BLOWING BOX FOR THERMAL PRESTRESSING OF GLASS SHEETS Russian patent published in 2020 - IPC C03B27/04 

FIELD: glass.

SUBSTANCE: invention relates to means for thermal hardening of glass sheets. Disclosed device for thermal prestressing of glass sheets, comprises first blowing duct (1.1) and second blower duct (1.2), wherein each of the first blowing duct (1.1) and the second blower duct (1.2) comprises a fixed portion having cavity (2) and a gas supply line (3) connected to cavity (2), and at least one closing element (5, 15) having a plurality of nozzles connected to cavity (2) for supplying air flow to surface of glass sheet (I). At least one closing element (5, 15) is connected to the fixed part by at least a variable-length connection element (6), and at least one closing element (5, 15) is movable relative to fixed part so that distance between closing element and fixed part is variable. Purging ducts (1.1, 1.2) are provided with means (7) for moving at least one closing element (5, 15). Blowing ducts (1.1, 1.2) are located opposite to each other so that closing elements (5, 15) of the first blowing duct (1.1) and the second blowing box (1.2) are directed towards each other. Device also comprises means of moving glass sheet (I) in intermediate space between first blower duct (1.1) and second blow duct (1.2). At that means (7) of movement of at least one closing element (5, 15) are made with possibility of approaching at least one closing element (5, 15) to glass sheet (I), when glass sheet (I) is located in intermediate space between first blower duct (1.1) and second blow duct (1.2), while fixed part remains unmoved, as well as with possibility of removal of at least one closing element (5, 15) from glass sheet (I) before movement of glass sheet (I) from intermediate space between first blow duct (1.1) and second blowing duct (1.2).

EFFECT: technical result is provision of blowing box for thermal prestressing of glass sheets, which is more flexible for use, considerably reduces force during transition between different types of sheets and is based on less complex mechanical mechanisms of movement.

15 cl, 14 dwg