Independent-stroke ejection system
US5227178A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1992 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Apr 22, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An independent-stroke ejection system for an injection molding apparatus enables the motion of an ejector pin, or pins, to be controlled independently of the motion of the knock-out plates. The so-called independent-stroke ejector pin is mounted on an independent-stroke knock-out pin retainer rod which is alternately locked to and unlocked from the reciprocating motion of the knock-out plates. As a consequence, the independent-stroke ejector pin moves only during a portion of the reciprocating cycle of the knock-out plates, and does not advance and retract over an equivalent distance. While ejector pins are usually mounted on the knock-out plates, and reciprocate over an equivalent distance, the present invention enables one to uncouple the motion of an ejector pin from the knock-out plates for a portion of the reciprocating cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.