JPS59103800A - Surface treating method for accessory - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for surface treatment of jewelry having recesses,
A gold film is formed on the surface of an accessory having a recessed part by ion blasting or sputtering, then four parts of the metal are masked with an organic masking material, and then part of the gold film is removed by polishing.

Furthermore, b) After masking a part of the removed surface with an organic masking material of heat-resistant ink or paint, a titanium nitride film is formed on the entire surface by ion blasting treatment or snognotering treatment, and the gold film is peeled off. The titanium nitride film on the gold film is removed by stripping with a stripping solution, and then the heat-resistant organic mask layer on the recesses and surface of the metal is stripped with a stripping solution to remove the titanium nitride film on the organic mask material. By removing the titanium nitride film, a titanium nitride film is left on a part of the metal surface, and a gold film is also left on the recessed part, so that the recessed part and the surface of the accessory are colored in two colors.

FIG. 1 is a perspective view of the watch side according to a conventional example.As for the conventional two-tone formal method by dry plating, in FIG. There is a method in which a titanium nitride film 2 is coated by ion-blating treatment, and then a predetermined portion of the titanium nitride film is removed by mechanical processing such as polishing or grinding to obtain the color tone of the stellite fabric B.

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.

Further, when machining such as polishing or grinding is performed on the surface of the completed watch side 10, chips or the like come into contact with the titanium nitride film 2, causing scratches and often causing poor appearance. In particular, chips and the like accumulate in the recess 4, causing scratches and dirt, resulting in a poor appearance.

Another method is to form a gold film on the entire surface of the finished side made of four-part stellite by ion blating treatment, and after removing a part of this gold film by machining such as polishing or grinding, A titanium nitride film is formed by ion blasting, and then the gold film is peeled off using a stripping solution.At the same time, the titanium nitride film on the gold film is also removed.

On the finished side made by this method, the areas where the gold film was applied before the titanium nitride film was formed will have a Stellite texture (σ) color, and the areas without the gold film will have the golden color of the titanium nitride film.

However, since part of the gold film is removed by mechanical processing such as polishing or grinding, only different colors can be produced on each surface, and two tones cannot be formed on the same plane. Moreover, chips and the like accumulate in the recesses, causing scratches and dirt, resulting in a poor appearance.

The present invention solves the above-mentioned problems and provides an accessory such as an exterior part for a watch that is inexpensive, has two or more σ color tones, and further has two color tones on the concave portion and the surface, which has a stable and luxurious feel. It is intended for this purpose.

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

FIGS. 2 to 7 are partial cross-sectional views of the watch side, which are embodiments of the present invention, and show processing steps for making the watch side having a recessed part two-colored. As shown in FIG. 2, the entire surface of the well-cleaned completed Stellite watch side 1 is coated with a gold film 5 by ion blating treatment.

Incidentally, the gold film 5 is used as a mask material except for that attached to the recess 4. Copper, silver, etc. can be used as other metal mask materials, but gold is currently most suitable in terms of ease of peeling.

There is also a wet plating method for covering the mask, but it cannot be used because it does not adhere well to stellite, stainless steel, etc. and easily peels off during post-processing such as puff machining. do not have.

Next, as shown in FIG. 3, masking 6 is performed in the recesses 4 on the surface of the watch side 1 by screen printing using a heat-resistant ink made of an epoxy resin base mixed with a urea resin.

Note that heat-resistant ink based on silicone resin can also be used. The reason why the masking ink needs to have heat-resistant properties is because the heat generated during the ion blating process reaches a high temperature of approximately 240°C, and the heat-resistant ink used this time can withstand temperatures of 270°C.

Also, as a masking method, painting, brush painting, various printing, etc. are possible, and the optimal masking method is selected depending on the shape and accuracy of the item to be masked.

Next, put the masking-printed watch side 1 at room temperature for 15 to 20 minutes.
Leave it for a few minutes to prevent pinotholes and improve surface rehelinking.

Next 1. Temporary drying is performed at 00°C for 30 to 45 minutes, and then complete drying is performed at 23°C12O to 30 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 gas from remaining inside the ink.

Furthermore, if ion blating treatment is performed with gas remaining in the masking ink, the residual gas will leak out and react with titanium nitride, making it impossible to obtain the desired gold color.

Next, the surface of the watch side 10, which has been masked with the gold film 5 and the recesses 4, is subjected to mechanical processing such as polishing or grinding to remove the gold film 5 and expose the white stellite 3.

Next, as shown in FIG. 4, on the surface of the watch side 10 from which the gold film 5 has been removed, masking 7 is performed by screen printing on the portion where the white stellite 6 is to be left.

The masking ink, drying conditions, masking method, etc. used are the same as those for masking the recesses 4.

Next, the masking-printed watch side 1 is thoroughly washed and dried, and then the entire surface is coated with titanium nitride 2 by ion blasting as shown in FIG.

Next, the watch side 1 is immersed in a commercially available cyan-based gold stripping solution to strip the gold film 5 at ℃. At this time, as shown in FIG. 6, the part of the titanium nitride 2 on the gold film 5 is
At the same time, it is peeled off to become white stellite 6.

The peeling conditions are 70°C and 10 minutes of immersion.

Next, the masking ink is removed by immersing the watch side 1 in a stripping solution made of a mixture of chlorinated solvent, alcohol, ester solvent, formic acid, nonionic surfactant, and paraffin wax. At this time, as shown in FIG. 7, the portion of the titanium nitride 2 that rests on the masking ink 7 is peeled off at the same time as the masking ink 7, and becomes white stellite 6.

Further, the masking ink 6 in the recess 4 is also peeled off in the same way, and the gold film 5 remains in the recess 4.

It should be noted that peeling can be performed by immersion at room temperature for 10 to 15 minutes.

Also, if you want to remove the product faster, apply the remover solution to about 40°C.
This can be done in a short time by heating it to a temperature and then using an ultrasonic oscillator.

In addition, the paraffin wax in the above stripping liquid is used to prevent the solvent from evaporating, and the other components are combined to remove the masking ink under optimal conditions; other combinations may make it difficult to remove the masking ink. , there is a risk of soaking the side material.

Next, the peeled watch side 1 is washed and dried.

FIG. 8 is a front view of the watch side 1 having a concave portion completed by the above method, which has a gold color due to the titanium nitride 2, a gold color due to the gold film 5, and a white color due to the stellite 3.

The gold film 5 in the recess 4 has a lower hardness than the gold color of the titanium nitride 2 and is easily scratched, but since it is a recess, external forces are not directly applied to it and it can withstand use.

Also, this method θ) is particularly suitable when a small area of the total surface area of the watch side is colored gold and the remaining area is colored white with stellite.

Note that not only watches but also accessories such as bands and pendants can be made into two colors on the concave portions and surfaces by dry plating using the method described above.

In this way, the two-tone product produced by the present invention has a lower yield and lower yield than the two-tone product produced by the conventional method.
Workability has been improved, and it is now possible to easily create two colors on the concave portion and the surface, as well as two colors on the same plane.

In addition, it is possible to freely select pattern variations, and the present invention has the great effect of having excellent appearance quality with a sense of luxury, and being able to stably produce accessories such as exterior parts for watches and pendants. have

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a completed watch in a conventional example, Figs. 2 to 8 show an embodiment of the present invention, and Figs. The side partial cross-sectional view, FIG. 8, is a front view of the completed timepiece manufactured according to the present invention. 1...Clock side, 2...Titanium nitride, 6...Stellite, 4...Recess, 5...Gold film, 6... ...Recess masking ink, Fig. 2/. Fig. 5 2m 8I'''ζ)

Claims (1)

[Claims] A gold film is formed on the entire surface of a metal such as stainless steel, stellite, cemented carbide, etc., which has recesses, by ion blasting or sputtering, and then the recesses of the metal are coated with heat-resistant ink or paint. After masking with an organic mask system, a part of the gold film is removed by polishing, and a part of this removed surface is further masked with an organic masking material of heat-resistant ink or paint, and then the entire surface is subjected to YC ion blating. A titanium nitride film is formed by treatment or sputtering treatment, the gold film is peeled off with a stripping solution, the titanium nitride film on the gold film is removed, and then the recessed portions of the metal are removed. The organic masking material of the heat-resistant ink or paint on the surface is peeled off with a stripping liquid, and the titanium nitride film on the organic masking material is removed, thereby leaving the titanium nitride film on a part of the metal surface and removing the titanium nitride film from the recesses. A method for surface treatment of jewelry, characterized in that a gold film is left on the surface of the jewelry.