Hot-runner mold for injection molding
US4657496A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | May 29, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/2893
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A hot-runner mold for injection molding for obtaining a product constructed of a multi-layered body made of two kinds of thermoplastic resinous materials comprises: a first hot-runner which communicates with an outlet formed in a hot-runner block and is provided in an interior of the hot-runner block; an outer stem received in the first hot-runner; a second hot-runner which communicates with an outlet formed in the outer stem and is provided in an interior of the outer stem; and an inner stem which is reciprocally movably received in the second hot-runner so that a front end portion of the inner stem conducts an opening/closing operation of each of the outlets of the hot-runner block and the outer stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.