Manufacturing method for selected gate configuration injection molding nozzles
US4663811A · kind A · utility
Inventor
Key dates
| Filing date | Dec 23, 1985 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Dec 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49989
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to an improved method of making nozzles for injection molding. The nozzles are heated by an electrical heating element which is cast in a copper portion between inner and outer stainless steel portions. The method includes making a main rear portion and a steel nose cap portion separately, brazing them together in a vacuum furnace to form an integral unit, and then finishing it by drilling and machining to provide it with a central bore and a particular gating configuration. This method has the advantage that a single inventory of unfinished nozzles can be maintained, from which a requirement for one of several gating configurations can be quickly supplied by finishing the nozzles according to that configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.