SHEET GLASS HARDENING UNIT Russian patent published in 2003 - IPC

FIELD: production of hardened building and industrial glass; glass hardening units. SUBSTANCE: proposed unit includes heating furnace, upper blowing grate with nozzles and air flow regulators. Each air flow regulator is made in form of valve kinematically linked with diaphragm chamber which is brought into communication with interior of at least two nozzles located in way of motion of glass. Mounted under upper blowing grate at distance of M = Z+b+δ is system of modules forming air cushion, where Z is distance of nozzle exit section; b is thickness of glass; δ - is distance between glass and module system; pitch is calculated by the following formula: where λ, ρ and μ are heat conductivity coefficient, density and dynamic viscosity of air, respectively; S is area of module system; A_se is area of slit; D₀ is diameter of nipple well; δ is distance to surface being cooled; α is heat transfer coefficient; ν_ak is air velocity in air cushion. Number of modules is determined from equality of maximum area of glass being hardened and area of module system forming the air cushion. EFFECT: improved quality of glass; avoidance of wavy deformation; reduced power requirements. 2 dwg, 1 tbl