Long life tubular feed channel, heated and insulated for carrying and supplying glass melt, is seamless in circumferential direction

摘要

The inner casing comprises a tube (1) which is seamless in the circumferential direction. In the tube are heating rods (3) housed in ceramic spacing rings (2). The heating device and insulating cover (4) are integrated into the radiation units, which also contains heating coils. Ceramic shells are situated between the tube and heating rods or radiation units. The heating unit has a collar surrounding it and the tube.