Oerlikon Textile Gmbh & Co Kg

Saurer-allma Gmbh

Walter Schlagenhaft

A two-for-one twister or cabling machine and a method for operation thereof, wherein a yarn () is withdrawn from a supply bobbin () and fed to a guide device below a twisted yarn plate () of the spindle () and from which the yarn () exits virtually perpendicular to the axis of the spindle () and is deflected to the outer edge of the twisted yarn plate () and runs along the spindle () as a free yarn balloon (B) encompassing the spindle (), until the yarn () is fed into the twist or cabling point of a yarn guide device () above the spindle (). The supply speed of the yarn () is adjusted to achieve a yarn tension which minimizes the yarn balloon diameter as a function of the spindle geometry.

Method for operating a spindle of a two-for-one twister or cabling machine

The electromagnetic hysteresis brake, especially a yarn brake for textile machines, comprises a stationary brake magnet (,), which consists of inner and outer pole ring parts (,) and a magnet winding (,), and a rotating armature (,), which is connected to a hysteresis ring (,) of permanent magnetic material. The hysteresis ring (,) projects into an annular air-gap (,) of the brake magnet (,), which is formed between the inner and outer pole ring parts (,). At least one permanent magnet (,) is so arranged adjacent the magnet winding (,) that the magnetic field in the air-gap (,) is formed by cooperation of the magnetic fluxes of the electromagnet (,) and the permanent magnet (,). The magnetic flux of the electromagnet (,) can be adjusted in magnitude and direction in the gap by corresponding poling that it assists or counteracts the magnetic flux of the permanent magnet.

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Kempten, Germany

Walter Schlagenhaft