JPH0680442A - Production of patterned reinforced plate glass - Google Patents

Abstract

PURPOSE:To provide a highly safe plate glass not lowered in its strength with its pattern. CONSTITUTION:For the production of the reinforced plate glass having a pattern, plate glass having a thickness of at least 3mm is used, and the pattern is engraved on the surface of the plate, while leaving the minimum limit thickness of 2.5mm. The plate glass having the depressions formed by the engraving is delivered into an oven and heated at the softening temperature of the glass to melt the engraved rough surface of the plate glass, thus forming a matte reinforced coating film thereon.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a tempered flat glass having a pattern.

[0002]

2. Description of the Related Art A method for producing colored tempered glass by engraving letters, patterns, etc., having a grain trace pattern by a hard sand hammering method or engraving means such as hand engraving on a plate glass and applying a coloring chemical to it Has been proposed by the inventor of the above, and has already become a known fact (Japanese Patent Publication No. 2-36537).

The method of the present invention is characterized in that the plate glass on which a pattern is formed by engraving is heated and adjusted at a temperature near its softening point, and the engraved surface is brought into contact with it. The rough surface destroyed by the engraving is heat treated. The inventor of the present invention discovered that rehabilitation can be performed by the above method, and was established based on the discovery.

However, when a non-colored reinforced sheet glass with a pattern is produced by using the method of the above-mentioned invention, good results may not always be obtained depending on the thickness of the sheet glass and the depth of the engraved surface. For example, after engraving on a plate glass with a plate thickness of 5 mm, if the thickness of the remaining portion is less than 2.5 mm, distortion may occur on the opposite surface that is not engraved, and the plate thickness is 3 mm.
It has been found that a plate glass of less than 5 causes a problem that the plate glass itself is deformed.

Patterned tempered glazing may also be used in mirrors. However, since blasting into tempered glass breaks it, the original plate for producing a patterned mirror must be ordinary glass, and a tempered mirror with a pattern could not exist in the past. When a mirror is made from ordinary flat glass on which an engraved pattern is formed and heat-treated by the method of the invention described above, the finished surface of the mirror which is gold-plated, silver-plated or copper-plated discolors or peels off, and it can be used as a mirror. Can not be.

[0006] In view of the increasing tendency of flat glass to be used in construction, the Ministry of Construction's Housing Bureau recently issued a notice called "Safety Guidelines for Housing Openings (Safety Design)". However, it goes without saying that the strength of the tempered sheet glass is lowered by the above-mentioned pattern formation. For this reason, it is the current situation that the patterned sheet glass or mirror from which the protective film is removed cannot be used particularly in a place where it comes into contact with the public.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and its object is to enhance the safety of patterned tempered glazing and eliminate the fear of strength reduction.
To be able to use it in any place.

Another object of the present invention is to make it possible to manufacture a mirror made of a tempered glass plate having a pattern. It is also an object of the invention to manufacture such a reinforced mirror from tempered glazing.

[0009]

In order to solve the above problems, the present invention uses a plate glass having a plate thickness of at least 3 mm or more to manufacture a tempered plate glass having a pattern. A pattern of concave portions with a thickness of 5 mm left is formed by engraving means, and a plate glass having a pattern of concave portions having a rough surface by the engraving is put into a blast furnace and heat-adjusted at a glass softening temperature to adjust the roughness. By taking a solubilizing action on the surface, a means for forming a reinforced coating of satin-finished skin on the rough surface is taken.

The flat glass used in the method according to the present invention is
Ordinary glass, for example, blue glass (blue plate glass) may be used.
However, the plate thickness must be at least 3 mm. The reason is that it was found that the glass plate itself having a thickness of less than 3 mm would be deformed by heating.

It has also been found that there is a similar limitation on the thickness of the remaining glass portion rather than the depth of the patterned recess. Using a soda lime glass, a heating test was conducted at 600 ° C. for 10 minutes with respect to the relationship between the plate thickness and the thickness of the remaining portion of the recess. The results are shown in the following table.

[0012]

[Table 1] In the table above, x indicates distortion on the opposite side of the recess, Δ indicates distortion on the plate glass, and ◯ indicates no abnormality. With a 2 mm plate glass, even if a 0.5 mm recess is formed and a thickness of 1.5 mm is left there, distortion occurs on the opposite side, and even if the recess is not formed, the entire plate glass will be distorted. Is. From this, whether or not the strain is generated by heating is not determined by the ratio to the plate thickness, but depends on how much remaining glass thickness is present. That is, if the remaining thickness of 3 mm or 4 mm is 1.5 mm, distortion occurs, so that it cannot be adopted, but if the thickness of 2.5 mm is left, there is no problem.

In short, in the method according to the present invention, the rough surface produced by engraving is melted, the opposite side of the concave portion is not distorted, the plate glass is not distorted, and the above three conditions are satisfied. It can be manufactured.

Furthermore, a patterned reinforced mirror can be manufactured using the patterned reinforced sheet glass manufactured in this manner. In this case, the surface of the reinforced plate glass manufactured as described above, on which the concave portion is formed, is plated with gold, silver or copper, as described above, and the back is stopped with a chemical solution such as Komeitan, Just make it a mirror.

[0015]

Embodiments will be specifically described below with reference to embodiments.

Example 1 Example of finishing to a satin-finished skin A glass plate having a thickness of 4 mm was formed on one surface with a carved engraving method to form a company emblem with a recess having a depth of 1.5 mm (residual thickness 2.5 m.
m), the flat glass having the company emblem pattern composed of the roughened concave portion is fed into the heating blast furnace by a flow method,
Heat treatment was carried out at a temperature of 20 to 630 ° C. for 10 minutes to produce a tempered flat glass having a roughened surface to the touch and a normal satin finish.

Example 2 Example of finishing with satin skin A mask with a company emblem is attached to one side of a plate glass having a plate thickness of 5 mm, and the company emblem is engraved in the punched hole by a sand blast method to a depth of 2.5 mm, Form a recess with a residual thickness of 2.5 mm,
The plate glass having the concave company emblem pattern composed of the rough surface was heated in the same furnace as in Example 1 at 630 to 650 ° C. for 12 minutes to produce a tempered plate glass having a rough surface that was a normal satin finish.

Example 3 Example of finishing thin pear skin A template with a family crest attached to one side of a plate glass having a plate thickness of 6 mm, and a depth of 3.5 mm and a residual thickness of 2.5 by tapping with hard sand.
In a furnace similar to that of Example 1, a plate glass having a concave portion having a size of mm and having a concave household crest pattern formed of the rough surface was formed at a temperature of 700.
Heat treatment was performed at ˜720 ° C. for 10 minutes to produce a tempered flat glass in which the rough surface was melted to give a smoother thin pear skin.

Example 4 Example of finishing thin pear skin A dented fluorinated chemical solution was applied to one side of a plate glass having a plate thickness of 8 mm to form a concave pattern in which a family crest was patterned to a depth of 4.5 mm and a remaining thickness of 3.5 mm, The plate glass having the concave family crest pattern formed of the rough surface was heated in the same furnace as in Example 1 at a temperature of 730 to 750.
Heat treatment was carried out at 15 ° C. for 15 minutes to produce a tempered flat glass in which the rough surface was melted to give a smooth thin pear skin.

Example 5 Example of Mirror Finishing Using the tempered reinforced glass sheet having a plate thickness of 6 mm produced according to the above-mentioned Example 3, an aqueous solution of tin-zinc oxide was applied to the surface where the recess was formed and distilled water was used. Rinse away, and then flow a mixture of an aqueous solution of silver nitrate and aqueous ammonia, an aqueous solution of potassium hydroxide and an aqueous solution of glucose onto the surface to change it to a silver surface and at the same time fix it on the original plate. Apply an alcohol solution to stop the change,
After evaporation of the alcohol, a mixed solution of casein powder and an aqueous solution of calcium lime was applied, dried, and then a coating of Komeitan and calcium lime dissolved in varnish using volatile oil was applied to produce a patterned reinforced mirror.

The structures of the reinforced sheet glass and the patterned reinforced mirror manufactured by the above method are illustrated in the drawings. FIG. 1 shows a state in which a pattern of concave portions 3 having a rough surface 2 is formed on the back surface of a soda-lime glass 1, 2 is a state in which heat treatment is applied to form a satin skin 4, and FIG. 3 shows a silver film 5 in the concave portions. The respective cross sections in the state of being manufactured and having the backing 6 are shown.

Reference numeral 7 is a protective film on the surface.
Is destroyed by the engraving of a pattern consisting of concave portions (FIG. 1), but since the reinforced skin 8 is formed along with the generation of the satin skin 4 by the heat treatment (FIG. 2), the flat glass produced by the present invention is The strength does not decrease depending on the pattern.
The protective film 7 on the surface of the plate glass also becomes the reinforcing film 8. Moreover, the patterned reinforced mirror shown in FIG. 3 exhibits exactly the same strength as the reinforced plate glass.

[0023]

EFFECTS OF THE INVENTION Since the present invention is constructed and operates as described above, even if the protective film is destroyed by engraving due to pattern formation, a strengthening film is formed by the solubilizing action in the heat treatment, and the desired strength is obtained. It is possible to manufacture a tempered glazing with a pattern and a tempered mirror with a pattern.

Therefore, the patterned reinforced plate glass and the patterned reinforced mirror manufactured by the manufacturing method of the present invention exhibit strength substantially equal to that of the reinforced plate glass that does not form a pattern and the reinforced plate glass mirror, and thus satisfy the notification of the Ministry of Construction. However, it has an effect of exhibiting sufficient performance as a plate glass and a mirror used in a place where there is an opportunity to contact the public.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a plate glass pattern portion showing a stage in the process of being manufactured by a manufacturing method according to the present invention.

FIG. 2 is a cross-sectional view of a patterned portion of tempered glass sheet manufactured by the above method.

FIG. 3 is a similar cross-sectional view of a strengthening mirror using the strengthened plate glass.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Sato 2-5-13 Chuo-cho, Ichinoseki-shi, Iwate Prefecture (72) Inventor Toshitaka Sato No. 238-1, Niimanbashi, Hanamaki-shi, Iwate 238-1

Claims (4)

[Claims] 1. A method for producing a tempered glazing having a pattern by using a glazing having a plate thickness of at least 3 mm, which comprises a recess having a minimum thickness of 2.5 mm left on the glazing surface. Is formed by an engraving means, and the plate glass having a pattern of concave portions that are roughened by the engraving is fed into a blast furnace and heat-adjusted at a glass softening point temperature to generate a solubilizing effect on the roughened surface. A method for producing a tempered glazing sheet having a pattern, which comprises forming a satin-finished reinforced coating on the surface. 2. The condition of heating adjustment is 600 to 650 ° C., 1
The method for producing a patterned tempered glazing according to claim 1, wherein it is 0 to 15 minutes, and thereby the protective coating of ordinary satin finish is regenerated. 3. The condition of heating adjustment is 700 to 750 ° C., 1
The method for producing a patterned reinforced sheet glass according to claim 1, wherein the protective film for thin pear skin having a high solubility is regenerated for 0 to 15 minutes. 4. The plate glass is a plate glass for a strengthening mirror,
2. The method for producing a tempered glazing sheet having a pattern according to claim 1, wherein after the heating and adjusting, the surface of the satin-finished skin having the protective film formed thereon is subjected to mirror surface treatment such as gold drawing, silver drawing, and copper drawing.