Runner switch for an injection molding machine
US4909725A · kind A · utility
Inventor
Key dates
| Filing date | Oct 25, 1988 |
| Grant date | Mar 20, 1990 |
| Priority date | — |
| Expiry date | Oct 25, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/2703
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for switching runners in an injection molding system of the type having cavities which are joined by runners, the apparatus having a bushing member which has a top end, a bottom end and a central aperture, the bottom end having at least two outwardly disposed runner extensions which are in flow communication with the central aperture and the cavity runners, a bushing insert which is sealingly and rotatably fitted within the central aperture of the bushing member and which has a bottom end having therein a runner extension device which is in flow communication with one of the runner extensions in the bushing member when the bushing insert is in one position and which is in flow communication with another runner extension in the bushing member when the bushing insert is in a second position; and an indexing member carried by the bushing insert and the bushing member for establishing a plurality of predeterined relative positions of the bushing insert relative to the bushing member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.