| 摘要 |
<p>The apparatus for winding flexible material on to a mandrel provides a control system for automatically controlling the packing density of the wound material. The mandrel (M) is rotatably mounted on one end of an arm (A) which is mounted to pivot about a horizontal axis (F) at the other end of the arm. The package being wound rests on a bar (PB) and pressure is applied to the periphery of the package by a weight (W). The effect of the weight (W) is reduced by a piston slidable in a cylinder, air pressure (p) being applied to the underside of the piston. The air is provided by means of a pump driven by an electric motor through a mark-space control. This control varies the means speed of the pump in dependence on an error signal derived from the difference between the output of a load sensor and a reference value. In addition, the reference signal may be varied by means of a measurement of the diameter of the package.</p> |
