SU1432021A1 - Method of thermomechanical cutting of glass - Google Patents

Abstract

The invention relates to the construction and production of building materials, namely to glass production, to methods of cutting hot tape (beam) immediately after its molding, and can be used for transverse or longitudinal cutting of hardened or semi-tempered glass products obtained by continuous production. In order to increase the quality of the surface of the fracture of optical glass profiles obtained by casting glass mass onto a water-cooled former, and to increase the productivity, a notch line is drawn along the lower (semi-hardened) surface of the profile. The notch applied to the hardened surface is a stress concentrator in glass. The incision line is blown with a coolant, which increases the concentration of stresses to critical, a crack develops in the glass. And since the profile itself has significant tensile stresses due to shrinkage of the resulting molten glass mass, the thermal break of the profile occurs. The glass breaks over the smallest section of the profile. Next, the glass is annealed. 1 il. S cl c

Description

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The invention relates to the construction and production of building materials, specifically to glass production, methods of cutting hot tape (bar) directly after its shaping, and can be used for transverse or longitudinal cutting of hardened or semi-tempered glassings obtained by continuous extrusion. .

The purpose of the invention is to increase the quality of the fracture surface of profiles.

from optical glass obtained by casting glass mass on a water-cooled 15 former, increasing productivity

The drawing shows a diagram of the implementation of the method of cutting glass.

Mechano-thermal cutting is carried out on a device consisting of a feeder 1, under which is located a water-cooled U-shaped form -former 2, mounted on the roller table 3, as well as the carriage 4 mounted 25 on the roller table with the possibility of its movement across the roller table , with a cutter 5 on it and an air nozzle 6 ..

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Liquid jet of glass melt flowing from the feeder nipple, getting into the water-cooled U-shaped former (refrigerator) 2, s of the wharf, acquires a predetermined profile configuration and rolls it to the cutting zone of the profile nor to the pieces. The profile enters the cutting zone, having a temperature of (250-300) C, and its lower part, end 35

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Having been synchronized with the former, it has a semi-hardened surface, and the upper part, which was located in the open air, is half-burnt. The essence of the method consists in applying a notch line cut along the bottom (semi-hardened) profile surface and blowing the notch line with compressed air from an air nozzle. The notch applied to the hardened surface is a stress concentrator in the glass, and blowing the air through the notch line increases the concentration of stresses to critical ones, which causes a crack in the glass to develop, and since the profile itself has significant tensile stresses cooling glass; and there is a thermal break profile. The glass breaks over the smallest section of the profile, i.e. perpendicular to its surface, and strictly along the incision line. The cut glass is subsequently sent for annealing.

Claims (1)

Invention Formula The method of mechano-thermal glass cutting by making an incision and blowing it with a coolant, characterized in that, in order to improve the quality of the surface of the fracture of optical glass profiles obtained by casting glass mass on a water-cooled former, the productivity of the incision is made from the side of the profile, clocked with the surface of the formatter. / 111-  CC - - NS L T, ... five. .. ,. ,,.  S.Y S rS r rfTT T t rT -LV, yuGL M.