Cold isopressing method and mold
US6776941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Mar 13, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A cold isopressing method and mold for compacting a granular ceramic material in which the granular ceramic material is introduced into a cylindrical pressure bearing element of an isopressing mold. The cylindrical pressure bearing element is sufficiently rigid so as to maintain its shape during the introducing of the granular ceramic material. Such element is also sufficiently resilient in a radial direction thereof to deform and bear against the granular ceramic material upon the application of the hydrostatic pressure and to substantially return to its original shape upon the relaxation of the hydrostatic pressure, thereby to allow retraction of the cylindrical pressure bearing element from the granular ceramic material after compaction. In a further aspect, an isopressing method and mold is provided in which the cylindrical pressure bearing element thereof is provided with an enlarged end bore to form an enlarged end section in the finished ceramic tube for sealing purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.