| 摘要 |
A slide driving device employs a variable-displacement pump/motor for drivin g a rotating element of the slide driving device. The displacement volume of the variable-displacement pump/motor, whose output drives the slide, is varied i n 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 reuse. 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.< /SDOAB>
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