Method and apparatus for manufacturing polyurethane foam injected with strand mats
US6929459B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2002 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Apr 21, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus for manufacturing a polyurethane foam injected with strand mats. After a polyurethane foam solution is sprayed on the strand mats, the strand mats are moved upward and downward by prominences and depressions and then intermittently pressed by a pressing device, thereby the air in the strand mats being exhausted to the outside. Therefore, the polyurethane foam solution uniformly permeates into the strand mats. As a result, the insulating effect and mechanical strength of the polyurethane foam are increased, uniform surface with no air spaces is obtained, the mechanical properties are made uniform, and shrinkage, cracking, distortion and the like are prevented under a super-low temperature such as less than −165° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.