Sprue apparatus
US7401639B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 2003 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Jul 6, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2754
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sprue apparatus for use in a molding apparatus for connecting the melt duct of a molding machine nozzle with a runner system of a molding apparatus. The sprue apparatus includes a plurality of thermal regulators that regulate a plurality of thermal zones that segment the length of the sprue apparatus for the purpose of localized temperature control in support of a molding process. The plurality of zones may be thermally regulated such as to enable a substantially leak-free junction between the machine nozzle and the molding apparatus. The sprue apparatus may include an isolating coupler that substantially isolates a heated sprue bushing from carriage force. The invention has been found particularly useful when injecting metal alloys such as magnesium based alloys when in the thixotropic state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.