Production of a shaped filamentary structure
US5113568A · kind A · utility
Inventors
Key dates
| Filing date | Aug 24, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Aug 24, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53065
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention is concerned with a method and apparatus for producing a shaped filamentary structure and more particularly, to filamentary structures which can be subjected to further processing to produce a carbon-carbon product. A specific use of the invention is in the production of discs for use in aircraft braking systems. The method includes needle punching a unidirectional layer of filaments to give a degree of dimensional stability; cutting a plurality of segments from the layer of needle punched filamentary material; assembling a plurality of segments in side-by-side contiguous relationship to produce a filamentary layer of the required structural shape; superimposing at least one similar layer on the first layer and needle punching the assembled layers to produce cross-linking of the layers. In the preferred method of carrying out the invention, the layers of filamentary material are supported by a sub-structure which permits needle penetration, and this sub-structure is peeled off the final needle punched assembly. A further preferred feature includes assembling the segments in a former and rotating the former relative to a reciprocating needling head. The invention also …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.