Coinjection hot runner injection molding system
US9498911B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2011 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | May 22, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/1684
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A coinjection molding apparatus is disclosed that provides a skin material melt stream and a core material melt stream to a nozzle. The skin material melt stream forms an inner and outer layer of a molded article with the core material melt stream forming a core layer between the inner and outer skin material layers. A volume of the core material for forming the core layer may be manually adjusted between injection cycles to change a thickness of the core layer between a first molded article and a second molded article. Alternatively, a volume of the core material for forming the core layer may be automatically adjusted during an injection cycle to change a thickness of the core layer during formation of the molded article, such that the molded article will have a core layer with at least a first thickness and a second thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.