Apparatus for mixing and injection molding thermosetting polyurethane
US6435854B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Nov 12, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Nov 12, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C67/246
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is an apparatus for mixing and injection molding thermosetting polyurethane. The invention involves using a premixer comprising of a series of specially designed premixing chambers, one or more static, rather than dynamic, mixers, and a specially designed dual-path mixer. After the material is mixed it is pumped into an injector, and then deposited into a mold. This entire process is accomplished in an airtight environment. The mold into which the material is pumped is attached to a vacuum that decreases the chances of any air bubbles being trapped inside the mold. New features of the apparatus include a dual-path mixer and a newly designed premixing chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.