System for continuously manufacturing a composite preform
US6543469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Sep 14, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7761
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A system for mixing and dispensing a structural foam formed from two or more component foam parts mixed together in a predetermined mass ratio. At least a first one of said component parts is pre-mixed with a blowing agent and maintained under pressure. The system comprises volumetric flow sensors to measure the rate of flow of each of the component foam parts to be mixed, a feedback loop comprising a digital computer, to determine whether the predetermined mass ratio has been achieved on an instantaneous basis, and at least one gear-type variable flow controller to reduce the flow rate of said first one of the component foam parts to be mixed. The gear-type variable flow controller is adjustable by at least one of an electro-mechanical, hydraulic or electrical type braking device in response to the rate of flow data measured by said volumetric flow sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.