Injection molding system having clamped rotatable nozzles and method
US4793795A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Dec 7, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2834
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a valve gated injection molding system in which a number of melt conveying nozzles leading to a common cavity are releasably clamped to the side surface of an elongated manifold. A cylindrical collar around the inlet to each nozzle is received in a recessed seat around each outlet from the manifold. This structure facilitates assembly and ensures alignment of the inlets and outlets, while permitting for some rotational movement between the nozzles and the manifold due to thermal expansion. The integral nozzles are made by vacuum casting a heating element and vacuum brazing a side member with a sidewards projecting face into a steel main body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.