DEVICE FOR TEMPERING PANES OF GLASS BY BLASTING WITH AIR TO GIVE A HIGH RATE OF CONVECTIVE HEAT TRANSFER

摘要

The invention concerns a high-convection gas-nozzle line, in particular a line for tempering flat articles such as panes of glass passing over rollers (10). The tempering line has an upper nozzle system (with a housing (1), fins (3), caps (5), nozzle orifices(7o) and back-flow slots (8o) between the caps (5), a lower nozzle system (with a housing (2), fins (4), caps (6), nozzle orifices (7o) and back-flow slots (8u) between the caps (6)) and a conveyor system associated with the lower nozzle system. The conveyor system has conveyor and support rollers (10) located between the lower nozzle caps, plus a drive unit for the rollers (10). The tempering line is characterized by the following features: the caps (6) containing the lower nozzle orifices (7u) essentially form the whole of the upper surface of the lower nozzle system; the rollers (10) project upwards, between the lower fins (4), through the upper surface of the lower nozzle system through holes which are very small in area compared with the area of the upper surface of the lower nozzle system; the lower nozzle system has a support device (22) designed to lift vertically; the upper nozzle system has a suspension device (21) designed to lift vertically.