Die for extruding ceramic material to form a body of cellular structure, and a method of obtaining said die
US4343604A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1980 |
| Grant date | Aug 10, 1982 |
| Priority date | — |
| Expiry date | Oct 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49865
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to the manufacture of a body of a cellular structure by extruding a ceramic material through a die. The die comprises a succession of coaxial components (6, 10) fitted one round another, with two adjacent components defining between them longitudinal ducts (2) whose downstream ends communicate with an annular duct (3) and wherein the bottoms of said coaxial components fitted one round another have essentially radial notches (4) level with the annular ducts, the width of said notches being less than that of the longitudinal ducts, so that the ceramic material which flows through said longitudinal ducts is evenly distributed in the annular ducts and in the radial notches to form a body with a cellular structure directly on extrusion. The invention has application to thin-walled honeycomb ceramic structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.