| 摘要 |
The application discloses the reduction of slack in metal coil slitting lines, wherein a relatively wide strip is passed through a slitting instrumentality by which it is slit into a plurality of narrower strips which are then recoiled by a common recoiling device. Because of variations in thickness across the width of the original strip, the recoiled narrower strips which are being rewound simultaneously, will have various degrees of slack, resulting in some loose coils. According to the invention, an electrostatic fluidized bed is disposed between the slitting device and the recoiler, below the slit strips. The bed contains a suitable powder, such as mica; and as any one of the slit strips sags toward the fluidized and charged bed, it picks up some of the charged powder particles. The pick-up is proportionate to the amount of sag, or proximity of the sagging strip to the bed. The picked up powder is trapped in the wraps of the strip on the recoiler, effectively thickening the wrap, and thus restores tension and results in taking up the slack. The system is self-compensating and automatic.
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