Apparatus and method for tempering glass sheets

Details Apparatus and method for tempering glass sheets Apparatus and method for tempering glass sheets

C - Chemistry, Metallurgy

03

B

C03B 27/044 (2006.01)

Patent

CA 2630036

A method of tempering a glass sheet heated to a tempering temperature includes cooling the glass sheet at a first heat transfer coefficient at a first quench station and cooling the glass sheet at a second heat transfer coefficient at a second quench station downstream of the first quench station. The second heat transfer coefficient is greater than the first heat transfer coefficient. In a multistage process of the invention, a plurality of quench stations could be used with each downstream quench station having a larger heat transfer coefficient than the previous upstream quench station.

L'invention concerne un procédé de trempe d'une plaque de verre chauffée à une température de trempe, consistant à refroidir la plaque de verre avec un premier coefficient de transfert thermique dans un premier poste de refroidissement, et à refroidir la plaque de verre avec un second coefficient de transfert thermique dans un second poste de refroidissement situé en aval du premier poste de refroidissement. Le second coefficient de transfert thermique est plus élevé que le premier coefficient de transfert thermique. L'invention porte sur un processus en plusieurs étapes qui peut comprendre l'utilisation d'une pluralité de postes de refroidissement, chaque poste de refroidissement présentant un coefficient de transfert thermique plus élevé que celui du poste de refroidissement précédent.

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