Extrusion dies
US11534937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2018 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | May 20, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2330/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A honeycomb extrusion die body (401) including inlet (414) and exit (402) faces, and a plurality of pins (406) on the exit face (402) defining a matrix of intersecting wide slots (425) and narrow slots (427). The wide slots (425) have an exit width (W1) greater than an exit width (W2) of the narrow slots (427). The die body (401) further includes feedholes (422) at the inlet face (414) and intersecting with inlet portions (416) to the wide slots (425) and/or the narrow slots (427). Some of the pins (406) defining the wide slots (425) include a first surface indentation feature (430) that is (i) located between the inlet portion (416) and the wide slot exit and (ii) spaced away from the wide slot exit. Some of the pins (406) defining the narrow slots (427) include a second surface indentation feature (434) that is (i) located between the inlet portion and the narrow slot exit and (ii) spaced away from the narrow slot exit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.