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    HONEYCOMB EXTRUSION DIES AND METHODS OF USING AND MAKING SAME
    4.
    发明公开
    HONEYCOMB EXTRUSION DIES AND METHODS OF USING AND MAKING SAME 审中-公开

    公开(公告)号：US20240190043A1

    公开(公告)日：2024-06-13

    申请号：US18288044

    申请日：2022-05-18

    Applicant: CORNING INCORPORATED

    Inventor： Michael James Lehman ,  Min Shen

    IPC: B28B3/26

    CPC classification number: B28B3/269

    Abstract: A honeycomb extrusion die (120) with improved wear properties. Extrusion die has a die body (121) with inlet (122) and exit (123) faces, feedholes (124) with feedhole entrances (124A) and outlets (124B), and a plurality of die pins (126) having side surfaces (128) configured to define a matrix of intersecting slots (130). At least some of the intersecting slots and die pins define a slot structure with divots (132) formed in the side surfaces of the die pins between the feedholes and the exit face, entrance slot portions between the feedhole outlets and the divots, the entrance slot portions having an entrance slot width WA, and exit slot portions between the divots and the exit face, the exit slot portions having an exit slot width WB, wherein WA>WB over an entire slot length. Methods of manufacturing honeycomb structures using the honeycomb extrusion dies and of fabricating the extrusion dies are provided as are other aspects.

    HONEYCOMB EXTRUSION DIE HAVING SWELL RELIEF
    5.
    发明申请
    HONEYCOMB EXTRUSION DIE HAVING SWELL RELIEF 有权

    公开(公告)号：US20220347883A1

    公开(公告)日：2022-11-03

    申请号：US17774198

    申请日：2020-11-19

    Applicant: CORNING INCORPORATED

    Inventor： David Jack Bronfenbrenner ,  Michael James Lehman

    IPC: B28B3/26

    Abstract: Improved extrusion dies are described herein for manufacturing a honeycomb body structure (330) from honeycomb extrudate (104). An improved extrusion die (102) comprises a swell relief feature in a discharge slot (218) of the extrusion die (102) that is disposed upstream of a discharge surface (214) of the extrusion die (102). The swell relief feature comprises a change in the width (W) of the discharge slot (218).

    EXTRUSION DIES WITH ZONED COATINGS, METHODS OF FABRICATING SUCH DIES, AND METHODS OF MANUFACTURING CERAMIC ARTICLES
    6.
    发明公开
    EXTRUSION DIES WITH ZONED COATINGS, METHODS OF FABRICATING SUCH DIES, AND METHODS OF MANUFACTURING CERAMIC ARTICLES 审中-公开

    公开(公告)号：US20230398716A1

    公开(公告)日：2023-12-14

    申请号：US18032085

    申请日：2021-11-22

    Applicant: CORNING INCORPORATED

    Inventor： Thomas William Brew ,  Keith Norman Bubb ,  Ryan Joseph Grohsmeyer ,  Michael James Lehman ,  Kenneth Charles Sariego ,  Min Shen

    IPC: B28B3/26

    CPC classification number: B28B3/269 ,  B28B2003/203

    Abstract: An extrusion die (16) including a plurality of pins (38) having side surfaces defining an intersecting array of slots (30) extending axially into the die (16) from a discharge face (34) of the die (16). A plurality of feedholes (28) extend axially from an inlet face (32) of the die (16) opposite to the discharge face (34). The feedholes (28) connect with the slots (30) at intersections (35) within the die (16) to create a flow path from the inlet face (32) to the discharge face (34). A first coating (42) is on at least a portion of the feedholes (28) in a first zone (46) extending over a first axial length of the flow path. A second coating (44) that is different than the first coating (42) is on at least a portion of the side surfaces (37) of the pins (38) in a second zone (48) extending over a second axial length of the flow path. Methods of fabricating an extrusion die (16) and manufacturing a ceramic article (100), such as a honeycomb body, are also disclosed.

    Die Assembly And Method Of Extruding Cellular Ceramic Substrates With A Skin
    8.
    发明申请
    Die Assembly And Method Of Extruding Cellular Ceramic Substrates With A Skin 审中-公开
    挤出细胞陶瓷基底与皮肤的模具组装和方法

    公开(公告)号：US20130285281A1

    公开(公告)日：2013-10-31

    申请号：US13929055

    申请日：2013-06-27

    Applicant: Corning Incorporated

    Inventor： Michael James Lehman

    IPC: B29C33/42

    CPC classification number: B29C47/022 ,  B05D3/02 ,  B23P15/243 ,  B28B3/269 ,  B29C33/42 ,  B29C47/0028 ,  B29C47/12 ,  B29D99/0089 ,  B29L2024/006 ,  B29L2031/60 ,  B32B3/12 ,  B32B2305/024 ,  C04B41/0018

    Abstract: An extrusion apparatus including a die and a mask are provided such that no slots feed directly into the longitudinal skin forming gap between the mask and the die. In a method of forming a die adapted to improve skin uniformity of extruded cellular ceramic substrates a slotted block of die material is provided including central slots adapted to form a cellular matrix of the substrate and peripheral slots located outwardly of the central slots designed to be covered by a skin former mask and adapted to extrude peripheral batch material. An arcuate skin former is cut corresponding to a target shrinkage so as to intersect the slotted block such that skin flow from tangent slots at 90 degree positions of the die is limited to the peripheral batch material.

    Abstract translation: 提供了包括模具和面罩的挤出装置，使得没有狭槽直接进入面罩和模具之间的纵向皮肤形成间隙。 在形成适于改善挤出的多孔陶瓷基底的皮肤均匀性的模具的方法中，提供了一种模切材料的开槽块，其包括适于形成基底的细胞矩阵的中心狭槽和位于设计成被覆盖的中心狭槽外侧的外围槽 通过皮肤前掩模，并适于挤出外围批料。 弧形皮肤成形器对应于目标收缩被切割成与开槽块相交，使得来自模具的90度位置的切线槽的皮肤流动被限制到周边批料。

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