Corning Incorporated

Robert Bernard Lubberts

Dana Craig Bookbinder

Thomas William Brew

Robert John Locker

David Robertson Treacy, Jr

Joseph Henry Citriniti

Kenneth Charles Sariego

Jeffrey Owen Foster

Casey Allen Volino

Darin Wayne Felty

David Lewin Poff

Andrew Joseph Sullivan

Richard D Putt

David Robert Potts

Frank Fabian

Eugene C Grover

Stephen John Caffrey

Daniel Edward Mccauley

Jr David Robertson Treacy

A honeycomb extrusion apparatus comprises a die body and a flow control device. The die body comprises an inlet end, an outlet end, a central axis, a first set of feedholes, a second set of feedholes, a set of central slots, and a set of outermost peripheral slots. The first set of feedholes extends from the inlet end to an interior interface portion of the die body. The second set of feedholes extends through the die body from the inlet end to the outlet end. The set of central slots extends from the outlet end to the interior interface portion of the die body. The set of outermost peripheral slots is disposed radially outwardly of the central slots. The interior interface portion of the die body is configured to allow flow of the batch material from the first set of feedholes to the central slots and to the outermost peripheral slots.

Apparatus and method for forming skin on a ceramic body by extrusion

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 (t&#x3e;5 t) with an I-value comparable to the webs.

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

An extrusion apparatus which satisfactorily adjusts differences in skin-body flow rates at multiple locations around the die, and allows for the external manipulation of the interior components controlling batch flow, during the production without having to stop manufacturing operations to effect the necessary changes thereat.

Apparatus for extruding honeycomb bodies

Apparatus and a method for extruding a honeycomb, providing correction in bowing of the extruded honeycomb structure, employs a deflector device having a base plate including an aperture aligned in a direction parallel to the extrusion axis through which the plastic material is conveyed to the die, the aperture having a varying diameter; and, a slide plate movably mounted to the base plate, the deflector device positioned upstream of the extrusion die, the degree of bow reduction depending on the diameter or width of the aperture imparting a pressure drop gradient on the flow stream entering the die.

Apparatus for correcting bow in a honeycomb extrudate

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Woodhull, NY, United States of America

Robert Bernard Lubberts