US 12,030,214 B2
Skin-forming die and honeycomb extrusion die
Thomas William Brew, Corning, NY (US); Mark Allen Spetseris, Bluffton, SC (US); and Eric Lee Thompson, Livonia, NY (US)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/293,716
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Nov. 6, 2019, PCT No. PCT/US2019/060009
§ 371(c)(1), (2) Date May 13, 2021,
PCT Pub. No. WO2020/101967, PCT Pub. Date May 22, 2020.
Claims priority of provisional application 62/768,502, filed on Nov. 16, 2018.
Prior Publication US 2022/0001576 A1, Jan. 6, 2022
Int. Cl. B28B 3/26 (2006.01); B28B 3/20 (2006.01); B01D 46/00 (2022.01); B01D 46/24 (2006.01)
CPC B28B 3/269 (2013.01) [B01D 46/0001 (2013.01); B01D 46/2418 (2013.01); B01D 2279/30 (2013.01); B28B 2003/203 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A honeycomb extrusion die apparatus comprising: a skin-forming die body, a matrix die body, and a skin-forming mask;
wherein the skin-forming die body has
an inlet face,
an outlet face,
a central opening,
a plurality of feed holes extending into the skin-forming die body from the inlet face to feed hole ends, and
one or more skin-forming body slots, each skin-forming body slot extending through the skin-forming die body from a skin-forming body slot inlet, located at one of the feed hole ends, to the outlet face;
wherein the matrix die body is disposed in the central opening at the center of the skin-forming die body about a longitudinal axis, and the matrix die body has a plurality of matrix feedholes and a plurality of matrix slots extending parallel to the longitudinal axis and in fluid communication with the plurality of matrix feedholes;
wherein the skin-forming mask is in contact with the outlet face of the skin-forming die body;
wherein a portion of the skin-forming mask is spaced away from a portion of the skin-forming die body such that the skin-forming mask and the skin-forming body are adapted to cooperatively form an outer channel surrounding the matrix die body;
wherein the one or more skin-forming body slots comprise two or more concentric rings of skin-forming body slots;
wherein the two or more concentric rings of slots comprise at least one inner slot and at least one outer slot, the at least one inner slot being disposed radially inward of the at least one outer slot, wherein the at least one inner slot intersects the outlet face of the skin-forming body at a first obtuse flow angle and the at least one outer slot intersects the outlet face of the skin-forming body at a second obtuse flow angle, the first flow angle and the second flow angle being measured with respect to an axis extending radially inward on the outlet face toward the longitudinal axis;
wherein the first obtuse flow angle is less than the second obtuse flow angle.