JP2011021277A - Method of manufacturing precious metal ornament having watermark pattern and precious metal ornament having watermark pattern - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of precious metal ornaments having a watermark pattern such as a stained glass-like pattern by suitably combining the fired body of a precious metal clay state component with raw materials for cloisonne and technology, and to provide the precious metal ornaments. <P>SOLUTION: The manufacturing method of the precious metal ornaments (8G) having a watermark pattern comprises: a molding body-forming step for preparing a network molding body 31 having a space part 32 communicating with the outside by laminating a plurality of precious metal powder-containing pasty components using a syringe; and a porcelain enamel layer-forming step where, in a state where a network fired body obtained by firing the molding body 31 is placed on a nonflammable cloth, the space part is coated with a glaze for cloisonne, firing is performed, thereafter, the nonflammable cloth is removed, and a part only composed of a cloisonne enamel layer is formed at the space part in contact with the side wall at the inside of the space part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a method for producing a noble metal ornament having a watermark pattern that has a decorative feature that is simple and unprecedented by appropriately combining a calcined body of a noble metal clay-like composition and raw materials and techniques of cloisonne, and a watermark pattern It relates to a noble metal ornament having

Traditionally, cloisonne is a baked product in which a glaze is placed on the base and fired at a high temperature, and differs from other baked goods in that metal is used for the base. However, the processing means (technique) has mature technology. is doing. As the base, copper, red copper, silver, etc. are generally used as the base metal, the base plate is formed using casting or various engraving tools, and the glaze is based on silica, lead red, glass stone, etc. Metal compounds that produce various colors are added, and these glazes are baked to form a cloisonne layer .

In Patent Document 1, a glaze was applied to the surface of a porous fired body having a density ratio of 60 to 95% obtained by shaping using a plastic composition containing noble metal powder and firing the plastic composition. Thereafter, a method of firing is disclosed.
Furthermore, Patent Document 2 discloses a manufacturing method in which a plastic composition containing a noble metal powder is formed, a glass composition is attached to the surface, and this is fired.

Japanese Patent No. 3147697 Japanese Patent No. 3004038

In the technique of Patent Document 1, the glaze layer formed by firing the glaze is firmly adhered when the glaze is applied to the porous fired body and fired.
However, in Patent Document 1, since the glaze is applied to the surface of the porous fired body, that is, only the coating layer is formed, the obtained fired body is not visually interesting. It was. .
Also, in Patent Document 2, a product in which the heel layer is firmly adhered is obtained and can be manufactured in a short time. Similarly, the glass composition is applied to a part of the surface of the shaped body before firing. Thus, the fired body obtained was not visually interesting.

Therefore, the present invention communicates with the outside of the noble metal sintered body in the form of a lattice, a net, etc. by appropriately combining the noble metal decorative article, which is a fired body of the noble metal clay-like composition, and the cloisonne material and cloisonne glaze technology. A method for manufacturing a noble metal ornament having a watermark pattern in which a cloisonne layer is formed in a space to be formed, for example, a stained glass-like pattern, etc., and having a watermark pattern that has a simple decorative property, and the noble metal ornament is provided. The purpose is to do.

The present invention has been proposed in view of the above, and has found a technique that does not use the cloisonne layer as a coating layer so as to provide a visually appealing decorative combination of a precious metal fired body and a cloisonne layer , The present invention has been achieved.
The method for producing a noble metal ornament having a watermark of the present invention
A shaped body forming step of creating a shaped body having a space portion communicating with the outside by overlapping a plurality of layers using a syringe with a paste-like composition containing a noble metal powder;
After the fired body obtained by firing the shaped body is placed on an incombustible cloth , the cloisonne glaze is applied to the space part and fired, and then the incombustible cloth is removed and the inner wall of the space part is contacted. A cocoon layer forming step for forming a part consisting of only the cloisonne cocoon layer in the space part ,
It is characterized by including.
The space portion communicating with the outside refers to a space portion of a noble metal sintered body such as a lattice shape or a net shape , and a cloisonne layer is formed in the space portion.

The noble metal decorative article having a watermark pattern according to the present invention is characterized in that a portion consisting only of a cloisonne layer is formed in a space portion that is formed of a noble metal sintered body and communicates with the outside.

In the method for producing a noble metal decorative article having a watermark pattern of the present invention, a paste body composition containing a noble metal powder is created by using a syringe to form a shaped body having a space portion that communicates with the outside by overlapping a plurality of layers. After applying the cloisonne glaze to the space part and firing it in a state where it is placed on the fired body incombustible cloth obtained by firing the molded body , the space is removed by removing the incombustible cloth and contacting the inner wall of the space part. A part consisting of only the cloisonne layer is formed in the part, and the cloisonne layer is not provided on the surface of the fired body, but the cloisonne layer is held by the fired body from the side.
Precious metal decorations with watermark of the present invention, since for example grid-like or external composed only Cloisonne enamel layer in a space portion communicating with the portion of the net or the like of the precious metal sintered body is formed, for example, stained glass wind watermark Can be a decorative pattern. In this case, the frame portion may be made of a clay-like composition containing noble metal powder, and the glass portion may be made of the cloisonne layer, so that a stained glass-like ornament can be manufactured very easily.

(A) a perspective view showing a state in which shaping of the reticulated shaped bodies in the silver paste composition definitive to the present invention, (b) sectional view, spatial overlap 2-3 layers of (c) net shaped body of the main part The perspective view which shows the state which shape | molded the part, (d) Sectional drawing of the principal part (space part) , (e) The perspective view which shows the obtained silver ornament, (f) It is sectional drawing of the principal part.

  The clay-like composition used in the present invention contains a noble metal powder, and more specifically, is obtained by kneading a noble metal powder and an organic binder.

  The noble metal powder is a pure noble metal powder such as Au, Ag, Pt, Pd, Rh, Ru, Ir, Os, or a noble metal alloy powder mainly containing one or more of these elements, and is particularly limited. However, a powder having an average particle diameter of 20 μm or less and a maximum of about 60.0 μm and a minimum of about 0.3 μm is preferable.

The organic binder is not particularly limited, but at least water-soluble cellulose resin, British gum, xanthan gum, dextrin, dextran, pullulan, sodium alginate, polyerylene oxide, polypropylene oxide, polyvinylpyrrolidone, polyethylene glycol, It is preferable to use one or more selected from polyacrylic acid, polyacrylic acid ester, water-soluble acrylic resin, urethane resin, thermoplastic resin, and oil-based binder.
Among the organic binders, the water-soluble cellulose resin and the British gum serve to impart plasticity and improve adhesion. Polyethylene oxide functions to give high viscosity at a low concentration and to improve adhesiveness in liquid form. Glycerin provides moderate water retention. Sodium alginate gives moderate water retention like glycerin, but also contributes to the adhesion improving action. The polyacrylic acid ester and the polyacrylic acid serve to strengthen the adhesiveness. The oily binder is preferably a polymer organic binder such as an acrylic resin.
As an organic binder, it is particularly desirable to use 0.02 to 3.0 wt% starch and 0.02 to 3.0 wt% water-soluble cellulose resin in terms of solid content excluding water. Among these, the water-soluble cellulose resin serves to impart plasticity and improve adhesion as described above, but starch increases the dry strength when the silver powder composition is dried. However, when only starch is used as the organic binder, cracking of the dough easily occurs during modeling. Therefore, these problems can be solved by using a water-soluble cellulose resin together. As described above, starch contains 0.02 to 3.0 wt% in terms of solid content excluding water in the clay composition, but if less than 0.02 wt%, it tends to cause insufficient strength during drying. Become. On the other hand, if it exceeds 3 wt%, the fabric cracks easily occur during modeling. Also, the shrinkage rate increases. On the other hand, as described above, the water-soluble cellulose resin also contains 0.02 to 3.0 wt% in terms of solid content excluding water. If it is less than 0.02 wt%, the effect of imparting plasticity is sufficient. It is not demonstrated. When it exceeds 3 wt%, the shrinkage rate increases. As such a water-soluble cellulose resin, methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, or the like is used, which is dissolved in water.
As the amount of the organic binder composed of the starch and the water-soluble cellulose resin, the total amount of the starch and the water-soluble cellulose resin is preferably in the range of 0.1 to 4 wt%. If the amount of the organic binder is less than 0.1, it is difficult to maintain the shape. In addition, there is an inconvenience that the strength after shaping and drying becomes weak. When the amount of the organic binder exceeds 4 wt%, shrinkage increases and cracks are likely to occur. Therefore, the amount of the organic binder is suitably 0.1 to 4 wt%.
The required amount of water is added. If it is too small, it becomes hard and difficult to form, and if it is too much, the shape cannot be maintained. This silver powder-containing composition can be prepared in the form of clay, paste or slurry depending on the water content.
Bi, Se, Sb, In, Sn, Zn powder or alloy powder thereof may be added as a sintering accelerator.
Furthermore, you may add the metal compound powder or glass powder chosen from lead carbonate, lithium carbonate, zinc oxide, phosphoric acid, sodium carbonate, vanadium oxide, sodium silicate, phosphate etc. as an adhesive improvement agent.
In addition, for the purpose of improving plasticity, a network polymer formed by condensation of structural units having a phenylpropane skeleton, glycerin, diglycerin, isoprene glycol, 1/3 butylene glycol, liquid paraffin, alcohols, fats and oils, phthalates An acid, phthalic acid-n-dioctyl, phthalic acid-n-dibutyl, and polyvinyl alcohol may be added, and a surfactant, a surfactant, and an anti-tacking agent may be added as necessary.

  A composition containing noble metal powder 75 to 99 wt%, an organic binder 0.1 to 4 wt% and the balance water is suitable for the addition ratio of each component in the clay composition. In addition, when the ratio of the noble metal powder is high within the above range, it has a clay-like behavior, but when the ratio of the noble metal powder is low, the viscosity is low and the slurry or paste-like behavior is obtained. In the present invention, both are called “clay-like”.

  In the preferred composition, the precious metal powder is 75 to 99 wt%. However, if the amount is too small, the shrinkage becomes large and the sintering also becomes troubled. If the amount is too large, the proportion of the organic binder and water is increased accordingly. As a result, it hinders modeling.

The cloisonne glaze is composed mainly of silica (SiO ₂ ), red lead (Pb ₃ O ₄ ), and nitrate (K ₂ O), and Al ₂ O ₃ , B ₂ O ₃ , Na ₂ O, ZnO, P _2. Glass source materials such as O ₅ , P ₂ O ₃ , Sb ₂ O ₃ , Sb ₂ O ₅ , As ₂ O ₅ , V ₂ O ₅ , CaO, MgO, PbO, TiO ₂ , alone or in combination It can be used by mixing. It is also possible to add color pigments such as gold, lead chromate, iron oxide, manganese oxide, cobalt oxide, copper oxide, chromium oxide, antimony oxide, iridium oxide, and other metal oxides. In particular, it is desirable to use a glaze having a softening point lower than the melting point of the noble metal powder. Many of these glazes melt at about 800 ° C. and develop color by sticking to the metal surface. In order to prevent dust during color development, it is necessary to wash the glaze with water before preparing the glaze. Some glazes are transparent, translucent, and opaque after firing. Transparent glazes are commercially available with “suki (transparent)” at the end, such as “white skies” and “peach skies”. Among commercially available cloisonne glazes, coarse and medium grains mean 50-80 mesh, and fine grains mean 80-120 mesh. Moreover, the cloisonnette frit which is the same component as a glaze means a thing with a particle size larger than them.

In the present invention, although not particularly limited, the molded body creation step may be performed on a non-combustible cloth, and is particularly suitable when, for example, a minute and complicated shape is formed using a syringe. is there. This non-combustible cloth is a mold release material that plays the role of preventing the flow of glaze.
And after baking a clay-like composition previously, it is made to bake a cloisonne layer in a space part .

  When handling cloisonne glazes, known cloisonne technology, cloisonne processing materials, etc. may be used. For example, when firing a product, a support platform called a kula or a wire mesh may be used as a hearth plate. When serving the glaze, you may make it using a brush or a bamboo spat called Jose.

[Silver powder]
A silver mixed powder composed of 50% by weight of silver powder having an average particle diameter of 2.5 μm and 50% by weight of silver powder having an average particle diameter of 20 μm was used.
[Mixture of organic binder and water]
Table 1 shows the composition of the mixture of the organic binder used and water.

[Silver paste syringe injection composition]
A silver paste syringe injection composition was prepared by adding 85% by weight of the silver powder and 15% by weight of a mixture of the organic binder and water. This composition is extruded with a syringe into the desired design.

[Cloisonne for cloisonne]
Pure white (translucent white)
Sky blue violet

[Example 1]
A noble metal ornament 8G shown in FIG. 1 (e) shows an embodiment of the present invention .
As shown in FIGS. 1 (a) and 1 (b), on a non-combustible cloth (not shown), a space part communicating with the outside in the reticulated body 31 as shown in the figure using a syringe with the silver paste syringe injection composition. 32 was shaped and dried. Subsequently, as shown in FIGS. 1C and 1D, two to three layers of the silver paste composition are stacked using a syringe to form a watermark, and the inner wall of the space portion has a concavo-convex shape. A shaped body 31 is assumed. The net-like shaped body 31 was dried and baked at 800 ° C. for 10 minutes in an electric furnace. After firing, it was finished with a barrel or a stainless brush and a polishing spatula.
Place a non-combustible cloth on the fireproof board, place a fired body on it , close the bottom of the space 32 so that the non-combustible cloth is located at the bottom of the space 32, and contact the inner wall of the space. The cloisonne glaze 33 was applied (filled) to 32, and the cloisonne layer 33 was baked at around 800 ° C. in an electric furnace. The incombustible cloth was removed after the cloisonne layer 33 was fired. Then, these operations were repeated several times, and when the cloisonne layer 33 was baked cleanly in the space portion 32, the operation was completed. In addition, the cloisonne layer is not baked in all the space portions 32, and some of the space portions 32 are left as designs.
The resulting precious metal ornaments. 8G, several of the color of cloisonne enamel layer 33 is formed, which respectively of the side of the cloisonne enamel layer 33 in which enclosed a silver fired body, silver of the watermark pattern of stained glass-style It was a decoration.

8G Precious metal ornaments 31 Model body 32 Cloisonne layer 8H Precious metal ornaments 41 Silver foil 42 Model body 43 Cloisonne layer

Claims (2)

And shaped bodies preparing step of preparing a shaped body to have a space communicating with the outside overlapping multiple layers of paste composition using a syringe containing a noble metal powder,
After applying and firing the cloisonne glaze to the space part in a state where the fired body obtained by firing the shaped body is placed on the incombustible cloth , the non-combustible cloth is removed, and the space part is in contact with the inner wall of the space part. A method for producing a noble metal ornament having a watermark pattern, comprising: a cocoon layer forming step for forming a portion consisting only of a cloisonne cocoon layer in a space . A noble metal decorative article having a watermark pattern, characterized in that a portion consisting only of a cloisonne layer is formed in a space portion that is formed of a noble metal sintered body and communicates with the outside.

Images