the stellite 3 on the separated surface is expected to be left, to form a heat resistant mask 5. This case 1 is left standing at an ordinary temp. for a while, tentatively dried at a predetermined temp. for a predetermined time and then completely dried. After said case 1 is washed and dried, a titanium nitride film 6 is applied onto its entire surface by ion plating or the like. Then, the case 1 is immersed in a stripping liquid to peel off the coating film 4 and the mask 5 together with the film 6. Hence, a surface of the film 6 of white stellite 3 is made golden is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface treatment method for accessories such as hour δ side, watch bands, pendants, etc. The entire surface of the accessories is coated with silicone heat-resistant paint by dipping or spray coach ink. A heat-resistant coating film is formed, a part of the heat-resistant coating film is removed, a part of the removed surface is masked with heat-resistant ink to form a heat-resistant masker, and the entire surface is nitrided by ion blasting or sputtering. A titanium film is formed, and the heat-resistant coating film and the heat-resistant mask are peeled off using a synergist, and the titanium nitride film on the heat-resistant coating film and the titanium nitride film on the heat-resistant mask are removed to partially remove the metal surface. By leaving a titanium nitride film on the surface of the jewelry, the surface of the jewelry becomes two-tone? It is characterized by being strained.

FIG. 1 is a perspective view of a conventional watch 11,
As for the conventional method of forming two tones using dry agate, for example, after coating the entire surface of the finished side 1 made of stellite with a titanium nitride film 2 by ion-blating treatment, predetermined parts are formed by machining such as polishing or grinding. There is a method to remove the titanium nitride film of the sprite 6 so that the color tone of the sprite 6 fabric does not appear in two colors.

In this method, since the titanium nitride film 2 is removed by mechanical processing such as polishing or grinding, only different colors can be produced on each surface, and two colors cannot be formed on the same plane. Furthermore, the completed clock side 10
When mechanical processing such as polishing or grinding is performed on the surface, chips or the like come into contact with the titanium nitride film 2 and cause scratches, which tends to cause many appearance defects. Also, in this method, the part where the titanium nitride film is removed is
This is fine if the amount is small or the location is easy to remove, but there is a problem if the area to be removed is large or the location is difficult to remove, such as in a groove.

Therefore, as an alternative method, a gold film is formed on the entire surface of the finished side made of Stellite by ion blating treatment, and after removing a part of the gold film by mechanical processing such as polishing or grinding, the entire surface is There is a method in which a titanium nitride film is formed by ion blasting, and then the gold film is peeled off using a stripping solution to remove the titanium nitride film on the gold film. On the finished side made by this method, the areas where the gold film was present before the titanium nitride film was formed have the color tone of Stellite fabric, and the areas where there was no gold film have the golden color of the titanium nitride film.

Therefore, this method is advantageous when increasing the area of the stellite fabric, but since part of the gold film is removed by mechanical processing such as polishing or grinding, the titanium nitride film is coated without using the gold film. As in the case of 3D, it is only possible to create different colors for each surface, and it is not possible to form two tones on the same plane. Furthermore, a more serious problem than the above-mentioned problem of two tones on the same plane is that pure gold is used to form the gold film on the entire surface of the watch side, and the ion blating process is used, so the cost of forming the gold film is very high. <Workability is also poor.

The present invention aims to solve the above-mentioned problems and provide accessories such as watch exterior parts that are inexpensive, stable, and have a luxurious feel and have two or more color tones on the same plane. There is.

Embodiments of the present invention shown in the drawings will be described below.

FIGS. 2 to 6 are partial cross-sectional views of the watch side, which are one embodiment of the present invention, and show the processing steps for creating two colors on the same plane of the watch side. As shown in FIG. 2, the clock side 1 of the well-cleaned completed stellite is dipped in a silicone-based heat-resistant paint, coated on the entire surface, and dried to form a heat-resistant paint film 4. Incidentally, the coating method may be a commonly used painting method such as Air Nubray painting. The drying conditions are as follows: 180° after being left at room temperature for 20 to 30 minutes.
Drying is performed for 30 minutes at a temperature of 2000G. The optimal coating thickness is about 20 microns, and the coating thickness in dipping is controlled by the viscosity of the heat-resistant paint and the time it takes to pull up the clock side. In addition, as other heat-resistant paints, inorganic paints containing sodium silicate as a main component and paints containing epoxy resin as a main component can also be used. The reason why a heat-resistant coating film with heat-resistant properties is necessary is that the heat generated during the ion blating process reaches a high temperature of approximately 240°C.
This is because the heat-resistant coating film used this time can withstand temperatures of 350°C.

Next, as shown in FIG. 3, the heat-resistant coating film 4 is removed by mechanical processing such as polishing or grinding from the surface of the watch side 10 on which the heat-resistant coating film 4 has been formed, to reveal a white Stellite filter.

Next, as shown in Figure 4, on the surface of the watch side 10 from which the heat-resistant coating film 4 has been removed, use 1Illll thermal ink consisting of a mixture of urea resin and an epoxy resin base on the part where you want to leave the white Stellite 6. A heat-resistant mask is formed by screen printing. Note that the heat-resistant mask 5 may also be made of silicone resin. The reason why the heat-resistant mask 5 having heat-resistant properties is necessary is that, like the heat-resistant coating, the heat generated in the ion blating process reaches approximately 240°C.
The heat-resistant mask used this time can withstand temperatures of 270°C. Various types of printing such as tacho printing and brush painting are also possible as masking methods, and the optimal masking method is selected depending on the shape and accuracy of the item to be masked.

Next, the masked watch side 1 is left at room temperature for 15 to 20 minutes to prevent pinholes and improve surface leveling. Next 1. O0801 Perform temporary drying for 30 minutes to 45 minutes, then dry at 230°C for 20 minutes to 3 minutes.
Completely dry for 0 minutes. The purpose of temporary drying is to prevent the masking-printed ink from hardening rapidly from the surface and to gradually harden from the inside to prevent residue from remaining inside the ink. When ion blating is performed with gas remaining inside the heat-resistant mask, the remaining gas leaks out and reacts with titanium nitride, resulting in the desired gold color. ! ) can't be done.

Next, the open side 1 after masking printing is thoroughly washed and dried, and as shown in FIG. 5, the entire surface is covered with a titanium nitride film 6 by ion blasting.

Next, chlorine-based solvents, ester-based solvents, hydrocarbon-based solvents,
Immerse the watch side 1 in a stripping solution consisting of a mixture of alcohol, formic acid, nonionic surfactant, and paraffin wax,
Then, remove the heat-resistant coating film 4 and the heat-resistant mask 5 together with the titanium nitride film 6 as shown below.

At this time, as shown in FIG. 6, one part of the titanium nitride film 6 that rides on the heat-resistant coating 4 and the heat-resistant mask 5 is coated with the heat-resistant coating 4.
At the same time as the heat-resistant mask 5, it is peeled off to form a white sprite 6, and the titanium nitride film 6 directly coated on the stellite B remains and that portion becomes gold-colored.

Note that the peeling stripes can be peeled off by immersion for 10 to 15 minutes at room temperature. Also, it peels off quickly and IIZ
If not, heat the stripping solution to 40℃ and use an ultra-leech wave oscillator to sell it in a short time.The paraffin wax in the stripping solution is used to prevent solvents from evaporating, and the other components This is a combination of peeling a heat-resistant coating film and a heat-resistant mask under optimal conditions, and with other combinations, it may be difficult to peel off or it may not attack the side material and may be dangerous.

Next, after the peeling process, the "t" side is washed and dried. Figure 7 shows the front side of the clock side 1 completed by the above method [
It has a gold color due to the titanium nitride film 6 and a white color due to the stellite 3.
It is suitable for cases where a small area of the total surface area of 1 is colored gold and the remaining area is colored white stellite.

In addition, not only for watches but also for accessories such as bands and pendants.
3. As mentioned above, the two-tone VCt product made by the present invention is cheaper and may be cheaper than the two-tone product made by the conventional method. Workability and yield are improved, and two-coloring on the same plane is also possible.
Moreover, it is possible to freely select pattern variations.

Therefore, the present invention has the great effect of being able to stably produce accessories such as watch exterior parts that have a luxurious appearance and excellent appearance quality.

In the above embodiment, Stellite Y was used, but instead of Stellite, stainless steel or a metal based on a cemented carbide metal may be used.

[Brief Description of the Drawings] Figure 1 is a perspective view of the completed watch side of a conventional example, Figures 2 to 7 are an embodiment of the present invention, and Figures 2 to 6 are a perspective view of the watch side. Partial cross-sectional view of 8'' 11I without showing the surface treatment process,
FIG. 7 is a front view of the 1'L completed timepiece manufactured according to the present invention. 1...Clock side, 2.6...Titanium nitride film, 6
-・Stellite, 4・・Heat-resistant coating film, 5・・・・
Heat resistant mask.

Claims (1)

[Claims] Form a heat-resistant coating film of silicone-based heat-resistant paint on the entire surface of metal such as stainless steel, Stellite, and cemented carbide by dipping or spray coating 1. After drying, remove a part of the applied heat-resistant coating surface. 1-. Mask printing is performed on a part of this removed surface using heat-resistant ink to form a heat-resistant mask, and after drying, a titanium nitride film is formed on the entire surface by ion blasting treatment or sputtering treatment, and the heat-resistant coating film and An accessory characterized in that the heat-resistant mask is peeled off with a stripping solution to remove the side heat coating film and the titanium nitride film on the heat-resistant mask, leaving the titanium nitride film remaining on a part of the metal surface. Surface treatment method.