JP3873274B2 - Prefabricated precious metal clay baking equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an assembled precious metal clay firing apparatus that can easily fire a precious metal clay molded body and is convenient for storage.
[0002]
[Prior art]
Generally, it is 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, and this noble metal clay is commercially available. This noble metal clay is molded into a predetermined shape and dried, and then charged into a temperature-controllable electric furnace or gas furnace and heated to be fired to produce a noble metal ornament or the like. The electric furnace or gas furnace is relatively large and is difficult for the producer to prepare individually. Therefore, in recent years, a baking apparatus using a household microwave oven in which a precious metal clay molded body is placed in a baking box that absorbs microwaves and generates heat and then placed in a household microwave oven is proposed. Has been.
[0003]
However, when a household microwave oven is used as a precious metal clay firing device, it is difficult to control the temperature and the precious metal clay molded body is placed in the firing box, so the firing state cannot be observed from the outside, and precious works are mistaken. Sometimes melted. In addition, when the individual producer makes one small precious metal ornament such as a ring ornament, it is too large for a household microwave oven and is not easy to use. Must consume a lot.
[0004]
Therefore, in recent years, a method for sintering noble metal clay has been proposed in which sintering is performed by directly applying a gas burner flame to a noble metal clay molded body (see Japanese Patent Laid-Open No. 2000-80404). According to this method, the gas burner flame can freely adjust the heating power, and further, it is possible to sinter the precious metal clay molded body at any place by simply preparing a portable gas cylinder and gas stove. is there.
[0005]
[Problems to be solved by the invention]
However, the method of firing the noble metal clay molded body using the gas burner is to use the gas burner in an open state as a rule, so when trying to fire the noble metal clay molded body by heating with the flame of the gas burner. Firing work is carried out in a state where the flame of the gas burner can be seen, and fear of the gas burner is born and does not cause willingness to purchase precious metal clay. It has also been proposed to heat and fire with a flame of a gas burner in a refractory firing container, but to fire a precious metal clay molded body while moving the gas burner, while looking at the flame of the gas burner from the peephole If firing must be performed and the firing space in the refractory firing container is not large enough, the workability will be poor, and labor will be required to install a large refractory firing container. There must be enough space to store
[0006]
[Means for Solving the Problems]
Accordingly, the present inventors conducted research to develop an apparatus that has a narrowest possible firing space and is easy to store, and that can easily and easily fire precious metal clay. as a result,
(A) In order to fire the noble metal clay molded body in a narrow firing space, a fuel necessary for one firing is prepared in advance so that the flame generated by the combustion of the fuel spreads over a wide area and the combustion is completed. When firing of the precious metal clay molded body is completed, it is not necessary to secure a space for moving the gas burner, and it can be fired in a narrow firing space,
(B) The device for firing the precious metal clay molded body is designed as an assembly type. When it is used, the components are assembled to produce a firing device, and after the precious metal clay molded body is fired, it is disassembled and stored in a compact form. What should I do?
(C) A specific assembling-type firing apparatus for firing a precious metal clay molded body has a large truncated pyramid-shaped or truncated cone-shaped lower cylinder and an inclination angle that is the same as or different from the larger truncated pyramid-shaped or truncated cone-shaped lower cylinder. A small truncated pyramid or frustum-shaped upper cylinder, and a small truncated pyramid or frustum-shaped upper cylinder can be stacked on a large truncated pyramid or truncated frustum-shaped lower cylinder Alternatively, the lower end of the truncated cone-shaped upper cylinder has the same size and shape as the upper end of the large truncated pyramid-shaped or truncated cone-shaped lower cylinder, and the upper end of the larger truncated pyramid-shaped or truncated cone-shaped lower cylinder can be fitted with a net. It is better to have a structure in which air holes are provided on the side wall of the larger truncated pyramid or truncated cone
(D) The height of the small truncated pyramid or truncated cone or the smaller truncated pyramid or truncated cone divided into a plurality of ring shapes, each having a large truncated pyramid or cone When the height is equal to or less than the height of the trapezoidal lower cylinder, it becomes easier to store,
I got the knowledge such as.
[0007]
This invention has been made based on such knowledge,
(1) A large truncated pyramid-shaped lower cylinder and a smaller truncated pyramid-shaped upper cylinder having the same or different inclination angle as the larger truncated pyramid-shaped lower cylinder, and the smaller truncated pyramid-shaped upper cylinder on the large truncated pyramid-shaped lower cylinder Is a prefabricated precious metal clay firing device that has the same size and shape as the upper end of the lower truncated pyramid-shaped lower cylinder and the upper end of the larger truncated pyramid-shaped lower cylinder. Is a prefabricated precious metal clay firing device in which a net can be fitted, and an air hole is provided in the side wall of a larger truncated pyramid-shaped lower cylinder,
(2) The small truncated pyramid-shaped upper cylinder described in (1) is an assembled precious metal clay baking apparatus divided into a plurality of pieces in a ring shape,
(3) The height of the small truncated pyramid-shaped upper cylinder described in (1) above or the height of each small truncated pyramid-shaped upper cylinder divided into a plurality of ring shapes described in (2) are both large truncated pyramids Prefabricated precious metal clay firing device having a height equal to or less than the height of the cylindrical lower cylinder,
(4) A large frustoconical lower cylinder and a small frustoconical upper cylinder having the same or different inclination angle as the large frustoconical lower cylinder, and a small frustoconical upper cylinder on the large frustoconical lower cylinder The lower end of the small truncated cone-shaped upper cylinder has the same size and shape as the upper end of the larger truncated cone-shaped lower cylinder, and the upper end of the larger truncated cone-shaped lower cylinder is Is a prefabricated precious metal clay firing device in which a mesh can be fitted, and an air hole is provided in the side wall of a larger truncated cone-shaped lower cylinder,
(5) The small frustoconical upper cylinder described in (4) is an assembled precious metal clay firing device divided into a plurality of pieces in a ring shape,
(6) The height of the small truncated cone-shaped upper cylinder described in (4) or the height of each small truncated cone-shaped upper cylinder divided into a plurality of ring shapes described in (5) is a large cone. It is characterized by a prefabricated precious metal clay firing device having a height equal to or less than the height of the trapezoidal lower cylinder.
[0008]
The “pyramidal trapezoidal shape” means that the bottom includes a truncated pyramid having an arbitrary polygonal shape such as a triangle, a quadrangle, a pentagon, a hexagon, and the like, and a similar truncated pyramid.
The above-mentioned “conical shape” means that the bottom surface includes a truncated cone shape having a shape similar to a circle such as a circle or an ellipse, and a deformed truncated cone shape such as a bell shape or a bowl shape. It is.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, the assembly type precious metal clay baking apparatus of the present invention will be described in detail with reference to the drawings.
First, the precious metal clay molded body is fired using the prefabricated precious metal clay firing device comprising the upper and lower quadrangular pyramid-shaped upper cylinders, which is the most representative of the prefabricated precious metal clay firing apparatuses of the present invention. The method to do is demonstrated concretely based on drawing.
FIG. 1 is a perspective view of a prefabricated precious metal clay firing apparatus comprising a small quadrangular frustum-shaped upper cylinder 1 and a large quadrangular frustum-shaped lower cylinder 2. Air is introduced into the side wall of the large quadrangular frustum-shaped lower cylinder 2. An air hole 3 is provided. The large quadrangular pyramid-shaped lower cylinder 2 is placed on the table 4. The small quadrangular frustum-shaped upper cylinder 1, the large quadrangular frustum-shaped lower cylinder 2 and the base 4 are all made of a heat-resistant material. Although it is possible to use a heat-resistant alloy such as stainless steel as the heat-resistant material, it is preferable to use ceramics such as mullite, alumina, magnesia, zirconia, silica, ceramics, etc. Most preferable in terms of cost.
[0010]
FIG. 2 is a longitudinal sectional view taken along a line passing through the center of the air hole 3 of FIG. As shown in FIG. 2, a recess 9 is provided at the upper end of the quadrangular pyramid shaped lower cylinder 2, and the net 5 is removably fitted in the recess 9. The net 5 may be any net as long as it is excellent in heat resistance such as a metal net made of a heat-resistant alloy such as stainless steel, a net coated with a refractory on the metal net, and a ceramic net. In FIG. 2, 6 is a dish, 7 is a heating source, and 8 is a noble metal clay molded body.
[0011]
In order to fire a precious metal clay molded body using the prefabricated precious metal clay firing apparatus of the present invention, as shown in FIG. 2, a plate 6 is placed on a table 4, a heating source 7 is placed therein, After placing the truncated pyramid-shaped lower cylinder 2 on the base 4, inserting the mesh 5, placing the noble metal clay molded body 8 on the mesh 5, and then placing the truncated pyramid-shaped lower cylinder 2 on the rectangular pyramid-shaped lower cylinder 2 1 are stacked, and the heating source 7 is ignited to fire the noble metal clay molded body 8.
[0012]
The heating source 7 may be any gas cylinder, alcohol lamp, gas burner, solid alcohol fuel, or the like. However, when the gas source, the alcohol lamp, and the gas burner are used for heating, the height of the quadrangular pyramid-shaped lower cylinder 2 is increased. If this is not ensured, the flame is too close to the noble metal clay molded body 8, and the hottest part of the flame does not hit the noble metal clay molded body 8, and soot adheres to the noble metal clay molded body 8. When a gas cylinder, an alcohol lamp, or a gas burner is used as the heating source 7, the height of the quadrangular pyramid-shaped lower cylinder 2 is required to be 70 mm or more. Requires storage space.
Therefore, as the heating source 7, it is most preferable to use a solid alcohol fuel that can be heated even if the height of the quadrangular truncated pyramid lower cylinder 2 is low. The solid alcohol fuel used as the heating source 7 is preferably processed into a block having a large flat area with a low height. When this shape of solid alcohol fuel block is used as a heat source, it is sufficient that the height of the quadrangular pyramid shaped lower cylinder 2 is 50 mm. Also, a solid alcohol fuel block large enough to be fired by the precious metal clay molded body 8 is placed in the pan 6, and the size of the solid alcohol fuel block is preliminarily set so that the burning is completed when burned out. Is preferably calculated in advance. Solid alcohol fuel is easy to post-process because there is almost no residual soot such as ash.
[0013]
After firing the precious metal clay molded body, as shown in the cross-sectional view of FIG. 3, the square pyramid-shaped upper cylinder 1 is placed in the space of the quadrangular pyramid-shaped lower cylinder 2 to make it compact, and the storage room in a narrower space Can be stored. Even if the height of the quadrangular frustum-shaped upper cylinder 1 is higher than the height of the quadrangular frustum-shaped lower cylinder 2, it can be stored compactly, but the height of the quadrangular frustum-shaped upper cylinder 1 is quadrangular frustum-shaped. If it is higher than the height of the lower cylinder 2, it is necessary to transfer the net 5 onto the platform 4, which takes time. Therefore, it is preferable that the height of the quadrangular frustum-shaped upper cylinder 1 is equal to or less than the height of the quadrangular frustum-shaped lower cylinder 2.
[0014]
Furthermore, in the assembled precious metal clay firing apparatus, when the height of the quadrangular frustum-shaped upper cylinder 1 needs to be higher than the height of the quadrangular frustum-shaped lower cylinder 2, as shown in the sectional view of FIG. The quadrangular frustum-shaped upper cylinder is divided into two to produce the quadrangular frustum-shaped upper cylinders 1 ′ and 1 ″, and when the precious metal clay molded body is fired, as shown in the cross-sectional view of FIG. The trapezoidal upper cylinders 1 ′ and 1 ″ can be stacked and placed in the space of the quadrangular pyramid-shaped lower cylinder 2 for compact storage. The division of the quadrangular pyramid shaped upper cylinder is not limited to two divisions as shown in FIG. 4, and can be divided into a plurality of divisions such as three divisions and four divisions. 4 and 5 are the same as those in FIGS. 1 to 3 except for the quadrangular frustum-shaped upper cylinders 1 ′ and 1 ″, and the description of the other symbols in FIGS. 4 and 5 is omitted. .
[0015]
The assembly type noble metal clay firing apparatus of the present invention comprising the small quadrangular truncated cone upper cylinder and the large quadrangular truncated cone lower cylinder has been described above, but the assembly type noble metal clay firing apparatus of the present invention has a small quadrangular truncated cone shape on the top. It is not limited to a cylinder and a large quadrangular frustum-shaped lower cylinder, but may be a small pyramid-shaped upper cylinder and a large truncated pyramid-shaped lower cylinder made of an arbitrary polygon such as a triangle, pentagon, hexagon, and so on. The small truncated pyramid-shaped upper cylinder and the large truncated pyramid-shaped lower cylinder preferably have the same inclination angle. However, as shown in FIG. 6, the small truncated pyramid-shaped upper cylinder 1 and the large truncated pyramid-shaped lower cylinder 2 The shape may be a truncated pyramid having a different inclination angle. The upper end opening 10 of the small truncated pyramid-shaped upper tube 1 serves as exhaust.
[0016]
Furthermore, as shown in FIG. 7, the assembled precious metal clay firing apparatus of the present invention comprises a large truncated cone-shaped lower cylinder and a small truncated cone-shaped upper cylinder 11 having the same inclination angle as the large truncated cone-shaped lower cylinder. Therefore, it may have an assembly-type structure in which the small truncated cone upper cylinder 11 can be stacked on the large truncated cone lower cylinder 12. The small truncated cone upper cylinder 11 constituting the precious metal clay baking apparatus of the present invention is divided into two parts 11 ′ and 11 ″, but it is not necessary to divide as shown in FIG. The small truncated cone-shaped upper cylinder 11 constituting the prefabricated precious metal clay firing apparatus of the invention is a small truncated cone-shaped upper cylinder 11 having an inclination angle different from that of the large truncated cone-shaped lower cylinder 12, as shown in FIG. There may be.
[0017]
Further, as shown in FIG. 9, the small truncated cone-shaped upper cylinder 11 placed on the large truncated cone-shaped lower cylinder 12 constituting the prefabricated precious metal clay firing apparatus of the present invention is like a bowl or a bell. The upper part may have a curved shape.
[0018]
Although the internal structure of the prefabricated precious metal clay firing apparatus of the present invention consisting of a large truncated cone-shaped lower cylinder and a small truncated cone-shaped upper cylinder shown in FIGS. 7 to 9 is not shown, it is shown in FIGS. It is the same as the internal structure of the prefabricated precious metal clay firing apparatus of the present invention consisting of a large truncated pyramid-shaped lower cylinder and a small truncated pyramid-shaped upper cylinder, and a recess is provided at the upper end of the truncated cone-shaped lower cylinder. The mesh is removably fitted, and this mesh can be any mesh as long as it is excellent in heat resistance, such as a wire mesh made of a heat-resistant alloy such as stainless steel, a mesh coated with a refractory on the wire mesh, or a mesh made of ceramics. It may be.
[0019]
Further, in order to fire the precious metal clay molded body using the assembled precious metal clay firing apparatus of the present invention consisting of a large truncated cone-shaped lower cylinder and a small truncated cone-shaped upper cylinder, a dish is placed on the table 4, Place the heating source on the top, place the truncated cone-shaped lower cylinder on the platform 4, fit the mesh, place the precious metal clay molding on the mesh, and then place the truncated cone-shaped upper cylinder on the truncated cone-shaped lower cylinder. Then, the precious metal clay molded body is fired by igniting the heating source.
[0020]
Further, in the assembly type precious metal clay firing device, when the height of the truncated cone-shaped upper cylinder 11 needs to be higher than the height of the truncated cone-shaped lower cylinder 12, as shown in the perspective view of FIG. The trapezoidal upper cylinder is divided into two to produce the truncated cone-shaped upper cylinders 11 ′ and 11 ″, and when the precious metal clay molded body is fired, the truncated cone-shaped upper cylinders 11 ′ and 11 ″ are overlapped to form a lower truncated cone shape. It can be stored compactly in the space of the cylinder 12.
[0021]
Example As shown in FIG. 4, the lower end is a square with a length of 60 mm and the width is 60 mm, the upper end is a square with a length of 45 mm and a width of 45 mm, the height is 40 mm, and the thickness is 6 mm. A square frustum-shaped upper cylinder 1 ',
A square pyramid-shaped upper cylinder 1 "having a lower end of a square of 95 mm and a width of 95 mm, an upper end of a square of 60 mm and a width of 60 mm, a height of 40 mm and a thickness of 6 mm, The lower end 2 is a square of 120 mm and the width is 120 mm, the upper end is a square of 95 mm and the width is 95 mm, the height is 40 mm, and the thickness is 6 mm. Each was made of mullite.
[0022]
Next, a commercially available pure silver clay is molded and dried to produce a pure silver clay molded body 8 having a length of 25 mm, a width of 20 mm, and a thickness of 3 mm, and this pure silver clay molded body has a quadrangular pyramid as shown in FIG. It is placed on a 12-mesh stainless steel net 5 fitted in the recess 9 at the upper end of the trapezoidal lower cylinder 2, and a block of solid alcohol fuel 7 having a diameter of 40 mm and a height of 20 mm is ignited to flame. Was applied to the pure silver clay molded body 1 and heated to start firing. When the solid alcohol fuel 7 was burned out, the pure silver clay molded body was taken out and examined whether or not it was fired. As a result, the firing was sufficiently performed.
[0023]
【The invention's effect】
According to the prefabricated precious metal clay firing apparatus of the present invention, a manufacturer can easily and easily fire a small number of precious metal clay compacts individually and produce precious metal ornaments. This is convenient because the baking apparatus can be stored in a narrow space.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an assembled precious metal clay firing apparatus according to the present invention.
FIG. 2 is a cross-sectional view of the prefabricated precious metal clay firing apparatus of the present invention.
FIG. 3 is a cross-sectional view of the assembled precious metal clay baking apparatus according to the present invention.
FIG. 4 is a cross-sectional view showing the prefabricated precious metal clay firing apparatus of the present invention.
FIG. 5 is a cross-sectional view of the assembled precious metal clay baking apparatus according to the present invention.
FIG. 6 is a perspective view showing an assembled precious metal clay firing apparatus according to the present invention.
FIG. 7 is a perspective view showing an assembled precious metal clay firing apparatus according to the present invention.
FIG. 8 is a perspective view showing the prefabricated precious metal clay firing apparatus of the present invention.
FIG. 9 is a perspective view showing the prefabricated precious metal clay firing apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Square-pyramidal upper cylinder 1 'Square-pyramidal upper cylinder 1 "Square-pyramidal upper cylinder 2 Square-pyramidal lower cylinder 3 Air hole 4 units 5 Nets 6 Plates 7 Heating source 8 Silver clay molding 9 Depression 10 Opening 11 Frustum-shaped upper cylinder 11 'Frustum-shaped upper cylinder 11 "Frustum-shaped upper cylinder 12 Frustum-shaped lower cylinder

Claims (7)

A large truncated pyramid-shaped lower cylinder and a smaller truncated pyramid-shaped upper cylinder having the same or different inclination angle as the large truncated pyramid-shaped lower cylinder, and stacking the smaller truncated pyramid-shaped upper cylinder on the large truncated pyramid-shaped lower cylinder An assembly-type precious metal clay firing apparatus that has a lower end of a small truncated pyramid-shaped upper cylinder having the same size and shape as an upper end of a large truncated pyramid-shaped lower cylinder, and a mesh at the upper end of the large truncated pyramid-shaped lower cylinder. A prefabricated precious metal clay baking apparatus characterized in that it can be fitted, and an air hole is provided in a side wall of a larger truncated pyramid-shaped lower cylinder. 2. The prefabricated precious metal clay baking apparatus according to claim 1, wherein the small truncated pyramid-shaped upper cylinder is divided into a plurality of pieces in a ring shape. The height of the small truncated pyramid-shaped upper cylinder according to claim 1 or the height of each of the smaller truncated pyramid-shaped upper cylinders divided into a plurality of ring shapes according to claim 2 is the height of the large truncated pyramid-shaped lower cylinder. A prefabricated precious metal clay firing apparatus characterized by having a height equal to or less than the height. A large truncated cone-shaped lower cylinder and a small truncated cone-shaped upper cylinder having the same or different inclination angle as the large truncated cone-shaped lower cylinder, and stacking the smaller truncated cone-shaped upper cylinder on the large truncated cone-shaped lower cylinder The lower end of the small truncated cone-shaped upper cylinder has the same size and shape as the upper end of the larger truncated cone-shaped lower cylinder, and the upper end of the larger truncated cone-shaped lower cylinder has a mesh. A prefabricated precious metal clay baking apparatus characterized in that it can be fitted, and an air hole is provided in a side wall of a larger truncated cone-shaped lower cylinder. 5. The prefabricated precious metal clay baking apparatus according to claim 4, wherein the small truncated cone upper cylinder is divided into a plurality of pieces in a ring shape. The height of the small truncated cone-shaped upper cylinder according to claim 4 or the height of each of the small truncated cone-shaped upper cylinders divided into a plurality of ring-shaped shapes according to claim 5 is that of the large truncated cone-shaped lower cylinder. A prefabricated precious metal clay firing apparatus characterized by having a height equal to or less than the height. The large truncated pyramid-shaped lower cylinder according to claim 1, 2, and 3, the smaller truncated pyramid-shaped upper cylinder, the small truncated pyramid-shaped upper cylinder divided into a plurality of ring shapes, and the large cone according to claims 4, 5, and 6. A prefabricated precious metal clay firing apparatus, wherein the trapezoidal lower cylinder, the small truncated cone-shaped upper cylinder, and the small truncated cone-shaped upper cylinder divided into a plurality of pieces are made of a refractory material.

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