Slide driving device for presses

Details Slide driving device for presses Slide driving device for presses

1997-11-18

2000-07-11

Ryznic, John E.

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

72454, 60418, 60446, 60448, F16D 3102, B21J 918

Patent

active

060855207

ABSTRACT:
A slide driving device employs a variable-displacement pump/motor for driving a rotating element of the slide driving device. The displacement volume of the variable-displacement pump/motor, whose output drives the slide, is varied in response to deviation of measured driver parameters from commanded driver parameters. An energy storage device temporarily absorbs excess energy during a portion of a molding cycle, and returns the energy to the system for re-use. In one embodiment, the energy storage device is an accumulator. In a second embodiment, the energy storage device is a flywheel. The combination of variable displacement volume and energy storage maintains the fluid pressure substantially constant during a cycle of the slide driving device.

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patent: 5526738 (1996-06-01), Logan
patent: 5568766 (1996-10-01), Otremba et al.
patent: 5794442 (1998-08-01), Lisniansky

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