JPH0229327A - Precious metal composite material and precious metal plate with picture or letter - Google Patents

Abstract

PURPOSE:To protect from mechanical or chemical wear, deformation and damage by laminate filming front and rear surfaces of a precious metal or precious metal alloy sheet with transdparent resin. CONSTITUTION:A sheet 1 made of a lumpy meterial of precious metal or precious metal alloy is repeatedly rolled and cut into the dimension of a little larger than a namecard, and optional diagrams, patterns, letters, portraits, approval marks or the like can be produced easily, quickly and inexpensively on the rear surface by irradiating laser beams. First prtection films 4, 4 composed of transparent resin and a little larger than the sheet 1 are coated and fexed by pressure on the front and rear surfaces of the pprecious metal sheet 1, and a precious metal composite material 5 is fomred by bonding each of the edges of said films. As the front and rear surfaces of the precious metal sheet 1 are coated and reinforced with protection film 4, the precious metal composite material 5 made of thinly stretched gold of several grams can be protected from being deforme or damaged.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to precious metals such as gold, silver, and platinum, which can be easily used as souvenirs and gifts, and which also have decorative value. Regarding precious metal composite materials and precious metal composite plates with pictographs, mainly consisting of.

[Prior Art] Conventionally, small gold ingots have been given patterns on their surfaces by being engraved using a mold, similar to those seen on coins and medals.

Incidentally, in recent years, as gold has become more popular, the units in which it is handled have become smaller and it has come to be bought and sold in duram units. However, when such small amounts of gold are press-molded into coins or medals with a certain thickness, their shapes are very small and unattractive, making them less effective as souvenirs or gifts. There was a problem.

Therefore, it is conceivable to roll a gold ingot into a thin plate, and then mark the surface of the plate by stamping or other means to add patterns or letters depending on the purpose.

In this case, for example, if 1g of gold is rolled out to a thickness of 20μ, it will be about the size of a business card and will look very attractive.
It is suitable for souvenirs because the patterns and letters are easy to distinguish.

[Problem M to be solved by the invention] However, in C1 of the above-mentioned conventional technology,
Since it is made of a very thin plate, it has low strength and is easily deformed or damaged, making it inconvenient to handle. In addition, the content of the markings mentioned above will differ depending on the purpose of the item being used as a souvenir or gift, and therefore it will be necessary to change it depending on each individual order. However, the company was not able to accommodate such orders, and the small loft meant that the cost would be high. Therefore, it is conceivable to create a composite decorative board in which, for example, a noble metal thin plate and a transparent decorative board such as an acrylic board with a pattern are overlaid and integrated.

In this way, the above object can be achieved at low cost by mass producing the precious metal thin plates and diversifying the characters and designs on the decorative plates. However, since the precious metal thin plate itself is very difficult to handle, there are problems in that the process of manufacturing the composite decorative plate is difficult and the finished product is not good. Furthermore, when the thickness of the precious metal thin plate falls below a certain value, the thin plate becomes translucent.
The pattern becomes transparent, reducing the decorative function and reducing the product value.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the noble metal composite material according to claim 1 of the present invention is provided by protecting the front and back surfaces of a thin plate made of a noble metal or an alloy of noble metals with a transparent resin. It is laminated and coated with a membrane, thereby making the precious metal thin plate into an easy-to-handle unit. The material, quality, weight, etc. of the precious metal may be marked on the surface of the thin plate of the precious metal by engraving or laser marking. The protective film may be marked with pictograms or the like as described above by printing or copying, but it may be left completely plain as the material of the precious metal composite plate with pictographs according to claim 2. The manufacturing method for this precious metal composite is as follows:
A thin precious metal plate is rolled into a coil sheet, and this is covered with a laminate to create a band-shaped composite plate material. Then, by punching or the like, composite materials of appropriate shapes and sizes can be manufactured in large quantities and at low cost.

Further, the precious metal composite plate with pictographs according to claim 2 is obtained by overlapping the above-mentioned precious metal composite material and a transparent decorative plate with partially opaque pictographs, and covering both with a protective film made of transparent resin. be. The pictograms on the transparent decorative board are made by color copying, etc., which allows production of other types and quantities. It is desirable that these steps be performed in a clean room.

Furthermore, when a transparent decorative plate is placed on only one side of the noble metal thin plate, the other surface of the noble metal thin plate may be marked with a laser beam or the like so that it can be seen from the other side.

[Function] In the precious metal composite material of claim 1, the precious metal thin plate is covered with a protective film to be reinforced and protected from mechanical and chemical wear and tear. It is possible to prevent deformation and damage, and it is possible to provide an attractive decorative item with a relatively large area (about the size of a business card, postcard, A4 paper), and it is easy to handle, carry, and store. It is easy to make, and furthermore, various decorative items can be easily manufactured using this material.

In the precious metal composite plate with pictographs according to claim 2, by overlapping the thin precious metal plate with the transparent decorative plate on which partially opaque pictographs are applied, the pictographs on the decorative plate look like precious metals when viewed from the side of the decorative plate. It appears to stand out against the color of the background. If the decorative plate is only one side of the precious metal thin plate,
When viewed from the opposite side, the markings on the precious metal sheet are visible, resulting in a precious metal composite sheet that has pictographs with different tones and contrasts on both sides of the sheet.

Since the noble metal thin plate is covered with a protective film, the light transmittance of the noble metal thin plate is offset by the refraction of light at the plane between the protective film and the noble metal thin plate. Therefore, when viewed from the noble metal thin plate side, the color tone of the precious metal is not reduced and the pattern of the decorative plate is prevented from being seen through.

Since the transparent decorative plate reinforces the precious metal thin plate, it is difficult to deform even when an external force is applied, making it easy to handle and store.

Since the decorative plate and the precious metal thin plate are coated with a protective film, dirt adhesion, abrasion, corrosion, etc. are prevented. Furthermore, variable production of a wide variety of products can be easily performed.

[Example code] Hereinafter, the present invention will be described in detail with reference to the drawings.

(Embodiment corresponding to claim 1) Figures 1 to 3 show a first embodiment, and in these figures, the symbol ■ indicates a thin gold plate. This thin plate I is made by repeatedly rolling a block material with a purity of 99.99% or more to a thickness of 1
It is finished to 5 μm and cut to the size of a business card, and the back side is irradiated with a laser beam from a YAG (Yttrium-Aluminum-Garnet) laser generator to create letters 2 indicating the material, quality, and weight. There is.

In this process, as a means for moving the laser beam, a well-known method is adopted in which a generator is controlled 7 to change the irradiation position of the laser beam within the X-Y axis plane. By changing the intensity of the laser beam, the depth of the unevenness forming the pattern can be adjusted as appropriate.
For example, if this is kept to about 1000 mm of the thickness of the plate, problems such as the thin plate I itself being transparent and the patterns on the front and back overlapping will not occur. Also, since the mold is not crimped,
Irregularities on the front will not appear on the back. In this method, by combining a device that moves a laser beam with an appropriate graphic input device, any figure, pattern, character, etc.
To easily and quickly add portraits, certification marks, etc. to thin plates, and to do so at low cost.

The content displayed on the thin precious metal plate 1 is not particularly limited, but when used as a wedding gift, the family crests 3 of both families may be applied in addition to the above characters 2.

In addition, it is a precious metal thin plate! The shape is not limited to a rectangle, and its material may be silver, platinum, or an alloy thereof.

As shown in FIG. 2, the front and back surfaces of the noble metal thin plate 1 are made of transparent resin and are slightly larger than the thin plate 1 (
The vertical and horizontal dimensions are approximately 1 on one side! x long) ・First protective film 4
. As shown in FIG. 3, this first protective film 4 has a two-layer structure, and the outer layer (thickness = 100 μm) 4a is made of PET (polyethylene terephthalate), which has high mechanical strength among thermoplastic resins. The inner layer (thickness: 250 μm) 4b, which is in contact with the precious metal thin plate (1), is made of a thermoplastic ionomer resin (Surlyn resin: trade name) that can be pressure-bonded to the gold surface at a relatively low temperature. When the first protective film 4 has such a two-layer structure, the noble metal thin plate 1 can be easily coated at a relatively low temperature while preventing the protective film 4 from changing its shape.

In the noble metal composite material 5 having such a structure, the front and back surfaces of the precious metal thin plate 1 are covered and reinforced with the protective film 4, so even if several grams of gold is stretched thin, it will not be deformed or damaged. It is possible to provide an attractive decorative item with a relatively large area (about the size of a business card). Moreover, it is easy to handle, carry, and store easily.

FIG. 4 shows a second embodiment. In the noble metal composite material 7 shown in this figure, a first protective film 8.8 having the same shape and the same area as the thin plate l and having a two-layer structure similar to the first protective film 4 is crimped onto the front and back surfaces of a thin noble metal plate l. It is ours. Such a noble metal composite material 7 can of course obtain the same effects as the above-mentioned noble metal composite material 5, but also has the advantage of being advantageous in mass production.

That is, in order to mass-produce this precious metal composite material 7, as shown in FIG. A pair of rolls 13.13 around which a two-layered band-shaped resin 12 made of Surlyn resin is wound.
A belt-shaped resin I2 is unrolled from the
4. i4 and then feed them from the preheating roll 14.14 to the pressure roll 15.1.5. This pressure roll l5,15 is about 100~! It is heated to 50°C, and the pressure roll 15.15 forms a band-shaped resin 12.12.
is heated and pressed onto the front and back surfaces of the strip-shaped gold lO, thereby forming a thin composite strip 16 having a three-layer structure. Then, as shown in FIG. 6, the thin composite band I6
The precious metal composite material 7 is mass-produced by punching business card-sized pieces one after another at predetermined intervals in the length direction from the center part in the width direction.

In this example, the edge portions are trimmed, and when this is laminated with a transparent decorative plate as described later, the advantage is that the edge portions are simple and have a high decorative effect. Of course, since it is crimped with Surlyn resin, it will not peel off easily.

(Example corresponding to claim 2) FIGS. 7 to 10 show a third embodiment.

The noble metal composite plate with pictographs shown in these figures is obtained by superimposing a transparent decorative plate 20 on the surface of the noble metal composite material 5, and covering this with a second protective film 21 made of a transparent resin.

As shown in FIG. 9, the transparent decorative board 20 is a transparent board made of a material such as resin such as acrylic or glass, with pictographs 22 made of opaque parts applied to the surface of the board. The material of the transparent decorative plate 20 does not necessarily have to be highly rigid, and may be appropriately flexible, and its thickness is set appropriately. Further, the above-mentioned opaque portion may be formed by an appropriate method such as coating with paint, one-leaf engraving, etching, or a combination of these methods. Furthermore, if the opaque part is used as the pictogram 22 part,
It may also be used as a background part of the emoji. The part of the pictogram may be cut out to expose the precious metal in that part. The content of the pictograms 22 displayed on the transparent decorative board 20 is not particularly limited, but for example, in the case of wedding gifts, different displays are displayed for each product, such as the names of the bride and groom, and other This could be a business card, a commemoration of an event, or a reproduction of a famous painting or design. A relatively easy and specific method is to use a copy machine, and thermal copying, laser copying, photocopying, etc. can easily make clear color copies based on any original plate.

Further, as shown in FIG. 10, the second protective film 21 is
It has a three-layer structure, with the outer layer (thickness: 1Oj11) 21
a is an acrylic resin with high surface hardness, an intermediate layer (thickness 50μ
m) 21b is PET (polyethylene terephthalate), which has a high mechanical strength among thermoplastic resins, and the inner layer (thickness: 50 μm) 21c can be bonded to the surface of the transparent decorative plate 20 and the noble metal composite material 5 at a relatively low temperature. It is made of Surlyn resin, a thermoplastic resin that can be used. When the second protective film 21 has such a three-layer structure, the shape of the protective film 21 can be prevented from changing and it can be coated easily at a relatively low temperature. ), it is possible to maintain translucency for a long period of time even if scratches etc. occur.

The precious metal composite plate with pictographs having the above configuration is made of precious metal composite material 5
However, since it is reinforced by the transparent decorative plate 20, damage or bending during transportation or manual transfer is prevented, and the product value is not impaired. In addition, the whole is laminated with a second protective film 21 1, so that the precious metal thin plate 1 and the transparent decorative plate 20 do not move relative to each other, and the precious metal thin plate F; L1 is not damaged or wrinkled, and dirt does not adhere to it. Prevented. Furthermore, since the noble metal thin plate 1 is covered with the first protective film 4, the light transmittance of the noble metal thin plate 1 is offset by the refraction of light at the surface between the protective film 4 and the noble metal thin plate 1, and the side of the noble metal thin plate 1 is When viewed from above, the color tone of the precious metal thin plate 1 is not degraded, and the pictograph 22 attached to the transparent decorative plate 20 on the front side is not seen through.

In addition, in the third embodiment, the transparent decorative plate 20 was superimposed on the precious metal composite material 5 of the first embodiment to form a precious metal composite plate with pictographs, but the transparent decorative plate was formed on the thin precious metal composite material 7 of the second embodiment. If the plates 20 are formed by overlapping each other, mass production can be easily performed.

FIGS. 1I to 12 show a fourth embodiment. The precious metal composite plate with pictographs shown in these figures has a precious metal composite plate 5 sandwiched between a pair of transparent decorative plates 20a and 20b, which are integrally covered with a second protective film 21. The structure is as follows. In this case, the content displayed on the precious metal thin plate l is the transparent decorative plate 20a, 20b.
There is little need to mark the precious metal thin plate l. There is no particular difference in the material and display of the transparent decorative plates 20a and 20b from those described above.

This embodiment further enhances the decorative/display effect and reinforcing effect of the transparent decorative plate 20 described above, and has the advantage that it can be used even when the precious metal thin plate 1 becomes even thinner. It is something that you have.

In addition, in both the third and fourth embodiments, the inner precious metal composite materials 5 and 7 can be reused as many times as they like, so they can be used together with transparent decorative plates with other designs. They can be reused in combination, and if the purity of the gold is guaranteed, they can also be converted into cash.

[Effects of the Invention] As detailed above, according to the noble metal composite material of claim 1 of the present invention, the thin noble metal plate is covered and reinforced by the first protective film, and is protected from mechanical and chemical wear. Therefore, even if a few grams of gold is rolled out thinly, its deformation,
Can prevent damage and has a relatively large area (about the size of a business card)
We can provide decorative items that look great. Moreover, it is easy to handle, carry, and store easily.

According to the precious metal composite plate with pictographs of claim 2, it is reinforced with the precious metal composite material or the transparent decorative plate, so that
This prevents damage or bending during transportation or manual transfer, and the product value is not compromised.Also, since the entire structure is laminated with a second protective film, precious metal thin sheets can be There is no relative movement between the transparent decorative plate and the thin precious metal plate, so there is no damage or wrinkles to the thin precious metal plate, and the adhesion of dirt is also prevented.
Since it is covered with a protective film, the light refraction at the surface between the first protective film and the precious metal thin plate cancels out the translucency of the precious metal thin plate, reducing the color tone of the precious metal thin plate when viewed from the side of the precious metal thin plate. Moreover, the pictograms attached to the transparent decorative plate on the front side are no longer visible through them. Therefore, the product has excellent decorative properties and a long service life.
It has excellent effects such as being able to maintain product value for a long period of time.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a plan view of a thin precious metal plate, and FIG. 2 is a perspective view showing a state in which the thin noble metal plate is covered with a first protective film. 3 is a sectional view of the first protective film, FIGS. 4 to 6 show the second embodiment, FIG. 4 is a perspective view of the noble metal composite material, and FIG.
The figure is an explanatory diagram for explaining the method of manufacturing a precious metal composite material, Figure 6 is a plan view of a thin composite strip, and Figures 7 to 10 are
The figures show the third embodiment, so Fig. 7 is a perspective view of the precious metal composite plate with pictographs, Fig. 8 is a sectional view of the same, Fig. 9 is a plan view of the transparent decorative plate, and Fig. 10 is the second protection plate. Cross-sectional view of membrane, 11th
13 to 13 show a fourth embodiment, and FIG. 12 and FIG. 12 are perspective views showing the manufacturing process of a precious metal composite plate with pictographs, and FIG. 13 is a sectional view thereof. l...Precious metal thin plate, 4,8...First protective film, 5.7...Precious metal composite material, 20.20a, 20b...Transparent decoration Board, 21・
...Emoji, 21...Second protective film.

Claims (2)

[Claims] (1) A noble metal composite material characterized in that the front and back surfaces of a thin plate made of a noble metal or an alloy of noble metals are laminated and coated with a protective film made of a transparent resin. (2) A precious metal composite with pictographs, characterized in that the precious metal composite material of claim 1 and a transparent decorative plate with partially opaque pictographs are overlapped, and both are covered with a protective film made of transparent resin. Board.