JP5605822B2 - Cover glass and manufacturing method thereof - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a cover glass formed by a plurality of glass layers, and more specifically, a cover glass in which an opal color is given to a cover glass in which a plurality of glass layers are covered, and the glass It relates to a manufacturing method.

  2. Description of the Related Art Conventionally, as an arts and crafts product using glass, there is one that is a cover glass in which a plurality of glass layers are superposed (Non-Patent Document 1, etc.). Below, the covering glass and its manufacturing method are demonstrated using FIG.

  In FIG. 1, the code | symbol 1 is the cover glass superimposed on the several layer. In FIG. 1, 11 is a first glass layer, 12 is a second glass layer, and FIG. 13 is a third glass layer. Although these glass layers will be described in the case of three layers in FIG. 1, the thickness of the layers may be four or more. When forming such a cover glass 1, first, as shown in FIG. 3, a plurality of crucibles 21, 22... Are prepared, and different types of glasses 10 a, 10 b are melted in the crucibles 21, 22. . Then, when forming the cover glass 1, the tip 31 of the bowl 3 is put in the first crucible, the glass 10 a is wound around the tip 31 of the bowl 3, and the glass is expanded by air blowing. Then, after the glass is swelled to a desired size such as a vase, tableware, or a figurine, this swelled cover glass 11 is put in the next crucible 22 to attach a different colored glass 10b, and again. The glass is blown up by air blowing. And the covering glass 1 covered by the multiple layers is formed by repeating such an operation many times. Finally, a pattern 6 is applied to the surface by sandblasting 5 or a color pattern can be applied by changing the thickness of the glass layer.

http://www.atelier-pigeon.com/glass/yougo.htm (Refer to “Glass craft type: Covered glass”) February 1, 2009 confirmation

  In recent years, not only such colored glass but also a white to translucent glass layer is provided on the surface to give a pattern.

  As such white to translucent glass, there are glasses called “Gyoku”, “Alabaster”, and “Opal” in order of increasing transparency. Among these, “Gyok” is a product that has a pure white color like pottery by making many fluoride crystals turbid as shown in FIG. 2 (a). "", As shown in FIG. 2 (b), a combination of barium sulfate and fluoride (such as calcium fluoride) is used to give a little transparency. Note that the circles in the figure represent crystals, and the darker the density, the lower the transparency and the white color. On the other hand, “opal” has the structure shown in FIG. 2 (c), and a small amount of a neighboring compound such as calcium phosphate is added to the glass so that the color tone is changed depending on the condition of the light and the viewing angle. is there. This opal glass is said to have a function of changing the color tone when the size and density of crystals formed by the adjacent compound in the glass are close to the wavelength of light.

  By the way, when such a gok or alabaster is used, the design can be made with a white or translucent hue. However, when the opal glass is used, the following problems occur.

  That is, in general, glass such as gokky, alabaster, opal, etc., changes in density depending on the temperature and time of heat treatment, so even if the composition is the same, the transparency changes depending on how heat is applied during molding. End up. Specifically, when the glass is gradually heated, it changes to white in the order of FIG. 2 (c) to FIG. 2 (b) and FIG. 2 (a). The body melts and becomes transparent in the order of FIG. 2 (a), FIG. 2 (b), FIG. 2 (c). It is also known that the color changes depending on the cooling method.

  By the way, under such a state, when the opal glass is covered and reheating is repeated, the crystals in the glass become non-uniform due to repeated reheating and cooling. It becomes transparent and has no opal color. For this reason, in the case of using opal glass for the inner layer, there is a problem that the temperature control is very difficult and the yield is deteriorated.

  Therefore, the present invention has been made paying attention to the above problems, and even when using opal glass for the cover glass, the cover glass capable of producing the original color of the opal glass and its manufacture It aims to provide a method.

That is, in order to solve the above-mentioned problems, the present invention provides a method for producing a cover glass comprising a plurality of glass layers, and a step of blowing the first glass melted in a crucible by air blowing, Covering the second glass melted on the surface of the first glass which has been melted and air blowing again, and covering the third glass outside the second glass and air air again And a step of melting and covering the opal glass containing silicon dioxide, aluminum oxide, and phosphate in the outermost layer of the third glass layer or the further coated glass layer, and the covering glass that is covered The cover glass is manufactured by a process of grinding by sandblasting.

  In this way, since the opal glass layer is provided as the outermost layer, heating and cooling can be completed only once, and furthermore, there is nothing in the upper layer, so temperature management can be facilitated. it can. For this reason, heating and cooling can be performed so as to have an opal color, and the yield can be improved.

  In the present invention, since the opal glass is covered with the outermost layer of the cover glass that has been covered with many layers, the heating and cooling of the opal glass can be performed only once, so that the temperature management is easy. Will be able to do. Thereby, it can heat and cool so that it may have an opal color, and can improve a yield.

A diagram showing the general structure of the cover glass Illustration showing crystals of gok, alabaster, opal glass The figure which shows the laminated structure of the cover glass in one embodiment of this invention The figure which shows the manufacturing process of the covering glass in the same form The figure which shows the finished product of the covering glass in the same form

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The cover glass 1 in the present embodiment is used as arts and crafts such as vases, tableware, and figurines, and a plurality of glass layers 11, 12, and 13 formed by repeating the cover and air blowing. Further, a glass layer 14 made of opal glass 14 is provided on the outermost layer so as to have an opal color.

  The glass layers 11 to 14 of the cover glass 1 are made of a plurality of relatively transparent glass materials, and are formed of, for example, a colorless transparent to colored transparent glass material. At this time, preferably, if the inner layer is a very dark glass material, it is difficult to see the glass color even if a light glass layer is formed on the outer side. It may be formed of a relatively transparent glass material. However, since the hue changes depending on the color density and the thickness of the glass layer, the inner glass layer may be darkened and the outer glass layer may be lightened. In this embodiment, since the case-like glass cover 1 such as a vase is described as an example, the hollow part of the glass cover 1 is the inside and the outer layer part is the outside. In the case of forming the dish-shaped cover glass 1, the present invention may be applied by interpreting either the upper surface or the lower surface as the inner side or the outer side.

  When making the glass cover 1 with the glass layers 11 to 14, a plurality of crucibles 21 and 22 as shown in FIG. 3 are prepared, and different types of glass materials are melted in the crucibles 21 and 22. . At this time, the temperature of the melted glass material in each of the crucibles 21 and 22 is set to a temperature at which the glass material can be appropriately expanded by air blowing. Then, after melting the glass material at such a temperature, the glass material is attached in a ball shape to the tip 31 of the hollow bowl 3 and is blown from the bowl 3 while rotating, thereby rotating the bowl 3 A hollow primary molded product 100 is formed.

  Next, in order to form the second glass layer 12 on the outer layer of such a primary molded product 100, a glass material is melted in the second crucible 22, and the primary molded product 100 is attached thereto and reheated. To do. And it blows up again by air blowing, and forms the glass secondary molded product 101 which was covered. Here, the primary molded product 100 is dipped in the second crucible 22 and the surface is covered with a glass material. However, separately from this, the entire surface of the primary molded product 100 in an inflated state is poured from above. It may be covered like this. When the glass material is attached to the surface, the glass material may be partially frosted instead of attaching the glass material to the entire surface in this way.

  By the way, when glass material is made to adhere to the surface of the primary molded product 100, if the temperature of the glass material is low and the viscosity is high, the expanded primary molded product 100 may be deflated. For this reason, about the glass material to coat, it is good to set temperature high and to make viscosity low. At this time, the temperature is set equal to or slightly higher than the melting temperature of the glass material in the first crucible 21. Thereby, the glass material of the primary molded product 100 is reheated by the temperature of the glass material in the melted second crucible 22, and can be expanded again from the inside by air blowing.

  Similarly, for the glass layers after the third glass layer 13, the intermediate molded product 1 a swelled in a third crucible (not shown) is soaked to cover the glass material, and swelled again by air blowing. And cover it.

  By the way, if reheating, cooling, and air blowing operations are performed many times in this way, the inner glass layer may be reheated, and distortion or crystals may remain in the glass layer. In particular, for a material having a high crystal density dependency, such as the opal glass 14, temperature management becomes difficult by repeating reheating, and there is a high possibility that an opal color will not be emitted.

  Therefore, the opal glass layer 14 is formed in the outermost layer of the intermediate molded product 1a thus formed so that heating and cooling can be easily managed.

  As this opal glass 14, a glass that develops an opal color in an optimal heating state is used. Generally, a glass that contains silicon dioxide as a main component and contains aluminum oxide, phosphate, and other components is used. Here, other components include alkaline earth oxides, alkali metal oxides, metal fluorides, fluorine, and other hydrated metal oxides such as BeO, MgO, CaO, ZnO, SrO, CdO, BaO, etc. Use thing including thing. As for these opal glasses 14, for example, U.S. Pat. No. 2,224,469, U.S. Pat. No. 2,921,860, U.S. Pat. No. 1,289,185, JP-A-53-125418, and JP 63-54655, Japanese Patent Publication No. 03-72584, etc., and any of these opal glasses may be used.

  When the opal glass 14 is covered on such an intermediate molded product 1a, as in the case of forming the intermediate molded product 1a, the opal glass 14 is put in a melted state in a crucible and is expanded in the crucible. The intermediate molded product 1a is attached. At this time, when the opal glass 14 is maintained at a constant temperature above the softening point, a crystal is generated, and when maintained at a high processing temperature for a long time, the crystal increases and becomes white. On the other hand, if the processing temperature is raised too much, the opal glass 14 will be in a molten state, and the crystal will disappear and become transparent. For this reason, the opal glass 14 is preferably covered in a state of being heated at about 700 degrees for about 2 hours. Then, in the same manner, the hollow covering glass 1 having a desired size is formed by blowing air while rotating the basket 3 in a state of covering the intermediate molded product 1a.

  Then, the cover glass 1 in a softened state is removed from the basket 3 and deformed into a desired shape such as a vase or tableware using a tool.

  Next, after the intermediate shaped product 1a having a predetermined shape is generated and cooled in this way, a pattern is formed by the sandblast 5 so as to give a pattern 6 as shown in FIG. When patterning is performed with the sand blast 5, only the pattern portion to be left is masked, and abrasive powder is sprayed at high pressure in the sand blaster to grind portions other than the pattern. Finally, masking is removed, the pattern is extracted, and finally the surface glass is polished to form the covering glass 1 that is an arts and crafts.

As described above, according to the above-described embodiment, the glass layer 11 , 12 , 13 composed of a plurality of layers is covered to form the intermediate molded product 1a, and the opal glass 14 is covered to the outermost layer. The opal glass 14 can be heated and cooled once, and the opal glass 14 can be covered so as to emit an opal color because the temperature can be easily controlled.

  In addition, this invention is not limited to the said embodiment, It can implement in a various aspect.

  For example, in the above embodiment, the opal glass layer 14 is formed as the outermost layer. However, the opal glass 14 is not only partially covered with the entire surface of the intermediate molded product 1a but also partially covered with frosting. It may be provided. Moreover, you may attach to an outer side like a handle.

  In the above embodiment, the opal glass 14 is provided only on the outermost layer of the intermediate molded product 1a. However, after the intermediate molded product 1a is formed, the opal glass 14 is provided on the innermost layer later. Also good.

  Furthermore, in the above embodiment, vases, tableware, figurines, etc. have been described. However, the present invention is not limited to this, and any object that can be used for appreciation, such as a hanger or stained glass, can be used. Also good.

  The present invention can be applied to arts and crafts and practical items that are appreciated and used, such as vases, tableware, figurines, hangings, and stained glass.

DESCRIPTION OF SYMBOLS 1 ... Cover glass body 1a ... Intermediate molded product (100: Primary molded product, 101: Secondary molded product)
DESCRIPTION OF SYMBOLS 11 ... 1st glass layer 12 ... 2nd glass layer 13 ... 3rd glass layer 14 ... Opal glass (layer)
2 ... Crucible (21: first crucible, 22: second crucible)
3 ... 竿 31 ... tip 5 ... sandblast 6 ... pattern 10a, 11a ... melted glass material

Claims (2)

In the manufacturing method of the covering glass formed by covering a plurality of glass layers,
A step of blowing the first glass melted in the crucible by air blowing,
Covering the melted second glass on the surface of the swollen first glass and blowing it again;
Covering the outside of the second glass with the third glass and blowing it again;
Melting and coating opal glass containing silicon dioxide, aluminum oxide, and phosphate on the outermost layer of the third glass layer or the further coated glass layer ;
And a step of grinding the covered glass by sandblasting. In the cover glass formed by covering a plurality of glass layers,
A first glass layer formed by air blowing,
A second glass layer coated on the outer layer of the first glass layer;
A third glass layer coated on the outer layer of the second glass layer;
An opal glass layer comprising silicon dioxide, aluminum oxide, and phosphate coated on the outermost layer of the third glass layer or further coated glass layer;
A pattern formed by grinding the opal glass layer;
An outer covering glass having an opal glass characterized by comprising:

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