Furnace for dehydrating and sintering porous glass preform

摘要

A furnace for dehydrating and sintering a porous glass preform includes a core tube that passes through a center portion of a furnace body to accommodate therein the porous glass preform, a heater that is arranged around the core tube in the furnace body to heat the porous glass preform in the core tube, and a core tube weight dividing and bearing means that is arranged at an outer periphery of the core tube to divide and bear the weight of the core tube in its longitudinal direction. The core tube weight dividing and bearing means includes a plurality of collars that is protruded at a predetermined interval in the longitudinal direction at the outer periphery of the core tube, a first weight receiving means that supports the collars at the outer periphery of the core tube, and a second weight receiving means that bears the weight of the first weight receiving means.

主权项

1. A furnace for dehydrating and sintering a porous glass preform, the furnace comprising:
a core tube that passes through a center portion of a furnace body to accommodate therein the porous glass preform; a heater that is arranged around the core tube in the furnace body to heat the porous glass preform in the core tube; and a core tube weight dividing and bearing unit that is arranged at an outer periphery of the core tube to divide and bear a weight of the core tube in a longitudinal direction thereof, and the core tube weight dividing and bearing unit including a plurality of collars that are protruded at a predetermined interval in the longitudinal direction at the outer periphery of the core tube, a first weight receiving unit that supports the collars at the outer periphery of the core tube, and a second weight receiving unit that bears a weight of the first weight receiving unit.