SU548188A1

SU548188A1 - Method for making sheet glass from glass melt

Info

Publication number: SU548188A1
Application number: SU752169351A
Authority: SU
Inventors: М.Л. Гликман; Ю.М. Тюрин; А.Г. Шабанов; З.И. Сапунар; А.В. Аврус; Е.Б. Файнберг; В.А. Рущаков
Original assignee: Саратовский Филиал Государственного Научно-Исследовательского Института Стекла
Priority date: 1975-09-19
Filing date: 1975-09-19
Publication date: 1982-09-07
Also published as: DE2641300A1; FR2326386A1; FR2326386B1

Abstract

Plant for mfg. float glass using a glass tank furnace and a float chamber, contg. molten metal, followed by a gas cushion and a cooling furnace for the glass sheet. Cooling devices are located at the outlet end of the float chamber for the uniform and intensive cooling of the glass sheet. The sheet is pref. intensively cooled over a length (A) of 1/30 to 1/15 th of the length of the float chamber and at min 5 degrees C/second/mm of glass thickness. Two inductors are pref. located in the intensive cooling zone to produce electromagnetic fields directed against each other and moving the metal in the float chamber. Cooling the glass sheet to a sufficiently low temp. before it reaches the rollers in the cooling furnace, so the underside of the sheet is hard enough to prevent its damage by the rollers. The glass may have an alkali-aluminosilicate compsn.

Description

illOO°C, расход которой регулируют шиберам 2, подают в ванну 3 с расплавом металла 4. В ванне стекломасса растекаетс по (поверхности рааплав(а металла и фор(муетс в виде непрерывной ленты стекла 5. По мере прохождени ленты вдоль ванны, тампе1рату|рный режим которой регулируют терморегул торами 6, снижают тампературу формуемой стекла и на коротком участке, составл ющем 1/30-W15 длмны ванны расплава, непосредственно перед выходом «з ванны интенси1вно со скоростью не менее 5° С/с на 1 мм толщины ленты охлаж)дают ее нижнюю поверхность, примен холод)ильники 7, в услови х активных встречных потоков расплава металла, создаваемых электромагнитными индукторами 8, и до инте-гральной температуры не ниже 650° С. После выхода из ванны расплава лента охлаждаетс на газовой опоре 9, иосле чего стекло отжишают в печи 10.illOO ° C, the flow rate of which is controlled by the gates 2, is fed into the bath 3 with molten metal 4. In the bath the glass melts along the surface of the raplav (and metal and shapes (worn in the form of a continuous ribbon of glass 5. As the ribbon passes along the bath, tamper | The regulative mode of which is controlled by thermostats 6 reduces the temperature of the formable glass and in the short section of 1/30-W15 for the molten bath, immediately before leaving the bath, intensively at a rate of at least 5 ° C / s per 1 mm of tape thickness is cooled ) give its lower surface using cool e) the cylinders 7, under the conditions of active counter-flows of the molten metal generated by electromagnetic inductors 8, and not less than 650 ° C until the integral temperature. After leaving the melt bath, the ribbon is cooled on the gas support 9, and after that the glass is pressed in the furnace 10 .

Наличие охлажденной, и всл едствие этого в большей степени затвердевщей нижней поверхности ленты, обеспечивает ее стабильный переход с расплава металла на газовую опору, что облегчает ведение технологического процесса и повыщ,ает качество выра батываемого стекла.The presence of cooled, and, to a large extent, hardened bottom surface of the tape, ensures its stable transition from the molten metal to the gas support, which facilitates the technological process and increases the quality of the glass produced.

Claims

1. A method of making sheet glass from glass melt by feeding it into a bath of molten metal, shaping a glass ribbon and then cooling it on a molten metal and gas support, characterized in that, in order to improve the quality of the glass, the bottom surface ( From the melt, m) metal to the gas support in the area of preferably 1 / 30--1 / 15 the length of the bath of the melt is cooled uniformly throughout the width of the tape at a speed of at least 5 ° C / s per 1 mm thickness of the tape.

2. A method according to claim 1, characterized in that, in order to ensure the cooling of its lower surface, which is intense and uniform throughout the width of the tape, in the cooling zone, the force is affected by counter electromagnetic.

Sources of Information, taken into account during the examination:

1.Patent of the USSR No. 199034, SOS 18/02, 1902.

2.Avtoral certificate of the USSR No. 299470, SOR'S 18/02, 1966.

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