Injection molding valve member with head and neck portions
US5695793A · kind A · utility
38Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1996 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Jun 12, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2879
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molding valve member having a smaller neck portion leading to a short head portion. This facilitates the backflow of melt around the head portion as the valve member is driven forwardly to the closed position. In one embodiment, the neck portion is formed by a number of flutes spaced around the valve member having lands between them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.