Kieserling & Albrecht

Albrecht Gmbh & Co.

Th. Kieserling

Alois Weller

Wolfgang Mai

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 The pusher pin (3) returns to its withdrawn position relative to the slide (2). The pusher pin remains in the withdrawn position for the balance of the backward stroke.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.

Ejector mechanism for eccentric presses

In an improved crank press arrangement including a sled which is reciprocally mounted on the frame of the arrangement. A toggle lever is pivotably mounted on the sled. One arm of the toggle lever has a cam-follower roller whereas the other arm coacts with an ejector arm slidably mounted in the sled. A crank drive reciprocates the sled. A control cam is in contact with the cam-follower. The ejector rod coacts with a blank and a die to form a workpiece. The crank drive and control arm are operatively connected by means of a gear train. The contour and shape of the control cam is such that while the cam-follower roller is in continuous contact therewith, nevertheless a temporary standstill of the ejector rod occurs during the operative cycle of the arrangement.

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Erkrath, Germany

Alois Weller