SU374236A1 - METHOD OF MAKING SHEET GLASS - Google Patents

Description

The invention relates to methods of sheet glass preparation by vertical extrusion and can be used in glass industry.

A known method of manufacturing sheet glass from glass melt by vertical extrusion with stabilization of glass thickness by varying the rate of extrusion.

The purpose of the present invention is to improve the accuracy of stabilizing the thickness of the glass ribbon.

To do this, the viscosity of the glass is continuously measured, the masses, in the depth of the flow and when it changes through the gap necessary to pass the glass mass from the place of viscosity measurement to the drawing area, change the drawing speed.

The viscosity iB of the depth layer of the glass melt is measured with a sensitively long element placed in front of the bridge with the camera's dial.

The transit time of the glass melt from the element of the element to the forming zone can be determined by the formula:

, 232 (L-b400)

where: TQ - v.re, m passing the glass mass from the place of control to the forming zone, (mi),

0,232 - coefficient obtained in studies.

L is the distance in mm from the location of the installation of the 1B (sensor sensor (controller) to the glass tape. (. Molding zone). Usually the transit of the glass mass from the body element to the molding zone is 1 STAND. BUT for each given mode of operation. For example, it is necessary to produce 35 mm sheet glass at a speed of 110 m / h, 35 minutes. As a result, a strong change in viscosity is obtained in advance, which makes it possible to change production in a timely manner.

The proposed method completely eliminates the production of glass tape with fluctuations: in thickness, since information on the deviation of the viscosity of the working flow of glass mass is provided prior to the start of the molding process, and the molding process itself occurs at production rates corrected depending on viscosity.

Subject invention

25

A method of manufacturing sheet glass from glass melt by vertical extrusion with stabilization of glass thickness due to a change in extrusion soon, in order to improve the accuracy of 34

the stabilization of the thickness, continuously. nzmar - necessary for the passage of glass

The viscosity of the glass melt in the depth of the flow and from the point of viscosity measurement to the depth of its duration, vanities, changes the speed of glass drawing.

374236