METHOD FOR HEATING GLASS SHEETS, AND GLASS TEMPERING FURNACE

摘要

The invention relates to a method for heating glass sheets, and a glass tempering furnace. The glass sheets are heated by feeding them through a tempering furnace whereby the glass sheets are heated from above and below in the tempering furnace. The glass sheets are heated with blowing channels arranged substantially transverse in relation to the direction of travel of the glass sheets and with heating resistor rows arranged substantially transverse in relation to the direction of travel of the glass sheets. A heating resistor row has at least three separately controllable parts, and the temperature profile of the glass sheet is adjusted in the transverse direction by separately adjusting the different parts of the resistor row.

主权项

1. A method for heating glass sheets, in which method the glass sheets are fed through a tempering furnace in which the glass sheet is heated both from above and below whereby the glass sheet is heated by means of blowing channels arranged in the substantially transverse direction in relation to the direction of travel of the glass sheets and by means of heating resistor rows arranged in the substantially transverse direction in relation to the direction of travel of the glass sheets, the heating resistor row having at least three separately controllable parts, the heating resistor rows being arranged in the blowing channels to heat the air being blown, the blowing channels being divided into compartments according to the separately controllable parts, and the temperature profile of the glass sheet is adjusted in the transverse direction by separately adjusting the different parts of the heating resistor row.