Method and device for homogenizing glass

US11459262B2 · kind B2 · utility

Assignee

• HERAEUS QUARZGLAS GMBH & CO. KG · DE

Inventors

• Stephan Thomas · Großkrotzenburg, DE
• Jan Vydra · Hanau, DE
• Martin Trommer · Bitterfeld-Wolfen, DE
• Michael Huenermann · Alzenau, DE
• Andreas Langner · Alzenau, DE
• Walter Lehmann · Leipzig, DE
• Stefan Hengster · Schaafheim, DE
• Klaus Becker · Hanau, DE

Key dates

• Filing date: Oct 24, 2019
• Grant date: Oct 4, 2022
• Expiry date: Oct 12, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2203/52
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A known method for homogenizing glass includes the following steps: providing a cylindrical blank composed of the glass, having a cylindrical outer surface which extends between a first end face and a second end face, forming a shear zone in the blank by softening a longitudinal section of the blank and subjecting it to a thermal-mechanical intermixing treatment, and moving the shear zone along the longitudinal axis of the blank. To reduce the risk of cracks and fractures during homogenizing, it is proposed that a thermal radiation dissipator is used that at least partially surrounds the shear zone, the lateral dimension of which in the direction of the longitudinal axis of the blank is greater than the shear zone and smaller than the length of the blank, the thermal radiation dissipator being moved synchronously with the shear zone along the longitudinal axis of the blank.