Metal deforming – With means to handle work or product – Including product handling means
Patent
1986-06-03
1988-01-26
Larson, Lowell A.
Metal deforming
With means to handle work or product
Including product handling means
72345, B21J 1314
Patent
active
047209909
ABSTRACT:
An ejector mechanism for multi-stage presses is disclosed. The pusher pin (3) runs inside of a slide (2). The pusher pin is supporter by a lever (6) on a cam curve (7) at the machine frame (1). The cam curve (7) is constructed such that it effects a resting of the pusher pin relative to the machine frame during the period of ejection. The work piece (4) is thereby maintained in an unchanged position between the matrix (34) and the pusher pin (3). The ejection process is interrupted by a lowering of the cam curve (7) by the control means (8). The pusher pin (3) returns to its withdrawn position relative to the slide (2). The pusher pin remains in the withdrawn position for the balance of the backward stroke. An adjustment of the stroke length is performed within the control means (8). A control cam curve (10) is provided, which is composed of several parts (11,12), which can be tilted against each other and which can be slid past each other. The parts thus determine an effective length of the region 13, which is responsible for the timely interruption of the ejection stroke.
REFERENCES:
patent: 3299453 (1967-01-01), Van De Meerendonk
patent: 4296625 (1981-10-01), Weller et al.
patent: 4552525 (1985-11-01), Stehr
Albrecht GmbH & Co.
Kasper Horst M.
Larson Lowell A.
Th. Kieserling
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