Injector nozzle and method
US6349886B1 · kind B1 · utility
19Cited by
5References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 16, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Jun 16, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/308
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A coinjection nozzle communicating with a mold cavity to form a multilayered article and an injection molding method are provided. The nozzle includes at least two flow channels communicating with an outlet, with each flow channel including at least one spiral groove that decreases in depth towards the outlet area to eliminate weld lines and dips in the resultant article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.