Die for extruding ceramic honeycomb structural bodies
US4687433A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 24, 1986 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Feb 24, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28B3/269
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A die for extruding honeycomb structural bodies includes a plurality of ceramic batch exhaust grooves and a plurality of ceramic batch supply apertures. Tubes are fitted in at least some of the ceramic batch supply apertures to improve or make constant the surface roughness and dimensions of inner surfaces of ceramic batch supply apertures through which the ceramic batch passes, thereby producing perfect ceramic honeycomb stuctural bodies. The adjustment of flow of ceramic batch is so simplified that any other controlling plate which would be required in the prior art is not needed for controlling the flow. When the supply apertures have been worn off, the tubes are exchanged by new ones to restore the required inner surfaces easily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.