In-runner polymer melt mixer
US5688462A · kind A · utility
9Cited by
13References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Jul 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/308
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In an injection molding process for making thermoplastic articles an in-runner static mixer is positioned near the gate to a mold cavity to mix molten thermoplastic such that said thermoplastic exiting the in-runner static mixer is more homogeneous with respect to temperature than that entering the in-runner static mixer. Passing the more homogeneously mixed molten thermoplastic through the gate to the mold cavity and allowing said cavity to fill and thermoplastic to cool, will result in an article aesthetically superior to one made by a process where no in-runner static mixing device is employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.