Injection molding nozzle seal
US4286941A · kind A · utility
47Cited by
2References
3Claims
0Family size
Inventor
Key dates
| Filing date | Jul 28, 1980 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Jul 28, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2834
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a nozzle seal for valve-gated injection molding. The hollow seal is seated in the nozzle portion of the heater cast and extends across the insulative air gap and into a gate aperture in the cavity plate. The inner bore of the nozzle seal is tapered to form the gate which receives the tip end of the valve pin in the closed position. The nozzle seal is formed of a poor conductive metal such as titanium alloy which conducts sufficient heat to provide a clean closing gate without resulting in unacceptable heat loss to the surrounding cavity plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.