Methods for extruding a honeycomb article with a skin...

Details Methods for extruding a honeycomb article with a skin... Methods for extruding a honeycomb article with a skin...

2011-03-29

2011-03-29

Johnson, Christina (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S177110, C264S177160, C264S211110, C425S461000, C425S464000, C428S073000

Reexamination Certificate

active

07914724

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.

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Machine translation of DE 3521883 A1.

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