Slide plate

US7703644B2 · kind B2 · utility

Assignee

• REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG

Inventors

• Reinhard Ehrengruber · Altdorf, CH
• Carl Hoffmann · Bodolz, DE
• Robert Sherriff · Ingelheim am Rhein, DE

Key dates

• Filing date: Sep 16, 2005
• Grant date: Apr 27, 2010
• Expiry date: May 19, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22D41/28
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for manufacturing a sliding plate for a valve closure on metallurgical melt containers may include forming the sliding plate by: integrating in a pressing procedure with a press, a pre-pressed annular insert made of a refractory ceramic material in a base body made of a refractory ceramic material; and removing the sliding plate from the press, resulting in an annular gap between a circumferential surface of the insert and a corresponding surface of the base body. The process may also include impregnating a transition area including the annular gap between the insert and the base body with an impregnation agent, and tempering the plate at temperatures between 200° C. and 700° C. to cause the impregnation agent to create a non-positive direct connection between the base body and the insert.