JPH03141128A - Production of decorative glass product - Google Patents

Abstract

PURPOSE:To economically obtain a deep and expressive decorative glass product by arranging many glass gobs having devitrifiable surfaces and optional shapes in a prescribed area, then heating and softening the surfaces of the glass gobs, fusing and integrating the surfaces thereof and forming thin films containing minute devitrified substances in fused interfaces thereof. CONSTITUTION:Many glass gobs 1 having devitrifiable surfaces and optional shapes are arranged in a prescribed area 2, then heated and softened to fuse and integrate the surfaces of the glass gobs 1. Thin films 4 containing minute devitrified substances are simultaneously formed in fused interfaces. Thereby, light scattering foggy or clouded thin films containing the extremely beautiful minute devitrified substances in the fused interfaces are formed in the resultant glass product 3. Any of soda-lime-based, borosilicate-based, lead silicate-based glasses, etc., can be used as the glass having the devitrifiable surfaces if the glass surfaces are devitrified by heating.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to interior and exterior materials for buildings, partitions, opening/closing doors, etc., furniture, such as top plates and cupboards for stands and tables, and lighting equipment. The present invention relates to a method of manufacturing decorative plate-shaped or block-shaped glass products used for interior decoration ornaments, etc.

[Prior Art] Conventionally, for example, as a manufacturing method for decorative plate glass for architectural use, mechanical shock is applied to a tempered glass plate to create numerous cracks while maintaining the plate-like appearance, and the resulting glass or transparent A method is known in which a laminated product is obtained by sandwiching and adhering the material between Plasti-2 plates. This product has a cracked glass plate in the center with numerous fractured surfaces that diffusely reflect light from the outside, creating a decorative effect.

[Problems to be Solved by the Invention] However, the products produced by the above-mentioned conventional method have complicated manufacturing processes, high costs, and are difficult to produce with a sense of calmness and elegance8. The object of the invention is - to eliminate the drawbacks found in the prior art mentioned above.

[Means for Solving the Problem] As a result of intensive testing and study to achieve the above purpose, the inventor has found that
After heating the glass lump to change its surface quality, when the glass surfaces are bonded together, devitrification in the shape of 71 can be generated on the fused tread surface, which softly scatters light rays from the outside. This has led to the completion of the present invention.

That is, the feature of the method for manufacturing decorative glass products according to the present invention is that a large number of glass lumps having surface devitrification and arbitrary shapes are placed in a predetermined area, and their surfaces are placed close to each other or at appropriate intervals. Then, the glass lump is heated and softened to fuse and integrate the glass lump surfaces, and a light-scattering mist or cloudy thin film containing extremely beautiful minute devitrification is formed on the fused interface. It is about forming.

In implementing the method of the present invention, the surface devitrification glass may be soda lime-based, borosilicate-based, silicolead-based, aluminosilicate-valent or divalent metal, as long as the surface of the glass devitrifies when heated. Any type of glass can be used. This surface devitrification is caused by, for example, PbO, B203,
This often occurs when the glass surface undergoes alteration due to the evaporation of volatile components such as alkali metal oxides and fine crystals precipitate.Also, even if the glass does not cause surface devitrification, crystal precipitation material By adding it to the glass surface, it can be used as a surface devitrification glass lump. These glasses may be colored in various tones, and in any case, any shape or shape may be formed inside the glass.
Do thin films scattered in size and direction create a three-dimensional mosaic landscape? However, the main cause of the light scattering effect of the product produced by the method of the present invention is the thin film devitrification that occurs at the fused interface, and may be due to simple light scattering occurring between the interfaces or light scattering caused by a large number of microbubbles attached to the interface. etc. are merely supplementary effects. Next, when placing a large number of glass lumps in a predetermined mold, etc., it is necessary to prepare various shapes such as rectangular parallelepipeds, cubes, spheres, etc. with approximate shapes, such as crushing surfaces, roughing surfaces, molding surfaces, pressing surfaces, etc. Glass blocks of any other shape, such as a pyramid shape or a pentaprism shape, may be selected as appropriate and stacked in a single layer or multiple layers like a stone wall. After adding reinforcement as necessary, the glass plate (1 to 150 mm) is mechanically and/or
Alternatively, a large number of glass lumps may be arranged close to each other by applying thermal shock to produce a large number of cracks inside the glass. In this case, if a large number of cracks are formed, The glass plate does not necessarily need to be completely divided into multiple pieces, and a single cracked glass plate may be used, but multiple cracked glass plates of the same or different thickness may be stacked together. You can. Prior to the fusing process on the surface of the glass gob, depending on the type of surface devitrification glass, a material that has a devitrification suppressing effect, a coloring material, or a material that has a photochromic effect is sprayed on the glass surface in advance, and the final product is The light scattering properties and color tone of the thin film formed can be adjusted as appropriate. After heating the glass gob to cause surface deterioration and fusing the surface phase, appropriate temperature and time conditions are applied in the fusing process in order to form the desired devitrification thin film and maintain sufficient strength of the entire product. is selected. It depends on the type of glass, the size of the product, the heating rate, etc., but in general, the viscosity of glass (η)≠lO5
- Processing can be carried out at a temperature equivalent to 5 to 108 voids for approximately 10 minutes to 30 hours. Note that in this fusion step, pressure can be applied to the glass gob if necessary.

[Example] Next, an example of the method for manufacturing a decorative glass product of the present invention will be described with reference to the drawings.

First, in this example, a borosilicate glass (composition (weight %); 5
i0262.5%, 820312%, A12030.5
%, CaO2%, BaO3%, Na2011%, K2O
9%, s b2 o30.2%) in a conventional manner,
After clarification, it was cast onto an iron plate to form a glass plate with a thickness of 8 cm. This was slowly cooled and then crushed into various arbitrary shapes to obtain a large number of glass lumps 1 having a size of about 30 to 250 cm3. As shown in Figure 1, these glass lumps 1 are placed in the refractory mold 2 by 2 to 4 pieces so that their crushed surfaces are close to each other.
They were placed in a cluster of tiered stone walls as appropriate. These glass lumps are placed in a heating furnace together with the mold and heated to approximately 300°C/h.
780℃ at a speed of r (temperature equivalent to ηζ106・2 voids)
The glass was heated to a temperature of 100.degree. C. and held at this temperature for 4 hours to soften and fuse the adjacent glass surfaces together, and then filled into a mold and fixed. After slowly cooling this glass, it was released from the mold, and only the main faces were polished to obtain a thick glass plate 3 of 40 x 70 x 5 cm3. In this glass product, a beautiful wildcat-shaped thin film 4 was formed at the internal fused interface, and microbubbles were observed in this thin film 4 in addition to countless small crystalline devitrified particles. The thin films inside the glass have various shapes, sizes, and arbitrary directions, and are scattered in a mosaic pattern while reflecting light diffusely, and their decorative effect is very great.

Furthermore, the mechanical strength of this product is sufficiently high for practical use.

Although the embodiments have been described above, the method of the present invention is not limited to the above embodiments, and the process conditions may be changed within the scope of the technical idea of the present invention, or other known techniques may be added as appropriate. Needless to say, it can be changed by doing something like this.

[Effects of the Invention] As described above, the method for manufacturing decorative glass products of the present invention uses surface devitrification glass, heats it, and generates fine devitrification grains at the fused interface between the glass surfaces. Since a mist-like mosaic thin film is formed and a large number of these are scattered inside the glass, decorative glass products with depth and taste can be obtained economically.

[Brief explanation of the drawing]

Figures 1 to 3 are diagrams showing examples of the method of the present invention.
Figure 1 is a side sectional view of the glass gob arrangement in the mold.
2 is a side cross-sectional view of the product after the glass blocks have been fused and integrated, and FIG. 3 is a perspective view of the product. l...Glass lump 2...Mold 3...Glass product 4...Mosaic thin film

Claims (1)

[Claims] (1) Arranging a large number of glass gobs with surface devitrification and arbitrary shapes in a predetermined area, then heating and softening the glass gobs to fuse and integrate the surfaces of the glass gobs, A method for producing decorative glass products, which comprises forming a thin film containing minute devitrification substances at the fused interface.