Textiles: spinning – twisting – and twining – Apparatus and processes – Receiving twist type
Patent
1993-02-26
1995-09-12
Stodola, Daniel P.
Textiles: spinning, twisting, and twining
Apparatus and processes
Receiving twist type
57 76, 57279, 57313, 57352, D01H 108, D01H 774
Patent
active
054488800
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to the textile industries or, more specifically, to centrifugal spinning machines, and can be used for the production of yarns from any type of fibre.
DESCRIPTION OF THE PRIOR ART
There is known a centrifugal spinning machine (M. I. Kulagin. Novyye sposoby pryadeniya sherstyanykh i khimicheskikh volokok (Russ.--New Methods for Spinning Wool and Man-Made Fibres), Moscow, Legkaya Industriya (Publishers), 1974, pp. 28-30), wherein each spinning unit contains a drawing mechanism, a yarn spreader, and a centrifuge. For spun yarn removal from the centrifuge, special bobbins (spools) are introduced thereinto, with immobile pirns (cores, tubes) placed over the bobbins. The yarn is thrown over the top end of an immobile pirn to be rewound over it by dint of the centrifuge's rotation, with bobbin and pirn withdrawn from the centrifuge thereafter.
One disadvantage of this machine is low output, due to a large number of manual operations associated with its use, such as spinning-in, moving bobbins in and out while rewinding, as well as operations associated with elimination of yarn breakage aftereffects.
Another disadvantage of this machine is that there is always a risk of yarn entanglement, while the yarn is rewound from the centrifuge rotating at a high speed, because of several/turns leading at a time from the centrifuge on to the pirn.
Another prior-art centrifugal spinning machine (M. I. Kulagin. Novyye sposoby pryadeniya sherstayanykh i khimicheskikh volokon (Russ.--New Methods for Spinning Wool and Man-Made Fibres), Moscow, Legkaya Industriya (Publishers), 1974, pp. 30-33) has a spinning unit comprising a pneumatic scroll tube mounted under the drawing mechanism and enabling automation of the spinning-in operation. However the second of the afore-mentioned disadvantages is likewise inherent in this other machine, inasmuch as yarn removal from the centrifuge likewise involves the use of immobile pirns to be introduced inside the centrifuges.
Also known in the art is a centrifugal spinning machine (SU, A, 1,666,587) consisting of several spinning units, each comprising the following elements arranged vertically down the yarn flow path: a drawing mechanism, a scroll tube, a yarn sensor, a cylindrical yarn conductor composed of two vertically spaced sections, with a clamping element in between, and a centrifuge complete with a yarn spreader installed so as to be capable of moving vertically inside the centrifuge bowl which has its open end facing upwards. The machine also contains yarn rewind devices to remove yarn from the centrifuges of the spinning units and means to thread yarn into the rewind devices, with the number of both rewind devices and yarn thread-in means being equal to that of the spinning units.
The yarn rewind assembly consists of a winding drum and a pirn holder mounted on a lever capable of rotating until the surface of the pirn placed in the pirn holder is in contact with that of the winding drum. The means to thread yarn into the rewind assembly has the form of two eye rings mounted one above the other between the clamping element and the lower section of the yarn conducting cylinder in line with the latter and roughly at the rewind assembly level. Each of the eye rings is linked with a lever of its own, and as this is turned the respective eye ring is removed from the yarn conductor zone toward the rewind assembly.
While spinning is in progress, the eye rings are in the position aligned with the yarn conducting cylinder, the yarn mowing vertically through the yarn conductor and eye rings from the automatic spinning-in device to the centrifuge. When the spun yarn is unloaded from the centrifuge, the clamping element holds the yarn while the eye ring levers are turned to displace the eye rings in a manner such that the yarn entrained therewith should be drawn in between the drum and pirn and wound over the latter.
Compared to the previously discussed counterpart, this machine affords automation of not only the yarn spinning-in operation, but also
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M. I. Kulagin. Novyye sposoby prydadeniya sherstyanykh i khimicheskikh volokon (Russ.--New Methods for Spinning Wool and Man Made Fibres), Moscow, Legkaya Industriya (Publishers), 1974, pp. 28-33.
Savinov Evgeny R.
Zeldin July R.
Nauchno-Proizvodstvennoe Obschestvo s Ogranichennoi Otvetstvenno
Stodola Daniel P.
Stryjewski William
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