AUTOMATIC SOOT REMOVAL MEMBER, AND MANUFACTURING APPARATUS OF GLASS PREFORM AND MANUFACTURING METHOD OF GLASS PREFORM USING AUTOMATIC SOOT REMOVAL MEMBER

摘要

PROBLEM TO BE SOLVED: To provide an automatic soot removal member that suppresses a bend and core eccentricity of a quartz glass tube in a manufacturing method of a glass preform using a CVD method, and a manufacturing apparatus of the glass preform and a manufacturing method of the glass preform that use the automatic soot removal member.;SOLUTION: In manufacture of a glass preform using a CVD method, an automatic soot removal member 24 is used while being arranged in a quartz glass tube 10 comprising a product tube part 11 and a soot tube part 12 and a dummy tube part 13 provided to both ends of the product tube part 11 respectively. The automatic soot removal member has an external diameter which is large enough to come into rubbing contact or partial contact with an inner wall surface of the soot tube part 12 and also has a space where a gas can flow at a center part, comprises a frame formed of one or two or more spiral structures; and has a function of automatically removing soot deposited on the inner wall surface of the soot tube part 12 by rotating around a center axis in the soot tube part 12 while restraining the quartz glass tube 10 from being deformed.;COPYRIGHT: (C)2014,JPO&INPIT