SLEEVE FOR PRODUCING GLASS TUBE

摘要: PROBLEM TO BE SOLVED: To provide a sleeve for producing glass tube capable of having extremely scarce bubble defects when the using sleeve, in which site making molten flow down, refractory cylindrical body is covered with platinum. SOLUTION: This equipped 1, outer surface G platinum film or allay 5, shaft 3 internally installed coaxially 1 and made heat resisting steel, tip supporting tool 2 rear 4 nipping from both ends direction, fixing on steel an electroconductive means 6 connecting alloy 5 to wire. The are electrically short- circuited through 6.