Ejector mechanism for ejecting pressed parts from the bottom die

Metal deforming – With means to handle work or product – Including product handling means

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Details

10 11E, B21D 4500

Patent

active

040142035

ABSTRACT:
An axially movable ejector rod has one end abutting against one arm of a pivoted ejector lever. A second arm on the ejector lever has a generally radially extending plane surface that is contacted by a roller carried at the end of a lever arm pivoted on a supporting slide. The roller also rides on a second plane surface on one arm of an intermediate lever, the other arm of which is connected to a link. This link is reciprocated by a rotating cam, causing the intermediate lever to rock and pressing its plane surface against the roller. The roller, in turn, presses against the arm of the ejector lever and causes the latter to rock. As the intermediate lever and ejector lever rock on their respective pivots, the roller rolls along the respective plane surfaces. The supporting slide carrying the lever arm with its roller is movable in the direction to shift the roller along the two plane surfaces. In one direction of travel, the roller approaches closer to the pivot center of the intermediate lever and at the same time moves more distant from the pivot center of the ejector lever, thereby changing the effective moment arms of the two levers. An adjustment screw is provided to adjust the position of the supporting slide.

REFERENCES:
patent: 1592060 (1926-07-01), Wilcox
patent: 2547304 (1951-04-01), Broscomb
patent: 3158047 (1964-11-01), Carlson
patent: 3238761 (1966-03-01), Hoyt
patent: 3619835 (1971-11-01), Nebendorf
patent: 3820376 (1974-06-01), Koch et al.

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