Verfahren zum halbkontinuierlichen Ziehen von Vorformen für optische Fasern beinhaltend einen Schritt zur Vorwärmung

摘要

During fibrillation of a first preformer (5), a second preformer (12) is heated in a pre-heat furnace (16) arranged adjacent to the fibrillation furnace (6). The two adjacent furnaces act alternately as the pre-heat furnace and the fibrillation furnace. In the fibrillation of a fiber optic, a first preformer (5) descends following a fibrillating direction (L) through a fibrillation furnace (6) in order that it may be heated and drawn into a fiber optic and a second preformer (12) descends following the fibrillating direction through the fibrillation furnace so that it may be heated and drawn in its turn after the withdrawal of the first preformer. During fibrillation of the first preformer (5), the second preformer (12) is heated in a pre-heat furnace (16) arranged adjacent to the fibrillation furnace (6). The two adjacent furnaces act alternately as the pre-heat furnace and the fibrillation furnace.