Method and apparatus for maintaining constant winding density in

Details Method and apparatus for maintaining constant winding density in Method and apparatus for maintaining constant winding density in

1997-06-26

1999-09-21

Mansen, Michael

Winding, tensioning, or guiding

Helical or random winding of material

Distributing material along the package

2424818, B65H 5438, B65H 5428

Patent

active

059542896

ABSTRACT:
A method of producing a random wound yarn package includes driving a yarn package with a friction roller, setting and maintaining a constant yarn tension in the yarn, setting and maintaining a constant contact force between the friction roller and the yarn package being driven thereby, and temporarily regulating the yarn tension and the contact force during a time of a pattern winding zone of the winding process in order to maintain a constant winding density both before and during the time of the pattern winding zone. The winding station includes a friction roller for driving the yarn package, a yarn tensioner, a device that generates a constant contact force between the yarn package and the friction roller, and an evaluation and regulation unit that temporarily regulates the yarn tension generated by the yarn tensioner and the contact force generated by the device during the time of the pattern winding zone. A program of the evaluation and regulation unit regulates the yarn tension and the contact force by predetermined amounts and at predetermined times. Alternatively, yarn application representative of winding density is calculated based upon circumferential velocity, angular velocity, period, and/or frequency of the yarn package and friction roller continuously detected by sensors, and the yarn tension and contact force are regulated when the calculated yarn application deviates from a set value.

REFERENCES:
patent: 4696435 (1987-09-01), Hermanns
patent: 4715548 (1987-12-01), Miyake et al.
patent: 4828191 (1989-05-01), Ruge et al.
patent: 4964582 (1990-10-01), Hermanns et al.
patent: 5112000 (1992-05-01), Derichs et al.
patent: 5141169 (1992-08-01), Sugioka
patent: 5639037 (1997-06-01), Marangone et al.

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