JPS59172625A - Titanium frames of pair of spectacles - Google Patents

Abstract

PURPOSE:To form grained faces or hairline faces unobtrusive of fingerprints by stopping grinding till an extent leaving roughness of grained faces or hairline faces and forming golden films by dry type plating when necessary. CONSTITUTION:Industrial pure titanium of the second class is used as a starting material, and the parts of the frames of a pair of spectacles are formed, and the imperfectly polished assembling parts leaving grained faces or hairline faces are once wiped with alcohol to clean them, and then, fingerprints are given on the grained faces. The fingerprints are not conspicuous, and easily erased by wiping them with cloth, leaving any differences from the other places, like results being found on the test made on the hairline faces. Next, reddish golden films composed essentially of titanium nitride contg. titanium carbide are formed on the surfaces of the assembling parts, and fingerprints are given to the grained and hairline faces, and it is found higher effects than before the dry plating in the unobtrusiveness of the fingerprints and easiness of erasion.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an eyeglass frame partially or entirely made of titanium or a titanium alloy.

(Background of the Invention) Eyeglass frames are commercially available that use titanium as the main suction material and have the surface dry-plated with TINICrN or the like as the main component using the ion-blading method. It is difficult to achieve an even and uniform finish on a glossy surface. Furthermore, if the entire surface or most of the surface of the titanium eyeglass frame is given a light-selecting finish, scratches and uneven light-selecting will become noticeable, and the frame will have the character of an ornament, and its commercial value will decrease.9/
Kome, is rarely implemented.

On the other hand, if the surface is finished with key areas or hairline finish, is it possible to make scratches and uneven light selection less noticeable?
(b) Whether it is a titanium 11 surface or (b) a dry-plated surface such as TiN using the ion brate ink method, fingerprints are likely to form when touched by hand, and are difficult to remove. 9 had the disadvantage that if you rubbed it too hard, the color of that area would become a dull, dirty color with less metallic luster than pure, pure blood.

Titanium eyeglass frames are preferred to have a gold finish, and this gold color is generally made of TIN or +4 TiN as the main component, and can be formed with other elements such as carphone with a little knowledge. When such a golden film is formed on the matte surface or hairline surface of titanium, fingerprints are easily noticeable and difficult to remove.

This phenomenon of fingerprint stains is unique to titanium or titanium alloy base materials, and is a phenomenon unique to titanium or titanium alloy base materials. There is no problem with fingerprints with eyeglass frames without.

Titanium 111+lens frame il''i has the features of being lightweight and highly corrosion resistant, but wet plating is extremely difficult and dry plating is unavoidable in order to form a golden film.

However, 1. When dry plating is applied as described above, the drawback of fingerprint stains becomes particularly noticeable, which has become a [+2] problem. Regardless of whether a gold coating is applied or not, glasses are often touched by hands on a daily basis, so there is an urgent need to resolve the issue of fingerprint stains on titanium thread glasses.

(Objectives of the Invention) An object of the present invention is to solve the above-mentioned problems and to obtain a titanium-based eyeglass frame having a matte surface and a hairline surface in which fingerprints are not noticeable.

(Summary of the Invention) The present invention involves finishing a titanium base material into a matte finish or hairline surface by a conventional method, and then polishing it before dry plating, and stopping this polishing to the extent that unevenness remains on the matte finish or hairline surface. Then, if necessary, a gold film is applied by dry plating to provide a titanium or titanium alloy eyeglass frame in which fingerprints are not noticeable.

The present invention will be explained below with reference to Examples.

(Example) Using JIS industrial pure titanium class 2 as a material, eyeglass frame parts were formed using a known method such as wire drawing, and the parts were brazed together using Ag=Zn brazing material to form assembled parts. Later, the oxidized scale produced by the heating during brazing was removed by puff polishing, and then the entire surface was finished to a glossy surface by barrel polishing. In this state, the glossy surface is not completely smooth, and some small dents and scratches remain, making it slightly less beautiful than the surface of the eyeglass frame. .

After applying hairline processing to some of the assembled parts and pasting masking tape on some other surfaces to leave the hairline processed surface and glossy surface, ≠ No. 300 glass beads were heated to 6 using air pressure. A satin finish was applied to the entire surface of the silk stand parts using fukituri. The satin-finished surface was observed by microcasting and was found to have a crater-like uneven surface with sharp ridge lines.

FIG. 1 is a chart of the surface roughness of this satin surface measured with a touch-button surface roughness meter, and the roughness was approximately 4 μm.

The eyeglass frame assembly parts obtained in this way are (At, (B)
After preparing two sheets and peeling off the masking tape, one of the sheets (N) was placed in a metal polishing barrel polishing machine VC and polished for 2 hours before being taken out. As shown in Figure 2, the surface of the raised area had changed to a plateau-like shape, and the surface roughness had decreased to about 2 μm. Visual inspection of the surface showed that the ridgeline had changed to a plateau-like shape, and the surface roughness had decreased to approximately 2 μm. The surface of the surface was uniform and beautiful, with a slightly brighter gloss than the original.A similar tendency was observed for the hairline surface.As a result, for the assembled part (A), There are three surface conditions: semi-gloss hairline surface, glossy surface, and semi-gloss pear surface.
There was ample contrast between the two.

Here, for the assembly part whose pear surface and -\alignment surface were thoroughly polished and the assembly part (B) which was not polished, both were partially wiped with alcohol and cleaned.
When fingerprints were placed on the pear surface in the same way, the result of this example was (
In A), fingerprints are noticeable, whereas in Comparative Example (B)
It was noticeable that the finger was squeezed. Furthermore, when I wiped the fingerprints with Uzuki, I found that the fingerprints on the front part (A) disappeared easily, and the color did not change as it was the part where no other fingerprints were found.
) i-, 1 bill b・ can be easily removed. If you rub it hard, the fingerprints will disappear, or the stains from the finger squeeze will be spread, and the color will be different from the other dirtier parts. There's only one color now.

This difference in fingerprint stains (Al, (B)) had a similar tendency on the hairline surface.

These two assembled parts (A), (Bik) are cleaned again, placed in an ion blating device, and a mixed gas of hydrogen atoms and hydrocarbons is used as a reaction gas to evaporate the titanium. A reddish gold plating layer containing titanium carbide (Tic) and containing titanium nitride (TiN) as a main component was applied to the entire surface of the part to a thickness of 1 μm.

Assembled parts (A)', (B) with the obtained golden film
)', the above-mentioned fingerprint smear test was conducted on the matte surface and the hairline surface respectively, and the results showed that the ease with which fingerprints were formed and the ease with which they could be removed were compared to the assembled parts (A) before dry plating. There is a bigger difference than the difference between CB1 (
It was found between A)' and (B)'.

Also, the appearance and top are also real! The assembled part (8') of the example was cleaner and more luxurious than the assembled part (B)' of the comparative example.

In particular, the latter (B)' gives a feeling that the base material is woody,
It felt low class.

In addition, (a) 1'L'1-3 was used instead of pure titanium as the material.
AI-2,5V alloy or 1d'I'1-2AI-21V
When using 1N alloy grapes, when changing the particle size of to + crow beads, () → crow beads r (when replacing satin finish with SiC, to) when dry plating other substances instead of TIN, ( The same fingerprint test as in the previous example was conducted for dry plating using spackle cylinder or vacuum evaporation method instead of feather ion brate ink. Compared to conventional non-polishing products, it was observed that fingerprints were less likely to be attached and grooves were easier to remove.Furthermore, instead of barrel polishing after the above-mentioned matte finish, Hough polishing, chemical polishing, and electrolytic polishing were used. Similar results can also be obtained if the unevenness of the matte surface remains.

The degree of unevenness on the re-ground surface after satin finish is preferably in the range of 1/15 to 415 of the roughness of the satin finish, and the grain size of the sand used for satin finish is preferably in the range of +50 to ≠ 600. Beyond this range, the effect on fingerprints is small, or the surface tends to have an appearance similar to a glossy surface.

(Effects of the Invention) As described above, according to the present invention, it is possible to beautifully finish the surface of an eyeglass frame using a titanium or titanium alloy base material that is lightweight and highly corrosion resistant, and fingerprints, which were a drawback of the conventional method, can be finished. A suitable eyeglass frame is provided that does not have the problem of being easily attached and difficult to remove.

[Brief explanation of drawings]

FIG. 1 id, I for comparison to embodiments of the invention
This is a chart showing measurements of surface roughness of silk and parts that have only been subjected to ll + shell 1 tasseled parts (B) and tamashi satin finish. Figure 2 shows the eye casting and frame red stand parts in an embodiment of the present invention)
This is a chart showing the measurement of S surface roughness. Applicant Nihon Kogaku Kogyo Co., Ltd. Agent Furu Watanabe F1 Kasumi 2

Claims (1)

[Claims] After making part or all of the surface of the titanium or natan alloy base phase into a satin palindrome (hairline surface), polishing is performed, and this polishing is done to the extent that only the unevenness of the matte surface or hairline surface remains, and then it is polished to a smooth finish. Eyeglass frames made of titanium or titanium alloy, characterized by dry plating according to the requirements.