Nozzle for gas assisted injection molding
US5164200A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jun 18, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/1735
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A nozzle for the injection of a viscous fluid, such as a thermoplastic and a non-viscous fluid such as a gas into a mold cavity of a mold body includes a valve element mounted for reciprocation in a nozzle body flow passage to control a flow of viscous fluid through the nozzle body discharge end and into a mold cavity. The valve element includes a barrel having a first end selectively engaging a portion of the nozzle body discharge end to prevent a flow of viscous fluid therepast and a second end. A bore extends longitudinally through the barrel and a pin is positioned in the barrel bore. The pin has a first end located adjacent the barrel first end and a second end which is secured to the valve element such that the pin moves with the barrel as it reciprocates in the nozzle body. A non-viscous fluid flow passage is defined between the pin and the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.