Method for reshaping glass-ceramic articles, apparatus for performing the method and glass-ceramic articles made thereby

US8650907B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Martin Taplan · Rheinböllen, DE
• Herwig Scheidler · Mainz, DE
• Ioannis Kosmas · Stadecken-Elsheim, DE
• Friedrich Schroeder · Stuttgart, DE
• Wolfgang Schmidbauer · Mainz, DE
• Torsten Gabelmann · Wiesbaden, DE
• Dieter Schoenig · Mainz, DE

Key dates

• Filing date: Jul 17, 2008
• Grant date: Feb 18, 2014
• Expiry date: Oct 26, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03B29/08
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The method produces a reshaped glass-ceramic article by forced reshaping of a flat green glass part during a ceramicizing process with temporarily lowered viscosity due to crystallization heat. To perform the forced reshaping economically the forced reshaping takes place in a continuous oven for ceramicizing and in an oven section in which the viscosity of the green glass part is temporarily lowered as a result of crystallization heat. An apparatus for performing the process is provided in the continuous oven including different active reshaping devices and/or a hollow mold. The method produces glass-ceramic articles with undamaged surfaces corresponding to surfaces produced during the making of the green glass part (smooth or structured, e.g. knobbed).