Method for homogenizing glass

US12246981B2 · 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 27, 2022
• Grant date: Mar 11, 2025
• Expiry date: Apr 21, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B19/066
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for homogenizing glass includes the method: providing a cylindrical blank composed of the glass having a cylindrical outer surface that extends along a longitudinal axis of the blank 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 displacing the shear zone along the longitudinal axis of the blank. The displacement of the shear zone along the longitudinal axis of the blank is superimposed by a simultaneous oscillating motion of the shear zone along the longitudinal axis of the blank. The first end of the blank is rotated at a first rotational speed and the second end of the blank is rotated at a second rotational speed. An oscillating motion of the shear zone is generated by periodically varying the first and/or second rotational speed.