Injection molding apparatus with a one-piece gate insert locating a cylindrical valve member
US5849343A · kind A · utility
45Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | May 9, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/308
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Valve gated injection molding apparatus having a valve member with a cylindrical front end portion. A one-piece insert mounted at the front end of a nozzle has both a gate and locating blades extending inwardly from an outer body into a central opening leading to the gate. The inner surfaces of the blades fit around the front end portion of the reciprocating valve pin to guide and very accurately locate it in alignment with the gate. Very accurately maintaining the front end portion of the reciprocating valve pin in alignment with the gate allows it to be cylindrical rather than tapered which produces a much cleaner gate mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.