Cauls and methods of using cauls to produce composite articles
US10391684B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2016 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Jul 12, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/731
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Cauls and methods of using cauls to produce composite articles are provided. The caul transitions from a rigid state to an elastomeric state and from an elastomeric state to a rigid state in response to a stimulus and has a reinforcement density of from 100 kg/m3 to 500 kg/m3. Methods of using cauls to produce composite articles involve positioning one or more fiber layers between a caul and a cure mold surface when the caul is in a rigid state. The fiber layers, caul, and cure mold surface may be covered with a sealed barrier and a pressure gradient may be applied. Before, after, or before and after performing the vacuum the fiber layers may be impregnated with resin. The fiber layers may be cured, which may provide a stimulus to transition the caul from a rigid to an elastomeric state, and the composite article is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.