JP2570792B2 - Netted vitreous artificial stone and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a netted vitreous artificial stone of the present invention and a method for producing the same. In particular, it is possible to use waste glass and substitute for natural stone such as granite and various fireproof panels. The present invention relates to a netted vitreous artificial stone excellent in practicality and a method for producing the same.

[Prior art] Conventionally, when a vitreous molten material is used as a building material, particularly as an outer wall material, the purpose is to increase the strength, to prevent falling (to prevent scattering at the time of destruction), and to prevent fire from spreading in a fire. As such, netted glass sheets are known. The conventional meshed sheet glass is manufactured by inserting a wire mesh into a molten glass so as to be located substantially at the center in the thickness direction of the glass, and integrating the wire mesh and the sheet glass.

In addition, recently, a method of inserting a wire net or steel fiber therein for the same purpose has been disclosed for a crystallized glass building material which has attracted attention as a new ceramic building material (Japanese Patent Publication No. 55-3299). This method accumulates glass particles that can be crystallized when heat-treated at a temperature between the softening point and 1200 ° C, and inserts a wire mesh etc. so that it is located almost in the middle in the thickness direction during this accumulation, and crystallizes. This is a method in which a wire mesh or the like and glass are integrated by heat fusion.

Furthermore, even in low-temperature sintered glass around 800 ° C using glass powder, as in the above-mentioned crystallized glass,
There is also a method of accumulating glass powder particles, inserting a wire mesh or steel fiber or the like so as to be located at substantially the middle position or the whole in the thickness direction at the time of this accumulation, and heat-sealing to integrate the wire mesh and the glass with the glass. Proposals have been made (JP-A-47-28013, JP-A-51-988).
711).

[Problems to be Solved by the Invention] However, in these conventional glass plates into which a wire mesh or the like is inserted, glass and metal have different coefficients of thermal expansion.
In the manufacturing process, the softening point and 80
Cracking and destruction occur due to the difference between the rapid shrinkage of the glass body and the expansion of the metal up to around 0 ° C. In addition, due to the difference in thermal expansion, during thermal fusion, in the slow cooling step after heat treatment and during use, There are problems such as the occurrence of thermal cracks.

In other words, in the conventional glass plate, a wire mesh or a steel fiber is inserted into the center or the entirety of the glass plate, and the fusion and unification are performed. During use, cracking and damage occur. If such a problem is to be solved, it is necessary to use an effective Ni-Cr-based alloy having substantially the same coefficient of thermal expansion as glass as the metal of the wire mesh, which results in cost reduction. Was disadvantageous to

The present invention solves the above-mentioned conventional problems, can be manufactured at low cost without using any special alloy, and has a problem of cracking and breaking due to a difference in coefficient of thermal expansion between metal and glass. That is, it is a glass body capable of releasing the thermal expansion and shrinkage between the two to the outside, having the same or better performance as natural stone, and having the same excellent appearance as natural stone. In addition, it is an object of the present invention to provide a net-shaped vitreous artificial stone having reinforcement, fall prevention, and fire resistance, and a method for producing the same.

[Means for Solving the Problems] A vitreous artificial stone with a net according to the present invention is a vitreous artificial stone having a metal net on the surface of a glass body, and the metal net is formed on a surface of the artificial stone in a thickness direction of the metal net. Is buried in the glass body, and the rest is exposed outside the glass body.

In particular, the glass body preferably has a vitreous portion composed of a pattern portion composed of glass particles and an inorganic pigment and a matrix portion having a different color tone from the patterned portion.

The method for producing a vitreous artificial stone with a net according to the present invention is characterized in that the above-mentioned vitreous artificial stone is produced by laminating a glass powder molded body on a wire mesh and then firing and integrating the same.

 Hereinafter, the present invention will be described in detail.

In the netted vitreous artificial stone of the present invention, on the surface, a part of the wire mesh in the thickness direction is buried in the glass body, and the rest is exposed outside the glass body.

Such a glass portion of the vitreous artificial stone with a wire mesh of the present invention is disclosed in a fired body of a glass powder granule, for example, Japanese Patent Application Laid-Open No. 60-151251 filed by the present applicant. A large number of glassy islands having a large number of uniformly dispersed fine bubbles, and a large number of uniformly dispersed fine bubbles, filling around the islands, having a color tone different from the islands. It is preferably composed of a vitreous matrix. In this case, artificial stone having a beautiful appearance similar to or better than natural stone can be obtained.

In the present invention, the wire mesh is a single metal wire or a metal wire integrated by welding so that a part in the thickness direction is buried in the glass body and the remainder is exposed to the outside. In this case, a material which can be continuously or alternately buried in the thickness direction in a vitreous material is used.

Specifically, the wire mesh has a wire diameter of 0.1 to 5 mmφ, the size of the opening is 1 to 300 mm, preferably a wire diameter of 0.2 to 2.0 mmφ and the size of the opening is 5 to 30 mm. It is preferable to use a wire type wire mesh, a conveyor wire mesh, a turtle wire mesh or the like. That is, any material may be used as long as the softened glass body enters the space portion of the wire mesh, buries a part of the wire mesh in the thickness direction, and exposes the remaining portion. Therefore, if such an effect is achieved, a perforated plate such as one obtained by stacking two or three or more wire meshes or a perforated metal plate so that the opening size is 1 to 300 mm, preferably 5 to 30 mm Shaped products may be used.

When the wire diameter of the wire mesh is less than 0.1 mm, deterioration such as oxidation occurs in the heat treatment step, and when the wire diameter exceeds 5 mmφ, there are occasions where the contact area with the glass body decreases and the encapsulating force decreases. On the other hand, if the opening size is less than 1 mm, the glass body is softened and it is difficult to enclose the wire mesh. If the opening size exceeds 300 mm, the effects of reinforcement, drop prevention, fire resistance and the like cannot be sufficiently obtained. Therefore,
It is preferable that the wire diameter and the opening size of the wire mesh are in the above ranges.

The material of the wire mesh may be any of an iron wire, a stainless steel wire, a nickel wire, a galvanized wire, a hard steel wire, and the like. However, a stainless steel wire is preferable in consideration of the problem of rust in practical use, economy, and the like.

In the netted vitreous artificial stone of the present invention, if the burial depth in the thickness direction of the wire mesh is too small, the contact area between the wire mesh and the glass body cannot be sufficiently obtained, the encapsulating force is reduced, and the wire mesh has a sufficient amount. The effect of improving strength and the like cannot be obtained. However, if the wire mesh is buried too deeply, a sufficient improvement effect according to the present invention cannot be obtained. Therefore, in the present invention, the wire mesh is buried in a range of 7 mm or less from the surface of the glass body, and preferably, a portion of about 1/3 to 4/5 of the entire thickness of the wire mesh is buried. Is preferred.

Next, a method for producing such a netted vitreous artificial stone of the present invention will be described.

In the method of the present invention, glass powder is first molded to produce a glass powder molded body. As the raw material glass powder, plate glass, bottle glass, waste glass of fibrous glass and the like can be used, and additives such as inorganic additives (for example, alumina powder, silica sand, etc.) and pigments are appropriately added as necessary. ,
Mold according to the usual method. Then, the obtained molded body is overlaid on a wire net. Alternatively, glass powder is formed on a wire mesh in the same manner as described above. The raw glass powder, additives and molding method are the same as described above.

Next, the formed body superimposed on the wire net is fired.
The firing method is not particularly limited, and FIG. 1 (a)
As shown in FIG. 2, a product obtained by laminating a glass powder granule 3 on a wire mesh 2 on a shelf 1 may be fired on a shelf system 1, and a roller system may be used as shown in FIG. 2 (a). While rotating the roller 4 (or on a shelf on the roller 4), the wire mesh 2 with the glass powder compact 3 stacked thereon may be fired.

By baking in this manner, the softened glass body penetrates into the eyes of the wire mesh, and as shown in FIGS. 1 (b) and 2 (b), a part of the wire mesh 2 in the thickness direction is made of glass. body
It is possible to obtain the netted vitreous artificial stone of the present invention, which is buried and embedded in 3a and the rest is exposed.

The firing temperature is appropriately determined depending on the softening temperature of the vitreous material to be used, the firing time, the wire diameter and opening of the wire mesh, the desired degree of burial of the wire mesh, etc., but usually 800 to 1000
The temperature is about ℃.

Note that the present invention can be applied to crystallized glass, and similar effects can be obtained.

[Action] Since the net-shaped vitreous artificial stone of the present invention is such that a part of the wire mesh in the thickness direction is buried in the glass body and the remaining part is exposed, the strength and fire resistance of the wire mesh are improved. Is obtained.

II In particular, the buried portion of the wire mesh inside the glass provides the effect of preventing scattering, dissipation, and falling when the glass is broken (destruction by an earthquake, fire, flying object, etc.).

III On the other hand, the exposed portion of the wire mesh has the effect of dispersing the concentration of thermal stress due to the difference in thermal expansion coefficient between the glass body and the buried portion of the wire mesh by deforming the exposed portion. Therefore, there is no occurrence of thermal destruction due to a difference in the coefficient of thermal expansion in the temperature raising and slow cooling steps during firing.

In particular, when the glass body has a vitreous portion composed of a pattern portion composed of glass powder particles and an inorganic pigment and a matrix portion having a different color tone from the glass portion, a beautiful or similar beautiful natural stone is obtained. Artificial stone having a natural appearance can be obtained.

In addition, when ascending and descending, generally, the difference in sheet temperature of the glass molded body,
In particular, cracking may occur due to a large difference between the bottom surface temperature and the top surface temperature. However, according to the present invention, since a wire mesh is present between the IV firing shelf (or roller) and the glass body, the space is limited. In addition, the difference in sheet temperature between the upper surface and the lower surface can be further reduced by the heat transfer effect of the wire mesh itself.

For this reason, crack destruction in the firing step is also effectively prevented.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. However, the present invention is not limited to the following Examples as long as the gist of the present invention is not exceeded.

Example 1 Float glass waste (weight composition SiO ₂ : 71.2%, Al
₂ O ₃ : 1.4%, CaO: 9.0%, MgO: 3.9%, Na ₂ O: 13.5%, K ₂ O:
1.0%, yield point: 615 ° C., softening point: 730 ° C.) and sieved to obtain particle sizes of 1680 to 840 μm, 840 to 297 μm, and 297 to 177.
μm, 177 to 105 μm glass powder particles each 15% by weight, and 105
40% by weight of glass powder particles having a size of not more than μm were mixed. 1 of them
10% was used for pattern formation, and 5% of TiO ₂ powder was added thereto and mixed. On the other hand, the remaining mixed glass powder was granulated with a pan-type granulator while spraying water, and then the colored glass powder for pattern formation was sprinkled. The glass granules thus obtained were filled in a mold on a shaking table and then molded. After releasing from the mold and drying, it was placed on a wire mesh on a firing shelf plate and fired.
As the wire mesh, a 2-mesh plain-woven wire mesh having a wire diameter of 0.9 mmφ and an opening size of 11.8 mm was used. Sintering is carried out using an electric furnace, the temperature is raised to 800 ° C. at a rate of 5 ° C./min.
The temperature was gradually cooled at 1.5 ° C./min from 500 ° C. to normal temperature at 3 ° C./min. Thereafter, the surface opposite to the wire net was polished to obtain a net-shaped vitreous artificial stone of the present invention.

The resulting artificial stone had a wire mesh with a thickness of 0.5 mm in the thickness direction buried in the glass and the remainder exposed, and had a beautiful pattern without crack breakage in the manufacturing process. .

When the obtained vitreous artificial stone with a net was tested in accordance with Article 2, Item 6 of the Building Standards Act, it was confirmed that the artificial stone had satisfactory characteristics without scattering and falling.

Example 2 Using glass powder having the same composition as in Example 1,
840 μm powder 10% by weight, 840-297 μm powder 5% by weight, 297-177 μm powder 5% by weight, 177-105 μm powder
15% by weight, 50% by weight of powder particles having a particle size of 105 μm or less and 15% by weight of silica sand (having an average particle size of 70 μm) were mixed and molded in the same manner as in Example 1 by adding an inorganic pigment. After releasing from the mold and drying, it was placed on a wire mesh on a firing shelf plate and fired. Wire mesh is wire diameter 0.4mm
Two pieces of welding wire mesh having a diameter of φ and an opening size of 18 mm were installed so that the openings did not overlap.

In the firing, the temperature was increased to 550 ° C. at a rate of 5 ° C./min, and then to 800 ° C. at a rate of 1 ° C./min. The subsequent temperature conditions were the same as in Example 1.

The glass-made artificial stone with mesh obtained in this way is such that 0.4 mm in the entire thickness direction of the wire mesh is buried in the glass and the remainder is exposed. A test was conducted in accordance with Article 2, Item 6 of the law, and it was confirmed that the particles had satisfactory properties without scattering and falling. Also, in the falling ball test based on JIS R-3206, no glass was scattered at the time of breaking.

Example 3 The same vitreous powder as in Example 2 comprising a glass powder and an admixture such as a pigment was placed on a wire mesh placed on a firing roller having a diameter of 63.5 mm and a pitch of 100 mm, and the roller was rotated. Then, they were sequentially fed to a predetermined temperature range and fired. The wire mesh used was a conveyor wire mesh having a wire diameter of 0.9 mmφ and a mesh size of 3 mm. The firing temperature was set to be the same as in Example 1.

In the vitreous artificial stone obtained in this way, part of the wire mesh (2 mm) is buried in the vitreous, and the rest is exposed.
There was no crack destruction at the time of manufacture, and it had a beautiful pattern. Also, Article 2-6 of the Building Standards Law and JIS R-320
In the test based on No. 6, the glass did not fall and scatter, and had satisfactory properties.

Comparative Example 1 A vitreous granule prepared and granulated in the same manner as in Example 1 was filled on a vibrating table, and a wire mesh was inserted so as to be located substantially at the center of the vitreous granule immediately before stopping vibration. Was. The molded body thus obtained was placed on a firing shelf plate on which a release agent was applied, and fired in the same manner as in Example 1. (At this time, the wire mesh was not placed on the shelf.) After firing, when taken out and observed, the glass body had vertical and horizontal cracks,
The wire mesh that should have been completely inserted into the glass body is exposed,
A satisfactory plate could not be obtained.

[Effects of the Invention] As described in detail above, the netted vitreous artificial stone of the present invention has a wire mesh on the surface of a glass body, and the wire mesh has a surface in the artificial stone where a part of the wire mesh in the thickness direction is glass. It is buried in the body and the rest is exposed outside the glass body. It has high fire resistance, strength, etc., and has remarkably excellent fall prevention performance.

During production or use, crack destruction due to the difference in the coefficient of thermal expansion between the glass and the wire mesh hardly occurs.

An aesthetic appearance equal to or better than that of natural stone can also be provided.

 Effective use of waste glass as a raw material.

It is an artificial stone which has such effects, is low in cost, has high characteristics, and is excellent in practicality as a building material.

In the present invention, it is particularly preferable that the glass body has a vitreous portion composed of a pattern portion composed of glass powder particles and an inorganic pigment, and a matrix portion having a different color tone.

Thus, such a vitreous artificial stone with a net of the present invention can prevent crack destruction and the like at the time of manufacture by the manufacturing method of the present invention in which a glass powder compact is superposed on a wire mesh and then fired and integrated. , And can be efficiently manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a bogie type firing method,
(A) shows the state during firing, and (b) shows the state after firing. FIG. 2 is a cross-sectional view showing a baking method of a roller system, and FIG.
The figure shows the state during firing, and the figure (b) shows the state after firing. DESCRIPTION OF SYMBOLS 1 ... shelf board, 2 ... wire mesh, 3 ... glass powder compact, 4 ... roller

Continued on the front page (72) Inventor Masayuki Takeda 4-8 Doshomachi, Higashi-ku, Osaka City, Osaka Inside Nippon Sheet Glass Co., Ltd. (72) Inventor Isamu 4-8, Doshomachi, Higashi-ku, Osaka City, Osaka Nippon Sheet Glass Co., Ltd.

Claims (3)

(57) [Claims] 1. A vitreous artificial stone having a wire mesh on the surface of a glass body, wherein the wire mesh is partially buried in the thickness direction of the wire mesh on the surface of the artificial stone, and the remainder is outside the glass body. Visible glass artificial stone characterized by being exposed. 2. A vitreous material according to claim 1, wherein said glass body has a vitreous portion comprising a pattern portion comprising glass powder particles and an inorganic pigment and a matrix portion having a color tone different from said pattern portion. Artificial stone. 3. A vitreous artificial stone having a wire mesh on the surface of a glass body by firing and integrating the glass powder compact on a wire mesh after superimposing the glass powder compact on the wire mesh. A method for manufacturing a vitreous artificial stone, comprising manufacturing a vitreous artificial stone in which a part of a wire mesh in a thickness direction is buried in a glass body and a remainder is exposed outside the glass body.