Schott Ag

Detlef Mevers

Horst Schillert

Dirk Roessler

Dirk Rössler

A method for bending radiation shielding glass which has a heavy metal oxide content of at least 50% by weight is provided, wherein first a mold is provided, a glass plate comprising a radiation shielding glass is then provided, the mold is preheated to a temperature of 300 to 400&#xb0; C., the glass plate is placed on the mold, the glass plate and the mold are heated in a furnace to a temperature of 370 to 430&#xb0; C., then heated together to a temperature of 400&#xb0; C. to 500&#xb0; C., preferably to 440 to 500&#xb0; C., the total heating time being at least 30 minutes, preferably at least 60 minutes, the glass plate is then molded and finally the molded glass is cooled by means of a cooling program over a period of at least 60 minutes. For thermal prestressing, the glass body is supported at least at its outer periphery at a number of support points, introduced into a preheated furnace, heated to 400 to 500&#xb0; C. and then removed, and cold air is blown onto both sides from a multiplicity of nozzles, preferably until cooling to about 100&#xb0; C. has taken place.

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Holzen, Germany

Detlef Mevers