RU2291123C1 - Method of production of decorative glass on metal melt - Google Patents

Abstract

FIELD: production of decorative glass on metal melt; production of float-glass.

SUBSTANCE: proposed method makes it possible to control nature of pattern, sizes and direction of dull and glossy sections. Nature of pattern is regulated by cooling the glass surface by means of water-cooled coolers or jet-type cooling system using neutral gas or nitrogen-and-hydrogen protective atmosphere as cooling agent.

EFFECT: enhanced efficiency.

3 cl, 3 dwg, 4 ex

Description

Technical field

The invention relates to methods for manufacturing decorative glass on a molten metal and can be used to obtain float glass of the type "Metelitsa".

State of the art

A known method of producing decorative glass according to copyright certificate No. 467040, MKI C 03 B 18/14, C 03 C 23/00, according to which the receipt of the pattern on the surface of the float glass is achieved by treating the upper surface of the glass ribbon with a gas reagent, for example, dry products distillation of wood, in pairs of saturated 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, that is, resizing matte and glossy areas.

A known method of producing decorative glass with an adjustable pattern according to the patent of the Russian Federation No. 2174497, MKI C 03 B 18/02, according to which the nature of the pattern of glass is regulated by the number and speed of drowning machines, and the rotation speed of each subsequent pair of machines is less than the previous one, which allows the formation of several “Puddle” of plastic glass tape and, accordingly, tears of the modified layer not only in the longitudinal, but also in the transverse directions. The disadvantage of this method is that to obtain glass with a thickness of less than 5.5 mm, it is necessary to use three or more pairs of thinning machines, which greatly complicates the process.

The closest in technical essence is the method according to patent No. 2232728, MKI C 03 B 18/02, 18/14, taken as the closest prototype, which proposes to regulate the nature of the pattern by additional supply of a gas reagent-oxidant to the modified surface of the glass ribbon.

It is proposed to use pure oxygen, compressed air, or oxygen mixed with neutral gases as an oxidizing agent.

The disadvantage of this method is that it is proposed to use oxygen to obtain decorative glass, which adversely affects the quality of the nitrogen-hydrogen protective atmosphere of the melt bath during prolonged production of decorative float glass. The oxygen content in the molten bath should not exceed 0.0005%, since the increased oxygen content causes a decrease in the quality of the lower surface of the glass ribbon due to defects of “tin sticking”.

Disclosure of 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 reagent that creates a modified layer, and then tearing this layer to form a pattern on the glass, which is an alternation of matte and glossy areas.

The nature of the pattern (relief, size and direction of the matte and glossy areas) is regulated by cooling the glass surface using water-cooled refrigerators or an inkjet cooling system using nitrogen, a nitrogen-hydrogen protective atmosphere, or other neutral gas as a cooling agent.

Refrigerators or a jet cooling system can be located directly in the gas distribution device for supplying the modifying reagent or after it up to the onboard forming machines. In this case, additional reinforcement of the surface layer of the glass ribbon occurs. The intensity of cooling the glass surface can vary from 0.1 to 10 W / cm ² , which helps to reduce the viscosity of the surface layer of glass by 1.5-3 times.

However, this technique provides equalization of the viscosity of the modified glass layer across the width of the tape. In this case, a finer and more uniform pattern with a rupture of the surface layers to a depth of 1.5-2 mm is formed.

Reception of additional reinforcing of the modified surface of the glass ribbon is especially effective for float lines with high productivity.

In addition, the cooling of the glass surface can be carried out selectively over the width of the moldable tape using movable screens mounted on refrigerators or by selectively supplying neutral gas to various sections of the glass tape through a gas distribution cooling system. The flow rate of gas supplied through the cooling system can vary from 0.1 to 3.0 nm ³ / h (the volume of gas reduced to normal conditions).

Brief Description of the Drawings

Figure 1 is a schematic illustration of a melt bath for the production of decorative glass in accordance with the invention. The drawing shows a bath 1 with molten metal 2, a glass tape 3, a device 4 for processing the upper surface of a glass tape with a modifying reagent, a water cooler and a neutral gas jet cooling system 5, bead forming machines 6.

Figure 2 is a schematic cross-sectional view of a molten bath for the production of decorative glass on molten metal. The drawing shows a bath 1 with molten metal 2, a ribbon of glass 3, a water cooler 5, movable screens 7.

Figure 3 is a schematic representation of a longitudinal section of a molten bath for the production of decorative glass on molten metal. The drawing shows a bath 1 with molten metal 2, a glass tape 3, a device 4 for processing the upper surface of a glass tape with a modifying agent, a water cooler and a neutral gas jet cooling system 5, on-board forming machines 6, a system of nozzles for neutral gas cooling 8.

The implementation of the invention

The invention is illustrated by the following examples.

Example 1

Glass melt from a glass melting furnace is fed through a tray to a bath 1 on the surface of molten metal 2, where glass tape 3 is formed (Fig. 1). The surface of the molded glass tape 3 at a temperature of 800-900 ° C is subjected to treatment with a modifying reagent using device 4.

Then the treated surface of the glass tape is subjected to additional cooling using a refrigerator 5, providing an intensity of cooling the glass surface of 0.1 W / cm ² and subsequent stretching using bead-forming machines 6.

The desired cooling rate of the surface layer of the glass is achieved by changing the active area of the refrigerator and / or changing the distance of the refrigerator from the surface of the glass.

As a result of tearing of the viscous surface layer of glass obtained by additionally reinforcing the modified surface of the tape 3, a Metelitsa pattern more uniform in the direction of drawing is formed. The width of the matte sections is 30-35 mm. The uniformity of the pattern across the width of the glass ribbon can be achieved by isolating the edge sections of the refrigerator or moving screens.

Example 2

The process of obtaining decorative glass is the same as in example 1, while the additional cooling of the glass tape 3 is carried out using several refrigerators 5, providing an intensity of cooling the glass surface of 10 W / cm ² . As a result of rupture of a more viscous surface layer of glass, a small pattern is formed with a width of matte sections of 10-15 mm.

Example 3

The process of obtaining decorative glass is the same as in example 1, with additional cooling of the surface layer of the glass is carried out by supplying nitrogen through the nozzle system of the device 5 in an amount of 0.1 nm ³ / hour.

As a result of the tear obtained in this way, the viscous surface layer of glass forms a decorative pattern with a width of matte sections of 25-35 mm.

Example 4

The process of obtaining decorative glass is carried out in the same way as in example 1, while additional cooling of the surface layer of glass is carried out by supplying a protective gas through the nozzle system of device 5 in an amount of 3.0 nm ³ / h.

As a result of rupture of a more viscous layer of glass, a decorative pattern is formed with a width of matte sections of 10-20 mm.

The embodiments described and described in Examples 1-4 are illustrative only and imply the possibility of making changes without departing from the scope of the present invention.

The cooling of the modified glass surface by means of a supply of gas jets can be carried out selectively, with different periodicities. Thus, it is possible to obtain various types of patterns, which are an alternation of longitudinal stripes with a small and large pattern like "Blizzard".

Claims (3)

1. A method of producing decorative glass on a molten metal, comprising forming a glass ribbon on a molten metal with simultaneous processing of the glass surface with a reagent to create a modified layer, and its subsequent rupture using bead-forming machines, characterized in that after the bead is treated with a glass reagent until the time of using bead-forming machines, the glass surface is cooled with an intensity of 0.1-10 W / cm ² to change the nature of the pattern by using refrigerators or an inkjet cooling system using protective gas, nitrogen or other neutral gas at a gas flow rate of 0.1-3.0 nm ³ / h 2. The method according to claim 1, characterized in that the cooling of the surface of the tape is carried out using water coolers selectively across the width of the tape using movable screens. 3. The method according to claim 1, characterized in that the cooling with neutral gas is carried out selectively along the width of the tape by supplying an adjustable amount of gas to various sections of the glass tape.

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