Method and furnace for bending glass panels
AssigneeTamglass Ltd.Oy
InventorErkki Yli-Vakkuri
Life of this patent
Estimating the term…
Abstract
The invention relates to a method and furnace for binding glass panels. Preheating compartments (3) upstream of a binding compartment are used for heating a glass panel by hot-air injection applied to the top and bottom sides of a glass panel. The air employed in hot-air injection is circulated through heating resistances (15, 16). Outputs of the heating resistances (15, 16) can be adjusted for individually adjusting the temperatures of air injected to the top and bottom sides of a glass panel. The glass is heated to the proximity of a bending temperature exclusively or mainly by means of convection.
Claims7
A method for bending glass panels, said method comprising supporting a glass panel on a bending mould, conveying the glass panel as well as the bending mould on a carriage from a preheating compartment to another and raising the glass temperature in successive preheating compartments to what is almost a bending temperature, carrying the glass panel as well as the bending mould into a bending compartment for bending the glass panel therein, followed by cooling the bent glass panel, wherein in the preheating compartments the glass is heated by hot-air injection applied to the top and bottom sides of a glass panel, and the air used in hot air injection is circulated through heating elements provided with heating resistances whereby the air is heated to a desired temperature.
A furnace for bending glass panels, comprising a number of bending moulds and mould-conveying carriages whose end walls compartmentize the furnace for successive preheating compartments, a bending compartment and cooling compartments preferably below the preheating compartments and possible pre-bending compartments, wherein the preheating compartments are associated with air circulation channels, heating elements and fans therein for circulating the air aspirated from the preheating compartments through the heating elements and for injecting the heated air to the opposite sides of a glass panel in the preheating compartment.
Dependencies are inferred from the claim text.