Process and apparatus for nucleation control adapted for reaction injection molding of cellular products
US4312820A · kind A · utility
12Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1980 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | Aug 21, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/83
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A novel apparatus and method are provided for monitoring gas entrainment in liquid precursors for reaction injection molding (RIM). In accordance with the invention, a nucleated RIM precursor is sampled and the sample subjected to a controlled volumetric change. The measured pressure of the expanded or compressed sample is compared to that corresponding to the ideal degree of gas entrainment. The comparison is used to control the addition or withdrawal of entrained gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.