JP2000080404A - Method for firing noble metal clay and jig for firing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and simply execute firing by directly applying gas burner flame to a compacted body. SOLUTION: The surface of a tray-shaped heat insulating refractory 3 placed on a table 4 is mounted with a noble metal clay compacted body 1, and, the noble metal clay compacted body 1 is directly applied with gas burner flame 2 from the above, by which firing is executed. At this time, as the pan-shaped heat insulating refractory 3, a sheet, a tray or a vessel made of ceramics can be used. Moreover, As the gas burner, a handy type gas burner obtd. by fitting a burner nozzle to a portable gas bomb is used, by which the gas burner flame 2 is easily generated, and the noble metal clay compacted body 1 can easily be fired. Furthermore, the gas burner flame 2 can be applied while the position to be applied is easily deviated, so that the whole can uniformly be fired. In the case the compacted body is thin, preferably, the burner flame is applied in such a manner that the compacted body is shallowly buried into the ceramic powder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for easily firing a precious metal clay molded article and a jig for firing.

[0002]

2. Description of the Related Art It is generally known that noble metal clay is obtained by mixing pure gold powder, gold alloy powder, pure platinum powder, pure silver powder or silver alloy powder with a binder or the like. ing. The noble metal clay is molded into a predetermined shape and dried, and the molded body is placed in a temperature-controllable electric furnace or gas furnace and heated to be fired to produce a noble metal decorative article. The electric furnace or the gas furnace is relatively large and it is difficult for a maker to prepare it individually. Therefore, in recent years, a firing method using a household microwave oven, in which a precious metal clay molded body is placed in a firing box that absorbs microwaves and generates heat, is charged in a household microwave oven, and fired, has been proposed. ing.

[0003]

However, in the method of firing noble metal clay using a household microwave oven, temperature control is difficult, and the firing state of the noble metal clay molded body cannot be observed from the outside. In some cases, it was melted. Also, in the case where an individual maker makes one small noble metal ornament such as a ring ornament, for example, it is too large and not easy to use in a home-use microwave oven. Must be consumed a lot.

[0004]

Means for Solving the Problems Accordingly, the present inventors have
Research has been conducted to develop a method of firing precious metal clay more easily and more easily than before. (A) In order to fire a small precious metal clay compact, a gas burner flame is directly or indirectly applied to the precious metal clay. The precious metal clay molded body can be easily and easily fired simply by applying to the clay molded body. (B) The firing of the precious metal clay molded body by the gas burner flame is performed by the creator himself by watching the firing state by himself. From the place where you can adjust the gas burner flame while watching and adjust the distance between the precious metal clay molded body and the gas burner flame, you can bake in the state that the creator wants, and make precious metal decorations with precious metal clay They learned that they can further increase their joy.

The present invention has been made on the basis of such findings, and is characterized by a method of firing a noble metal clay by directly applying a gas burner flame to a noble metal clay molded body.

In the method of firing a noble metal clay of the present invention, as shown in a perspective view of FIG. 1, the noble metal clay molded body 1 is placed on a dish-shaped insulated refractory 3 placed on a table 4. Then, the gas burner flame 2 is fired by directly applying the precious metal clay molded body 1 from above. Dish-shaped insulated refractory 3
Can be a ceramic plate, dish or container.

FIG. 2 is a perspective view showing a method for firing a noble metal clay of the present invention in which a noble metal clay molded body is fired using a handy type gas burner. As shown in FIG. 2, a gas burner flame 2 is easily generated by using a hand-held gas burner in which a burner nozzle 6 is attached to a portable gas cylinder 5 as a gas burner, and the noble metal clay molded body 1 is further layered. It can be fired easily and easily. In addition, if a handy type gas burner is used, the position where the gas burner flame 2 is applied can be easily shifted while being applied, so that the whole can be heated and fired uniformly.

Accordingly, the present invention is characterized by a method of firing a noble metal clay by directly applying a gas burner flame generated by using a handy type gas burner to a noble metal clay molded body. is there.

When the precious metal clay molded body 1 is thin,
When a gas burner flame is directly applied to a thin precious metal clay molded body, the thin part may be melted. In such a case, it is preferable to indirectly apply the gas burner flame to the noble metal clay molded body. As shown in the cross-sectional view of FIG. 3, the noble metal clay molded body 1 is buried shallowly in the ceramic powder 12,
When the noble metal clay molded body embedded in the ceramic powder is fired by applying the gas burner flame 2 to the ceramic powder 12, the gas burner flame 2 becomes the noble metal clay molded body 1.
, The thin portion of the precious metal clay molded body 1 does not melt. The gas burner flame 2 used in this method can be obtained using a normal gas burner.
It can be obtained using a handy type gas burner.

Accordingly, the present invention provides a method of firing a noble metal clay molded by embedding a noble metal clay molded body in ceramic powder and subjecting the precious metal clay molded body embedded in the ceramic powder to a gas burner flame. , Are characterized by:

When a gas burner flame 2 is applied to a precious metal clay molded body 1 and fired in a demonstration at an exhibition hall where a visitor is present,
It is not preferable to give anxiety that the fine powder of the dried noble metal clay is scattered in the direction where the observer is present due to the ejection of the gas burner flame 2. In such a situation, it is preferable to fire the noble metal clay molded body using a jig shown below that makes the gas burner flame 2 invisible.

FIG. 4 is a sectional view showing the jig. FIG.
As shown in the cross-sectional view of FIG. 1, the precious metal clay molded body 1 is charged into a baking space 8 of an insulated refractory container 9 provided with an opening 7 in a side wall.
0, a gas burner flame is blown into a firing space 8 of the insulated refractory container 9 through an opening 7 provided in a side wall of the insulated refractory container 9, and the precious metal clay molded body 1 is While observing the firing state, the amount of fire of the gas burner flame 2 and the thermal power are adjusted, and the precious metal clay compact is fired so as to uniformly heat the firing space 8. As shown in the sectional view of FIG. 5, at least two openings 7 are provided on the side wall so as to intersect in the thickness direction, and the gas burner flame 2 injected from the opening 7 flows spirally along the side wall. It is preferable to do so. The gas burner flame 2 used in this method can be obtained using a normal gas burner, but can be obtained using a handy type gas burner.

Accordingly, the present invention provides a method for charging a precious metal clay molded body into a baking space of a heat-insulated refractory container having a lid provided with a peephole, and allowing gas to pass through an opening provided on a side wall of the heat-insulated refractory container. The present invention is characterized by a firing method of a noble metal clay and a firing jig, in which a burner flame is blown into a firing space of a container made of an insulated refractory, and the firing space is uniformly heated to fire a precious metal clay molded body.

When the precious metal clay molded body is a relatively large and thick precious metal clay molded body, the precious metal clay molded body is placed on a dish-shaped insulated refractory, and a gas burner flame is applied to the precious metal clay molded body. If it is attempted to sinter the entire precious metal clay molded article by continuously applying the same, a strong gas burner flame must be continuously applied directly from above the precious metal clay molded article. If a strong gas burner flame is continuously applied directly from above the precious metal clay molded body, the temperature difference due to heating will increase and the precious metal clay molded body will be heated above its melting point while the entire precious metal clay molded body is not fired. In some cases, it melts and the entire precious metal clay molded body cannot be fired uniformly. In such a case, FIG.
As shown in the figure, the noble metal clay molded body 1 is placed on a heat-resistant alloy or ceramic net 13 or the like, and the noble metal clay molded body does not melt the weak gas burner flame 2 ′ from below the noble metal clay molded body 1. The precious metal clay molded body 1 is maintained at a temperature of 100 to 900 ° C. while being applied at the same time. The whole body can be fired.

Therefore, the present invention is characterized by a method of firing a noble metal clay, which is fired by directly applying a gas burner flame to a noble metal clay molded body from above and below.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Example 1 A pure silver clay molded article 1 obtained by molding and drying pure silver clay is produced. Using a handy type gas burner in which a burner nozzle 6 was attached to a portable gas cylinder 5 and placed on a ceramics dish 3, a gas burner flame 2 was applied to the heart-shaped pure silver clay molded body 1 and heated to start firing. . Immediately after the firing, the binder contained in the pure silver clay is burned.
Guess. When the burning of the binder was completed, the gas burner flame was adjusted so that a slight orange color remained at the tip and turned into a blue flame, and was lit red for 3 minutes while the gas burner flame hit the entire surface visually. The firing was completed, and a heart-shaped pure silver pendant was obtained.

Example 2 As shown in FIG. 3, the heart-shaped pure silver clay molded body 1 prepared in Example 1 was buried shallowly in the alumina powder of a ceramics dish 3 filled with alumina powder. When a gas burner flame 2 was applied to the alumina powder for 15 minutes and heated using a normal gas burner, the firing was completed, and a heart-shaped pure silver pendant was obtained.

Example 3 Diameter: 1 at two opposing sides of the side wall as shown in FIG.
0 mm opening 7 is provided, inner diameter: 50 mm, height: 20 m
An unglazed container 9 having a thickness of 25 mm provided with a sintering space 8 having a space having a dimension of m is prepared, and the heart-shaped pure silver clay molded product 1 prepared in Example 1 is provided in the unglazed container 9.
Was charged. Thereafter, the unglazed lid 11 having a peephole 10 having a diameter of 15 mm is put on the container 9 and the gas burner flame 2 is sprayed from the opening 7. When the molded body 1 was heated, the firing of the heart-shaped pure silver clay molded body 1 was completed, and a heart-shaped pure silver pendant was obtained.

Example 4 A hemispherical pure silver clay molded body 1 ′ as shown in FIG. 6 was prepared, and this hemispherical pure silver clay molded body 1 ′ was placed on a stainless steel net 13. 13, while applying a weak gas burner flame 2 ′ from below, applying a gas burner flame 2 from above the hemispherical pure silver clay molded article 1 ′ and visually observing the sintering state while observing the firing state visually. After heating ´
The calcination of the pure silver clay molded body 1 'was completed without producing a molten portion, and a pure silver hemisphere was obtained.

[0020]

According to the method for firing noble metal clay of the present invention, a maker can easily and easily fire a small number of precious metal clay moldings by himself to produce a noble metal decorative article.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a method for firing a noble metal clay of the present invention.

FIG. 2 is a perspective view showing a method for firing a noble metal clay of the present invention.

FIG. 3 is a cross-sectional view showing a method for firing a noble metal clay of the present invention.

FIG. 4 is a cross-sectional view illustrating a method for firing a noble metal clay of the present invention.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a perspective view showing a method for firing a noble metal clay of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heart shaped pure silver clay molded body 1 'Hemispherical pure silver clay molded body 2 Gas burner flame 2' Weak gas burner flame 3 Insulated refractory 4 Table 5 Portable gas cylinder 6 Nozzle 7 Opening 8 Firing space 9 Insulated refractory container 10 Peephole 11 Lid 12 Ceramic powder 13 Net

Claims (6)

[Claims] 1. A method for sintering a noble metal clay, which comprises sintering a precious metal clay compact by directly applying a gas burner flame. 2. A method for sintering a noble metal clay, which comprises sintering the noble metal clay compact by directly applying a gas burner flame from above and below. 3. A precious metal clay molded body is charged into a baking space of an insulated refractory container having a lid provided with a peephole, and a gas burner flame is insulated from an opening provided in a side wall of the insulated refractory container. A method for firing a noble metal clay, comprising blowing a noble metal clay molded body by blowing into a firing space of a refractory container and equalizing the firing space. 4. A calcination of a noble metal clay, wherein the precious metal clay compact is embedded in a ceramic powder, and a gas burner flame is applied to the ceramic powder to fire the noble metal clay molded article embedded in the ceramic powder. Method. 5. The method for firing a precious metal clay according to claim 1, wherein the gas burner flame is a gas burner flame generated by using a handy type gas burner. 6. A precious metal clay firing jig comprising a heat-insulating refractory lid having a peephole and a heat-insulating refractory container having an opening in a side wall.