Apparatus for injection molding of bodies with a core and skin of different materials
US3947175A · kind A · utility
55Cited by
9References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1973 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Dec 7, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/224
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Injection molding apparatus for discontinuous fabrication of molded bodies consisting of a plurality of layers with a foaming core and an outer skin of non-foaming thermoplastic material, the apparatus consisting of an injection head connected to two extruders and equipped with a centrally-located jet surrounded by a ring jet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.