Vorrichtung und Verfahren zum Erhitzen eines langgestreckten Glaskörpers

摘要

In order to heat an elongate glass body which is to be used, for example, as a blank for drawing glass fibres, the glass body (3) is clamped, at its first end (9), into a rotatable first chuck (5) and the glass body (3) is introduced, by means of its second end (13), into a quartz tube (17), and this quartz tube (17) is clamped into a rotatable second chuck (7). A burner (23) which can be displaced parallel to the longitudinal axis (19) heats the elongate glass body (3) such that a so-called fire-polishing of the glass body (3) is carried out in order to improve the quality of its surface.