Injection molding machine
US4715802A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Jun 19, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/229
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a molding machine wherein in molding a molded article, the molded article is molded into a so-called sandwich shape in which the central portion of the molded article is molded with core layer resin and the outer surface of the core layer is wrapped with skin layer resin, a valve for changing over and injecting the resins from a first injection cylinder for injecting the core layer resin and a second injection cylinder for injecting the skin layer resin is substantially cylindrical, a cut-away portion for changing over and distributing the resins is formed in the central portion of the valve, and sandwich molding is accomplished with the opening-closing of the cut-away portion and each passageway being effected by rotation of the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.