Honeycomb extrusion dies and methods of using and making same
US12397469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2022 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Oct 24, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/3003
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.