JP2001105797A - Decorative product with metal pattern and manufacturing method of the decorative product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the high grade feeling similar to that of traditional inlaid works and simply and efficiently form a metal pattern of bonding properties more than those of the inlaid works heretofore available. SOLUTION: A decorative product 1 with a metal pattern is formed of a base material 2 of high melting point on which a powdery metal of low melting point is welded, and a welded section thus formed is formed into a metal pattern 4, and the surface of the metal pattern 4 is formed into recesses and projections. Also another decorative product with a metal pattern is provided with recesses on a base material of high melting point, and the powdery metal of low melting point is welded on the recesses and embedded therein, and embedded sections thus formed or sections, whereon protruded sections and the embedded sections of the base material formed in the recesses are integrated together, are formed as the metal pattern. The above decorative product 1 is manufactured in a manufacturing method consisting of a pattern forming process for making a binder adhered on the base material of high melting point, a powdery lacquering process for lacquering the metal powder on the binder, a precipitating process for precipitating the lacquered metal powder into the binder and a burning process for burning the base material 2 in the state that the metal powder is precipitated in the binder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative article having a metal pattern formed by attaching a metal to metal or ceramics, and a method for manufacturing the decorative article.

[0002]

2. Description of the Related Art As an ancient technique, a technique or a work called an inlay is known. This inlay is metal,
It refers to the technique of engraving a pattern on a material such as wood, ceramics and the like, and embedding other materials, especially gold, silver, bronze, etc., or a work using the technique. Such an inlay has a luxurious pattern made of gold and silver or the like, and gives a sense of quality.

On the other hand, as a simple technique for forming a pattern by attaching another metal material to a metal serving as a base material,
I. Partial plating method in which plating is partially applied after masking, b. A printing technique for printing a pattern portion, c. A method of separately producing a pattern portion and then welding, brazing, or bonding it to a metal base material with an adhesive is known.

[0004]

When a metal pattern is formed on a metal member by an inlaid technique that has been used since ancient times, work efficiency is low and cost is high. Further, the inlaid technique requires a high level of technology, and very few technicians have acquired the inlaid technique. Furthermore, there are few successors trying to acquire the inlaid technique, and stable and mass production cannot be performed in the future.

[0005] The above-mentioned various simple techniques for applying a metal pattern to a metal base material are certainly simpler than inlays, can reduce manufacturing costs, and enable stable and mass production. However, in plating and printing techniques, 20 μm
It is difficult to obtain the above thickness, and it is difficult to obtain a three-dimensional effect. Further, conventional plating techniques, welding techniques, bonding techniques, and the like have poor adhesion and are inferior in durability.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a metal pattern having the same high-quality feeling as an old inlaid and having an adhesion more than that of the conventional inlaid, easily and efficiently. An object of the present invention is to provide a decorative article with a formed metal pattern. Another object of the present invention is to provide a decorative article with a metal pattern in which a so-called watermark pattern is formed on a base metal. further,
Other inventions eliminate the need for advanced skills, provide a sense of quality similar to ancient inlays, have more adhesiveness than before, easily and efficiently form a metal pattern on a base material, An object of the present invention is to provide a method for manufacturing a decorative article with a metal pattern that can form a watermark pattern.

[0007]

In order to achieve the above object, a decorative article with a metal pattern according to the present invention is characterized in that a powdery metal having a low melting point is welded to a base material having a high melting point. The surface of the metal pattern is formed to be uneven.

Therefore, the metal can be reliably welded to the base material. By increasing the thickness of the welded portion, it is possible to easily and efficiently form a metal pattern having a three-dimensional effect similar to that of an ancient inlay with good adhesion. In addition, the irregularities on the surface of the metal pattern increase the texture and the luxury.

[0009] Still another aspect of the present invention is the above-described invention.
The base material is made of metal, the powdered metal is a different metal different from the base material, and the irregularities are formed by exposing a part of the powder of the different metal to the surface.

[0010] For this reason, a metal pattern can be formed on the metal material, and a high-quality metallic ornament can be obtained.
In addition, since irregularities on the surface of the metal pattern are formed by a part of the metal powder to be welded, a special irregularity forming operation is not required.

[0011] Further, the decorative article with a metal pattern according to another invention includes:
A concave portion is provided in a base material having a high melting point, a powdery metal having a low melting point is welded and embedded in the concave portion, and the embedded portion is integrated with the projecting portion of the base material formed in the concave portion and the embedded portion. The part that has been made is a metal pattern.

Therefore, the metal is welded and embedded in the concave portion of the base material. As a result, it is possible to obtain a decorative article in which a metal pattern having the same high-class feeling as that of an ancient inlaid and having an adhesiveness higher than that of a conventional inlaid is simply and efficiently formed.

[0013] Further, the decorative article with a metal pattern according to another invention includes:
An alloyed portion with a foreign metal having a low melting point is formed on the surface of the base metal having a high melting point, and this alloyed portion is formed as a metal pattern. Therefore, it is possible to easily and efficiently obtain a decorative article having a so-called watermark pattern formed on a metal surface. Moreover, since the alloyed portion becomes a watermark pattern, the pattern cannot be easily peeled off.

Further, in the decorative article with a metal pattern according to another invention, a trace of a powdered foreign metal having a low melting point is formed on the surface of a base metal having a high melting point, and the trace is used as a metal pattern. Therefore, it is possible to easily and efficiently obtain a decorative article having a so-called watermark pattern formed on a metal surface. In addition, since the trace of the dissimilar metal welded becomes a watermark pattern, the pattern cannot be easily peeled off.

[0015] Further, the decorative article with a metal pattern according to another invention includes:
A first layer in which a powdered metal having a low melting point is welded to a base material having a high melting point, and a second layer obtained by dissolving a metal piece or a metal foil having a low melting point is formed on the first layer. And a part where both layers are provided has a metal pattern. As a result, it is possible to form a metal pattern which is flat and has no irregularities and which is strongly fixed to the base material. Further, by combining the metal pattern with the uneven surface, it is possible to give the metal pattern a three-dimensional effect and to improve the taste.

Further, in the method for producing a decorative article with a metal pattern according to the present invention, a step of welding a foreign metal having a low melting point to a base metal having a high melting point, and removing at least a part of the welded foreign metal to remove the base metal Making the surface and the welded portion coplanar, wherein the trace of the welded foreign metal removed or the remaining foreign metal portion is formed as a metal pattern.

[0017] Therefore, since the foreign metal is firmly welded to the base material, when at least a part of the welded foreign metal is removed and flattened, the trace and the remaining foreign metal are firmly left. As a result, it is possible to easily and efficiently form a watermark pattern or an embedded pattern that does not peel off on a metal material.

Further, the method of manufacturing a decorative article with a metal pattern according to another invention includes a pattern forming step of adhering a binder to a base material having a high melting point, and a sowing step of sowing a metal powder on the binder. A precipitation step of precipitating the seeded metal powder in the binder, and a firing step of firing the base material in a state where the metal powder is precipitated in the binder. Is a part of that.

For this reason, a metal pattern having a high-class feeling similar to that of an ancient inlaid can be obtained with good adhesion, and easily and efficiently. When the welded metal portion is completely removed, a trace of the welded portion remains, and a so-called watermark pattern can be formed.

In another aspect of the present invention, there is provided a method of manufacturing a decorative article with a metal pattern, comprising: a pattern forming step of adhering a binder to a base material having a high melting point; and a sowing step of lacquering a metal powder on the binder. A precipitation step of depositing the sowed metal powder in a binder, a step of fixing a metal piece or a metal foil on the binder in a state where the metal powder is precipitated, a step of depositing the metal powder in the binder, and A firing step of firing the base material in a state where the foil is fixed, wherein a portion where the metal powder and the metal piece or the metal foil are welded is a metal pattern or a part constituting the metal pattern.

For this reason, a metal pattern having a high-grade feeling similar to that of an ancient inlaid can be obtained with good adhesion, easily and efficiently. It should be noted that a metal pattern having a three-dimensional effect can be obtained by combining with a concave-convex (pear-skinned) portion. In addition, when the finished surface is desired to have flatness, the polishing can be sufficiently performed. Further, it is suitable when the same color is required over a wide area.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a decorative article with a metal pattern and a method of manufacturing the decorative article according to the present invention will be described with reference to FIGS. First, a decorative article with a metal pattern according to the first embodiment and a method of manufacturing the decorative article will be described with reference to FIGS.

The decorative article with a metal pattern according to the first embodiment is a spoon 1 made of stainless steel as shown in FIG. 1, and a flower is imitated on a dish-shaped smooth surface 3 of a spoon portion 2 at the tip. Metal patterns 4 and 4 are provided. The handle 5 of the spoon 1 is provided with an engraved pattern 6 which is formed simultaneously with the molding of the spoon 1a before completion.

The metal pattern 4 is formed on the spoon portion 2 in the steps shown in FIG. First, a spoon 1a having no metal pattern 4 but sufficiently usable as a spoon is prepared (step S1). The spoon 1a is usually provided with an engraved pattern 6 by press molding and the shape is adjusted, and the spoon 2 serves as a base material (base metal) for the metal pattern 4. The spoon portion 2 is brushed, and both the inner surface 3 and the back surface are mirror-finished.

Next, a binder 11 is applied to the inner surface 3 of the spoon portion 2 by handwriting or printing such as lacquer work, and the same pattern as the metal pattern 4 is formed to form a pattern (step S2). This pattern is expressed as
The thickness is 0 μm, and in the case of printing, the thickness is about 50 μm. As a printing method, screen printing, tampo printing, photoresist or the like is employed. This step S2
FIG. 3 is a cross-sectional view showing the state where the binder 11 is attached in FIG.
It is shown in (A).

The binder 11 is an ink capable of performing thick printing. This ink is obtained by adding water-soluble boric acid to lacquer.
1 (hereinafter referred to as an original binder) as a main component. Generally, it is quite difficult to make the applied binder thicker. Moreover, in the first embodiment, the binder must be able to fuse with the stainless steel serving as the base material. For this reason, the material of the binder is an important point.

In the first embodiment, boric acid which is easily oxidized and reduced is used as the flux in the binder in consideration of the compatibility with the base metal in the firing step described later. Although it is necessary to dissolve this boric acid in a solvent such as water, in this embodiment, boric acid is dissolved in water to obtain water-soluble boric acid. As described above, a water-soluble additive is used as a material for the binder, but there are very few media (solvents) that are easily mixed with water. By the way, lacquer, which is a natural product, is very compatible with water and has considerable viscosity. For this reason, in the first embodiment, the lacquer and the water-soluble boric acid are mixed to form the original binder as described above.
The water-soluble boric acid is obtained by mixing glycerin, alcohol and sodium hydroxide in water. Further, water glass may be put in the original binder.

The viscosity of the raw binder is adjusted by mixing turpentine oil. Further, in order to delay the hardening of the original binder, a positive oil which assists oxidation and reduction is added, or the atmosphere is at 40 to 50 ° C. The binder to be used (hereinafter, referred to as a completed binder 11) is determined by mixing turpentine oil or adding a normal oil or the like. The curing time is preferably about 30 hours in consideration of the subsequent seeding step S4. In addition, when the atmosphere is at a temperature of 40 to 50 ° C., the lacquer is less likely to lose moisture and harden, and can delay curing.

After the pattern is formed in step S2, a metal different from the base metal (stainless steel), in this embodiment, silver and copper alloy raw powder 12
(See step S3).
The metal to be sowed can be variously selected depending on the base metal, but gold, silver, noble metals such as platinum, copper, iron,
General metals and alloys such as brass are employed.

It is preferable that each metal powder be a hard wax powder in order to increase the adhesion in the firing step described later. For example, brass brass powder, gold brass (BAu)
Powder, silver wax (BAg) powder and the like. Instead of a single metal powder, a plurality of metal brazing powders may be used at the same time, or brass or an alloy brazing powder such as silver and copper of the first embodiment may be used. In addition, the sowing flour is preferably performed once or twice, but may be performed three times or more. FIG.
(B) shows a cross-sectional state at the time of sowing.

Next, seeding of the seeding is performed (step S).
4). The alloy raw powder 12 gradually precipitates in the completed binder 11 applied in step S4.
At the same time as the precipitation action, the curing of the finished binder 11 also proceeds. Fig. 3 shows the state where the curing is completed and the precipitation is stopped.
It is shown in (C). In addition, the precipitability is better as the metal powder has a higher specific gravity. Naturally, sedimentation differs depending on the specific gravity and size of the metal powder. 24K gold powder has the best precipitation property, and 18K gold powder is also quite good. In addition, brass powder and silver powder have many fine powders, and the precipitation property is not so good.

Finally, firing is performed (step S).
5). In this firing step, a continuous non-oxidizing furnace 21 as shown in FIG. 4 is used, and the spoon 1 is spun at a speed of 10 m / 10 minutes.
a moves in the furnace. The furnace time is 4 to 5 minutes, and the furnace temperature is 1050 ° C. The furnace temperature is selected variously depending on the type of powder metal. For example,
Brass or gold is preferably 980 to 1080 ° C.
50 ° C., 900 to 980 ° C. for silver based, preferably 950 ° C.
℃, copper system is 950-1050 ℃, preferably 1000
° C.

The continuous non-oxidizing furnace 21 includes a belt conveyor 22
Is driven by a motor (not shown), and the spoon 1 a sowed is placed on the belt conveyor 22. An exhaust port 23 is provided to prevent an accident such as an explosion during firing.

In this firing, first, 400 to 500
The lacquer in the finished binder 11 is fired at 500 ° C.
Oxidation and reduction occur at 00 ° C., and boric acid disappears. Then, at about 900 to 1000 ° C., the alloy raw powder 12 is welded to the surface 3 of the spoon portion 2 made of stainless steel. Thereafter, the surface 3 and the welded portion are polished by a buff. By this polishing, a brilliant metal pattern 4 is formed as shown in FIG.
It is formed as shown in FIG. Although the surface is brilliant by polishing, if the polishing is not strong, a part of the alloy raw powder 12 remains on the surface and the uneven surface is maintained.

When the polishing after the firing is sufficiently performed, the surface of the welded portion becomes flat.
The height H of the metal pattern 4 shown in (D) becomes almost zero, and the state shown in FIG. 5 is obtained. That is, only the alloyed portion 13 alloyed with the alloy powder and the stainless steel remains, and this portion becomes a trace of welding, and becomes a so-called watermark pattern. In this way, the metal pattern 4 may be made like a watermark pattern.

If steps S2 to S4 are repeated before firing, so-called overcoating can be performed, and the height H of the metal pattern 4 can be further increased.
Further, after firing, steps S2 to S4 may be repeated again. In the case where recoating or the like is performed after firing, it is necessary to use metal powder that is deposited at a temperature lower than the initial firing temperature.

In the first embodiment, stainless steel is used as the base material. This is because the melting temperature is as high as 1100 ° C. or more, and there is no influence even at the temperature at which the gold or silver powder is welded. For this reason, a material that is not plated and has a high melting temperature, such as a mirror-finished stainless steel, is suitable as the base material. The base material may be a non-metallic material such as ceramics in addition to metal.

Conventionally, pattern attachment is performed mainly by plating or printing, other than by stamping or stamping. In the case of plating or printing, the drawback is that it is easily peeled off. However, in the method according to the first embodiment, since the foreign metal powder is welded to the base metal, it is difficult to peel off. Moreover, in the welding process, a spoon portion 2 serving as a base metal is provided.
In the portion where the metal pattern 4 adheres, the alloyed portion 13 is formed by welding of the base metal and the powder of the foreign metal, and the adhesion is further improved.

In addition, there are few conventional products that attach a foreign metal to a curved portion such as the inside of the spoon portion 2, and there is no conventional product that firmly attaches the foreign metal. In this embodiment, the foreign metal can be easily and firmly attached to the curved surface. Moreover, when it is desired to make the metal pattern 4 thick, handwriting is used, and when mass production is performed, various requirements can be met by using a printing technique such as tampo printing.

In the first embodiment, the method of mixing the metal powder in the completed binder 11 in advance is not adopted, but the metal powder is printed after forming the pattern with the completed binder 11. This is because when the metal powder is put into the finished binder 11, it is necessary to make the powder finer in order to facilitate the formation of the pattern. However, when the fine metal powder is used, the surface of the metal pattern 4 does not have a rough feeling, This is because the metal powder becomes inferior and uninteresting, and the finer the metal powder becomes, the higher the cost becomes. Also,
Even if a sufficiently fine metal powder is used, the finished binder 11
When the mixing method is adopted, it is also easy to cure, making it difficult to form a pattern and making it difficult to write fine lines. Also, if the ratio of the metal powder to be mixed is increased, the pattern itself cannot be formed.

In the first embodiment, since natural lacquer is used as the completed binder 11, it is easy to harden, and it is hard to cause an accident such as an unexpected explosion. Therefore, instead of the continuous non-oxidizing furnace 21 having the exhaust port 23, a firing furnace which does not need to consider the exhaust may be used, and the furnace apparatus can be made small and inexpensive.

Next, a decorative article with a metal pattern according to a second embodiment and a method for manufacturing the same will be described with reference to FIGS. The decorative article with a metal pattern according to the first embodiment and the method for manufacturing the decorative article are described in the spoon 1 (decorative article with a metal pattern) and the spoon 1 (decoration) according to the first embodiment. The method is basically the same as the method of manufacturing the product, and different points will be mainly described, and description of the same or similar parts will be omitted or simplified.

In this decorative article with a metal pattern, a metal pattern 34 of a foreign metal is applied to the surface 33 of a base metal 32 made of stainless steel on the back cover 31 of the wristwatch. The metal pattern 34 raises a protruding pattern 36 which is a protruding portion formed in the central concave portion 35 of the base metal 32 and forms a pattern portion in cooperation with the protruding pattern 36.

Back 3 of a wristwatch with a metal pattern 34 attached
1 is basically the same as that of the spoon 1 described above. That is, the same process and the same kind of material are used from step S2 of pattern formation to step S5 of baking. On the other hand, the projecting pattern 36 on the back cover 31 of the wristwatch
5 is provided in advance. Then, the completed binder 11 is applied in the recess 35 as shown in FIG. After firing, the surface 33 and the metal pattern 34 are polished to be flush with each other as shown in FIG.

In the second embodiment, step S3
The metal powder used in the metal powder sowing process of 1
8K gold powder 12 '. Gold low powder 1
2 'is initially located on the upper surface of the completed binder 11 as shown in FIG.
As shown in FIG. 3C, the light enters the recess 35. Then, in the firing step, as shown in FIG. 7 (D), the gold brazing powder 12 ′ is melted and welded to the base metal 32 to form a welded portion 14 and an alloyed portion 13 ′ of gold and stainless steel is formed. Is done.

Next, a third embodiment of the present invention will be described with reference to FIG.

The feature of the third embodiment is that the metal piece 41 or the metal foil is fixed to the upper surface of the completed binder 11 between the lacquer precipitation step in step S4 and the firing step in step S5. That is, after forming a pattern as shown in FIG. 8A, sowing of the metal powder 12 or 12 ′ is performed once or twice or three to four times. After the steps of sowing and sedimentation, a metal piece 41 or a metal foil is fixed to the upper surface of the completed binder 11 as shown in FIG. Next, firing is performed, and as shown in FIG.
Is dissolved so as to cover the completed binder 11 and then solidified. As a result, the first layer 42 in which the metal powders 12 and 12 'are dissolved and the second layer 43 in which the metal pieces 41 are dissolved are integrally formed inseparably.

According to the third embodiment, after firing, FIG.
As shown in (E), sufficient polishing is performed so that the finished surface has flatness. As shown in FIG. 8 (E), the metal layer 41 is dissolved on the upper side of the seeded first layer 42, and the second layer 43 which is the remaining flat metal surface is disposed. Become.

The seeding and sedimentation process is performed once or twice or three or four times. However, even if the seeding and sedimentation is performed three or four times, the binder surface remains on the surface after the sedimentation. Therefore, the metal piece 41 or the metal foil can be fixed. Thus, when performing 3-4 times of sowing flour, it is preferable to set the precipitation time per time to 2-3 hours. Note that the polishing shown in FIG. 8E may not be performed, and only the slight surface polishing may be performed or the surface polishing may not be performed after the firing in FIG.

As in the third embodiment, the metal piece 4
As shown in FIG. 8, the method of fixing the metal foil 1 or the metal foil after the sowing is suitable when the finished surface needs to be flat.
This is effective when it is desired to generate a state other than the above, or when the same metal color is required over a large area.

As an example of generating a state other than satin on the upper surface of the lacquer work, as shown in FIG. 9, a stem portion of a plant figure is fixed by dissolving and solidifying a metal piece 41 to form a portion where the second layer 43 appears on the surface. That is, the process shown in FIG. 8 is performed. On the other hand, the leaves are fired without fixing the metal pieces 41 or slightly polished, that is, the portions where the first layer 42 appears. There are cases. In this manner, the stem portion has a flat mirror surface, while the leaf portion has a satin-like shape, and a three-dimensional expression is possible. It should be noted that a part of the stem portion may be formed as a stem portion at the lower right in FIG. 9 by leaving a convex portion as shown in FIG. 8D.

It should be noted that if the metal pieces 41 and the metal foil are directly placed on the finished binder 11 and fired without performing sowing with the metal pieces 41 and the metal foil, the metal pieces 41 and the metal foil move during firing, and the pattern tends to be incomplete. And the welding becomes unstable. For this reason,
Before the metal pieces 41 are fixed, seeding of metal powder is required.

Each of the above embodiments is an example of a preferred embodiment of the present invention. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. is there. For example, as the base material, in addition to the metal material, a non-metal material such as a ceramic, a ceramic, a super hard plastic, and a glass material can be adopted.

Further, the base material and the metal material to be adhered need to have a higher melting point in the base material. A material having a low melting point as described above may be used as the base material. When brass is used as the base material, a metal material having a lower melting point, such as solder powder, is used as the foreign metal powder.

Further, the decorative article refers to all products such as parts, devices, and objects having a metal pattern. Specifically, brochures, hairpins, pin batches, key chains, business cards and other highly decorative items, spoons, cups, ashtrays, trouser band clasps, etc., watch front and back covers, Industrial products such as bands, bezels, chairs and desks, and the like are included.

It should be noted that the surface of the metal patterns 4 and 34 may be made to have an uneven feeling without polishing after firing. Further, the metal pattern 34 forms a pattern portion with the protruding pattern 36, but only a portion corresponding to the protruding pattern 36 is formed as a concave portion, and a foreign metal is buried in the concave portion. A metal pattern may be formed.

An epoxy paint may be used instead of lacquer. In this case, it is preferable to lengthen the curing time by not inserting a curing material. Since the epoxy material has a high viscosity, it is preferable to use an acetone-based flux instead of water. When an epoxy-based paint is used, shrinkage is small and the amount of sowing powder can be increased. When using an epoxy paint, the curing time is preferably about 10 hours.

[0058]

According to the decorative article with a metal pattern of the present invention, a decorative article with a metal pattern in which a metal pattern having the same high-quality feeling as that of an ancient inlaid and a metal pattern having adhesion more than that of the conventional inlaid is easily and efficiently formed. Goods can be obtained. In the decorative article with a metal pattern according to another invention, a metal pattern called a so-called watermark pattern can be formed on the base metal. Furthermore, in the decorative article with a metal pattern according to another invention, it is possible to form a metal pattern that is flat and has no irregularities and is strongly fixed to the base material.

In addition, the method for producing a decorative article with a metal pattern according to the present invention eliminates the need for advanced skills, provides a sense of quality similar to that of an ancient inlaid, has a higher adhesion than before, and is simple and efficient. A metal pattern can be formed on the base material, or a so-called watermark pattern can be formed. Further, in the method of manufacturing a decorative article with a metal pattern according to another invention, the metal pattern is a flat metal pattern having no irregularities and strongly fixed to the base material, and is combined with irregularities (pear-skin) to form a three-dimensional appearance. It is possible to form a metal pattern having a certain shape.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a decorative article with a metal pattern according to a first embodiment of the present invention.

FIG. 2 is a process diagram illustrating a process of manufacturing the decorative product with a metal pattern of FIG. 1;

FIG. 3 is a partial sectional view showing a state of a pattern portion in each step of FIG. 2;

FIG. 4 is a view illustrating a continuous non-oxidizing furnace used in a firing step in the step of FIG. 2;

FIG. 5 is a partial cross-sectional view showing an example in which a welded portion is scraped off after a firing step as a last step in the step of FIG. 2 and is flush with a base material.

FIG. 6 is a view showing a decorative article with a metal pattern according to a second embodiment of the present invention, wherein (A) is a plan view thereof, and (B) is (A).
FIG. 7 is a sectional view taken along line BB of FIG.

FIG. 7 is a partial cross-sectional view showing a state of a pattern portion in each step of manufacturing the decorative article with a metal pattern in FIG. 6;

FIG. 8 is a partial cross-sectional view showing a state in each manufacturing process of the decorative article with a metal pattern according to the third embodiment of the present invention.

FIG. 9 is a plan view showing an example of a pattern portion of a decorative article with a metal pattern according to the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spoon (decorative article with a metal pattern) 2 Spoon part (base material and base metal) 3 Surface 4 Metal pattern 11 Finished binder (binder) 12 Alloy raw powder (foreign metal powder) 12 'Gold raw powder (for foreign metal) 13, 13 'alloyed portion 14 welded portion 31 watch back cover (decorative product with metal pattern) 32 base metal 33 surface 34 metal pattern 35 concave portion 36 projecting pattern (protruding portion)

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Matsuzawa 272-1, Fumide Toyota, Suwa City, Nagano Prefecture

Claims (9)

[Claims] 1. A metal pattern, wherein a powdery metal having a low melting point is welded to a base material having a high melting point, the welded portion is formed as a metal pattern, and the surface of the metal pattern is formed with irregularities. With ornaments. 2. The base material is made of metal, the powdered metal is made of a different metal different from the base material, and the irregularities are formed by exposing a part of the powder of the different metal to the surface. The decorative article with a metal pattern according to claim 1, wherein: 3. A concave portion is provided in a base material having a high melting point, a powdery metal having a low melting point is welded and buried in the concave portion, and the buried portion or a protruding portion of the base material formed in the concave portion is provided. A decorative part with a metal pattern, wherein a part in which the embedment part and the embedded part are integrated is formed as a metal pattern. 4. A decorative article with a metal pattern, wherein an alloyed part with a foreign metal having a low melting point is formed on a surface of a base metal having a high melting point, and the alloyed part is formed as a metal pattern. 5. A decorative article with a metal pattern, wherein a trace of a powdered foreign metal having a low melting point is formed on the surface of a base metal having a high melting point, and the trace is formed as a metal pattern. 6. A base material having a high melting point is provided with a first layer in which a powdered metal having a low melting point is welded, and a second metal or metal foil having a low melting point is melted on the first layer. A decorative article with a metal pattern, wherein a layer is formed integrally with the first layer, and a portion where both layers are provided has a metal pattern. 7. A step of welding a foreign metal having a low melting point to a base metal having a high melting point, and a step of removing at least a part of the welded foreign metal to make the surface of the base metal and a welded portion coplanar. A method for producing a decorative article with a metal pattern, wherein a trace from which the deposited foreign metal is removed or a remaining foreign metal portion is used as a metal pattern. 8. A pattern forming step of attaching a binder to a base material having a high melting point, a sowing step of engraving a metal powder on the binder, and a precipitating step of precipitating the inoculated metal powder in the binder. And a firing step of firing the base material with the metal powder precipitated in the binder, wherein a portion where the metal powder is welded is a metal pattern or a part constituting the metal pattern. A method for producing a decorative article with a metal pattern. 9. A pattern forming step of adhering a binder to a base material having a high melting point, a sowing step of engraving a metal powder on the binder, and a precipitating step of precipitating the inoculated metal powder in the binder. A step of fixing a metal piece or a metal foil on a binder in a state where the metal powder is precipitated, and firing the base material in a state where the metal powder is precipitated in the binder and the metal piece or the metal foil is fixed. A method of producing a decorative article with a metal pattern, wherein a portion where the metal powder and the metal piece or the metal foil are welded is a metal pattern or a part constituting the metal pattern.