Forming technology of float glass

Forming technology of float glass
Float glass forming process technology is the glass melting liquid, clear and homogeneous good, high temperature in the tin groove floating in the molten tin liquid surface, using molten glass liquid surface tension, liquid glass and tin liquid between the surface tension of liquid glass, the gravity of the common effect, end of liquid glass stand flat, thin, show polishing, cooling, solid type process, make high quality flat glass is better than that of the polished glass. The main factors that determine the effect of float glass are the viscosity of the glass, the surface tension and the gravity of the glass. In these 3 elements, the viscosity of the glass glass top styling effect, surface tension of liquid glass from primary glass polishing effect, glass liquid gravity first from the glass spread effect, the three on the molten glass flat, polished and thin show there must produce effect between talents float glass.
The tin permeability, tin permeability and tin permeation depth under float glass have a great influence on the quality of float glass and the deep processing of glass. At present, the CPM value of surface tin penetration under float glass indicates that it is the characteristic line count of tin per unit area of float glass under the float glass surface. It is called the tin count per minute. Generally speaking, the lower the curve is, the more smooth it is, which means that the whole plate is sowing less and even.  Compared with foreign and joint venture companies, there is a large gap in glass CPM value, and the deep processing of glass seeping glass is deep.
According to the material, the tin vapor pressure is added sharply to the tin liquid temperature. When the temperature is 730, the tin vapor pressure is 1.35 * 10Pa. When the temperature is 1440, the tin vapor pressure is 133.32 Pa. It can be seen that the temperature -4 has progressed 1 times, and the vapor pressure has increased 7.04 x 10 times. Therefore, compared to the high borosilicate glass and sodium calcium silicate glass, the vapor pressure of the tin is 142 times higher than that of the tin slot at the temperature of 300 C. So, in the production of float borosilicate glass, glass like tin in the steam bath, because produce high borosilicate glass temperature of the progress of several Baidu, tin ion activity greatly enhanced the ability of tin ion penetration into the glass pole appearance is greatly enhanced and the possibility of infiltration tin content added greatly add and the effect of tin penetration on the glass surface properties of greater change, this is a question one needs to solve the selection of float glass technology.

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