Glass base material elongating method and glass base material elongating apparatus

摘要

A glass base material elongating method of sequentially feeding rod-like glass base materials hung by a glass base material feeding mechanism into a heating furnace, and pulling a glass rod with a smaller diameter by a pulling chuck at a lower part of the heating furnace, includes: aligning, by an alignment guiding device that guides the glass rod, a guiding center of the alignment guiding device with an axis of the glass rod, the alignment guiding device guiding the glass rod between the heating furnace and the pulling chuck.

主权项

1. A glass base material elongating method comprising:
feeding a glass base material hung by a glass base material feeding mechanism into a heating furnace; pulling a glass rod by a pulling chuck at a lower part of the heating furnace, the pulling of the glass rod establishing an axis of the glass rod; and shifting a guiding center of an alignment guiding device such that the guiding center conforms to the established axis of the glass rod, the alignment guiding device guiding the glass rod between the heating furnace and the pulling chuck.