Methods for extruding a honeycomb article with a skin surrrounding a central cellular structure

US7914724B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Dana Craig Bookbinder · Corning, US
• Thomas William Brew · Corning, US
• Frank Fabian · Weingarten, DE
• Darin Wayne Felty · Elliston, US
• Robert Bernard Lubberts · Woodhull, US
• David Lewin Poff · Pilot, US
• Kenneth Charles Sariego · Corning, US
• Andrew J. Sullivan · Bedford, US
• David Robertson Treacy, Jr. · Beaver Dams, US

Key dates

• Filing date: Jul 28, 2006
• Grant date: Mar 29, 2011
• Expiry date: Jun 27, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/236
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a method and apparatus for forming a circumferential skin surrounding a central cellular structure of an extruded honeycomb article. The method and apparatus may be used to produce defect-free skins and/or skins having large thickness and a high degree of particle alignment thereby preferably exhibiting CTE comparable to the extruded webs. These benefits are achieved by providing a die and method wherein a flow, Q, exiting any two active ones of a plurality of peripheral slots forming the skin is substantially equal. Also disclosed is a thick-skinned ceramic article having a thick extruded skin (ts′>5 tw′) with an I-value comparable to the webs.