Injection molding apparatus with replaceable gate insert
US7771189B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 2008 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Oct 11, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/253
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Injection molding apparatus has upper and lower mold halves that split along the center line of the parison cavity and the gate passage leading thereto. Each hot melt injection nozzle is received within a tubular insert cup having a reduced diameter tip that is seated within the gate passage. The cup is supported on the lower mold half so as to remain thereon as the upper mold half opens and closes the mold. The base end of each nozzle has a swivel ball and socket relationship with the manifold block which supplies it with hot melt, while the tip end of each injection nozzle is configured to permit swivelling within the insert cup as need be to accommodate dimensional changes that arise during non-uniform thermal expansion and contraction of different parts of the tooling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.