Method and device for automatically detecting yarn cake remnants during pot spinning
AssigneeW. Schlafhorst AG & Co.
InventorKarl Koltze
Life of this patent
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Abstract
A method for operating a pot spinning machine which has a plurality of identical work stations each having a drafting device with a slubbing stop device, a spinning centrifuge rotating at high speed around an axis, and a tubular reciprocable guide. A slubbing emerging from the yarn guide mouth forms a rotating yarn leg which is deposited on the inner wall of the spinning centrifuge in the form of a spinning cake. At the start of a spinning cycle of the spinning machine, the individual spinning centrifuges of the spinning machine are checked for the presence of yarn cake remnants.
Claims14
In a method of spinning yarn in a pot spinning machine having a plurality of work stations each including a rotating spinning centifuge and a guide reciprocable with respect thereto, wherein the method comprises at each work station the steps of drawing a fiber slubbing by means of a drafting device, feeding the drawn slubbing into the spinning centrifuge via the reciprocable guide, delivering the drawn slubbing in the form of a rotating leg extending from the guide to an inner wall of the spinning centrifuge while twisting the slubbing into the form of a yarn, and depositing the yarn in the form of a yarn cake on the inner wall of the spinning centrifuge, the improvement comprising automatically checking the spinning centrifuge of each individual work station for yarn cake remnants at a start of the spinning method.
In a pot spinning machine having a plurality of work stations each including a rotating spinning centrifuge and a guide reciprocable with respect thereto, for introducing a drawn fiber slubbing into the centrifuge, the improvement comprising a sensor device for detecting at least one physical value prevailing at the spinning centrifuge of each individual work station in the course of a spinning operation and determining the presence of a yarn cake in the respective spinning centrifuge, wherein the sensor device is a yarn sensor arranged between a drafting device and the reciprocable guide for detecting the presence of the slubbing, a filter stage for detecting a signal corresponding to a rotary frequency of a yarn leg extending from the reciprocable guide to the spinning centrifuge, and an evaluation circuit in which the signals corresponding to the rotary frequency of the yarn leg may be compared with a preset value.
Dependencies are inferred from the claim text.