Injection molding valve pin actuator mechanism
US4212627A · kind A · utility
Inventor
Key dates
| Filing date | Dec 14, 1978 |
| Grant date | Jul 15, 1980 |
| Priority date | — |
| Expiry date | Dec 14, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/227
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to improved mechanism for actuating injection molding valve pins. In one embodiment, the mechanism is located between two parallel rows of valve pins located in a common plane with their driven ends adjacent the mechanism. The mechanism includes a central elongated member which is longitudinally reciprocable and two parallel elongated transversely reciprocable side members, each located between the central member and one of the rows of valve pins. Each of the side members is connected to the central member by a number of spaced pairs of pivotally connected pins and the central member is secured against transverse motion, while the side members are secured against longitudinal motion. Therefore, the side members are reciprocated transversely when the central member is reciprocated longitudinally by a hydraulic cylinder. The side members each have outer faces in contact with the driven ends of the valve pins of one of the rows and the outward motion of the side member actuates the valve pins along their longitudinal axis to a closed position in which the tips of the valve pins are seated in their respective gates. When the central member is returned to the open…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.