SU535226A1 - Device for vertical drawing of sheet glass - Google Patents

Description

one

The invention relates to devices for the vertical extrusion of sheet glass, both BOTTLE and barren, and can be used in the glass industry.

Known furnaces for stretching sheet glass, where wall-thresholds, ledges at the bottom of the pool are installed in the machine channel. The walls of the pool are lined with high-quality refractories 1.

The closest technical solution to the present invention is a device comprising a machine channel, an aircraft frame with a REFRIGERATOR, a glass ribbon drawing machine and a stirrer 2.

Thermal heterogeneity of glass mass is associated with temperature gradients across the width and depth of the machine channel, as well as with the presence of direct and reverse flows in the machine channels of production, which also have different temperatures.

The chemical heterogeneity of the glass mass is associated with fluctuations in the chemical composition of raw materials and the imperfection of the methods of weighing and mixing the mixture. When cooking in a bath furnace, the glass mass is averaged, but its full homogeneity is not reached.

The purpose of the invention is to improve the thermal and chemical homogeneity of the glass mass, ideally, for the formation of a glass ribbon.

The goal is achieved by the fact that in the device for the vertical extrusion of sheet glass between the iodine machine and the machine channel, a slug chamber is mounted with the ducts with which the agitators are installed.

FIG. 1 shows a device for vertical BOAT extrusion of sheet glass, longitudinal section; pas figs. 2-device in the plan; in fig. 3 — A device for vertical, barren-free drawing of sheet glass, longitudinal section.

In the device for vertical boat stretching of the glass ribbon, the student part of the glass furnace furnace is connected by ducts to the machine channel 1, next to which the vehicle-chamber chamber 2 with the BOAT 3 and refrigerators 4 are located. A machine for extracting the glass ribbon is installed above the chassis: .

In the main channel 1, the homogenizer chamber 6 is mounted, having two walls 7 and 8 on the side of the glass melting furnace and on the side of the submachine chamber. In each of the walls there are ducts 9 and 10 for glass melt. Chamber homogenizer 6 has a lining

11 of molybdenum with heat-resistant coating

or platinum. Gas burners 12 are installed in the homogenization chamber 6 to maintain the desired temperature. Instead of gas burners, an electric heater can be installed. Refractory plates 13 are installed on top of the homogenizer chamber 6, which covers the openings through which the coolers 14 pass. Refractory mixers 15, lined with metal or without lining, are attached to the lower part of the refrigerators. Mechanisms (not shown) for bringing the agitators into position are located above the homogenizing chamber.

For servicing the agitators 15 and the machine 5, an insert 16 is installed for removing the ribbon of glass and is cooled by water.

In the end wall 17 of the machine channel, grooves 18 are made to accommodate electric heaters in them, with which they compensate for heat losses by the walls of the machine channel 1.

The operation of the device for the vertical drawing of sheet glass is carried out as follows.

The glass melt from the stud part of the glass furnace furnace enters through the ducts 9 into the homogenizer chamber 6. When the spacer 15 is rotated, the glass mass is intensively mixed, with the glass mass moving from top to bottom and back in a closed circle. After mixing the glass melt for several hours, it passes through the ducts 10 to the place where the glass ribbon is molded to the onion; - after shaping, the glass ribbon passes through the vehicle compartment 2 and is pulled upwards by 5.

The thermal and chemical homogeneity of the glass melt is greatly improved by separating the molding site from the furnace bath and creating a regime independent of the bath mode of the furnace in it, as well as eliminating the back flow of the glass melt at the site of forming the glass ribbon.

Claims (2)

1. Glass technologies, edited by I. I. Kitaygorodsky, Stroyizdat, 1967, with. 207. 2. USSR author's certificate L 343951 cl. Colds 5/04, 1970. " 9 k 1S 17 .ypoScHd x / cfTjefflOffaP Yes J3