Textiles: spinning – twisting – and twining – Apparatus and processes – Open end spinning
Patent
1994-06-21
1996-02-20
Hail, III, Joseph J.
Textiles: spinning, twisting, and twining
Apparatus and processes
Open end spinning
D01H 438
Patent
active
054919665
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a process for open-end spinning in which the fibers coming from an opener device, after leaving a fiber feeding channel are conveyed to a surrounding spinning rotor with a sliding wall and a fiber collection groove in which the fibers are deposited in the fiber collection groove and are then spun into the end of a continuously withdrawn yarn, as well as to a device to carry out this process.
In a known open-end spinning device, the fiber feeding channel is subdivided into several longitudinal segments positioned at an angle to each other in adaptation to different rotor diameters (DE 37 34 544 A1), however without any special measures being taken to optimize the fiber depositing on the fiber collection surface of the spinning rotor. As a consequence, different yarn qualities are produced, depending on rotor diameter and the deflection of the fibers selected as a function thereof.
OBJECTS AND SUMMARY OF THE INVENTION
It is therefore a principal object of the instant invention to improve the feeding of the fibers into the spinning rotor so that the disadvantages mentioned are avoided and yarns of high quality are produced. Additional objects and advantages are set forth in the following description, or maybe obvious from the description, or may be learned through practice of the invention,.
The objects are achieved according to the invention in that fibers emerging from the fiber feeding channel are at first compressed substantially in one plane as they spread out in the circumferential sense of the spinning rotor and are at the same time spread out in the circumferential sense of the spinning rotor to be then fed in the form of a thin veil over part of the circumference of the spinning rotor, i.e. on its sliding wall. As a result of the compression of the fiber stream, the fibers are deposited substantially at one contour line of the sliding wall of the spinning rotor along which they slide in order to finally enter the fiber collection groove. Furthermore the fiber stream is spreading out in the circumferential sense whereby the speed is being reduced. The air which is deflected in the spinning rotor towards its open edge is thereby decelerated so that its influence on the fibers decreases and the danger that fibers may be pulled along by the air and be removed over the open rotor edge is reduced considerably. The spreading out of the fibers prevents the flight paths of the fibers leaving the fiber feeding channel from crossing each other so that this type of fiber feeding makes it possible to obtain a substantially orderly fiber deposit on the sliding wall.
Provisions are preferably made for the fibers to be compressed parallel to the plane passing through the fiber collection groove.
In principle, the fibers can also be fed to the sliding wall along a conical surface preceding the sliding wall. The air must thus be deflected very strongly for its removal, so that particularly good separation of fibers and air is achieved. A simpler design and more precise feeding of the fibers on the sliding wall can be achieved according to the invention in that the fibers emerging from the fiber feeding channel are conveyed parallel to the plane passing through the fiber collection groove as they spread out.
The fibers are preferably fed to the sliding wall of the spinning rotor in proximity of the open rotor edge. Surprisingly it has been shown that yarn values are optimized in this manner.
It has been shown that it may be advantageous for the improvement of the spreading of the fibers if the fibers emerging from the fiber feeding channel are subjected to a bunched air stream.
Particularly good spinning results are achieved if the air emerging from the fiber feeding channel according to the invention is guided into proximity of the sliding wall of the spinning rotor.
The objects of the invention are attained with respect to a device in an open-end spinning device with a spinning rotor and a fiber feeding channel having at least two longitudinal segments,
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Hail III Joseph J.
Rieter Ingolstadt Spinnereimaschinenbau AG
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