Extrusion device for producing honeycomb structures
US4368025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1981 |
| Grant date | Jan 11, 1983 |
| Priority date | — |
| Expiry date | Jan 21, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/60
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extrusion device comprises a die provided with feed passageways and grid-shaped extrusion slots, and a die mask covering the peripheral portion of the die on the extrudable material outlet side. The die mask is provided with a plurality of disconnected openings which are formed in the lower end of the inner surface thereof at predetermined intervals so as to be communicated with the extrusion slots of the peripheral portion of the die. By this extrusion device, the extrudable material is supplied from the openings into the outer periphery of the extruded body to form a honeycomb structure having a smooth outer peripheral surface and a thick outer wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.