According to specific formula, raw materials after being weighed and
mixed in batch plant are transferred to melting furnace. Glass gobs
are formed to insulator shell on the press table and after
homogenization in LEHR, go to toughening station. Toughened glass
shells pass through a thermal shock line for screening the defected
parts. Whole process is fully automated and controlled by PLC.
For higher reliability of toughened
glass insulators in service conditions, as a routine process all
produced glass shells are stored in outdoor for two successive
seasons. This ensures that very fine micro cracks possibly existing
in toughened glass shells will grow and lead to breakage thus
reducing the risk of failure in service.
Glass shells are assembled with ductile iron caps and forged
steel pins using aluminous cement through
semi automated assembly line. All the metallic parts are hot
dip galvanized. After 24 hours the insulators come out from curing
water pool and completed with split pins.
For a safe and convenient transportation and handling, the
insulators are packed in wooden crates and then on pallets.