Fluid forcing nozzle
US5306134A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1991 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Jun 12, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86823
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for gas assisted injection molding having a fluid forcing nozzle with a minimum of moving parts is shown. This apparatus produces an injected molded article by forcing a stream of molding material from a source of molten plastic through a fluid forcing nozzle into an article forming mold space. After the desired amount of material has been injected to fill the mold cavity, the flow through the fluid forcing nozzle is shut off, and replaced by a pressurized fluid or gas flow. The fluid forcing nozzle has an operable valve part operable between a first position and a second position. When the valve part is in its first position, a continuous flow channel from an injection molding machine to a mold sprue is provided for a molten plastic material. When the valve part is in its second position, a portion of the first flow channel is blocked, and a flow channel for an injection gas to the mold sprue is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.