JPH11235781A - Noble metal composite plate and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a noble metal composite plate which may have little manufacturing steps and little number of components. SOLUTION: The noble metal composite plate comprises a thin plate 1 made of a noble metal or noble metal alloy, and a transparent decorative reinforcing material 4 having a pattern 22 made of a partly opaque portion for covering at least one surface of front and rear surfaces of the plate 1 to reinforce the plate 1. The plate 1 is obtained by repeatedly rolling a lump raw material of gold having a purity of 99. 99% or more to finish its thickness to, for example, 15 μm, and cutting it in a calling card size. And, as the thickness of the plate 1, a range of about 3 to 100 μm is suitable. A raw material of the material 4 is, for example, a hard coated laminate film made of an acrylic resin or glass fiber-filled resin having an excellent wear resistance and a scratch resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly based on precious metals such as gold, silver and platinum which can be easily used as souvenirs, gifts and members' cards and have a decorative value. Noble metal composite board.

[0002]

2. Description of the Related Art Heretofore, small gold nuggets have been provided with a pattern on the surface by engraving using a die as seen in coins and medals. By the way, in recent years, the popularization of gold has progressed, and the handling unit of gold has been reduced, and trading in gram units has been started.

[0003] However, such a small amount of gold pressed as a coin or medal in a state of having a certain thickness has a very small shape, so that it does not look good, and souvenirs, gifts and membership cards. However, there was a drawback that the effect was thin.

[0004] Therefore, it is conceivable to roll the gold nugget into a thin plate shape, apply markings on the surface of the gold nugget by engraving or the like, and add a pattern or character according to the purpose. In this case, for example, if 1 g of gold is extended to a thickness of 20 μm, the size becomes about the size of a business card and the appearance is sufficiently high, and the patterns and characters are easily distinguished, which is suitable for souvenirs.

[0005] However, in the conventional technique as described above, since a very thin plate is used as a material,
There is a problem that the strength is small, the shape is easily deformed or broken, and therefore, handling is inconvenient.

Japanese Patent Publication No. 5-39787 discloses a noble metal composite material in which the front and back surfaces of a thin plate made of a noble metal or a noble metal alloy are coated with a first protective film made of a transparent resin. There has been proposed a technique of a noble metal composite plate in which a transparent decorative plate having an opaque pictogram is superimposed and both are covered with a second protective film made of a transparent resin.

According to this technique, the precious metal thin plate is covered and reinforced by the first protective film, and is protected from mechanical and chemical wear. Damage can be prevented, and a decorative product with a relatively large area that looks good can be provided. Also, since the whole is laminated and coated with the second protective film, the precious metal thin plate and the transparent decorative plate can move relative to each other. Therefore, there is an effect that the noble metal sheet is not damaged or wrinkled, and the adhesion of dirt is prevented.

[0008]

As described above, the noble metal composite plate is prepared by laminating a noble metal thin plate to produce a noble metal composite material, and separately producing a transparent decorative plate to form the noble metal composite material. It is manufactured through a process of laminating the transparent decorative plate in an overlapping state. Therefore, there is a problem that the number of steps is large and the number of parts is large, so that the cost is increased. In particular, in the case of mass distribution as souvenirs or the like, it has been desired to use something cheaper than the conventional one.

The present invention has been made in view of the above problems, and has as its object to provide a noble metal composite plate which requires a small number of manufacturing steps and a small number of parts, and a method of manufacturing the same.

[0010]

The present invention has the following features to attain the object mentioned above. That is, in the noble metal composite plate according to the first aspect, a thin plate made of a noble metal or an alloy of a noble metal and a function of covering at least one of the front and back surfaces of the thin plate to reinforce the thin plate are partially opaque. A technique including a transparent decorative reinforcing material provided with a pattern consisting of various parts is employed.

In this noble metal composite plate, since the thin plate is directly covered with a transparent decorative reinforcing material which has been previously patterned, the number of manufacturing steps is smaller than that of the conventional example. And the number of parts is small. Therefore, a low-cost precious metal composite plate can be realized.
That is, a transparent decorative plate is separately manufactured, or the transparent decorative plate is overlapped while being positioned with the noble metal composite material, and further, the steps of laminating the transparent decorative plates are not required.

In the method for manufacturing a noble metal composite plate according to the second aspect, at least one of the front and back surfaces of the thin plate made of a noble metal or a noble metal alloy is provided with a transparent decoration in which a pattern composed of a partially opaque portion is provided. A method for manufacturing a noble metal composite plate formed by reinforcing the thin plate by coating with a material, comprising: a thin body forming step of forming a strip-shaped thin body made of a noble metal or an alloy of a noble metal; A transparent decorative body forming step of forming a band-shaped transparent decorative body formed by applying a pattern composed of partially opaque portions at predetermined intervals, and a state in which the band-shaped thin body and the band-shaped transparent decorative body are sequentially stacked. A thin-walled composite forming step of pressing both to form a strip-shaped thin-walled composite, and a thin-walled composite cutting step of cutting the strip-shaped thin-walled composite at predetermined intervals to produce a plurality of noble metal composite plates. Be prepared Techniques are employed.

In this method of manufacturing a noble metal composite plate, a thin body forming step of forming a strip-shaped thin body made of a noble metal or an alloy of a noble metal, and a pattern consisting of a partially opaque portion in a transparent strip-shaped resin are formed at predetermined intervals. A transparent decorative body forming step of forming a strip-shaped transparent decorative body that is applied every other time, and pressing the both in a state in which the strip-shaped thin body and the belt-shaped transparent decorative body are sequentially stacked to form a band-shaped thin composite. A thin-walled composite forming step of forming, and a thin-walled composite cutting step of cutting the strip-shaped thin-walled composite at predetermined intervals to produce a plurality of noble metal composite plates; Compared with the manufacturing method, the number of steps can be reduced, and the manufacturing cost can be reduced.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a noble metal composite plate according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the precious metal composite plate 5 of the present embodiment has a thin plate 1 made of gold and a function of covering the front and back surfaces of the thin plate 1 to reinforce the thin plate 1. And the applied transparent decorative reinforcing material 4.

The thin plate 1 is obtained by repeatedly rolling a lump of gold having a purity of 99.99% or more, finishing the thickness to 15 μm, for example, and cutting it into a business card size. The thickness of the thin plate 1 is preferably in the range of about 3 to 100 μm.

The shape of the precious metal thin plate 1 is not limited to a rectangle, but may be made of any suitable material such as silver, platinum or the like, or an alloy thereof, in addition to gold.

As shown in FIG. 2, a transparent decorative reinforcing material 4 made of a transparent resin and slightly larger than the thin plate 1 is coated on both the front and back surfaces of the thin precious metal plate 1 and pressure-bonded. By bonding, the noble metal composite plate 5 is formed.

As shown in FIG. 3, the transparent decorative reinforcing material 4
A pictorial character 22 consisting of an opaque part is applied to the surface of a transparent plate. The material of the transparent decoration reinforcing material 4 is, for example, a hard coat laminate film made of an acrylic resin or a resin containing glass fiber, and has excellent wear resistance and scratch resistance. This makes it difficult for scratches and the like to be made, and can maintain the translucency for a long period of time.

The opaque portion 22 of the transparent decorative reinforcing material 4 is printed directly on the transparent decorative reinforcing material 4 by various printing methods, for example, an offset printing method, a silk printing method, a gravure printing method, or the like. And for this printing, U
V ink is used. UV ink is a type of light-curing ink, which is used when printing directly on plastic resin.
It has excellent ink tightness, drying properties and abrasion resistance.
The thickness of this printing is, for example, about 3 to 4 μm.

In addition to the printing method, there is a method using a copy machine. According to heat copying, laser copying, photographic copying, etc., a clear color copy can be easily made based on an arbitrary original plate. In addition to the application of the paint such as printing and copying, an appropriate method such as relief engraving and etching and a method combining these methods may be used. Further, the opaque portion may be the portion of the pictogram 22 or the background of the pictogram, or the portion of the pictogram may be cut out to expose the noble metal in that portion.

Pictogram 2 to be displayed on this transparent decorative reinforcing material 4
The contents of item 2 are not particularly limited. For example, in the case of a wedding present, a different display such as the name of the bride and groom is displayed for each product, and other business cards, commemoration of the event, famous paintings, etc. Or duplication of designs.

In this noble metal composite plate 5, the thin plate 1 is
Since it is configured to be directly covered with the transparent decorative reinforcing material 4, the number of manufacturing steps and the number of parts can be reduced as compared with the conventional example. Therefore, a low-cost noble metal composite plate 5 can be realized. That is, in the present embodiment, as compared with the conventional example, there is no need to position the transparent decorative plate with respect to the noble metal composite material in which the noble metal sheet is covered with the first protective film. Since there is no need to cover the composite material and the transparent decorative plate with the second protective film, the number of manufacturing steps and the number of components can be significantly reduced.

Next, a method of manufacturing the noble metal composite plate 5 will be described with reference to FIG.

First, a strip-shaped thin body 10 made of gold and having a thickness of 15 μm is formed in advance (thin body forming step).
A strip-shaped transparent decorative body 12 is formed by applying the pictograms composed of partially opaque portions at predetermined intervals on the transparent strip-shaped hard coat laminate film (transparent decorative body forming step).

The strip-shaped thin body 10 is unwound from the roll 11 on which the strip-shaped thin body 10 is wound, and a pair of rolls 13, 1 around which the strip-shaped transparent decorative body 12 is wound.
3, the belt-shaped transparent decorative body 12 is unwound, and these are preheated by preheating rolls 14, and are further fed from the preheating rolls 14, 14 to pressure bonding rolls 15, 15.

The pressure rolls 15, 15 are kept at about 100 ° C.
To 150 ° C., and the pressure rolls 15, 15
As a result, the strip-shaped transparent decorative body 12 is heated and pressed onto the front and back surfaces of the strip-shaped thin body 10, respectively.
A noble metal composite plate strip (thin composite) 16 having a three-layer structure is formed (thin composite formation step).

Then, as shown in FIG. 5, it is possible to mass-produce the noble metal composite plate 5 by punching out the center of the noble metal composite plate strip 16 in the width direction one after another at predetermined intervals in a business card size. Yes (thin composite cutting step).

In the method of manufacturing the noble metal composite plate 5, the number of steps is reduced and the manufacturing cost can be reduced as compared with the manufacturing method described in the above-mentioned conventional publication.

In the noble metal composite plate 5 having the above structure, the noble metal thin plate 1 is reinforced by the transparent decorative reinforcing material 4, so that a situation in which the noble metal plate 1 is damaged or bent at the time of transportation or manual transfer is prevented. , The commercial value is not lost. At the same time, the noble metal sheet 1 is
, The noble metal sheet 1 is not damaged or wrinkled, and the adhesion of dirt is prevented.

Further, the refraction of light on the surface between the transparent decorative reinforcing material 4 and the noble metal sheet 1 cancels out the translucency of the noble metal sheet 1, and when viewed from the noble metal sheet 1 side, the color tone of the noble metal sheet 1 is changed. The pictogram 22 attached to the transparent decorative reinforcing material 4 on the front side will not be seen through without being dropped.

Next, a second embodiment will be described with reference to FIG.

In the present embodiment, the material of the transparent decorative reinforcing material 4 is a four-layered material described below in place of the hard coat laminate film.

That is, the transparent decorative reinforcing material 4 of the present embodiment
Are a thermoplastic layer 41 (20 to 50 μm in thickness), a polyethylene (PE) layer 42 (0 to 50 μm), and a polyethylene terephthalate (PET) layer 43 (20 to 100 μm) in order from the one located closest to the noble metal sheet 1.
m), the hard coat laminated film layer 44 (1-1
0 μm).

The thermoplastic layer 41 can be pressed against the surface of gold at a relatively low temperature.
For example, ethylene ethyl acrylate copolymer resin (EEA
Resin) or ionomer (Surlyn resin: trade name). These are usually used in combination with polyethylene from the standpoint of improving the bonding property with polyethylene terephthalate and economical efficiency, and generally have a thickness of about 50 μm as an adhesive layer (polyethylene + ionomer). The polyethylene terephthalate layer 43 has high mechanical strength and excellent heat resistance and scratch resistance. And the first
As in the embodiment, the hard coat laminate film layer 44 is directly printed with UV ink.

As described above, in the second embodiment,
By making the material of the transparent decoration reinforcing material 4 into the above four layers,
As compared with the first embodiment, an effect that the adhesiveness to a noble metal and the permeability are excellent can be obtained.

In the first and second embodiments, the hard coat laminate film is printed with UV ink. However, the present invention is not limited to this, and printing is performed with ordinary ink. May be.
In the case of ordinary ink, printing is likely to fall off. Therefore, as shown in FIG. 7, a polyethylene film (thickness: 10 to 100 μm) 30 may be adhered after printing characters 22 or the like. In this case, the reinforcing effect of the precious metal thin plate 1 is improved by the film 30, so that the film 25 having a lower hardness than the hard coat laminate film is sufficient instead of the hard coat laminate film.

[0038]

According to the precious metal composite plate of the first aspect,
Since the thin plate is directly covered with the transparent decorative reinforcing material, the number of manufacturing steps and the number of parts can be reduced as compared with the conventional example. Therefore, a low-cost precious metal composite plate can be realized. That is, a transparent decorative plate is separately manufactured, or the transparent decorative plate is overlapped while being positioned with the noble metal composite material, and further, the steps of laminating the transparent decorative plates are not required.

According to the method for manufacturing a noble metal composite plate of the present invention, a thin body forming step of forming a strip-shaped thin body made of a noble metal or an alloy of a noble metal; A transparent decorative body forming step of forming a band-shaped transparent decorative body formed by applying a pattern consisting of at predetermined intervals, and press-bonding both in a state in which the band-shaped thin body and the band-shaped transparent decorative body are sequentially stacked. A thin-walled composite forming step of forming a strip-shaped thin-walled composite, and a thin-walled composite cutting step of cutting the strip-shaped thin-walled composite at predetermined intervals to produce a plurality of noble metal composite plates, Compared to the manufacturing method described in the above-mentioned conventional publication, the number of steps is reduced, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view showing a first embodiment of a noble metal composite plate according to the present invention.

FIG. 2 is a perspective view showing a state in which a thin precious metal plate is covered with a transparent decorative reinforcing material in the first embodiment.

FIG. 3 is a plan view showing a transparent decorative reinforcing material according to the first embodiment.

FIG. 4 is a side view showing a method for manufacturing a noble metal composite plate according to the first embodiment.

FIG. 5 is a plan view showing a noble metal composite plate strip according to the first embodiment.

FIG. 6 is an enlarged sectional view showing a second embodiment of the noble metal composite plate according to the present invention.

FIG. 7 is an enlarged sectional view showing a modification of the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thin plate 4 Transparent decoration reinforcing material 5 Precious metal composite plate 10 Strip-shaped thin body 12 Strip-shaped transparent decorative body 16 Thin composite body

Claims (2)

[Claims] 1. A transparent decoration provided with a pattern comprising a thin plate made of a noble metal or an alloy of a noble metal, and a partially opaque portion which covers at least one of the front and back surfaces of the thin plate to reinforce the thin plate. A noble metal composite plate comprising a reinforcing material. 2. A thin plate made of a noble metal or an alloy of a noble metal, at least one of the front and back surfaces of which is covered with a transparent decorative material provided with a pattern of a partially opaque portion to reinforce the thin plate. A thin-walled body forming step of forming a strip-shaped thin body made of a noble metal or an alloy of a noble metal, and a pattern formed of a partially opaque portion in a transparent strip-shaped resin at a predetermined interval. A transparent decorative body forming step of forming a band-shaped transparent decorative body that is applied every other time, and a band-shaped thin-walled composite formed by pressing the strip-shaped thin body and the belt-shaped transparent decorative body in a state of being sequentially overlapped with each other. A thin-walled complex forming step of forming; and a thin-walled composite cutting step of cutting the strip-shaped thin-walled composite at predetermined intervals to produce a plurality of noble metal composite boards. How to make .