JP2003337306A - Spectacle frame and components thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spectacle frame formed by combining a titanium material and a plastic material with which finish plating of metallic portions can be easily performed and components thereof. <P>SOLUTION: The spectacle frame and the components thereof are formed of titanium or titanium alloy and after gold or gold alloy is plated as ground surface plating to part or the whole of the titanium or the titanium alloy, the plastic material is molded and is subjected to polishing and finish plating. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectacle frame in which titanium or a titanium alloy (hereinafter referred to as "titanium material") and a plastic material are combined, and a component thereof.

[0002]

2. Description of the Related Art Generally, a spectacle frame is, for example, as shown in FIG. 1, a temple 1, a lens frame 2, a bridge 3, an edge 4, a hinge 5, a blow tooth 6, a butterfly leg 7, and a wading 8 if necessary. Each of the parts is used to connect the pair of lens frames 2 by the bridge 3 and, if necessary, the wading 8,
A butterfly leg 7 is attached to the inner edge of the lens frame, and a temple 1 is attached to the outer edge of the frame via a blow tooth 6, a sword 4, and a hinge 5.

Various materials such as metal and plastic are used as the materials used for these spectacle parts, but recently, especially, the excellent function of the spectacle frame made of metal and the design and shape of the plastic material are used. From the point of view of newness, products that use both in combination have been widely used.

[0004] As the metal material constituting the spectacle frame and the parts thereof made of such a composite material of metal and plastic material, materials such as nickel silver, nickel / chromium alloy, stainless steel, etc. are used, and a noble metal for final finishing. Some are finish-plated by plating. These products have poor corrosion resistance of the materials themselves, and since they contain a large amount of nickel, there are problems such as the weight of the materials, and improvements are desired.

In recent years, allergy due to nickel has been particularly regarded as a problem. From the viewpoint of prevention of nickel allergy, strength, lightness, etc., titanium is examined as a material which is excellent in corrosion resistance and does not contain nickel at all as a suitable material for this use. Has been done. However, when the metal material is simply changed to titanium material, it is necessary to perform processing at a high temperature of 250 ° C. or higher during the plating processing in order to perform plating processing on the titanium material, and the conventional processing method is applied as it is. Even then, final finishing plating could not be performed, and an eyeglass frame and eyeglass parts in which a titanium material and a plastic material were combined could not be obtained. Here, a brief description will be given of the manufacturing process of the spectacle frame and the parts thereof in which the metal material and the plastic material are combined, and a plastic material such as cellulose propionate is poured into a molding die for the core of a temple such as nickel silver. After that, the metal part and the plastic part are polished, and then finish plating is performed. In this step, when the metallic white material is replaced with titanium material, the plastic material is melted and cannot be commercialized because it is treated at a temperature of 250 ° C. or higher in the finish plating step.

[0006]

SUMMARY OF THE INVENTION In view of the above, the present invention makes it possible to easily carry out finish plating of metal parts in an eyeglass frame and a part thereof in which a titanium material and a plastic material are combined, and moreover, nickel allergy. It is an object of the present invention to provide a spectacle frame and a part thereof which are made of a combination of a titanium material and a plastic material, which are lightweight and strong, and which are free from the above-mentioned problems.

[0007]

Means for Solving the Problems As a result of various studies to solve the above problems, the present inventor has performed gold or gold alloy plating as a base plating on a titanium material,
The present invention has been made by finding that the above object can be achieved.

That is, according to the present invention, the spectacle frame and at least one component thereof are made of titanium or a titanium alloy, and a part or all of the titanium or the titanium alloy is plated with gold or a gold alloy as a base plating, The present invention relates to a spectacle frame formed by combining a plastic material with titanium or a titanium alloy, which is characterized in that a plastic material is molded and then subjected to polishing and finish plating.

Further, according to the present invention, the thickness of the base plating is 1 μm.
It is characterized in that the gold alloy plating is gold / silver alloy plating or gold / copper alloy plating.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, when a spectacle frame and at least one of its parts are made of titanium material and a plastic material is molded on the titanium material to manufacture a spectacle frame and its parts, a part of titanium material or It is characterized in that the whole is subjected to gold or gold alloy undercoating, then a plastic material is molded, and a metal portion and a plastic portion are subjected to polishing processing, and final finishing plating processing is performed.

In the present invention, the undercoating of a titanium material is a gold alloy plating having a good corrosion resistance, excellent malleability and ductility and having a film thickness of 1 μm to 30 μm. Film thickness is 1 μm
If the thickness is smaller than that, there is a possibility that the titanium surface of the metal may be exposed due to abrasion in the polishing process after molding the plastic material.
On the other hand, when the film thickness is 30 μm or more, there is no particular problem in terms of quality, but it is costly and economically undesirable. The thickness of the undercoat plating is usually preferably 3 μm to 20 μm.

In the present invention, the plating solution used for the undercoating is a gold / silver alloy plating solution containing 2 to 10 g / L of gold and 5 to 20 g / L of silver, 2 to 10 g / L of gold, and 10 of copper.
A gold alloy plating solution such as a gold / copper alloy plating solution containing -60 g / L is used. Such a plating solution is, for example,
Commercially available from Victoria Co., Ltd. Further, in the present invention, it is preferable that the gold alloy plating is performed after the gold strike plating is performed before the gold alloy plating treatment. In the present invention, it is also possible to perform nickel plating as the base plating in place of the above gold alloy plating, but in this case, the characteristics of using the titanium material as the metal material are lost, so it is preferable. Absent.

In the present invention, the gold alloy base plating uses the plating solution described above, and the bath temperature is usually 20 to 60.
° C., a current density of 0.5~3A / ^dm 2, pH8~12, at conditions, in particular carried out by the following process.
That is, degreasing, activation, and gold strike plating of a titanium material are performed, heat treatment is performed at 260 ° C., gold alloy plating treatment is performed, and then water washing and drying are performed to obtain a base plating having a desired film thickness.

After subjecting the titanium material to the above gold alloy undercoating, a plastic material is molded at a desired portion. A method of molding a plastic material is, for example, to install eyeglass parts subjected to a base plating treatment in a desired mold, introduce the molten plastic material into the mold, and mold the plastic at a predetermined site. The method being carried out can be applied. Then, according to a conventional method, after polishing the metal portion and the plastic portion, finish plating is performed to obtain a spectacle frame and its components made of a combination of a titanium material and a plastic material. The finish plating is usually performed with high-quality plating such as gold plating or palladium plating.

As the plastic material used, a fibrous plastic which has been conventionally used as a material for eyeglasses is used. As such a plastic material,
For example, celluloid, cellulose acetate plastic, acetic acid /
Examples include fibrin butyrate plastic, propionate fibrin plastic, ethyl fibrin plastic, and the like.

Next, the drawings will be described. FIG. 1 is a perspective view showing an example of a spectacle frame. 2 and 3 show a temple in which a titanium material according to the present invention is used as a core material, and FIG. 2 is a perspective view of the temple in Example 1 as seen from the top surface direction,
FIG. 3 shows a perspective view of another shape of the temple in Example 2 seen from the upper surface direction, and FIG. 2 (a) shows the temple core used for the surface treatment of the present invention shown in Example 1, (b) )
Shows a temple product obtained by molding a plastic material into (a), polishing and finishing plating. FIG. 3 shows the second embodiment.
Shows the temple core used in the surface treatment of the present invention shown in,
(B) shows a temple product obtained by molding a plastic material into (a), followed by polishing and finish plating. FIG. 4 is a vertical cross-sectional view of the main part showing the state of the surface treatment of the present invention. In each figure, 1 is a temple, 2 is a lens frame, 3 is a bridge, 4 is an edge, 5 is a hinge, 6 is a blow tip, 7 is a butterfly leg,
Reference numeral 8 indicates wading, 10 indicates a titanium material, 11 indicates a base plating layer, and 12 indicates a finish plating layer. Further, 13 indicates a plastic finish portion, and 14 indicates a metal finish portion.

As described above, according to the present invention, in the spectacle frame and the parts thereof in which the titanium material and the plastic material are combined, the finish processing plating of the titanium material portion can be easily applied, and there is no fear of nickel allergy. Thus, it is possible to obtain a spectacle frame and a part thereof that are a combination of a high-quality titanium material and a plastic material that are lightweight and have high strength.

[0018]

EXAMPLES Next, examples of the present invention will be specifically described.

Example 1 A spectacle material made of pure titanium was annealed, press-formed, and rough-finished, and then the temple shown in FIG. 2 was produced. As a base plating on this temple, Ti /
Gold strike plating of 0.1 μm was performed using an Au strike plating solution, and after heating at 260 ° C. for 60 minutes, Au / Ag plating solution (Au: 4 g / L, A manufactured by Victoria Co., Ltd.)
g: 8 g / L), a bath temperature of 30 ° C., a pH of 12, and a current density of 2 A / dm ² were used to perform gold / silver alloy plating with a film thickness of 1 μm. Then, it was placed in a temple mold having a shape shown in FIG. 2, and melted cellulose propionate (CP) was injected to produce a CP composite temple having a titanium material as a core.
After polishing the metal (titanium) portion and the plastic (CP) portion of the temple, degreasing was performed and finish gold plating with a film thickness of 0.5 μm was performed according to a conventional method to obtain a product. For comparison, a CP composite temple having a titanium material as a core was prepared in the same manner as above without performing undercoating. However, the plating strength could not be obtained and the product could not be peeled off and the final plating could not be performed, and the intended product could not be obtained.

Example 2 An eyeglass material made of a titanium alloy was annealed, press-formed, and rough-finished, and then the temple shown in FIG. 3 was produced. As a base plating on this temple, Ti manufactured by Victoria Co., Ltd.
/ Au strike plating solution is used for 0.1 μm gold strike plating, and after heating at 260 ° C. for 60 minutes,
Victoria Au / Ag plating solution (Au: 5g / L, A
g: 10 g / L) at a bath temperature of 35 ° C. and a pH of 12,
Gold / silver alloy plating having a film thickness of 30 μm was applied at a current density of 2 A / dm ² . Then, it was placed in a temple die having the shape shown in FIG. 3, and melted cellulose propionate (CP) was injected to produce a CP composite temple having a titanium material as a core. After polishing the metal (titanium alloy) portion and the plastic (CP) portion of the temple, degreasing was performed, and then finish palladium plating with a film thickness of 0.5 μm was performed according to a conventional method to obtain a product. For comparison, a CP composite temple having a titanium material as a core was prepared in the same manner as above without performing undercoating. However, the plating strength could not be obtained and the product could not be peeled off and the final plating could not be performed, and the intended product could not be obtained.

[0021]

EFFECT OF THE INVENTION The spectacle frame and the parts thereof of the present invention combine the excellent characteristics of titanium such as corrosion resistance, light weight, strength and the appearance graceful characteristics exhibited by the plastic material to create a high-class feeling and fit to the face. It is possible to provide eyeglasses having remarkable effects such as excellent properties.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a spectacle frame.

2 is a perspective view of the temple of Example 1 viewed from the upper surface direction, (a) shows a temple core used for the surface treatment shown in Example 1, (b) is a plastic material molded, Shown is a temple product that has been polished and finish plated.

3 is a perspective view of the temple of Example 2 viewed from the upper surface direction, (a) shows a temple core used for the surface treatment shown in Example 2, (b) is a plastic material molded, Shown is a temple product that has been polished and finish plated.

FIG. 4 is a vertical cross-sectional view of a main part showing a state of surface treatment of the present invention.

[Explanation of symbols]

1 ... Temple 2 ... Lens frame 3 ... Bridge 4 ... 5 ... Hinge 6 ... Blow Ji 7 ... Butterfly foot 8 ... Watari 10 ... Titanium material 11 ... Base plating layer 12 ... Finish plating layer 13 ... Plastic finishing department 14 ... Metal finishing section

Claims (3)

[Claims] 1. A spectacle frame and at least one component thereof are formed of titanium or a titanium alloy, and a part or all of the titanium or titanium alloy is plated with gold or a gold alloy as a base plating, and then a plastic material is molded. A spectacle frame made of a combination of titanium or a titanium alloy and a plastic material, which is characterized by being subjected to a polishing process and a finish plating process, and a component thereof. 2. The spectacle frame and its components according to claim 1, wherein the thickness of the undercoat is 1 μm to 30 μm. 3. The spectacle frame and the component thereof according to claim 1, wherein the gold alloy plating is gold / silver alloy plating or gold / copper alloy plating.