EXTRUSION DIE MANUFACTURING METHOD

WIPO Patent Application WO/2008/066797

A3

A method of forming an extrusion die comprises depositing at least one layer of a sinterable material, such as binder-free sinterable material, in a plane creating a layer of unsintered material, applying irradiation to the at least one layer of unsintered material along a pattern creating a layer of centered material, and forming the extrusion die as a single, integrally-formed piece by repeating the depositing and irradiating steps in a coordinate direction that is substantially orthogonal to the plane, wherein a new layer is superposed upon a previously sintered layer. The extrusion die formed via this method includes an inlet section having a die inlet face and a plurality of feed channels extending from the inlet face toward a honeycomb-forming section that is spaced from the inlet face and terminates in a die outlet face that includes an array of discharge channels formed from pins. Dies having at least two of the pins coupled to one another by a structural element other than at the pin root may be manufactured by the method.

PETERSON RICHARD C (US)
STEPHENS ALAN T II (US)

PCT/US2007/024412

September 10, 2010

November 26, 2007

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CORNING INC (US)
PETERSON RICHARD C (US)
STEPHENS ALAN T II (US)

B29C48/30; B29C48/345; B29C48/32; B29C67/00

EP0336750A1	1989-10-11
JPS62236710A	1987-10-16

X. HUNAG AND S. BLACKBURN: "Developing a New Processing Route to Manufacture Honeycomb Ceramics with Negative Poisson's Ratio", KEY ENGINEERING MATERIALS, vol. 206-213, 2002, Switzerland, pages 201 - 204, XP008091274

WAYLAND, Randall S (SP-TI-3-1Intellectual Property Departmen, Corning New York, US)

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