Opposed gating injection method
US5798069A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Sep 11, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/565
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The foregoing objects are attained by the opposed gating injection method and apparatus for forming molded articles and for use with injection molders wherein a first mold half and a second mold half are adapted to cooperate and form at least one mold cavity. A first injector nozzle is positioned in a first mold half adjacent the cavity, for injecting a first molding resin into the cavity through a first orifice. A second injector nozzle is included which is positioned in the second mold half adjacent the cavity for injecting a second molding resin. The second resin may be different from the first resin or the same as the first resin. The second resin is injected through a second orifice unconnected with the first orifice. The injector nozzles may be either simultaneously or sequentially activated for filling the mold cavity, and may be single material or co-injection type nozzles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.