Method and device for controlling and/or regulating thread tension during winding of a textile coil
AssigneeW. Schlafhorst AG & Co.
InventorsHans Raasch, Hans Ludwig Neuhaus
Life of this patent
Estimating the term…
Abstract
Method of controlling or regulating tension in a thread being wound on a textile coil rolling on a winding roller of a thread-winding device, which includes varying the peripheral speed of the textile coil by varying the transmission ratio between the rotary speed of the winding roller and the rotary speed of the textile coil to an extent greater than the variation in the transmission ratio therebetween resulting from the increasing fullness of the winding on the coil.
Claims14
Method of controlling or regulating tension in a thread being wound on a textile coil rolling on a winding roller of a thread winding device, at least one of the winding roller and the textile coil being of conical construction, which comprises tipping one of the winding roller and the textile coil relative to the other so as to increase the compressive force of the textile coil on the winding roller toward one of the two ends of the line of contact therebetween whereby the peripheral speed of the textile coil is varied by varying the transmission ratio between the rotary speed of the winding roller and the rotary speed of the textile coil to an extent greater than the variation in the transmission ratio therebetween resulting from the increasing fullness of the winding on the coil.
Method of controlling or regulating tension in a thread being wound on a textile coil rolling on a winding roller of a thread winding device, at least one of the winding roller and the textile coil being of conical construction, which comprises tipping one of the winding roller and the textile coil relative to the other so as to increase the compressive force of the textile coil on the winding roller toward one of the two ends of the line of contact therebetween, whereby the peripheral speed of the textile coil is varied by varying the transmission ratio between the rotary speed of the winding roller and the rotary speed of the textile coil to an extent greater than the variation in the transmission ratio therebetween resulting from the increasing fullness of the winding on the coil, the extent to which the one of the winding roller and the textile coil is tipped relative to the other being dependent upon the parameter, fullness of coil winding as measured by the coil diameter, the tipping of the one of the winding roller and the textile coil relative to the other being to an extent different from that required by the value of the respective parameter, so that the actual thread tension continuously resulting therefrom is correspondingly different from the value thereof that would result from the extent of tipping of the one of the winding roller and the textile coil relative to the other required by the value of the respective parameter, and controllingly readjusting only in one direction of successive values thereof the thus differing thread tension to a nominal value thereof in accordance with the actual thread tension value.
Device for controlling or regulating tension in a thread being wound on a textile coil comprising coil frame means for holding a textile coil, a rotatable winding roller contactable with the textile coil for applying frictional pressure thereto so as to revolve the textile coil and wind a thread thereon, pressure-varying means associated with at least one of said winding roller and said coil frame means for continuously varying the contact pressure between the textile coil and said winding roller, and means for determining the fullness of the coil as a measure of the diameter thereof, said coil-fullness determining means being operatively associated with said pressure-varying means for controlling the same in accordance with the fullness of the coil, said coil frame means for holding the textile coil being tippable about an axis transverse to the longitudinal axis of the coil core so as to vary the pressure at the ends of the coil.
Dependencies are inferred from the claim text.