RU2232728C1 - Decorative glass manufacture process - Google Patents

Abstract

FIELD: glassmaking.

SUBSTANCE: invention relates to methods for modulating applied pattern when manufacturing decorative glass of the type "Metelitsa". Proposed process is realized by additionally feeding gaseous oxidative reagent into treatment zone wherein glass tape with modified surface is treated, said reagent possibly being pure oxygen, compressed air, mixture of oxygen with nitrogen or other neutral gases.

EFFECT: improved quality of decorative glass due to burned out carbon film and widened assortment of produce.

4 cl, 6 dwg, 5 ex

Description

1. The prior art.

The invention relates to methods for regulating the pattern upon receipt of patterned decorative glass on molten metal, and in particular to methods for producing glass of the “Blizzard” type.

A known method of producing decorative glass by ed. St. No. 467040, MKI C 03 В 18/14, С 03 С 23/00, according to which the drawing on the surface of float glass is achieved by treating the upper surface of the tape in a bath with molten tin with a gas reagent, for example, products of dry distillation of wood, limit pairs and unsaturated organic hydrocarbon compounds and other organic substances, followed by stretching to break the formed film.

The disadvantage of the invention is that it does not propose a method for regulating the pattern on the glass, i.e., changing the size and configuration of the matte and glossy areas.

According to the patent of the Russian Federation No. 2174497, C 03 B 18/02, taken as the closest prototype, it is proposed to regulate the pattern on the surface of the glass produced by the float method. Obtaining decorative glass is carried out by forming a glass ribbon on a molten metal with simultaneous processing of the glass surface with a reagent that creates a modified layer, and its subsequent rupture. At the same time, the character of the pattern on the glass is controlled by the number and speed of the onboard forming machines, and the rotation speed of each subsequent pair is less than the previous one.

The disadvantage of this method is that using the proposed methods it is impossible to influence the nature of the pattern in individual sections of the glass ribbon, i.e. Get fragmented decoration. The pattern changes only in size and relief (small, medium, large), while remaining the same in character across the entire width of the glass ribbon.

2. The invention.

A method of obtaining a pattern on a float glass ribbon is carried out by forming a glass ribbon on a metal melt with simultaneous treatment of the upper surface of the glass with a gas reagent to create a modified layer and then stretching the ribbon to form a pattern on the glass, which represents the alternation of matte and glossy areas. The nature of the pattern (dimensions, configuration, and location of the matte and glossy areas) is regulated by the additional supply of a gas reagent-oxidant to the modified surface of the glass ribbon or to its individual sections.

Pure oxygen, compressed air or oxygen mixed with nitrogen or other neutral gases can be used as an oxidizing reagent. Nitrogen or other neutral gases are used as a carrier gas. The total consumption of the oxidizing agent, for example, for a line with a capacity of 100 tons / day, can be changed in the range of 10-300 l / h. In this case, the oxygen content in the supplied oxidizing reagent can be changed from 0.1 to 99%. Before being fed into the treatment chamber located in the melt bath, the reagent-oxidizer, depending on the given pattern, can be cooled to (-5) - (-40) ° C or heated to (+30) - (+600) ° C, or used at ambient temperature.

In the “Metelitsa” glass production, a pattern on glass is formed due to the fact that a carbon film (soot) appears on the surface of the glass treated with the products of hydrocarbon pyrolysis, which changes the viscosity of the surface layer of the glass, and the film viscosity is different on different parts of the surface. Under the influence of tensile forces, this film ruptures, due to which a glossy surface forms in exposed sections of low viscosity, which is the exposed inner layers of glass, and in areas with high viscosity a frosted surface forms, which is a rough glass layer with carbon particles deposited on it .

When the glass tape exits the molten bath, carbon particles present on the glass surface interact with atmospheric oxygen and burn out. Thus, glass has a clean, carbon-free surface.

The proposed method is based on the technique of burning molten carbon particles (soot) in a bath formed as a result of propane pyrolysis on the surface of a glass ribbon and / or in close proximity to the glass surface immediately after processing the glass ribbon with a modifying reagent or some time after this processing.

The oxidizing reagent is supplied to the glass surface, for example, in the form of jets. By changing the amount of the oxidizing reagent, the place of its supply, the distance from the place of processing the glass tape with the modifying reagent, you can adjust the nature of the pattern or get new patterns.

The directed action of the supplied oxidizing reagent binds carbon, forming volatile CO and CO2 compounds, while the carbon film formed on the glass surface decreases or completely disappears and, thus, the pattern changes at the place of processing of the glass with the oxidizing reagent or the surface becomes polished sheet glass.

The implementation of the invention is carried out in the temperature range 800-900 ° C by feeding the reagent-oxidant through gas distribution tubes located in the device for processing glass tape (first option), or separately from it (second option).

3. The list of drawings.

Figure 1 - schematic representation of a method of forming a decorative glass in accordance with the invention.

Figure 2 is a schematic illustration of a gas distribution device for implementing this method according to the first embodiment.

Figure 3 is a schematic illustration of a gas distribution device for implementing this method according to the second embodiment.

Figure 4 (a, b, c) - fragments of patterns obtained using the new method.

4. Information confirming the possibility of carrying out the invention.

Glass melt from a glass melting furnace is fed through a tray to a bath 1 on the surface of molten tin 2, where glass tape 3 is molded (Fig. 1). The surface of the molded glass tape 3 at a temperature of 800-900 ° C is subjected to treatment with a modifying gas reagent - propane using gas distribution tubes 4 of the device 5 for processing a glass tape (first option) or separately from it (second option).

To implement this method, the following devices are used.

According to the first embodiment (Fig. 2), the device is a water-cooled beam 6 with a treatment chamber 7, in which gas distribution tubes 4 with nozzles for supplying the modifier reagent are located at a distance of 100-300 mm (for a line with a capacity of 100 t / day) and gas distribution tubes 8 for supplying an oxidizing agent. Modifier reagent nozzles have holes with a diameter of 0.5-2 mm in increments of 50 mm; nozzles for supplying the reagent-oxidizer have holes with a diameter of 0.2-1 mm in increments of 100 mm or any other, depending on the given pattern.

According to the second embodiment of the method (Fig. 3), the oxidizing agent is supplied using gas distribution tubes 8 located in a special refrigerator 9 located behind the device 5 for processing a glass tape at a certain distance in the direction of glass movement. The specified distance is selected empirically and can be in the range of 10-2000 mm.

This invention is illustrated by the following examples.

Example 1. The surface of the molded glass tape 3 at a temperature of 800-900 ° C is subjected to treatment with a modifying gas reagent propane in an amount of, for example, 150 l / h using gas distribution tubes 4 of the device 5 for processing the glass tape 3.

At the same time, compressed air in the amount of 10 l / h is supplied through the gas distribution tubes 8. Pyrolysis of propane and partial oxidation of the formed carbon film on the surface of the glass ribbon 3 results in the formation of a “Metelitsa” pattern. The value of the matte sections is 25-50 mm (figa).

Example 2. The process of obtaining decorative glass is the same as in example 1, while compressed air is supplied in an amount of 25 l / h.

As a result of pyrolysis reactions and exposure to the oxidizing reagent, a decorative pattern is formed on the glass ribbon with a matte size of 10-20 mm (Fig. 4b).

Example 3. The process of obtaining decorative glass is carried out in the same way as in example 1, while through the gas distribution pipes 4 local jets, that is, on separate sections of the glass ribbon, compressed air is supplied in an amount of 75 l / h at ambient temperature. As a result of pyrolysis of propane and local combustion of soot particles, a pattern is formed, which is an alternation of glossy strips 30 mm wide and matte strips 50 mm wide (Fig. 4c). In this case, the matte stripes have a textured pattern such as small-relief “Snowstorm”.

Example 4. The process of obtaining decorative glass is carried out in the same manner as in example 1, while a mixture of oxygen and nitrogen in an amount of 300 l / h is used as an oxidizing reagent. The oxygen content in the mixture is 0.1%. As a result of propane pyrolysis and partial burning of soot particles, a pattern is formed, which is an alternation of glossy strips 2 mm wide and matte strips 65 mm wide, having a textured pattern of small-relief “Metelitsa”.

Example 5. The process of obtaining decorative glass is carried out in the same manner as in example 1, while a mixture of oxygen and nitrogen in an amount of 100 l / h is used as an oxidizing reagent. The oxygen content in the mixture is 99%.

As a result of pyrolysis of propane and partial burning of soot particles, a pattern is formed that is an alternation of glossy strips 70 mm wide and matte strips 2 mm wide.

The embodiments described and described in Examples 1-5 are illustrative only and imply the possibility of making changes without departing from the scope of the present invention.

The gas reagent-oxidizer can be fed intermittently with different frequency and changing direction of the jets. Thus, it is possible to obtain various types of patterns, which are an alternation of longitudinal smooth stripes of different widths and matte stripes with a pattern like “Metelitsa” also of different widths.

Gas distribution tubes for supplying an oxidizing agent can also be reciprocated with a frequency of 0.1 to 50 Hz. In this case, a curly ribbon pattern forms on the surface of the glass.

Claims (4)

1. A method for the production of decorative glass, including forming a glass ribbon on a molten metal in a nitrogen-hydrogen reducing medium while simultaneously treating the glass surface with a gas reagent, creating a modified layer on the glass surface and then stretching the ribbon to form a pattern on the glass, which is an arbitrary alternation of frosted and glossy areas, characterized in that on the upper surface of the glass ribbon with a pre-modified reagent surface additional but fed gas oxidizer reactant. 2. The method according to claim 1, characterized in that the gas reagent-oxidant is fed to individual sections of the glass ribbon. 3. The method according to claim 1, characterized in that pure oxygen, compressed air, oxygen mixed with nitrogen and other neutral gases can be used as an oxidizing reagent. 4. The method according to claim 2, characterized in that the oxygen content in the composition of the oxidizing reagent varies from 0.1 to 99%.

Images